EP0026461A2 - Circuit pour systèmes de détection d'intrusion ou d'incendie - Google Patents

Circuit pour systèmes de détection d'intrusion ou d'incendie Download PDF

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Publication number
EP0026461A2
EP0026461A2 EP80105763A EP80105763A EP0026461A2 EP 0026461 A2 EP0026461 A2 EP 0026461A2 EP 80105763 A EP80105763 A EP 80105763A EP 80105763 A EP80105763 A EP 80105763A EP 0026461 A2 EP0026461 A2 EP 0026461A2
Authority
EP
European Patent Office
Prior art keywords
alarm
sabotage
line
detectors
current
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
EP80105763A
Other languages
German (de)
English (en)
Other versions
EP0026461A3 (en
EP0026461B1 (fr
Inventor
Karlheinz Ing. Grad. Schreyer
Luc Den Dooven
Dietrich Dipl.-Ing Bornewasser
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6082205&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0026461(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AT80105763T priority Critical patent/ATE5108T1/de
Publication of EP0026461A2 publication Critical patent/EP0026461A2/fr
Publication of EP0026461A3 publication Critical patent/EP0026461A3/de
Application granted granted Critical
Publication of EP0026461B1 publication Critical patent/EP0026461B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation

Definitions

  • the invention relates to an intrusion, hold-up and / or fire alarm system.
  • Such alarm systems have so-called sabotage detectors in addition to the actual alarm detectors.
  • the sabotage detectors protect the alarm detector against manipulation.
  • the alarm detectors also have an additional contact that can be opened if the detector is opened without authorization, e.g. Removal of the housing cover, a so-called sabotage contact actuated.
  • the alarm detectors should be able to be armed or disarmed independently of the sabotage detectors.
  • alarm detectors and sabotage detectors are connected to the evaluating center via two different lines, generally two-wire lines. This means that the lines can be switched separately, but the number of lines required is twice as high as the number of alarm reporting lines.
  • a fire alarm system is known in which the line in the control center is monitored for alarm, short circuit, interruption and earth fault with a voltage measuring device arranged in a voltage divider circuit. How the evaluation should be carried out in detail is not described in detail.
  • the detectors can be connected in parallel to or in series in the line. In addition to the malfunctions mentioned above, it is only monitored for an alarm, for example in the event of a fire. Monitoring for sabotage is not possible there.
  • the object of the invention is to provide a signaling system of the type mentioned in the introduction in which only one line, generally a two-wire line, is required for both the alarm and the sabotage message. Appropriate training of the detectors and a suitable evaluation facility at the headquarters are necessary for this.
  • This object is achieved in that several alarm and sabotage detectors are connected to the same line, that an evaluation device is provided in a control center, by means of which alarm and sabotage messages can be evaluated independently of one another, with a current measuring device for determining the line resistance in the line is arranged, the output of which is connected to a plurality of comparators, and which receive different current limit values predefined in accordance with the number of comparators as comparison variables, so that a separate alarm and sabotage message can be displayed above the comparators logic logic elements.
  • An advantage of the circuit arrangement according to the invention is that only half of the lines are necessary for the required signaling lines to the control center.
  • the evaluation device located in the control center monitors the current applied to the line by a voltage source.
  • the current flowing in the line and thus the resistance of the line is measured on a current measuring device arranged in the line and is passed to several comparators which are arranged downstream of the current measuring device. These receive predetermined different current limit values which correspond to the resistance limit values of the line at rest.
  • alarm or sabotage messages are displayed by logical combinations of the output signals of the comparators.
  • the alarm message can expediently be switched off without influencing the sabotage message, so that tampering with the detectors or the lines can also be detected when the alarm sensors are disarmed.
