EP0282544A1 - Systeme optique portatif d'alarme pour la protection de locaux - Google Patents

Systeme optique portatif d'alarme pour la protection de locaux

Info

Publication number
EP0282544A1
EP0282544A1 EP87906095A EP87906095A EP0282544A1 EP 0282544 A1 EP0282544 A1 EP 0282544A1 EP 87906095 A EP87906095 A EP 87906095A EP 87906095 A EP87906095 A EP 87906095A EP 0282544 A1 EP0282544 A1 EP 0282544A1
Authority
EP
European Patent Office
Prior art keywords
transmitter
output
receiver
circuit
alarm system
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Withdrawn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
EP87906095A
Other languages
German (de)
English (en)
Inventor
Péter HAKKEL
László KÜRTI
Gyula Toth
Gyo "Zo " Vasziljevics
Endre Szabo
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.)
Komplex Kuelkereskedelmi Vallalat
Magyar Optikai Muvek
Magyar Optikai Muevek
Original Assignee
Komplex Kuelkereskedelmi Vallalat
Magyar Optikai Muvek
Magyar Optikai Muevek
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 Komplex Kuelkereskedelmi Vallalat, Magyar Optikai Muvek, Magyar Optikai Muevek filed Critical Komplex Kuelkereskedelmi Vallalat
Publication of EP0282544A1 publication Critical patent/EP0282544A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Definitions

  • the invention relates to a portab-le optical alarm system for area protection containing at least one transmitter emitting a light beam and a receiver sensing the emitted light, as well as a driving stage connected to the output of one of the receiver.
  • the alarm system for area protection can be preferably used everywhere, where a protecting-alarming system is to be established for the sake of property protection or for safety technical reasons in a very short time, with a periodical character or under frequently changing circumstances and unobserved.
  • optical alarm systems for area protection In practice a plurality of optical alarm systems for area protection have been known and used, the common characteristic of which lies in that in the majority of the cases infrared light is used in the established light barriers. Said light barriers radiate modulated or unmodulated light in a continuous mode of operation, accordingly, transmitters and receivers of the light barriers require power of such a magnitude, which cannot be supplied economically either from a battery. For this reason the required number of transmitters and receivers of the light barriers are arranged in a stationary way, simultaneously power is provided for, representing - as widely known - the weak point of the protection systems. Due to the aforemention features known optical alarm systems for area protection are not at all suitable for a changeable settlement or as portable embodiments, not in the least degree for battery operation, although there is an ever increasing demand in this respect.
  • the aim of the invention is to develop a portable optical alarm system for area protection, by the aid of which partly the. deficiencies of known protection systems can be eliminated, partly it becomes possible to protect an a rea of optional magnitude, shape and extension fully automatized without any observance of the system; a further requiremenet lies in that neither settlement nor disassembly, translocation should require special expertness, expenditure on material and livelabour, energy supply should not require the laying of cables.
  • a further aim of the invention lies in that the system should give an alarm signal in case of voltage dropout or in case of any intervention of sabotage character; it is also required that the driving stage having been connected to the last receiver of the system should be able to actuate any optional intervening organ and to perform remote actuation.
  • the invention is based on the recognition in so far as energy consumption of the known optical alarm systems for area protection is not exclusively determined by the electronic components applied in the transmitting and receiving circuits, respectively, but the complexity of circuits is playing a significant role in consumption; further factors influencing consumption are the number of independent circuits for performing the most, diverse functions, energy distribution of the radiated light output as- well as energy requirement of the actuation of the intervening organ connected to the system. Accordingly, the task lies in to develop a transmitting circuit and a receiving circuit, which are able to perform the functions needed with a low number of elements, by using circuit arrangements with a combined function and so, that dissipated loss output could be kept permanently on the possibly lowest value; a further requirement lies in that the emitted light pulses resp. output pulses should not appear in form of sudden and considerable capacities in the supply of the circuits.
  • the task set was solved by the aid of an optical alarm system for area protection which contains at least one transmitter emitting a light beam and a receiver sensing the emitted light, furtheron it is provided with a driving stage connected to the output of one of the receivers.
  • Said arrangement is developed in so f a r as ea ch t ransmi t t e r a nd rec eive r a re a rranged in a casing containing the pulse-mode transmitter or receiver circuit with a battery and the output of each receiver is connected to the input of the following transmitter staying therewith in an electrical connection, while one transmitter of the system is provided with a setting element activating an input of the transmitter, while the output of the receiver forming the last member of the system is connected to the input of the driving stage.
  • the transmitting circuit of the transmitter contains an astable multivibrator, a timer, a logic circuit, an output switching circuit, infrared radiation source, energy storing device and constant-current source, wherein an enabling input of the transmitter circuit is connected to one of the inputs of a NAND gate of the logic circuit while an integrator of the timer is connected to the other input of the NAND gate and the output of the latter one is connected to a driving input of the astable multivibrator, the output of which is connected via a transistor output switching circuit to one of the terminals of a light-snitting diode inserted as the infrared radiation source, while the other terminal thereof if connected to the condenser as the energy storing device and charged by means of a constant- current source.
  • the receiver circuit of the receiver contains a light sensor, a wide-band, high-gain amplifier connected thereto, an impulse drop-out detector formed as an integrator and connected to the output of the amplifier, and output RS flip-flop and a transistor driving stage connected thereto.
  • the transmitter circuit and the receiver circuit are connected to the belonging battery through a voltage stabilizer and it is also considered as advantageous, if the transmitter circuit and the receiver circuit are connected through the voltage stabilizer to solar elements connected parallel with the battery.
  • the main advantage of the optical alarm system for area protection according to the invention lies in that due to the battery or accumulator powering it can be arranged absolutely freely, in any optional distribution and without the necessity of any observance. Due to the design of the transmitters and receivers of the system a fully closed loop can be formed, and owing to the simple layout of the transmitter circuits and the receiver circuits, respectively, said circuits can be reduced to an extremly small size, thus their establishment can be facilitated. Due to the design of the receiver circuit and the transmitter circuit the standby power dissipation of the circuits is of neglible extent, at the same time operating power dissipation does not burden in an impulse-like manner the energy source delivering expediently the stabilize supply voltage. The central wiring between the single transmitters and receivers becomes also superfluous, as the stations are mutually starting one another and forward the change occuring in any point of the system.
  • Figure 1 is a block diagram of the receiver circuit of a possible embodiment of the portable optical alarm system for area protection according to the invention
  • FIG. 2 illustrated the block diagram of the transmitter circuit belonging to the receiver circuit according to Fig, 1
  • Figure 3 gives a more detailed diagram of the receiver circuit according to Fig, 1
  • Figure 4 is a more detai ⁇ ed diagram of the transmitter circuit according to Fig. 2, and Figure 5 shows a possible settlement of the alarm system.
  • Figure 1 illustrates a block diagram of a receiver of the portable optical alarm system according to the invention serving as an example.
  • the output of a light sensor 1 is connected to an input of an amplifier 2, the output of which is connected to an impulse-drop-out detector 3.
  • the impulse drop-out detector 3 is led to an output register 4, which again is connected to an input of a driver stage 5, Battery 5 supplying powering the receiver - as illustrated here- is connected through a voltage stabilizer 7 to the corresponding points of the light sensor 1, the amplifier 2, the impulse dropout detector 3, the output register 4 and the driver stage 5.
  • An enabling ou.tput 5b of the driver stage 5 is connected to an enabling input 8a of a logic circuit 8 of a transmitter, as illustrated in the block diagram in Fig. 2.
  • the output of the logic circuit 8 is connected to the driving input of an astable multivibrator 9 and an output 9a thereof is connected to a further enabling input 8b of the logic circuit 8 through a timer 10, while an other output 9b is connected to the input of an output switching circuit 11.
  • the output switching circuit 11 is connected to one of the terminals of a radiation source 12 /infrared light emitting diode/ while its other terminal is connected to the energy storing device 14 which again is connected to a constant- current source 13.
  • a battery 15 powering the transmitter is connected via voltage stabilizer 16 - having the same layout as the voltage stabilizer 7 - to the complying voltage supply points of the logic circuit 8, the astable multivibrator 9, the timer 10, the output switching circuit 11 and the constant-current source 13.
  • Time constant of the resistor R2 and the condenser C1 is chosen so, that in case of regularly arriving light impulses the condenser C1 cannot be charged te a voltage level which could trigger the R-S flip-flop of the output register 4 built-up of NAND gates. If for any reason an adequate light impulse does not arrive at the photodiode D1, the amplifier 2 is not able to provide a voltage to transistor's T1 base causing it to conduct. As a consequence, increasing voltage on the condenser C1 triggers the output register 4. This latter one opens partly - as a local indicator- a light emitting diode LD1, partly it opens a transistor T2 of the driver stage 5.
  • any optional intervening organ e.g. operating coil of a reed relay - can be inserted, however, the same point represents the enabling output 5b of the receiver, which is connected to the enabling input 8a of the transmitter connected electrically thereto.
  • the enabling input 8a of the transmitter circuit is connected to one of the inputs of a NAND gate of the logic circuit 8.
  • the output of the NAND gate is led to the driving input of the astable multivibrator 9 built-up also with NAND gates, whereas the output 9a thereof is connected to the base of a transistor T5 of the timer 10,
  • the transistor T5 serving as an integrator controls the switching transistor T6, the output of which is, led back to the enabling input 8b of the logic circuit 8. If on the enabling inputs 8a, 8b of the logic circuit. 8 appears an adequate - in case of the present example a low - logic level, the NAND gate of the logic circuit 8 starts the astable multivibrator 9.
  • the constant-current source 13 may contain a resistor of prqparly high value or even a plurality of resistors of different values, which can be optionally chosen, these are providing for the charge of the condenser C3 with a constant current at the same time they prevent that the light- emitting diode LD2 connected to the condenser C3 by the output switching circuit 11 should act as a load for the battery 15.
  • the transmitter should emit impulses which can be evaluated even in a distance of 5-15 m, without separate optics, with an average current consumption of 1-2 mA.
  • Voltage stabilizers 7 and 15 of the transmitter and receiver have an identical construction, in such a manner, it can be guaranteed that in case if the battery 6 resp, 15 dropped below a predetermined voltage level, the transmitter will be unable to emit light-impulses, which will be evaluated as an interrupt signal by the receiver staying in an optical connection therewith and as a consequence, an intervening signal will be released on its output.
  • Fig, 5 shows a possible settlement of the alarm system comprising four transmitters and four receivers.
  • the transmitter and receiver do not build a closed loop, i.e. the enabling input of the first transmitter is not connected to the enabling output of the fourth receiver but is activated by the setting element 17,
  • the power output of the fourth receiver is coupled to a driving stage operating a lamp for alarm signal.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Optical Communication System (AREA)

