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Gas concentration detection method and device

A technology for gas concentration detection and gas detection, which is applied in the direction of material resistance, can solve the problem of low detection accuracy of carbon monoxide sensors, and achieve the effect of improving accuracy

Inactive Publication Date: 2018-05-22
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a gas concentration detection method and device to at least solve the problem of low detection accuracy of carbon monoxide sensors in the related art

Method used

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  • Gas concentration detection method and device
  • Gas concentration detection method and device

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Experimental program
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Embodiment 1

[0019] This embodiment provides a gas concentration detection method, figure 1 is the flowchart of the method, such as figure 1 As shown, the method includes the following processing:

[0020] Step 101: Obtain the current signal generated by the gas sensor; wherein, the current signal is a changed current signal generated by the gas sensor absorbing the detection gas; wherein the detection gas can be toxic gases such as carbon monoxide and formaldehyde.

[0021] Step 102: converting the obtained current signal into a voltage signal;

[0022] Step 103: Use the voltage signal as the initial input value of the ordinary differential equations, and use the preset step size as the iterative step, and iteratively fit the solution of the ordinary differential equations; wherein, the ordinary differential equations are composed of Chua's circuit equation converted to get;

[0023] Step 104: Use the obtained solution of the ordinary differential equation to calibrate the concentratio...

Embodiment 2

[0035] This embodiment provides a gas concentration detection device, figure 2 is the block diagram of the device, as figure 2 As shown, the device includes the following components:

[0036] Gas sensor 21, conversion circuit 22 and processing module 23;

[0037] Among them, the gas sensor is connected to the input end of the conversion circuit, and the output end of the conversion circuit is connected to the input end of the processing module; the conversion circuit is used to convert the current signal generated by the gas sensor into a voltage signal and output it to the processing module; The voltage signal is used as the initial input value of the ordinary differential equations, and the preset step size is used as the iterative step, and the solution of the ordinary differential equations is fitted in an iterative manner, wherein the ordinary differential equations are converted from Chua's circuit equation , using the obtained solution of the ordinary differential e...

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Abstract

The invention discloses a gas concentration detection method and a gas concentration detection device which are used for solving the problem of relatively low gas concentration detection accuracy in arelated technology. The disclosed gas concentration detection method comprises the following steps: acquiring a current signal generated by a gas-sensitive element, wherein the current signal is generated when the gas-sensitive element adsorbs detection gas; converting the current signal into a voltage signal; with voltage signal as an initial input value of an ordinary differential equation setand a preset step length as an iteration step length, fitting a solution of the ordinary differential equation set in an iterative way, wherein the ordinary differential equation set is obtained by converting a Chua's circuit equation; calibrating the concentration of the detection gas by using the obtained solution of the ordinary differential equation set. Through the gas concentration detectionmethod and the gas concentration detection device, the gas concentration detection accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a gas concentration detection method and device. Background technique [0002] In daily life, carbon monoxide poisoning incidents occur from time to time, seriously endangering people's life and health. Once carbon monoxide gas exceeds a certain concentration, it will threaten people's life and health. However, because carbon monoxide gas is colorless, odorless, and difficult to detect, people often do not realize that they are already in an unhealthy environment. Therefore, for a relatively closed environment, the detection of toxic and harmful gases such as carbon monoxide should be strengthened so that people can avoid danger in time. However, at present, the general carbon monoxide gas sensor has a relatively narrow detection range and low measurement accuracy. It is often used for the detection of high-concentration carbon monoxide gas and is not suitable for low-conc...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/12
Inventor 龚安唐友志徐子恒梁飞拓
Owner GREE ELECTRIC APPLIANCES INC
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