这里向大家介绍一种用双迹示波器测量压电晶体谐振频率的方法。这种方法和阻抗——电压法相比,优点是测试准确,既可测串联谐振频率,又可测并联谐振频率。压电晶体的等效电路如图1所示。其中 C_0为静态电容,L_1、C_1、r 代表压电晶体的动态参数。此等效电路的阻抗——频率特性如图2所示。从图中可看出,压电晶体 Here to introduce a method using double-track oscilloscope measurement of piezoelectric crystal resonance frequency. Compared with the impedance-voltage method, this method has the advantage of accurate testing, which can measure both the series resonance frequency and the parallel resonance frequency. Piezoelectric crystal equivalent circuit shown in Figure 1. Where C_0 is the static capacitance, L_1, C_1, r represent the piezoelectric crystal dynamic parameters. The impedance-frequency characteristics of this equivalent circuit are shown in Figure 2. It can be seen from the figure that the piezoelectric crystal