CN112229958A - Combustible gas detection device with compensation function and compensation method - Google Patents
Combustible gas detection device with compensation function and compensation method Download PDFInfo
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- CN112229958A CN112229958A CN202011091343.5A CN202011091343A CN112229958A CN 112229958 A CN112229958 A CN 112229958A CN 202011091343 A CN202011091343 A CN 202011091343A CN 112229958 A CN112229958 A CN 112229958A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
Abstract
The invention discloses a combustible gas detection device with a compensation function and a compensation method, which are characterized in that reading sets with different temperatures and different humidities and gas collection concentrations under different reading sets are collected, and a regression function of a matlab program is utilized to perform a binary polynomial fitting analysis method to obtain a function of a correction coefficient of the gas collection concentration which reacts with the real gas concentration through temperature and humidity variable compensation, so that the real gas concentration is obtained. The invention can greatly improve the detection precision of the combustible gas detection device and improve the accuracy of detection data by compensating the measured value of the gas concentration.
Description
Technical Field
The invention relates to the technical field of gas detection devices, in particular to a combustible gas detection device with a compensation function and a compensation method.
Background
The detection precision of the combustible gas detection device is determined by the measurement precision of the gas concentration measurement device, the gas concentration measurement device realizes the detection of combustible gas through a gas sensor, and currently, in the prior art, when the combustible gas detection device detects gas, the influence of temperature and humidity on the detection precision of the gas sensor is not usually considered, so that the deviation between the obtained gas concentration and the actual concentration is larger.
The patent with the granted publication number of 'CN 102680518A' discloses a compensation type gas sensor and a temperature and humidity compensation method thereof, which considers the influence of temperature and humidity on the detection precision of the gas sensor, queries a database by establishing a compensation coefficient, queries a corresponding compensation coefficient in the database during application, and then multiplies a measured value with the compensation coefficient to obtain a real gas concentration value. However, this method requires a lot of data to be established, and a lot of query work is required in the practical application process, which is very inconvenient to use.
Disclosure of Invention
The invention aims to provide a combustible gas detection device with a compensation function and a compensation method.
The invention is realized by the following technical scheme:
a compensation method of a combustible gas detection device with a compensation function comprises the steps of firstly establishing a compensation algorithm model of a gas concentration measured value, and compensating the measured value of the gas concentration;
the method for establishing the compensation algorithm model comprises the following steps:
s1, collecting reading sets [ T, RH ] of different temperatures T and different humidities RH through a detection device]Collecting different reading sets [ T, RH ] by a detecting device]Measured concentration of gas C(T,RH)；
S2, obtaining the measured gas concentration C by applying the data collected in the step S1 and performing a method of fitting and analyzing a binary polynomial through a regress function of a matlab program(T,RH)The real gas concentration C is compensated and reacted by the temperature T and the humidity RH variable0Function f (T, RH) of correction factor(s) of (d):
solving corresponding fitting coefficients by using regress function of matlab program
a0、a1、a2、a3、a4、a5、a6、a7… …, respectively; the function f (T, RH) relation of the correction coefficients under different temperatures T and different humidities RH can be obtained;
by transforming formulae
The gas collection concentration C under different temperature T and different humidity RH can be obtained(T,RH)Converted into compensated real gas concentration C0。
The invention also provides a combustible gas detection device for realizing the compensation method, which comprises a display screen, a pipeline with a gas inlet and a gas outlet, and a signal amplification module, a signal processing module and a control module which are sequentially and electrically connected, wherein the pipeline is sequentially provided with a temperature and humidity measurement device, a gas concentration compensation module, a gas concentration measurement device and a vacuum pump;
the gas concentration measuring device is electrically connected with the signal amplification module, the vacuum pump is electrically connected with the control module, and the gas concentration compensation module is respectively electrically connected with the temperature and humidity measuring device and the signal processing module; the display screen is respectively and electrically connected with the temperature and humidity measuring device and the signal processing module.
Optionally, an adsorption box is connected in front of the temperature and humidity measuring device, and an SDG adsorbent is arranged in the adsorption box.
Optionally, a dust filtering device is connected in front of the temperature and humidity measuring device.
Optionally, the signal processing module is further electrically connected with an alarm module, and the alarm module is electrically connected with an alarm.
Optionally, still include explosion-proof shell, temperature and humidity measuring device, gas concentration compensation module, gas concentration measuring device, vacuum pump, signal amplification module, signal processing module and control module all set up in explosion-proof shell's inside, the display screen sets up the outside at explosion-proof shell.
Optionally, the device further comprises a gas storage tank connected with the gas inlet, and standard concentration combustible gas at a certain temperature and a certain humidity is stored in the gas storage tank.
