In-Situ Laser Gas Analyzer with Online Deviation Device

A technology of laser gas and deviation correction device, which is applied in the direction of material analysis, measurement device, and material analysis by optical means, which can solve the problems of time-consuming and laborious, reduced measurement accuracy, and inability to perform measurement.

Active Publication Date: 2020-08-04
HANGZHOU CHUNLAI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the laser output wavelength drifts out of a certain range, the measurement accuracy of the product will be reduced, or even the measurement cannot be performed
[0003] For the in-situ laser gas analyzer, when the second harmonic drifts out of the sampling signal range, if you want to find the second harmonic signal of the measured gas, you need to remove the receiving unit and the transmitting unit from both sides of the chimney pipe, and install it on the calibration Re-introduce the standard gas into the gas chamber to find the second harmonic, which is time-consuming and labor-intensive

Method used

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  • In-Situ Laser Gas Analyzer with Online Deviation Device
  • In-Situ Laser Gas Analyzer with Online Deviation Device
  • In-Situ Laser Gas Analyzer with Online Deviation Device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] refer to Figure 1-Figure 4 As shown, an in-situ laser gas analyzer with an online deviation correction device includes a transmitting unit 101, a receiving unit 104, a transmitting unit connecting part 102, a receiving unit connecting part 103 and a purging unit 105, the transmitting unit 101 and the receiving unit 104 are respectively installed on the process gas pipeline through the transmitting unit connector 102 and the receiving unit connector 103, and the transmitting unit 101 and the receiving unit 104 are connected by a transmitting and receiving cable, and both the transmitting unit connecting part 102 and the receiving unit connecting part 103 include welding method Blue, root valve and instrument flange, the transmitter unit 101 contains a laser module, a laser driver circuit board and a laser temperature control board, a lens and a protection window...

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Abstract

The invention relates to an in-situ laser gas analyzer with an on-line deviation correction device. The in-situ laser gas analyzer comprises a transmitting unit, a receiving unit, a transmitting unit connecting piece, a receiving unit connecting piece and a purging unit; the receiving unit comprises the automatic deviation correction device; the purging unit is provided with a shell with a rainproof function, and a voltage stabilizing and flow controlling device is arranged in the shell; the automatic deviation correction device comprises a receiving installation seat, a lens device, a synchronous motor, a sensor module and a reference gas chamber, the synchronous motor achieves automatic switching of the reference gas chamber in an optical path through software controlling, second harmonic gas can be detected by the laser gas analyzer when the reference gas chamber is sealed, and then the deviation effect is achieved. The laser gas analyzer is simple in structure and high in reliability, and the condition that on a user site, the second harmonic gas is found, and standard gas is introduced is avoided.

Description

technical field [0001] The invention relates to a laser gas analyzer, in particular to an in-situ laser gas analyzer with an online deviation correction device. Background technique [0002] The laser gas analyzer uses tunable semiconductor laser absorption spectroscopy (TDLAS) technology for gas concentration detection, and the laser output wavelength is related to the operating current and operating temperature. In actual field application, in some occasions the content of the gas to be measured is low, and the second harmonic is not in the state of correction. When the ambient temperature changes greatly or the hardware drifts under long-term use, the output wavelength of the laser changes. When the laser output wavelength drifts out of a certain range, the measurement accuracy of the product will be reduced, or even cannot be measured. [0003] For the in-situ laser gas analyzer, when the second harmonic drifts out of the sampling signal range, if you want to find the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/39G01N21/01
CPCG01N21/01G01N21/39
Inventor 刘立富温作乐于志伟
Owner HANGZHOU CHUNLAI TECH
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