Traffic warning system

• US 7,075,427 B1
• Filed: 10/14/2003
• Issued: 07/11/2006
• Est. Priority Date: 01/12/1996
• Status: Expired due to Fees

• Current Assignee: EVA Signal Corporation
• Original Assignee: EVA Signal Corporation
• Inventors: Pace, Joseph A., Pace, Joseph R.
• Primary Examiner(s): NGUYEN, HUNG T
• Application Number:
  US10/685,347
• Time in Patent Office: 1,001 Days
• Field of Search: 340/539.22, 340/901, 340/903, 340/907, 340/931, 340/933, 340/436, 340/438, 340/815.4, 340/815.45, 340/539.1, 340/815.41, 340/988, 246/125, 246/126, 246/292, 246/294, 246/114, 246/405
• US Class Current: 340/539.22
• CPC Class Codes: B61L 23/06 for warning men working on the route
• CPC Class Codes: B61L 29/28 electrically operated
• CPC Class Codes: B61L 29/30 Supervision, e.g. monitoring arrangements
• CPC Class Codes: G08G 1/042 using inductive or magnetic detectors
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/096758 where no selection takes place on the transmitted or the received information
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element
• CPC Class Codes: G08G 1/164 Centralised systems, e.g. external to vehicles

Abstract

The present invention is directed to a train detection system for detecting the velocity, presence, and direction of a railroad car which may be utilized in existing railroad crossing installations. The train detection system is suitable for self-testing of its components and if an anomaly has been detected, the train detection system is capable of placing the system in a fail-safe state. The train detection system of the present invention is also capable of constant communication between the sensor of said system and the implementing device of the train detection system via a wireless link.

Claims

1. A self-testing train detection system, comprising:

a train sensor operatively associated with at least one railroad track for detecting at least one railroad car, said train detector producing at least one signal;

a track trip unit associated with at least one railroad track, said track trip unit including a retractable trip arm for engaging a switch arm of rail cars; and

an implementing device operatively connected to said train sensor and said track trip unit, said implementing device responding to information received from said train sensor and said track trip unit appropriately, wherein said implementing device is capable of engaging a warning device if said railroad car has been detected by said train sensor or said track trip unit and whereby at least one of said train sensor and said implementing device are capable of placing said train detection system in a fail-safe state if at least one of said train sensor and said implementing device discovers an anomaly.

2. The self-testing train detection system as claimed in claim 1, wherein said implementing device is capable of setting parameters where if information from said train sensors is not within said parameters, then said implementing device may place said train detection system in a fail-safe state.

3. The self-testing train detection system as claimed in claim 1, wherein when at least one of said train sensor and implementation device discovers an anomaly then said implementation device is capable of engaging a warning device to alert motorists to use caution.

4. The self-testing train detection system as claimed in claim 1, wherein said train sensor is capable of determining the presence, direction, and speed of a moving train.

5. The self-testing train detection system as claimed in claim 1, wherein when power to said train sensor is interrupted said implementing device is capable of placing the train detection system into a fail-safe state.

6. The self-testing train detection system as claimed in claim 1, wherein said train sensor and said implementation device are suitable for independent operation and installation into existing systems.

7. The self-testing train detection system as claimed in claim 1, wherein said train sensor and said implementing device are capable of constant communication between each other.

8. The self-testing train detection system as claimed in claim 7, wherein said train sensor and said implementing device are capable of constant communication between each other via a wireless link.

9. The self-testing train detection system as claimed in claim 8, wherein said wireless link is capable of providing encrypted information suitable for providing secure information between said train sensor and said implementing device.

10. The self-testing train detection system as claimed in claim 1, wherein said sensor is located adjacent to said at least one railroad track.

11. A self-testing train detection system, comprising:

means for detecting presence, direction, and speed of a moving train, said detecting means including mechanical switching means for engaging a switch arm of rail cars when rail cars pass the mechanical switching means;

means for determining if information processed by said detecting means is within prescribed parameters;

means for placing said train detection system into a fail-safe state when said information processed by said train detection system is not within said prescribed parameters; and

means for engaging a warning device if said moving train has been detected or said system has been placed in a fail-safe state.

12. The self-testing train detection system of claim 11, wherein said means for detecting the presence, direction, and speed of a moving train comprises a sensor.

13. The self-testing train detection system of claim 12, wherein when an interruption in power to said sensor occurs said train detection system is placed into a fail-safe state.

14. The self-testing train detection system of claim 11, wherein said prescribed parameters may be adjusted and altered in order to be suitable for different applications.

15. The self-testing train detection system of claim 11, wherein said means for detecting presence, direction, and speed of a moving train and said means for determining if information processed by said detecting means is within prescribed parameters are in constant communication with each other.

16. A self-testing train detection system, comprising a train sensor operatively associated with at least one railroad track capable of detecting presence of at least one railroad car, comprising at least two solid state magneto-resistive chips and a processing chip suitable for calculating direction and speed of said railroad car;

a track trip unit associated with at least one railroad track, said track trip unit including a retractable trip arm for engaging a switch arm of rail cars; and

an implementing device including a programmable processor;

said implementing device being operatively connected to said processing chip of said sensor and said track trip unit, wherein said programmable processor of said implementing device engages a warning device if said railroad car has been detected by said sensor or said track trip unit and when at least one of said processing chip of said sensor and said programmable processor of-said implementing device discover an anomaly said detection system is placed into a fail-safe state.

17. The self-testing train detection system of claim 16, wherein said programmable processor of said implementing device is capable of having the parameters of the information said programmable processor validates to be adjusted.

18. The self-testing train detection system as claimed in claim 16, wherein said processing chip of said sensor and said programmable processor of said implementing device are in constant communication with each other.

19. The self-testing train detection system as claimed in claim 18, wherein said wherein said train sensor and said implementing device are capable of constant communication between each other via a wireless link.

20. The self-testing train detection system as claimed in claim 19, wherein said wireless link is capable of providing encrypted information suitable for providing secure information between said train sensor and said implementing device.

21. The self-testing train detection system as claimed in claim 16, wherein said train sensor and said implementation device are suitable for independent operation and installation into existing systems.

22. The self-testing train detection system as claimed in claim 16, wherein said sensor may be fitted within a single enclosure.

23. The self-testing train detection system as claimed in claim 16, wherein if said train sensor loses power then said train detection system is placed into a fail-safe state.

24. The self-testing train detection system as claimed in claim 23, wherein said implementation device engages said warning device when said train detection system has been placed in a fail-safe state.

25. The self-testing train detection system as claimed in claim 16, wherein said implementing device is capable of disengaging said warning device when said railroad car is moving away from a detection area.