Wireless information and power transfer system based on magnetic coupling

Abstract

The invention discloses a wireless energy-carrying communication system based on magnetic coupling, which is characterized in that a direct-current power supply generates an alternating signal through an inverter, an external coil driver receives the inverted signal of the power supply, an external coil is excited after power amplification, a high-frequency current in the external coil can generate a high-frequency alternating magnetic field around the high-frequency alternating magnetic field, and the high-frequency alternating magnetic field is converted into a high-frequency alternating magnetic field; the internal coil is influenced to generate alternating current, the alternating current is converted into direct current through the rectifying and voltage-stabilizing circuit to be transmitted to the piezoelectric sensor, and electric energy of an external power supply of the speed reducer is transmitted to the inside so as to supply electric energy to the internal circuit and the piezoelectric sensor. When the piezoelectric sensor collects the internal pressure change condition, changing current can be generated according to the inverse piezoelectric effect, is processed by the second signal processing circuit, is driven by the internal coil driver so as to influence the mutual inductance of the two coils, is transmitted to the external coil through the electromagnetic coupling channel of the two coils, and is transmitted to the processor through the first signal processing circuit. Therefore, data transmission of the internal piezoelectric sensor is carried out.

Description

technical field [0001] The invention belongs to the field of communication, and in particular relates to a wireless energy-carrying communication system based on magnetic coupling. Background technique [0002] Energy and information have been promoting the development of human society. The transmission of information has been realized wirelessly since the discovery of radio, while the transmission of electrical energy mainly relies on wired methods such as wires and cables. There are certain limitations in the field, such as detecting the state information of a closed metal structure. The traditional method is to transmit information through wires after perforating the closed metal structure. On the one hand, this method destroys the integrity of the metal structure. On the other hand, since the wires are arranged inside and outside the metal structure, it will increase the possibility of failure during the operation of the metal structure. If there are strict requirements ...

AI Technical Summary

Problems solved by technology

[0004] In summary, what we are currently facing is the wireless energy-carrying communication problem of piezoelectric sensors under the strong electromagnetic shielding effect. It is urgent to develop a high-efficiency wireless energy-carrying communication technology to realize the strain, stress, and vibration monitoring of key parts inside the metal wall.

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