Quality control method suitable for remote quality control system of gas multi-parameter monitor

Abstract

The invention provides a quality control method suitable for a remote quality control system of gas multi-parameter monitor. The remote quality control system comprises a multi-way valve, a zero gas generator, a standard gas cabinet, a mixed gas chamber, a control module and an industrial personal computer; according to the quality control method, the control module adopts a PID algorithm, parameters in ax and ey are finely adjusted in the quality control process respectively, and when the parameters of a first mass flow controller are adjusted, ax'+ey=z is obtained, and when the parameters of a second mass flow controller are adjusted, ax+ey'=z is obtained until the output standard gas detected by atmospheric monitoring national standard equipment is z, the configuration parameter x' of the first mass flow controller and the configuration parameter y' of the second mass flow controller are obtained.

Description

technical field [0001] The invention relates to a remote quality control system, in particular to a quality control method suitable for the remote quality control system of a gas multi-parameter monitor. Background technique [0002] There are usually two types of existing calibration and quality control methods. One is that inspectors bring standard gas or equipment to the site for manual calibration or quality control. Another way is remote quality control or online quality control, that is, dynamic quality control of gas monitoring through the Internet. Standard gas, zero gas generator, multi-way valve, mass flow controller, flow controller, etc. are used to mix in the mixing chamber to generate different concentrations of standard gas to be tested. After the verification of the national standard equipment for atmospheric monitoring, the corresponding mass flow The parameters of the controller are saved to the industrial computer through the control module. When actual...

AI Technical Summary

Problems solved by technology

However, the existing remote quality control or online quality control can usually only be configured with a single standard gas concentration, while the existing atmospheric multi-parameter monitors mostly have multiple parameter measurement functions

In this case, the existing remote quality control instrument or online quality control instrument cannot meet the quality control or calibration requirements of the atmospheric multi-parameter monitor

That is to say, the main disadvantage of the existing quality control instrument is that the configuration of standard gas types is limited, which cannot meet the needs of atmospheric multi-parameter monitors

In addition, the pipe material of the existing quality control instrument will have a certain adsorption effect on the standard gas, and the adsorption effect will intensify as time changes.

In this case, the accuracy of the gas concentration obtained by using a single configuration parameter cannot be guaranteed

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