EP2860715A1 - Procédé et agencement d'identification de concentrations de gaz en tant que dispositif d'alarme dans l'air - Google Patents

Procédé et agencement d'identification de concentrations de gaz en tant que dispositif d'alarme dans l'air Download PDF

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Publication number
EP2860715A1
EP2860715A1 EP20140401095 EP14401095A EP2860715A1 EP 2860715 A1 EP2860715 A1 EP 2860715A1 EP 20140401095 EP20140401095 EP 20140401095 EP 14401095 A EP14401095 A EP 14401095A EP 2860715 A1 EP2860715 A1 EP 2860715A1
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European Patent Office
Prior art keywords
sensor
temperature
sensors
measurement
evaluation
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EP20140401095
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German (de)
English (en)
Inventor
Christoph Burghardt
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Individual
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    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire

Definitions

  • the invention relates to a method and an arrangement for identifying gas concentrations as danger detectors in the air, where parameters are evaluated by means of data processing using reference and / or classification patterns and, depending on the results of the evaluation, an alarm output and / or visualization takes place.
  • a font is known WO 2005/119 618 A2 "Fire alarm algorithm with smoke and gas sensor".
  • an apparatus and a method are described, which are useful for the detection of fires.
  • concentrations of carbon monoxide, carbon dioxide and smoke there is a comprehensive record of concentrations of carbon monoxide, carbon dioxide and smoke in the environment.
  • the time of the increase rates in each level is documented and a corresponding alarm is triggered when a fault value is detected.
  • the object of the invention is to find a method and an arrangement for the identification of gas concentrations in the air, wherein a high accuracy with a low cross sensitivity with the aid of extension sensors of certain parameters is achieved and the disadvantage of the prior art by influencing environmental influences, which lead to measured value corruption, is compensated.
  • Measured value methods for the detection of hazardous and toxic gas concentrations, such as occur in fires are known.
  • chemical, semiconductor gas sensors and optical sensors in the range of CO and CO2 are used.
  • all these sensors use a measurement time> 2s to achieve the corresponding results.
  • the new method according to the invention differs in that, in the first method step, measurement times of one second are achieved and at the same time a high recognition reliability and lowest false alarm is produced.
  • the method allows rapid detection of hazardous gases and smoldering fires.
  • the method according to the invention is not so much aimed at the general fire detection by means of CO and CO2, but at a highly efficient early detection with a very low false alarm rate.
  • No multi-sensor system is needed, just CO and CO2 sensors. It is believed that the use of CO and CO2 sensors for the detection of general fires is state of the art. The state of the art is also that at high CO and high CO2 concentrations is likely to be a fire, since high natural CO levels do not occur in nature. This evaluation also use many CO detectors, which are already known.
  • the peculiarity of the method according to the invention is the detection of gas concentrations already in the smoldering fire phase arise and are not detected by previous sensor combinations or too late. For this purpose, accurate measured values must be determined and evaluated. In order to achieve high measuring accuracy, the existing sensor drift is compensated and external environmental influences are eliminated. Furthermore, a very high long-term stability is achieved and the false alarm rate is kept below 0.1%. A reliable fire detection is carried out with the inventive method already from 50 ppm CO concentration, in which there is no health risk.
  • the inventive method is based on two levels of detection of gas concentrations, in particular of a CO concentration.
  • the CO or CO2 concentration or temperature is sampled once per second.
  • the attachment of molecules in the CO or CO2 sensor is a dynamic process and requires a chemical equilibrium.
  • the mathematical function for achieving the GG is known. Shortening the measurement, the GG is no longer reached. In the first stage, short measurement times are needed, which are less than one second. It is a slightly worse resolution due to the unfinished equilibrium process accepted. If there is no danger detection in this phase, it will continue to measure in this mode. If a signal is detected, the measuring time is automatically extended, so the resolution significantly improve.
  • This measurement algorithm is extremely energy-efficient, as it is carried out in the charge balance method. Thus, it can also be operated by battery-based systems over a long period of time. If a detection event occurs in the first method step, a second method step is started with the entire electronic evaluation.
  • both CO and CO 2 concentrations are determined with a longer measurement time.
  • all environmental parameters are measured and their influences on the measurement result are corrected in order to increase the measuring accuracy.
  • the data thus corrected are fed to a neural network or other intelligent evaluation method which classifies the fire probability.
  • no thresholds for the gas concentrations are needed, making the system very stable and reproducible.
  • the evaluation of the measurement results is done via a ⁇ Controller.
  • another sensor can be added without major technical changes, which extends the system by a gas component, such as methane.
  • a gas component such as methane.
  • the system can also be used as a leak detector for Natural gas can be used.
  • Other sensors or combinations are possible.
  • a repeated execution shows the individual process steps for the identification of gas concentrations in the air.
  • the evaluation of the CO and / or CO 2 concentration is carried out in an algorithm with one measurement per second.
  • a very fast detection takes place.
  • a second process section is switched on, which is executed in longer measuring sections and in this case evaluates CO, CO2, air pressure, temperature and humidity as measurement results.
  • Another special process step is the correction of the long-term drift of CO and CO2 sensors. Subsequently, a normalization of the sensor data take place. Further supply of the given measurement data to a neural network or other intelligent evaluation units can specify the evaluation of the measurement result.
  • the complexity of the method results from the many combinations of sensor data.
  • a CO2 sensor with a long service life and lower Cross-sensitivity On the base board are in particular a CO2 sensor with a long service life and lower Cross-sensitivity, a CO sensor with a long service life and low cross-sensitivity and an expansion sensor for temperature, pressure, humidity, light, etc. available. These sensors are merged into a sensor data fusion and used for evaluation and risk assessment. An alarm output and visualization are carried out via the evaluation and hazard assessment.
  • the FIG. 2 illustrates a CO2 module for schools and conference rooms.
  • the light sensor serves to increase the operating time.
  • the base board A is equipped with a CO2 sensor 1, a sensor light 6, a module solar operation 5V 12 and an LED display 14th
  • the base board A has a dimension of 55 x 70 mm 2 .
  • the inventive method is based on two levels of detection of gas concentrations, in particular of a CO concentration.
  • the CO or CO2 concentration or temperature is sampled once per second.
  • the attachment of molecules in the CO sensor is a dynamic process and requires a chemical equilibrium.
  • the mathematical function for achieving the GG is known. Shortening the measurement, the GG is no longer reached. In the first stage, short measurement times are needed, which are less than one second. It is a slightly worse resolution due to the unfinished equilibrium process accepted. If there is no danger detection in this phase, it will continue to measure in this mode. When a signal is detected, the measurement time is automatically extended to significantly improve the resolution.
  • This measurement algorithm is extremely energy-efficient, as it is carried out in the charge balance method. Thus, it can also be operated by battery-based systems over a long period of time. If a detection event occurs in the first method step, a second process step is started with the entire electronic evaluation.
  • both CO and CO 2 concentrations are determined with a longer measurement time.
  • all environmental parameters are measured and their influences on the measurement result are corrected in order to increase the measuring accuracy.
  • the data thus corrected are fed to a neural network or other intelligent evaluation method which classifies the fire probability.
  • no thresholds for the gas concentrations are needed, making the system very stable and reproducible.
  • the evaluation of the measurement results is done via a ⁇ controller.
  • another sensor can be added without major technical changes, which extends the system by a gas component, such as methane.
  • a gas component such as methane.
  • the system can also be used as a leak detector for natural gas.
  • Other sensors or combinations are possible.
  • a repeated execution shows the individual process steps for the identification of gas concentrations in the air.
  • a first process step the evaluation of the CO and / or CO 2 concentration in an algorithm with one measurement per second carried out.
  • a very fast detection takes place.
  • Another special process step is the correction of the long-term drift of CO and CO2 sensors. Subsequently, a normalization of the sensor data take place. Further supply of the given measurement data to a neural network or other intelligent evaluation units can specify the evaluation of the measurement result.
  • This danger detector in the form of the base board A is not a conventional fire detector, but a sensor module to increase safety in homes, schools, workspaces and other essential.
  • the temperature and humidity can be helpful as additional information providers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
EP20140401095 2013-10-08 2014-10-08 Procédé et agencement d'identification de concentrations de gaz en tant que dispositif d'alarme dans l'air Ceased EP2860715A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013111111 2013-10-08

