GB1448336A – Intrusion detection system
– Google Patents
GB1448336A – Intrusion detection system
– Google Patents
Intrusion detection system
Info
Publication number
GB1448336A
GB1448336A
GB2300974A
GB2300974A
GB1448336A
GB 1448336 A
GB1448336 A
GB 1448336A
GB 2300974 A
GB2300974 A
GB 2300974A
GB 2300974 A
GB2300974 A
GB 2300974A
GB 1448336 A
GB1448336 A
GB 1448336A
Authority
GB
United Kingdom
Prior art keywords
signals
frequency
arrangement
signal
surveillance
Prior art date
1973-06-21
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
GB2300974A
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.)
AEROSPACE RES
Original Assignee
AEROSPACE RES
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.)
1973-06-21
Filing date
1974-05-23
Publication date
1976-09-02
1974-05-23
Application filed by AEROSPACE RES
filed
Critical
AEROSPACE RES
1976-09-02
Publication of GB1448336A
publication
Critical
patent/GB1448336A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
238000001514
detection method
Methods
0.000
title
1
230000005540
biological transmission
Effects
0.000
abstract
2
230000010363
phase shift
Effects
0.000
abstract
1
Classifications
G—PHYSICS
G08—SIGNALLING
G08B—SIGNALLING OR 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
G08B13/2494—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field by interference with electro-magnetic field distribution combined with other electrical sensor means, e.g. microwave detectors combined with other sensor means
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
G08B13/1645—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means and other detection means, e.g. microwave or infrared radiation
Abstract
1448336 Intruder alarms AEROSPACE RESEARCH Inc 23 May 1974 [21 June 1973] 23009/74 Heading G4N [Also in Division H4] An intruder alarm system comprises an arrangement 24, 30 for transmitting and receiving an electromagnetic signal of a first frequency into a zone of surveillance an arrangement 12, 14 for transmitting and receiving an ultrasonic signal of a second frequency into a zone of surveillance, the electromagnetic and ultrasonic signals being related in frequency to have approximately identical wavelengths in air, a frequency shifter 28, 32 operative in response to either one only or both of the signals to provide signals of a common frequency, a common signal processing circuitry including an arrangement for establishing a threshold representative of the undisturbed state of the zones and providing an alarm indication in the presence of a moving target. The system may be operated with transmission of a selected one of the two signals only or with simultaneous transmission of the signals and the monitored zones may be different, overlapping or the same. As the wavelengths of the two types of signals are the same, they undergo identical Doppler phase shifts. Figs. 2, 3 (not shown) relate to different types of frequency offsetting devices and the signal processing circuitry of Fig. 4 (not shown) includes a signal integrator.
GB2300974A
1973-06-21
1974-05-23
Intrusion detection system
Expired
GB1448336A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00372193A
US3846778A
(en)
1973-06-21
1973-06-21
Combined ultrasonic and electromagnetic intrusion alarm system
Publications (1)
Publication Number
Publication Date
GB1448336A
true
GB1448336A
(en)
1976-09-02
Family
ID=23467093
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2300974A
Expired
GB1448336A
(en)
1973-06-21
1974-05-23
Intrusion detection system
Country Status (6)
Country
Link
US
(1)
US3846778A
(en)
JP
(1)
JPS5322040B2
(en)
AU
(1)
AU6938774A
(en)
DE
(1)
DE2429518A1
(en)
FR
(1)
FR2234620B3
(en)
GB
(1)
GB1448336A
(en)
Families Citing this family (20)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3942178A
(en)
*
1974-03-27
1976-03-02
Sontrix, Inc.
