EP0121048A1 - Mise en place de circuit pour le contrôle du niveau d'interférence des détecteurs connectés dans une installation de détecteurs de danger - Google Patents

Mise en place de circuit pour le contrôle du niveau d'interférence des détecteurs connectés dans une installation de détecteurs de danger Download PDF

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Publication number
EP0121048A1
EP0121048A1 EP84101149A EP84101149A EP0121048A1 EP 0121048 A1 EP0121048 A1 EP 0121048A1 EP 84101149 A EP84101149 A EP 84101149A EP 84101149 A EP84101149 A EP 84101149A EP 0121048 A1 EP0121048 A1 EP 0121048A1
Authority
EP
European Patent Office
Prior art keywords
alarm
detector
circuit arrangement
threshold
arrangement according
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
EP84101149A
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German (de)
English (en)
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EP0121048B1 (fr
Inventor
Peter Dr. Phil. Waegli
Stefan Temperli
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.)
Cerberus AG
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Cerberus AG
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Filing date
Publication date
Application filed by Cerberus AG filed Critical Cerberus AG
Publication of EP0121048A1 publication Critical patent/EP0121048A1/fr
Application granted granted Critical
Publication of EP0121048B1 publication Critical patent/EP0121048B1/fr
Expired legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/22—Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement

Definitions

  • the invention relates to a circuit arrangement for monitoring the interference level of detectors which are arranged in a hazard detection system, each detector containing an alarm memory which is set in the event of an alarm and circuits which generate an alarm threshold and compare the signal from the detector detector with the alarm threshold .
  • Hazard detection systems are designed to report hazards such as break-ins, theft, fire, smoke, gases, etc. Special types of detectors have been developed for each of these dangers. So there are intrusion, fire, smoke, heat, gas detectors. These detectors can be installed in the alarm systems, and different types of detectors can be combined in one system. Such alarm systems must always be ready for operation. Therefore, they are checked for their functionality at certain intervals. This check applies to the entire system including the control center as well as to each individual detector. The functionality check also includes the display of the current status of each detector. If, for example, a detector has been brought into the alarm state, it must pass through the Be service personnel are reset so that they can function properly again.
  • the object of the invention is to recognize at an early stage the susceptibility to faults which result from both external and internal causes.
  • the test mode can be controlled on the detector itself or from the control center.
  • this interference level monitoring is also possible during the active operating time of the relevant detector.
  • the shift in the working point of the signal from the detector due to aging processes and sample scatter is constantly taken into account, so that a constant sensitivity to the alarm and fault alarm is always guaranteed.
  • the time t is plotted on the abscissa in FIG.
  • the ordinate shows the voltage U.
  • the operating point of the output signal, which the detector 4 of the detector generates due to environmental conditions such as fire, fire, radiation, etc., is shown in FIG. 1 as a straight line 1.
  • the output signal of the detector (FIG. 3) shows normal noise in the time interval t1.
  • the output signal of the detector shows an increased interference noise, which is caused by internal or external interference sources.
  • the threshold value 2 is exceeded, a fault alarm is triggered according to the invention. This is discussed in more detail in connection with FIG. 3.
  • the interference threshold 2 is only drawn on one side of the working point 1. This interference threshold can easily be double-sided.
  • An alarm is shown in the time interval t3. If the output signal exceeds the upper alarm threshold 3 and / or falls below the lower alarm threshold 3 ', an alarm is triggered using the circuit of FIG. 3.
  • the mode of operation of the invention is discussed below with reference to the exemplary embodiment in FIG. 3.
  • the detector 4 generates an output signal which corresponds to the environmental conditions. Under normal environmental conditions, the detector generates an output signal which is referred to in FIG. 1 (time t1) or in FIG. 2 as normal noise. In this case there is no evaluation in the circuit of FIG. 3.
  • the threshold value generator 5 generates the thresholds 2,2 ', 3,3' (FIG. 1, 2). Filters 7 and 18 filter the detector signal (Fig. 3)
  • the output signal of the detector now has higher amplitudes, as is shown in the period t2 in FIG. 1. These higher amplitudes pass through amplifier 6, line 8 into comparator 9, which compares them with thresholds 2, 2 '. If the output signal exceeds or falls below one of these thresholds, the comparator 9 generates a signal on the line 91, which reaches the logic circuit 92. This sets appropriate inputs when entering status signals Z1 the alarm memory 10 via the OR circuit 95. The alarm memory is set without alarm.
  • the status signals which are either programmed on the detector itself or transmitted from the control panel to the detector, indicate the status of the detector or the system, such as "switched on" or "test mode".
  • the alarm memory 10 outputs an output signal to the logic 11 which, in the presence of corresponding status signals Z2 (for example "switched on” or "test mode"), switches on a display 12 which is arranged on the detector.
  • This display can be visual or acoustic.
  • the F ig. 3 shows an LED display.
  • the alarm memory 10 outputs the same signal to the logic 13, which gives a corresponding signal to the control center or to other detectors via the output 131. This indicates that the detector is malfunctioning on itself and in the control center.
  • the detector signal passes through amplifiers 6, line 8 compared to the comparator 9 and is larmschwellen with the A.
  • the comparator 9 outputs on lines 94 an alarm signal to the logic circuits 11, 14 and 93.
  • the logic circuit 14 controls the input of suitable status signals Z3 ("switched on” or “test mode") the alarm relay 15, the contacts of which generate an alarm in the control center.
  • the logic circuit 93 sets the alarm memory 10 via the OR circuit 95 when suitable state signals Z4 (for example “switched on” or “test mode”) are input other detectors there.
  • FIG. 3 shows the constant power supply of the detector with the monitoring circuit 17.
  • the monitoring circuit 17 responds when the tolerance range of the supply voltage 16 falls below or is exceeded by any external circumstances. It gives a control signal to logic 14, which controls the alarm relay 15.
  • the contacts of the alarm relay 15 give the alarm the alarm that the detector is faulty due to poor power supply.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
EP84101149A 1983-03-04 1984-02-04 Mise en place de circuit pour le contrôle du niveau d'interférence des détecteurs connectés dans une installation de détecteurs de danger Expired EP0121048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH118283 1983-03-04
CH1182/83 1983-03-04

