CA2094227A1 - Vital railway signal link with photo-emission means - Google Patents

Vital railway signal link with photo-emission means

Info

Publication number
CA2094227A1
CA2094227A1 CA2094227A CA2094227A CA2094227A1 CA 2094227 A1 CA2094227 A1 CA 2094227A1 CA 2094227 A CA2094227 A CA 2094227A CA 2094227 A CA2094227 A CA 2094227A CA 2094227 A1 CA2094227 A1 CA 2094227A1
Authority
CA
Canada
Prior art keywords
terminal location
signal
photo
signal link
railway signal
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.)
Granted
Application number
CA2094227A
Other languages
French (fr)
Other versions
CA2094227C (en
Inventor
Chinnarao Mokkapati
Ronald R. Capan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Union Switch and Signal Inc filed Critical Union Switch and Signal Inc
Publication of CA2094227A1 publication Critical patent/CA2094227A1/en
Application granted granted Critical
Publication of CA2094227C publication Critical patent/CA2094227C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres
    • 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 vehicle train, e.g. pedals
    • B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning

Abstract

A vital railway signal link for passing DC signals between a first terminal location and a second terminal location. A transmitter at the first terminal location receives a DC input signal and responsively produces a light signal modulated at a preselected frequency. The light signal is conducted through an optical fiber to the second terminal location. There, a receiver detects the light signal and produces a DC output signal. The receiver contains discriminator circuitry preferably including a bandpass filter to prevent light signals other than those modulated at the preselected frequency from giving an output signal.
CA002094227A 1992-07-27 1993-04-16 Vital railway signal link with photo-emission means Expired - Fee Related CA2094227C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/919,863 US5535968A (en) 1992-07-27 1992-07-27 Vital railway signal link
US07/919,863 1992-07-27

Publications (2)

Publication Number Publication Date
CA2094227A1 true CA2094227A1 (en) 1994-01-28
CA2094227C CA2094227C (en) 1997-03-04

Family

ID=25442765

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002094227A Expired - Fee Related CA2094227C (en) 1992-07-27 1993-04-16 Vital railway signal link with photo-emission means

Country Status (3)

Country Link
US (1) US5535968A (en)
CA (1) CA2094227C (en)
MX (1) MX9304001A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6259978B1 (en) * 1996-12-06 2001-07-10 Union Switch & Signal, Inc. Programmable relay driver
US6639470B1 (en) * 2000-10-06 2003-10-28 Skyworks Solutions, Inc. Constant current biasing circuit for linear power amplifiers
DE10163614C2 (en) * 2001-12-21 2003-10-30 Eads Deutschland Gmbh Method for signal transmission for the magnetic levitation railway
US7653315B2 (en) * 2003-01-21 2010-01-26 Gateway, Inc. Bi-directional optical monitor interconnect
US8221157B2 (en) * 2009-09-21 2012-07-17 Ideal Industries, Inc. Connector assemblies with integrated wiring diagrams and methods of using the same
CN113545169A (en) * 2019-01-14 2021-10-22 亮锐控股有限公司 Lighting device for frequency modulated transmission
CN114187753A (en) * 2021-11-25 2022-03-15 珠海格力电器股份有限公司 Data transmission device, method, control device and electrical equipment

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737806A (en) * 1970-01-12 1973-06-05 Westinghouse Air Brake Co Fail-safe circuit arrangements
US4009454A (en) * 1971-01-21 1977-02-22 Westinghouse Air Brake Company Fail-safe constant amplitude signal generator
US3793596A (en) * 1972-06-01 1974-02-19 Westinghouse Air Brake Co Vital level detector and {37 and{38 {0 gate circuit arrangement employing a twin-tee oscillator
US3800181A (en) * 1972-12-21 1974-03-26 Sperry Rand Corp Cathode ray tube high speed electromagnetic deflection flyback circuit
US3950690A (en) * 1973-11-19 1976-04-13 Westinghouse Air Brake Company Fail-safe reference voltage source
US3975643A (en) * 1974-01-23 1976-08-17 Westinghouse Air Brake Company Fail-safe opto-electronic phase inverting circuits
US4125784A (en) * 1977-07-27 1978-11-14 Westinghouse Air Brake Company Fail-safe or gate
US4130764A (en) * 1977-07-27 1978-12-19 Westinghouse Air Brake Company Fail-safe or logic circuit
US4289373A (en) * 1978-08-17 1981-09-15 Nippon Electric Co., Ltd. Bidirectional optical fiber transmission system
US4320315A (en) * 1979-04-20 1982-03-16 American Standard Inc. Fail-safe and gate circuit
US4320354A (en) * 1979-11-26 1982-03-16 American Standard Inc. Fail-safe band-pass circuit
US4399564A (en) * 1980-02-19 1983-08-16 The United States Of America As Represented By The Secretary Of The Navy Fiber optic system for transmission of video signals by pulse-frequency-modulation
HU193510B (en) * 1981-09-01 1987-10-28 Gyoergy Veisz Four-terminal filter arrangement
US4611291A (en) * 1983-11-10 1986-09-09 General Signal Corp. Vital interface system for railway signalling
US4755692A (en) * 1984-07-18 1988-07-05 American Standard Inc. Vital safety monitoring circuit
US4560953A (en) * 1984-08-20 1985-12-24 American Standard Inc. Fail-safe square-wave oscillator
US4894629A (en) * 1986-03-04 1990-01-16 Murata Manufacturing Co., Ltd. Bandpass filter having magnetically coupled resonators
GB8612956D0 (en) * 1986-05-28 1986-07-02 British Telecomm Optical signal regenerator
US5064274A (en) * 1987-08-26 1991-11-12 Siegel-Robert, Inc. Automatic automobile rear view mirror assembly
US4770522A (en) * 1987-11-02 1988-09-13 Siegel-Robert, Inc. Automobile mirror position sensor and adjuster assembly
JPH0367231A (en) * 1989-08-07 1991-03-22 Oki Electric Ind Co Ltd Optical repeating and transmitting system
US5005212A (en) * 1989-12-12 1991-04-02 At&T Bell Laboratories Interference suppression in optical communication systems
US5105295A (en) * 1990-01-03 1992-04-14 Gte Laboratories Incorporated Four level FSK optical signal transmission with optical decoding and direct detection
US5041745A (en) * 1990-10-01 1991-08-20 General Signal Corporation Failsafe bandpass filter/decoder

Also Published As

Publication number Publication date
MX9304001A (en) 1994-02-28
CA2094227C (en) 1997-03-04
US5535968A (en) 1996-07-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed