EP0098760A2 - Überwachungsdurchführungsverfahren und Überwachungsanlage zum Schützen einer Gegend - Google Patents

Überwachungsdurchführungsverfahren und Überwachungsanlage zum Schützen einer Gegend Download PDF

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Publication number
EP0098760A2
EP0098760A2 EP83401173A EP83401173A EP0098760A2 EP 0098760 A2 EP0098760 A2 EP 0098760A2 EP 83401173 A EP83401173 A EP 83401173A EP 83401173 A EP83401173 A EP 83401173A EP 0098760 A2 EP0098760 A2 EP 0098760A2
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EP
European Patent Office
Prior art keywords
dipole
state
original state
memory
site
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Withdrawn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
EP83401173A
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English (en)
French (fr)
Other versions
EP0098760A3 (de
Inventor
Roger Amar
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0098760A2 publication Critical patent/EP0098760A2/de
Publication of EP0098760A3 publication Critical patent/EP0098760A3/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/006—Alarm systems in which substations are interrogated in succession by a central station with substations connected to an individual line, e.g. star configuration
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions

Definitions

  • the invention relates to a method for monitoring a site, for example a building, and more particularly relates to a method of taking into account the data to be monitored, which is both faster and more reliable over time than the other methods. known calibration standards.
  • the invention also relates to a monitoring installation implementing this method.
  • a conventional surveillance installation whose function is to signal the presence of intruders in a given site (building, individual house, factory, etc.) consists of a central information management unit to which are connected on the one hand signaling means (for example one or, preferably, several sirens) and, on the other hand, a plurality of sensors whose function is to detect the presence of the intruder by emitting a usable output signal, in particular an abrupt change in electrical state, which is interpreted by the central unit as an alarm triggering order.
  • signaling means for example one or, preferably, several sirens
  • the physiognomy of the sensor network depends above all on the site to be monitored. It may be necessary to combine sensors with volume monitoring (radars) and electromechanical sensors placed in judiciously chosen locations, in general doors and windows.
  • radars volume monitoring
  • electromechanical sensors there are devices with normally open contact and devices with normally closed contact. We can still distinguish among these devices for shock detection and devices maintained in a given state thanks to the proximity of a magnet, the opening of the door or window causing, for example, the removal of the magnet and therefore the change of state of the sensor.
  • the central unit generally has a plurality of inputs intended to be connected to one or more of the sensors mentioned above.
  • the invention aims at a new type of taking into account the initial data, allowing in particular the elimination of the Wheatstone bridges mentioned above.
  • the invention therefore relates to a method of monitoring a site to be protected such as, for example, a building, in which are arranged at least one sensor and, preferably, several sensors connected together so to constitute at least one network forming an electrical dipole connected by its two terminals to a central monitoring unit, characterized in that it consists in measuring the original state of said dipole seen from its two terminals, in memorizing said state of origin and to subsequently compare the current state of said dipole with said stored original state and to trigger a signaling procedure if the difference between these two states exceeds a predetermined value.
  • the invention also covers any installation for monitoring a site to be protected, such as for example a building, of the type comprising a central monitoring unit to which are connected at least one dipole formed by a sensor or a network of sensors connected between them and at least one signaling or alarm means capable of being actuated in response to a significant change in the state of said dipole, characterized in that said central unit comprises means for measuring the state of said dipole, a memory capable of memorizing a particular state or original state of said dipole and a comparator means arranged between said memory and said measuring means for determining the difference between the state of said dipole at a given instant and said original state, control means being arranged between said comparator means and said signaling means to trigger the latter when said deviation exceeds a predetermined value.
  • the monitoring installation consists of a central monitoring unit 11, at least one dipole 12 and at least one alarm means 13 consisting of a siren.
  • the central unit 11 comprises an analog-digital converter 14, provided with a number of multiplexable inputs a 1 , a 2 , a 3 , a 4 , a 59 a 6 and b 1 , b 2 .
  • each input a 1 - a 6 will receive signals from the sensors, while the other two (b 1 , b 2 ) will each be connected to a measurement circuit 15 of the state of a siren such as siren 13, if the installation is designed to receive two.
  • the analog-digital converter could, of course, be made up of as many independent conversion sections as there are inputs.
  • Each input a 1 - a 6 is connected to a pair of access terminals A, B of the housing of the central unit via a network of resistors R 1 , R 2 and R 3 .
  • a dipole 12 is shown connected to one of these pairs of terminals.
  • the resistor R 1 on the one hand (which is connected to a voltage source V 0 ) and the series mounting of the dipole 12 with the resistor R 3 on the other hand, constitute a voltage divider connected to an input (a 1 ) of the converter via the resistor R 2 .
  • Any variation in resistance in dipole 12 is therefore necessarily transmitted in the form of a voltage variation at input a 1 .
  • the dipole 12 is constituted by a series connection of several electromechanical sensors 17 with normally closed contact 18 and with series resistance.
  • the resistance and the normally closed contact are, for example, housed in a same housing constituting a sensor.
  • other electromechanical sensors with normally open contact or with normally closed contact could be used, forming other types of dipoles.
  • FIG. 2a shows, for example, a dipole called "end-of-line resistor" because it includes a resistor R, placed at the end of the line, a number of normally closed contacts 20 placed in series between the terminals of the dipole and a number of normally open contacts 21 placed in parallel between these same terminals.
  • R L resistor
  • the dipole impedance is equal to the value of the resistance R L.
  • the dipole impedance tends to infinity and when one of the normally open contacts closes, it tends to zero.
  • the last two states must be taken into account by the central unit as alarm triggering orders.
  • the converter 14 is coupled to a microprocessor 25 associated with a memory M.
  • the latter has sufficient capacity to store at least as many words as there are sections or d multiplexed inputs in said converter, each word being representative of a voltage value.
  • the microprocessor is programmed to manage the memory and, in particular, to control the recording of digital information representative of the voltages applied to the inputs a and b of the converter during an initialization phase and to compare them subsequently and cyclically with the instantaneous voltage values applied to these same inputs, respectively, throughout the duration of commissioning of the installation.
  • a deviation resulting from a given comparison at a given time triggers an alarm, that is to say that the microprocessor 25 sends a control signal to a shift register 26 which controls the various sirens 13.
  • a siren 13 has its own audio frequency oscillator, so that it is put into service by simple application of a voltage V 2 at its terminals. This voltage is applied by the working contact of a relay 28 controlled by a transistor T 1 , the base of which is connected to an output (q 2 in FIG. 1) of the register 26.
  • the measurement circuit 15 of the state of the siren 13 consists of a resistor R 4 on the one hand (supplied by a voltage source V 1 ) and siren 13, itself in series with a diode D 1 , on the other hand.
  • the common point of the resistor R 4 and of the diode D 1 is connected to the input b 1 by the connection 30. It is understood that this arrangement also plays the role of a "voltage divider" with respect to input b 1 , whose state changes depending on the operating conditions and connection of the siren 13. Indeed, if the alarm is not triggered and the connection wiring to the siren is not deteriorated, input b 1 receives a low voltage, less than 0.7 volts.
  • the input b 1 receives substantially the voltage V 1 .
  • the processor is of course programmed to trigger the alarm thanks to another siren not shown and to signal the fault. Furthermore, if the alarm is triggered and the siren is short-circuited, input b 1 receives an abnormally low voltage, less than 0.7 volts.
  • the microprocessor is programmed to, in such a case, cut the power supply to relay 28 (blocking of transistor T 1 by the shift register) and signal the fault, while triggering an alarm thanks to the other sirens. This additional security absolutely preserves the electrical supply means, in particular the batteries, from any thermal runaway. It can therefore be seen that each siren is associated with a circuit for measuring its own connection state, that the output of this measurement circuit is connected to an input of the converter 14 and that part of the memory M is reserved for storage. digital information representative of an original state of this measurement circuit.
  • the installation is commissioned as follows.
  • a procedure for taking into account and memorizing all the input parameters is initiated, that is to say a storage in the memory M of all the voltages applied to the inputs a and b.
  • This procedure is, of course, entirely managed by the microprocessor. If one of the connecting wires of a siren is cut, the appearance of a voltage V 1 at an input b is immediately interpreted as a fault by the microprocessor, which fault is signaled.
  • a fictitious alarm makes it possible to check immediately after no siren is short-circuited. From this moment, the installation is operational and the microprocessor begins to compare cyclically all the voltages (digitally converted) applied to inputs a and b, to the corresponding values recorded in memory M. A deviation greater than a predetermined value triggers an alarm .
  • the invention is not limited to the embodiments which have just been described. Many variations of circuits are possible. In particular, the siren control circuit may be significantly different. You can, for example, replace the relay with a power transistor control circuit. This means that the invention covers all the technical equivalents of the means involved if they are within the scope of the claims which follow.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
EP83401173A 1982-06-09 1983-06-09 Überwachungsdurchführungsverfahren und Überwachungsanlage zum Schützen einer Gegend Withdrawn EP0098760A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8210001A FR2528601A1 (fr) 1982-06-09 1982-06-09 Procede de mise en surveillance d'un site a proteger et installation de surveillance mettant en oeuvre ce procede
FR8210001 1982-06-09

Publications (2)

Publication Number Publication Date
EP0098760A2 true EP0098760A2 (de) 1984-01-18
EP0098760A3 EP0098760A3 (de) 1987-05-27

Family

ID=9274786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401173A Withdrawn EP0098760A3 (de) 1982-06-09 1983-06-09 Überwachungsdurchführungsverfahren und Überwachungsanlage zum Schützen einer Gegend

Country Status (2)

Country Link
EP (1) EP0098760A3 (de)
FR (1) FR2528601A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE103427T1 (de) * 1990-01-17 1994-04-15 Siemens Ag Schutzeinrichtung fuer elektrische maschinen.
DE4100827C2 (de) * 1991-01-14 1999-02-11 Diehl Stiftung & Co Überwachungs-Einrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740466A (en) * 1970-12-14 1973-06-19 Jackson & Church Electronics C Surveillance system
US4027289A (en) * 1975-06-26 1977-05-31 Toman Donald J Operating condition data system
DE2716506A1 (de) * 1977-04-14 1978-10-19 Dieter Eberhard Vorrichtung zur bestimmung des alarmausloeseortes in alarmanlagen
EP0004911A1 (de) * 1978-04-19 1979-10-31 Siemens Aktiengesellschaft Gefahrenmeldeanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740466A (en) * 1970-12-14 1973-06-19 Jackson & Church Electronics C Surveillance system
US4027289A (en) * 1975-06-26 1977-05-31 Toman Donald J Operating condition data system
DE2716506A1 (de) * 1977-04-14 1978-10-19 Dieter Eberhard Vorrichtung zur bestimmung des alarmausloeseortes in alarmanlagen
EP0004911A1 (de) * 1978-04-19 1979-10-31 Siemens Aktiengesellschaft Gefahrenmeldeanlage

Also Published As

Publication number Publication date
EP0098760A3 (de) 1987-05-27
FR2528601A1 (fr) 1983-12-16
FR2528601B3 (de) 1985-03-08

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