Publications (1)

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EP2860715A1 true EP2860715A1 (fr) 2015-04-15

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EP20140401095 Ceased EP2860715A1 (fr) 2013-10-08 2014-10-08 Procédé et agencement d'identification de concentrations de gaz en tant que dispositif d'alarme dans l'air

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EP (1) EP2860715A1 (fr)
DE (1) DE102014114576A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016111817A1 (de) * 2016-06-28 2017-12-28 Prüftechnik Dieter Busch AG Datensammler sowie Einrichtung und Verfahren zum Sammeln von Messdaten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110379142A (zh) * 2019-07-02 2019-10-25 大唐微电子技术有限公司 一种校准报警信息的方法、装置、计算机存储介质及终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065140A (en) * 1991-03-08 1991-11-12 Bell Communications Research, Inc. Early warning reactive gas detection system
US5554273A (en) * 1995-07-26 1996-09-10 Praxair Technology, Inc. Neural network compensation for sensors
WO2005119618A2 (fr) 2004-02-11 2005-12-15 Southwest Sciences Incorporated Algorithme d'alarme incendie utilisant un detecteur de fumee et de gaz
WO2010070360A1 (fr) * 2008-12-19 2010-06-24 Dinkeys Limited Dispositif de détection personnel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065140A (en) * 1991-03-08 1991-11-12 Bell Communications Research, Inc. Early warning reactive gas detection system
US5554273A (en) * 1995-07-26 1996-09-10 Praxair Technology, Inc. Neural network compensation for sensors
WO2005119618A2 (fr) 2004-02-11 2005-12-15 Southwest Sciences Incorporated Algorithme d'alarme incendie utilisant un detecteur de fumee et de gaz
WO2010070360A1 (fr) * 2008-12-19 2010-06-24 Dinkeys Limited Dispositif de détection personnel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016111817A1 (de) * 2016-06-28 2017-12-28 Prüftechnik Dieter Busch AG Datensammler sowie Einrichtung und Verfahren zum Sammeln von Messdaten

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