Publications (2)

Publication Number Publication Date
EP0121048A1 true EP0121048A1 (fr) 1984-10-10
EP0121048B1 EP0121048B1 (fr) 1987-05-06

Family

ID=4204416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101149A Expired EP0121048B1 (fr) 1983-03-04 1984-02-04 Mise en place de circuit pour le contrôle du niveau d'interférence des détecteurs connectés dans une installation de détecteurs de danger

Country Status (5)

Country Link
US (1) US4598271A (fr)
EP (1) EP0121048B1 (fr)
JP (1) JPS59168599A (fr)
CA (1) CA1205884A (fr)
DE (1) DE3463582D1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248298A1 (fr) * 1986-06-03 1987-12-09 Cerberus Ag Dispositif détecteur de danger
DE3904979A1 (de) * 1989-02-18 1990-08-23 Beyersdorf Hartwig Verfahren zum betrieb eines ionisationsrauchmelders und ionisationsrauchmelder
EP0405473A2 (fr) * 1989-06-28 1991-01-02 Pittway Corporation Détecteur à bas profil avec source multiface
US5189399A (en) * 1989-02-18 1993-02-23 Hartwig Beyersdorf Method of operating an ionization smoke alarm and ionization smoke alarm
WO1995005648A2 (fr) * 1993-08-19 1995-02-23 Sentrol, Inc. Systeme de detection de fumee presentant des caracteristiques d'autodiagnostic et possedant un capuchon d'admission de fumee remplaçable
EP0654771A1 (fr) * 1993-11-23 1995-05-24 Cerberus Ag Procédé pour éviter les fausses alarmes dans un système de détection d'incendie et dispositif pour la réalisation de la méthode
EP0841563A1 (fr) * 1996-11-06 1998-05-13 Zellweger Analytics Limited Dispositif de surveillance pour cellules électrochimiques
WO1998021079A1 (fr) * 1996-11-13 1998-05-22 Siemens Aktiengesellschaft Procede d'adaptation automatique des valeurs de consigne theoriques prescrites pour un dispositif de surveillance de zones a risques et dispositif permettant de mettre ledit procede en oeuvre
EP0903708A1 (fr) * 1997-08-09 1999-03-24 Siemens Building Technologies AG Détecteur d'incendie
WO1999067758A1 (fr) * 1998-06-22 1999-12-29 Martin Daumer Procede et dispositif pour detecter des derives, des sauts et/ou des points aberrants de valeurs de mesure
US6396405B1 (en) 1993-08-19 2002-05-28 General Electric Corporation Automatic verification of smoke detector operation within calibration limits
DE10104861A1 (de) * 2001-02-03 2002-11-21 Bosch Gmbh Robert Verfahren zur Branderkennung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063518A (en) * 1989-11-16 1991-11-05 Grumman Aerospace Corporation Alarm system for a crystal growing furnace
US5410492A (en) * 1992-01-29 1995-04-25 Arch Development Corporation Processing data base information having nonwhite noise
US5629872A (en) * 1992-01-29 1997-05-13 Arch Development Corporation System for monitoring an industrial process and determining sensor status
US5459675A (en) * 1992-01-29 1995-10-17 Arch Development Corporation System for monitoring an industrial process and determining sensor status
