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Gas concentration sensor

A gas concentration, sensor technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as low utilization of light energy and gas flow

Pending Publication Date: 2020-11-06
山东仁科测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned problems of low light energy utilization rate and gas flow caused by gas entering and exiting the gas chamber, the present invention provides a gas concentration sensor

Method used

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Embodiment Construction

[0037] as attached Figure 1-14As shown, the gas concentration sensor includes a gas chamber part 1, a light source and a lens part 2, a microphone 3, an opening and closing part 4 and a circuit board 5, and the light source and the lens part 2 are installed on one side of the gas chamber part 1, A microphone 3 is installed on the top of the air chamber part 1, and the air chamber part, a light source and a lens part, a microphone, and an opening and closing part 4 are installed on the described circuit board 5, and the described air chamber part 1 has a concave lens structure The concave lens wall 107 and the tension spring 106, the opening and closing part has a rotating plate 401 and an electromagnet 408, the opening and closing part is connected with the air chamber part through the rotating plate, and the concave lens wall 107 of the concave lens structure reflects light in the air chamber A full light area is formed, and the tension spring 106 and the electromagnet 408 a...

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Abstract

The invention relates to a gas concentration sensor which belongs to the field of gas sensors. The gas concentration sensor comprises an air chamber part, a light source and lens part, a microphone, an opening and closing part and a circuit board, the air chamber part is provided with a concave lens wall of a concave lens structure and a tension spring, the opening and closing part is provided with a rotating plate and an electromagnet, light reflected by the concave lens wall of the concave lens structure forms an all-optical area in the air chamber, and the tension spring and the electromagnet act on the rotating plate to enable the air chamber part to generate and cancel the closed air chamber. Airflow turbulence generated when gas is pumped into a common gas sensor can be avoided, noise caused by airflow turbulence is reduced, and the measurement precision is improved; an all-optical area can be formed in the closed air chamber, the utilization rate of light energy is increased, the active number of air molecules in the closed air chamber can be increased, and then the intensity of acoustic signals generated by the photoacoustic effect is improved; by arranging silica gel, theclosed air chamber can be formed in an auxiliary mode, the buffering effect can be achieved, and vibration caused by collision between the rotating plate and the air chamber body is avoided.

Description

technical field [0001] The invention relates to a gas concentration sensor, specifically uses photoacoustic spectrum technology to measure the concentration of a specific gas, and belongs to the field of gas sensors. Background technique [0002] Photoacoustic gas detection is realized by using the principle of photoacoustic conversion effect and weak signal detection technology. The main principle is: when a beam of specific monochromatic light with a fixed frequency When the wavelength of light is within the absorption range of the gas to be measured, it will be absorbed by the gas to be measured, and an acoustic wave with the same period as the modulation frequency is generated, that is, the photoacoustic effect. A microphone is used to convert the detected acoustic signal into an electrical signal that can be processed, and the concentration of the detected gas can be calculated by analyzing the detected electrical signal. [0003] Commonly used methods for detecting ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01N21/03
CPCG01N21/1702G01N21/0303G01N2021/1704
Inventor 杨垒张朝周在伟赵东鸣
Owner 山东仁科测控技术有限公司
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