EP0772850A1 - Fire detector with a non-volatile memory - Google Patents

Fire detector with a non-volatile memory

Info

Publication number
EP0772850A1
EP0772850A1 EP95926437A EP95926437A EP0772850A1 EP 0772850 A1 EP0772850 A1 EP 0772850A1 EP 95926437 A EP95926437 A EP 95926437A EP 95926437 A EP95926437 A EP 95926437A EP 0772850 A1 EP0772850 A1 EP 0772850A1
Authority
EP
European Patent Office
Prior art keywords
fire
fire detector
measurement signal
volatile memory
maintenance
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
EP95926437A
Other languages
German (de)
French (fr)
Other versions
EP0772850B1 (en
Inventor
Jacques Lewiner
Eugeniusz Smycz
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0772850A1 publication Critical patent/EP0772850A1/en
Application granted granted Critical
Publication of EP0772850B1 publication Critical patent/EP0772850B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion

Definitions

  • the present invention relates to fire detectors including non-volatile memory. More particularly, the invention relates to a fire detector comprising:
  • a central unit comprising a non-volatile memory in which a code representative of at least one characteristic element specific to said fire detector is recorded
  • a fire sensor which measures a physical quantity whose variations make it possible to detect the existence of a fire in the vicinity of the fire detector, this fire sensor supplying the central unit with an analog electrical signal, said measurement signal, which has a value representative of the physical quantity measured by the fire sensor, the aforementioned characteristic element including a normal value iO of the measurement signal in the absence of fire.
  • a fire detector is disclosed in the document: Research Disclosure No. 357, January 1994 (Emsworth, GB, "Smoke detector with dirty chamber signal").
  • Fire detectors of the type in question must be maintained at regular time intervals in order to remain reliable.
  • maintenance services usually note the date of the last dismantling of a fire detector for maintenance, without always systematically and reliably checking the effectiveness of this maintenance. Consequently, if the periodic maintenance of a fire detector has been poorly done, it can then give unreliable indications at least until its next dismantling date for maintenance.
  • the present invention aims in particular to overcome these drawbacks.
  • a fire detector of the kind in question is essentially characterized in that the fire detector also comprises interface means allowing access to the content of the memory. retentive without dismantling the fire detector, (that is to say in particular without removing it from its base, or without unscrewing it from the ceiling, or without opening its case), in that the retentive memory also includes dates on which maintenance operations on said fire detector were carried out, and in that the central unit is programmed to compare the measurement signal with the normal value iO of the measurement signal each time it receives means of interface an instruction to record a maintenance date, and to refuse this recording if the measurement signal is not between iO - ⁇ l and iO + ⁇ 2, where ⁇ l and ⁇ 2 are predetermined values.
  • maintenance services can easily access at least the last preventive maintenance date for each fire detector, without having to dismantle the fire detector, which is often difficult to access since it is placed high up. .
  • Maintenance services can therefore easily determine reliably whether a particular fire detector should be subject to preventive maintenance.
  • the new maintenance date is not written to the non-volatile memory of the detector unless this maintenance has made it possible to reduce the measurement signal in the absence of fire to a value close enough to the normal value iO, it is easy to identify fire detectors for which maintenance has been poorly done or is insufficient, and this without waiting for the next preventive maintenance. As a result, the reliability of fire detection is improved.
  • the interface means comprise a connector connected to the central unit, the connector being able to receive a complementary connector connected to an external device in order to make this external device communicate with the central unit;
  • the interface means comprise a communication link between the fire detector and an alarm center: this embodiment is particularly advantageous, insofar as it makes it possible to know, from the alarm center, at least the date of the last maintenance of all the fire detectors connected to this alarm center;
  • the aforementioned characteristic element also includes a date of manufacture of said detector
  • the non-volatile memory also contains, for each maintenance date, the value of the measurement signal transmitted to the central unit by the fire sensor when recording said measurement date;
  • the normal value iO of the measurement signal is a value measured in the absence of fire for the fire sensor in question, during its manufacture or its first commissioning.
  • the single figure represents a fire detector according to an embodiment of the invention, connected to an alarm center and capable of being connected to an external interface box.
  • the fire detector 1 according to the invention comprises a microprocessor 2 including a non-volatile memory 2a, in particular of the EEPROM type. More generally, the fire sensor 1 comprises a central unit which includes a programmable electronic circuit such as a microprocessor and a non-volatile memory which may or may not be included in the microprocessor.
  • the microprocessor 2 has an analog input 2a which is connected to a fire sensor 3, which fire sensor measures a physical quantity, the variations of which make it possible to detect the existence of a fire in the vicinity of the fire detector.
  • the fire sensor 3 can be an ionic smoke sensor, an optical smoke sensor, a thermal sensor, or the like.
  • the fire sensor 3 sends to the analog input 2a of the microprocessor an analog electrical signal i, called the measurement signal, the value of which is representative of the physical quantity measured by the fire sensor.
  • the value of the signal i which is representative of the physical quantity measured can be for example the intensity or the voltage of this signal.
  • the microprocessor 2 compares the measurement signal i to a normal value iO of this measurement signal in the absence of fire, and when the measurement signal i is sufficiently distant from its normal value iO, the microprocessor 2 determines l existence of a fire in the vicinity of the fire detector 1, and it reacts for example by sending a alarm message to an alarm center 4, via a link 5, which preferably also allows messages to be sent from the alarm center 4 to the microprocessor 2.
  • the non-volatile memory 2a of the microprocessor 2 includes not only the normal value iO mentioned above, measured just after the manufacture of the fire detector 1 or after its first commissioning, but also the date of the maintenance operations undergone by the detector, or at least the date of the last maintenance operation. In addition, the non-volatile memory 2a preferably also includes the date of manufacture and the serial number specific to the fire detector 1.
  • alarm center 4 which can be provided, for example, with a screen 4a and a keyboard 4b.
  • the fire detector 1 has a connector 6 connected to the microprocessor 2.
  • the connector 6 During the maintenance operations of the fire detector 1, when the said detector is removed, it is thus possible to connect to the connector 6 an additional connector 7 which is connected to an interface box 8 by means of a cable 9, the interface box 8 comprising for example a screen 8a and a keyboard 8b.
  • Microprocessor 2 is programmed to compare the value of the measurement signal i to said normal value iO when said microprocessor receives from the interface box 8 the order to record the date of maintenance.
  • the microprocessor 2 is programmed to refuse the recording of the maintenance date in the non-volatile memory 2a, and to send the interface box 8 a message indicating this refusal.
  • the microprocessor 2 can control the efficiency of the maintenance operations, and this efficiency is also controllable from the alarm center 4 if the fire detector has been reassembled despite the refusal to record the last maintenance date.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

