EP0049202A1 - Système électronique d'auto-contrôle - Google Patents

Système électronique d'auto-contrôle Download PDF

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Publication number
EP0049202A1
EP0049202A1 EP81401496A EP81401496A EP0049202A1 EP 0049202 A1 EP0049202 A1 EP 0049202A1 EP 81401496 A EP81401496 A EP 81401496A EP 81401496 A EP81401496 A EP 81401496A EP 0049202 A1 EP0049202 A1 EP 0049202A1
Authority
EP
European Patent Office
Prior art keywords
comparator
control
measurement
information
output element
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Withdrawn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
EP81401496A
Other languages
German (de)
English (en)
French (fr)
Inventor
Enzo Di Benedetto
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.)
COMETA SA
Original Assignee
COMETA SA
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 COMETA SA filed Critical COMETA SA
Publication of EP0049202A1 publication Critical patent/EP0049202A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to an electronic self-monitoring system, in particular for safety devices such as, for example, light curtains and anti-collision devices for mobiles.
  • barriers include a beam emitter - either of electromagnetic waves or mechanical waves -., A receiver which delivers information E, electric image of this beam, to a comparator to which a reference is applied, and a relay command which . receives a signal from the comparator at the input, the output of which activates a relay which is most often connected to an alarm device.
  • alarm device it must be understood not only the audible and / or visual alarms, but also the safety devices which control the stopping of the machines.
  • the receiver In operation, as soon as an object intercepts the beam - that is to say either interrupts or reflects it - the receiver then delivers information E to the comparator which emits a signal causing the implementation of the control of relay ; this triggers the relay and therefore the alarm device: thus, for example, a machine tool protected by a light curtain stops immediately or automatically returns to a so-called rest position.
  • the reference is fixed and the information E, image of the state of the beam, is a logical state.
  • the information E image of the state of the beam
  • One of the aims of the present invention is therefore to provide an electronic self-monitoring system which in all cases delivers alarm information, regardless of the type of failure which may affect the auto apparatus. -control.
  • Another object of the invention is to provide a system of this type which is reliable.
  • An object of the invention is a simple and inexpensive electronic self-checking system.
  • the system according to the present invention in particular adapted to safety devices including a magnitude comparator connected to an output element such as a relay itself connected to an alarm device, a system which consists in carrying out alternately a measurement and a control during which a fault is simulated so as to cause the delivery by the comparator of information not exciting this element of output, and consequently the alarm device, only if the alternation of the measurement and control signals disappears.
  • this system comprises between the comparator and the output element an electronic device which alternately passes from zero potential to positive potential as long as the operation of the self-controlled device is correct.
  • a measurement and a control are performed alternately every second time.
  • a comparator different from that delivered during the measurement time is delivered to the comparator.
  • the level of the reference delivered during the control is higher than that of the information received by the comparator.
  • the level of the reference delivered during the control is lower than that of the information received by the comparator.
  • the coupling which may exist between the transmitter and the receiver which is connected to the input of the comparator, is part of this system.
  • the “beam interruption” safety device shown in FIG. 1 comprises a transmitter 1, a receiver 2 coupled to a comparator 3 itself connected, on the input side, to a reference source 4 and, on the output side, to a control of relay 5 connected to a relay 6 which is connected to an alarm device 8.
  • the emitter 1 emits a beam, for example a light beam
  • this is picked up by the receiver 2 which delivers information E, image to the comparator 3 electric of this beam (that is to say linked to the intensity or the amplitude of the beam.
  • the latter compares the amplitude level of this information E with that of the reference R 1 coming from the source 4.
  • the comparator 3 always delivers information to the relay control 5.
  • the comparator 3 if the receiver 2 does not pick up the beam, this means that an object is d in the beam scanning area, no information E is then received by the comparator 3; as a result, the latter does not deliver any information to the relay 5 command, thereby causing the relay 6 to drop out.
  • the comparator 3 will deliver successive alternating information, one corresponding to measurement M and the other to control C.
  • the signal from comparator 3 serves as a relay control through a capacitive link which has the advantage of responding only to a modulation of this signal and not to a constant voltage level over time, which would correspond to an electronics breakdown.
  • FIG. 2 represents a safety device which operates by "beam detection".
  • a safety device which operates by "beam detection”.
  • Such a device comprises a transmitter 1 and a receiver 2 generally located in the same enclosure.
  • the receiver 2 as in the previous diagram, is connected to a comparator 3 which is connected, on the input side, to a reference source 4 and, on the output side, to a relay control 5.
  • a comparator 3 which is connected, on the input side, to a reference source 4 and, on the output side, to a relay control 5.
  • an object 7 intercepts the beam emitted by the transmitter 1, it will reflect it towards the receiver 2 using the reflector 9.
  • a measurement and a control will be carried out alternately.
  • a signal will be detected which will give an informa tion regarding the good electronic state of the system, including transmission.
  • the comparator 3 will receive a reference R i such that it can detect only a possible return of the beam and not the coupling.
  • a comparator R 2 of a level lower than that of the coupling is delivered to the comparator 3.
  • the comparator 3 in the absence of the reflected beam, delivers successive alternating information corresponding one to the measurement M and the other to the control C.
  • the alarm is triggered by the fallout of relay 6 as soon as the measurement information is greater than the reference R 1 , this reflecting the detection of the reflected beam, and / or as soon as the control information is not taken into account: this being due for example either to the absence of emission, or to a fault of the receiver 2.
  • the signal from the comparator 3 serves as a relay control through a capacitive link.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP81401496A 1980-09-26 1981-09-28 Système électronique d'auto-contrôle Withdrawn EP0049202A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020660A FR2492127A1 (fr) 1980-09-26 1980-09-26 Systeme electronique d'auto-controle
FR8020660 1980-09-26

