Patent Grant
8965604
Rail vehicles, such as a train having one or more locomotives, for example, travel along a route from one location to another. Some trains travel along the route in an automatic mode in which, prior to traveling along the route, a controller predetermines one or more train parameters, such as speed and notch setting, for example, at each location along the route. In order to predetermine the train parameter(s) at each location along the route, the controller may use a memory which prestores a characteristic of the route at each location, such as the grade, for example. While traveling along the route, the controller may need to be aware of the train location to ensure that actual train parameter(s) track or match the predetermined train parameter(s) at each train location. Additionally, since the route may include various train parameter restrictions at various locations, such as a speed restriction, for example, the controller may need to be aware when the train location is approaching a location of a restriction in order to adjust the train parameter(s), if needed, to comply with the train parameter restriction.
Alternatively, the train may travel along the route in a manual mode, in which the train operator is responsible for manually adjusting the train parameters. As with the automatic mode, while traveling along the route, the train operator may need to be aware of the train location, such as when the train location approaches a restriction location, for example. The train operator can then manually adjust the train parameter(s) to comply with a train parameter restriction.
Some known systems have been designed to assist the controllers in the automatic mode and the train operators in the manual mode by providing locations of the train as the train travels along the route. These systems, however, may rely solely on a global positioning satellite (GPS) system, which provides one measurement of the train location based on satellite positioning, or other positioning systems using wireless network or wayside equipment, to provide raw position measurements of the train. Upon receiving the positioning system measurement, the controller uses an internal memory to convert this raw position measurement to a distance measurement of the train along the route.
As with any measurement system, such position measurement systems are capable of error, such as if a GPS receiver of the train fails to communicate with a sufficient number of satellites in the GPS system or an error in the memory of the controller which may convert an accurate raw position measurement to an inaccurate distance measurement along the route, for example. Accordingly, it would be advantageous to provide plural independent distance measurements, such as an independent distance or position measurement in addition to a GPS measurement of the distance of the train along the route, so to ensure that the distance estimation provided to the controller or train operator is reliable. Additionally, it would be advantageous to assign a quality value to the distance estimation provided to the controller or train operator.
In one embodiment of the presently described inventive subject matter, a system is provided for determining a quality value of a location estimation of a powered system at a location. The system includes a first sensor configured to measure a first parameter of the powered system at the location. The system further includes a second sensor configured to measure a second parameter of the powered system at the location. The system further includes a second controller configured to determine the location estimation of the powered system and the quality value of the location estimation, based upon a first location of the powered system based on the first parameter, and a second location of the powered system based on the second parameter of the powered system.
In one embodiment of the presently described inventive subject matter, a system is provided for determining a quality value of a location estimation of a powered system at a location. The system includes a speed sensor configured to determine a speed of the powered system at the location. The system further includes a position determination device configured to provide a measured position of the powered system. The system further includes a second controller configured to determine the quality value of the location estimation during a first time period when the position determination device provides the measured position of the powered system. The quality value is based on at least one of an uncertainty in the position of the powered system and an uncertainty in the speed of the powered system.
In one embodiment of the presently described inventive subject matter, a method is provided for determining a quality value of a location estimation of a powered system at a location. The method includes measuring a speed of the powered system at the location, and measuring a position of the powered system. The method further includes determining the location estimation of the powered system and the quality value of the location estimation. The step of determining the location estimation and quality value of the location estimation is based upon a first location of the powered system based on the speed, and a second location of the powered system based on the measured position of the powered system.
In one embodiment, a system (e.g., a control system) includes a speed sensor, a position determination device, and at least one controller. The speed sensor is configured to output speed data representative of a measured speed at which a powered system is traveling at a location. With respect to rail vehicles as the powered system, the powered system may be traveling along a predefined trajectory, such as along a track. The position determination device is configured to output location data representative of a measured position of the powered system at the location. The at least one controller is configured to determine a location estimation of the powered system based on a speed-based distance estimation and a position-based distance estimation of the powered system from one or more reference points. The speed-based distance estimation is based at least in part on the measured speed and the position-based distance estimation is based at least in part on the measured position. The at least one controller is configured to determine a quality value of the location estimation that is based at least in part on the location estimation and the measured position of the powered system. The powered system is a rail vehicle consist comprising at least one locomotive having the speed sensor, the position determination device, and the at least one controller.