Fire detector (1) comprising a central processing unit (2) and a sensor (3) that supplies said unit with an analog measurement signal. The processor includes a non-volatile memory (2a) containing at least one normal measuring signal value and maintenance dates, the fire detector also comprising an interface (5, 6) for accessing the contents of the non-volatile memory accessible without having to remove the fire detector. After each maintenance, a new maintenance date is recorded in the non-volatile memory. No recording is made, however, if the measuring signal differs substantially from its normal value.

Description

DETECTEUR D'INCENDIE INCLUANT UNE MEMOIRE REMANENTE FIRE DETECTOR INCLUDING A REMANENT MEMORY
La présente invention est relative aux détecteurs d'incendie incluant une mémoire rémanente. Plus particulièrement, l'invention concerne un détecteur d'incendie comportant :The present invention relates to fire detectors including non-volatile memory. More particularly, the invention relates to a fire detector comprising:
- une unité centrale comportant une mémoire réma¬ nente dans laquelle est enregistré un code représentatif d'au moins un élément caractéristique propre audit détecteur d'incendie,a central unit comprising a non-volatile memory in which a code representative of at least one characteristic element specific to said fire detector is recorded,
- un capteur d'incendie qui mesure une grandeur physique dont les variations permettent de détecteur l'existence d'un incendie au voisinage du détecteur d'incen¬ die, ce capteur d'incendie fournissant à l'unité centrale un signal électrique analogique, dit signal de mesure, qui a une valeur représentative de la grandeur physique mesurée par le capteur d'incendie, l'élément caractéristique susmentionné incluant une valeur normale iO du signal de mesure en l'absence d'incendie. Un tel détecteur d'incendie est divulgué dans le document : Research Disclosure n° 357, Janvier 1994 (Ems- worth, GB, "Smoke detector with dirty chamber signal").a fire sensor which measures a physical quantity whose variations make it possible to detect the existence of a fire in the vicinity of the fire detector, this fire sensor supplying the central unit with an analog electrical signal, said measurement signal, which has a value representative of the physical quantity measured by the fire sensor, the aforementioned characteristic element including a normal value iO of the measurement signal in the absence of fire. Such a fire detector is disclosed in the document: Research Disclosure No. 357, January 1994 (Emsworth, GB, "Smoke detector with dirty chamber signal").
Les détecteurs d'incendie du genre en question doivent être entretenus à intervalles de temps réguliers, de façon à rester fiables.Fire detectors of the type in question must be maintained at regular time intervals in order to remain reliable.
Toutefois, lorsque plusieurs types de détecteurs d'incendie sont installés dans un même bâtiment, ou lorsque ces détecteurs d'incendie ont été installés à des dates différentes, il est possible que ces détecteurs doivent être entretenus à des dates différentes.However, when several types of fire detectors are installed in the same building, or when these fire detectors were installed on different dates, these detectors may need to be serviced on different dates.
La gestion de ces entretiens devient alors complexe, d'autant plus que des détecteurs 'incendie peuvent éven¬ tuellement avoir été intervertis ou remplacés lors de leur dernier démontage pour entretien : dans ce cas, il est extrêmement difficile pour les techniciens de maintenance de repérer exactement les détecteurs d'incendie qui doivent être entretenus à une date donnée, d'autant plus que ces détecteurs sont en général difficilement accessibles.The management of these maintenance then becomes complex, all the more so since fire detectors may possibly have been reversed or replaced during their last dismantling for maintenance: in this case, it is extremely difficult for maintenance technicians to locate exactly the fire detectors that have to be maintained at a given date, especially since these detectors are generally difficult to access.
Par ailleurs, habituellement, les services de maintenance se contentent de noter la date du dernier démontage d'un détecteur d'incendie pour entretien, sans toujours vérifier systématiquement et de façon fiable l'efficacité de cet entretien. Par conséquent, si l'entre¬ tien périodique d'un détecteur d'incendie a été mal fait, il peut ensuite donner des indications non fiables au moins jusqu'à sa prochaine date de démontage pour entretien.In addition, maintenance services usually note the date of the last dismantling of a fire detector for maintenance, without always systematically and reliably checking the effectiveness of this maintenance. Consequently, if the periodic maintenance of a fire detector has been poorly done, it can then give unreliable indications at least until its next dismantling date for maintenance.
La présente invention a notamment pour but de pallier ces inconvénients.The present invention aims in particular to overcome these drawbacks.
