GB1320993A - Intrusion alarm systems - Google Patents

Intrusion alarm systems

Info

Publication number
GB1320993A
GB1320993A GB2898671A GB2898671A GB1320993A GB 1320993 A GB1320993 A GB 1320993A GB 2898671 A GB2898671 A GB 2898671A GB 2898671 A GB2898671 A GB 2898671A GB 1320993 A GB1320993 A GB 1320993A
Authority
GB
United Kingdom
Prior art keywords
output
intruder
frequencies
frequency
operational amplifier
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
GB2898671A
Other languages
English (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.)
Systron Donner Corp
Original Assignee
Systron Donner 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 Systron Donner Corp filed Critical Systron Donner Corp
Publication of GB1320993A publication Critical patent/GB1320993A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/901—Noise or unwanted signal reduction in nonseismic receiving system

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
GB2898671A 1970-06-26 1971-06-21 Intrusion alarm systems Expired GB1320993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5023370A 1970-06-26 1970-06-26

Publications (1)

Publication Number Publication Date
GB1320993A true GB1320993A (en) 1973-06-20

Family

ID=21964106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2898671A Expired GB1320993A (en) 1970-06-26 1971-06-21 Intrusion alarm systems

Country Status (6)

Country Link
US (1) US3638210A (enExample)
JP (1) JPS5141480B1 (enExample)
CA (1) CA940222A (enExample)
DE (1) DE2131113A1 (enExample)
FR (1) FR2096792B1 (enExample)
GB (1) GB1320993A (enExample)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753116A (en) * 1970-10-20 1973-08-14 California Inst Of Techn Pocket size microwave radiation hazard detector
US3781859A (en) * 1972-04-19 1973-12-25 Seabroad Electric Controlled wave pattern ultrasonic burglar alarm
US3800270A (en) * 1972-07-12 1974-03-26 Johnson Service Co Piezoelectric acoustical transducer for transmitting and receiving
US3828336A (en) * 1973-07-12 1974-08-06 Dynamics Corp Massa Div Intrusion alarm system with improved air turbulence compensation
US3866198A (en) * 1973-10-17 1975-02-11 Leopold Cohen Ultrasonic intrusion detection systems employing turbulence discrimination
US4114146A (en) * 1975-09-13 1978-09-12 Matsushita Electric Works, Ltd. Ultrasonic wave watching device of moving object detecting type
US4129856A (en) * 1976-11-15 1978-12-12 Contronic Controls Limited Filter system and method for intrusion alarm
DE3138723A1 (de) * 1981-09-29 1983-04-07 Siemens AG, 1000 Berlin und 8000 München Echosignal-auswerteverfahren zur einbruchssicherung nach dem ultraschall-dopplerverfahren und schaltungsanordnung zur durchfuehrung des echosignal-auswerteverfahrens
GB8617124D0 (en) * 1986-07-15 1986-08-20 Mace R J Vehicle protection apparatus
GB2310720B (en) * 1996-02-29 2000-07-12 Denso Corp Intrusion detecting apparatus for a vehicle
KR20200096590A (ko) 2017-12-07 2020-08-12 퓨리파이 에이피에스 제어 루프에서 적어도 2차 필터를 갖는 증폭기
CN111448755A (zh) * 2017-12-07 2020-07-24 普立菲有限公司 具有带至少三阶网络的补偿器的放大器
KR20200096278A (ko) 2017-12-07 2020-08-11 퓨리파이 에이피에스 증폭기 회로

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714205A (en) * 1945-03-24 1955-07-26 Grayson Harry Radar apparatus for distinguishing between moving and stationary objects
US2655645A (en) * 1947-09-26 1953-10-13 Alertronic Corp Method and apparatus for detecting motion in a confined space
US2769972A (en) * 1954-03-15 1956-11-06 American District Telegraph Co Method and apparatus for detecting motion
US3081433A (en) * 1960-12-07 1963-03-12 Sperry Rand Corp Two-stage frequency detecting device employing a radiation sensitive input means
GB954536A (en) * 1961-08-05 1964-04-08 Sylvania Electric Prod Intrusion alarm system
US3242486A (en) * 1962-04-20 1966-03-22 Johnson Service Co Intrusion detection system
US3293631A (en) * 1962-12-03 1966-12-20 Honeywell Inc Detection apparatus
US3418649A (en) * 1966-02-18 1968-12-24 Boeing Co Intruder detection system
US3383678A (en) * 1966-12-23 1968-05-14 Advanced Devices Lab Inc Moving object detection system
US3452289A (en) * 1967-02-16 1969-06-24 Motorola Inc Differential amplifier circuits

Also Published As

Publication number Publication date
FR2096792B1 (enExample) 1975-02-21
CA940222A (en) 1974-01-15
DE2131113A1 (de) 1972-01-27
US3638210A (en) 1972-01-25
JPS5141480B1 (enExample) 1976-11-10
FR2096792A1 (enExample) 1972-02-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees