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Real-time temperature monitoring instrument for tunable semiconductor laser absorption spectrum

A laser absorption spectrum and real-time monitor technology, applied in absorption/scintillation/reflection spectroscopy, thermometers, thermometers with physical/chemical changes, etc., can solve complex optical structures, high light source power requirements, unsuitable for industrial applications, etc. problem, to achieve high resolution and eliminate the interference of low-frequency noise

Active Publication Date: 2011-09-14
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

CRRS and PLIF methods have relatively high measurement accuracy, but their optical structures are complex, signal adjustment and processing are difficult, and light source power requirements are high, so they are not suitable for practical industrial environment applications

Method used

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  • Real-time temperature monitoring instrument for tunable semiconductor laser absorption spectrum
  • Real-time temperature monitoring instrument for tunable semiconductor laser absorption spectrum
  • Real-time temperature monitoring instrument for tunable semiconductor laser absorption spectrum

Examples

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Embodiment Construction

[0022] Such as figure 1shown. The tunable semiconductor laser absorption spectrum temperature real-time monitor includes a cabinet 2, a red laser 6 and a DFB laser 7 are arranged in the cabinet 2, and an optical beam combiner 8 for combining the outgoing lights of the red laser 6 and the DFB laser 7, The cabinet 2 is also provided with a signal generation module 16, and a laser temperature and current control module 5 and a lock-in amplifier 15 that are electrically connected to the signal generation module 16 respectively. Connection, the output end of the signal generation module 16 is electrically connected with the input end of the laser temperature and current control module 5 and the input end of the lock-in amplifier 15 respectively, and the FC connected with the optical beam combiner 8 light outlets through the optical fiber is installed on the cabinet 2 case walls / PC flange 10, the photodetector 9 that the output end is electrically connected with the input end of t...

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Abstract

The invention discloses a temperature monitoring instrument for a tunable semiconductor laser absorption spectrum. Infrared laser beams penetrate through a zone to be temperature-measured, and the temperature of a measured zone is obtained in real time by utilizing a characteristic absorption spectrum of water vapor in the zone. Laser is transmitted and emitted through singlemode fibers, penetrates through the zone to be temperature-measured after being subjected to collimation and beam expansion, and is then received and coupled to multimode fibers; and the coupled laser is received by a photoelectric detector and converted to electric signals, and temperature is obtained by acquisition processing and inversion.

Description

technical field [0001] The invention relates to the field of temperature monitoring instruments, in particular to a tunable semiconductor laser absorption spectrum temperature real-time monitor suitable for combustion site environment. Background technique [0002] Temperature is one of the most important parameters to measure combustion efficiency. The measurement of temperature occupies an extremely important position in the fields of combustion efficiency optimization of industrial combustion boilers, exhaust emission control, and engine combustion state diagnosis and control. In recent years, my country has done a lot of transformation work on burners to improve the combustion situation, but the combustion monitoring technology is still a relatively backward link. The monitoring of combustion status and the establishment and verification of new combustion models urgently require corresponding technical means to provide real-time and accurate measurements of parameters su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01J3/42
Inventor 刘文清许振宇张亮刘建国阚瑞峰张玉钧
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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