US5586066A (en) * 1994-06-08 1996-12-17 Arch Development Corporation Surveillance of industrial processes with correlated parameters
US5761090A (en) * 1995-10-10 1998-06-02 The University Of Chicago Expert system for testing industrial processes and determining sensor status
US6741919B1 (en) * 2003-02-26 2004-05-25 General Electric Company Methods and apparatus for detecting impending sensor failure
EP2611278A2 (fr) 2010-07-06 2013-07-10 Forage Innovations B.V. Râteau rotatif possédant une bande support en matière plastique pour les dents

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341087A1 (de) * 1973-08-14 1975-02-27 Siemens Ag Automatische brandmeldeanlage
GB1529947A (en) * 1976-07-09 1978-10-25 Munford & White Ltd Ultra-sonic intruder alarms
EP0004911A1 (fr) * 1978-04-19 1979-10-31 Siemens Aktiengesellschaft Avertisseur de danger
EP0058824A2 (fr) * 1981-02-25 1982-09-01 Auergesellschaft Gmbh Dispositif pour maintenir la condition d'alarme d'un appareil-détecteur de gaz
EP0070449A1 (fr) * 1981-07-10 1983-01-26 Siemens Aktiengesellschaft Procédé et dispositif pour l'élévation de la sensibilité de réaction et de la sécurité contre les perturbations dans une installation détectrice de danger et particulièrement d'incendie

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051467A (en) * 1976-02-05 1977-09-27 American District Telegraph Company Fluid flow detector for a fire alarm system
JPS5829558B2 (ja) * 1977-05-23 1983-06-23 ホーチキ株式会社 減光式感知器
ZA785255B (en) * 1978-09-15 1979-12-27 Anglo Amer Corp South Africa Alarm system
US4348661A (en) * 1978-11-22 1982-09-07 J. C. Penney Company, Inc. Self-balancing alarm system
US4333093A (en) * 1980-04-28 1982-06-01 Baker Industries, Inc. Intrusion detection system
US4470047A (en) * 1982-02-04 1984-09-04 Baker Industries, Inc. Bidirectional, interactive fire detection system
DE3120986A1 (de) * 1981-05-26 1982-12-16 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur revision in einem gefahren-, insbesondere brandmeldesystem
US4479113A (en) * 1982-01-20 1984-10-23 The United States Of America As Represented By The United States Department Of Energy Compensated intruder-detection systems
US4506253A (en) * 1983-01-03 1985-03-19 General Signal Corporation Supervisory and control circuit for alarm system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341087A1 (de) * 1973-08-14 1975-02-27 Siemens Ag Automatische brandmeldeanlage
GB1529947A (en) * 1976-07-09 1978-10-25 Munford & White Ltd Ultra-sonic intruder alarms
EP0004911A1 (fr) * 1978-04-19 1979-10-31 Siemens Aktiengesellschaft Avertisseur de danger
EP0058824A2 (fr) * 1981-02-25 1982-09-01 Auergesellschaft Gmbh Dispositif pour maintenir la condition d'alarme d'un appareil-détecteur de gaz
EP0070449A1 (fr) * 1981-07-10 1983-01-26 Siemens Aktiengesellschaft Procédé et dispositif pour l'élévation de la sensibilité de réaction et de la sécurité contre les perturbations dans une installation détectrice de danger et particulièrement d'incendie

