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3-3复合压电超声传感器具有如下优点,(1)声阻抗较低约4.5～5×10~6kg/m~2·s与水比较接近;(2)Q值较低;(3)静水压电灵敏度高;(4)横向耦合甚小;(5)频带宽,波形简单;(6)耐机械冲击。
3-3 composite piezoelectric ultrasonic sensor has the following advantages, (1) low acoustic impedance of about 4.5 ~ 5 × 10 ~ 6kg / m ~ 2 · s and water is relatively close; (2) Q value is low; Piezoelectric high sensitivity; (4) Lateral coupling is very small; (5) Frequency bandwidth, waveform simple; (6) Resistant to mechanical shock.