A cet effet, selon l'invention, un détecteur d'in¬ cendie du genre en question est essentiellement caractérisé en ce que le détecteur d'incendie comporte en outre des moyens d'interface permettant d'accéder au contenu de la mé¬ moire rémanente sans démonter le détecteur d'incendie, (c'est-à-dire notamment sans l'ôter de son socle, ou sans le dévisser du plafond, ou sans ouvrir son boîtier), en ce que la mémoire rémanente inclut en outre des dates auxquelles ont été effectuées des opérations de maintenance dudit détecteur d'incendie, et en ce que l'unité centrale est programmée pour comparer le signal de mesure à la valeur normale iO du signal de mesure à chaque fois qu'elle reçoit des moyens d'interface une instruction d'enregistrer une date de maintenance, et pour refuser cet enregistrement si le signal de mesure n'est pas compris entre iO - Δl et iO + Δ2, où Δl et Δ2 sont des valeurs prédéterminées.To this end, according to the invention, a fire detector of the kind in question is essentially characterized in that the fire detector also comprises interface means allowing access to the content of the memory. retentive without dismantling the fire detector, (that is to say in particular without removing it from its base, or without unscrewing it from the ceiling, or without opening its case), in that the retentive memory also includes dates on which maintenance operations on said fire detector were carried out, and in that the central unit is programmed to compare the measurement signal with the normal value iO of the measurement signal each time it receives means of interface an instruction to record a maintenance date, and to refuse this recording if the measurement signal is not between iO - Δl and iO + Δ2, where Δl and Δ2 are predetermined values.
Grâce à ces dispositions, les services d'entretien peuvent accéder facilement au moins à la dernière date de maintenance préventive de chaque détecteur d'incendie, et ce sans avoir à démonter le détecteur d'incendie, souvent difficile d'accès puisque placé en hauteur.Thanks to these provisions, maintenance services can easily access at least the last preventive maintenance date for each fire detector, without having to dismantle the fire detector, which is often difficult to access since it is placed high up. .
Les services d'entretien peuvent donc déterminer aisément de façon fiable si un détecteur d'incendie particu¬ lier doit faire l'objet d'une maintenance préventive. De plus, du fait que lors de chaque opération de maintenance préventive, la nouvelle date de maintenance n'est inscrite dans la mémoire rémanente du détecteur que si cette maintenance a permis de ramener le signal de mesure en l'absence d'incendie à une valeur suffisamment proche de la valeur normale iO, il est aisé de repérer les détecteurs d'incendie pour lesquels la maintenance a été mal faite ou s'avère insuffisante, et ce sans attendre la prochaine maintenance préventive. Par conséquent, la fiabilité de la détection d'incendie est améliorée.Maintenance services can therefore easily determine reliably whether a particular fire detector should be subject to preventive maintenance. In addition, the fact that during each preventive maintenance operation, the new maintenance date is not written to the non-volatile memory of the detector unless this maintenance has made it possible to reduce the measurement signal in the absence of fire to a value close enough to the normal value iO, it is easy to identify fire detectors for which maintenance has been poorly done or is insufficient, and this without waiting for the next preventive maintenance. As a result, the reliability of fire detection is improved.
Dans des modes de réalisation préférés de l'inven¬ tion, on a recours en outre à l'une et/ou à l'autre des dispositions suivantes :In preferred embodiments of the invention, recourse is also had to one and / or the other of the following arrangements:
- les moyens d'interface comprennent un connecteur relié à l'unité centrale, le connecteur pouvant recevoir un connecteur complémentaire relié à un appareil extérieur en vue de faire communiquer cet appareil extérieur avec l'unité centrale ;the interface means comprise a connector connected to the central unit, the connector being able to receive a complementary connector connected to an external device in order to make this external device communicate with the central unit;
- les moyens d'interface comprennent une liaison de communication entre le détecteur d'incendie et une centrale d'alarme : ce mode de réalisation est particulièrement avantageux, dans la mesure où il permet de connaître, à partir de la centrale d'alarme, au moins la date de dernière maintenance de tous les détecteurs d'incendie reliés à cette centrale d'alarme ;the interface means comprise a communication link between the fire detector and an alarm center: this embodiment is particularly advantageous, insofar as it makes it possible to know, from the alarm center, at least the date of the last maintenance of all the fire detectors connected to this alarm center;
- l'élément caractéristique susmentionné inclut en outre une date de fabrication dudit détecteur,the aforementioned characteristic element also includes a date of manufacture of said detector,