In another embodiment, a method (e.g., for controlling a powered system) includes receiving speed data from a speed sensor disposed onboard a locomotive of a rail vehicle consist. The speed data is representative of a measured speed at which the rail vehicle consist is traveling at a location. The method also includes receiving location data from a position determination device disposed onboard the locomotive of the rail vehicle consist. The location data is representative of a measured position of the rail vehicle consist at the location. The method further includes determining a speed-based distance estimation of the rail vehicle consist based at least in part on the speed data. The speed-based distance estimation is representative of separation of the rail vehicle consist from a reference point. The method includes determining a position-based distance estimation of the rail vehicle consist based at least in part on the location data. The position-based distance estimation representative of the separation of the rail vehicle consist from the reference point. The method further includes determining a location estimation of the rail vehicle consist from the speed-based distance estimation and the position-based distance estimation and determining a quality value of the location estimation based at least in part on the location estimation and the measured position of the rail vehicle consist.
In another embodiment, a system (e.g., a vehicle control system) includes a speed sensor, a position determination device, and one or more controllers. The speed sensor is configured to generate speed data that represents a velocity of a vehicle system along a route. The position determination device is configured to generate location data that represents a position of the vehicle system along the route. The one or more controllers are configured to determine a speed-based distance of the vehicle system from a reference location based on the speed data and to determine a location-based distance of the vehicle system from the reference location based on the location data. The one or more controllers also are configured to determine a location estimation of the vehicle system along the route based on the speed-based distance and the location-based distance and to determine a quality value of the location estimation based on the location data. The one or more controllers also are configured to at least one of autonomously control or direct manual control of the velocity of the vehicle system according to a trip plan that designates speeds of the vehicle system as a function of distance along the route. The one or more controllers also are configured to use the location estimation to determine the velocity of the vehicle system according to the trip plan responsive to the quality value remaining within a designated range.
A more particular description of the embodiments of the inventive subject matter described herein will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. Understanding that these drawings depict only some embodiments of the inventive subject matter and are not therefore to be considered to be limiting of the entire scope of the inventive subject matter, the embodiments of the inventive subject matter will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
In describing particular features of different embodiments of the presently described inventive subject matter, number references will be utilized in relation to the figures accompanying the specification. Similar or identical number references in different figures may be utilized to indicate similar or identical components among different embodiments of the inventive subject matter.
Though example embodiments of the presently described inventive subject matter are described with respect to rail vehicles, or railway transportation systems, specifically trains and locomotives having diesel engines, example embodiments of the inventive subject matter also are applicable for other uses, such as but not limited to off-highway vehicles (OHV), marine vessels, automobiles, agricultural vehicles, transport buses, and the like, one or more of which may use at least one engine (e.g., diesel engine), such as an internal combustion engine. Toward this end, when discussing a specified mission, the mission may include a task or requirement to be performed by the powered system. With respect to railway vehicles, marine vehicles, transport vehicles, agricultural vehicles, OHVs, automobiles, and the like as a powered system, the term “mission” may refer to the movement of the vehicle from a present location to a destination. Operating conditions of power generating units in a powered system may include one or more of speed, load, fueling value, timing, and the like. Furthermore, although diesel powered systems are disclosed, one or more embodiments disclosed herein also may be utilized with non-diesel powered systems, such as but not limited to natural gas powered systems, bio-diesel powered systems, electric powered systems, and the like. Furthermore, as disclosed herein, the powered systems may include multiple engines, other power sources, and/or additional power sources, such as, but not limited to, battery sources, voltage sources (such as but not limited to capacitors), chemical sources, pressure-based sources (such as but not limited to spring and/or hydraulic expansion), current sources (such as but not limited to inductors), inertial sources (such as but not limited to flywheel devices), gravitational-based power sources, thermal-based power sources, and the like.
