Patent Application
20230115240
The invention relates to automated driver assistance systems generally and, more particularly, to a method and/or apparatus for implementing advanced driver-assistance systems (ADAS) feature activation control using digital map and on-board sensing to confirm safe vehicle operation.
The operational design domain (ODD) safety concept ensures a Society of Automotive Engineers Level 2-3 (SAE L2+) driver assistance feature is acceptably safe by reducing the exposure to challenging operational situations. Challenging operational situations are operational situations judged to be outside the known capabilities of advanced driver-assistance systems (ADAS) and, therefore, are considered hazardous. The goal of the ODD safety concept is to ensure that challenging operational situations are minimized to less than 1% of operating time when the driver assistance feature is active. The ODD safety concept uses on-board sensing to validate the operational situations reported by a digital map (e.g., electronic horizon) in real time. Lack of precision from satellite-based positioning systems (e.g., GNSS, GPS, etc.) used on production vehicles, and unknown quality of digital maps are two limiting conditions that do not allow map-based localization in the design of a safety solution employed in SAE L2+ advanced driver-assistance systems (ADAS) features. The unknown quality of digital maps can result from map production errors, and/or errors due to changes in reality, for example new construction zones that are not yet reported in the map.
It would be desirable to implement advanced driver-assistance systems (ADAS) feature activation control using digital map and on-board sensing to confirm safe vehicle operation.
The invention concerns an apparatus comprising a plurality of sensors, a digital map, and a control unit. The plurality of sensors may be configured to detect information about an exterior environment of a vehicle. The digital map may be configured to provide information about roadways in a vicinity of the vehicle. The control unit (i) may comprise an interface configured to receive (a) sensor status signals, (b) sensor-based information, and (c) map-based information, and (ii) may be configured to (a) determine whether an operational situation exists that is unsafe for an advanced driver-assistance systems (ADAS) automation feature to be activated or remain active based on the sensor-based information, the map-based information, and the sensor status signals, and (b) generate an activation control signal to restrict activation of the ADAS automation feature when an unsafe operational situation exists.
Embodiments of the invention will be apparent from the following detailed description and the appended claims and drawings.
Embodiments of the present invention include providing advanced driver-assistance systems (ADAS) feature activation control using digital map and on-board sensing to confirm safe vehicle operation that may (i) overcome lack of positioning accuracy and unknown quality of digital maps through the use of on-board sensing, (ii) implement an operation design domain aggregator (ODDA), (iii) be implemented as part of an active safety domain master, (iv) ensure SAE L2+ driver assistance features are not active when operational situations are outside an operational design domain of a vehicle, (v) obtain primary information about upcoming operational situations that the system may not be able to handle safely using information from a digital map, (vi) obtain secondary and/or redundant information about upcoming operational situations from on-board sensors (e.g., front looking camera (FLC), front looking radar (FLR), and front corner/side radars (FCR/FSR or FCSR)) of a vehicle, (vii) utilize the secondary channel information to identify upcoming unsafe operational situations that the primary channel information is unable to identify and report, (viii) utilize the secondary channel information to verify the presence of upcoming unsafe operational situations reported by the primary channel information, and/or (ix) be implemented as one or more integrated circuits.
The Society of Automotive Engineers (SAE) defines 6 levels of driving automation ranging from 0 (fully manual) to 5 (fully autonomous). Level 2 covers partial driving automation, which includes advanced driver-assistance systems (ADAS). In level 2 automation, the vehicle can control both steering and accelerating/decelerating, but a human still monitors the driving tasks and can take control of the vehicle at any time. Level 3 covers conditional driving automation, where the vehicle can detect the environment around the vehicle and make informed decisions on accelerating, lane change, etc. Level 3 automation still requires that a human be able to override and take control if the automation system is unable to execute the task. The operational design domain (ODD) safety concept ensures a driver assistance feature providing automation higher than Society of Automotive Engineers Level 2 (SAE L2+) is acceptably safe by reducing the exposure to challenging operational situations.
In various embodiments, an advanced driver-assistance systems (ADAS) feature activation control system may be provided that may overcome constraints of existing solutions, including lack of positioning accuracy and unknown quality of digital maps. In an example, an operational design domain aggregator (ODDA) may be implemented to determine whether it is safe to activate and/or maintain activation of an ADAS automation feature. In various embodiments, the ODDA may overcome the constraints of existing solutions through the use of on-board sensing functionality of a vehicle. The ODDA may utilize both primary information and secondary information channels to detect upcoming unsafe operational situations. As used herein, unsafe is used to refer to operational situations that are outside the capabilities of the ADAS feature where activation is being restricted.
Information about upcoming operational situations may be divided into a primary information path (or channel) and a secondary information path (or channel). The primary information about upcoming operational situations that the system may not be able to handle safely is generally obtained from a digital map (or electronic horizon). The secondary and/or redundant information about upcoming operational situations is generally obtained from the on-board vehicle sensors (e.g., forward looking camera (FLC), forward looking radar (FLR), front corner/side radar (FCSR), etc.). The secondary channel of information is generally able to identify upcoming unsafe operational situations that the primary channel may be unable to identify and/or report. In addition, using the secondary channel information, the ODDA may be able to verify the presence of upcoming unsafe operational situations reported by the primary channel.
The primary channel generally uses digital map data to identify upcoming operational situations that may be judged to be unsafe. In an example, operational situations that may be judged to be unsafe may include, but are not limited to, lack of a median barrier to oncoming traffic, lack of a guardrail to an off-road area, presence of an intersection, presence of a road legally accessible to vulnerable road users (VRUs), presence of tollbooths and/or border stations, etc. The term vulnerable road users is generally used to identify a category of road users that would present a heightened level of risk for autonomous features (e.g., pedestrians, bicyclists, etc.). In an example, a high-definition (HD) map of unknown quality may reside on a memory unit in the vehicle. Satellite-based and potentially inaccurate positioning is generally used to query the on-board HD map to identify a horizon (e.g., upcoming travel environment) of the vehicle. The potentially inaccurate HD map horizon is generally made available via a map interface to the ODDA and an activation monitor for processing.
The secondary channel may utilize on-board sensors (e.g., FLC, FLR, FCSR, LiDAR, millimeter radar, sonar (ultrasonic), etc.) to determine in real time whether the upcoming operational situation is safe. Static perception, which fuses the information such as image data from the FLC sensor and point cloud data from the FLR and FCSR sensors to report on the presence of various static and dynamic objects to the activation monitor, is generally part of the secondary channel.
The activation monitor generally consumes information from both the primary channel and the secondary channel to assess the static ODD conditions in real time. The static ODD assessment generated by the activation monitor is generally reported to the ODDA.