- l'élément caractéristique susmentionné inclut en outre un numéro d'identification propre audit détecteur, - la mémoire rémanente contient en outre, pour chaque date de maintenance, la valeur du signal de mesure transmis à l'unité centrale par le capteur d'incendie au moment de l'enregistrement de ladite date de mesure ;- the aforementioned characteristic element also includes an identification number specific to said detector, - the non-volatile memory also contains, for each maintenance date, the value of the measurement signal transmitted to the central unit by the fire sensor when recording said measurement date;
- la valeur normale iO du signal de mesure est une valeur mesurée en l'absence d'incendie pour le capteur d'incendie considéré, lors de sa fabrication ou de sa première mise en service.- the normal value iO of the measurement signal is a value measured in the absence of fire for the fire sensor in question, during its manufacture or its first commissioning.
D'autres caractéristiques et avantages de l'inven¬ tion apparaîtront au cours de la description détaillée suivante d'une de ses formes de réalisation, donnée à titre d'exemple non limitatif, en regard du dessin joint.Other characteristics and advantages of the invention will become apparent during the following detailed description of one of its embodiments, given by way of nonlimiting example, with reference to the attached drawing.
Sur le dessin, la figure unique représente un détecteur d'incendie selon un mode de réalisation de l'invention, relié à une centrale d'alarme et susceptible d'être relié à un boîtier d'interface externe. Le détecteur d'incendie 1 selon l'invention comporte un microprocesseur 2 incluant une mémoire rémanente 2a no¬ tamment de type EEPROM. Plus généralement, le capteur d'in¬ cendie 1 comporte une unité centrale qui inclut un circuit électronique programmable tel qu'un microprocesseur et une mémoire rémanente qui peut être ou non incluse dans le microprocesseur.In the drawing, the single figure represents a fire detector according to an embodiment of the invention, connected to an alarm center and capable of being connected to an external interface box. The fire detector 1 according to the invention comprises a microprocessor 2 including a non-volatile memory 2a, in particular of the EEPROM type. More generally, the fire sensor 1 comprises a central unit which includes a programmable electronic circuit such as a microprocessor and a non-volatile memory which may or may not be included in the microprocessor.
Le microprocesseur 2 comporte une entrée analogique 2a qui est reliée à un capteur d'incendie 3, lequel capteur d'incendie mesure une grandeur physique dont les variations permettent de détecter l'existence d'un incendie au voisi¬ nage du détecteur d'incendie 1. Le capteur d'incendie 3 peut être un capteur ionique de fumée, un capteur optique de fumée, un capteur thermique, ou autre.The microprocessor 2 has an analog input 2a which is connected to a fire sensor 3, which fire sensor measures a physical quantity, the variations of which make it possible to detect the existence of a fire in the vicinity of the fire detector. 1. The fire sensor 3 can be an ionic smoke sensor, an optical smoke sensor, a thermal sensor, or the like.
Le capteur d'incendie 3 envoie à l'entrée analogique 2a du microprocesseur un signal électrique analogique i, dit signal de mesure, dont la valeur est représentative de la grandeur physique mesurée par le capteur d'incendie. La valeur du signal i qui est représentative de la grandeur physique mesurée peut être par exemple l'intensité ou la tension de ce signal.The fire sensor 3 sends to the analog input 2a of the microprocessor an analog electrical signal i, called the measurement signal, the value of which is representative of the physical quantity measured by the fire sensor. The value of the signal i which is representative of the physical quantity measured can be for example the intensity or the voltage of this signal.
Le microprocesseur 2 compare le signal de mesure i à une valeur normale iO de ce signal de mesure en l'absence d'incendie, et lorsque le signal de mesure i est suffisam¬ ment éloigné de sa valeur normale iO, le microprocesseur 2 détermine l'existence d'un incendie au voisinage du détec¬ teur d'incendie 1, et il réagit par exemple en envoyant un message d'alarme à une centrale d'alarme 4, par l'intermé¬ diaire d'une liaison 5, qui de préférence permet également d'envoyer des messages depuis la centrale d'alarme 4 vers le microprocesseur 2. La mémoire rémanente 2a du microprocesseur 2 com¬ prend non seulement la valeur normale iO susmentionnée, mesurée juste après la fabrication du détecteur d'incendie 1 ou après sa première mise en service, mais encore la date des opérations de maintenance subies par le détecteur, ou au moins la date de la dernière opération de maintenance. De plus, la mémoire rémanente 2a inclut de préférence également la date de fabrication et le numéro de série propres au détecteur d'incendie 1.The microprocessor 2 compares the measurement signal i to a