In one example involving marine vessels, a plurality of tug boats or vessels (e.g., also referred to as powered units) may be operating together where several or all of the tug boats are moving the same larger marine vessel, the tug boats may be linked in time to accomplish the mission of moving the larger vessel. In another example, a single marine vessel may have a plurality of engines. OHVs may involve a fleet of vehicles that have a common mission to move earth or other materials, from a first location to a different, second location, where each OHV is linked in time to accomplish the mission. In one example involving rail vehicles, a plurality of powered systems (e.g., locomotives or other rail vehicles capable of self-propulsion) may be operating together where all are moving the same larger load and are linked in time to accomplish a mission of moving the larger load. In another example embodiment, a rail vehicle may have more than one powered system.
The evaluation system 10 includes a speed sensor 22 positioned on the powered unit 17 to measure a speed of the powered system 16 at the location 18 along the route 20. The speed sensor 22 may be any type of speed sensors used to measure the speed of a moving powered unit, such as a wheel speed sensor. The evaluation system 10 further includes a controller 34 coupled to the speed sensor 22. The speed sensor 22 measures one or more characteristics of movement of the powered unit 17 (e.g., revolutions per minute of one or more wheels, axles, engines, and the like, velocity of the powered unit 17, and the like) and generates speed data representative of the movement of the powered unit 17. The speed data may be or include a measurement of the actual speed of the powered unit 17 or may include information that is used by the controller 34 to calculate or determine the velocity of the powered unit 17. The controller 34 determines a first distance estimation 30 of the powered system 16 from the reference point 13 along the route 20 based on the speed of the train 16 from the reference point 13 to the location 18 along the route 20. The first distance estimation 30 may be referred to as a speed-based distance estimation. In one embodiment, the controller 34 integrates the speed of the train 16 over the time period that the train 16 travels between the reference point 13 and the location 18 to determine the first distance estimation 30. Although the speed sensor 22 illustrated in
The evaluation system 10 further includes a position determination device 24, such as a transceiver or receiver, and associated communication circuitry, for example, to acquire location data representative of a measured position of the powered system 16. In one embodiment, the position determination device 24 is a GPS device configured to communicate with a plurality of global positioning satellites 44, 46, for example. Although
In another embodiment, the position determination device 24 may receive the speed data from the speed sensor 22 and determine the speed-based distance estimation 30. For example, the position determination device 24 may integrate the speed data over time to determine the distance estimation 30.
The controller 34, speed sensor 22, and position determination device 24 may all be disposed onboard a single powered unit 17 of a powered system 16 that includes one or more powered units 17. Alternatively, one or more of the controller 34, the speed sensor 22, and/or the position determination device 24 may be located onboard another powered unit 17 or a non-powered unit (e.g., a vehicle incapable of self-propulsion but that may otherwise consume electric current to power one or more loads) of the same powered system 16.
In one embodiment, in contrast with the first distance estimation 30 of the powered system 16 from the reference point 13 to the location 18 along the route 20, the measured position of the powered system 16 or powered unit 17 may be a raw position of the powered system 16 or powered unit 17 (e.g., a latitude/longitude of the powered system 16 or powered unit 17, for example), and may not correlate or represent a distance of the powered system 16 or powered unit 17 from the reference point 13 along the route 20. Although
The controller 34 is coupled to the position determination device 24. The controller 34 converts the measured position of the powered system 16 into a second distance 32 of the powered system 16 along the route 20. The second distance 32 may be referred to as a position-based distance. The controller 34 can determine the second distance 32 based on a memory 36 of the controller 34 that stores the second distance 32 of the powered system 16 along the route 20. The memory 36 can store a list of the measured positions (e.g., in terms of latitude/longitude) for the entire route 20, and the distance of each measured position from the reference point 13 along the route 20 as the second distance 32. Although the position determination device 24 illustrated in
The evaluation system 10 can further include a second controller 28 configured to determine the distance estimation 14 of the powered system 16 at the location 18 along the route 20 and/or the third quality value 12 of the distance estimation 14 of the powered system 16 at the location 18 along the route 20. As illustrated in
As further illustrated in the example embodiment of
The speed sensor 22 can continuously or periodically measure the speed of the powered unit 17 and/or continuously or periodically provide the speed data to the controller 34. The second controller 28 also may receive the first distances 30 on a continuous or periodic time interval basis. The position determination device 24 may not continuously or periodically provide measured positions of the powered system 16, but may instead provide the measured positions at diluted time intervals, such as times that are based on the availability of the message signals from the satellites 44, 46, in addition to other factors, such as in response to manual and/or automatically generated prompts, for example. Thus, the second controller 28 can receive the second distance 32 data from the controller 34 on a diluted time interval basis. Based on the difference in the repeated (e.g., continuous or periodic) and diluted time intervals of the respective first and second distances 30, 32 provided to the second controller 28, the second controller 28 can dynamically determine the third quality value 12 of the distance estimations on a diluted time interval basis, which effectively acts as a correction to the first distance 30 provided on the continuous or periodic time interval basis.
