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tdlas gas temperature measurement and detection device based on optical spectroscopic system

A spectroscopic system and detection device technology, applied in the field of optical detection, can solve the problems of low index, low accuracy and small measurement range of mechanical temperature measurement equipment

Active Publication Date: 2017-04-12
THE 3RD ACAD 8358TH RES INST OF CASC
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Problems solved by technology

The original mechanical temperature measurement equipment has low indicators, low accuracy, and small measurement range, which can no longer meet the requirements of industrialized high-temperature operations.
As for the photoelectric detection technology, its laser detection accuracy is high, the error is small, the system is easy to set up, easy to operate, and can basically meet the detection needs of industrial production. However, there is still no relatively mature technical solution for TDLAS gas temperature measurement and detection.

Method used

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  • tdlas gas temperature measurement and detection device based on optical spectroscopic system

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Embodiment

[0060] In this example, if figure 1 As shown, the laser, laser driver, laser signal generator, and laser signal modulator are correctly connected to each other and connected to the power line, the single-mode fiber is connected to the two lasers, and the fiber combiner is connected to the two single-mode fibers. One laser beam is synthesized by one laser beam. The synthesized fiber laser beam is connected with the fiber collimator to emit the beam, and the first plano-convex lens is placed after the flame of the gas to be measured is burned. The center position of the lens is consistent with the center position of the fiber collimator (coaxial) and fixed, and the fiber grating surface is placed At the focal length position of the rear end of the first plano-convex lens, two plano-convex lenses, namely the second plano-convex lens and the third plano-convex lens, are respectively placed on the center of the optical axis of the laser beams with different wavelengths separated by...

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Abstract

The invention belongs to the technical field of optical detection, and in particular relates to a TDLAS gas temperature measurement and detection device based on an optical spectroscopic system. The scheme adopts a high-energy semiconductor tunable laser as the working light source. The laser can detect the specific fluctuations with variable frequency, and the detection range is accurate and wide. After the parallel light is emitted by the fiber collimator, the beam passing through the combustion field is gathered by the lens, and the optical grating is used to split the light. The system performs precise light splitting. This scheme refracts and focuses the split laser beam through the lens, which can improve the focusing energy of the optical signal, and then detect the temperature of the gas in the combustion flame field to be measured. Among them, after the grating splits the wavelength, it has better singleness of wavelength, and the focus energy of the image spot is stronger. After the splitting, the optical signal energy is not lost after the second focusing. Suitable for industrial production testing.

Description

technical field [0001] The invention belongs to the technical field of optical detection, and in particular relates to a TDLAS gas temperature measurement and detection device based on an optical spectroscopic system. Background technique [0002] With the development of science and the advancement of science and technology, the product detection technology in the social production process has been continuously improved, and the original mechanical detection method has gradually advanced to the detection method of photoelectric technology. Among them, gas detection is the most forward-looking and market-leading at present. Value-added detection means, real-time monitoring and measurement of temperature and content in gas combustion, mainly used in industrial miniaturization production, temperature detection of engineering equipment, such as steel plants, incineration plants, boiler plants, etc. The original mechanical temperature measurement equipment has low indicators, low...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 李鑫周涛贾晓东
Owner THE 3RD ACAD 8358TH RES INST OF CASC
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