| Magnetic resonance coupled radio power transfer technology is the forefront issue in the field of power transfer. In order to promote the application of magnetic resonance coupled radio power transfer technology, it is urgently need to improve the transmission distance and transmission efficiency problems. Many studies that focus on this topic have been done by domestic and foreign scholar, which can be summarized as indirect anti-push method and direct analysis method through analyzing the existing research methods deeply.Indirect anti-push method includes two steps. Firstly, change the transmission distance, reception distance, system resonance parameters and other key circuit parameters, obtain different parameters of the input and output power in the test system. Secondly, reverse the efficiency of transmission system and mutual inductance coupling coefficient, verify the existing theoretical model. Direct analysis method is to directly measure the magnetic field strength, establish the spatial magnetic field distribution model, and analyze the magnetic field parameters, so as to understand the system and solve the current problems. Direct analysis method based on spatial magnetic field measurement is the most direct and effective method to solve the technical problem, because the fact that space magnetic field is the medium of energy transmission of magnetic resonance coupled wireless energy transmission technology,In this research, in view of the measurement of the spatial high frequency magnetic field of the magnetic resonance coupled wireless power transmission system, a distributed high frequency magnetic field measurement method is proposed to realize the precision measurement of the spatial high frequency magnetic field parameters. Meanwhile, detailed measurement and control system are designed for this method. Also, the design of digital magnetic sensor, the design of magnetic sensor array, the design of distributed bus, the design of motor drive servo system and the design of measuring and controlling station system are discussed.Furthermore, according to the electromagnetic induction method, the impedance matching, program-controlled amplification, sampling and holding circuit are introduced in detail,the formation of a magnetic sensor surface array composed of multiple magnetic sensor nodes is formed, the communication protocol of the upper and lower computer is established, the software of the upper and lower computer system is compiled.The experiment makes precision translation control-platform of the length of 5 meters. Then, the hardware and software verification test is carried out on the area array system, which is composed of 36 magnetic transmission nodes. The experimental results show that the system is working properly, the hardware and software are reliable, which can realize the distributed acquisition of spatial high frequency magnetic field and achieve the expected target. |
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