DK169647B1 - Differentialdetektor til akustisk tryk - Google Patents

Differentialdetektor til akustisk tryk Download PDF

Info

Publication number
DK169647B1
DK169647B1 DK601688A DK601688A DK169647B1 DK 169647 B1 DK169647 B1 DK 169647B1 DK 601688 A DK601688 A DK 601688A DK 601688 A DK601688 A DK 601688A DK 169647 B1 DK169647 B1 DK 169647B1
Authority
DK
Denmark
Prior art keywords
microphone
comparator
signal
voltage
input
Prior art date
Application number
DK601688A
Other languages
Danish (da)
English (en)
Other versions
DK601688D0 (da
DK601688A (da
Inventor
Francois Philippe
Original Assignee
Francois Philippe
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=DK169647(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Francois Philippe filed Critical Francois Philippe
Publication of DK601688D0 publication Critical patent/DK601688D0/da
Publication of DK601688A publication Critical patent/DK601688A/da
Application granted granted Critical
Publication of DK169647B1 publication Critical patent/DK169647B1/da

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)
DK601688A 1987-10-30 1988-10-28 Differentialdetektor til akustisk tryk DK169647B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8715052 1987-10-30
FR8715052A FR2622719A1 (fr) 1987-10-30 1987-10-30 Detecteur differentiel de pression acoustique

Publications (3)

Publication Number Publication Date
DK601688D0 DK601688D0 (da) 1988-10-28
DK601688A DK601688A (da) 1989-05-01
DK169647B1 true DK169647B1 (da) 1995-01-02

Family

ID=9356331

Family Applications (1)

Application Number Title Priority Date Filing Date
DK601688A DK169647B1 (da) 1987-10-30 1988-10-28 Differentialdetektor til akustisk tryk

Country Status (8)

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

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 (de) * 1993-07-19 1998-10-15 Ping Lee Eine kombination eines kraftfahrzeugs mit einem alarmsystem

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 (el) * 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 (fr) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro Dispositif de detection a capteur volumetrique a infra-sons et procede de detection par infra-sons
DE3300906A1 (de) * 1983-01-13 1984-07-19 Mauro 2054 Geesthacht Marmotti Verfahren und vorrichtung zur raum- und gebaeudeueberwachung

Also Published As

Publication number Publication date
NO174487B (no) 1994-01-31
DK601688D0 (da) 1988-10-28
NO884823D0 (no) 1988-10-28
DK601688A (da) 1989-05-01
EP0317459A3 (en) 1989-08-09
FR2622719A1 (fr) 1989-05-05
NO174487C (no) 1994-05-11
DE3870163D1 (de) 1992-05-21
NO884823L (no) 1989-05-02
EP0317459B1 (fr) 1992-04-15
GR3005179T3 (el) 1993-05-24
ATE75063T1 (de) 1992-05-15
EP0317459A2 (fr) 1989-05-24
CA1311292C (fr) 1992-12-08

Similar Documents

Publication Publication Date Title
US4853677A (en) Portable intrusion alarm
US4827244A (en) Test initiation apparatus with continuous or pulse input
US4612442A (en) Passive infrared intrusion detection system
US5164703A (en) Audio intrusion detection system
US4901056A (en) Test initiation apparatus with continuous or pulse input
US3585581A (en) Seismic sensor apparatus
US4319349A (en) Ultrasonic intrusion detection system
US3696369A (en) Signal processor
US4003045A (en) Intrusion detection systems with turbulence discrimination
US4193055A (en) Automatic sensitivity level adjustment
US3548206A (en) Noise rejection circuits for particle counters
WO1992002913A1 (en) Sound detection system
US6246322B1 (en) Impulse characteristic responsive missing object locator operable in noisy environments
US5309147A (en) Motion detector with improved signal discrimination
US3922663A (en) Seismic human footstep detector
US4920332A (en) Differential detector of acoustic pressure
DK169647B1 (da) Differentialdetektor til akustisk tryk
US5109216A (en) Portable intrusion alarm
US3974489A (en) Centralized monitor and alarm system for monitoring remote areas with acoustical electric transducers
GB2451241A (en) Infrasonic intruder alarm using digital signature matching
US3750131A (en) Silent emergency alarm system for schools and the like
US5473167A (en) Sensitivity test system for photoelectric smoke detector
US3947838A (en) Intrusion alarm system
JP3333646B2 (ja) 赤外線式人体検知装置
AU604452B2 (en) Suppressed transient uniform detection sensitivity pir detector

Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed