GB1319092A – Ultrasonic motion detector device and method
– Google Patents
GB1319092A – Ultrasonic motion detector device and method
– Google Patents
Ultrasonic motion detector device and method
Info
Publication number
GB1319092A
GB1319092A
GB5448870A
GB5448870A
GB1319092A
GB 1319092 A
GB1319092 A
GB 1319092A
GB 5448870 A
GB5448870 A
GB 5448870A
GB 5448870 A
GB5448870 A
GB 5448870A
GB 1319092 A
GB1319092 A
GB 1319092A
Authority
GB
United Kingdom
Prior art keywords
modulation
integrator
nov
resistor
time constant
Prior art date
1969-11-17
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
GB5448870A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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.)
1969-11-17
Filing date
1970-11-16
Publication date
1973-05-31
1970-11-16
Application filed by Minnesota Mining and Manufacturing Co
filed
Critical
Minnesota Mining and Manufacturing Co
1973-05-31
Publication of GB1319092A
publication
Critical
patent/GB1319092A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
G01N29/4436—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison with a reference signal
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N29/02—Analysing fluids
G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
G01N29/42—Detecting the response signal, e.g. electronic circuits specially adapted therefor by frequency filtering or by tuning to resonant frequency
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
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N2291/00—Indexing codes associated with group G01N29/00
G01N2291/10—Number of transducers
G01N2291/102—Number of transducers one emitter, one receiver
Abstract
1319092 Intruder alarms; fire alarms MINNESOTA MINING & MFG CO 16 Nov 1970 [17 Nov 1969] 54488/70 Heading G4N An ultrasonic motion detector receiver responsive to acoustic energy from a carrier wave radiated into a space to be protected comprises an amplifier 36, Q2, a demodulator 40, a limiter Q4, Q5, a bandpass filter 45 and a circuit 60 capable of operating an alarm 61 in response to modulation on said received carrier within a predetermined frequency band and persisting for a predetermined period. The carrier frequency is preferably 40 kHz; active filter 26 having a pass band between 50 and 200 Hz so as to pass modulation due to movement of an intruder or turbulence due to a fire but to reject environmental noises. The integrator 58 has a discharge time constant due to resistor 70 much greater than the charging time constant due to resistor 66 so that a Schmitt circuit 60 will operate the alarm relay 61 in response to a predetermined number of positive half cycles of modulation signals passed by active filter 26. In Fig. 3 (not shown) integrator 56 uses the Miller principle and includes a feedback path to point E so as to adapt the limiting level to the threshhold noise level.
GB5448870A
1969-11-17
1970-11-16
Ultrasonic motion detector device and method
Expired
GB1319092A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US87717369A
1969-11-17
1969-11-17
Publications (1)
Publication Number
Publication Date
GB1319092A
true
GB1319092A
(en)
1973-05-31
Family
ID=25369411
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5448870A
Expired
GB1319092A
(en)
1969-11-17
1970-11-16
Ultrasonic motion detector device and method
Country Status (6)
Country
Link
US
(1)
US3662371A
(en)
JP
(1)
JPS4830199B1
(en)
DE
(1)
DE2056883A1
(en)
FR
(1)
FR2069471A5
(en)
GB
(1)
GB1319092A
(en)
NL
(1)
NL7016278A
(en)
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3824532A
(en)
*
1971-09-27
1974-07-16
Us Air Force
Seismic signal intrusion detection classification system
US3828336A
(en)
*
1973-07-12
1974-08-06
Dynamics Corp Massa Div
Intrusion alarm system with improved air turbulence compensation
JPS51126171A
(en)
*
1974-12-23
1976-11-04
Yokogawa Hewlett Packard Ltd
Detecting device of moving object
US4951045A
(en)
*
1989-03-29
1990-08-21
Intelligent Safety Technology, Inc.
Portable electronic warning device for temporary conditions
US5440290A
(en)
*
1993-06-07
1995-08-08
Tecsec Incorporated
Proximity detection device for protection of personnel against exposure to hazardous radio frequency radiation
WO1995001621A1
(en)
*
1993-06-30
1995-01-12
Sentrol, Inc.
Glass break detector having reduced susceptibility to false alarms
US5539705A
(en)
*
1994-10-27
1996-07-23
Martin Marietta Energy Systems, Inc.
Ultrasonic speech translator and communications system
US6353385B1
(en)
2000-08-25
2002-03-05
Hyperon Incorporated
Method and system for interfacing an intrusion detection system to a central alarm system
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3258762A
(en)
*
1966-06-28
Bistable multivibrator means
US2767393A
(en)
*
1953-08-03
1956-10-16
Kidde & Co Walter
Approach alarm system with unwanted signal elimination
US2782405A
(en)
*
1954-05-27
1957-02-19
Motorola Inc
Apparatus for detecting motion in a bconfined space
1969
1969-11-17
US
US877173A
patent/US3662371A/en
not_active
Expired – Lifetime
1970
1970-11-06
NL
NL7016278A
patent/NL7016278A/xx
unknown
1970-11-16
DE
DE19702056883
patent/DE2056883A1/en
active
Pending
1970-11-16
JP
JP45100956A
patent/JPS4830199B1/ja
active
Pending
1970-11-16
FR
FR7040939A
patent/FR2069471A5/fr
not_active
Expired
1970-11-16
GB
GB5448870A
patent/GB1319092A/en
not_active
Expired
Also Published As
Publication number
Publication date
JPS4830199B1
(en)
1973-09-18
US3662371A
(en)
1972-05-09
NL7016278A
(en)
1971-05-19
FR2069471A5
(en)
1971-09-03
DE2056883A1
(en)
1971-05-27
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Legal Events
Date
Code
Title
Description
1973-10-10
PS
Patent sealed [section 19, patents act 1949]
1979-06-13
PCNP
Patent ceased through non-payment of renewal fee