  • Another advantage of the arrangement according to the invention is that it can be easily integrated into a microcomputer-controlled control center, with all line current values for the most varied conditions on the line being measured after the system is switched on and stored in a read-write memory. These values then serve as comparison values for the different notification types.
  • the present invention advantageously differs in that only one resistor is arranged in the detectors next to the alarm contact and no rectifier element is provided.
  • the simultaneous monitoring for sabotage with the same line of alarm detectors requires the arrangement of an additional contact and an additional resistor.
  • the figure shows the Ausvrerteeinrichttmg in the control center Z and a line L1 with a detector M1 and a line termination RLA.
  • a voltage source P supplies the line L1 with the voltage U.
  • a plurality of detectors M1, M2 ?? are connected in series, only one of which is shown.
  • Line L1 is terminated with resistor RLA.
  • the current I flowing on the line L1 is determined by the resistors RA, RS of the detectors M, the line termination RLA and the resistance of the line.
  • a current measuring device MI is connected in series in the line, the resistance value of which is chosen so small that it practically does not influence the line current 1.
  • the line current I is a measure of the total resistance of the detection line L1.
  • the value of the measured line current I is passed from the output of the measuring device MI to the first inputs of three comparators K1, K2, K3.
  • the comparators are known comparison elements, for example BE TCA 345A (Siemens), which compare a continuously variable variable with a second variable, the reference variable. As long as the constantly variable variable is larger than the comparison value, the output has a level which corresponds, for example, to logic "0", in the other case to logic "1".
  • the predetermined current limit values are applied to the second inputs of the three comparators, for example a minimally permissible current value Imin at the comparator K1 and the current value I 0 at the comparator K2 equals zero and a maximum permissible current value Imax at comparator K3.
  • the output of the comparator K1 goes to a first input of an AND gate G1, the output of the comparator K 2 goes on the one hand via a negation element G2 to the second input of the AND gate G1 and on the other hand to a first input of an OR gate G3.
  • the output of the comparator K3 leads to the second input of the OR gate G3. If a detector M responds or there is another fault, the output signal of the OR gate G3 shows a sabotage message "S", the output signal of the AND gate G1 an alarm message "A". With the switch SA connected downstream of the AND gate G1, the alarm detectors can be disarmed.
  • the M detectors are connected in series to the L line. Each detector has a KS sabotage contact and a RS resistor in series. Parallel to this "sabotage" resistor RS there is also a series connection of the alarm contact K1 and the "alarm" resistor RA.
  • the resistance values are selected in such a way that the response of several alarm detectors cannot simulate a sabotage message.
  • the first case is indicated via the output of the comparator K2
  • the second and third case is indicated via the comparator K3 and the OR gate G3 connected downstream of the two comparators K2 and K3 as sabotage message "S”.
  • An alarm message is only given if the line current I is less than the lower limit of the line current Imin but is not equal to zero.
  • the alarm message "A" is displayed via the outputs of the comparators K1 and K2 and the logic elements G1 and G2.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
EP80105763A 1979-09-28 1980-09-24 Circuit pour systèmes de détection d'intrusion ou d'incendie Expired EP0026461B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105763T ATE5108T1 (de) 1979-09-28 1980-09-24 Schaltungsanordnung fuer einbruch- oder feuermeldeanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2939494 1979-09-28
DE2939494A DE2939494B2 (de) 1979-09-28 1979-09-28 Schaltungsanordnung für Einbruch- oder Feuermeldea nlagen

Publications (3)

Publication Number Publication Date
EP0026461A2 true EP0026461A2 (fr) 1981-04-08
EP0026461A3 EP0026461A3 (en) 1981-05-13
EP0026461B1 EP0026461B1 (fr) 1983-10-19

Family

ID=6082205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105763A Expired EP0026461B1 (fr) 1979-09-28 1980-09-24 Circuit pour systèmes de détection d'intrusion ou d'incendie

Country Status (3)

