Gas sensor test system

A gas sensor and test system technology, applied in the direction of material resistance, etc., can solve problems such as stable laminar flow in the unfavorable gas sensitivity measurement device, pressure and temperature disturbance of the gas sensitivity measurement device, affecting the test effect of the gas sensor, etc. Good performance, easy adjustment and high efficiency

Inactive Publication Date: 2012-06-13
NANJING UNIV OF TECH
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Problems solved by technology

During the switching process, the total gas flow of the pipeline will fluctuate, which will cause a certain degree of disturbance to the pressure and temperature of the gas sensitive measuring device, thereby affecting the test effect of the gas sensor
Although increasing the proportion of carrier gas in the mixed gas can alleviate this effect, it is still not conducive to the formation of stable laminar flow in the gas sensitivity measurement device, and is not conducive to cost control in commercial applications

Method used

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Examples

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Embodiment

[0034] like figure 1 As shown, this embodiment discloses a gas sensor testing system, including a gas distribution unit, a gas sensitivity measurement device, and a test unit; the gas distribution unit includes an air supply unit 1a, three gas supply units to be tested, and A gas mixing chamber 5 for uniformly mixing air and three gases to be measured, the gas mixing chamber communicates with a gas sensitivity measuring device 11, and is used to input the proportioned gas into the gas sensitivity measuring device through a pipeline. The outlet of the gas mixing chamber 5 is divided into two paths, one path is directly connected to the atmosphere through the valve 12, and the other path is connected to the gas sensitivity measurement device 11, and the pipeline connected to the gas sensitivity measurement device 11 is connected with a pressure gauge 10.

[0035] The three gas supply units to be tested are respectively a hydrogen supply unit, a methane supply unit and a carbon m...

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Abstract

The invention discloses a gas sensor test system. The system comprises a gas distribution unit, a gas sensitivity measuring device and a test unit. The gas distribution unit comprises an air supply unit, more than one tested gas supply units, and a gas mixing chamber for uniformly mixing air and the tested gas. The gas mixing chamber is communicated with the gas sensitivity measuring device, and is provide for inputting the mixed gas to the gas sensitivity measuring device through a pipeline. The test unit comprises a data acquisition device, a temperature control instrument connected with the data acquisition device, a tail gas analysis device and a computer, wherein the data acquisition device respectively forms electrical connections with the air supply unit and the gas sensitivity measuring device, and the tail gas analysis device is communicated with the gas sensitivity measuring device through a pipeline.

Description

technical field [0001] The invention relates to a gas sensor testing system, in particular to a gas sensor testing system based on a constant flow gas distribution method. Background technique [0002] With the development of industry, such as SO 2 , NO x 、H 2 The immeasurable environmental pollution caused by industrial waste gas such as S being discharged into the atmosphere, CO, H 2 、H 2 S and CH 4 A series of disastrous problems such as poisoning and explosions that endanger people's lives and property safety due to leakage problems in the production, transportation, and use of commonly used fuels. These behaviors related to people's livelihood are attracting more and more people's attention. However, in the process of monitoring these gases, there are more or less phenomena that need to use large-scale instrument analysis, or use expensive and complicated monitoring systems. Microstructure Semiconductor Metal Oxide Nanofilm SnO 2 、WO 3 , ZnO, In 2 o 3 The emer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/14
Inventor 殷晨波朱斌张子立陶春旻董宁宁杨柳
Owner NANJING UNIV OF TECH
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