EP0772855A1 - Brandmelder mit korrektur von störparametern - Google Patents

Brandmelder mit korrektur von störparametern

Info

Publication number
EP0772855A1
EP0772855A1 EP95926986A EP95926986A EP0772855A1 EP 0772855 A1 EP0772855 A1 EP 0772855A1 EP 95926986 A EP95926986 A EP 95926986A EP 95926986 A EP95926986 A EP 95926986A EP 0772855 A1 EP0772855 A1 EP 0772855A1
Authority
EP
European Patent Office
Prior art keywords
correction
fire
physical quantity
signal
value
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
EP95926986A
Other languages
English (en)
French (fr)
Other versions
EP0772855B1 (de
Inventor
Jacques Lewiner
Eugeniusz Smycz
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.)
ORWIN
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0772855A1 publication Critical patent/EP0772855A1/de
Application granted granted Critical
Publication of EP0772855B1 publication Critical patent/EP0772855B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system

Definitions

  • the present invention relates to fire detection devices, and more specifically to such devices which include a fire sensor to measure a first physical quantity, a variation of which is significant in the existence of a fire in the vicinity of the device. detection, this fire sensor generating an analog electrical signal, called a measurement signal, which has a value representative of the first physical quantity, this measurement signal being influenced by at least one second physical quantity different from the first quantity physical, the device further comprising at least one correction sensor for measuring said second physical quantity and generating an electrical signal analogi ⁇ that, said correction signal, which has a value representative of the second physical quantity, in order to correct the influence of this second physical quantity on the measurement signal.
  • the correction sensor used for this was a thermistor which was associated with the aforementioned amplifier, the characteristics of this thermistor being chosen so as to compensate as best as possible for the variations in gain of the amplifier as a function of the temperature. ⁇ ture.
  • document EP-A-0 418 409 describes a fire detection device comprising both a fire sensor and at least one correction sensor which are both connected to the same programmable central unit. to transmit the measurement and correction signals to it respectively.
  • the central unit is programmed to digitally compensate the measurement signal as a function of the correction signal, thereby calculating a corrected value of the measurement signal.
  • this correction is complex, since on the one hand the corrected value is generally a non-linear function of both the measurement signal and the correction signal, and on the other hand the measurement signal varies within a fairly wide range of values. big.
  • this correction implies an overload of the operation of the central unit, since each time the measurement signal is acquired, it is also necessary to acquire the correction signal and calculate the corrected value. This overload is all the more sensitive as the calculation of the corrected value is complex.
  • the present invention aims in particular to remedy the aforementioned drawbacks.
  • a fire detection device of the kind in question is essentially characterized in that the central unit has in memory correction means giving, as a function of the value of the correction signal, a so-called normal value iO of the measurement signal in the absence of fire, and the central unit being programmed for:
  • the calculation of the iO value is simpler than the calculation of a corrected value of the measurement signal (on the one hand, the calculation of the iO value only depends on the correction signal and not on the measurement signal, and d On the other hand, the value iO undergoes much smaller variations than the measurement signal, so that the adjustment of the value iO can be much finer than a correction of the measurement signal), - and the calculation of the iO value can optionally
  • the correction means in memory of the central unit consist of a correspondence table
  • the correction means in memory of the central unit are constituted by an algorithm
  • the second physical quantity is the ambient temperature
  • the fire sensor is an ion sensor, and the second physical quantity is the ambient humidity;
  • the fire sensor is an ion sensor, and the second physical quantity is the ambient pressure;
  • the second physical quantity is the ambient pressure;
  • the measurement signal is influenced by several second physical quantities
  • the device comprising several correction sensors each connected to the central unit to each transmit a correction signal having a value representative of one of the second physical quantities correction means in memory in the central unit giving the normal value iO of the measurement signal as a function of the values of the correction signals, and the central unit being programmed to determine the normal value of the measurement signal as a function of the values of the signals correction from said correction means.
  • FIG. 1 is a schematic view of an alarm system including a fire detection device according to the invention.
  • FIG. 2 represents an example of a curve of the normal value of the measurement signal generated by the fire sensor as a function of the correction signal generated by the correction sensor of the device of FIG. 1.
  • the fire detector 1 according to the invention comprises a programmable central unit constituted by a microprocessor 2 which comprises at least two analog inputs 2a, 2b.
  • the first analog input 2a is connected to a fire sensor 3 which measures a first physical quantity whose variations make it possible to detect the existence of a fire in the vicinity of the fire sensor.
  • This fire sensor can for example be an ionic smoke detection sensor, or optionally an optical smoke detection sensor, or the like.
  • the fire sensor sends to the first entry analog 2a of the microprocessor an analog electrical signal i which has a value (for example intensity or voltage) representative of the first physical quantity.
  • This measurement signal i is disturbed by at least one second physical quantity different from the first, for example by ambient temperature, or also by ambient humidity or pressure in the case of an ion sensor.
  • the detector 1 further comprises a correction sensor 4 which measures the second physical quantity, and which is connected to the second analog input 2b of the microprocessor to send this microprocessor an analog electrical signal ⁇ , said correction signal, which has a value (for example intensity or voltage) representative of the second physical quantity.
  • a correction sensor 4 which measures the second physical quantity, and which is connected to the second analog input 2b of the microprocessor to send this microprocessor an analog electrical signal ⁇ , said correction signal, which has a value (for example intensity or voltage) representative of the second physical quantity.
  • the microprocessor 2 has an internal memory, or possibly it can be connected to an external memory, in which case the central unit is constituted by the microprocessor and its external memory.
  • this memory is stored, in the form of a table of values, a curve c such as that shown in FIG. 2, giving, as a function of the correction signal ⁇ , a normal value iO of the measurement signal in the absence of fire.
  • the microprocessor 2 is programmed to permanently determine the value of iO corresponding to the correction signal ⁇ and to compare the measurement signal i to this value iO: if the measurement signal i is not between iO - ⁇ l and iO + ⁇ 2, where ⁇ l and ⁇ 2 are predetermined values (for example, ⁇ l and ⁇ 2 can be 5% of iO), the microprocessor 2 deduces therefrom the existence of a fire in the vicinity of the detector 1, and transmits a signal d alarm to a central unit 5, by any known connection means, such as connection to current loops, bus connection, etc.
  • the detector 1 may include several correction sensors 4, 6 each connected to an analog input 2b, 2c of the microprocessor 2, without departing from the scope of the invention.
  • the microprocessor 2 has in memory a correspondence table giving, as a function of the correction signals transmitted by the various correction sensors, the normal values iO of the measurement signal in the absence of fire.
  • the microprocessor 2 then continuously calculates the normal value iO of the measurement signal and then compares the value of the measurement signal i received at its analog input 2a with the normal value iO, as explained above, to determine if there is a fire.
  • the calculation of the normal value iO could be carried out by means of an algorithm stored in the microprocessor 2 or in an external memory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
EP95926986A 1994-07-29 1995-07-27 Brandmelder mit korrektur von störparametern Expired - Lifetime EP0772855B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9409471A FR2723235B1 (fr) 1994-07-29 1994-07-29 Dispositifs de detection d'incendie comportant un capteur de correction
FR9409471 1994-07-29
PCT/FR1995/001016 WO1996004631A1 (fr) 1994-07-29 1995-07-27 Dispositif de detection d'incendie avec correction de parametres perturbateurs