As further illustrated in the exemplary embodiment of
Quality Value Increase(t)=K2*Previous Value Quality*t+K1*t (Eqn. 1)
Accordingly, during the initial portion of the second time period 48 in
Quality Value Decrease(t)=Previous Quality Value+skew(based on position uncertainty signal) (Eqn. 2)
Accordingly, as the value of the position uncertainty signal 38 that is provided from the position determination device 24 decreases, the greater the decrease in the quality value back down to the range of quality values prior to the position determination device 24 having ceased to provide the measured position. The third quality value 12 can increase once the position determination device 24 ceases to provide a measured position since only one distance measurement (e.g., the speed-based distance 30) is being utilized to determine the location of the powered system 16, and the distance measurement that is based on the location data provided by the position determination device 24 will not be relied upon significantly until the position uncertainty signal 38 is once again relatively low.
The controller 34 may operate according to a trip plan to autonomously control operations of the powered system 16 according to designated operational parameters of a trip plan and/or to direct an operator of the powered system 16 to manually control operations of the powered system 16 according to the operational parameters of the trip plan. The trip plan may include designated (e.g., predetermined) operational parameters of the powered system 16, such as operational settings (e.g., throttle settings, brake settings, speeds, accelerations, braking efforts, and the like). The operational parameters may be expressed as a function of position along the route or distance traveled along the route during the trip. The controller 34 may automatically control the powered system 16 according to the trip plan, such as by implementing the designated operational parameters of the powered system 16 when the powered system 16 reaches a corresponding position or distance traveled in the trip. Alternatively or additionally, the controller 34 may direct an operator of the powered system 16 to manually implement the designated operational parameters, such as by displaying or otherwise presenting instructions to the operator on how to control the actual parameters of the powered system 16 to match the designated operational parameters of the trip plan when the powered system 16 reaches the corresponding location or distance of the trip plan. In one embodiment, the controller 34 determines or obtains initial designated parameters of a trip plan for the powered system 16 for each location or several different locations along the route 20 prior to the powered system 16 commencing a trip along the route 20 or while the powered system 16 is traveling along the route 20. The controller 34 can use the distance estimation 14 and the third quality value 12 of the distance estimation 14 to control the actual parameters of the powered system. For example, the controller 34 can manually direct the operator or automatically adjust the actual parameters of the powered system 16 to match or approach the designated parameters of the trip plan at one or more upcoming locations 19 (
One or more functions of operating or controlling the powered system 16 may change responsive to the quality value of the distance estimation or changes in the quality value. As described above, the controller 34 may rely on the distance estimation 14 to automatically control operations of the powered system 16 according to a trip plan. In one embodiment, the controller 34 may switch from automatic control of the powered system 16 to manual control of the powered system 16 when the quality value of the distance estimation falls outside of a designated range. For example, when the quality value indicates that the distance estimation is less reliable than before or is no longer reliable, then the controller 34 may stop autonomous control of the powered system 16 and may switch to a manual control to allow the operator to take over manual control of the powered system 16. Alternatively, the controller 34 may not switch from automatically controlling operations of the powered system 16 to manual control of the powered system 16 if the powered system 16 is traveling less than a speed limit. For example, if the speed data from the speed sensor 22 indicates that the powered system 16 is traveling slower than a speed limit of the route 20 by at least a designated amount, then the controller 34 may remain in an automatic mode to autonomously control the operations of the powered system 16, even if the quality value of the distance estimation falls outside of the designated range.
