TR24261A - FREQUENCY ADJUSTABLE (FM) LINE CIRCUIT - Google Patents
FREQUENCY ADJUSTABLE (FM) LINE CIRCUITInfo
- Publication number
- TR24261A TR24261A TR88/0199A TR19988A TR24261A TR 24261 A TR24261 A TR 24261A TR 88/0199 A TR88/0199 A TR 88/0199A TR 19988 A TR19988 A TR 19988A TR 24261 A TR24261 A TR 24261A
- Authority
- TR
- Turkey
- Prior art keywords
- frequency
- track circuit
- receiver
- track
- bandwidth
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/18—Railway track circuits
- B61L1/181—Details
- B61L1/188—Use of coded current
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Amplifiers (AREA)
- Amplitude Modulation (AREA)
- Details Of Television Scanning (AREA)
- Transmitters (AREA)
Abstract
A circuit is described in which the bandwidth of the track circuit receiver (8) is design to be so narrow that it is virtually impossible for it to be subjected to interference. To permit interpretation of the frequency-modulated track voltage, the frequency deviation of which far exceeds the bandwidth of the receiver, the narrow band characteristic is achieved by means of an adjustable bandpass filter (7), the centre frequency of which is controlled so that it precisely follows the frequency of the track circuit transmitter (2). For this purpose, the output signal from the track circuit transmitter is fed to the track circuit receiver via a special lead (9). <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873708788 DE3708788A1 (en) | 1987-03-18 | 1987-03-18 | FREQUENCY MODULATED TRACK CIRCUIT |
Publications (1)
Publication Number | Publication Date |
---|---|
TR24261A true TR24261A (en) | 1991-07-29 |
Family
ID=6323367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TR88/0199A TR24261A (en) | 1987-03-18 | 1988-03-16 | FREQUENCY ADJUSTABLE (FM) LINE CIRCUIT |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0282932B1 (en) |
AT (1) | ATE140194T1 (en) |
DE (2) | DE3708788A1 (en) |
ES (1) | ES2091745T3 (en) |
TR (1) | TR24261A (en) |
YU (1) | YU53188A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19816581A1 (en) * | 1998-04-08 | 1999-10-21 | Siemens Ag | Train control device |
DE102007030598A1 (en) * | 2007-06-28 | 2009-01-15 | Siemens Ag | Method and device for evaluating an INDUSI signal |
DE102009010906A1 (en) * | 2009-03-02 | 2010-09-16 | Siemens Aktiengesellschaft | Devices for detecting the occupancy or free state of a track section and method for operating such devices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3715669A (en) * | 1970-08-13 | 1973-02-06 | Gen Signal Corp | Receiver for a frequency modulated overlay track circuit |
AT311413B (en) * | 1971-01-05 | 1973-11-12 | Itt Austria | Track monitoring device for railway systems |
US4417229A (en) * | 1980-10-15 | 1983-11-22 | Safetran Systems Corporation | Means for use on a railroad to distinguish between traction current and signal current |
DE3325249A1 (en) * | 1983-07-13 | 1985-01-31 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Track circuit receiver |
DE3403946A1 (en) * | 1984-02-04 | 1985-08-08 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Presence-of-trains indicating device with track current coding |
-
1987
- 1987-03-18 DE DE19873708788 patent/DE3708788A1/en not_active Withdrawn
-
1988
- 1988-03-12 AT AT88103941T patent/ATE140194T1/en not_active IP Right Cessation
- 1988-03-12 ES ES88103941T patent/ES2091745T3/en not_active Expired - Lifetime
- 1988-03-12 EP EP88103941A patent/EP0282932B1/en not_active Expired - Lifetime
- 1988-03-12 DE DE3855407T patent/DE3855407D1/en not_active Expired - Fee Related
- 1988-03-16 YU YU00531/88A patent/YU53188A/en unknown
- 1988-03-16 TR TR88/0199A patent/TR24261A/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP0282932A3 (en) | 1989-12-06 |
ATE140194T1 (en) | 1996-07-15 |
EP0282932A2 (en) | 1988-09-21 |
DE3855407D1 (en) | 1996-08-14 |
DE3708788A1 (en) | 1988-09-29 |
ES2091745T3 (en) | 1996-11-16 |
YU53188A (en) | 1990-12-31 |
EP0282932B1 (en) | 1996-07-10 |
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