Systems and methods for configuring intersection detection zones

• US 7,573,400 B2
• Filed: 10/31/2005
• Issued: 08/11/2009
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Wavetronix
• Original Assignee: Wavetronix
• Inventors: Jarrett, Bryan R., Karlinsey, Thomas W., Waite, Jonathan L., Arnold, David V., Giles, Bradley C., Harris, Logan C.
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US11/264,339
• Publication Number:
  US 20070096943A1
• Time in Patent Office: 1,380 Days
• Field of Search: 340/907, 340/909, 340/910, 340/911, 340/912, 340/916, 340/917, 340/924, 340/933, 340/935, 340/937
• US Class Current: 340/907
• CPC Class Codes: G01S 13/34 using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
• CPC Class Codes: G01S 13/66 Radar-tracking systems; Analogous systems
• CPC Class Codes: G01S 13/87 Combinations of radar systems, e.g. primary radar and secondary radar
• CPC Class Codes: G01S 13/91 for traffic control G01S13/93 takes precedence
• CPC Class Codes: G08G 1/08 according to detected number or speed of vehicles

Abstract

The present invention extends to configuring detection zones in a traffic monitoring system and to association of detection zones with corresponding traffic signal phases. One or more sensors detect targets within a roadway intersection. The sensors integrate acquired sensor data for the targets into track files. The track files are subsequently used to identify common target paths. A histogram is used to identify common target positions for stationary targets. From the common target positions and the common target paths detection zones are configured. Detection zones are associated with traffic signal phases so that specific detections can be created. Lane boundaries within the roadway intersection are inferred from the common target paths. Permanent stationary target locations are identified from the common target positions.

Claims

1. At a computerized system that includes at least one sensor for sensing targets in a roadway intersection, a method for creating a system configuration, the method comprising:

an act of acquiring sensor data from one or more transducer views of the roadway intersection;

an act of detecting at least one target within the one or more transducer views based on the acquired sensor data;

an act of identifying a common target path from the at least one target; and

an act of configuring a detection zone based on the identified common target path.

2. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of acquiring sensor data from a plurality of transducer views.

3. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of acquiring sensor data from a plurality of different sensors.

4. The method as recited in claim 3, wherein the act of configuring a location of a detection zone comprises an act of finding the relative location of the plurality of different sensors.

5. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a Frequency Modulated Continuous Wave radar signal.

6. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a transmit signal that includes one or more of an acoustic transmit signal, a laser transmit signal, and an infrared transmit signal.

7. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a radar signal.

8. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of determining the range to one or more targets within the one or more transducer views.

9. The method as recited in claim 1, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a pulse compression radar signal.

10. The method as recited in claim 1, wherein the act of detecting at least one target within the one or more transducer views comprises an act of detecting at least one non-stationary target within the one or more transducer views.

11. The method as recited in claim 1, wherein the act of identifying a common target path from at least one the at least one target comprises:

an act of creating a track file from a target detection; and

an act of updating the track file from a plurality of subsequent target detections.

12. The method as recited in claim 1, wherein the act of identifying a common target path from the at least one target comprises an act of creating a two-dimensional histogram of target detections.

13. The method as recited in claim 1, wherein the act of configuring a detection zone comprises an act of configuring a vehicular detection zone.

14. The method as recited in claim 1, wherein the act of configuring a detection zone comprises an act of configuring a pedestrian detection zone.

15. The method as recited in claim 1, further comprising an act of generating digital data from one or more target detections and the system configuration.

16. The method as recited in claim 15, wherein the act of generating digital data comprises an act of generating an aerial view.

17. The method as recited in claim 15, wherein the act of generating digital data comprises an act of generating traffic statistics.

18. The method as recited in claim 1, wherein the roadway intersection is a roadway intersection with at least one traffic signal phase, and wherein the act of configuring a detection zone based on the identified common target path comprises an act of configuring a detection zone based on the identified common target path and the at least one traffic signal phase, the method further comprising:

an act of monitoring the at least one traffic signal phase.