In another embodiment, the controller 34 may present (e.g., visually display on an output device, such as a display device in the powered unit 17) a rolling map to an operator of the powered system 16. The rolling map may represent where the powered system 16 is located that changes as the powered system 16 moves. The portion of the map that is currently displayed to the operator may be based on the distance estimation 14. When the quality value indicates that the distance estimation 14 is less reliable than before or is no longer reliable, then the controller 34 may stop presenting the rolling map to the operator.
In another embodiment, a system (e.g., a control system) includes a speed sensor, a position determination device, and at least one controller. The speed sensor is configured to output speed data representative of a measured speed at which a powered system is traveling at a location. The position determination device is configured to output location data representative of a measured position of the powered system at the location. The at least one controller is configured to determine a location estimation of the powered system based on a speed-based distance estimation and a position-based distance estimation of the powered system from one or more reference points. The speed-based distance estimation is based at least in part on the measured speed and the position-based distance estimation is based at least in part on the measured position. The at least one controller is configured to determine a quality value of the location estimation that is based at least in part on the location estimation and the measured position of the powered system. The powered system is a rail vehicle consist comprising at least one rail vehicle having the speed sensor, the position determination device, and the at least one controller.
In another aspect, the at least one controller is configured to convert the measured position of the powered system into the position-based distance estimation of the powered system along a route from the one or more reference points along the route based on one or more previously measured positions and corresponding position-based distance estimations from the one or more reference points along the route.
In another aspect, the speed sensor is configured to provide a speed uncertainty signal to the at least one controller that is indicative of a level of uncertainty in the measured speed. The at least one controller is configured to determine the quality value of the location estimation based at least in part on the speed uncertainty signal.
In another aspect, the speed uncertainty signal is a predefined signal having at least one of a constant value or a manually controllable value.
In another aspect, the position determination device is configured to provide a location uncertainty signal to the at least one controller that is indicative of a level of uncertainty in the measured position. The at least one controller can be configured to determine the quality value of the location estimation based on the location uncertainty signal.
In another aspect, the at least one controller is configured to determine the quality value of the location estimation based on one or more previously acquired quality values.
In another aspect, the position determination device is at least one global positioning system (GPS) receiver configured to communicate with one or more global positioning satellites to determine the location data.
In another aspect, the location estimation of the powered system at the location is based on at least one of a sum of or difference between the quality value of the location estimation and at least one of the speed-based distance estimation or the measured position.
In another aspect, the at least one controller is configured to receive the speed data from the speed sensor more frequently than the at least one controller receives the location data from the position determination device.
In another aspect, the position determination device is configured to periodically provide the location data to the at least one controller and the at least one controller is configured to determine the quality value based on a prior quality value that is determined at one or more times between when the location data is periodically provided to the at least one controller.
In another aspect, the at least one controller is configured to decrease the quality value when the position determination device fails to provide the location data to the at least one controller.
In another aspect, the at least one controller is configured to compare the speed-based distance estimation and the measured position to determine a precision of the measured position relative to the speed-based distance estimation.
In another aspect, the at least one controller is configured to at least one of autonomously control or direct manual control of operations of the powered system during a trip along a route according to a trip plan. The trip plan designates operational parameters of the powered system as a function of distance along the route. The at least one controller can be configured to determine which of the operational parameters designated by the trip plan to use to control the powered system based on the location estimation.
In another aspect, the operational parameters that are designated by the trip plan are designated speeds of the powered system.
In another aspect, the at least one controller is configured to stop autonomously controlling the operations of the powered system during the trip when the quality value changes to a value that is outside of a designated range.
In another aspect, the at least one controller is configured to continue autonomously controlling the operations of the powered system during the trip when the measured speed of the powered system is less than a speed limit of the route by at least a designated amount even if the quality value is outside of the designated range.
In another aspect, if the quality value is within a designated range, the at least one controller is configured to present a map to an operator of the powered system that indicates where the powered system is located based on the location estimation and, if the quality value is outside of the designated range, the at least one controller is configured to stop presenting the map.
In another aspect, the at least one controller is configured to use the speed-based distance estimation and the position-based distance estimation as inputs into a Kalman filter to determine the location estimation and the quality value.
