A high-frequency magnetic field measurement system

Abstract

The invention discloses a high-frequency magnetic field measurement system, which specifically includes a magnetic field induction module, a signal transmission module and a signal display and storage module. The magnetic field sensing module is mainly composed of a coil-type magnetic field sensor, and its function is to convert the changing magnetic field into an electrical signal; the signal transmission module is composed of an optical transmitter, a multimode optical fiber, and an optical receiver. The high-frequency electrical signal received by the sensor is converted into an optical signal, and the optical signal is transmitted to the optical receiver through a multi-mode optical fiber. The optical signal is restored to an electrical signal through the photoelectric conversion function of the optical receiver. The high-frequency magnetic field waveform is displayed. The invention has a long signal transmission distance of up to 1km, small signal attenuation, small equipment volume, strong anti-interference ability, convenient connection of each module, and can be used for measuring a strong magnetic field up to 1GHz.

Description

technical field [0001] The invention belongs to the field of magnetic field measurement, in particular to a high-frequency magnetic field measurement system. Background technique [0002] As we all know, modern society is inseparable from electricity and magnetism, and electricity and magnetism penetrate into all areas of people's lives in various forms. Especially since the 20th century, with the development and application of communication and electrical technology, the interference and anti-interference problems of electrical and electronic equipment have become increasingly prominent. For this reason, experts and scholars in the world began to study the problem of electromagnetic interference. With the development of microelectronics technology and the improvement of electrification level, the subject of electromagnetic compatibility has developed rapidly in the process of understanding, researching and controlling electromagnetic interference phenomena. At present, th...

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Problems solved by technology

At present, the equipment used for magnetic field measurement can only measure the magnetic field of about 100MHz at most, and the reliability is not high. There are few equipment in China for the measurement of high-frequency magnetic field, and the signal transmission uses coaxial cables, which is not conducive to the anti-corrosion of the signal. Attenuation and anti-interference, transmission equipment using coaxial cables takes up a lot of space and is bulky, which is not conducive to installation and maintenance

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