GB1358931A - Ultrasonic intrusion detector - Google Patents

Ultrasonic intrusion detector

Info

Publication number
GB1358931A
GB1358931A GB3952571A GB3952571A GB1358931A GB 1358931 A GB1358931 A GB 1358931A GB 3952571 A GB3952571 A GB 3952571A GB 3952571 A GB3952571 A GB 3952571A GB 1358931 A GB1358931 A GB 1358931A
Authority
GB
United Kingdom
Prior art keywords
spectrum
signals
positive
negative
output
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
GB3952571A
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.)
Filing date
Publication date
Application filed by AEROSPACE RES filed Critical AEROSPACE RES
Publication of GB1358931A publication Critical patent/GB1358931A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/522—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves
    • G01S13/524—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi
    • G01S13/53—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi performing filtering on a single spectral line and associated with one or more range gates with a phase detector or a frequency mixer to extract the Doppler information, e.g. pulse Doppler radar
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Acoustics & Sound (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1358931 Ultrasonic Doppler devices AEROSPACE RESEARCH Inc 24 Aug 1971 [3 Sept 1970] 39525/71 Heading H4D [Also in Division G4] An ultrasonic alarm system wherein a space to be supervised is illuminated by ultrasonic radiation which is reflected back, received and processed employs means for distinguishing a Doppler shift spectrum caused by background "interference", e.g. convection currents, traffic vibration, &c. from such a spectrum caused by the movement of an intruder within the space by detecting whether the spectrum is symmetrical or asymmetrical about the carrier frequency. It is stated that such a symmetrical spectrum, (13) Fig. 1B, (not shown), is produced only by interference and in a first embodiment, Fig. 2, the received signal at 24 is compared at 26 with a reference to produce signals at 28, 30 whenever the received signal lies in an upper sideband or lower sideband respectively. The outputs are full wave rectified at 34, 38, to yield respectively a positive and negative signal which are summed at 40 and integrated at 42 to activate an alarm 46 whenever a threshold 44 is exceeded. In the event only of a symmetrical Doppler spectrum, the signals in the summer and integrator will yield zero over any integrating period. The second embodiment, Fig. 6, the received signal is mixed with two quadrature reference signals, Fig. 4 (not shown), and the two resultant envelope signals are added and subtracted to form two signals proportional to Cos #t and sin #t where # is proportional to an instantaneous Doppler shift. If 0 is positive then the one wave will lead the other and vice versa if # is negative. The two signals are filtered at 86, 88 and compared with ground potential at 90, 92 to produce positive or negative outputs which are taken as inputs to a flip-flop 94, one acting as a clocking input to display at the output Q the polarity applied at D at the clocking instant. If the signal at D is leading that at clock, then the Q output will always be positive and vice-versa when D is lagging. The output Q causes corresponding one of two positive or negative full wave rectified detector outputs indicative of the instant Doppler level 102, 104 to be passed to the integrator 98 and thence via threshold 100 to an alarm. If the spectrum is asymmetrical, on more occasions will one signal lead or lag the other than vice-versa and an output alarm is produced.
GB3952571A 1970-09-03 1971-08-24 Ultrasonic intrusion detector Expired GB1358931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6930670A 1970-09-03 1970-09-03

Publications (1)

Publication Number Publication Date
GB1358931A true GB1358931A (en) 1974-07-03

Family

ID=22088079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3952571A Expired GB1358931A (en) 1970-09-03 1971-08-24 Ultrasonic intrusion detector

Country Status (6)

Country Link
US (1) US3665443A (en)
JP (1) JPS5637596B1 (en)
DE (1) DE2144050C3 (en)
FR (1) FR2105225B1 (en)
GB (1) GB1358931A (en)
SE (1) SE368291B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526666A (en) * 2014-03-31 2015-12-02 Korea Electronics Telecomm Security monitoring apparatus and method using correlation coefficient variation pattern of sound field spectrum

Families Citing this family (36)