normal value iO of this measurement signal in the absence of fire, and when the measurement signal i is sufficiently distant from its normal value iO, the microprocessor 2 determines l existence of a fire in the vicinity of the fire detector 1, and it reacts for example by sending a alarm message to an alarm center 4, via a link 5, which preferably also allows messages to be sent from the alarm center 4 to the microprocessor 2. The non-volatile memory 2a of the microprocessor 2 includes not only the normal value iO mentioned above, measured just after the manufacture of the fire detector 1 or after its first commissioning, but also the date of the maintenance operations undergone by the detector, or at least the date of the last maintenance operation. In addition, the non-volatile memory 2a preferably also includes the date of manufacture and the serial number specific to the fire detector 1.
Ces données sont accessibles à un utilisateur depuis la centrale d'alarme 4, qui peut être pourvue pour cela par exemple d'un écran 4a et d'un clavier 4b.These data are accessible to a user from the alarm center 4, which can be provided, for example, with a screen 4a and a keyboard 4b.
Il est ainsi possible de planifier très facilement la maintenance des différents détecteurs d'incendie d'une installation complète, et de vérifier les références d'un détecteur d'incendie particulier dans cette installation, sans pour autant avoir à accéder physiquement à ce détec¬ teur, qui généralement est disposé sous un plafond, donc est difficilement accessible.It is thus possible to easily plan the maintenance of the various fire detectors of a complete installation, and to check the references of a particular fire detector in this installation, without having to physically access this detec¬ tor, which is generally placed under a ceiling, therefore is difficult to access.
De plus, le détecteur d'incendie 1 comporte un connecteur 6 relié au microprocesseur 2.In addition, the fire detector 1 has a connector 6 connected to the microprocessor 2.
Pendant les opérations de maintenance du détecteur d'incendie 1, lorsque ledit détecteur est démonté, il est ainsi possible de brancher sur le connecteur 6 un connecteur complémentaire 7 qui est relié à un boîtier d'interface 8 par l'intermédiaire d'un câble 9, le boîtier d'interface 8 comportant par exemple un écran 8a et un clavier 8b.During the maintenance operations of the fire detector 1, when the said detector is removed, it is thus possible to connect to the connector 6 an additional connector 7 which is connected to an interface box 8 by means of a cable 9, the interface box 8 comprising for example a screen 8a and a keyboard 8b.
Ainsi, à la fin des opérations de maintenance, il est possible de faire enregistrer dans la mémoire rémanente 2a, par l'intermédiaire du boîtier d'interface 8, la date desdites opérations de maintenance.Thus, at the end of the maintenance operations, it is possible to store in the non-volatile memory 2a, via the interface box 8, the date of said maintenance operations.
Le microprocesseur 2 est programmé pour comparer la valeur du signal de mesure i à ladite valeur normale iO au moment où ledit microprocesseur reçoit du boîtier d'inter¬ face 8 l'ordre d'enregistrer la date de maintenance.Microprocessor 2 is programmed to compare the value of the measurement signal i to said normal value iO when said microprocessor receives from the interface box 8 the order to record the date of maintenance.
Si cette valeur i du signal de mesure n'est pas comprise entre des valeurs iO - Δl et iO + Δ2, où Δl et Δ2 sont des valeurs prédéterminées (par exemple, Δl et Δ2 peuvent valoir 5 % de iO), le microprocesseur 2 est pro¬ grammé pour refuser l'enregistrement de la date de mainte¬ nance dans la mémoire rémanente 2a, et pour envoyer au boîtier d'interface 8 un message indiquant ce refus.If this value i of the measurement signal is not between values iO - Δl and iO + Δ2, where Δl and Δ2 are predetermined values (for example, Δl and Δ2 can be 5% of iO), the microprocessor 2 is programmed to refuse the recording of the maintenance date in the non-volatile memory 2a, and to send the interface box 8 a message indicating this refusal.
Ainsi, le microprocesseur 2 peut contrôler l'effica¬ cité des opérations de maintenance, et cette efficacité est également contrôlable depuis la centrale d'alarme 4 si le détecteur d'incendie a été remonté malgré le refus d'enre- gistrement de la dernière date de maintenance.Thus, the microprocessor 2 can control the efficiency of the maintenance operations, and this efficiency is also controllable from the alarm center 4 if the fire detector has been reassembled despite the refusal to record the last maintenance date.
Comme il va de soi, et comme il résulte d'ailleurs déjà de ce qui précède, l'invention ne se limite nullement à ceux de ses modes d'application et de réalisation qui ont été plus spécialement envisagés ; elle en embrasse, au contraire, toutes les variantes. As goes without saying, and as it already follows from the above, the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; on the contrary, it embraces all its variants.

