A kind of pollution gas composition and concentration detection method
A technology for the detection of polluted gases and concentrations, which can be used in measurement devices, diffusion analysis, analysis materials, etc., and can solve the problem of inability to detect multiple gas components simultaneously
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Embodiment 1
[0059] A specific embodiment of the present invention discloses a method for detecting the composition and concentration of polluted gas, such as figure 1 shown, including the following steps.
[0060] S1. Arrange multi-channel gas acquisition equipment, and set up a single gas sensor in each channel;
[0061] S2. Introduce polluted gas into the multi-channel gas collection device, determine the component type of the polluted gas by a single gas sensor in each channel, and obtain an electrical signal corresponding to the gas concentration of each component type;
[0062] S3. Analyze the above-mentioned electrical signal, and determine the gas concentration of each component type in combination with the pre-calibrated detection sensitivity;
[0063] S4. For each component type of gas, according to its gas concentration combined with the gas turbulent diffusion model, obtain the release rate of the pollution source to the gas, and then output the detection result including all ...
Embodiment 2
[0067] Improvements are made on the basis of Example 1, and the factors affecting the accuracy of the collection results are mainly environmental factors, such as temperature, humidity and electromagnetic interference. By designing a signal conditioning circuit with the same connection structure of the main electrode and the auxiliary electrode, the influence of the circuit structure on the detection sensitivity is actually eliminated. Furthermore, the influence of environmental factors on the detection sensitivity can be eliminated by making a difference between the two outputs.
[0068] Preferably, the method adopts the following steps to calibrate the detection sensitivity:
[0069] S01. Pass clean air that does not contain polluted gas into a certain channel of the multi-channel gas collection device, and collect the initial voltage V of the main electrode and auxiliary electrode at the output end of a single gas sensor in the channel after stabilization. 01 , V 02 ;
...
Embodiment 3
[0097] The present invention also provides an integrated multi-channel pollution gas concentration detection device using the method described in Embodiment 1, such as figure 2 As shown, it includes a multi-channel gas acquisition device and an ARM processor connected in sequence.
[0098] The multi-channel gas collection device is used to collect the incoming polluted gas, determine the component types of the polluted gas, and send an electrical signal corresponding to the gas concentration of each component type to the ARM processor. The polluted gas contains more than one component species, such as CO, SO 2 , NO, NO 2 Wait.
[0099]The ARM processor is used to analyze the above-mentioned electrical signal, and determine the gas concentration of each component type in combination with the pre-calibrated detection sensitivity, and then obtain the release rate of the pollution source to each component type gas according to the gas turbulent diffusion model, and then All co...
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