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第五节压电探头一些主要特性的讨论尽管探头的结构形式和种类可以是多种多样的,作为探头的特性来讲,总可以分为换能器件本身的一些声学特性和与仪器联合起来的一些使用特性两个方面。5-1探头本身的一些声学特性1.探头的阻抗特性图3-1所示结构的等效电路图3-s,在谐振频率附近,可由图5-1(a)所示的集总参量的等效电路图表示。图中 L C R(R=R_M+R_A)分别为探头的动生阻
Section V piezoelectric probe some of the main features of the discussion Although the probe structure and type can be varied, as the probe’s characteristics, can always be divided into some of the transducing device itself, some of the acoustic properties and associated with the instrument Some use features two aspects. 5-1 Some acoustic properties of the probe itself 1. Impedance characteristics of the probe Equivalent circuit of the structure shown in Figure 3-1 Figure 3-s, near the resonant frequency, can be represented by the lumped parameter shown in Figure 5-1 (a) Equivalent circuit diagram representation. Figure L C R (R = R_M + R_A) respectively for the dynamic impedance of the probe