Intrusion detection system
USRE30288E
(en)
*
1974-03-27
1980-05-27
Pittway Corporation
Intrusion detection system
DE2613845C3
(en)
*
1976-03-31
1979-06-28
Siemens Ag, 1000 Berlin Und 8000 Muenchen
Burglar alarm device evaluating the Doppler shift of the reflection of electromagnetic and ultrasonic radiation
CA1084618A
(en)
*
1976-11-10
1980-08-26
Martin T. Cole
Phase difference sensitive movement detectors
DE2656399C3
(en)
*
1976-12-13
1979-10-11
Siemens Ag, 1000 Berlin Und 8000 Muenchen
Circuit arrangement for a burglar alarm device with coincidence operation of an ultrasonic and an electromagnetic Doppler device
JPS5420699A
(en)
*
1977-07-15
1979-02-16
Matsushita Electric Works Ltd
Ultrasonic alert device
GB1580406A
(en)
*
1977-04-22
1980-12-03
Eurolec Group Ltd
Ultrasonic detection system
US4254483A
(en)
*
1978-01-30
1981-03-03
Atronic Corporation
Ultrasonic intrusion alarm system
DE3001452A1
(en)
*
1980-01-16
1981-07-23
Hans-Günther 8100 Garmisch-Partenkirchen Stadelmayr
ALARM, SECURING AND MONITORING SYSTEM
US4760398A
(en)
*
1981-09-30
1988-07-26
The Boeing Company
Methods and apparatus for determining the differential sideband power of radar signals
US4635058A
(en)
*
1983-12-14
1987-01-06
Rca Corporation
Vehicle identification system using radar and acoustic information
US4625199A
(en)
*
1985-01-14
1986-11-25
American District Telegraph Company
Combination intrusion detector system having correlated ultrasonic and microwave detection sub-systems
US4609909A
(en)
*
1985-03-04
1986-09-02
Gte Government Systems Corporation
Multimode perimeter intrusion detection system
US4807255A
(en)
*
1987-08-19
1989-02-21
Idland Carsten H
Alarm system responsive to intrusion induced phase unbalance
US5638048A
(en)
*
1995-02-09
1997-06-10
Curry; Robert C.
Alarm system for swimming pools
US6307475B1
(en)
*
1999-02-26
2001-10-23
Eric D. Kelley
Location method and system for detecting movement within a building
JP4214199B2
(en)
2001-11-19
2009-01-28
株式会社デンソー
Vehicle door unlocking device
WO2007047419A2
(en)
*
2005-10-14
2007-04-26
Bae Systems Information And Electronic Systems Integration Inc.
Motion detection system using cw radar in combination with additional sensors
US20080077015A1
(en)
*
2006-05-17
2008-03-27
Olga Boric-Lubecke
Determining presence and/or physiological motion of one or more subjects with multiple receiver Doppler radar systems
JP2009225423A
(en)
*
2008-02-21
2009-10-01
Seiko Epson Corp
Wireless communication system, transmission device, receiving device and information processing device
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3665443A
(en)
*
1970-09-03
1972-05-23
Aerospace Res
Ultrasonic intrusion alarm
US3727216A
(en)
*
1971-01-28
1973-04-10
Mosler Safe Co
Electromagnetic and ultrasonic doppler correlation intrusion alarm system
US3801978A
(en)
*
1972-07-20
1974-04-02
E Systems Inc
Ultrasonic-microwave doppler intrusion alarm system
1973
1973-06-21
US
US00372193A
patent/US3846778A/en
not_active
Expired – Lifetime
1974
1974-05-23
GB
GB2300974A
patent/GB1448336A/en
not_active
Expired
1974-05-27
AU
AU69387/74A
patent/AU6938774A/en
not_active
Expired
1974-06-08
JP
JP6550174A
patent/JPS5322040B2/ja
not_active
Expired
1974-06-11
FR
FR7420150A
patent/FR2234620B3/fr
not_active
Expired
1974-06-20
DE
DE2429518A
patent/DE2429518A1/en
active
Pending
Also Published As
Publication number
Publication date
JPS5034199A
(en)
1975-04-02
AU6938774A
(en)
1975-11-27
FR2234620A1
(en)
1975-01-17
FR2234620B3
(en)
1977-04-08
DE2429518A1
(en)
1975-01-23
US3846778A
(en)
1974-11-05
JPS5322040B2
(en)
1978-07-06
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Legal Events
Date
Code
Title
Description
1977-01-13
PS
Patent sealed [section 19, patents act 1949]
1978-12-29
PCNP
Patent ceased through non-payment of renewal fee