Claims

REVENDICATIONS
1. Détecteur d'incendie (1), comportant :1. Fire detector (1), comprising:
- une unité centrale (2) comportant une mémoire rémanente (2a) dans laquelle est enregistré un code repré¬ sentatif d'au moins un élément caractéristique propre audit détecteur d'incendie,- a central unit (2) comprising a non-volatile memory (2a) in which a code representative of at least one characteristic element specific to said fire detector is recorded,
- un capteur d'incendie (3) qui mesure une grandeur physique dont les variations permettent de détecteur l'existence d'un incendie au voisinage du détecteur d'incen¬ die, ce capteur d'incendie fournissant à l'unité centrale (2) un signal électrique analogique (i), dit signal de mesure, qui a une valeur représentative de la grandeur physique mesurée par le capteur d'incendie, l'élément caractéristique susmentionné incluant une valeur normale iO du signal de mesure en l'absence d'incendie, caractérisé en ce que :- a fire sensor (3) which measures a physical quantity whose variations make it possible to detect the existence of a fire in the vicinity of the fire detector, this fire sensor providing the central unit (2 ) an analog electrical signal (i), called a measurement signal, which has a value representative of the physical quantity measured by the fire sensor, the aforementioned characteristic element including a normal value iO of the measurement signal in the absence of fire, characterized in that:
- le détecteur d'incendie comporte en outre des moyens d'interface (5, 6) permettant d'accéder au contenu de la mémoire rémanente (2a) sans démonter le détecteur d'incendie,- the fire detector further comprises interface means (5, 6) allowing access to the contents of the non-volatile memory (2a) without dismantling the fire detector,
- la mémoire rémanente (2a) inclut en outre des dates auxquelles ont été effectuées des opérations de maintenance dudit détecteur d'incendie, - et l'unité centrale (2) est programmée pour comparer le signal de mesure (i) à la valeur normale iO du signal de mesure à chaque fois qu'elle reçoit des moyens d'interface (5,6) une instruction d'enregistrer une date de maintenance, et pour refuser cet enregistrement si le signal de mesure (i) n'est pas compris entre iO - Δl et iO + Δ2, où Δl et Δ2 sont des valeurs prédéterminées.- the non-volatile memory (2a) also includes dates on which maintenance operations were carried out on said fire detector, - and the central unit (2) is programmed to compare the measurement signal (i) to the normal value iO of the measurement signal each time it receives from the interface means (5,6) an instruction to record a maintenance date, and to refuse this recording if the measurement signal (i) is not understood between iO - Δl and iO + Δ2, where Δl and Δ2 are predetermined values.
2. Détecteur d'incendie selon la revendication 1, dans lequel les moyens d'interface comprennent un connecteur (6) relié à l'unité centrale (2), le connecteur (6) pouvant recevoir un connecteur complémentaire (8) relié à un appareil extérieur (7) en vue de faire communiquer cet appareil extérieur avec l'unité centrale (2) .2. Fire detector according to claim 1, in which the interface means comprise a connector (6) connected to the central unit (2), the connector (6) being able to receive a complementary connector (8) connected to a external device (7) in order to communicate this external device with the central unit (2).