Publications (2)

Publication Number Publication Date
EP0772855A1 true EP0772855A1 (de) 1997-05-14
EP0772855B1 EP0772855B1 (de) 1998-12-02

Family

ID=9465920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95926986A Expired - Lifetime EP0772855B1 (de) 1994-07-29 1995-07-27 Brandmelder mit korrektur von störparametern

Country Status (6)

Country Link
EP (1) EP0772855B1 (de)
JP (1) JPH11509342A (de)
DE (1) DE69506418D1 (de)
ES (1) ES2126916T3 (de)
FR (1) FR2723235B1 (de)
WO (1) WO1996004631A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911774B1 (de) * 1997-10-21 2003-07-09 Siemens Aktiengesellschaft Raumüberwachungssensor
JP3708727B2 (ja) * 1998-10-30 2005-10-19 ホーチキ株式会社 火災感知器及び火災検出方法
JP3724689B2 (ja) * 1998-10-30 2005-12-07 ホーチキ株式会社 火災監視装置及び火災感知器
US7333129B2 (en) 2001-09-21 2008-02-19 Rosemount Aerospace Inc. Fire detection system
US6958689B2 (en) 2001-09-21 2005-10-25 Rosemount Aerospace Inc. Multi-sensor fire detector with reduced false alarm performance
JP4769933B2 (ja) * 2005-03-28 2011-09-07 国立大学法人 岡山大学 イオンセンサ及びこのイオンセンサを用いた検出器
DE102010015467B4 (de) * 2010-04-16 2012-09-27 Winrich Hoseit Brandmelder zur Überwachung eines Raumes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573243B2 (en) * 1983-08-12 1988-06-02 Vision Systems Limited Pollution detecting apparatus
EP0418409B1 (de) * 1989-09-19 1996-01-03 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Berücksichtigung klimatischer Umgebungseinflüsse auf automatische Brandmelder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9604631A1 *

