Biomedical wireless energy transmission system

Abstract

The invention relates to a biomedical wireless energy transmission system. Through adopting a magnetic coupling resonant wireless energy transmission technology, a transmission distance demand of general biomedical implanted equipment is satisfied, wherein in the technology, a farthest transmission distance can reach a meter-level range; a reconfigurable rectifier is realized to work under three working modes of a half-wave rectifier, a full-wave rectifier and a voltage multiplier, and duty ratios of the different working modes are controlled so that transmission efficiency can be guaranteed and simultaneously output power of an internal receiving circuit is adjustable; and different input capacitances of the rectifier under the different working modes can cause a detuning problem of an internal resonance circuit, therefore, a resonance adjusting unit is introduced so that internal and external resonance circuits are at a same resonant frequency, and transmission efficiency is increased. In addition, through a voltage regulation device and an overvoltage protection circuit, a supply voltage of the biomedical implanted equipment is safe and stable.

Description

technical field [0001] The invention relates to the field of wireless energy transmission, in particular to a biomedical wireless energy transmission system. Background technique [0002] With the rapid development of semiconductor integrated circuit technology, wireless information technology, and medical electronics technology, many fields such as electronics, biology, and medical treatment have integrated and promoted each other. Among them, the research on biomedical microelectronic technology for the purpose of biomedicine has become a new hot research field. Signal transmission and energy transmission are the two most important fields involved in biomedical microelectronics technology. While biomedical wireless signal transmission technology continues to develop and gradually mature, the traditional microchemical battery pack power supply method can no longer meet the requirements of implantation. Therefore, biomedical wireless energy transmission technology has becom...

AI Technical Summary

Problems solved by technology

Signal transmission and energy transmission are the two most important fields involved in biomedical microelectronics technology. While biomedical wireless signal transmission technology continues to develop and gradually mature, the traditional microchemical battery pack power supply method can no longer meet the requirements of implantation. Therefore, biomedical wireless energy transmission technology has become the focus of future development and has attracted widespread attention.

[0003] At present, the existing biological wireless energy transfer system adopts percutaneous wireless energy transfer and inductive wireless energy transfer technology, which is difficult to promote in the field of biomedicine due to its short output distance.

In 2007, although MIT Marin Soljacic and others proposed that the magnetically coupled resonant wireless energy transmission technology can solve the problem of transmission distance, a large number of these existing studies are only aimed at optimizing the system for specific loads and transmission distances. Transmission Efficiency and Output Efficiency

In the actual biomedical field, the movement of people and the internal environment are complex and changeable, which will lead to changes in the distance between the transmitting and receiving coils, and even the misalignment of the transmitting and receiving coils, resulting in the problem of greatly reduced energy transmission efficiency and insufficient power supply.

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