The FLC and FLR sensors may also report status information (e.g., internal error, signal availability, signal confidence, etc.) directly to the ODDA. A localization module also consumes information from both the primary and secondary channels to confirm the location of the vehicle in real time. The localization module generally reports the confirmed localization to the ODDA and the vehicle location to the map interface.
In various embodiments, the ODDA may be implemented at Automotive Safety Integrity Level (ASIL) A, with a potential to go up to ASIL B. ASIL is a risk classification scheme defined by the ISO 26262—Functional Safety for Road Vehicles standard, which is an adaptation of the Safety Integrity Level (SIL) used in IEC 61508 for the automotive industry. The ASIL classification helps define the safety criteria necessary to be in line with the ISO 26262 standard. The ASIL is established by performing a risk analysis of a potentially hazardous scenario by looking at the Severity, Exposure, and Controllability of the vehicle operating scenario. The safety goal for the potentially hazardous scenario in turn carries the ASIL requirements. The ASILs range from ASIL D, representing the highest degree of automotive hazardous scenario and highest degree of rigor applied in the assurance of no unacceptable risk from the hazardous scenario, to QM, representing applications with no automotive hazardous scenarios and, therefore, no safety requirements to manage under the ISO 26262 safety processes. The level QM, referring to “Quality Management”, means that risk associated with a hazardous event is not unreasonable and does not therefore require safety measures in accordance with ISO 26262. The intervening levels (ASIL C, ASIL B, and ASIL A) are simply a range of intermediate degrees of hazardous scenarios and degrees of assurance required.
The ISO 26262 standard defines functional safety as “the absence of unreasonable risk due to hazards caused by malfunctioning behavior of electrical or electronic systems.” ASILs establish safety requirements, based on the probability of the hazardous scenario and severity of harm, for automotive components to be compliant with ISO 26262. Systems like airbags, anti-lock brakes, and power steering require an ASIL D grade, the highest rigor applied to safety assurance-because the risks associated with their failure are the highest. On the other end of the safety spectrum, components like front lights require only an ASIL A grade. Headlights and brake lights generally would be ASIL B, while automatic emergency brake systems would generally be ASIL C due to the risks associated with the unintended deceleration. Implementing the ODDA at ASIL A may ensure that a feature is active only when the static ODD conditions are met. In an example, the ODDA and a mode manager for the feature may be the only functions in the ODD solution implemented as ASIL. All other functions may be non-ASIL or quality management (QM).
At any given time, the ODDA may perform four checks: (i) whether Localization Confirmed reported by a localization module is True; (ii) whether Map Static ODD Information reported by a map interface reports nominal values for all the desired operational situations, (iii) whether Static ODD Assessment reported by an activation monitor reports nominal values for the desired operational situations; and (iv) whether FLC and FLR do not report internal error, signal unavailability, or low signal confidence. In an example, failure of any one of the checks may result in the ODDA reporting Static ODD Permission as False. In another example, any deviation between the primary channel and the secondary channel (e.g., map reporting presence of safety barriers but sensor fusion reporting missing safety barriers, etc.) may result in deactivation along with error reporting to a fault and diagnostic handling module. The ODDA also may perform latent fault checks against the map, the vision-based sensor, and the radar-based sensors. The ODDA may use the fault check information for error reporting to the fault and diagnostic handling module. The fault and diagnostic handling module is outside the scope of the invention and, therefore, is not shown in the function design.
Referring to
The circuit 91 may implement an activation monitor. The circuit 91 may be configured to generate a signal (e.g., STATIC ODD ASSESSMENT). The signal STATIC ODD ASSESSMENT may be configured to communicate results of a static operational design domain (ODD) assessment performed by the circuit 91. The signal STATIC ODD ASSESSMENT may be presented to a first input of the ODDA 100. The circuit 91 generally consumes information from both a primary information channel and a secondary information channel to assess static ODD conditions in real time. The static ODD assessment by the circuit 91 is generally reported to the ODDA 100.
The circuit 93 may implement a localization circuit. The circuit 93 may be configured to generate a signal (e.g., VEHICLE LOCATION CONFIRMED). The signal VEHICLE LOCATION CONFIRMED may be configured to communicate results of a localization process performed by the circuit 93. The signal VEHICLE LOCATION CONFIRMED may be presented to a second input of the ODDA 100. The circuit 93 generally consumes information from both the primary information channel and the secondary information channel to confirm the vehicle location in real time. The circuit 93 reports the confirmed localization to ODDA 100.
The circuit 95 may implement a map interface. The circuit 95 may be configured to generate a signal (e.g., MAP STATIC ODD INFO). The signal MAP STATIC ODD INFO may be configured to communicate ODD values determined for desired operational situations implemented based on data contained in an HD map. The signal MAP STATIC ODD INFO may be presented to a third input of the ODDA 100. The circuit 95 generally obtains map data from the HD map based on a location of the vehicle reported by the circuit 93.
The circuit 97 may provide the status of various sensors. The circuit 97 may present a number of sensor status signals to a fourth input of the ODDA 100. In an example, the sensor status signals may report internal errors, signal availability, and/or signal confidence directly to the ODDA 100.
The circuit 80 may implement a feature mode manager. In an example, the circuit 80 may be configured to manage one or more ADAS automation features (or functions). In an example, the circuit 80 may implement an autopilot mode manager. In an example, the circuit 80 may be configured to control activation of the one or more ADAS automation features (or functions) based on a signal STATIC ODD PERMISSION. In some embodiments, the circuit 80 may also be configured to receive an optional signal STATIC ODD DEACTIVATION REASON from the ODDA 100.
In an example, the ODDA 100 may be implemented at automotive safety integrity level (ASIL) A. The ODDA 100 may be configured to generate the signals STATIC ODD PERMISSION and STATIC ODD DEACTIVATION REASON in response to the signal STATIC ODD ASSESSMENT, the signal VEHICLE LOCATION CONFIRMED, the signal MAP STATIC ODD INFO, and the sensor status signals 97. The ODDA 100 may present the signal STATIC ODD PERMISSION (and the signal STATIC ODD DEACTIVATION REASON when implemented) to an input of the circuit 80. When implemented at automotive safety integrity level (ASIL) A, the ODDA 100 generally ensures that the one or more features managed by the circuit 80 are active only when the static ODD conditions are met. In an example, the only functions in the ODD solution implemented at ASIL may include the circuit 80 and the ODDA 100. All other functions may be non-ASIL or quality management (QM). At any given time, the ODDA 100 may perform checks for the four following conditions:
Referring to
The primary information about upcoming operational situations that the system may not be able to handle safely generally comes from a digital map (or electronic horizon). Secondary and redundant information about upcoming operational situations generally comes from on-board sensors (e.g., front looking camera (FLC), front looking radar (FLR), and front corner/side radars (FCR/FSR or FCSR)). The secondary channel of information is generally able to identify upcoming unsafe operational situations that the primary channel is unable to identify and/or report. In addition, the secondary channel may be used to verify the presence of upcoming unsafe operational situations reported by the primary channel.
