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A high-accuracy detection device and correction method based on tdlas technology

A temperature control device and technology, applied in the field of gas sensing, can solve the problems of high power consumption and inaccurate measurement, and achieve the effect of reducing power consumption

Active Publication Date: 2022-08-09
JILIN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of excessive power consumption caused by measurement under constant temperature and constant pressure conditions and inaccurate measurement under conditions of temperature changes when the TDLAS technology detection system is used for field measurement in the prior art. High-accuracy detection device and correction method of TDLAS technology

Method used

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  • A high-accuracy detection device and correction method based on tdlas technology
  • A high-accuracy detection device and correction method based on tdlas technology
  • A high-accuracy detection device and correction method based on tdlas technology

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Embodiment 1

[0071] Using the proposed multi-component gas detection device, the standard gas (299.4ppmv CH 4 , 560.8ppmv CO 2 ) as an example (the design and calibration temperature of the instrument is 25 ° C, the initial light intensity of methane is 200 mV, and the carbon dioxide is 120 mV), and the realization of a multi-component gas detection device based on TDLAS technology and the background correction method proposed by the present invention is described. Process, including the following steps, and the following steps are performed in sequence:

[0072] Step 1: use the temperature sensor to measure the ambient temperature to be 30°C, set the target temperature of the external temperature control device 19 to 31°C according to the ambient temperature, and set the target temperature of the multi-pass cell temperature control device 7 to 32°C;

[0073] Step 2: After the temperature is stable, open the proportional valve 1 of the inlet port, the proportional valve 2 of the outlet po...

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Abstract

The present invention is a high-accuracy detection device and correction method based on TDLAS technology, belonging to the technical field of gas sensing. Computer, signal generator, CO 2 Laser driver, CO 2 Laser temperature control, CH 4 Laser driver, CH 4 Laser temperature control, CH 4 Laser, CO 2 Lasers, fiber couplers, and external temperature controls detect gas components and their concentrations, and provide a background correction method to improve measurement accuracy. The invention utilizes the adaptive temperature control device to provide a stable measurement environment for the device in different environments, and at the same time, reduces the power consumption of the device, and utilizes the background correction method to improve the measurement accuracy and enable the detection device to operate in a wide temperature range environment. Achieve high-accuracy measurement.

Description

technical field [0001] The invention belongs to the technical field of gas sensing, and in particular relates to a multi-component gas detection device and a background correction method based on TDLAS technology. Background technique [0002] Gas geochemical detection is an effective means of earthquake early warning and geological analysis. The gas in the deep earth contains a lot of geological information. The dynamic information of the deep crustal structure can be detected by using the fault gas flow channel. The gas has the characteristics of strong mobility and wide flow range. Accurate concentration monitoring is an effective means of earthquake early warning, especially for the in-situ detection of multi-component geochemical gases. [0003] Tunable diode laser absorption spectroscopy has been successfully used in industrial analysis, environmental monitoring and medical diagnosis due to its high sensitivity, strong environmental adaptability and fast response. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/39
CPCG01N21/01G01N21/39
Inventor 陈晨王鹏王言章程德福朴亨姜炎坤李恒宽
Owner JILIN UNIV
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