Patent Application
20150212782
Embodiments of the subject matter described herein relate generally to avionics display systems. More particularly, embodiments of the subject matter described herein relate to a system and method for graphically identifying and displaying intruder aircraft having an incorrect reference pressure altimeter setting.
Barometric altitude is determined as a function of a reference pressure and the external air pressure. The pilot sets the reference pressure (i.e. the barosetting) using a rotatable knob or some other input device. The reference pressure may be provided by Air Traffic Control (ATC), a terminal radar approach control facility, a flight service station, or a ground station. Unfortunately, the pilot of an aircraft (e.g. an intruder aircraft) may incorrectly set the reference pressure.
There are several causes that result in the setting of an incorrect reference pressure. For example, there may be a miscommunication between the pilot and ATC. Additionally, pilots that fly international flights confront different standards in (1) altitude measurement using different units (e.g. feet vs. meters); (2) altitude reference setting using different units (e.g. hectoPascal or inches of mercury; (3) environmental conditions such as rapid atmospheric pressure changes; and the like. Errors in setting the reference pressure may also be caused by (1) high workload; (2) deviation from normal task sharing; (3) interruptions and distractions (4) absence of effective cross-check and backup among crewmembers; (5) incomplete briefings (e.g. failure to discuss applicable altimeter-setting units and the country practice for fixed or variable transition altitudes/levels; (6) language difficulties; and the like. If an aircraft relies on an incorrect intruder altitude to achieve a proper vertical separation standard, a potential conflict could result between the host aircraft and the intruder.
In view of the forgoing, it would be desirable to provide a system and method for detecting and graphically distinguishing on a display intruder aircraft having an incorrect barometric setting, thus alerting the crew of the host aircraft to exercise caution in the vicinity of the intruder.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
A method is provided for displaying intruder aircraft symbology on an avionics display system onboard a host aircraft. The method comprises receiving data from the intruder aircraft, determining the altitude of the intruder aircraft, displaying intruder symbology on the display, and generating symbology on the display to visually distinguish the intruder symbology when the barosetting of the intruder is substantially different from the barosetting of the host aircraft.
Also provided is a method for visually distinguishing intruder aircraft symbology when the intruder aircraft has an improperly set reference altitude. The method comprises receiving ADS-B data, from the intruder aircraft, on an avionics system including a display onboard a host aircraft from the intruder aircraft, determining the barosetting of the intruder aircraft, displaying the intruder aircraft on the display, and generating symbology on the display to highlight the intruder aircraft when the barosetting of the intruder aircraft differs from the barosetting of the host aircraft.
Furthermore, a system for displaying intruder aircraft symbology on an avionics display system onboard a host aircraft is provided. The system comprises a receiver for receiving intruder ADS-B data, a source of host aircraft data, and a display system for displaying symbology representative of the host aircraft and the intruder aircraft. The system also comprises a processor coupled to the receiver, the display system, and the source of host aircraft. The processor is configured to generate symbology visually distinguishing intruder aircraft on the display having a barosetting, as determined from its ADS-B data, that is greater or less than that of the host aircraft.
Other desirable features and characteristics will become apparent from the following detailed description and the appended claims taken in conjunction with this background and the accompanying drawings, in which:
The following detailed description is merely exemplary in nature and is not intended to limit the subject matter of the application and uses thereof. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description. Presented herein for purposes of explication are certain exemplary embodiments of how traffic information, particularly that associated with intruder aircraft, may be graphically displayed in a readily comprehendible manner. It should be appreciated that these explicated example embodiments are merely examples and guides for implementing the novel display system and method for graphically displaying traffic information symbology. As such, the examples presented herein are intended as non-limiting.
Techniques and technologies may be described herein in terms of functional and/or logical block components and with reference to symbolic representations of operations, processing tasks, and functions that may be performed by various computing components or devices. It should be appreciated that any number of hardware, software, and/or firmware components configured to perform the specified functions may realize the various block components shown in the figures. For example, an embodiment of a system or a component may employ various integrated circuit components, e.g., memory elements, digital signal processing elements, logic elements, look-up tables, or the like, which may carry out a variety of functions under the control of one or more microprocessors or other control devices.
The following description may refer to elements or nodes or features being “coupled” together. As used herein, unless expressly stated otherwise, “coupled” means that one element/node/feature is directly or indirectly joined to (or directly or indirectly communicates with) another element/node/feature, and not necessarily mechanically. Thus, although the drawings may depict one exemplary arrangement of elements, additional intervening elements, devices, features, or components may be present in an embodiment of the depicted subject matter. In addition, certain terminology may also be used in the following description for the purpose of reference only, and thus are not intended to be limiting.
For the sake of brevity, conventional techniques related to graphics and image processing, navigation, flight planning, aircraft controls, and other functional aspects of the systems (and the individual operating components of the systems) may not be described in detail herein. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in an embodiment of the subject matter.
It should be understood that
Image-generating devices suitable for use as display module 102 may include various analog (e.g., cathode ray tube) and digital (e.g., liquid crystal, active matrix, plasma, etc.) display modules. In certain embodiments, display module 102 may assume the form of a Head-Down Display (HDD) or a Head-Up Display (HUD) included within an aircraft's Electronic Flight Instrument System (EFIS). Display module 102 may be disposed at various locations throughout the cockpit. For example, display module 102 may comprise a primary flight display (PFD) and reside at a central location within the pilot's primary field-of-view. Alternately, display module 102 may comprise a secondary flight deck display, such as an Engine Instrument and Crew Advisory System (EICAS) display, mounted at a location for convenient observation by the aircraft crew but that generally resides outside of the pilot's primary field-of-view. In still further embodiments, display module 102 may be worn by one or more members of the flight crew.
In an exemplary embodiment, display module 102 is coupled to the graphics module 114, and graphics module 114 is coupled to the processor 112. Processor 112 and the graphics module 114 are cooperatively configured to display, render, or otherwise convey graphical representations or images of traffic information symbols on the display module 102. As stated previously, navigational system 104 includes an inertial reference system 118, a navigation database 120, one or more antennas 107 and at least one wireless transceiver 122. Inertial reference system 118 and wireless receiver 122 provide processor 112 with navigational information derived from sources onboard and external to the host aircraft, respectively. More specifically, inertial reference system 118 provides processor 112 with information describing various flight parameters of the host aircraft (e.g., position, orientation, velocity, etc.) as monitored by a number of motion sensors (e.g., accelerometers, gyroscopes, etc.) deployed onboard the aircraft. By comparison, and as indicated in
ADS-B, which consists of two different services, “ADS-B Out” and “ADS-B In”, will be replacing radar as the primary surveillance method for controlling aircraft worldwide. In the United States, ADS-B is an integral component of the NextGen national airspace strategy for upgrading or enhancing aviation infrastructure and operations. The ADS-B system can also provide traffic and government generated graphical weather information through TIS-B and Flight Information Service-Broadcast (FIS-B) applications. ADS-B enhances safety by making an aircraft visible, in real time, to ATC and to other appropriately equipped ADS-B aircraft with position and velocity data transmitted every second. ADS-B data can be recorded and downloaded for post-flight analysis. ADS-B also provides the data infrastructure for inexpensive flight tracking, planning, and dispatch. “ADS-B Out” periodically broadcasts information about each aircraft, such as identification, current position, altitude, and velocity, through an onboard transmitter. ADS-B Out provides air traffic controllers with real-time position information that is, in most cases, more accurate than the information available with current radar-based systems. “ADS-B In” is the reception by aircraft of FIS-B and TIS-B data and other ADS-B data such as direct communication from nearby aircraft. The ADS-B data is received by wireless receiver 122, and this data then is parsed into individual parts such as, Flight ID, location, bearing, altitude, and the like.
With continued reference to
TCAS is an airborne system that detects and tracks aircraft (i.e. intruder aircraft) near a host aircraft (i.e. the ownship). A TCAS system includes a processor (e.g. processor 112), antennas (e.g antenna 107), a traffic display such as is shown at 103 (e.g. a lateral map display, a vertical simulation display, etc.), and control means, such as is shown in
Navigation database 120 includes various types of navigation-related data stored therein. In a preferred embodiment, navigation database 120 is an onboard database that is carried by the aircraft. The navigation-related data includes various flight plan related data such as, for example, and without limitation: locational data for geographical waypoints; distances between waypoints; track between waypoints; data related to different airports; navigational aids; obstructions; special use airspace; political boundaries; communication frequencies; and aircraft approach information. The navigation system 104 is also configured to obtain one or more navigational parameters associated with operation of the aircraft. The navigation system 104 may be realized as a global positioning system (GPS), inertial reference system (IRS), or a radio-based navigation system (e.g., VHF Omni-directional radio range (VOR) or long range aid to navigation (LORAN), and may include one or more navigational radios or other sensors suitably configured to support operation of the navigation system 104, as will be appreciated in the art. In an exemplary embodiment, the navigation system 104 is capable of obtaining and/or determining the instantaneous position of the aircraft, that is, the current location of the aircraft (e.g., the latitude and longitude) and the altitude or above ground level for the aircraft. The navigation system 104 may also obtain and/or determine the heading of the aircraft (i.e., the direction the aircraft is traveling in relative to some reference).
