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Optical fiber multi-parameter detector for gas power generation

A multi-parameter, detector technology, applied in the direction of color/spectral characteristic measurement, instruments, measurement devices, etc., can solve the problem of no temperature correction, and achieve the effect of avoiding measurement errors, improving safety performance, and simplifying structure

Inactive Publication Date: 2011-10-26
济宁安然智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the influence of temperature on gas detection cannot be ignored, but all the current optical detection instruments are not corrected according to the temperature of the gas

Method used

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  • Optical fiber multi-parameter detector for gas power generation
  • Optical fiber multi-parameter detector for gas power generation
  • Optical fiber multi-parameter detector for gas power generation

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Embodiment Construction

[0016] Such as figure 1 Shown is the system structure diagram. The light source driving circuit 1 drives 3 DFB semiconductor lasers (2, 3, 4). In this system, in order to detect the gas concentration, oxygen concentration and humidity (water vapor concentration), the central wavelength is used to correspond to a certain characteristic absorption peak of these three gases. position of the DFB semiconductor laser, the absorption peaks of the three gases are as follows Figure 4 , Figure 5 , Figure 6 shown. The signal output by the drive circuit 1 is as figure 2 Shown is a sawtooth wave that allows the laser to completely sweep out an absorption peak of the gas.

[0017] The light emitted by the laser enters the probe 7 through the optical switch 5 and the optical cable 6, and the structure of the absorption cavity contained in the probe 7 is as follows: Figure 10 As shown, it consists of an incident-end fiber collimator 12 , an exit-end fiber collimator 13 , a fiber g...

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Abstract

The invention relates to an optical fiber multi-parameter detector for gas power generation, which is characterized by comprising a light source sawtooth wave drive circuit and a DFB semiconductor laser in which at least one path of central wavelength corresponds to an air absorption peak, wherein the light source sawtooth wave drive circuit is electrically connected with the DFB semiconductor laser, and an optical switch is arranged on an optical path between the DFB semiconductor laser and a probe; a photodetector is matched with the probe, and the DFB semiconductor laser, the optical switch, the probe and the photodetector are connected by optical cables, and the photodetector is electrically connected with a single chip microcomputer; and the optical switch is electrically connected with the single chip microcomputer through an optical switch control line. The invention is mainly used for detection of gas.

Description

technical field [0001] The patent of the present invention relates to a multi-parameter detection system using gas power generation, which can realize simultaneous online safety detection of multiple parameters such as gas concentration, oxygen concentration, humidity, and temperature by using wavelength division multiplexing technology. Background technique [0002] my country is a big country of coal production, and mines with gas outburst account for about half of coal mines. Gas is the biggest threat to coal mine safety, and more than 70% of major coal mine safety accidents in the country are related to gas explosions. The methane content in the gas is very high, and the greenhouse effect of methane accounts for 15% of global warming, second only to carbon dioxide; moreover, the greenhouse effect caused by the same amount of methane is 21 times that of carbon dioxide. According to data released by the National Development and Reform Commission, the utilization rate of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01K11/32G01K11/3206
Inventor 赵燕杰王昌倪家升魏玉宾李艳芳王黔尚盈张婷婷
Owner 济宁安然智能科技有限公司
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