EP0026383A1 - Alarmsystem für den Schutz von Glasflächen, insbesondere Schaufensterscheiben - Google Patents

Alarmsystem für den Schutz von Glasflächen, insbesondere Schaufensterscheiben Download PDF

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Publication number
EP0026383A1
EP0026383A1 EP80105486A EP80105486A EP0026383A1 EP 0026383 A1 EP0026383 A1 EP 0026383A1 EP 80105486 A EP80105486 A EP 80105486A EP 80105486 A EP80105486 A EP 80105486A EP 0026383 A1 EP0026383 A1 EP 0026383A1
Authority
EP
European Patent Office
Prior art keywords
alarm system
pane
signal
received
memory
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.)
Withdrawn
Application number
EP80105486A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hartmut Engel
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
Publication of EP0026383A1 publication Critical patent/EP0026383A1/de
Withdrawn legal-status Critical Current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
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass

Definitions

  • the invention relates to an alarm system as specified in the preamble of claim 1.
  • 1 denotes a pane to be protected.
  • 2 and 3 designate a known structure-borne sound transmitter and receiver, both of which are known for transmitting acoustic structure-borne sound waves between the transmitter 2 and the pane 1 or between the pane 1 and the receiver 3 on the pane. ter way are attached.
  • An ultrasonic oscillator made of piezoceramic material is preferably used for the transmitter 2. The vibrator is allowed to vibrate at a resonance frequency.
  • the receiver 3 it is recommended to use the same ultrasonic transducer. how to use for the transmitter 2, with which the requirement of matching frequency position for transmission and reception can be met in a simple manner.
  • Fig. 4 shows a block diagram of the electronics of a alarm system according to the invention.
  • 1 is again the glass pane to be protected, with 2 is the transmitter converter and with 3 is the receiver converter. designated.
  • the transmitter transducer 2 and the receiver transducer 3 can also be one and the same ultrasound transducer and, in the normal case, the signal reflected at the edges of the pane 1 is received by the receiver transducer 3.
  • 3 relates to such an embodiment and shows echo signals.
  • a generator for the ultrasound transmission signal is designated by 11.
  • a time clock is indicated by 12, the output clock signals of which reach the gate circuit 14 via a divider 13.
  • a transmit pulse from the generator 11 is fed to the transmit converter 2.
  • the time clock pulses of the time clock 12 also go to a counter 15, in which the clock pulses of the time clock 12 are divided into, for example, eight lines 115.
  • the reception signal of the reception transducer 3 goes to an analog-digital converter 23 via an amplifier 21 and a filter 22.
  • the filter 22 is in particular a bandpass filter which is tuned to the ultrasound frequency.
  • the filter 22 also preferably has an amplitude-limiting effect.
  • the 24 denotes a memory, to which the output signal of the analog-to-digital converter 23 and the divided time clock pulses are fed in accordance with the lines 115.
  • the output signal of the analog-digital converter 23, ie the converted received signal arrives in the memory, in accordance with the time pulse pulse in temporally successive division into eight memory cells.
  • the signal component of the time range t 2 -t 1 shown in FIG. 2 is thus fed to the first memory cell.
  • the signal component of the time range t3 - t 2 is accordingly fed to the second memory cell the following memory cells are stored.
  • a correspondingly higher detector sensitivity can be achieved by a larger number of time ranges provided in accordance with the distribution of the received signal.
  • the mode of operation of the alarm system in FIG. 4 is that first of all a received undisturbed reception signal (corresponding to the broken line of the switch 25) is written into the memory 24. This is done e.g. with the commissioning of the alarm system.
  • a mean value signal of a plurality of successive undisturbed reception signals can also be provided as the written signal for the upper line of the memory 24.
  • the invention is particularly suitable for protecting glass surfaces.
  • the system according to the invention can also be used to protect other surfaces, such as doors, paneling and the like, in which an ultrasound propagation, as is necessary here, with spatial limitation (reflection of the ultrasound) is possible at the edge.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Burglar Alarm Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Glass Compositions (AREA)
EP80105486A 1979-09-26 1980-09-12 Alarmsystem für den Schutz von Glasflächen, insbesondere Schaufensterscheiben Withdrawn EP0026383A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792938968 DE2938968A1 (de) 1979-09-26 1979-09-26 Alarmsystem fuer den schutz von glasflaechen, insbesondere schaufensterscheiben
DE2938968 1979-09-26

