Terahertz pulse measurement-based burning temperature sensing device and method

A technology of terahertz pulse and combustion temperature, which is applied to measuring devices, thermometers with physical/chemical changes, thermometers, etc., can solve the problems of unable to track the temperature of the measurement response, unable to understand the real situation of the burning object, and the disturbance of the measured object, etc.

Active Publication Date: 2013-05-01
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, the contact measurement method will disturb the measured object, and its measurement response is often unable to track the rapidly changing temperature, and the sensitive components are easily polluted by high temperature or ...

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  • Terahertz pulse measurement-based burning temperature sensing device and method
  • Terahertz pulse measurement-based burning temperature sensing device and method
  • Terahertz pulse measurement-based burning temperature sensing device and method

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Embodiment Construction

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0062] like figure 1 As shown, the combustion temperature sensing device based on terahertz pulse measurement includes a femtosecond laser 1, a beam splitter 2, a first plane mirror 3-1, a second plane mirror 3-2, and a third plane mirror 3 -3. Focusing lens 4, photoconductive antenna type terahertz transmitter 5, off-axis parabolic mirror group 6, first half mirror 7-1, second half mirror 7-2, parallel grating group 8, plane Mirror 9, first polarizer 10-1, second polarizer 10-2, ITO glass 11, ZnTe crystal 12, CCD detector 13, computer 14, function generator 15, high frequency power amplifier 16, one-dimensional optics Translation stage17.

[0063] The laser is emitted from the femtosecond laser 1, and after being split by the beam splitter 2, it is divided into two paths: the reference laser and the detection laser, in which the detection laser passes thr...

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Abstract

The invention discloses a terahertz pulse measurement-based burning temperature sensing device and a terahertz pulse measurement-based burning temperature sensing method. Laser is emitted from a femtosecond laser device, and is divided into reference laser and detection laser through a beam splitter, the detection laser is focused on a photoconduction antenna type terahertz emitter, terahertz pulses emitted by the terahertz emitter are focused on a ZnTe crystal through an off-axis paraboloid lens group; and the reference layer is collimated and is coincident with terahertz waves focused on the ZnTe crystal after passing through a semi-transmission and self-reflection mirror, parallel grating groups and a polarizing film, the terahertz waves are modulated by using Pockels effect of the ZnTe crystal, and image signals corresponding to collected first reference layer carrying terahertz pulse strength information and second reference laser not carrying the terahertz pulse strength information are input into a computer by a CCD (Charge Coupling Device) detector for subsequence processing. According to the invention, the precision and speed of the non-contact combustion measurement method are increased, and the non-contact measurement of combustion object temperature and temperature distribution is realized.

Description

[0001] technical field [0002] The invention belongs to the technical field of combustion detection, and in particular relates to a combustion temperature sensing device and method based on terahertz pulse measurement. Background technique [0003] Combustion phenomena widely exist in many industries such as petrochemical, aerospace, metallurgy and electric power. In the process of combustion reaction, chemical energy is continuously converted into heat energy and electric energy, and heat transfer, mass transfer and chemical reaction process are continuously carried out at the same time. During the combustion process, gas products such as carbon dioxide, carbon monoxide, nitrogen oxides, sulfur dioxide and water vapor are produced and heat is released at the same time. In order to ensure the sustainable development of China's economy, the Chinese government and the scientific and technological circles have paid more attention to the research and application of energy e...

Claims

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Application Information

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IPC IPC(8): G01K11/30
Inventor 刘亦安王玲徐英邹绍芳吴开华
Owner HANGZHOU DIANZI UNIV
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