通过压电器件进行能量传输在植入式生物医学领域具有良好的应用前景． 植入 深度是超声波无线能量传输系统的关键参数． 为了研究植入深度对传输效率的影响，设计 了一套水下超声波无线能量传输系统，通过调整发射器和接收器之间的相离来模拟不同 植入深度，采集了接收器的输出电压数据; 利用 SPSS 和 Matlab 软件，运用统计学方法对 实验数据进行分析，建立了线性回归模型，并对模型进行了校验． 实验结果表明: 超声波能 量传输效率与发射器和接收器之间的距离有关，接收器输出电压随距离的增大而减小; 所 建模型的拟合度达95%，预测误差小于 10%，具有较好的预测效果． 

Ultrasonic power transfer using piezoelectric devices is a promising wireless power transfer technology for biomedical implants． The depth of implantation is the key parameter of ultrasonic power transmission system． To explore the effect of depth of implantation on the power transmission efficiency，an ultrasonic power transfer system is designed underwater． The depth of implantation is simulated by the distance between the transmitter and the receiver． The output voltage of the receiver is acquired at different distances firstly and then analyzed by SPSS and Matlab software with statistics method． The linear regression model is established on the basis of analysis． The model is verified by means of the ultrasonic power transfer system． The experimental results show that the ultrasonic power transmission efficiency is related to the distance between a transmitter and a receiver． The output voltage of receiver decreases with the increase of distance． The proposed model has good prediction effect with the fitting degree greater than 95 percent and the prediction error less than 10 percent．