Infrared gas sensor with piezoelectric micropump and turbulent flow structure

A technology of gas sensors and infrared detectors, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of insufficient response speed and accuracy of infrared respiratory gas sensors, and achieve the effect of increasing the diffusion speed

Inactive Publication Date: 2019-05-28
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] Based on the above problems, in order to solve the problem of insufficient response speed and accuracy of the existing infrared respiratory gas sensor in a dynamic environment, the present invention provides an infrared gas sensor with a piezoelectric micropump and a flow disturbance structure

Method used

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  • Infrared gas sensor with piezoelectric micropump and turbulent flow structure
  • Infrared gas sensor with piezoelectric micropump and turbulent flow structure
  • Infrared gas sensor with piezoelectric micropump and turbulent flow structure

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the components of the entire infrared gas sensor include piezoelectric micropump 1, spoiler 2, cross gas chamber 3, sensitive source fixed structure 4, infrared sensitive element 5, light source fixed structure 6, infrared light source 7 and Fully transparent infrared glass8.

[0024] Two cylinder-shaped cavities were dug out longitudinally and transversely from the cuboid metal block made of aluminum alloy by machining, and the inner diameters were 9mm and 2mm respectively. The cavity with an inner diameter of 9mm will be used as an air chamber, and the cavity with an inner diameter of 2mm will be the air inlet and outlet. Cut out a cuboid cavity of 1mm*9mm*10mm at the 1mm section of the 9mm cavity close to the air inlet direction to place the spoiler.

[0025] Make spoiler 2 using laser cutting like ima...

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Abstract

The invention belongs to the field of gas sensors, and particularly relates to an infrared gas sensor with a piezoelectric micropump and a turbulent flow structure. The infrared gas sensor is specially suitable for dynamic respiratory gas detection. According to the infrared gas sensor, firstly, through the piezoelectric micropump, tested gas is rectified to solve the problem that the tested gas generates turbulent flow when entering a gas inlet hole; secondly, through the cooperation of the turbulent flow structure arranged in a gas chamber, the tested gas entering the gas chamber is uniformly diffused to avoid the condition that the effective available optical distance of the infrared gas sensor is shortened since inhomogeneous gas flow columns are formed when the tested gas enters the gas chamber and increase the diffusion speed of the gas inside the gas chamber. Compared with existing infrared gas sensors, the infrared gas sensor has the advantages of being more efficient and precise.

Description

technical field [0001] The invention belongs to the field of gas sensors, in particular to an infrared gas sensor with a piezoelectric micropump and a flow-disturbing structure, and is especially suitable for dynamic gas detection. Background technique [0002] Gas sensors are widely used in production, environmental testing, and medical and health fields. Especially under the background of the rapid development of the Internet of Things industry, the demand for sensors has been greatly increased. With the improvement of people's living standards, people pay more attention to air quality and health, and the application demand of gas sensors is growing rapidly. Gas sensors mainly include electrochemical type, catalytic combustion type and semiconductor type, etc., but these types of sensors are mostly used for industrial or indoor gas concentration detection. As for the detection of human breathing gas, especially the detection of carbon dioxide, this dynamic gas exchange pr...

Claims

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Application Information

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IPC IPC(8): G01N21/3504G01N21/01
Inventor 罗文博袁博张开盛帅垚吴传贵张万里
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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