The map-based operational situation information obtained from the primary channel 202 and the on-board sensor-based operational situation information obtained from the secondary channel 204 may be presented to inputs of the activation monitor 91 and inputs of the localization circuit 93. The activation monitor 91 may be configured to generate the signal STATIC ODD ASSESSMENT in response to the map-based operational situation information and the on-board sensor-based operational situation information. The circuit 93 may be configured to generate the signal VEHICLE LOCATION CONFIRMED in response to the map-based operational situation information and the on-board sensor-based operational situation information.
The primary channel 202 generally uses digital maps to identify upcoming operational situations that are judged to be unsafe. In an example, the unsafe operational situations may include, but are not limited to, (i) lack of median barrier to oncoming traffic, (ii) lack of guardrail to prevent going off-road, (iii) presence of an intersection, (iv) presence of a road legally accessible to vulnerable road users (VRUs), and (v) presence of tollbooths and/or border stations. The term VRUs may be used to identify a category of road users including, but not limited to, pedestrians, bicyclists, etc. In an example, a high-definition (HD) map of unknown quality may reside on a memory unit in a vehicle. Satellite-based and potentially inaccurate positioning is generally used to query the on-board HD map to identify the upcoming travel environment (horizon). The potentially inaccurate HD map horizon is generally made available via the map interface 95 to the activation monitor 91 for processing.
The secondary channel 204 generally uses on-board sensors (e.g., the FLC, FLR, and FCSR) to determine in real time whether the upcoming operational situation is safe. Static perception, which fuses the information from the FLC and FLR sensors to report on the presence of various static and dynamic objects to the activation monitor 91, is generally part of the secondary channel 204. The activation monitor 91 generally consumes information from both the primary channel and the secondary channel to assess the static ODD conditions in real time. The static ODD assessment generated by the activation monitor 91 is generally reported to the ODDA 100. The FLC and FLR sensors may also report internal error, signal availability, and signal confidence directly to the ODDA 100. The localization module 93 also consumes information from both the primary and secondary channels to confirm the location of the vehicle in real time. The localization module 93 generally reports whether the localization of the vehicle is confirmed to the ODDA 100.
The secondary channel uses the FLC sensor, FLR sensor, and FCSR sensors to determine in real time whether the upcoming operational situation is safe. Static perception is part of the secondary channel and it fuses the information from the FLC sensor and the FLR sensor to report on the presence of various static and dynamic objects to the activation monitor 91. The FLC sensor and the FLR sensor also report internal error, signal availability, and signal confidence directly to the ODDA 100.
Referring to
The circuit 210 may have an input that may receive raw position information (e.g., latitude, longitude, etc.) from the satellite-based positioning circuit 212. In response to the raw position data, the circuit 210 may be configured to present map horizon data to an input of the localization circuit 93 and an input of the map interface circuit 95. The circuit 212 may be configured to also present the raw position data to the localization circuit 93. The localization circuit 93 may be configured to present vehicle location information to the map interface circuit 95. The map interface circuit 95 may be configured to generate map-based static ODD information in response to the map horizon data received from the HD map 210 and the vehicle location information received from the localization circuit 93. The map interface circuit 95 may be configured to present the map-based static ODD information to an input of the activation monitor 91 and an input of the ODDA 100. The circuits 95, 210, and 212 are shaded to indicate a form/function that is used in the primary information path. The circuit 91 and 93 are partially shaded to indicate a form/function that is used in both the primary information path and the secondary information path.
The secondary information path (or channel) 204 may comprise a number of on-board sensors of the vehicle. The number of on-board sensors may include, but is not limited to, a forward looking camera (FLC) 220, front corner/side radar (FCR & FSR or FCSR) 222, and forward looking radar (FLR) 224. The forward looking camera (FLC) 220 may present a signal (e.g., VISION DETECTIONS) communicating vision detections to an input of the localization circuit 93. The forward looking camera (FLC) 220 may also present the signal VISION DETECTIONS communicating vision detections to an input of a perception module (or circuit) 99. The front corner/side radar (FCSR) 222 may present a signal (e.g., RADAR DETECTIONS) communicating radar detections to an input of the circuit 93. The forward looking radar (FLR) 224 may present a signal communicating radar detections to a second input of the perception module 99. The localization circuit 93 may be configured to generate the vehicle location information presented to the map interface 95 and the signal VEHICLE LOCATION CONFIRMED in response to the raw position data received from the satellite-based positioning circuit 212, the map horizon data received from the HD map 210, the vision detections received from the FLC 220, and the radar detections received from the FCSR 222. The localization circuit 93 may be configured to present the signal VEHICLE LOCATION CONFIRMED to an input of the ODDA 100.
The perception module 99 may be configured to generate signals communicating static and dynamic object reporting in response to the vision detections from the forward looking camera (FLC) 220 and the radar detections from the forward looking radar (FLR) 224. The static and dynamic object reporting signals generated by the perception module 99 may be presented to an input of the activation monitor 91. The activation monitor 91 may be configured to generate the signal STATIC ODD ASSESSMENT in response to the static and dynamic object reporting signals received from the static perception module of the perception module 99 and the map static ODD information received from the map interface 95. The activation monitor 91 may be configured to present the signal STATIC ODD ASSESSMENT to an input of the ODDA 100.
In an example, the perception module 99 may be implemented as a software component. In an example, the perception module 99 may be utilized in a SAE L2+ automation feature such as Hyper Traffic Jam Assistance (HTJA). In various embodiments, the perception module 99 may utilize image data from the FLC 220 and point cloud data from the FCSRs 222a-222b and FLR 224 to (i) detect the presence of barriers, intersections, VRUs, tollbooths, and border stations, and (ii) analyze oncoming traffic, which may be further utilized by the activation monitor 91 to deactivate the automation feature (e.g., HTJA, etc.) as defined by the safety goals. The perception module 99 generally performs sensor fusion of the on-board sensors as part of the secondary channel. The perception module 99 generally fuses the image data from the FLC 220 and the point cloud data from the FCSRs 222a-222b and FLR 224 to (i) detect the presence of barriers, intersections, VRUs, tollbooths, and border stations, (ii) track objects (or targets) in the environment around the vehicle, and (iii) analyze oncoming traffic.
