关键词: 内窥镜, 无线电能传输, 稳定性, Helmholtz发射线圈, 三维接收线圈

Abstract: For power supply stability and low efficiency problem in the movement of the endoscope, the method of improving the power of the wireless power transmission was studied based on the analysis of the attitude and position movement.Using elliptic coordinate system, variation of the magnetic induction of the three-dimensional receiving coiland the impact on mutual inductance and coupling coefficient in the Helmholtz transmit coil effect when the position and attitude change were derived. Experimental device of wireless power supply system with Endoscope was designed. Through simulation and experiment, it can be seen that the Helmholtz transmit coils can generate high intensity magnetic field uniform, than columnar spiral transmitting coil improves the transmission power of 100 mW in the case of axial deviation and angular misalignment. The experimental results show that the proposed scheme can meet the needs of the power supply of the wireless endoscope.

Key words: Endoscope, Wireless power transmission, Stability, Helmholtz transmitting coil, Three-dimensional receiving coil