采用德国西门子IGBT变频，电压反馈串联谐振电路。变换效率高达97.5%以上。
Adopt IGBT frequency conversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.
为了避免LCL滤波器发生电流谐振，通常需要加入阻尼电阻，则导致损耗增加，降低系统效率。
To avoid the current resonance caused by LCL filter, damping resistance is usually needed, which increases wastage and reduces system efficiency.
通过分析声表面波谐振器对不同激励信号的响应，本文选用正弦脉冲串作为激励信号，来提高系统工作效率和传感距离。
Through the analysis of the response of resonator base on different pumping signals, sine burst is used for pumping signal of the system to improve the efficiency and detecting-distance.
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