In an example, the perception module 99 may detect objects in the surrounding environment of the vehicle based on the on-board sensor data. In an example, the objects detected by the perception module 99 may be used as a cross-check on objects identified in the map data. For example, the map data may describe roadways and segments thereof and may also describe buildings and other items or objects (e.g., lampposts, crosswalks, curbs, etc.), location and directions of traffic lanes or lane segments (e.g., the location and direction of a parking lane, a turning lane, a bicycle lane, or other lanes within a particular roadway), traffic control data (e.g., the location and instructions of signage, traffic lights, or other traffic control devices), and/or any other map data that provides information to assist the ADAS system 90 in comprehending and perceiving the surrounding environment of the vehicle.
In an example, the perception module 99 may be configured to determines a state for one or more of the objects in the surrounding environment of the vehicle. In an example, the state generally describes a current state (or features) of the one or more objects. In an example, the state for each object may describe an estimate of a current location (or position) of each object, a current speed (or velocity) of each object, a current acceleration of each object, a current heading of each object, a current orientation of each object, a size/shape/footprint (e.g., as represented by a bounding shape such as a bounding polygon or polyhedron) of each object, a type/class (e.g., vehicle, pedestrian, bicycle, etc.), a yaw rate of each object, a distance from the vehicle of each object, a minimum path to interaction of each object with the vehicle, a minimum time duration to interaction of each object with the vehicle, and/or other state information. In another example, the perception module 99 may also be configured to detect object free areas (e.g., as represented by a bounding shape such as a bounding polygon or polyhedron). In another example, the perception module 99 may be configured to update state information for each object over time. Thus, the perception module 99 may detect and track objects, such as other vehicles, that are near the ego vehicle over time.
In an example, the perception module 99 may comprise a number of modules including, but not limited to, an object free area (OFA) module (or circuit), a target tracking (TT) module (or circuit), and a static perception (SP) module (or circuit). In another example, the perception module 99 may also comprise road estimation and electronic horizon reconstruction modules (not shown), which may be used to produce self-generated map information from the on-board sensor-based information. In an example, the object free area module may be configured to detect object free areas. In an example, the object free area module may have a polygon output that may present a bounding shape such as a bounding polygon or polyhedron representing each object free area. In an example, the target tracking module may be configured to detect and track objects, such as other vehicles, that are near the ego vehicle over time. The target tracking module may have an output that may present a target tracking output. In an example, the polygon output of the OFA module and the target tracking output of the target tracking module may be presented to inputs of the static perception module. The static perception module my be configured to generate the static and dynamic object reporting signals that are presented to the ODDA 100 in response to the polygon output received from the OFA module and the target tracking output received from the target tracking module.
For motion assessment, the static perception module may use object information from the target tracking output of the target tracking module combined with analysis of the object free area (OFA) polygon output of the OFA module in order to provide the direction of the traffic and a confidence of the detection. For detecting intersections, VRU's, tollbooths, and border stations, the static perception module generally utilizes the object information from the target tracking output combined with analysis of the OFA polygon output to provide intersection type, VRU type, VRU location, tollbooth location, border station location, and intersection/VRU/tollbooth/border station confidence. For barrier detection, the static perception module may utilize a barrier output using radar measurements from the target tracking module combined with road edge and static objects information from the FLC 220 to provide barrier segment data as an output that includes location of the segments, number of segments, and confidence.
The ODDA 100 may also receive sensor status signals from the forward looking camera (FLC) 220 and the forward looking radar (FLR) 224. The ODDA 100 is generally configured to generate the signals STATIC ODD PERMISSION and, optionally, STATIC ODD DEACTIVATION REASON in response to the map-based static ODD information, the signal VEHICLE LOCATION CONFIRMED, the signal STATIC ODD ASSESSMENT, and the sensor status signals.
Referring to
The forward looking camera (FLC) 220 is generally used to detect and identify objects and road features in front of the vehicle 50. In an example, the forward looking camera (FLC) 220 may be configured to provide stereoscopic vision with a 100-degree field of view (FOV). In an example, the forward looking camera (FLC) 220 may be used to detect road markings (e.g., lane markings, etc.), road signs, traffic lights, structures, etc. The corner/side radar sensors 222a-222d and the forward looking radar (FLR) sensor 224 (and LIDAR and/or sonar sensors when present) are generally used to detect and track objects. In an example, each of the corner/side radar sensors 222a-222d may have a 140-degree FOV. In an example, the forward looking radar (FLR) sensor 224 may have two FOVs, an 18-degree FOV for long range sensing and a 90-degree FOV for short range sensing. The IMU 230 generally reports the orientation, angular velocity and acceleration, and forces acting on the vehicle 50.
In an example, the HD map receiver 210, the GNSS receiver 212, the FLC 220, the FCSRs 222a-222b, the RCSRs 222c-222d, the FLR 224, and the IMU 230 may be connected to the system 90. In an example, the HD map receiver 210, the GNSS receiver 212, the FLC 220, the FCSRs 222a-222b, the RCSRs 222c-222d, the FLR 224, and the IMU 230 may be connected to the system 90 via one or more vehicle buses of the vehicle 50. In another example, the HD map receiver 210, the GNSS receiver 212, the FLC 220, the FCSRs 222a-222b, the RCSRs 222c-222d, the FLR 224, and the IMU 230 may be connected to the system 90 via a wireless protocol. In an example, the FLC 220 may convey surrounding road information (e.g., lane widths, marker types, lane marker crossing indications, and video) to the system 90. The GNSS receiver 212 may convey position data (e.g., latitude value, longitude value, adjustment information and confidence information) to the system 90. The HD map receiver 210 may transfer map data to the system 90.
The FLC 220 may implement an optical sensor. In various embodiments, the FLC 220 may be an optical camera. The FLC 220 is generally operational to provide the surrounding road information (or image data) to the system 90. The road information may include, but is not limited to, lane width data, marker type data, lane change indicators, and video of a roadway ahead of the vehicle 50 within the field of view of the FLC 220. In various embodiments, the FLC 220 may be a color camera. The color may be useful for distinguishing between solid-yellow lane markers (e.g., leftmost lane markers) from solid-white lane markers (e.g., rightmost lane markers). In various embodiments, the FLC 220 may provide an estimated lane width for at least a current lane in the center of the field of view of the FLC 220. In some embodiments, the FLC 220 may provide estimated lane widths for the lane(s) neighboring the center lane. In other embodiments, the FLC 220 may provide estimated lane widths for all of the lanes within the field of view of the FLC 220. The lane widths may be determined using standard image recognition methods and standard analysis methods implemented in the FLC 220. The FLC 220 may also identify all lane markers within the field of view of the FLC 220. When the FLC 220 crosses over a lane marker, the FLC 220 may notify the system 90 that a lane change is occurring. Identification of the lane markers and the lane changes may be determined using standard image recognition methods and standard analysis methods implemented in the FLC 220. The FLC 220 may transfer the road information to the system 90 via a vehicle bus or a wireless protocol.