3. Détecteur d'incendie selon la revendication 1, dans lequel les moyens d'interface comprennent une liaison de communication (5) entre le détecteur d'incendie et une centrale d'alarme 3. Fire detector according to claim 1, in which the interface means comprise a communication link (5) between the fire detector and an alarm center
(4). . Détecteur d'incendie selon l'une quelconque des revendications précédentes, dans lequel l'élément caracté¬ ristique susmentionné inclut en outre une date de fabrica¬ tion dudit détecteur. (4). . Fire detector according to any one of the preceding claims, in which the aforementioned characteristic element further includes a date of manufacture of said detector.
5. Détecteur d'incendie selon l'une quelconque des revendications précédentes, dans lequel l'élément caracté¬ ristique susmentionné inclut en outre un numéro d'identifi¬ cation propre audit détecteur.5. Fire detector according to any one of the preceding claims, in which the aforementioned characteristic element further includes an identification number specific to said detector.
6. Détecteur d'incendie selon l'une quelconque des revendications précédentes, dans lequel la mémoire rémanente (2a) contient en outre, pour chaque date de maintenance, la valeur (i) du signal de mesure transmis à l'unité centrale (2) par le capteur d'incendie (3) au moment de l'enregistre¬ ment de ladite date de maintenance. 6. Fire detector according to any one of the preceding claims, in which the non-volatile memory (2a) further contains, for each maintenance date, the value (i) of the measurement signal transmitted to the central unit (2 ) by the fire sensor (3) at the time of recording of said maintenance date.
7. Détecteur d'incendie selon l'une quelconque des revendications précédentes, dans lequel la valeur normale iO du signal de mesure est une valeur mesurée en l'absence d'incendie pour le capteur d'incendie (3) considéré, lors de sa fabrication ou de sa première mise en service. 7. Fire detector according to any one of the preceding claims, in which the normal value iO of the measurement signal is a value measured in the absence of fire for the fire sensor (3) considered, during its manufacturing or its first commissioning.
EP95926437A 1994-07-29 1995-07-27 Fire detector with a non-volatile memory Expired - Lifetime EP0772850B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9409476 1994-07-29
FR9409476A FR2723236B1 (en) 1994-07-29 1994-07-29 FIRE DETECTOR COMPRISING A CENTRAL UNIT WITH INTERFACE FOR MAINTENANCE
PCT/FR1995/001011 WO1996004623A1 (en) 1994-07-29 1995-07-27 Fire detector with a non-volatile memory

Publications (2)

Publication Number Publication Date
EP0772850A1 true EP0772850A1 (en) 1997-05-14
EP0772850B1 EP0772850B1 (en) 1998-05-06

Family

ID=9465924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95926437A Expired - Lifetime EP0772850B1 (en) 1994-07-29 1995-07-27 Fire detector with a non-volatile memory

Country Status (7)

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US (1) US5815075A (en)
EP (1) EP0772850B1 (en)
JP (1) JPH11509339A (en)
DE (1) DE69502400T2 (en)
ES (1) ES2118611T3 (en)
FR (1) FR2723236B1 (en)
WO (1) WO1996004623A1 (en)

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Also Published As

Publication number Publication date
FR2723236A1 (en) 1996-02-02
FR2723236B1 (en) 1996-10-04
JPH11509339A (en) 1999-08-17
DE69502400T2 (en) 1998-08-27
US5815075A (en) 1998-09-29
WO1996004623A1 (en) 1996-02-15
ES2118611T3 (en) 1998-09-16
EP0772850B1 (en) 1998-05-06
DE69502400D1 (en) 1998-06-10

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