Portable thermal radiation absorption spectrum methane detector

A technology of absorption spectrum and thermal radiation, applied in the field of portable thermal radiation absorption spectrum methane detectors, can solve the problems of slow response, difficult detection, unfavorable leaking orientation, etc., and achieve the effect of strong absorption signal

Pending Publication Date: 2020-08-07
WUHAN MIZI ENERGY SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a portable thermal radiation absorption spectroscopic methane detector, which solves the problem that the existing catalytic combustion cannot be detected until the measured gas enters the sensor, and it is difficult to detect in some spaces that are not easy to enter. , the response is slow, and it is a point detection, which is not conducive to determining the direction of the leak. Laser absorption spectroscopy is a methane detection instrument based on laser absorption spectroscopy, which requires a specific laser light source, expensive optical system and complex Spectral analysis algorithm, compared with catalytic combustion detectors, the price is very high

Method used

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  • Portable thermal radiation absorption spectrum methane detector
  • Portable thermal radiation absorption spectrum methane detector
  • Portable thermal radiation absorption spectrum methane detector

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Experimental program
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Embodiment 1

[0045] After the boot is ready, the measurement process is divided into two steps, which are respectively controlled by the two gears of the trigger 8. In the first step, the trigger 8 is pulled down to the first gear, and the thermal radiation on the surface of the measured object enters the detector and is projected to the thermopile 4. Trigger 8 When the first gear is pulled down, the band-pass filter lens 3 just turns to the position avoiding the optical path, and all the incident light can be projected onto the thermopile 4, and the signal intensity I at this time is recorded. 1 , the second step, continue to pull the trigger 8 to the second gear, due to the linkage of the rotating lens table 9, the band-pass filter lens 3 is driven to the optical path, when the trigger 8 is pulled down to the second gear, the band-pass filter lens 3 just turns around In the middle of the optical path, the incident light passes through the band-pass filter lens 3 vertically. Due to the ban...

Embodiment 2

[0047] The side of the cavity 2 can be installed with different types of laser emitters through buckles or other existing technologies, and the band-pass filter lens 3 can be replaced. In this embodiment, the laser emitter adopts the FRC650-060105-25 type. It is convenient for the user to judge the position of the measurement and make the field of view of the measurement more intuitive. Then the first gear of the trigger 8 is pulled, and the thermal radiation on the surface of the measurement object enters the detector and is projected to the thermopile 4. Record the moment The signal strength of I 1 , the second step, continue to pull the trigger 8 to the second gear, and test the signal I of the thermopile 2 Only the radiation intensity of the given wavelength part of the band-pass filter lens 3 is included, and then the first set of relevant data of the gas to be measured can be obtained through two sets of calculation formulas, and then a different band-pass filter lens 3 ...

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Abstract

The invention discloses a portable thermal radiation absorption spectrum methane detector. The detector comprises a handle. The top end of the handle is fixedly connected with a cavity. One side of the handle is rotationally connected with a trigger. The side face of the end, close to the handle, of the cavity is fixedly connected with a control panel. And the end, away from the handle, of the cavity is fixedly connected with a lens, the interior of the handle is fixedly connected with a battery, the side, close to the battery, of the interior of the handle is fixedly connected with a PCBA plate, and the top end of the PCBA plate and the top end of the battery both penetrate through the handle and are located in the cavity. The invention relates to the technical field of methane detectiondevices. According to the portable thermal radiation absorption spectrum methane detector, an uncooled infrared thermopile is used for replacing a photoelectric avalanche diode or a photomultiplier ofa laser spectroscopy method to serve as an optical probe. The cost is remarkably reduced, the selectivity of the absorption wavelength is realized through mechanical replacement of the band-pass filter, the tuning of the light source is avoided, and finally, an additional light source is not needed.

Description

technical field [0001] The invention relates to the technical field of methane detection devices, in particular to a portable thermal radiation absorption spectrum methane detector. Background technique [0002] Methane is the main component of various conventional and unconventional clean gases and many chemical process gases, and is widely used in industrial production and people's daily life. Since methane is a typical flammable and explosive gas, its inadvertent leakage may cause disastrous consequences, so the detection of methane leakage is of great significance. Methane is widely distributed in nature, and methane is the simplest organic compound. It can be used as a fuel and a raw material for the production of hydrogen, carbon black, carbon monoxide, acetylene, hydrocyanic acid and formaldehyde. Existing portable methane detectors mainly include diffusion detectors based on the principle of catalytic combustion and radar detectors based on the principle of laser ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/31G01N21/01
Inventor 胡雪蛟
Owner WUHAN MIZI ENERGY SCI & TECH CO LTD
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