Also Published As

Publication number Publication date
JPH11509342A (ja) 1999-08-17
EP0772855B1 (de) 1998-12-02
FR2723235B1 (fr) 1996-10-18
DE69506418D1 (de) 1999-01-14
ES2126916T3 (es) 1999-04-01
WO1996004631A1 (fr) 1996-02-15
FR2723235A1 (fr) 1996-02-02

Similar Documents

Publication Publication Date Title
AU2007202230B2 (en) Thermometer calibration
FR2514497A1 (fr) Dispositif de detection numerique de niveau par fil chaud
US9322724B2 (en) Algorithm for detecting activation of a push button
EP0726630B1 (de) Verfahren und Vorrichtung zur Bestimmung der Dichte eines Isoliergases in einer elektrischen Anlage
FR2882141A1 (fr) Procede et dispositif pour detecter au sol l'obstruction d'une prise de pression d'un capteur de pression statique d'un aeronef
EP0772855B1 (de) Brandmelder mit korrektur von störparametern
WO2009103419A1 (fr) Procédé d'étalonnage d'un capteur de mesure
EP0187562B1 (de) Durchflussmesser mit einem temperaturempfindlichen Widerstandselement
EP0176448A2 (de) Vorrichtung zum Nachweis eines Lichtbündels, unter Verwendung einer Photodiode, mit einer Schaltung zur Einstellung des Arbeitspunktes
EP0930507B1 (de) Messanordnung für Wechselstrom oder Gleichstrom
WO2004062052A3 (en) Method and apparatus to sense temperature of thermal tuning elements in tunable optical devices
FR2601473A1 (fr) Dispositif d'introduction de donnees dans un microprocesseur, notamment pour la commande d'un lave-linge
EP1014522B1 (de) Verfahren zur Messung der Dichte eines dielektrischen Gases in einer erdverlegten gekapselten Leitung
EP1336857B1 (de) Anordnung zur Bestimmung des Ladezustands einer Batterie, insbesondere zur Verwendung in einem Kraftfahrzeug
EP0910809A1 (de) Regenmesser
EP0544589A1 (de) Gerät zur Messung des realen Lastfaktors eines elektrischen Generators
EP0772851B1 (de) Feueralarmvorrichtung mit analogem sensor
FR2623617A1 (fr) Dispositif pour la mesure d'un debit de fluide dans une canalisation
EP0169288B1 (de) Temperaturkompensationseinrichtung für einen Sensor und Einstellverfahren
EP0594483A1 (de) Verfahren und Vorrichtung zum Messen eines physikalischen Parameters, insbesondere der Temperatur in einen Zimmer oder Fahrzeug
FR2847980A1 (fr) Capteur de temperature utilisable dans un environnement soumis a un rayonnement electromagnetique
JP3608049B2 (ja) 煙感知器
FR2708121A1 (fr) Dispositif de détection d'une caractéristique liée directement ou indirectement à l'incendie.
FR2646907A1 (fr) Dispositif de mesure de niveau et/ou de volume de liquide dans un reservoir
WO2021104712A1 (fr) Capteur anti-bruit pour vehicule automobile

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970203

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19980325

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ORWIN

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SMYCZ, EUGENIUSZ

Inventor name: LEWINER, JACQUES

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB

REF Corresponds to:

Ref document number: 69506418

Country of ref document: DE

Date of ref document: 19990114

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990122

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990303

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2126916

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20000628

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000721

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20000801

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010727

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010731

BERE Be: lapsed

Owner name: ORWIN

Effective date: 20010731

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010727

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020810

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20130725

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140731