The invention has at least the following advantages and beneficial effects: according to the method, the function of the correction coefficient of the gas collection concentration which reacts to the real gas concentration through temperature and humidity variable compensation is obtained by collecting the reading sets with different temperatures and different humidities and the gas collection concentration under the different reading sets and then utilizing the regression function of the matlab program to perform the fitting analysis of the binary polynomial, so that the real gas concentration is obtained; the invention can greatly improve the detection precision of the combustible gas detection device and improve the accuracy of detection data by compensating the measured value of the gas concentration.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a combustible gas detection device with compensation function according to the present invention;
icon: the system comprises a display screen, a pipeline 2, a gas inlet 21, a gas outlet 22, an amplification module 3, a signal processing module 4, a control module 5, a temperature and humidity measuring device 6, a gas concentration compensation module 7, a gas concentration measuring device 8, a vacuum pump 9, an adsorption box 10, a dust filtering device 11, an alarm module 12, an alarm 13 and an explosion-proof shell 14.
Detailed Description
A compensation method of a combustible gas detection device with a compensation function comprises the steps of firstly establishing a compensation algorithm model of a gas concentration measured value, and compensating the measured value of the gas concentration;
the method for establishing the compensation algorithm model comprises the following steps:
s1, collecting reading sets [ T, RH ] of different temperatures T and different humidities RH through a detection device]Collecting different reading sets [ T, RH ] by a detecting device]Measured concentration of gas C(T,RH)；
S2, obtaining the measured gas concentration C by applying the data collected in the step S1 and performing a method of fitting and analyzing a binary polynomial through a regress function of a matlab program(T,RH)The real gas concentration C is compensated and reacted by the temperature T and the humidity RH variable0Function f (T, RH) of correction factor(s) of (d):
solving corresponding fitting coefficients by using regress function of matlab program
a0、a1、a2、a3、a4、a5、a6、a7… …, respectively; the function f (T, RH) relation of the correction coefficients under different temperatures T and different humidities RH can be obtained;
by transforming formulae
Different temperatures T and different humidities can be obtainedGas collection concentration C at degree RH(T,RH)Converted into compensated real gas concentration C0。
The invention also provides a combustible gas detection device for realizing the compensation method, which comprises a display screen, a pipeline with a gas inlet and a gas outlet, and a signal amplification module, a signal processing module and a control module which are sequentially and electrically connected, wherein the pipeline is sequentially provided with a temperature and humidity measurement device, a gas concentration compensation module, a gas concentration measurement device and a vacuum pump.
The temperature and humidity measuring device, the gas concentration compensation module, the gas concentration measuring device, the vacuum pump, the signal amplification module, the signal processing module and the control module are all arranged inside the explosion-proof shell, and the display screen is arranged outside the explosion-proof shell.
The gas concentration measuring device is electrically connected with the signal amplification module, the vacuum pump is electrically connected with the control module, and the gas concentration compensation module is respectively electrically connected with the temperature and humidity measuring device and the signal processing module; the display screen is respectively and electrically connected with the temperature and humidity measuring device and the signal processing module after compensation.
The detection device provided by the invention can be particularly applied to detecting the interior of a storage battery, the storage battery can generate hydrogen and hydrogen sulfide gas in the charging and discharging processes, the hydrogen is flammable and explosive, the explosion limit of the hydrogen is 4.0-75.6% (volume concentration), the hydrogen sulfide is extremely toxic, the hydrogen sulfide can be mixed with air to form an explosive mixture, the explosive mixture can be combusted and exploded when meeting open fire and high heat energy, and the explosion limit is 4.3-45.0% (volume concentration).
In this embodiment, the vacuum pump may be a micro variable frequency vacuum pump, the control module preferably selects a PWM control module, that is, a pulse width modulation control module, and the control module may send a PWM adjustment signal to the vacuum pump to adjust the suction flow rate of the vacuum pump. The temperature and humidity measuring device can be a temperature and humidity sensor, and can also be a thermometer and a hygrometer; the gas concentration measuring device is a hydrogen sensor and a hydrogen sulfide sensor, and a matlab program is arranged in the gas concentration compensation module and used for performing binary polynomial fitting analysis on data acquired by the temperature and humidity measuring device and the gas concentration measuring device so as to establish a compensation algorithm model.
In this embodiment, be connected with before the temperature and humidity measuring device and adsorb the box, be equipped with the SDG adsorbent in adsorbing the box. It is worth to be noted that, in the charging and discharging process of the storage battery, certain acidic substances can be generated while combustible gas is released, and the acidic substances can corrode the detection device and influence the detection precision of gas components; the SDG adsorbent is a solid granular inorganic substance with large specific surface area, and when acid gas in the purified gas reaches the surface adsorption force field of the SDG adsorbent by diffusion movement, the acid gas is fixed on the surface of the SDG adsorbent and then chemically reacts with active ingredients in the SDG adsorbent to generate a new neutral salt substance which is stored in the structure of the SDG adsorbent.
In this embodiment, be connected with dust filter before the temperature and humidity measuring device, the dust in the gas can be filtered, improves detection device's life, and dust filter selects the dust filter who commonly uses among the prior art.