Country Link
EP (1) EP0026461B1 (fr)
AT (1) ATE5108T1 (fr)
DE (1) DE2939494B2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072187A1 (fr) * 1981-02-06 1983-02-16 Institute For Industrial Research And Standards Méthode et dispositif pour déterminer le lieu de changement d'état d'une partie d'un circuit électrique
EP0090399A1 (fr) * 1982-03-29 1983-10-05 Siemens Aktiengesellschaft Installation de signalisation à courant continu
EP0098326A1 (fr) * 1982-07-10 1984-01-18 Fritz Fuss Kom.-Ges. Circuit pour la signalisation de risques
GB2155223A (en) * 1984-02-29 1985-09-18 Bl Tech Ltd A circuit
FR2594575A1 (fr) * 1986-02-19 1987-08-21 Applic Electro Tech Avance Dispositif d'autogarde pour lignes de surveillance
EP0419347A1 (fr) * 1989-09-18 1991-03-27 Sté TEXTON Système de protection, notamment pour véhicules automobiles, du type comprenant un appareil tel qu'un dispositif électronique de commande d'un dispositif d'alarme
FR2664408A1 (fr) * 1990-07-04 1992-01-10 Spie Trindel Installation de surveillance et d'alarme.
EP0424994A3 (en) * 1986-06-20 1993-12-15 Badger Meter Inc Automatic meter reading system with malfunction protection
US6952166B2 (en) 2002-01-16 2005-10-04 Leeds Electronic Engineering Limited Burglar alarm system having reduced wiring

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3148278C2 (de) * 1981-12-05 1984-09-20 Friedrich Merk-Telefonbau GmbH, 8000 München Schaltungsanordnung zum Auswerten der Linienspannung bei Meldelinien mit mehreren Schwellen
DE3148277C2 (de) * 1981-12-05 1985-05-30 Friedrich Merk-Telefonbau GmbH, 8000 München Schaltungsanordnung zum Abgleich einer Meldelinie
DE3308455A1 (de) * 1983-03-10 1984-09-13 Hans-Joachim 5810 Witten Becker Alarmanlage zur absicherung eines gebaeudes
DE3624663A1 (de) * 1986-07-22 1988-01-28 Bosch Gmbh Robert Schaltungsanordnung zum ein- und ausschalten unterschiedlicher elektrischer verbraucher
US7999668B2 (en) 2008-11-17 2011-08-16 GM Global Technology Operations LLC Series interlock system with integrated ability to identify breached locations

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503894A (fr) * 1966-10-18 1967-12-01 Alarme Et Telesurveillance A T Perfectionnements aux installations électriques d'alarme et de surveillance
CH468682A (de) * 1967-06-26 1969-02-15 Cerberus Ag Feuermeldeanlage
US4198625A (en) * 1978-05-02 1980-04-15 General Signal Corporation Dual alarm detection on single loop

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072187A1 (fr) * 1981-02-06 1983-02-16 Institute For Industrial Research And Standards Méthode et dispositif pour déterminer le lieu de changement d'état d'une partie d'un circuit électrique
EP0090399A1 (fr) * 1982-03-29 1983-10-05 Siemens Aktiengesellschaft Installation de signalisation à courant continu
EP0098326A1 (fr) * 1982-07-10 1984-01-18 Fritz Fuss Kom.-Ges. Circuit pour la signalisation de risques
GB2155223A (en) * 1984-02-29 1985-09-18 Bl Tech Ltd A circuit
FR2594575A1 (fr) * 1986-02-19 1987-08-21 Applic Electro Tech Avance Dispositif d'autogarde pour lignes de surveillance
EP0424994A3 (en) * 1986-06-20 1993-12-15 Badger Meter Inc Automatic meter reading system with malfunction protection
EP0419347A1 (fr) * 1989-09-18 1991-03-27 Sté TEXTON Système de protection, notamment pour véhicules automobiles, du type comprenant un appareil tel qu'un dispositif électronique de commande d'un dispositif d'alarme
FR2664408A1 (fr) * 1990-07-04 1992-01-10 Spie Trindel Installation de surveillance et d'alarme.
US6952166B2 (en) 2002-01-16 2005-10-04 Leeds Electronic Engineering Limited Burglar alarm system having reduced wiring

Also Published As

Publication number Publication date
ATE5108T1 (de) 1983-11-15
EP0026461A3 (en) 1981-05-13
DE2939494A1 (de) 1981-04-02
EP0026461B1 (fr) 1983-10-19
DE2939494B2 (de) 1981-07-02

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