压电换能器谐振频率动态检测的研究

摘要

The detection and research on the serial resonant frequency of ultrasonic transducer are all based on static analysis, thus the dynamic parameter identification and real-time tracking for actual applicable circuit are impossible. Based on the equivalent circuit of piezoelectric transducer, and combining with the admittance chart analysis, the method of detecting resonant frequency and misted parameter for transducer is proposed. The method is significant to automatic identifying and tracking ultrasonic power supply, and dynamic matching piezoelectric transducer resonant frequency. The result of dynamic detection indicates that this method is able to detect the resonant frequency of the piezoelectric transducer.%超声波换能器串联谐振频率的检测和研究都是基于静态分析,因而存在无法对实际应用电路进行动态参数的识别和实时跟踪的缺点.基于压电换能器的等效电路,结合导纳圆分析,提出了一种检测换能器谐振频率和相关参数的方法.该方法对超声波电源实现自动识别、跟踪以及动态匹配压电换能器谐振频率等具有非常重要的参考作用.动态检测结果表明,该方法可以较好地检测出压电换能器的谐振频率.