Processor 112 is coupled to the navigation system 104 for obtaining real-time navigational data and/or information regarding operation of the aircraft to support operation of the display system 100. The communications system 106 is also coupled to the processor 112 and configured to support communications to and/or from the aircraft, as is appreciated in the art. The processor 112 is coupled to the flight management system 108, which in turn, may also be coupled to the navigation system 104 and the communications system 106 for providing real-time data and/or information regarding operation of the aircraft to the processor 112 to support operation of the aircraft. In addition, a traffic information module 105 is coupled to the processor 112, and utilizes ADS-B, TIS-B, and TCAS data gathered from the wireless transceiver 122 to graphically generate symbology that represents the surrounding aircraft and their associated traffic information. Furthermore, the user interface 110 is coupled to the processor 112, and the user interface 110 and the processor 112 are cooperatively configured to allow a user to interact with display module 102 and other elements of display system 100, as described in greater detail below.
In an exemplary embodiment, the display module 102 is realized as an electronic display configured to graphically display traffic information, weather information, and/or other data associated with operation of the aircraft under control of the graphics module 114. In an exemplary embodiment, the display module 102 is located within a cockpit of the aircraft. It will be appreciated that although
In an exemplary embodiment, the communications system 106 is suitably configured to support communications between the aircraft and another aircraft or ground location (e.g., air traffic control). In this regard, the communications system 106 may be realized using a radio communication system or another suitable data link system. In an exemplary embodiment, the flight management system 108 (or, alternatively, a flight management computer) is located onboard the aircraft. Although
The processor 112 and/or graphics module 114 are configured in an exemplary embodiment to display and/or render symbology on the display module 102 that is representative of the flight information. This allows a user (e.g., via user interface 110) to gain a better understanding of the surrounding aircraft. The processor 112 generally represents the hardware, software, and/or firmware components configured to facilitate the display and/or rendering of a navigational map on the display module 102 and perform additional tasks and/or functions described in greater detail below. Depending on the embodiment, the processor 112 may be implemented or realized with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The processor 112 may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration. In practice, the processor 112 includes processing logic that may be configured to carry out the functions, techniques, and processing tasks associated with the operation of the display system 100, as described in greater detail below. Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by the processor 112, or in any practical combination thereof.
The graphics module 114 generally represents the hardware, software, and/or firmware components configured to control the display and/or rendering of a navigational map on the display module 102 and perform additional tasks and/or functions described in greater detail below. In an exemplary embodiment, the graphics module 114 accesses one or more databases 116 including a symbology database 115 suitably configured to support operations of the graphics module 114, as described below. In this regard, the database 116 may comprise a symbology database, a waypoint database, required navigation performance (RNP) database, terrain database, a weather database, a flight plan database, an obstacle database, a navigational database, a geopolitical database, a terminal airspace database, a special use airspace database, or other information for rendering and/or displaying content on the display module 102, as described below. It will be appreciated that although
Also displayed in
However, it was determined that the reference altitude of intruder aircraft 208 is unacceptably different from that of host aircraft 202 (greater than 200-300 feet) due to an incorrect reference pressure setting. Thus, in accordance with an embodiment, intruder aircraft symbol 208 is highlighted and graphically distinguished from other aircraft, such as intruder aircraft symbology (e.g. symbology 206). In the case of
It should be emphasized that there are numerous ways to highlight and/or visually distinguish intruder aircraft symbology 208. For example, referring to
Thus, there has been provided a system and method for graphically displaying intruder aircraft symbology on an avionics display system onboard a host aircraft. The method comprises receiving data from the intruder aircraft, determining the reference altitude of the intruder aircraft, displaying intruder symbology on the display, and generating symbology on the display to visually distinguish the intruder symbology when the barosetting of the intruder is not substantially equal to the barosetting of the host aircraft.
While at least one exemplary embodiment has been presented in the foregoing detailed description of the invention, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment of the invention. It being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims.
