Inclined heating type semiconductor type gas sensor testing device and method

Abstract

The invention relates to an indirectly-heated semiconductor type gas sensor testing device and method, the indirectly-heated semiconductor type gas sensor testing device comprises a base, a fixed frame and a cavity, the two sides of the cavity are rotatably connected with the fixed frame through a horizontal connecting rod, and the fixed frame is rotatably connected with the base through a vertical connecting rod; the problem that the to-be-detected gas cannot be fully mixed due to the density when the to-be-detected gas is more than two kinds of mixed gas is solved, meanwhile, the mixing and shaking-up speed of the gas is increased, and the excessive loss of the gas-sensitive material is reduced. And meanwhile, the jackscrews are respectively arranged on the horizontal connecting rod and the vertical connecting rod, so that the limiting effect of the axial rotation of the cavity and the axial rotation of the fixed frame is realized. A plurality of gas input valves which are uniformly distributed are arranged at the top of the cavity, so that various gases to be detected can be connected; meanwhile, the liquid evaporation pond is arranged on the fixed platform, volatile liquid in the liquid evaporation pond is heated through the heating rod at the bottom of the liquid evaporation pond, gas is formed, and detection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of gas sensor detection, in particular to a testing device and method for a side-heating semiconductor gas sensor. Background technique [0002] With the rapid development of the chemical industry, the types of flammable, explosive, toxic and harmful gases are increasing. It is very important to know the content of the target gas in the air in time to avoid explosion and poisoning accidents. Therefore, various gas detectors are widely used in environmental monitoring. The core component of the gas detector is the gas sensor, which can be divided into catalytic combustion type, electrochemical type, semiconductor type, etc. according to the principle. The semiconductor gas sensor is based on metal oxide semiconductor. When the measured gas is adsorbed on the surface of the semiconductor, its electrical characteristics (such as conductivity) will change and generate relevant signals. The circuit converts thes...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a side-heating type semiconductor type gas sensor testing device and method, which solves the problem that the gas to be measured is two When more than one kind of mixed gas cannot be fully mixed due to the density, it also speeds up the mixing and shaking speed of the gas and reduces the excessive loss of gas-sensitive materials

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