One or more other types of sensors may be used in conjunction with the FLC 220. Example sensors may include, but are not limited to, radar sensors, light detection and ranging (LiDAR) sensors, inertial sensors, thermal imaging sensors, and/or acoustic sensors. Some of the sensors may detect objects on the side of the road to provide estimations of a left boundary and a right boundary of the road. From the left boundary and the right boundary, a width of the road may be calculated. From the calculated width, an estimation of how may lanes probably fit within the width may be made based on a standard lane width. Thereafter, the sensors may estimate the current lane that the vehicle 50 occupies based on the relative distances of the sensors on the vehicle 50 to the left boundary and the right boundary of the road and the estimated number of lanes. Lane crossovers may be determined by the sensors based on the estimated numbers of lanes and changes in the relative distances to the left boundary and/or the right boundary.
The system 90 may implement a control circuit (e.g., an electronic control unit). The system 90 is generally operational to keep track of the current lane that the vehicle 50 occupies and correct the current position of the vehicle 50 to a center of the current lane. The tracking may be based on the map data received from the HD map receiver 210, the satellite position data received in the GNSS receiver 212, the road information received in the vision detections from the FLC 220, the radar detections received from the FCSRs 222a-222b and the FLR 224, and the vehicle orientation and forces received from the IMU 230. The satellite position data may include an adjustment value and a corresponding confidence value.
The HD map receiver 210 may implement a radio-frequency receiver. The HD map receiver 210 may be operational to receive the map data from an antenna (not shown). The map data may be converted to a digital form and presented to the system 90.
The GNSS receiver 212 may implement a satellite-navigation device. In various embodiments, the GNSS receiver 212 may include a Global Positioning System (GPS) receiver. Other types of satellite-navigation devices may be implemented to meet the design criteria of a particular application. The GNSS receiver 212 is generally operational to provide the latitude data and the longitude data of the vehicle 50 based on the GNSS signals received from a number of satellites. The GNSS receiver 212 may also be operational to adjust the latitude data and the longitude data based on the adjustment value and a corresponding confidence value received from the system 90. The confidence value may have a range from zero (e.g., unreliable) to one (e.g., reliable). If the confidence value is above a high threshold (e.g., >0.7), the GNSS receiver 212 may correct the latitude data and the longitude data per the adjustment value. If the confidence value is below a low threshold (e.g., <0.3), the GNSS receiver 212 may ignore the adjustment value. If the confidence value is between the high threshold and the low threshold, the GNSS receiver 212 may apply a correction to both the latitude data and the longitude data that is a linear weighting based on the degree of confidence.
Referring to
The process 300 generally starts in the step 302 and moves to the step 304. In the step 304, the process 300 may receive environment information from on-board sensors of the vehicle and determine whether the sensor data is valid. The process 300 may then move to the decision step 306. In the decision step 306, the process 300 determines whether the information received from the on-board sensors is valid. In an example, sensor status signals may be checked to determined whether the sensors are operating properly. When the sensor information is determined to be not valid, the process 300 may move to the step 308 and report an error. When the sensor information received from the on-board sensors is determined to be valid, the process 300 may begin processing the step 310 and the step 312. The steps 310 and 312 may be performed concurrently.
In the step 310, the process 300 may query the high-definition (HD) map database. In the step 312, the process 300 may detect and track static and dynamic objects using image data from the FLC 220 and point cloud data from the FCSRs 222a-222b and the FLR 224. The process 300 may then begin processing in the steps 314, 316, and 318. The processing performed in the steps 314, 316, and 318 may be performed concurrently. In the step 314, the process 300 may perform high definition map-based operational design domain assessments. In the step 316, the process 300 may confirm localization by comparing scene information from the high definition map and static objects detected using the on-board sensors in the step 312. In the step 318, the process 300 may perform camera and radar sensor fusion operations and perform sensor-based operational design domain assessments.
When the process 300 has confirmed localization in the step 316, the process 300 may move to the decision step 320. In the decision step 320, the process 300 may determine whether the localization has been confirmed. When the localization is not confirmed, the process 300 may move to the step 322 and report an error. In an example, the localization may not be confirmed when the static objects detected by the on-board sensors do not agree with the information retrieved from the high definition map. When localization is confirmed, the process 300 may move to the step 324. In the step 324, the process 300 may take results from the steps 314 and 318 to determine whether or not to offer feature activation or whether or not to keep a feature active. In an example, the process 300 may compare the HD map-based and on-board-sensor-based operational design domain assessments to determine whether or not to offer feature activation or whether or not to keep a feature active. When the process 300 has finished determining whether to offer feature activation or to keep the feature active, the process 300 may move to the step through 326 and terminate.
Referring to
In the step 404, the process 400 may collect a map query response. In the decision step 406, the process 400 determines whether the response is valid. In an example, the process 400 may check whether the map interface 95 has indicated any errors. In another example, the process 400 may check for agreement between the map data and on-board sensor data. When the response is not valid, the process 400 may move to the step 408 and report an error. When the response is valid, the process 400 may move to the step for 410.
In the step 410, the process 400 may identify select ODD parameters for assessment, then move to the step 412. In the step 412, the process 400 may make the select ODD parameters available for assessment. The process 400 may then move to the step 414 and terminate.
Referring to
In the step 504, the process 500 may obtain information for confirming the location of the vehicle. In an example, the step 504 may comprise multiple steps 504a-504c, which may be performed concurrently (in parallel or simultaneously). In the step 504a, the process 500 may receive vehicle location information from the satellite-based positioning block 212. In the step 504b, the process 500 may receive static object information from the FLC 220. In the step 504c, the process 500 may receive static object information from the FCSRs 222a-222b and the FLR 224. When the information has been received, the process 500 may move to the steps 506 and 508, which may be performed concurrently (in parallel or simultaneously).
In the step 506, the process 500 may query the HD map 210 to identify static objects around the vehicle at the location indicated by the satellite-based position information received in step 504a. In the step 508, the process 500 may fuse the camera and radar information received in the steps 504b and 504c, respectively, to identify static objects around the vehicle. The process 500 may then move to the step 510. In the step 510, the process 500 may compare the static objects identified by the HD map 210 with the static objects identified using the camera and radar information, and move to the step 512.
