Virtual block control system for railway vehicle

• US 5,398,894 A
• Filed: 08/10/1993
• Issued: 03/21/1995
• Est. Priority Date: 08/10/1993
• Status: Expired due to Term

• Current Assignee: Ansaldo STS SPA
• Original Assignee: Union Switch & Signal, Inc. (Hitachi, Ltd.)
• Inventors: Pascoe, Robert D.
• Primary Examiner(s): Le, Mark T.
• Application Number:
  US08/104,875
• Time in Patent Office: 588 Days
• Field of Search: 246/20, 246/27, 246/28 R, 246/62, 246/122 R, 246/21, 246/22, 246/23, 246/24, 246/25, 246/26, 246/63 R, 246/63 C, 246/63 A, 246/64, 246/73, 246/74, 246/28 D, 246/131
• US Class Current: 246/28.00R
• CPC Class Codes: B61L 21/10 Arrangements for trains which are closely following one another

Abstract

A virtual block system is provided in which a section of track is represented by a zone having a plurality of virtual track circuits. Communication between wayside and the vehicle is established within the zone, and may be used to provide the initial position of the vehicle to the carborne equipment. The carborne equipment can then calculate and up-date its position within the zone by using its initial position and sensor information relative to its movement within the zone. The actual position within the zone can be transmitted from the vehicle to the wayside equipment. The wayside equipment converts the actual position within the zone to a virtual track circuit occupancy. The wayside equipment may also use the train length to calculate one or more virtual blocks as being occupied. The wayside unit outputs the occupancy status, occupied or unoccupied, to the wayside interlocking equipment. The wayside equipment generates profile data which can be transmitted to the vehicle.

Claims

1. An apparatus for control of a rail vehicle on a section of track having corresponding wayside interlocking equipment and carborne train operation equipment, such wayside interlocking equipment corresponding with at least one wayside zone, such apparatus comprising:

receiving means for receiving data relating to the physical location of such rail vehicle within such zone;

wayside CPU means for translating said location into occupancy signals representative of a plurality of virtual blocks within such zone;

means for sending said occupancy signals representative of said virtual blocks to such wayside interlocking equipment;

such wayside equipment having means for generating profile data indicative of operation of such rail vehicle within such zone; and

wayside transmitter means for transmitting said profile data to said rail vehicle.

2. The apparatus for control of a rail vehicle of claim 1 further comprising:

location determining means on such rail vehicle for determining said location of such rail vehicle within such zone.

3. The apparatus for control of a rail vehicle of claim 2 wherein said wayside transmitter means further comprises:

means for transmitting a zone signal within such zone to said rail vehicle; and

such rail vehicle includes means to receive said zone signal.

4. The apparatus for control of a rail vehicle of claim 3 further comprising:

sensor means on such rail vehicle to detect movement of such rail vehicle within such zone.

5. The apparatus for control of a rail vehicle of claim 4 wherein said location determining means uses the initial receipt of said zone signal and the output of said sensor means to determine said location of such rail vehicle.

6. The apparatus for control of a rail vehicle of claim 5 wherein said location is transmitted from such rail vehicle by a data radio on such rail vehicle.

7. The apparatus for control of a rail vehicle of claim 6 wherein said wayside transmitter means includes a radio for transmitting said zone signal to such rail vehicle.

8. The apparatus for control of a rail vehicle of claim 2 wherein said location is transmitted from such rail vehicle by a data radio on such rail vehicle.

9. The apparatus for control of a rail vehicle of claim 8 wherein said wayside transmitter means includes a radio for transmitting a zone signal to such rail vehicle.

10. The apparatus for control of a rail vehicle of claim 9 wherein said wayside transmitter means periodically transmits said zone signal.

11. The apparatus for control of a rail vehicle of claim 2 wherein said receiving means further comprises:

means for receiving other data related to the specific such rail vehicle at said location; and

said other data includes the length of such specific rail vehicle.

12. The apparatus for control of a rail vehicle of claim 11 wherein said other data further includes the identification of such specific rail vehicle.

13. The apparatus for control of a rail vehicle of claim 12 wherein said wayside transmitter means transmits a zone identification;

and

data radio means on such rail vehicle to transmit back such zone identification to such receiving means.

14. The apparatus for control of a rail vehicle of claim 1 wherein such section of track includes a plurality of such zones.

15. The apparatus for control of a rail vehicle of claim 14 wherein said plurality includes two zones covered by an interlocking room;

and

wherein such wayside equipment for said two zones is included in said interlocking room.

16. The apparatus for control of a rail vehicle of claim 14 wherein said wayside transmission means further includes a lossy coax antenna generally adjacent the track section within such zone.

17. The apparatus for control of a rail vehicle of claim 1 wherein said carborne train operation equipment includes automatic train operation equipment.

18. The apparatus for control of a rail vehicle of claim 17 wherein such carborne train operation equipment includes means for calculating a safe braking distance.

19. The apparatus for control of a rail vehicle of claim 1 wherein such carborne train operation equipment includes means for calculating a safe braking distance.

20. The apparatus for control of a rail vehicle of claim 1 wherein said wayside CPU means further includes means to accept signal from physical track circuits.

21. The apparatus for control of a rail vehicle of claim 20 wherein said wayside CPU means converts said signals from said physical track circuits to signals corresponding to representative ones of said virtual blocks.

22. The apparatus for control of a rail vehicle of claim 21 wherein:

said wayside CPU means further includes means to convert said profile data corresponding to said virtual blocks to profile data corresponding to said physical track circuits; and

said wayside transmitter means further includes means for transmitting said profile data corresponding to said physical track circuits.

23. An apparatus for control of a rail vehicle on a section of track having corresponding wayside interlocking equipment and carborne train operation equipment, such wayside interlocking equipment corresponding with at least one wayside zone, such apparatus comprising:

wayside transmitter means for transmitting a zone signal within such zone;

carborne receiver means for receiving said zone signal; and

location determining means on such rail vehicle for calculating the location of such rail vehicle within such zone from said zone signal.

24. The apparatus for control of a rail vehicle of claim 23 wherein said location determining means uses the initial receipt of said zone signal at the entrance to such zone to calculate such rail vehicle location.

25. The apparatus for control of a rail vehicle of claim 24 further comprising:

sensor means on such rail vehicle to detect movement of such rail vehicle within such zone.

26. The apparatus for control of a rail vehicle of claim 25 wherein said location determining means uses the initial receipt of said zone signal and the output of said sensor means to determine said location of such rail vehicle within such zone.

27. The apparatus for control of a rail vehicle of claim 26 wherein said location is transmitted from such rail vehicle by a data radio on such rail vehicle.

28. The apparatus for control of a rail vehicle of claim 23 wherein said location is transmitted from such rail vehicle by a data radio on such rail vehicle.

29. The apparatus for control of a rail vehicle of claim 27 wherein said data radio includes means for transmitting the length of such rail vehicle.

30. The apparatus for control of a rail vehicle of claim 28 wherein said data radio includes means for transmitting the length of such rail vehicle.

31. The apparatus for control of a rail vehicle of claim 29 wherein said receiver means includes means for receiving said zone signal.

32. The apparatus for control of a rail vehicle of claim 30 wherein said receiver means includes means for receiving said zone signal.

33. The apparatus for control of a rail vehicle of claim 31 wherein said data radio includes means for transmitting the identification of such zone.

34. The apparatus for control of a rail vehicle of claim 32 wherein said receiver means includes means for receiving said zone signal.

35. The apparatus for control of a rail vehicle of claim 28 wherein said receiver means includes means for receiving said zone signal.

36. The apparatus for control of a rail vehicle of claim 35 further comprising a data radio for transmitting said zone signal from such rail vehicle to wayside.

37. The apparatus for control of a rail vehicle of claim 23 further comprising means for storing the length of such zone on such rail vehicle.

38. The apparatus for control of a rail vehicle of claim 35 further comprising means for storing the length of such zone on such rail vehicle.

39. The apparatus for control of a rail vehicle of claim 23 wherein said location is transmitted from such rail vehicle by a data radio on such rail vehicle.

40. An apparatus for control of a rail vehicle on a section of track having corresponding wayside interlocking equipment and carborne train operation equipment, such wayside interlocking equipment corresponding with at least one wayside zone, such apparatus comprising:

wayside transmitter means for transmitting a zone signal within such zone;

carborne receiver means for receiving said zone signal;

location determining means on such rail vehicle for calculating the location of such rail vehicle within such zone from said zone signal and said location is transmitted from such rail vehicle by a data radio on such rail vehicle; and

wayside CPU means for translating said location in occupancy signals representative of a plurality of virtual blocks within such zone.

41. The apparatus for control of a rail vehicle of claim 40 further comprising:

wayside means for calculating profile data; and

wayside transmitter means for transmitting said profile data to such rail vehicle in such zone.

42. The apparatus for control of a rail vehicle of claim 41 wherein said data radio periodically transmits said location;

and

said wayside transmitter means periodically transmits said zone identification.

43. The apparatus for control of a rail vehicle of claim 42 wherein said wayside transmitter means periodically transmits a zone identification.

44. A method of controlling a rail vehicle on a section of track, such section of track having at least one wayside zone, said method comprising:

receiving at wayside a location signal from such rail vehicle that is representative of the location of such rail vehicle within such zone;

translating said location into occupancy signals representative of a plurality of virtual blocks within such zone; and

sending such occupancy signals to interlocking equipment.

45. The method of controlling a rail vehicle on a section of track of claim 44 further comprising:

transmitting said location signal from such rail vehicle to wayside within such zone.

46. The method of controlling a rail vehicle on a section of track of claim 44 further comprising:

calculating the occupancy of said virtual track blocks from the location of the rail vehicle within such zone and the length of such rail vehicle.

47. The method of controlling a rail vehicle on a section of track of claim 46 further comprising:

transmitting a zone signal adjacent the track within such zone.

48. The method of controlling a rail vehicle on a section of track of claim 47 further comprising:

calculating the location of such rail vehicle on board such rail vehicle from the receipt of said zone signal within such zone.

49. The method of controlling a rail vehicle on a section of track of claim 47 further comprising:

sensing movement of said rail vehicle within such zone; and

calculating the location of such rail vehicle on board such rail vehicle from the initial receipt of said zone signal within such zone and from the movement of such rail vehicle within such zone.

50. The method of controlling a rail vehicle on a section of track of claim 49 further comprising:

transmitting to wayside the length of such rail vehicle.

51. The method of controlling a rail vehicle on a section of track of claim 50 wherein said zone signal includes:

transmitting a zone identification to such rail vehicle.

52. The method of controlling a rail vehicle on a section of track of claim 51 further includes:

after receipt of said zone signal by such rail vehicle transmitting said zone identification from said rail vehicle to wayside.

53. The method of controlling a rail vehicle on a section of track of claim 44 further comprising:

receiving signals to wayside from physical track circuits within such zone; and

translating said signals from physical track circuits into representative virtual block occupancy signals.

54. The method of controlling a rail vehicle on a section of track of claim 45 further comprising:

receiving signals at wayside from physical track circuits within such zone; and

translating said signals from physical track circuits into representative virtual block occupancy signals.

55. A method of controlling a rail vehicle on a section of track, such section of track having at least one wayside zone, said method comprising:

transmitting a zone signal adjacent such zone;

receiving said zone signal upon such vehicle initially entering such zone; and

calculating the position of such rail vehicle within such zone from the initial receipt of said zone signal.

56. The method of controlling a rail vehicle on a section of track of claim 55 further comprising:

sensing movement of such rail vehicle within such zone; and

calculating the location of such rail vehicle on board such rail vehicle from the initial receipt of said zone signal within such zone and from the movement of such rail vehicle within such zone.

57. The method of controlling a rail vehicle on a section of track of claim 56 further comprising transmitting said location to wayside.

59. The method of controlling a rail vehicle on a section of track of claim 56 further comprising:

transmitting said location, and the length of such rail vehicle from such rail vehicle to wayside.

60. The method of controlling a rail vehicle on a section of track of claim 57 wherein said zone signal includes:

transmitting a zone identification to such rail vehicle.

61. The method of controlling a rail vehicle on a section of track of claim 60 further includes:

after receipt of said zone signal by such rail vehicle transmitting said zone identification from such rail vehicle to wayside.

58. A method of controlling a rail vehicle on a section of track, such section of track being representative of at least one wayside zone, said method comprising:

transmitting a zone signal adjacent such zone;

receiving said zone signal upon such vehicle initially entering such zone;

calculating the position of such rail vehicle within such zone from the initial receipt of said zone signal;

sensing movement of such rail vehicle within such zone;

calculating the location of such rail vehicle from the initial receipt of said zone signal within such zone and from the movement of such rail vehicle within such zone;

transmitting said location to wayside; and

translating at wayside said location into occupancy signals for a plurality of virtual track blocks.