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System and method for dynamically demarcating film thermocouple by adopting laser

A dynamic calibration and laser technology, applied to instruments, scientific instruments, measuring heat, etc., can solve the problem that it is difficult to obtain the pulse width of the laser excitation signal, and achieve the effect of strong practicability, high precision, and easy operation

Active Publication Date: 2010-10-13
DALIAN JIAOTONG UNIVERSITY
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AI Technical Summary

Problems solved by technology

It is difficult to obtain the pulse width of the laser excitation signal that matches the microsecond response time of the thin-film thermocouple by using the above method

Method used

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  • System and method for dynamically demarcating film thermocouple by adopting laser
  • System and method for dynamically demarcating film thermocouple by adopting laser
  • System and method for dynamically demarcating film thermocouple by adopting laser

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 As shown, a system for dynamic calibration of thin-film thermocouples using lasers, including laser test bench target frame 2, continuous He-Ne laser 3, lens group 4, precision amplifier 8, DT9800 dynamic signal acquisition instrument 9, computer 10 and Test software, the laser light emitted by the continuous He-Ne laser 3 is irradiated to the thin-film thermocouple 1 installed on the target frame 2 of the laser test bench through the lens group 4, and the thin-film thermocouple 1 is sequentially connected with the precision amplifier through the data cable 8, DT9800 dynamic signal acquisition instrument 9 is connected with computer 10, and described test software is installed in computer 10, and described system also includes laser control power supply 5, Ultra-CFR short pulse laser 6 and frequency doubling crystal 7, described The laser control power...

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Abstract

The invention discloses a system and a method for dynamically demarcating a film thermocouple by adopting a laser. The system comprises a laser test-bed frame, a continuous He-Ne laser, a lens group, a precise amplifier, a dynamic signal acquisition instrument, a computer, testing software, a laser control power supply, an Ultra-CFR short-pulse laser and a frequency doubling crystal. The laser control power supply is connected with the Ultra-CFR short-pulse laser through an electric power cable, and laser emitted by the Ultra-CFR short-pulse laser irradiates the film thermocouple on the laser test-bed frame through the frequency doubling crystal. In the invention, the Ultra-CRF short-pulse laser with the pulse width of 8ns is adopted as an excitation heat source to carry out the dynamic demarcation of the film thermocouple, and the experiment result shows that the least response time of the film thermocouple can reach 0.042 ms, thereby the dynamic demarcation of the film thermocouple with microsecond response time can be realized.

Description

technical field [0001] The invention relates to a calibration method of a transient temperature sensor, in particular to a system and a method for dynamic calibration of a thin-film thermocouple by using a laser. Background technique [0002] In high-speed cutting, the measurement of the transient cutting temperature in the cutting zone is a very critical factor. It is very necessary to monitor and accurately reflect the temperature change of the cutting zone during the cutting process in real time. Thin film thermocouple is an advanced sensor for measuring transient temperature, and its measurement principle is the same as that of ordinary thermocouple. The dynamic characteristics or dynamic response capabilities of thin film thermocouples are often expressed by the time constant τ. There are three commonly used methods for traditional thermocouple dynamic calibration: step response method, impulse response method and ramp signal method. These methods regard the dynamic ...

Claims

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Application Information

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IPC IPC(8): G01K15/00
Inventor 崔云先杨德顺贾颖王亚楠
Owner DALIAN JIAOTONG UNIVERSITY
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