Publications (1)

Publication Number Publication Date
EP0049202A1 true EP0049202A1 (fr) 1982-04-07

Family

ID=9246304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401496A Withdrawn EP0049202A1 (fr) 1980-09-26 1981-09-28 Système électronique d'auto-contrôle

Country Status (2)

Country Link
EP (1) EP0049202A1 (enrdf_load_stackoverflow)
FR (1) FR2492127A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768630A1 (de) * 1995-10-10 1997-04-16 DORNIER GmbH Einrichtung zur Freigeländeüberwachung und für den Objektschutz
CN1318310C (zh) * 2000-03-24 2007-05-30 東罐材料科技株式会社 钛－铁系复合氧化物颜料及其生产方法
US12136333B2 (en) 2022-12-20 2024-11-05 Florida Power & Light Company Emergency preparedness alert notification system for nuclear power plants

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107616A5 (enrdf_load_stackoverflow) * 1970-09-14 1972-05-05 Mohr Rudolf
GB1302235A (enrdf_load_stackoverflow) * 1970-09-17 1973-01-04
FR2215629A1 (enrdf_load_stackoverflow) * 1973-01-29 1974-08-23 Xenex Corp
CH612026A5 (en) * 1977-03-30 1979-06-29 Cerberus Ag Method for monitoring the function of an ultrasonic alarm system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107616A5 (enrdf_load_stackoverflow) * 1970-09-14 1972-05-05 Mohr Rudolf
GB1302235A (enrdf_load_stackoverflow) * 1970-09-17 1973-01-04
FR2215629A1 (enrdf_load_stackoverflow) * 1973-01-29 1974-08-23 Xenex Corp
CH612026A5 (en) * 1977-03-30 1979-06-29 Cerberus Ag Method for monitoring the function of an ultrasonic alarm system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768630A1 (de) * 1995-10-10 1997-04-16 DORNIER GmbH Einrichtung zur Freigeländeüberwachung und für den Objektschutz
US5838231A (en) * 1995-10-10 1998-11-17 Senstar-Stellar Corporation Device for monitoring open terrain and for protecting objects
CN1318310C (zh) * 2000-03-24 2007-05-30 東罐材料科技株式会社 钛－铁系复合氧化物颜料及其生产方法
US12136333B2 (en) 2022-12-20 2024-11-05 Florida Power & Light Company Emergency preparedness alert notification system for nuclear power plants

Also Published As

Publication number Publication date
FR2492127B1 (enrdf_load_stackoverflow) 1984-06-01
FR2492127A1 (fr) 1982-04-16

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

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Effective date: 19820726

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Effective date: 19840404

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Inventor name: DI BENEDETTO, ENZO