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Sensor for particulate matter concentration detection

A technology for detecting the concentration of sensors and particulate matter, applied in the field of photoelectric sensors, can solve the problems of low detection accuracy of PM2.5, low sensitivity of photoelectric elements, affecting the photoelectric conversion process, etc., to achieve reliability and stability, high sensitivity, and improved The effect of detection accuracy

Inactive Publication Date: 2014-03-26
NANTONG UNIVERSITY
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Problems solved by technology

[0002] At present, photoelectric sensors have been applied to the detection of PM2.5. The brightness of the light source selected by ordinary photoelectric sensors is relatively low, and the sensitivity of photoelectric elements is also relatively low. Due to the fine characteristics of PM2.5, the light intensity detected by the conditioning circuit changes slightly. , affecting the photoelectric conversion process, so the detection accuracy of PM2.5 is not high

Method used

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  • Sensor for particulate matter concentration detection
  • Sensor for particulate matter concentration detection
  • Sensor for particulate matter concentration detection

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] figure 1 A particle concentration detection sensor according to an embodiment of the present invention is schematically shown.

[0021] Such as figure 1 As shown, the particle concentration detection sensor includes a semiconductor laser 1, an avalanche photodiode 2 and a photoelectric signal conditioning circuit 3, and the avalanche photodiode 2 is connected to the photoelectric signal conditioning circuit 3, so that a detection channel is formed between the semiconductor laser 1 and the avalanche photodiode 2 4.

[0022] A first convex lens 5, a second convex lens 6 and a third convex lens 7 are arranged between the semiconductor laser 1 and the avalanche photodiode 2 from left to right, the first convex lens 5 and the second convex lens 6 are located on one side of the detection channel 4, and the third The convex lens 7 is located on the other s...

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Abstract

The invention discloses a sensor for particulate matter concentration detection. The sensor comprises a semiconductor laser unit, an avalanche photodiode and an optoelectronic signal conditioning circuit, wherein the avalanche photodiode is connected with the optoelectronic signal conditioning circuit to form a detection channel between the semiconductor laser unit and the avalanche photodiode. The sensor is simple in structure and low in cost, has the advantages of precision in measurement, quickness in response, small error, high sensitivity, and good stability, can detect the concentration of PM 2.5 precisely, and effectively improves the detecting precision.

Description

technical field [0001] The invention relates to a sensor for detecting the concentration of particulate matter in the atmosphere, in particular to a photoelectric sensor for detecting PM2.5. Background technique [0002] At present, photoelectric sensors have been applied to the detection of PM2.5. The brightness of the light source selected by ordinary photoelectric sensors is relatively low, and the sensitivity of photoelectric elements is also relatively low. Due to the fine characteristics of PM2.5, the light intensity detected by the conditioning circuit changes slightly. , which affects the photoelectric conversion process, so the detection accuracy of PM2.5 is not high. Contents of the invention [0003] The purpose of the present invention is to provide a particle concentration detection sensor to improve the detection accuracy of PM2.5. [0004] According to one aspect of the present invention, a particle concentration detection sensor is provided, including a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 杨永杰申红民许鹏杨赛程张裕胜杨北平陈培
Owner NANTONG UNIVERSITY
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