* 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
US3976988A (en) * 1973-03-23 1976-08-24 Uro Denshi Kogyo Kabushiki Kaisha Ultrasonic wave type alarm device
US3846778A (en) * 1973-06-21 1974-11-05 Aerospace Res Combined ultrasonic and electromagnetic intrusion alarm system
US3828336A (en) * 1973-07-12 1974-08-06 Dynamics Corp Massa Div Intrusion alarm system with improved air turbulence compensation
US3967283A (en) * 1974-02-13 1976-06-29 Automation Industries, Inc. Large area motion sensor
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
US3922660A (en) * 1974-12-12 1975-11-25 American District Telegraph Co Volumetric intrusion alarm using both Doppler and net-change signal processing
US4009476A (en) * 1975-06-27 1977-02-22 Solfan Security Systems Apparatus for automatically controlling door operation
US4114146A (en) * 1975-09-13 1978-09-12 Matsushita Electric Works, Ltd. Ultrasonic wave watching device of moving object detecting type
US4195289A (en) * 1975-12-03 1980-03-25 I.E.I. Proprietary Limited Microwave intrusion or movement detectors
US4092636A (en) * 1976-07-14 1978-05-30 Texas Instruments Incorporated Protective alarm system for window using reflected microwave energy
US4080594A (en) * 1976-07-14 1978-03-21 Plevy Arthur L Doppler shift actuator and intrusion systems
US4193055A (en) * 1977-03-11 1980-03-11 Charly Barnum Automatic sensitivity level adjustment
GB1598437A (en) * 1977-05-02 1981-09-23 Plessey Co Ltd Radar signal processors
US4213196A (en) * 1978-02-21 1980-07-15 Matsushita Electric Works, Ltd. Ultrasonic type motion detector
JPS5563774A (en) * 1978-11-08 1980-05-14 Matsushita Electric Works Ltd Detector for moving body
US4319349A (en) * 1978-09-29 1982-03-09 Pittway Corporation Ultrasonic intrusion detection system
US4760398A (en) * 1981-09-30 1988-07-26 The Boeing Company Methods and apparatus for determining the differential sideband power of radar signals
US4575723A (en) * 1982-02-16 1986-03-11 The United States Of America As Represented By The Secretary Of The Navy Foliage clutter rejector
JPS60136585U (en) * 1984-02-21 1985-09-10 コビシ電機株式会社 Disaster prevention horn
US4647913A (en) * 1985-01-15 1987-03-03 American District Telegraph Company Self-diagnostic ultrasonic intrusion detection system
US4728935A (en) * 1986-04-11 1988-03-01 Adt, Inc. Integrity securing monitor and method for a security installation
US4961039A (en) * 1987-04-03 1990-10-02 Matsushita Electric Works, Ltd. Moving object detecting device
US4807255A (en) * 1987-08-19 1989-02-21 Idland Carsten H Alarm system responsive to intrusion induced phase unbalance
US5150099A (en) * 1990-07-19 1992-09-22 Lienau Richard M Home security system and methodology for implementing the same
EP0494349A3 (en) * 1991-01-11 1992-11-19 Telefunken Systemtechnik Gmbh Sensor for an interior, particularly in a motor vehicle
JP3217566B2 (en) * 1993-12-28 2001-10-09 富士通株式会社 Continuous wave radar
GB9702242D0 (en) * 1997-02-04 1997-03-26 Plessey Semiconductors Ltd Alarm sensor and antenna arrangement
US6959154B1 (en) * 2000-11-28 2005-10-25 At&T Corp. Diversity receiver for mitigating the effects of fiber dispersion by separate detection of the two transmitted sidebands
US7821870B2 (en) * 2005-08-19 2010-10-26 Mitsubishi Electric Research Laboratories Inc. Method and system for identifying moving objects using acoustic signals
ATE397330T1 (en) * 2006-02-20 2008-06-15 Alcatel Lucent COMPENSATION CONTROL OF THE DOUBLE EFFECT FOR RADIO TRANSMISSION
US20080119716A1 (en) * 2006-05-17 2008-05-22 Olga Boric-Lubecke Determining presence and/or physiological motion of one or more subjects with quadrature doppler radar receiver systems
KR20160057127A (en) * 2014-11-13 2016-05-23 삼성전자주식회사 Display apparatus and control method thereof
US10317528B2 (en) * 2016-03-03 2019-06-11 Microchip Technology Incorporated Core independent ultrasonic proximity sensing peripheral
US11922792B2 (en) 2019-02-22 2024-03-05 Signify Holding B.V. Luminaire, and a corresponding method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR45398E (en) * 1933-08-03 1935-07-26 Improvements in light traps for insects, in particular those comprising a light source emitting ultra-violet rays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526666A (en) * 2014-03-31 2015-12-02 Korea Electronics Telecomm Security monitoring apparatus and method using correlation coefficient variation pattern of sound field spectrum
GB2526666B (en) * 2014-03-31 2016-12-07 Electronics & Telecommunications Res Inst Security monitoring apparatus and method using correlation coefficient variation pattern of sound field spectrum
US9613508B2 (en) 2014-03-31 2017-04-04 Electronics And Telecommunications Research Institute Security monitoring apparatus and method using correlation coefficient variation pattern of sound field spectrum

Also Published As

Publication number Publication date
FR2105225B1 (en) 1975-09-26
DE2144050A1 (en) 1972-03-09
JPS5637596B1 (en) 1981-09-01
DE2144050B2 (en) 1974-11-14
DE2144050C3 (en) 1975-07-03
US3665443A (en) 1972-05-23
FR2105225A1 (en) 1972-04-28
SE368291B (en) 1974-06-24

Similar Documents

Publication Publication Date Title
GB1358931A (en) Ultrasonic intrusion detector
GB1303554A (en)
GB1388239A (en) Navigation and transmitter monitor system
GB1093509A (en) Clear air turbulence detection
GB1452499A (en) Electromagnetic intrustion detection system
GB763196A (en) Moving target indicator pulse radar systems
GB1349678A (en) Underwater direction finding system
GB1230046A (en)
US3603996A (en) Means and method for detecting doppler signals submerged in clutter
GB1301227A (en)
GB964176A (en) A data transmission arrangement utilising phase shift carrier signalling
GB1433540A (en) Phase detector circuits
GB626236A (en) Improvements in or relating to radar systems
GB1284674A (en) Turbulence compensated intruder detector
US2492012A (en) Radio frequency system for altitude or distance measurement
GB1421342A (en) Phase measurement system with synchronized demodulation
GB1003317A (en) Radio navigational system
GB1395356A (en) Direction finder
GB1253895A (en) Improvements in or relating to aircraft landing radio guidance receivers
GB1031596A (en) Improvements in or relating to suppressed carrier transmission systems
JPS5429528A (en) Magnetic pattern detector
GB1427604A (en) Phasemeter
GB1219410A (en) Radio navigation equipment
GB928564A (en) Improvements in or relating to devices for determining the displacement of an objectrelative to another
GB1233168A (en)

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee