EP0446385A1 - Système de surveillance à ultrasons pour la detection d'intrusion - Google Patents

Système de surveillance à ultrasons pour la detection d'intrusion Download PDF

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Publication number
EP0446385A1
EP0446385A1 EP90104681A EP90104681A EP0446385A1 EP 0446385 A1 EP0446385 A1 EP 0446385A1 EP 90104681 A EP90104681 A EP 90104681A EP 90104681 A EP90104681 A EP 90104681A EP 0446385 A1 EP0446385 A1 EP 0446385A1
Authority
EP
European Patent Office
Prior art keywords
ultrasound
monitoring system
ultrasonic
distance
echo signals
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.)
Granted
Application number
EP90104681A
Other languages
German (de)
English (en)
Other versions
EP0446385B1 (fr
Inventor
Bernhard Hering Dipl.-Phys Dr. Hering
Konrad Kraus
Harald Dipl.-Ing. Schermann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE59009633T priority Critical patent/DE59009633D1/de
Priority to DK90104681.3T priority patent/DK0446385T3/da
Priority to EP90104681A priority patent/EP0446385B1/fr
Priority to ES90104681T priority patent/ES2075857T3/es
Priority to AT90104681T priority patent/ATE127603T1/de
Publication of EP0446385A1 publication Critical patent/EP0446385A1/fr
Application granted granted Critical
Publication of EP0446385B1 publication Critical patent/EP0446385B1/fr
Priority to GR950402525T priority patent/GR3017397T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G08B13/1636—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using pulse-type detection circuits

Definitions

  • the invention relates to an ultrasound monitoring system for an intrusion detection system with at least one ultrasound motion detector and an evaluation device.
  • the occurrence of Doppler frequencies is not evaluated, but rather a quantitative evaluation of the phase position of the reflected signal is carried out to determine a radial net path.
  • An alarm is only triggered if the object has covered a predetermined distance in the direction of the sensor or ultrasonic detector to or from the sensor. This ensures that false alarms caused by air streaks and objects moving back and forth can be almost completely ruled out.
  • a burglar alarm system of this type can, however, disadvantageously be outwitted by an intruder if he takes the so-called vocational step, i.e. two steps forward, one step back, or outsmarted by a very slow process. Likewise, no tangential directions of movement can be recognized.
  • An ultrasound monitoring system in which short ultrasound pulse trains are emitted, brought improvements.
  • the received echoes of the pulse are evaluated in order of run time. This gives you an ultrasound profile of the room.
  • the distance of an object to the ultrasonic detector can be determined via the duration of the echoes. With simpler methods, only the amplitude of the echoes is evaluated as a function of the transit time, while with more complex methods the phase position is additionally evaluated.
  • An intrusion detection system that works according to this system can detect radial movements, ie movements on the Detect detectors to or from the detector very well. It is possible to eliminate objects that are detected in the vicinity of the detector, so that the false alarm rates can be reduced.
  • this known system reacts only very weakly to tangential directions of movement.
  • the object of the invention is to develop an ultrasound monitoring system for an intruder alarm system in such a way that the above-mentioned disadvantages can be avoided and that reliable and reliable detection of an intruder is ensured, faults or manipulations being recognized and the false alarm rate being able to be reduced.
  • an ultrasound monitoring system mentioned at the outset in that at least one ultrasound transmitter and at least two ultrasound receivers are aligned to a common monitoring area, that in a corresponding signal processing and evaluation device, using a microcomputer, the distance and direction of a moving one from the received echo signals by means of a microcomputer Object is determined and a movement track is formed therefrom, and that a criterion for an alarm is derived from the length and shape of the movement track.
  • the distance from the transit time differences and the direction from the phase differences of the received and electronically processed echo signals are expediently determined.
  • the ultrasound monitoring system has two microphones that receive the echo signals and feed them to a signal processing and evaluation device for further processing.
  • a short pulse train of sinusoidal signals is expediently emitted by the ultrasound transmitter and the returning echoes are electronically processed and digitized at short intervals and then further processed in an evaluation computer.
  • the next pulse train is transmitted. This time interval depends on the depth of the interstitial space.
  • the received signals pass through an adjustable amplifier, mixer and integrator for electronic processing.
  • the integrators for example, four measured values are available for each time period, the time of which is determined as a function of the desired spatial resolution, from which the amplitude and phase position of the received signal for both microphones and receivers are calculated in the microcomputer. If, for example, there is an object in the plane of symmetry in front of the two microphones, the echoes in both microphones are the same in terms of amplitude and phase. For objects outside the plane of symmetry, there are small differences in the transit time of the echoes to the microphones, which can be measured as different phase positions. The direction is calculated from the phase difference of the echoes and the distance of an object is calculated from the transit time. In this way, false alarms caused by objects moving back and forth are avoided, since essentially stationary objects are recognized as such and can be eliminated.
  • the sensitivity of the amplifier of the echo signals is controlled in a time-dependent manner.
  • An attempt at sabotage by covering the system, i.e. of the transmitter and / or the receiver is recognized as well as the failure of the transmitter / receiver because the echo profiles disappear and a fault is therefore recognized and displayed.
  • a transmitter S1 transmits at certain time intervals, e.g. every 60 msec., short pulse trains from sinusoidal signals.
  • the echo signals reflected by the monitoring area ÜB are received with two ultrasound receivers E1, E2 (microphones).
  • An object OB located in the monitoring area ÜB is in the direction of ⁇ ⁇ .
  • Distance e is determined, as will be explained in the following.
  • a signal processing and evaluation device SAE can be provided, as indicated in the block diagram according to FIG.
  • the transmission pulses IP are sent by the transmitter S1 in the monitoring area ÜB.
  • the clock is generated and the transmission pulses are controlled in a clock generation and control device TS, which is acted upon by the microcomputer ⁇ R.
  • the transmit pulses are amplified beforehand by the amplifier V3.
  • the received signals or echo signals ES reach the signal processing and evaluation device SAE via two receivers E1 and E2 and downstream amplifiers V1 and V2.
  • the received signals are amplified with a preamplifier V1 and V2 and then with a downstream controllable amplifier STC1 and STC2.
  • the transmission pulse train IP (1), the reception signal ES (2) and various control and processed reception signals are shown.
  • the controlled amplifiers STC1, STC2 are controlled by the clock generation and control device TS.
  • the control signal required for this is designated by (3) and shown in the diagram in Fig. 3 under (3). That from the controllable amplifier STC1 received echo is denoted by (4), shown in Fig.3 under (4), reaches the respective associated mixing stages, for example from the receiver E1 to the mixing stages M1 and M2.
  • These mixing stages M1 to M4 are also controlled by the clock generation and control device TS.
  • the control signals are designated (8) and (10) and are shown in the time diagram according to FIG.
  • the echo signals obtained from the respective mixers M1 and M2 are designated (9) and (11), are integrated in associated integrators I1 and I2, which are also controlled (7) by the clock generation and control logic TS, and on sample / hold Facilities SH1, SH2 given.
  • the integrated reception echoes (12) and (13) are digitized and processed in the microcomputer ⁇ R.
  • the signals from the output of the sample / hold device SH1, SH2 go to an analog-to-digital converter with multiplexer ADC / MUX.
  • the clock generation and control device TS controls (5) both the sample / hold device SH1 to SH4 and the analog / digital converter (6).
  • the corresponding control signals (5), (6) are also shown in the time diagram.
  • the time diagram according to FIG. 4 represents a section A of the diagram according to FIG. 3.
  • the electronically processed echo signals and signals evaluated in the microcomputer enable an intruder (object) to be detected by distance and direction and thus to record its movement track, so that an alarm condition can be derived from the length and shape of the movement track, which leads to the alarm being given (AL) .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
EP90104681A 1990-03-12 1990-03-12 Système de surveillance à ultrasons pour la detection d'intrusion Expired - Lifetime EP0446385B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE59009633T DE59009633D1 (de) 1990-03-12 1990-03-12 Ultraschall-Überwachungssystem für eine Einbruchmeldeanlage.
DK90104681.3T DK0446385T3 (da) 1990-03-12 1990-03-12 Ultralyd-overvågningssystem for et indbrudsmeldeanlæg
EP90104681A EP0446385B1 (fr) 1990-03-12 1990-03-12 Système de surveillance à ultrasons pour la detection d'intrusion
ES90104681T ES2075857T3 (es) 1990-03-12 1990-03-12 Sistema de control ultrasonico para una instalacion de alarma antirrobo.
AT90104681T ATE127603T1 (de) 1990-03-12 1990-03-12 Ultraschall-überwachungssystem für eine einbruchmeldeanlage.
GR950402525T GR3017397T3 (en) 1990-03-12 1995-09-13 Ultrasonic surveillance system for intruder detection.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90104681A EP0446385B1 (fr) 1990-03-12 1990-03-12 Système de surveillance à ultrasons pour la detection d'intrusion

