声速测定实验中超声换能器的非线性行为  

Nonlinear behaviors of the ultrasonic transducers in the sound speed measurement experiment

作　　者：杨睿智[1] 李熹辰 蔡昊君 杨胡江[1] 肖井华[1] 

机构地区：[1]北京邮电大学理学院,北京100876

出　　处：《物理实验》2017年第4期6-10,15,共6页Physics Experimentation

基　　金：北京邮电大学大学生创新训练项目;国家自然科学基金项目(No.s61377067;No.11375033)

摘　　要：在声速测定实验中,通过频谱分析、幅频特性曲线和相图,研究了发射和接收超声换能器在不同频率的驱动下从线性状态转变成非线性状态的过程,观察了超声换能器表现出的准周期态、倍频现象、磁滞和双稳态现象等丰富的动力学行为.In the sound speed measurement experiment, by analyzing the spectrum, the ampli- tude-frequency characteristic curve and the phase diagram, the transition process from linear state into a nonlinear state was studied when the ultrasonic transmitter and receiver were driven by different frequencies. Rich dynamic behaviors of the ultrasonic transducer were observed, such as quasi-periodic state, frequency doubling phenomena, hysteresis and bistable phenomenon.

关 键 词：超声换能器 非线性 声速 

分 类 号：O421.1[理学—声学] O415.5[理学—物理]