19. The method as recited in claim 1, wherein the act of configuring a detection zone comprises an act of configuring the detection zone based on a traffic governing agency'"'"'s guidelines.

20. At a computerized system that includes at least one sensor for sensing targets in a roadway intersection, a method for creating a system configuration, the method comprising:

an act of acquiring sensor data from one or more transducer views of the roadway intersection;

an act of detecting at least one stationary target within the one or more transducer views based on the acquired sensor data;

an act of identifying at least one common target position from the at least one stationary target; and

an act of configuring a detection zone based on the common target position.

21. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of acquiring sensor data from a plurality of transducer views.

22. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a Frequency Modulated Continuous Wave radar signal.

23. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a transmit signal that includes one or more of an acoustic transmit signal, a laser transmit signal, and an infrared transmit signal.

24. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of a transmitting a radar signal.

25. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of transmitting a pulse compression radar signal.

26. The method as recited in claim 20, wherein the act of acquiring sensor data from one or more transducer views comprises an act of determining the range to one or more targets within the one or more transducer views.

27. The method as recited in claim 20, wherein the act of detecting at least one stationary target within the one or more transducer views comprises an act of detecting one or more stationary targets selected from among a stationary vehicle, a stationary pedestrian, a traffic signal pole, and a sensor.

28. The method as recited in claim 20, wherein the act of identifying at least one common target position comprises an act of identifying at least one common stationary target position.

29. The method as recited in claim 20, wherein the act of configuring a detection zone comprises an act of repeatedly detecting a stationary target using the sensor data.

30. The method as recited in claim 20, wherein the act of configuring a detection zone comprises an act of configuring the detection zone based on a traffic governing agency'"'"'s guidelines.

31. At a computerized system that includes at least one sensor with at least one detection zone for sensing vehicles in a roadway intersection with multiple traffic signal phases a method for creating a system configuration, the method comprising:

an act of acquiring sensor data from one or more transducer views of the roadway intersection;

an act of detecting targets within the one or more transducer views based on the acquired sensor data;

an act of identifying a common target path from at least one detected non-stationary target;

an act of detecting stationary targets within the one or more transducer views based on the acquired sensor data;

an act of identifying a common target position from at least one stationary target;

a step for creating a sensor configuration from the common target paths and common target positions; and

an act of configuring a detection zone from the at least one common target position.

32. A method as recited in claim 31, wherein the step for creating a sensor configuration from the common target paths and common target positions comprises:

a corresponding act of configuring detection zones for intersection actuation;

a corresponding act of associating configured detection zones with traffic signal phases;

a corresponding act of finding locations of lane boundaries for traffic lanes corresponding to the roadway intersection; and

a corresponding act of finding locations of permanent stationary targets associated with the roadway intersection.

33. A computer program product for use at a computerized system that includes at least one sensor for sensing targets in a roadway intersection, the computer program product for implementing a method for creating a system configuration, the computer program product comprising one or more computer-readable media having stored thereon computer-executable instructions that, when executed by one or more processors of the computerized system, cause the computerized system to perform the following:

acquire sensor data from one or more transducer views of the roadway intersection;

detect at least one target within the one or more transducer views based on the acquired sensor data;

identify a common target path from the at least one target; and

configure a detection zone from the common target path.

34. The computer program product as recited in claim 33, further comprising computer-executable instructions that, when executed by a processor, cause the computerized system to perform the following:

configure detection zones for intersection actuation;

associate configured detection zones with traffic signal phases;

find locations of lane boundaries for traffic lanes corresponding to the roadway intersection; and

find locations of permanent stationary targets associated with the roadway intersection.

35. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to acquire sensor data from one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to transmit a pulse compression radar signal.

36. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to detect targets within the one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to detect a non-stationary target within the one or more transducer views.

37. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to identify a target path for the detected target comprise computer-executable instructions that, when executed, cause the computerized system to:

create a track file from a target detection; and

update the track file from a plurality of subsequent target detections.

38. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to identify a target path for the detected target comprise computer-executable instructions that, when executed, cause the computerized system to create a two-dimensional histogram of target detections.

39. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to configure a detection zone comprise computer-executable instructions that, when executed, cause the computerized system to configure a vehicular detection zone.

40. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to configure a detection zone comprise computer-executable instructions that, when executed, cause the computerized system to configure a pedestrian detection zone.

41. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to configure a detection zone comprise computer-executable instructions that, when executed, cause the computerized system to configure a detection zone based on a traffic governing agency'"'"'s guidelines.

42. The computer program product as recited in claim 33, further comprising:

computer-executable instructions that, when executed, cause the computerized system to generate digital data from one or more target detections and a system configuration for purposes of creating an aerial view of the roadway intersection.

49. The computer program product as recited in claim 33, wherein computer-executable instructions that, when executed, cause the computerized system to configure a detection zone comprise computer-executable instructions that, when executed, cause the computerized system to configure a detection zone based on a traffic governing agency'"'"'s guidelines.

43. A computer program product for use at a computerized system that includes at least one sensor for sensing targets in a roadway intersection, the computer program product for implementing a method for creating a system configuration, the computer program product comprising one or more computer-readable media having stored thereon computer-executable instructions that, when executed by one or more processors of the computerize system, cause the computerized system to perform the following:

acquire sensor data from one or more transducer views of the roadway intersection;

detect at least one stationary target within the one or more transducer views in the acquired sensor data;

identify at least one common target position from the at least one stationary target; and

configure a detection zone from the at least one common target position.

44. The computer program product as recited in claim 43, further comprising computer-executable instructions that, when executed by a processor, cause the computerized system to perform the following:

configure detection zones for intersection actuation;

associate configured detection zones with traffic signal phases;

find locations of lane boundaries for traffic lanes corresponding to the roadway intersection; and

find locations of permanent stationary targets associated with the roadway intersection.

45. The computer program product as recited in claim 43, wherein computer-executable instructions that, when executed, cause the computerized system to acquire sensor data from one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to transmit a pulse compression radar signal.

46. The computer program product as recited in claim 43, wherein computer-executable instructions that, when executed, cause the computerized system to detect stationary targets within the one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to detect a plurality of reflections from a plurality of transmitted signals.

47. The computer program product as recited in claim 43, wherein computer-executable instructions that, when executed, cause the computerized system to detect stationary targets within the one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to detect one or more stationary targets selected from among a stationary vehicle, a stationary pedestrian, a traffic signal pole, and a sensor.

48. The computer program product as recited in claim 43, wherein computer-executable instructions that, when executed, cause the computerized system to detect stationary targets within the one or more transducer views comprise computer-executable instructions that, when executed, cause the computerized system to repeatedly detect a stationary target using the sensor data.

50. At a computerized traffic detection system that includes at least one sensor for sensing targets in a roadway intersection controlled by a traffic controller with at least one traffic signal phase, a method for configuring the roadway intersection, the method comprising:

an act of receiving detection indicators from a configured detection zone;

an act of monitoring the at least one traffic signal phase;

an act of creating an association of the configured detection zone with a traffic controller input based on the at least one signal phase and the detection indicators; and

an act of configuring the computerized traffic detection system to communicate a detection in the configured detection zone to the traffic controller on the associated traffic controller input.

51. The method as recited in claim 50, wherein the act of creating an association of the configured detection zone with a traffic controller input comprises an act of creating an association of the configured detection zone with a traffic controller input base on a traffic governing agency'"'"'s guidelines.

52. The method as recited in claim 50, wherein the act of configuring the computerized traffic detection system to communicate a detection in the configured detection zone to the traffic controller on the associated traffic controller input consists of the computerized traffic detection system causing a contact closure card to create a contact closure on the associated traffic controller input.