Method for accurately measuring hydrogen sulfide gas concentration through detector
A technology for precise measurement and gas concentration, applied in the direction of measuring devices, color/spectral characteristic measurement, instruments, etc., can solve the problem of inaccurate measurement of hydrogen sulfide gas concentration, achieve the goal of eliminating interference factors, accurate measurement results, and ensuring accuracy Effect
Active Publication Date: 2018-11-23
HEILONGJIANG INST OF TECH
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[0004] The invention aims to solve the technical problem of inaccurate measurement of the existing hydrogen sulfide gas concentration
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[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0027] Such as figure 1 As shown, the present invention aims to solve the technical problem of inaccurate measurement of the existing hydrogen sulfide gas concentration. A method for accurately measuring the concentration of hydrogen sulfide gas with a dual-wavelength narrow pulse width is proposed, i...
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Abstract
The invention relates to a method for accurately measuring a hydrogen sulfide gas concentration in a dual-wavelength narrow-pulse-width mode. The method comprises the following steps: a beam of pump light enters a first resonant cavity to form first detection laser; the other beam of pump light enters a second resonant cavity to form second detection laser, the first detection laser and the seconddetection laser are directly transmitted into a sample tank (22); the first detection laser and the second detection laser are reflected for many times in the sample tank (22), are sent out of a light exiting opening (23) of the sample tank (22) and are converged to a detector (25) by an adjustable convergent lens (24); received optical signals are converted into electric signals by the detector(25) to be transmitted to a data acquisition card (26), a computer (27) can read data from the data acquisition card (26), and an accurate gas concentration value N can be obtained through analysis and calculation. According to the method disclosed by the invention, dual wavelengths are used for measurement and mutually serve as reference standards to perform pulse width correction; thus, accuratemeasurement results are obtained, and hydrogen sulfide gas detection under high accuracy is met.
Description
technical field [0001] The invention relates to a method for detecting the concentration of hydrogen sulfide gas, in particular to a method for accurately measuring the concentration of hydrogen sulfide gas with dual wavelengths and narrow pulse width. Background technique [0002] Industry and commerce usually require accurate measurement of harmful gases in a certain space to ensure the safety of this space. Currently, harmful gases that need to be protected include SO 2 、H 2 S, CO, etc. Whether the claimed hazardous gases meet certain purity limits and / or whether the emissions of these gases comply with environmental regulations. Typical applications such as process control, emissions and environmental monitoring, security, and air conditioning require accurate concentration measurement. [0003] Wavelength modulation spectroscopy is a way to enhance the sensitivity of gas measurements, especially when measuring smaller concentrations. Usually, the concentration of t...
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IPC IPC(8): G01N21/31
CPCG01N21/314
Inventor 李林军白云峰杨玉强周龙申英杰
Owner HEILONGJIANG INST OF TECH