FR2425683A1 - SYSTEM PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES - Google Patents

SYSTEM PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES

Info

Publication number
FR2425683A1
FR2425683A1 FR7912021A FR7912021A FR2425683A1 FR 2425683 A1 FR2425683 A1 FR 2425683A1 FR 7912021 A FR7912021 A FR 7912021A FR 7912021 A FR7912021 A FR 7912021A FR 2425683 A1 FR2425683 A1 FR 2425683A1
Authority
FR
France
Prior art keywords
hazardous areas
prohibiting entry
operating facilities
underground operating
reception
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
FR7912021A
Other languages
French (fr)
Other versions
FR2425683B1 (en
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Publication of FR2425683A1 publication Critical patent/FR2425683A1/en
Application granted granted Critical
Publication of FR2425683B1 publication Critical patent/FR2425683B1/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/147—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using electro-magnetic technology, e.g. tags or radar
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Transmitters (AREA)

Abstract

L'INVENTION CONCERNE UN SYSTEME INTERDISANT LA PENETRATION DANS DES ZONES DANGEREUSES D'INSTALLATIONS D'EXPLOITATION SOUTERRAINES. DANS CE SYSTEME, IL EST PREVU UN OSCILLATEUR 1 PRODUISANT UN SIGNAL DE FREQUENCE F, UN PREMIER COUPLEUR DIRECTIONNEL 4, UN MODULATEUR 6 ET UN COUPLEUR DIRECTIONNEL 8 RELIE A UNE ANTENNE D'EMISSION, ET POUR LA RECEPTION, UN MELANGEUR SYMETRIQUE 16 RELIE A UNE ANTENNE 12 EFFECTUANT UNE RECEPTION SUR LA FREQUENCE 2 F ET QUI RECOIT EN OUTRE UNE PARTIE DECOUPLEE DE LA PUISSANCE D'EMISSION ET EST RELIE PAR UN AMPLIFICATEUR 17 A UN DISPOSITIF 29 D'EXPLOITATION DES SIGNAUX, AINSI QU'UNE BRANCHE DE CONTROLE. APPLICATION NOTAMMENT AUX SYSTEMES DE PROTECTION DANS LES MINES.THE INVENTION RELATES TO A SYSTEM FOR PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES. IN THIS SYSTEM, AN OSCILLATOR 1 PRODUCING AN F FREQUENCY SIGNAL, A FIRST DIRECTIONAL COUPLER 4, A MODULATOR 6 AND A DIRECTIONAL COUPLER 8 CONNECTED TO A SENDING ANTENNA, AND FOR RECEPTION, A SYMMETRIC MIXER 16 CONNECTED TO A AN ANTENNA 12 PERFORMING A RECEPTION ON FREQUENCY 2 F AND WHICH FURTHER RECEIVES A DECOUPLETED PART OF THE TRANSMISSION POWER AND IS CONNECTED BY AN AMPLIFIER 17 TO A DEVICE 29 FOR OPERATING SIGNALS, AS WELL AS A CONTROL BRANCH. APPLICATION IN PARTICULAR TO PROTECTION SYSTEMS IN MINES.

FR7912021A 1978-05-12 1979-05-11 SYSTEM PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES Granted FR2425683A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2820840A DE2820840C3 (en) 1978-05-12 1978-05-12 Arrangement for the protection of danger areas in underground operations

Publications (2)

Publication Number Publication Date
FR2425683A1 true FR2425683A1 (en) 1979-12-07
FR2425683B1 FR2425683B1 (en) 1985-02-08

Family

ID=6039249

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912021A Granted FR2425683A1 (en) 1978-05-12 1979-05-11 SYSTEM PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES

Country Status (5)

Country Link
BE (1) BE876198A (en)
DE (1) DE2820840C3 (en)
FR (1) FR2425683A1 (en)
GB (1) GB2024568B (en)
YU (1) YU111879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478514A1 (en) * 1980-03-20 1981-09-25 Aeg Elotherm Gmbh Machine tool operator protection equipment - reflects transmitter waves from working surface to receiver controlling safety switch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621435A (en) 1979-07-31 1981-02-27 Nissan Motor Co Ltd Extrahigh frequency transmitting and receiving device
DE3234601A1 (en) * 1982-09-17 1984-03-22 Siemens AG, 1000 Berlin und 8000 München Arrangement for marking persons and objects
GB2355098B (en) * 1998-04-30 2003-07-02 Us Gov Health & Human Serv Intrinsically safe roof hazard alert module
US6114955A (en) * 1998-06-03 2000-09-05 Interactive Technologies, Inc. System and method for antenna failure detection
US6469619B1 (en) 1999-04-20 2002-10-22 The United States Of America As Represented By The Department Of Health And Human Services Intrinsically-safe roof hazard alert module