In the step 512, the process 500 may determine whether there is a match between the static objects identified by the HD map 210 and the static objects identified using the camera and radar information. In an example, the process 500 may utilize a calibratable (or programmable) tolerance (or threshold) to determine a quality of the match. When a match is not found (e.g., within the calibratable tolerance), the process 500 may move to the step 514 and report an error. When a match is found (e.g., within the calibratable tolerance), the process 500 may move to the step 516. In the step 516, the process 500 may confirm localization (e.g., set the signal VEHICLE LOCATION CONFIRMED to TRUE) and report the location (e.g., latitude, longitude, etc.) of the vehicle. The process 500 may then move to the step 518 and terminate.
Referring to
In the step 604, the process 600 may fuse camera and radar information to identify static objects around the vehicle and assess an effect the presence or absence of static objects detected has on the operational design domain. In the decision step 606, the process 600 determines whether the assessment is valid. For example, the process 600 may check whether the camera and/or radar sensors reported an internal error, or check the signal availability and/or signal confidence reported. When the assessment is not valid, the process 600 may move to the step 608 and report an error. When the assessment is valid, the process 600 may move to the step 610. In the step 610, the process 600 may report the ODD assessment and measurements of the static objects from the perception module 99 to the activation monitor 91. The process 600 may then move to the step 612 and terminate.
Referring to
In the step 704, the process 700 may compare the HD map based ODD assessment and the sensor fusion based ODD assessment. In an example, a highway environment may be considered safe for hands-free driving, while an urban environment may be considered unsafe for hands-free driving. In the decision step 706, the process 700 determines whether the ODD assessments based on the HD map information and the sensor fusion information match. When the ODD assessments match, the process 700 may move to the step 708, to report that the ADAS feature activation may be offered or maintained. When the ODD assessments do not match, the process 700 may move to the decision step for 710.
In the decision step 710, the process 700 may determine whether the ADAS feature is active. When the ADAS feature is active, the process 700 may move to the step 712 to request deactivation of the ADAS feature and report a reason for deactivation. When the ADAS feature is not active, the process 700 may move to the step 714 to request the ADAS feature not be offered and report a reason for not offering activation of the ADAS feature. The process 700 may then move from either the steps 708, 712, and 714 to the step 716 and terminate.
Referring to
In an example, an approach may start small with respect to a feature set and expand the ODD strategy incrementally over time with confidence (data). In an example, the vehicle safety system 802 including an operational design domain aggregator (ODDA) 100 in accordance with an embodiment of the invention may rely on monitoring the ODD strategy at fleet level using on-board sensing and verifying the ODD strategy in real time. The ODD monitor 804 may reside at a central location (e.g., cloud, vehicle manufacturer, etc.). The ODD monitor 804 may verify information about ODD violations in real time against an exposure threshold determined at design time (e.g., quantitative target determined based on an accident database, field monitoring, etc). When the ODDA 100 detects a change in reality (e.g., maps against on-board sensing, etc.), the ODDA 100 may feedback/update the HD map 210 in real time. In an example, the ODD monitor 804 may disable a feature across fleets when overall exposure crosses a threshold for each hazardous event. In an example, there may also be an option to share the vehicle-sourced map data with the rest of the fleet (e.g., over-the-air (OTA) broadcast, etc.). Hence, exposure reduction at fleet level may become ASIL (safety critical) compliant.
The system 802 may include the HD map 210, the global navigation satellite system (GNSS) receiver 212, the on-board sensing functions 204, the operational design domain aggregator (ODDA) 100, and the feature controller of the vehicle platform 80. In an example the HD map 210 may present information to an input of the ODDA 100. The satellite-based positioning block 212 may present geo-positioning information to another input of the ODDA 100. Static and dynamic environmental detection and tracking information from the camera and radar sensors of on-board sensing block 204 may be presented to a third input the ODDA 100. The ODDA 100 may present a feature activation request to the feature controller of the vehicle platform 80.
Customer vehicles and test fleets incorporating the vehicle safety system 802 may be configured to provide feedback to the central fleet level ODD exposure monitor 804. In an example, the ODDA 100 may receive feature activation configuration signals from the fleet level ODD exposure monitor 804. The feature activation signals may provide the ODDA 100 with particular features which are allowed to be activated or prohibited from being activated. The ODDA 100 may provide reporting of ODD violations to the fleet level ODD exposure monitor 804. In an example, the fleet level ODD exposure monitor 804 may provide feedback to the high definition map provider to update the HD map 210 based on the feedback from the ODDA 100. In another example, the ODDA 100 may update the HD map stored in the vehicle. In another example, the ODDA 100 may be configured to produce a self-generated map 806 using on-board sensors in places with limited or no HD map availability. In an example, the self-generated map 806 may be stored in memory of the ASDM ECU 90.
The ODD is generally specified to enable the safe deployment of automated driving systems. The operational design domain generally comprises the static and dynamic attributes within which an automated driving system is designed to function safely. The ODD generally includes, but is not limited to, environmental, geographical, and time-of-day restrictions, and/or the requisite presence or absence of certain traffic or roadway characteristics. In an example, environmental considerations may include, but are not limited to, weather, illumination, connectivity, etc. In an example, geographical considerations may include, but are not limited to, zones, drivable areas, intersections, structures near roads, fixed road structures, temporary road structures, etc. In an example, dynamic elements/considerations may include, but are not limited to, traffic, pedestrians, cyclists, speed, etc.
In an example, raw sensor data may comprise one or more of image data, speed data, and acceleration data from one or more on-board sensors. The image data may comprise images obtained from various cameras (e.g., forward looking camera, surround view cameras, etc.) on the vehicle. The speed and acceleration data may be obtained by tapping into a Controller Area Network (CAN) bus of the vehicle. In an example, object data may comprise one or more of position and/or type of surrounding objects, lane markings, traffic lights and/or signs, and road conditions. In an example, tactical information may comprise one or more of map (electronic horizon) information and high level navigation information. In an example, map information may comprise current traffic rules, road geometry, allowable speed, highway exits, roundabouts, distances to intersections, etc.