Abstract

Un système optique portatif d'alarme pour la protection de locaux comprend au moins un émetteur de lumière et un récepteur qui détecte la lumière émise. Les émetteurs et récepteurs du système sont reliés en chaîne, de sorte que le récepteur qui détecte les impulsions lumineuses du premier émetteur est toujours connecté électriquement à l'émetteur suivant, et le dernier récepteur du système est connecté électriquement en partie à l'organe intermédiaire et en partie au premier émetteur du système, ou le premier émetteur du système forme une unité indépendante. Les émetteurs et récepteurs peuvent être mutuellement agencés au choix dans un boîtier contenant le circuit émetteur et la pile correspondante, ou le circuit récepteur et la pile correspondante.
EP87906095A 1986-09-15 1987-09-15 Systeme optique portatif d'alarme pour la protection de locaux Withdrawn EP0282544A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU863935A HU195589B (en) 1986-09-15 1986-09-15 Portable optical system for protecting field
HU393586 1986-09-15

Publications (1)

Publication Number Publication Date
EP0282544A1 true EP0282544A1 (fr) 1988-09-21

Family

ID=10966134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87906095A Withdrawn EP0282544A1 (fr) 1986-09-15 1987-09-15 Systeme optique portatif d'alarme pour la protection de locaux

Country Status (7)

Country Link
US (1) US4949075A (fr)
EP (1) EP0282544A1 (fr)
JP (1) JPH01501260A (fr)
AU (1) AU7961987A (fr)
DK (1) DK260088D0 (fr)
HU (1) HU195589B (fr)
WO (1) WO1988002159A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1239488B (it) * 1990-03-27 1993-11-03 Guala Spa Dispositivo per il collegamento reversibile di uno spruzzatore a pompa azionata da grilletto sul collo di un contenitore impugnabile con una mano
DE69128261T2 (de) * 1990-07-11 1998-04-09 Optex Co Ltd Infrarot-Eindringalarmanlage
EP0514592A1 (fr) * 1991-05-22 1992-11-25 REER S.p.A. Détecteur d'impulsions de signaux lumineux en particulier pour des barrières de sécurité et des commandes à distance par signaux infrarouges
DE4334197C2 (de) * 1993-10-07 1997-01-23 Telefunken Microelectron Verfahren zum Überwachen der Öffnungen eines geschlossenen Raumes
US6317043B1 (en) * 1998-09-01 2001-11-13 Beamerline, L.L.C. Perimeter monitoring system
US6806811B1 (en) * 2002-03-27 2004-10-19 Blaine C. Readler Infra-red perimeter alarm
WO2005054805A2 (fr) * 2003-12-01 2005-06-16 Raymond And Lae Engineering, Inc. Cable de detection de fluide
KR100805563B1 (ko) * 2007-01-08 2008-10-27 송문석 건설 현장용 음성 경보 및 제어 장치
KR102300405B1 (ko) * 2015-04-30 2021-09-09 삼성디스플레이 주식회사 표시 장치

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2007840C3 (de) * 1970-02-20 1979-11-15 Endl, Alfons, 8000 Muenchen Lichtschrankengitter
GB1471357A (en) * 1973-08-08 1977-04-27 Omron Tateisi Electronics Co Photoelectric detector
US4186388A (en) * 1977-11-18 1980-01-29 Robinson Donald W Proximity detector
DE7815175U1 (de) * 1978-05-19 1978-10-12 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Lichtschrankenempfaenger
AU533232B2 (en) * 1979-06-27 1983-11-10 Hochiki Kabushiki Kaisha Photoelectric detector
US4314239A (en) * 1979-12-13 1982-02-02 Giovanni Odone Portable electronic alarm device
DE3230556A1 (de) * 1982-08-17 1984-03-15 Wilfried 2725 Hemslingen Krüger Lichtschrankenobjektaussensicherungsvorrichtung
DE3447350C1 (de) * 1984-12-24 1985-12-05 Hermann Dipl.-Ing. 8000 München Zierhut Transportabler Bewegungsmelder zur Raumüberwachung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8802159A1 *

Also Published As

Publication number Publication date
DK260088A (da) 1988-05-11
HU195589B (en) 1988-05-30
DK260088D0 (da) 1988-05-11
AU7961987A (en) 1988-04-07
WO1988002159A1 (fr) 1988-03-24
JPH01501260A (ja) 1989-04-27
US4949075A (en) 1990-08-14

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