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Non-dispersive infrared light gas detection system

A gas detection system and infrared light technology, which is applied in the field of non-separation infrared light gas sensors, can solve the problems of low detection accuracy, poor stability, and poor real-time performance, and achieve the effects of high precision, small drift, and improved detection accuracy

Inactive Publication Date: 2014-03-26
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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AI Technical Summary

Problems solved by technology

At present, non-spectral infrared gas detection has been developed rapidly at home and abroad, and has been widely used, but most gas detection uses motor-mechanical modulation of infrared light, and motor-mechanical modulation of infrared light detection instruments has various defects, such as: high power consumption , poor stability, low detection accuracy, poor real-time performance during continuous monitoring of harmful gases, etc.

Method used

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Embodiment Construction

[0027] figure 1 It is a schematic diagram of the structure of the sampling gas chamber of the non-separation infrared light gas detection system of the present invention. In the figure, the electrical modulation signal and infrared light source provide infrared light of a single wavelength for gas detection; the inner wall of the coated gas chamber is made of gold-plated quartz glass tube material, which minimizes the loss of infrared light during propagation and increases corrosion resistance; The upper and lower air holes realize the circulation of the detection gas in the coating gas chamber; the infrared light passes through the filter to reach the infrared detector, and the infrared detector realizes the detection of the infrared light intensity after the gas absorption, and outputs the corresponding voltage according to the light intensity Signal.

[0028] figure 2 It is a diagram of the working principle of the non-separation infrared light gas detection system of th...

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Abstract

The invention discloses a non-dispersive infrared light gas detection system adopting an electric pulse infrared light modulation method, so as to reduce power consumption at the part where infrared light is modulated, and stability is improved; an internal coating method is adopted in structural design of a gas chamber, so that infrared light diffusion and external disturbance are reduced further, and gas detection accuracy is improved; a calibrating circuit is used for signal processing, so that different collected gas can be detected accurately through calibration; a programmable logic device is adopted to calibrate different environmental factors in air through software collection, the functions of data teletransmission, abnormity warning and the like are achieved through FPGA treatment, thereby improving module detection precision, timeliness and stability and reducing system cost simultaneously. The non-dispersive gas detection system disclosed by the invention has the advantages that the system is small in volume and low in power consumption, continuity and timeliness of gas detection can be achieved, and the detection precision is improved greatly.

Description

technical field [0001] The invention belongs to the field of non-separation infrared light gas sensors, in particular to a non-separation infrared light gas detection system. Background technique [0002] With the improvement of people's awareness of environmental health and safety, the requirements for continuous monitoring of air environmental quality have been further increased. At present, non-spectral infrared gas detection has been developed rapidly at home and abroad, and has been widely used, but most gas detection uses motor-mechanical modulation of infrared light, and motor-mechanical modulation of infrared light detection instruments has various defects, such as: high power consumption , poor stability, low detection accuracy, and poor real-time performance during continuous monitoring of harmful gases. Contents of the invention [0003] In order to solve the above problems, the present invention provides a non-separation infrared light gas detection system, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
Inventor 张化良龚飞郭照峰刘志军韩全唐学术张志杨增顺卢蕴哲靳京峰
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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