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  • SPICE simulation of a piezo resonator with water as acoustic path. piezoelectric transducer (PZT-5A material) with acoustic path that consists of the transducer body X1 with thickness L=0.5m and two infinite water layers X2,X3 with cross-sectional area of 1cm2 (S=1e-4m2) for all layers. V=1500m/s is sound speed and d=1000kg/m3 is the density.

    • Free
    • Advanced
    • <10
    • LTspice
    • IV
    • No
    • three basic models of the acoustic system frequency dependence of voltage current and deformation velocity

  • with only three parameters, Io the maximum current, Vo the maximum voltage, dV the voltage slope for current decreases, we can derive a good model of the diode. SPICE simulation of resulting diode model.

    • Free
    • Simple
    • <10
    • LTspice
    • IV
    • No
    • I-V characteristic parametric analysis

  • SPICE simulation of a piezoelectric resonator with the air round-up. This circuit uses a model of the acoustic medium adapted to an electric transmission line. In analogy to the equivalent circuit of a transmission line, the model proposed represents the piezoelectric thickness vibrator by lumped elements, i.e., capacitor, inductor, and current-controlled current source. In order to unify electric and acoustic theory, an impedance type analogy is chosen where mechanical force is represented by voltage and particle velocity is represented by current. This configuration implements a Resonator with the Air round-up.

    • Free
    • Advanced
    • <10
    • LTspice
    • IV
    • No
    • piezoelectric resonator with the air round up Frequency dependence of Voltage Current and Deformation Velocity of a free Piezoelectric resonator with the air round up

  • SPICE simulation of an electro-acustic system. The circuit consists of a pulse generator and diode limiters and an acoustic path with the piezoelectric transducer (PZT-5A material). The acoustic path consist of two infinite iron layers X2, X4; transducer body X1, with thickness L=0.5mm; and water layer X3 L=10mm. All acoustic elements cross-sectional area is 1cm2 (S=1e-4m2). The V parameter under X2, X3, X4 is sound speed and d is density (Water: V=1500m/s, d=1000kg/m3; Iron: V=5170m/s, d=7900kg/m3). This model allows the simultaneous evaluation of the electric and acoustic characteristics of a complex piezoelectric system with an acoustic load. This model is very useful for the investigation of the acoustic and electric coupling. It also helps to optimize the transducer’s power amplifier for best acoustic effectiveness.

    • Free
    • Advanced
    • <10
    • LTspice
    • IV
    • No
    • voltage of echo pulses in TX, TXRX and RX