In an example, the cruising features roadmap 900 may be divided into a number of regions based on vehicle speed and advanced driver-assistance systems (ADAS) features/functions level. In an example, the cruising features roadmap 900 may be implemented as a grid with one axis representing vehicle speed and another axis representing feature level. In an example, the vehicle speed axis may be divided into two vehicle speed ranges (e.g., low speed and medium/high speed) and the feature level axis may be divided into two feature levels (e.g., Structured ODD and Unstructured ODD), producing four operational regions 902, 904, 906, and 908. In an example, the operational region 902 may represent features operating at low vehicle speed with structured ODD, the operational region 904 may represent features operating at low vehicle speed with unstructured ODD, the operational region 906 may represent features operating at medium-to-high vehicle speed with structured ODD, and the operational region 908 may represent features operating at medium-to-high vehicle speed with unstructured ODD. In an example, the region 902 may include a traffic jam assistance feature, the region 904 may include a parking assistance feature, the region 906 may include a feature such as autopilot for highway environments, and the region 908 may include an autopilot feature for urban environments.
In an example, the features operations may move from low speed to medium-to-high speed or from structured ODD to unstructured ODD over time (as indicated by the arrows labeled TIME). In each of the regions 902-908, the features may be introduced as hands on operation and transition over time to hands off operation. Similarly, the features may be introduced as hands on and low vehicle speed and/or structured ODD operation and transition over time to hands off and medium-to-high speed and/or unstructured ODD operation.
In an example, various advanced driver-assistance systems (ADAS) features/functions may transition from hands-on to hands-off in various applications over time. In an example, a structured operational design domain may be applied to functions utilized in low speed applications, such as in a traffic jam, and in medium/high speed application, such as highway driving. In an example, an unstructured operational design domain may be applied to functions utilized in low speed applications, such as parking, and in medium/high speed application, such as urban driving.
In an example, various advanced driver-assistance system features/functions may transition from hands-on to hands-off in various roll-out steps. In a first step occurring at design time, quantitative targets may be set for each hazardous event (e.g., exposure to pedestrians <1/100 hrs., etc). A second step may occur at run time, where on-board sensing at fleet level may be used to (i) detect loss of physical separation (vision/radar sensing), (ii) detect traffic lights (vision sensing), (iii) detect oncoming traffic (vision/radar sensing), and/or (iv) detect pedestrians (vision/radar sensing). In another step, the feedback from test fleets (both prior to and after launch) may be used to verify/update the quantitative targets, invalidate maps, etc. In another example, a feature may be deployed in a “shadow mode” of a target ODD to evaluate effectiveness of the ODD safety concept to ensure exposure to critical situations for supervised driving is at acceptably low level. In the shadow mode, an ADAS feature may be operated in parallel with a human driver operating the vehicle, without being able to affect the operation of the vehicle. In yet another step, hands-off driving may be unlocked (relaxed ODD restrictions) for a new target ODD based on shadow mode data (e.g., actual exposure<target exposure). In still another example, probe-sourced data from on-board sensing may be fed back to improve and/or validate incoming HD map integrity in real time. In still another step, a hands-off driving feature may be locked via signal from the cloud, with the vehicle (or fleet) falling back to hands-on driving anytime an exposure to critical operational situation goes above a target risk threshold (e.g., actual exposure>target exposure). The various steps described above may be repeated to expand a capability of the hands-free feature (e.g., from 80 kph to 100 kph, etc.) and cover a new target deployment area over time (e.g., from highway to urban roads, etc.). Over time, a feature may be expanded to allow limited eyes-off driving (e.g., unsupervised ODD) based on evidence of low residual exposure to violating hazardous events in constrained ODD.
Referring to
In an example, the ECU 1000 may be connected to a block (or circuit) 1002. The circuit 1002 may implement an electronic bus. The electronic bus 1002 may be configured to transfer data between the ECU 1000 and the HD map receiver 210, the GNSS receiver 212, the forward looking camera (FLC) 220, the front corner/side radar (FCSR) sensors 222, the forward looking radar (FLR) sensor 224, and/or the inertial measurement unit 230. In some embodiments, the electronic bus 1002 may be implemented as a vehicle Controller Area Network (CAN) bus. The electronic bus 1002 may be implemented as an electronic wired network and/or a wireless network. Generally, the electronic bus 1002 may connect one or more components of the vehicle 50 to enable a sharing of information in the form of digital signals (e.g., a serial bus, an electronic bus connected by wiring and/or interfaces, a wireless interface, etc.).
The ECU 1000 generally comprises a block (or circuit) 1020, a block (or circuit) 1022, a block (or circuit) 1024, a block (or circuit) 1026, and a block (or circuit) 1028. The circuit 1020 may implement a processor. The circuit 1022 may implement a communication port. The circuit 1024 may implement a filter. The circuit 1026 may implement a clock. The circuit 1028 may implement a memory. Other blocks (not shown) may be implemented (e.g., I/O ports, power connectors, interfaces, etc.). The number and/or types of circuits implemented by the module 1000 may be varied according to the design criteria of a particular implementation.
The processor 1020 may be implemented as a microcontroller. The processor 1020 may comprise a block (or circuit) 1050, a block (or circuit) 1052, a block (or circuit) implementing the activation monitor 91, a block (or circuit) implementing the localization module 93, a block (or circuit) implementing the perception module 99, and/or a block (or circuit) implementing the ODDA 100. The circuit 1050 may implement a GNSS module and/or chipset. The circuit 1052 may implement a map module. The processor 1020 may comprise other components (not shown). In some embodiments, the processor 1020 may be a combined (e.g., integrated) chipset implementing processing functionality, the GNSS chipset 1050, the map module 1052 and/or the ODDA 100. In some embodiments, the processor 1020 may be comprised of a number of separate circuits (e.g., the microcontroller, the GNSS chipset 1050 and/or the mapping chipset 1052). The GNSS module 1050 and/or the mapping module 1052 may each be an optional component of the processor 1020. In an example, an off-board circuit (e.g., a component that is not part of the module 1000) may perform the functions of the GNSS chipset 1050 and send information to the module 1000 (e.g., via the bus 1002). In another example, an off-board circuit (e.g., a component that is not part of the module 1000 such as a distributed and/or scalable computing service) may perform functions for determining the cooperative positioning data and send information to the module 1000 (e.g., via the bus 1002). The design of the processor 1020 and/or the functionality of various components of the processor 1020 may be varied according to the design criteria of a particular implementation. The processor 1020 is shown sending data to and/or receiving data from the vehicle platform 80, the communication port 1022, and/or the memory 1028.
The memory 1028 may comprise a block (or circuit) 1060 and a block (or circuit) 1062. The block 1060 may store vehicle position data. The block 1062 may store computer readable instructions (e.g., instructions readable by the processor 1020). The vehicle position data 1060 may store various data sets 1070a-1070n. For example, the data sets 1070a-1070n may comprise position coordinates 1070a, calibration data 1070b, a time stamp/delay 1070c, relative position data 1070d, dead reckoning data 1070e, and/or other data 1070n.
