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Gas sensor test system for dynamic and static gas distribution dual purposes

A technology of gas sensor and static gas distribution, applied in standard gas analyzers, analyzing gas mixtures, instruments, etc., can solve the problems of single dynamic or static gas sensitivity test method of gas sensor test system, affecting the performance of gas sensor, etc., to achieve Performance calibration and testing, solving uncontrollable air humidity, and avoiding the effect of gas accumulation

Inactive Publication Date: 2016-08-17
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The gas sensor test systems currently developed only use dynamic or static gas sensing test methods, but in the process of gas sensor development, it is necessary to simulate different gas environments according to the application, including relatively static gas and flowing gas environments. These environmental factors will ultimately affect the calibration of gas sensor performance

Method used

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  • Gas sensor test system for dynamic and static gas distribution dual purposes
  • Gas sensor test system for dynamic and static gas distribution dual purposes
  • Gas sensor test system for dynamic and static gas distribution dual purposes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The invention relates to the test of the dynamic and static dual-purpose gas test system under static liquid vapor.

[0072] The realization of static mixed gas distribution is as follows:

[0073] According to the gas state equation PV=nRT (1)

[0074] Where P is the gas pressure, V is the gas volume, n is the number of moles of gas molecules, R is the gas constant, and T is the gas temperature. For a certain concentration of gas the volume is:

[0075] V=C ppm ×V C (2)

[0076] where C ppm is the gas concentration, V C is the volume of the test chamber.

[0077] For an organic liquid, its volume V C The relationship between and the number of moles n is:

[0078] V L =m / ρ=nM / ρ (3)

[0079] Where M is the molecular weight, ρ is the mass density of the organic liquid, and m is the mass of the organic liquid.

[0080] Thus the organic liquid volume V is obtained C and its vaporized concentration C ppm The relationship between is:

[0081] V L = P C ppm ...

Embodiment 2

[0092] The present invention relates to the test of the dynamic and static dual-purpose gas sensor under dynamic gas.

[0093] The gas sensor to be tested is installed on the sensor base 20 in the test cavity, and its output signal is connected to the external data collector 18 through the wire and the aviation connector 9 on the test cavity 1, and the data output of the data collector 18 is The terminal is connected with the data signal input terminal of the computer 19, and the computer 19 completes the data collection and storage.

[0094] Tighten the airtight hatches at both ends of the test chamber 1 through three handles 22 to make it hermetically closed, close the shut-off valve 10 on the air inlet pipeline 3, and open the shut-off valve 10 on the air outlet pipeline 4. Open the shut-off valve 10 in the dynamic gas supply unit, open the pressure reducing valve 16 in the dynamic gas supply unit and adjust the pressure simultaneously, make the gas in the gas cylinder 15 p...

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Abstract

The invention relates to a gas sensor test system for dynamic and static gas distribution dual purposes, and belongs to the technical field of gas sensor test. The system comprises: a test cavity, wherein the main body of the test cavity is a stainless steel cavity; sealed cabin ports, wherein the quantity of the sealed cabin ports is 2, the sealed cabin ports are respectively arranged at two ends of the test cavity, and every sealed cabin port is matched with a sealed cabin door; a gas inlet pipeline arranged on one of the sealed cabin ports; a gas outlet pipeline arranged on the other one of the sealed cabin ports; a humiture sensor arranged in the test cavity; a liquid injection window arranged on the sealed cabin door provided with the gas outlet pipeline and used for injecting a liquid to the test cavity; and a heating platform arranged in the test cavity, wherein the liquid injection window cooperates with the heating platform to heat the injected liquid in order to vaporize the liquid. The system can realize simulation of dynamic gas environment and static gas environment, and also can realize performance calibration and test of a gas sensor in different gas environments.

Description

technical field [0001] The invention relates to a dual-purpose gas sensor response performance testing system for dynamic gas or static liquid vapor, belonging to the technical field of gas sensor testing. Background technique [0002] With the development of industry, brought SO 2 , NOx and other environmental pollution issues, as well as CO, CH 4 , H 2 S and other common fuels caused by leakage of poisoning, explosion and other catastrophic problems, in solving these problems, it is necessary to use gas sensors to detect and monitor these gases. In order to calibrate the gas-sensing characteristics of gas sensors and their influencing factors, it is of great significance to develop a gas sensor testing system that can be used in different ways and under various environmental parameters. [0003] The gas sensor test system is mainly composed of a gas configuration part and a performance test part. According to the test method of gas, it is divided into static test and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/0006
Inventor 郑雁公陈志芸简家文
Owner NINGBO UNIV
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