The Research And Design Of The Local Measurement And Control System Of Pulsed High Magnetic Field Facility

Pulsed High Magnetic Field is the one of the most important extreme condition in modern scientific experiments, which can provide an important platform of scientific experiments for physics, chemistry, biology and many other areas of the basic theory. Recently, with the development of pulse magnet technology, pulsed high magnetic fields have raised scientists' attention increasingly, because of the increment in the fundamental research, such as condensed state physics, materials science, and biomedicine. Based on the platform of the National Large Scale Scientific Research Facility - Pulsed High Magnetic Field Facility in Huazhong University of Science and Technology, we research and design the local measurement and control system of pulsed high magnetic field device, analysis how to measure pulsed high magnetic field and pulsed high current, and Achieve design and installation of local measurement and control system. The thesis mainly contains following contents:First of all, the significance of the building pulsed high magnetic field devices is introduced. An overview of the development of pulsed high magnetic field at home and abroad is given. Several methods of measuring pulsed high magnetic field and pulsed high current and an analysis of the realization of several switch control program are given.Secondly, the main structure of pulsed high magnetic field is described, its measurement and control system are discussed in detail.Thirdly, the local measurement system is described in detail. The measurement method of pulsed magnetic fields using the Faraday law of electromagnetic is studied. The method of using Rogowski coils and Hall current sensor to measure pulsed high current is analyzed and compared.Fourthly, the local control system is designed and realized. The components of local control system including DSP2812 CPU module, RS-232 to optical signal conversion and corresponding interfacing parts are presented.Finally, the main sources of EMI are introduced. Several anti-jamming measures such as shielding, optical-electrical isolation, over-voltage protection and software interlocking an so on are given.