摘要
针对以往声学测量中更多考虑声波传播情况,忽略激励信号与换能器能量转换对测量声信号影响的问题,对不同信号激励下换能器的瞬态响应进行了研究。联立薄圆片压电换能器的运动方程与压电方程,建立了换能器的机-电等效电路。利用留数定理推导出了厚度极化薄圆片压电换能器的电-声/声-电冲激响应和传输函数。基于傅里叶变换以及叠加定理建立了并行传输网络模型,用于描述换能器的电-声和声-电转换过程。仿真结果表明,正弦信号激励下换能器的输出结果为一个静止到稳态正弦振动的子波,门选正弦信号激励下换能器的输出信号呈周期性振荡,换能器的输出信号受激励信号与换能器能量转换的影响。
In order to solve the problem that acoustic wave propagation is considered more in the previous acoustic measurement,while the influence of excitation signal and energy conversion of transducer on acoustic signal measurement was ignored,the transient response of transducer under different signal excitation is studied.The machine-electrical equivalent circuit of the transducer is established by combining the motion equation and the piezoelectric equation of the thin-wafer transducer.Using the residue theorem,the electric-acoustic/acoustic-electrical impulse response and transmission function of a thickness polarized thin-wafer piezoelectric transducer are derived.Based on the Fourier transform and superposition theorem,a parallel transmission network model is established to describe the electro-acoustic and acoustic-electrical conversion process of the transducer.Simulation results show that the output of the transducer is a static sinusoidal vibration wavelet under the sinusoidal signal excitation,and the output signal of the transducer oscillates periodically under gate choice sinusoidal signal excitation.The output signal of the transducer is affected by the energy conversion between the excitation signal and the transducer.
作者
法林
刘栋宁
梁蕊
王宝妮
王艺美
史贵全
李玉霞
赵梅山
FA Lin;LIU Dongning;LIANG Rui;WANG Baoni;WANG Yimei;SHI Guiquan;LI Yuxia;ZHAO Meishan(School of Electronic Engineering,Xi an University of Posts and Telecommunications,Xi an 710121,China;School of Information Engineering,Xi an Fanyi University,Xi an 710105,China;Logging Institute,CNPC Logging,Xi an 710061,China;James Franck Institute and Department of Chemistry,The University of Chicago,Chicago 60637,USA)
出处
《西安邮电大学学报》
2023年第1期37-49,共13页
Journal of Xi’an University of Posts and Telecommunications
基金
国家自然科学基金项目(41974130)。
关键词
薄圆片压电换能器
并行传输
机电等效
声学测量
thin-wafer piezoelectric transducer
parallel transmission
electromechanical equivalence
acoustic measurement