In another embodiment, another system (e.g., a control system) includes a speed sensor, a position determination device, and at least one controller. The speed sensor is configured to output speed data representative of a measured speed at which a powered system is traveling at a location. The position determination device is configured to output location data representative of a measured position of the powered system at the location. The at least one controller is configured to determine a location estimation of the powered system from one or more reference points, based at least in part on the measured speed and the measured position, and the at least one controller is configured to determine a quality value of the location estimation that is based at least in part on the location estimation and the measured position of the powered system.
In another aspect, the at least one controller is configured to determine the location estimation of the powered system based on a speed-based distance estimation and a position-based distance estimation of the powered system. The speed-based distance estimation can be based at least in part on the measured speed and the position-based distance estimation can be based at least in part on the measured position.
In another embodiment, a method (e.g., for controlling a powered system) includes receiving speed data from a speed sensor disposed onboard a first rail vehicle of a rail vehicle consist. The speed data is representative of a measured speed at which the rail vehicle consist is traveling at a location. The method also includes receiving location data from a position determination device disposed onboard the first rail vehicle of the rail vehicle consist. The location data is representative of a measured position of the rail vehicle consist at the location. The method further includes determining a speed-based distance estimation of the rail vehicle consist based at least in part on the speed data. The speed-based distance estimation is representative of separation of the rail vehicle consist from one or more reference points. The method also includes determining a position-based distance estimation of the rail vehicle consist based at least in part on the location data. The position-based distance estimation is representative of the separation of the rail vehicle consist from the reference point. The method further includes determining a location estimation of the rail vehicle consist based at least in part on the speed-based distance estimation and the position-based distance estimation and determining a quality value of the location estimation based at least in part on the location estimation and the measured position of the rail vehicle consist.
In another aspect, the method also includes receiving at least one of a speed uncertainty signal from the speed sensor that is indicative of a level of uncertainty in the measured speed or receiving a location uncertainty signal from the position determination device that is indicative of a level of uncertainty in the measured position. The quality value of the location estimation is determined based at least in part on at least one of the speed uncertainty signal or the location uncertainty signal.
In another aspect, the quality value of the location estimation is determined based on one or more previously acquired quality values.
In another aspect, the method also includes at least one of autonomously controlling or directing manual control of operations of the rail vehicle consist during a trip along a route according to a trip plan. The trip plan designates speeds of the rail vehicle consist as a function of distance along the route. The method can also include controlling actual speeds of the rail vehicle consist to match one or more of the speeds designated by the trip plan based on the location estimation.
In another aspect, the method also includes stopping autonomous control of the rail vehicle consist according to the trip plan when the quality value changes to a value that is outside of a designated range.
In another aspect, the method includes, if the quality value is within a designated range, presenting a map to an operator of the powered system that indicates where the rail vehicle consist is located based on the location estimation and, if the quality value is outside of the designated range, stopping presentation of the map.
In another embodiment, another method (e.g., for controlling a powered system) includes receiving speed data from a speed sensor disposed onboard a first rail vehicle of a rail vehicle consist. The speed data is representative of a measured speed at which the rail vehicle consist is traveling at a location. The method also includes receiving location data from a position determination device disposed onboard the first rail vehicle of the rail vehicle consist. The location data is representative of a measured position of the rail vehicle consist at the location. The method further includes determining a location estimation of the rail vehicle consist from one or more reference points based at least in part on the speed data and the location data and determining a quality value of the location estimation based at least in part on the location estimation and the measured position of the rail vehicle consist.
In another aspect, the method also includes determining a speed-based distance estimation of the rail vehicle consist based at least in part on the speed data. The speed-based distance estimation is representative of separation of the rail vehicle consist from the one or more reference points. The method can also include determining a position-based distance estimation of the rail vehicle consist based at least in part on the location data, where the position-based distance estimation is representative of the separation of the rail vehicle consist from the one or more reference points. The location estimation of the rail vehicle consist can be determined based at least in part on the speed-based distance estimation and the position-based distance estimation.