Publications (1)

Publication Number Publication Date
EP0026383A1 true EP0026383A1 (de) 1981-04-08

Family

ID=6081903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105486A Withdrawn EP0026383A1 (de) 1979-09-26 1980-09-12 Alarmsystem für den Schutz von Glasflächen, insbesondere Schaufensterscheiben

Country Status (5)

Country Link
EP (1) EP0026383A1 (da)
DE (1) DE2938968A1 (da)
DK (1) DK405480A (da)
FI (1) FI803019A (da)
NO (1) NO802797L (da)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143976A (en) * 1983-07-14 1985-02-20 Shorrock Security Systems Ltd Window glass breakage detector apparatus
EP0181464A2 (de) * 1984-09-21 1986-05-21 Siemens Aktiengesellschaft Überwachungseinrichtung für Stäbe eines Zaunes bzw. Grobrechens
EP0278538A1 (en) * 1987-01-19 1988-08-17 Koninklijke Philips Electronics N.V. Monitor device
WO1988006774A1 (en) * 1987-03-06 1988-09-07 Lars Eriksson Alarm apparatus, preferably in a window structure
EP1072902A2 (en) * 1999-07-30 2001-01-31 Meritor Light Vehicle Systems, Inc. Method and system for detecting an object in the path of a vehicle power window system using acoustic signals
EP1002922A3 (en) * 1998-11-18 2002-03-06 Delphi Technologies, Inc. Device to protect against jamming limbs in power windows in motor vehicles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE38573T1 (de) * 1984-04-30 1988-11-15 Fuss Fritz Gmbh & Co Glasbruchsensor.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624035A1 (de) * 1975-05-29 1976-12-02 Matsushita Electric Ind Co Ltd Vorrichtung zum erfassen des brechens einer glasscheibe
DE2541764A1 (de) * 1975-09-19 1977-03-24 Philips Patentverwaltung Ueberwachungsanordnung fuer beschaedigungen an groesseren scheiben mit einer ultraschallvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2624035A1 (de) * 1975-05-29 1976-12-02 Matsushita Electric Ind Co Ltd Vorrichtung zum erfassen des brechens einer glasscheibe
FR2312827A1 (fr) * 1975-05-29 1976-12-24 Matsushita Electric Ind Co Ltd Detecteur de bris de vitre
DE2541764A1 (de) * 1975-09-19 1977-03-24 Philips Patentverwaltung Ueberwachungsanordnung fuer beschaedigungen an groesseren scheiben mit einer ultraschallvorrichtung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143976A (en) * 1983-07-14 1985-02-20 Shorrock Security Systems Ltd Window glass breakage detector apparatus
EP0181464A2 (de) * 1984-09-21 1986-05-21 Siemens Aktiengesellschaft Überwachungseinrichtung für Stäbe eines Zaunes bzw. Grobrechens
EP0181464A3 (de) * 1984-09-21 1988-07-20 Siemens Aktiengesellschaft Überwachungseinrichtung für Stäbe eines Zaunes bzw. Grobrechens
EP0278538A1 (en) * 1987-01-19 1988-08-17 Koninklijke Philips Electronics N.V. Monitor device
US4907175A (en) * 1987-01-19 1990-03-06 U.S. Philips Corporation Monitoring device
WO1988006774A1 (en) * 1987-03-06 1988-09-07 Lars Eriksson Alarm apparatus, preferably in a window structure
EP1002922A3 (en) * 1998-11-18 2002-03-06 Delphi Technologies, Inc. Device to protect against jamming limbs in power windows in motor vehicles
EP1072902A2 (en) * 1999-07-30 2001-01-31 Meritor Light Vehicle Systems, Inc. Method and system for detecting an object in the path of a vehicle power window system using acoustic signals
EP1072902A3 (en) * 1999-07-30 2002-08-21 Meritor Light Vehicle Systems, Inc. Method and system for detecting an object in the path of a vehicle power window system using acoustic signals

Also Published As

Publication number Publication date
NO802797L (no) 1981-03-27
DK405480A (da) 1981-03-27
DE2938968A1 (de) 1981-07-02
FI803019A (fi) 1981-03-27

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT NL SE

17P Request for examination filed

Effective date: 19811002

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830929

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ENGEL, HARTMUT