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1187130A (en) * 1967-12-09 1970-04-08 Plessey Co Ltd Improvements in or relating to Vehicle Identification Systems.
US3798642A (en) * 1972-09-27 1974-03-19 Microlab Fxr Recognition system
DE2425332B1 (en) * 1974-05-25 1975-09-11 Ruhrkohle Ag Underground danger zone protection system - zone bounded by set frequency field danger signal emitted at deviant frequency

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO126975B (en) * 1967-03-30 1973-04-16 John Welsh

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1187130A (en) * 1967-12-09 1970-04-08 Plessey Co Ltd Improvements in or relating to Vehicle Identification Systems.
US3798642A (en) * 1972-09-27 1974-03-19 Microlab Fxr Recognition system
DE2425332B1 (en) * 1974-05-25 1975-09-11 Ruhrkohle Ag Underground danger zone protection system - zone bounded by set frequency field danger signal emitted at deviant frequency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478514A1 (en) * 1980-03-20 1981-09-25 Aeg Elotherm Gmbh Machine tool operator protection equipment - reflects transmitter waves from working surface to receiver controlling safety switch

Also Published As

Publication number Publication date
FR2425683B1 (en) 1985-02-08
DE2820840B2 (en) 1981-03-12
BE876198A (en) 1979-11-12
DE2820840A1 (en) 1979-11-22
GB2024568B (en) 1982-05-19
YU111879A (en) 1983-01-21
GB2024568A (en) 1980-01-09
DE2820840C3 (en) 1982-01-21

Similar Documents

Publication Publication Date Title
EP0364036A3 (en) Continuously transmitting and receiving radar
ATE285158T1 (en) METHOD AND DEVICE FOR DIRECTED RADIO TRANSMISSION
DK0505489T3 (en) Satellite based confirmation backward search system
DE69942056D1 (en) INTERFERENCE SUPPRESSION IN A COMBINED GPS RECEIVER AND COMMUNICATION SYSTEM
EP0306934A3 (en) Method for electronic data transmission and installation for using the method
RU93038863A (en) METHOD FOR DETERMINING LOCATION OF A REMOTE OBJECT, METHOD OF TRACKING FOR A MOBILE OBJECT AND INTEGRATED SYSTEM IMPLEMENTING THESE METHODS
MX9709332A (en) Pilot signal strength control for a low earth orbiting satellite communications system.
WO2002014814A3 (en) Method and device for operating a pmd system
FR2425683A1 (en) SYSTEM PROHIBITING ENTRY INTO HAZARDOUS AREAS OF UNDERGROUND OPERATING FACILITIES
ATE162026T1 (en) GROUND RADIO TRANSMITTER RECEIVER
ATE249105T1 (en) ANTENNA SYSTEM AND METHOD FOR OPERATING AN ANTENNA SYSTEM
RU2112146C1 (en) Device of wireless emergency call and technological information mine signalling and communication system
ES8701993A1 (en) System using one or more remotely controlled boats for conducting operations at sea.
FR2397758A1 (en) COMMUNICATION SYSTEM, ESPECIALLY FOR A MINE INSTALLATION
BR9815180A (en) Apparatus and method for reusing satellite broadcasting spectrum for terrestrial broadcasting signals.
FR2392552A1 (en) INFORMATION TRANSMISSION SYSTEM BY HERTZIAN BEAMS, IN WHICH TRANSMIT ANTENNAS AND RECEPTION ANTENNAS ARE LOCATED WITHIN SIGHT.
JPS55133148A (en) Interference wave removal system
FR2714483B1 (en) Method and device for reducing the power of interference signals received by the side lobes of a random frequency radar antenna.
ATE335320T1 (en) SATELLITE WITH ROUND BEAM ANTENNA
GB1226852A (en)
JPS57132437A (en) Transmitting power control system
SU1817567A1 (en) Method of and device for determining object coordinates
SE8700329D0 (en) RADARANLEGGNING
SE9202126D0 (en) PROCEDURE AND DEVICE FOR RADIO COMMUNICATION WITH BAND SPREADING TECHNOLOGY
SE9202124L (en) Radio frequency communication method and apparatus

Legal Events

Date Code Title Description
ST Notification of lapse