Gas sensor testing device and testing method

Abstract

The invention discloses a gas sensor testing device and a testing method. The testing device comprises a gas distributing device, a gas supply device and a signal collection device, wherein the gas distributing device is used for distributing and providing gas for testing; the gas supply device is used for distributing tested gas and comprises a gas inlet plate and a gas outlet plate; the gas inlet plate and the gas outlet plate are connected into a whole body in a sealed way, so that a cavity is formed in the interior between the gas inlet plate and the gas outlet plate; the gas inlet plate is provided with a gas inlet used for being communicated with the cavity and the air distributing device; the gas outlet plate is provided with a plurality of gas outlets used for being communicated the cavity and an inlet of a gas sensor; the signal collection device is used for collecting inductive signals of the gas sensor. The testing device can realize rapid testing and batch detecting of the gas sensor, and saves the gas for testing.

Description

technical field [0001] The invention relates to the technical field of gas sensor testing, and more particularly, to a gas sensor testing device and a gas sensor testing method. Background technique [0002] Gas sensors are used to detect the type of gas or measure the concentration of gas. The test accuracy of the gas sensor is a crucial indicator. Factory testing of gas sensors is a critical process. [0003] At present, the gas sensor test is generally completed in the gas sensor test box (or test box). During the test, the gas sensor needs to be placed in the test box, the entire test box is filled with the target gas, and the gas sensor is placed in the target gas atmosphere to complete the test. The entire process is almost entirely done manually. There are the following problems in this test method: one is waste of gas, the amount of the target gas detected by the gas sensor is very small, and there is no need for a full box of target gas, but the test needs to fi...

AI Technical Summary

Problems solved by technology

There are the following problems in this test method: the one is waste of gas, the amount of target gas detected by the gas sensor is very small, and there is no need for a full box of target gas, but the test needs to fill the box with the target gas; the other is waste Time, to make the test box full of a certain concentration of target gas, the air or other gases in the test box must be replaced cleanly, the replacement process takes a long time, and the test efficiency is low; the third is the tightness of the test box by this test method The requirements are high, otherwise it will be difficult to ensure the precise concentration of the target gas if there is a leak

Using this method for testing is very unfavorable for measuring important parameters such as response time and repeatability of gas sensors, and it is difficult to meet the requirements of large shipments

[0004] Additionally, most procedures require manual

For the measurement of high concentrations of toxic, harmful or explosive gases, this test method has potential hazards to personal safety

Images