In another embodiment, another system (e.g., a control system) includes a speed sensor, a position determination device, and one or more controllers. The speed sensor is for generating speed data that represents a velocity of a vehicle system along a route. The position determination device is for generating location data that represents a position of the vehicle system along the route. The one or more controllers are for determining a speed-based distance of the vehicle system from a reference location based on the speed data and for determining a location-based distance of the vehicle system from the reference location based on the location data. The one or more controllers also are for determining a location estimation of the vehicle system along the route based on the speed-based distance and the location-based distance and for determining a quality value of the location estimation based on the location data. The one or more controllers also are for at least one of autonomously controlling or directing manual control of the velocity of the vehicle system according to a trip plan that designates speeds of the vehicle system as a function of distance along the route. The one or more controllers also are for using the location estimation to determine the velocity of the vehicle system according to the trip plan responsive to the quality value remaining within a designated range.
In another aspect, the one or more controllers are configured to cease the at least one of autonomously controlling or directing manual control of the velocity of the vehicle system according to the trip plan responsive to the quality value being outside of the designated range.
In another aspect, the one or more controllers are configured to continue the at least one of autonomously controlling or directing manual control of the velocity of the vehicle system according to the trip plan even when the quality value is outside of the designated range if the velocity of the vehicle system is less than a designated speed limit of the route by at least a designated amount.
In another aspect, the one or more controllers also are for presenting a map to an operator of the vehicle system to notify the operator of where the vehicle system is located along the route, the one or more controllers configured to stop presenting the map to the operator responsive to the quality value being outside of the designated range.
In another aspect, the speed sensor is configured to provide a speed uncertainty signal that is representative of uncertainty in an accuracy of the speed data. The one or more controllers can be configured to determine the quality value based on the speed uncertainty signal.
In another aspect, the position determination device is configured to provide a position uncertainty signal that is representative of uncertainty in an accuracy of the location data. The one or more controllers can be configured to determine the quality value based on the position uncertainty signal.
In another aspect, the vehicle system is a rail vehicle consist having a locomotive, and the speed sensor, the position determination device, and the one or more controllers are disposed onboard the locomotive.
This written description uses examples to disclose embodiments of the inventive subject matter and to enable a person of ordinary skill in the art to make and use the embodiments of the inventive subject matter. The patentable scope of the embodiments of the inventive subject matter is defined by the claims, and may include other examples that occur to those of ordinary skill in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
This application is a continuation-in-part of U.S. patent application Ser. No. 12/047,496, which was filed on 13 Mar. 2008 now U.S. Pat. No. 8,190,312. The entire subject matter of U.S. patent application Ser. No. 12/047,496 is incorporated by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 3519805 | Thorne-Booth | Jul 1970 | A |