The position coordinates 1070a may store location information data calculated and/or received by the module 1000 from signals presented by GNSS satellites and received by the GNSS receiver 212. The signals received by the GNSS receiver 212 may provide data from which a particular resolution of location information positional accuracy may be calculated. In some embodiments, the position coordinates 1070a may not provide sufficient positional accuracy for particular applications (e.g., lane detection, autonomous driving, etc.). The relative position data 1070d may be used to improve the accuracy of the position coordinates 1070a. In some embodiments, the position coordinates 1070a may be calculated by the filter 1024 and/or a component external to the module 1000. In some embodiments, the position coordinates 1070a may be calculated by the GNSS module 1050.
The calibration data 1070b may comprise parameters (e.g., coefficients) used to transform data received from the sensors (e.g., FLC, FLR, FCR, FCS, and IMU). The calibration data 1070b may provide many sets of coefficients (e.g., one set of coefficients for each of the sensors). The calibration data 1070b may be updatable. For example, the calibration data 1070b may store current values as coefficients for the sensors and as the data from the sensors drifts the module 1000 may update the calibration data 1070b in order to maintain accuracy. The format of the calibration data 1070b may vary based on the design criteria of a particular implementation.
The time stamp/delay 1070c may be used to determine an age of the vehicle position data 1060. In one example, the time stamp 1070c may be used to determine if the vehicle position data 1060 should be considered reliable or unreliable (e.g., data older than a pre-determined threshold amount of time may be unreliable). In an example, the time stamp 1070c may record a time in Coordinated Universal Time (UTC) and/or in a local time. The implementation of the time stamp 1070c may be varied according to the design criteria of a particular implementation.
The relative position data 1070d may be used to augment (e.g., improve) a precision of the position coordinates 1070a (e.g., the GNSS position) and/or provide an independent set of position data (e.g., cooperative position information). The relative position data 1070d may comprise ranging data corresponding to the relative position of the vehicle 50 to other vehicles and/or known points. The relative position data 1070d may represent a cooperative position solution (e.g., CoP). The relative position data 1070d may be used to account (e.g., compensate) for the local conditions that may affect an accuracy of the position coordinates 1070a. The relative position data 1070d may provide higher precision location information than the position coordinates 1070a.
The dead reckoning data 1070e may be used to store past and/or present information to determine positions traveled by the vehicle 50. For example, the dead reckoning data 1070e may store a previously determined position of the vehicle 50 (e.g., estimated speed, estimated time of travel, estimated location, etc.). The previously determined position may be used to help determine a current position of the vehicle 50. In some embodiments, the dead reckoning data 1070e may be determined based on data from the sensors 220, 222, and 224, and from the IMU 230 of the vehicle 50 (e.g., an on-board gyroscope and/or wheel click messages). The implementation and/or the information stored to determine the dead reckoning data 1070e may be varied according to the design criteria of a particular implementation.
Various other types of data (e.g., the other data 1070n) may be stored as part of the vehicle position data 1060. For example, the other data 1070n may store trend information for the calibration data 1070b. For example, the other data 1070n may store past data values of the calibration data 1070b and/or current data values of the calibration data 1070b. The past and current data values of the calibration data 1070b may be compared to determine trends used to extrapolate and/or predict potential future values for the calibration data 1070b. For example, the trend information may be used to continue to refine the calibration data 1070b when the module 1000 is operating in a pure dead reckoning mode (e.g., the location information fails the quality check). In some embodiments, the other data 1070n may store various coordinate systems determined using a procrusting procedure and/or multi-dimensional scaling operations.
The processor 1020 may be configured to execute stored computer readable instructions (e.g., the instructions 1062 stored in the memory 1028). The processor 1020 may perform one or more steps based on the stored instructions 1062. In an example, steps of the instructions 1062 may be executed/performed by the processor 1020 and may implement the one or more of the activation monitor 91, the localization module 93, the map interface 95, the perception module 99, and the ODDA 100. The instructions executed and/or the order of the instructions 1062 performed by the processor 1020 may be varied according to the design criteria of a particular implementation.
The communication port 1022 may allow the module 1000 to communicate with external devices such as the sensors the HD map receiver 210, the GNSS receiver 212, the FLC 220, the corner/side radar sensors 222a-222d, the FLR 224, and the IMU 230. For example, the module 1000 is shown connected to the external electronic bus 1002. In an example, information from the module 1000 may be communicated to an infotainment device for display to a driver. In another example, a wireless connection (e.g., Wi-Fi, Bluetooth, cellular, etc.) to a portable computing device (e.g., a smartphone, a tablet computer, a notebook computer, a smart watch, etc.) may allow information from the module 1000 to be displayed to a user.
The filter 1026 may be configured to perform a linear quadratic estimation. For example, the filter 1024 may implement a Kalman filter. Generally, the filter 1024 may operate recursively on input data to produce a statistically optimal estimate. For example, the filter 1024 may be used to calculate the position coordinates 1070a and/or estimate the accuracy of the position coordinates 1070a. In some embodiments, the filter 1024 may be implemented as a separate module. In some embodiments, the filter 1024 may be implemented as part of the memory 1028 (e.g., the stored instructions 1062). The implementation of the filter 1024 may be varied according to the design criteria of a particular implementation.
The clock 1026 may be configured to determine and/or track a time. The time determined by the clock 1026 may be stored as the time stamp data 1070c. In some embodiments, the clock 1026 may be configured to compare time stamps received from the GNSS receiver.
The module 1000 may be configured as a chipset, a system on chip (SoC) and/or a discrete device. For example, the module 1000 may be implemented as an electronic control unit (ECU). In some embodiments, the module 1000 may be configured to control activation of one or more ADAS features/functions.
The terms “may” and “generally” when used herein in conjunction with “is(are)” and verbs are meant to communicate the intention that the description is exemplary and believed to be broad enough to encompass both the specific examples presented in the disclosure as well as alternative examples that could be derived based on the disclosure. The terms “may” and “generally” as used herein should not be construed to necessarily imply the desirability or possibility of omitting a corresponding element.
The designations of various components, modules and/or circuits as “a”-“n”, when used herein, disclose either a singular component, module and/or circuit or a plurality of such components, modules and/or circuits, with the “n” designation applied to mean any particular integer number. Different components, modules and/or circuits that each have instances (or occurrences) with designations of “a”-“n” may indicate that the different components, modules and/or circuits may have a matching number of instances or a different number of instances. The instance designated “a” may represent a first of a plurality of instances and the instance “n” may refer to a last of a plurality of instances, while not implying a particular number of instances.
While the invention has been particularly shown and described with reference to embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the scope of the invention.