Publications (2)

Publication Number Publication Date
EP0446385A1 true EP0446385A1 (fr) 1991-09-18
EP0446385B1 EP0446385B1 (fr) 1995-09-06

Family

ID=8203743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104681A Expired - Lifetime EP0446385B1 (fr) 1990-03-12 1990-03-12 Système de surveillance à ultrasons pour la detection d'intrusion

Country Status (6)

Country Link
EP (1) EP0446385B1 (fr)
AT (1) ATE127603T1 (fr)
DE (1) DE59009633D1 (fr)
DK (1) DK0446385T3 (fr)
ES (1) ES2075857T3 (fr)
GR (1) GR3017397T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306719A1 (en) * 1993-03-04 1993-09-16 Kloch Heilmann Hermann Self=learning alarm system for object monitoring - contains filtered image sensor and ultrasonic sensor used in combination
DE4306425C1 (de) * 1993-03-02 1994-05-19 Zettler Gmbh Melder für Bewegungsvorgänge
ITMO20120157A1 (it) * 2012-06-18 2013-12-19 Microlog S R L Sistema e metodo per il monitoraggio di flussi di persone
EP3043192A1 (fr) * 2015-01-08 2016-07-13 Delphi International Operations Luxembourg S.à r.l. Dispositif et procédé de surveillance par ultra-sons destinés à déterminer la direction de déplacement et/ou la vitesse de déplacement d'un objet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101441496B (zh) * 2007-11-22 2010-12-08 英业达股份有限公司 便携式计算机装置及其防盗的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1791060B2 (de) * 1968-09-05 1975-01-02 Alois Zettler Elektrotechnische Fabrik Gmbh, 8000 Muenchen Elektroakustische Anlage
US4114146A (en) * 1975-09-13 1978-09-12 Matsushita Electric Works, Ltd. Ultrasonic wave watching device of moving object detecting type
US4197528A (en) * 1977-04-22 1980-04-08 Eurolec Group Limited Movement-detecting processing circuit for an ultrasonic detection system
DE3805439A1 (de) * 1988-02-22 1989-09-07 Dotronic Mikroprozessortechnik Verfahren zur ueberwachung eines raumes gegen unbefugten eintritt mittels ultraschall

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1791060B2 (de) * 1968-09-05 1975-01-02 Alois Zettler Elektrotechnische Fabrik Gmbh, 8000 Muenchen Elektroakustische Anlage
US4114146A (en) * 1975-09-13 1978-09-12 Matsushita Electric Works, Ltd. Ultrasonic wave watching device of moving object detecting type
US4197528A (en) * 1977-04-22 1980-04-08 Eurolec Group Limited Movement-detecting processing circuit for an ultrasonic detection system
DE3805439A1 (de) * 1988-02-22 1989-09-07 Dotronic Mikroprozessortechnik Verfahren zur ueberwachung eines raumes gegen unbefugten eintritt mittels ultraschall

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306425C1 (de) * 1993-03-02 1994-05-19 Zettler Gmbh Melder für Bewegungsvorgänge
DE4306719A1 (en) * 1993-03-04 1993-09-16 Kloch Heilmann Hermann Self=learning alarm system for object monitoring - contains filtered image sensor and ultrasonic sensor used in combination
ITMO20120157A1 (it) * 2012-06-18 2013-12-19 Microlog S R L Sistema e metodo per il monitoraggio di flussi di persone
EP3043192A1 (fr) * 2015-01-08 2016-07-13 Delphi International Operations Luxembourg S.à r.l. Dispositif et procédé de surveillance par ultra-sons destinés à déterminer la direction de déplacement et/ou la vitesse de déplacement d'un objet
WO2016110566A1 (fr) * 2015-01-08 2016-07-14 Delphi International Operations Luxembourg S.À R.L. Dispositif de surveillance par ultrasons et procédé de determination de la direction de déplacement et/ou de la vitesse de déplacement d'un objet

Also Published As

Publication number Publication date
ES2075857T3 (es) 1995-10-16
ATE127603T1 (de) 1995-09-15
GR3017397T3 (en) 1995-12-31
DE59009633D1 (de) 1995-10-12
DK0446385T3 (da) 1996-01-15
EP0446385B1 (fr) 1995-09-06

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