基于鐵磁性的快速測溫方法研究及系統(tǒng)設(shè)計(jì)
[Abstract]:Based on the saturation magnetization temperature curve of ferromagnetic materials, the method of fast non-contact temperature measurement is studied in this paper, and a complete experimental platform is designed. When ferromagnetic material reaches saturation state in DC magnetic field, the saturation magnetization of ferromagnetic material is linearly related to temperature. The temperature information can be obtained by detecting the magnetic field around ferromagnetic material. The method has a good application prospect in the fields of thermal theory, laser medical treatment, material processing, military industry and so on. Firstly, based on the magnetic properties of matter, the Langevin function model of superparamagnetic temperature measurement is introduced, and the characteristics and advantages of ferromagnetic materials compared with superparamagnetic nanoparticles in transient temperature measurement are pointed out. The temperature model of saturation magnetization of ferromagnetic materials is analyzed. On the basis of this, the specific measurement method applied to fast temperature measurement is put forward. Then, based on the self-proposed temperature measurement method, a rapid temperature measurement experimental platform is built, including the pulse laser that generates transient heat source, the Ni film of the heat sensitive element, the magnetic detection coil, the signal conditioning circuit module, the isolation platform and the shield tube. Data acquisition module and so on. A software system of intelligent acquisition, signal processing, temperature inversion and storage optimization is designed by using Labview. Finally, by comparing the fast thermocouple with the optical measuring equipment, the experiment is carried out on the rapid temperature measurement platform. The results show that the thermal response time of the fast temperature measuring system is much better than that of the thermocouple, and the temperature response measurement of microsecond level can be realized.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TK311
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