EP0408595A1 - Eindringdetektor, der elektromagnetische wellen verwendet. - Google Patents

Eindringdetektor, der elektromagnetische wellen verwendet.

Info

Publication number
EP0408595A1
EP0408595A1 EP89903178A EP89903178A EP0408595A1 EP 0408595 A1 EP0408595 A1 EP 0408595A1 EP 89903178 A EP89903178 A EP 89903178A EP 89903178 A EP89903178 A EP 89903178A EP 0408595 A1 EP0408595 A1 EP 0408595A1
Authority
EP
European Patent Office
Prior art keywords
antenna
signal
conductive
receiving member
distance
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
EP89903178A
Other languages
English (en)
French (fr)
Other versions
EP0408595B1 (de
Inventor
Marcel Milin
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.)
MILIN, MARCEL
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0408595A1 publication Critical patent/EP0408595A1/de
Application granted granted Critical
Publication of EP0408595B1 publication Critical patent/EP0408595B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the existing devices currently for detecting a presence or a movement in a volume are only active if the event does not freeze.
  • the present invention has the advantage of being able to act in a predetermined volume and the fact that the target is stationary or mobile does not intervene in the detection mode.
  • the detection distance can be adjusted as required from a few millimeters to several meters.
  • the element to be detected may be near the transmitting antenna or between the antennas.
  • the radiation caused by the body sufficiently conductive of Hertzian energy (28) plays a very important role depending on its position between the antennas; in fact, the closer the conducting body is to the transmitting antenna (2), the greater the energy radiated towards the receiving antenna (11). This effect will be cleverly used to determine the approximate distance from the conductive body (28) of the reception antenna (11); moreover the immobility of the conductive body (28) is of no importance in the detection mode.
  • the transmitter is constituted by a pulse generator working in a frequency range oscillating from a few tenths of Hertz to several Megahertz.
  • a signal (4) from the transmitter (1) synchronizes the receiver so that during the idle time of no emission from the antenna (2) the receiver (13 ) is blocked.
  • a modulation (7) is preferred in the transmission signal and in the case of very noisy places or requiring special security an encoding signal (5) is desirable.
  • the transmission signal from the pulse generator (6) and the modulator (7) is amplified (9) to be directed to the transmission antenna (2).
  • the receiver (13) is quite simply an amplifier (14) which directly receives the synchronization signal (4) coming from the transmitter (1) and if the coding signal (5) exists.
  • the signal (3) transmitted by the antenna (2) is received via the airspace on the antenna (11).
  • Two cases can arise: First case: In the absence of the conductive body (28) the signal collected on the receiver (13) is intended to be insufficient so as not to exceed the predetermined signaling threshold. Introducing a sufficiently conductive body (28) between the antennas (2) and (11) is sufficient to cause the receiver to react, which then activates the means (12) and (15) of command and signaling actions. In addition, the detection distance can be adjusted at will by acting on the transmission power (9) or more simply on the sensitivity (18) of the receiver (13).
  • the transmitting antenna (2) will evolve: having only a small area of radiation to monitor a specific location it can go as far as covering the area of the volume to be monitored to follow, for example, the evolution of the conductive object (28) in the space to be checked.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP89903178A 1988-03-11 1989-03-08 Eindringdetektor, der elektromagnetische wellen verwendet Expired - Lifetime EP0408595B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8803201A FR2628556A1 (fr) 1988-03-11 1988-03-11 Detection de modification d'un volume par un corps conducteur
FR8803201 1988-03-11
PCT/FR1989/000093 WO1989008903A1 (fr) 1988-03-11 1989-03-08 Detecteur d'intrus a ondes hertziennes

Publications (2)

Publication Number Publication Date
EP0408595A1 true EP0408595A1 (de) 1991-01-23
EP0408595B1 EP0408595B1 (de) 1995-01-18

Family

ID=9364194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89903178A Expired - Lifetime EP0408595B1 (de) 1988-03-11 1989-03-08 Eindringdetektor, der elektromagnetische wellen verwendet

Country Status (5)

Country Link
EP (1) EP0408595B1 (de)
AT (1) ATE117448T1 (de)
DE (1) DE68920736D1 (de)
FR (1) FR2628556A1 (de)
WO (1) WO1989008903A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ273549A (en) * 1993-09-14 1996-12-20 John Ferdinand Muehlebach Movement detection; method and apparatus for detecting flying animals using microwave transmitted signal
RU2313830C1 (ru) * 2006-06-13 2007-12-27 Российская Федерация в лице Федерального агентства по атомной энергии Способ охранной сигнализации, устройство для его реализации и датчик температуры

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863240A (en) * 1972-12-08 1975-01-28 Aerospace Res Electromagnetic intrusion detection system
DK135353B (da) * 1974-11-07 1977-04-12 Schloeer Boerge Anlæg til detektering af bevægelige objekter inden for et overvåget område ved mikrobølgediffraktion.
DE2806448C2 (de) * 1978-02-15 1985-01-10 Brown, Boveri & Cie Ag, 6800 Mannheim System zur Objektsicherung und zum Personenschutz mittels einer Mikrowellenschranke
US4334214A (en) * 1979-06-29 1982-06-08 Yagi Antenna Co., Ltd. Warning apparatus using microwaves
FR2578077A1 (fr) * 1985-02-27 1986-08-29 Alsthom Cgee Procede et dispositif de detection d'intrusion a barriere hyperfrequence
DE3525976A1 (de) * 1985-07-20 1987-01-29 Bbc Brown Boveri & Cie Verfahren zur objektsicherung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8908903A1 *

Also Published As

Publication number Publication date
DE68920736D1 (de) 1995-03-02
FR2628556A1 (fr) 1989-09-15
ATE117448T1 (de) 1995-02-15
WO1989008903A1 (fr) 1989-09-21
EP0408595B1 (de) 1995-01-18

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