ES475185A1 - System of transmission of the output signals of various radio receptors to a central, on a common data terminal (Machine-translation by Google Translate, not legally binding) - Google Patents

System of transmission of the output signals of various radio receptors to a central, on a common data terminal (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES475185A1
ES475185A1 ES475185A ES475185A ES475185A1 ES 475185 A1 ES475185 A1 ES 475185A1 ES 475185 A ES475185 A ES 475185A ES 475185 A ES475185 A ES 475185A ES 475185 A1 ES475185 A1 ES 475185A1
Authority
ES
Spain
Prior art keywords
signal
common data
translation
central
transmission
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
Application number
ES475185A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES475185A1 publication Critical patent/ES475185A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/125—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using short-range radio transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/20—Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)

Abstract

In controlling radio communications, problems arise as a result of the same signal transmitted by a vehicle being received simultaneously by a plurality of stationary receivers. To avoid these problems, the phase of the output signal occurring as a square-wave signal in the receiver after passing through a discriminator (D) and a trigger circuit (T) is modulated in an EXCLUSIVE-OR gate (EO) by a clock signal (TF) arriving from the central station. Before being forwarded via a bandpass filter (BP) to the common data line (S), the signal thus obtained is multiplied in a multiplier (M) by a factor which is derived from the level of the input signal. A low-pass filter (TP) and an amplifier (V), which advantageously has a non-linear characteristic, are used for this purpose. This results in a considerable boosting of the signal arriving from the receiver with the highest input level.
ES475185A 1977-11-17 1978-11-17 System of transmission of the output signals of various radio receptors to a central, on a common data terminal (Machine-translation by Google Translate, not legally binding) Expired ES475185A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2751417A DE2751417C2 (en) 1977-11-17 1977-11-17 Device for transmitting the output signals of several radio receivers via a common data line

Publications (1)

Publication Number Publication Date
ES475185A1 true ES475185A1 (en) 1979-04-01

Family

ID=6023968

Family Applications (1)

Application Number Title Priority Date Filing Date
ES475185A Expired ES475185A1 (en) 1977-11-17 1978-11-17 System of transmission of the output signals of various radio receptors to a central, on a common data terminal (Machine-translation by Google Translate, not legally binding)

Country Status (4)

Country Link
AT (1) AT376342B (en)
CH (1) CH637511A5 (en)
DE (1) DE2751417C2 (en)
ES (1) ES475185A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2931084C3 (en) * 1979-07-31 1982-03-11 Siemens AG, 1000 Berlin und 8000 München Radio system
DE3025930A1 (en) * 1980-07-09 1982-02-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt RADIO SYSTEM WITH LENGTH GIVEN ROUTES OF MOVING TRANSMITTER RECEIVING STATIONS
DE3149956A1 (en) * 1981-12-17 1983-06-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Line radio system
DE3236365A1 (en) * 1982-10-01 1984-04-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Radio system for data transmission with transceiver stations moving along predetermined paths
DE3736446A1 (en) * 1987-10-28 1989-05-11 Rheydt Kabelwerk Ag Radio transmission system

Also Published As

Publication number Publication date
ATA809578A (en) 1984-03-15
DE2751417A1 (en) 1979-05-23
AT376342B (en) 1984-11-12
CH637511A5 (en) 1983-07-29
DE2751417C2 (en) 1982-04-08

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990201