GB1114518A - Vehicle identification apparatus - Google Patents
Vehicle identification apparatusInfo
- Publication number
- GB1114518A GB1114518A GB2012566A GB2012566A GB1114518A GB 1114518 A GB1114518 A GB 1114518A GB 2012566 A GB2012566 A GB 2012566A GB 2012566 A GB2012566 A GB 2012566A GB 1114518 A GB1114518 A GB 1114518A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- transmitter
- transponder
- crystals
- wagon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000013078 crystal Substances 0.000 abstract 3
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/04—Indicating or recording train identities
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
1,114,518. Inductive signalling; transponder apparatus. RADIO CORPORATION OF AMERICA. 6 May, 1966 [17 May, 1965], No. 20125/66. Headings H4U and H4L. [Also in Division B7] In a system for identifying vehicles, e.g. railway wagons, as they pass a given point, each wagon 10 carries a transponder comprising a plurality of piezo-electric crystals 16, each tuned to a different frequency and connected in parallel to a loop aerial 18. A stationary transmitting loop 20 is positioned between the rails 12 and is connected to a transmitter 24 and via gate to a receiver 26. At the transmitter, pulses are generated at 28, shaped at 30 and modulate a carrier of about 2 Mc/s. at 32, the input to the receiver being blocked for the duration of each pulse from shaper 30. This excites the crystals 16 in the transponder and they continue to oscillate for a short time when the pulse from the transmitter ceases, the resulting signals being transmitted via loops 18, 20 to the receiver 26. Each wagon is allotted a characteristic combination of frequencies which energize corresponding crystals 40 at the receiver and via detectors 42 operate appropriate indicators 44.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US39826465A | 1965-05-17 | 1965-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1114518A true GB1114518A (en) | 1968-05-22 |
Family
ID=23574696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2012566A Expired GB1114518A (en) | 1965-05-17 | 1966-05-06 | Vehicle identification apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1114518A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3104013A1 (en) * | 1980-02-07 | 1982-02-25 | Meisei Electric Co., Ltd., Tokyo | System for detecting an abnormal internal tyre pressure |
-
1966
- 1966-05-06 GB GB2012566A patent/GB1114518A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3104013A1 (en) * | 1980-02-07 | 1982-02-25 | Meisei Electric Co., Ltd., Tokyo | System for detecting an abnormal internal tyre pressure |
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