Research And Implementation On Measurement System Of High Pulsed Magnetic Field

With the progress of science and technology, High Pulsed Magnetic Field (HPMF) becomes one of the most important tools for many scientific researches. Aiming at development of HPMF experiment, a precise,stable and reliable measurement system is required, controlling the discharging process and acquiring the parameters of HPMF. Because of low costs,simple principle,wide measure range and rapid response, the measurement system based on the principle of electromagnetic induction Faraday's Law is widely applied in the area of measurement on HMPF.This paper is a comprehensive study on the implementation of HMPF measurement system, from the characteristics and locale of HMPF experiment. The main contents of the study are depicted as followed:Structure as well as material of pick-up coil are analyzed and designed. Considering the characteristics of HMPF, the multi-probe is designed to be with small temperature coefficient and steady properties. Also, it could be easily integrated with temperature sensor. On this condition, different methods about calibration of pick-up coil are discussed and compared. Transmitting,recording and disposing process of pick-up signal is investigated, and a preliminary data process program(Pulsed Magnetic Field Data Processor) is developed using Visual Basic 6.0, and the performance is tested and evaluated as well. By the researches of discharging environment, the electromagnetic interference and grounding protection of the measurement system are analyzed and designed. Meanwhile, the influence to the central field brought with the shielding bushing is discussed.A pulsed magnetic field simulator to examine the measurement system is developed, which is easily established and reset compared with HPMF. Based on the theory of HMPF and its discharging process, a target field with peak value of 1T is implemented.Finally, field-experiment and simulated experiment are both carried out. By analyzing the results, the errors occurred are analyzed in primary. The experimental results have indicated that the system could be used for measuring High Pulsed Magnetic Fields.