In the embodiment, the signal processing module is also electrically connected with an alarm module, and the alarm module is electrically connected with an alarm; when the hydrogen concentration or the hydrogen sulfide concentration is higher than a set threshold (for example, 15% LEL-25% LEL), an alarm signal is sent out to remind a user of starting the ventilation system.
In this embodiment, still including the gas holder that is used for connecting the air inlet, the gas holder is the standard concentration combustible gas who has stored under certain temperature, certain humidity, during the in-service use, can let in the standard concentration combustible gas who stores from the air inlet, and the concentration value contrast of the detection concentration value that obtains through detecting device and standard concentration combustible gas, so, can realize detecting device's self-checking, is convenient for know detecting device's detection precision at any time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A compensation method of a combustible gas detection device with a compensation function is characterized in that: firstly, establishing a compensation algorithm model of a gas concentration measured value, and compensating the measured value of the gas concentration;
the method for establishing the compensation algorithm model comprises the following steps:
s1, collecting reading sets [ T, RH ] of different temperatures T and different humidities RH through a detection device]Collecting different reading sets [ T, RH ] by a detecting device]Measured concentration of gas C(T，RH)；
S2, obtaining the measured gas concentration C by applying the data collected in the step S1 and performing a method of fitting and analyzing a binary polynomial through a regress function of a matlab program(T，RH)The real gas concentration C is compensated and reacted by the temperature T and the humidity RH variable0Function f (T, RH) of correction factor(s) of (d):
solving corresponding fitting coefficients by using regress function of matlab program
a0、a1、a2、a3、a4、a5、a6、a7...; obtaining correction coefficients f (T, RH) at different temperatures T and different humidities RH;
by transforming formulae
The gas collection concentration C under different temperature T and different humidity RH can be obtained(T，RH)Converted into compensated real gas concentration C0。
2. A combustible gas detection device with compensation function for implementing the compensation method according to claim 1, characterized in that: the device comprises a display screen, a pipeline with an air inlet and an air outlet, and a signal amplification module, a signal processing module and a control module which are sequentially and electrically connected, wherein the pipeline is sequentially provided with a temperature and humidity measuring device, a gas concentration compensation module, a gas concentration measuring device and a vacuum pump;
the gas concentration measuring device is electrically connected with the signal amplification module, the vacuum pump is electrically connected with the control module, and the gas concentration compensation module is respectively electrically connected with the temperature and humidity measuring device and the signal processing module; the display screen is respectively and electrically connected with the temperature and humidity measuring device and the signal processing module.
3. The combustible gas detection device with compensation function according to claim 2, wherein: an adsorption box is connected in front of the temperature and humidity measuring device, and an SDG adsorbent is arranged in the adsorption box.
4. The combustible gas detection device with compensation function according to claim 2, wherein: and a dust filtering device is connected in front of the temperature and humidity measuring device.
5. The combustible gas detection device with compensation function according to claim 2, wherein: the signal processing module is also electrically connected with an alarm module, and the alarm module is electrically connected with an alarm.
6. The combustible gas detection device with compensation function according to claim 2, wherein: the temperature and humidity measuring device, the gas concentration compensation module, the gas concentration measuring device, the vacuum pump, the signal amplification module, the signal processing module and the control module are all arranged inside the explosion-proof shell, and the display screen is arranged outside the explosion-proof shell.
7. The combustible gas detection device with compensation function according to claim 2, wherein: still including being used for connecting the gas holder of air inlet, the storage has the standard concentration combustible gas under certain temperature, certain humidity in the gas holder.
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| CN101196435A (en) * | 2007-12-26 | 2008-06-11 | 江苏大学 | Vehicle fuel oil consumption testing device through exhaustion dilution measurement |
| CN102680518A (en) * | 2012-05-31 | 2012-09-19 | 河南汉威电子股份有限公司 | Compensation type gas sensor and humiture compensation method thereof |
| CN106404126A (en) * | 2016-08-31 | 2017-02-15 | 赵雪至 | Compensation method and metering device for flow measurement of multi-component gas |
| CN110009874A (en) * | 2019-04-12 | 2019-07-12 | 泰州职业技术学院 | A kind of flammable gas alarm, combustible gas alarm method and system |
| CN110018275A (en) * | 2019-04-10 | 2019-07-16 | 南京能启能电子科技有限公司 | A kind of gas detector with compensation function and compensation method |
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2020
- 2020-10-13 CN CN202011091343.5A patent/CN112229958A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196435A (en) * | 2007-12-26 | 2008-06-11 | 江苏大学 | Vehicle fuel oil consumption testing device through exhaustion dilution measurement |
| CN102680518A (en) * | 2012-05-31 | 2012-09-19 | 河南汉威电子股份有限公司 | Compensation type gas sensor and humiture compensation method thereof |
| CN106404126A (en) * | 2016-08-31 | 2017-02-15 | 赵雪至 | Compensation method and metering device for flow measurement of multi-component gas |
| CN110018275A (en) * | 2019-04-10 | 2019-07-16 | 南京能启能电子科技有限公司 | A kind of gas detector with compensation function and compensation method |
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Application publication date: 20210115 |