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248298A1 (fr) * 1986-06-03 1987-12-09 Cerberus Ag Dispositif détecteur de danger
DE3904979A1 (de) * 1989-02-18 1990-08-23 Beyersdorf Hartwig Verfahren zum betrieb eines ionisationsrauchmelders und ionisationsrauchmelder
DE3904979C2 (fr) * 1989-02-18 1992-01-09 Hartwig Dipl.-Ing. 2400 Luebeck De Beyersdorf
US5189399A (en) * 1989-02-18 1993-02-23 Hartwig Beyersdorf Method of operating an ionization smoke alarm and ionization smoke alarm
EP0405473A2 (fr) * 1989-06-28 1991-01-02 Pittway Corporation Détecteur à bas profil avec source multiface
EP0405473A3 (en) * 1989-06-28 1991-05-02 Pittway Corporation Low profile detector with multi-sided source
WO1995005648A3 (fr) * 1993-08-19 1995-08-10 Sentrol Inc Systeme de detection de fumee presentant des caracteristiques d'autodiagnostic et possedant un capuchon d'admission de fumee remplaçable
WO1995005648A2 (fr) * 1993-08-19 1995-02-23 Sentrol, Inc. Systeme de detection de fumee presentant des caracteristiques d'autodiagnostic et possedant un capuchon d'admission de fumee remplaçable
US6396405B1 (en) 1993-08-19 2002-05-28 General Electric Corporation Automatic verification of smoke detector operation within calibration limits
EP0654771A1 (fr) * 1993-11-23 1995-05-24 Cerberus Ag Procédé pour éviter les fausses alarmes dans un système de détection d'incendie et dispositif pour la réalisation de la méthode
EP0841563A1 (fr) * 1996-11-06 1998-05-13 Zellweger Analytics Limited Dispositif de surveillance pour cellules électrochimiques
WO1998021079A1 (fr) * 1996-11-13 1998-05-22 Siemens Aktiengesellschaft Procede d'adaptation automatique des valeurs de consigne theoriques prescrites pour un dispositif de surveillance de zones a risques et dispositif permettant de mettre ledit procede en oeuvre
EP0903708A1 (fr) * 1997-08-09 1999-03-24 Siemens Building Technologies AG Détecteur d'incendie
WO1999067758A1 (fr) * 1998-06-22 1999-12-29 Martin Daumer Procede et dispositif pour detecter des derives, des sauts et/ou des points aberrants de valeurs de mesure
US6556957B1 (en) 1998-06-22 2003-04-29 Martin Daumer Method and device for detecting drifts, jumps and/or outliers of measurement values
DE10104861A1 (de) * 2001-02-03 2002-11-21 Bosch Gmbh Robert Verfahren zur Branderkennung
DE10104861B4 (de) * 2001-02-03 2013-07-18 Robert Bosch Gmbh Verfahren zur Branderkennung

Also Published As

Publication number Publication date
JPS59168599A (ja) 1984-09-22
US4598271A (en) 1986-07-01
DE3463582D1 (en) 1987-06-11
CA1205884A (fr) 1986-06-10
EP0121048B1 (fr) 1987-05-06

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