| 3650216 | Harwick | Mar 1972 | A |
| 3655962 | Koch | Apr 1972 | A |
| 3865042 | Depaola | Feb 1975 | A |
| 4005838 | Grundy | Feb 1977 | A |
| 4041283 | Mosier | Aug 1977 | A |
| 4042810 | Mosher | Aug 1977 | A |
| 4181943 | Mercer, Sr. | Jan 1980 | A |
| 4253399 | Spigarelli | Mar 1981 | A |
| 4279395 | Boggio | Jul 1981 | A |
| 4344364 | Nickles et al. | Aug 1982 | A |
| 4401035 | Spigarelli | Aug 1983 | A |
| 4561057 | Haley, Jr. | Dec 1985 | A |
| 4602335 | Perlmutter | Jul 1986 | A |
| 4711418 | Aver, Jr. | Dec 1987 | A |
| 4735385 | Nickles | Apr 1988 | A |
| 4794548 | Lynch | Dec 1988 | A |
| 4827438 | Nickles | May 1989 | A |
| 4853883 | Nickles | Aug 1989 | A |
| 5109343 | Budway | Apr 1992 | A |
| 5398894 | Pascoe | Mar 1995 | A |
| 5437422 | Newman | Aug 1995 | A |
| 5440489 | Newman | Aug 1995 | A |
| 5676059 | Alt | Oct 1997 | A |
| 5744707 | Kull | Apr 1998 | A |
| 5758299 | Sandborg | May 1998 | A |
| 5785392 | Hart | Jul 1998 | A |
| 5828979 | Polivka | Oct 1998 | A |
| 5950967 | Montgomery | Sep 1999 | A |
| 6112142 | Shockley | Aug 2000 | A |
| 6125311 | Lo | Sep 2000 | A |
| 6144901 | Nickles | Nov 2000 | A |
| 6226591 | Okumura | May 2001 | B1 |
| 6268804 | Janky | Jul 2001 | B1 |
| 6269034 | Shibuya | Jul 2001 | B1 |
| 6308117 | Ryland | Oct 2001 | B1 |
| 6456937 | Doner | Sep 2002 | B1 |
| 6487488 | Peterson, Jr. | Nov 2002 | B1 |
| 6490523 | Doner | Dec 2002 | B2 |
| 6505103 | Howell | Jan 2003 | B1 |
| 6516727 | Kraft | Feb 2003 | B2 |
| 6591758 | Kumar | Jul 2003 | B2 |
| 6609049 | Kane et al. | Aug 2003 | B1 |
| 6612245 | Kumar | Sep 2003 | B2 |
| 6612246 | Kumar | Sep 2003 | B2 |
| 6615118 | Kumar | Sep 2003 | B2 |
| 6641090 | Meyer | Nov 2003 | B2 |
| 6691957 | Hess, Jr. | Feb 2004 | B2 |
| 6694231 | Rezk | Feb 2004 | B1 |
| 6732023 | Sugita | May 2004 | B2 |
| 6763291 | Houpt | Jul 2004 | B1 |
| 6789005 | Hawthorne | Sep 2004 | B2 |
| 6810312 | Jammu | Oct 2004 | B2 |
| 6824110 | Kane | Nov 2004 | B2 |
| 6845953 | Kane | Jan 2005 | B2 |
| 6853888 | Kane | Feb 2005 | B2 |
| 6856865 | Hawthorne | Feb 2005 | B2 |
| 6863246 | Kane | Mar 2005 | B2 |
| 6865454 | Kane | Mar 2005 | B2 |
| 6903658 | Kane | Jun 2005 | B2 |
| 6915191 | Kane | Jul 2005 | B2 |
| 6922619 | Baig | Jul 2005 | B2 |
| 6957131 | Kane | Oct 2005 | B2 |
| 6978195 | Kane | Dec 2005 | B2 |
| 6980894 | Gordon | Dec 2005 | B1 |
| 6996461 | Kane | Feb 2006 | B2 |
| 7021588 | Hess, Jr. | Apr 2006 | B2 |
| 7021589 | Hess, Jr. | Apr 2006 | B2 |
| 7024289 | Kane | Apr 2006 | B2 |
| 7036774 | Kane | May 2006 | B2 |
| 7079926 | Kane | Jul 2006 | B2 |
| 7092800 | Kane | Aug 2006 | B2 |
| 7092801 | Kane | Aug 2006 | B2 |
| 7096096 | Kane | Aug 2006 | B2 |
| 7209810 | Meyer | Apr 2007 | B2 |
| 7869950 | Ueda | Jan 2011 | B2 |
| 20020059075 | Schick | May 2002 | A1 |
| 20020096081 | Kraft | Jul 2002 | A1 |
| 20030213875 | Hess, Jr. | Nov 2003 | A1 |
| 20040133315 | Kumar | Jul 2004 | A1 |
| 20040245410 | Kisak | Dec 2004 | A1 |
| 20050065674 | Houpt | Mar 2005 | A1 |
| 20050065726 | Meyer et al. | Mar 2005 | A1 |
| 20050120904 | Kumar | Jun 2005 | A1 |
| 20060025921 | Jung | Feb 2006 | A1 |
| 20070219680 | Kumer | Sep 2007 | A1 |
| 20090138199 | Bonanni | May 2009 | A1 |
| Number | Date | Country |
|---|---|---|
| 1297982 | Apr 2003 | EP |
| 2000247235 | Sep 2000 | JP |
| 2004104789 | Jul 2005 | RU |
| 2272731 | Mar 2006 | RU |
| 8905255 | Jun 1989 | WO |
| Entry |
|---|
| Unofficial English translation of Office Action issued in connection with corresponding KZ Application No. 2009/1529.1. |
| Number | Date | Country | |
|---|---|---|---|
| 20120232726 A1 | Sep 2012 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12047496 | Mar 2008 | US |
| Child | 13480814 | US |
