DE3870163D1 - ACOUSTIC PRESSURE DIFFERENTIAL DETECTOR IN THE ALARM. - Google Patents

ACOUSTIC PRESSURE DIFFERENTIAL DETECTOR IN THE ALARM.

Info

Publication number
DE3870163D1
DE3870163D1 DE8888440086T DE3870163T DE3870163D1 DE 3870163 D1 DE3870163 D1 DE 3870163D1 DE 8888440086 T DE8888440086 T DE 8888440086T DE 3870163 T DE3870163 T DE 3870163T DE 3870163 D1 DE3870163 D1 DE 3870163D1
Authority
DE
Germany
Prior art keywords
pressure differential
acoustic pressure
differential detector
alarm
threshold value
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 - Lifetime
Application number
DE8888440086T
Other languages
German (de)
Inventor
Christian Francois Philippe
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.)
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9356331&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3870163(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of DE3870163D1 publication Critical patent/DE3870163D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Measuring Fluid Pressure (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

Acoustic pressure differential detector for detecting the aperiodic wave resulting from the opening of a door or window in a closed room, comprising a microphone (1) and means for fixing a sensitivity threshold value, characterised in that it comprises means of regulation (6, 10) for varying said threshold value as a function of the microphone output. <IMAGE>
DE8888440086T 1987-10-30 1988-10-17 ACOUSTIC PRESSURE DIFFERENTIAL DETECTOR IN THE ALARM. Expired - Lifetime DE3870163D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8715052A FR2622719A1 (en) 1987-10-30 1987-10-30 DIFFERENTIAL DETECTOR OF ACOUSTIC PRESSURE

Publications (1)

Publication Number Publication Date
DE3870163D1 true DE3870163D1 (en) 1992-05-21

Family

ID=9356331

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888440086T Expired - Lifetime DE3870163D1 (en) 1987-10-30 1988-10-17 ACOUSTIC PRESSURE DIFFERENTIAL DETECTOR IN THE ALARM.

Country Status (8)

Country Link
EP (1) EP0317459B1 (en)
AT (1) ATE75063T1 (en)
CA (1) CA1311292C (en)
DE (1) DE3870163D1 (en)
DK (1) DK169647B1 (en)
FR (1) FR2622719A1 (en)
GR (1) GR3005179T3 (en)
NO (1) NO174487C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263771A (en) * 1992-01-04 1993-08-04 Sound International Ltd Intruder alarms
ATE171120T1 (en) * 1993-07-19 1998-10-15 Ping Lee A COMBINATION OF A MOTOR VEHICLE WITH AN ALARM SYSTEM

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569923A (en) * 1967-10-30 1971-03-09 Us Navy Adaptive acoustic detector apparatus
FR2122343B1 (en) * 1971-01-21 1975-02-21 Ato Inc
GB1605185A (en) * 1976-11-09 1983-03-02 Plessey Co Ltd Sensing arrangements
US4442514A (en) * 1981-11-17 1984-04-10 The United States Of America As Represented By The Secretary Of The Air Force Security system signal processor
US4479113A (en) * 1982-01-20 1984-10-23 The United States Of America As Represented By The United States Department Of Energy Compensated intruder-detection systems
FR2523339A1 (en) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro INFRA-SOUND VOLUMETRIC SENSOR DETECTION DEVICE AND INFRA-SOUND DETECTION METHOD
DE3300906A1 (en) * 1983-01-13 1984-07-19 Mauro 2054 Geesthacht Marmotti Method and device for room and building surveillance

Also Published As

Publication number Publication date
EP0317459A2 (en) 1989-05-24
NO884823L (en) 1989-05-02
FR2622719A1 (en) 1989-05-05
NO884823D0 (en) 1988-10-28
DK601688A (en) 1989-05-01
DK601688D0 (en) 1988-10-28
NO174487C (en) 1994-05-11
EP0317459B1 (en) 1992-04-15
GR3005179T3 (en) 1993-05-24
NO174487B (en) 1994-01-31
ATE75063T1 (en) 1992-05-15
DK169647B1 (en) 1995-01-02
CA1311292C (en) 1992-12-08
EP0317459A3 (en) 1989-08-09

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee