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Vibration parameter estimation methods for ultrasonic measurement systems – a review

机译:超声测量系统的振动参数估计方法–综述

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摘要

A review of vibration signal estimation techniques employed in ultrasonic vibration measurement systems is presented. The review focuses on the Doppler signal extraction methods including the theory and analysis pertaining to the background of ultrasonic vibration measurement techniques. The phase modulated received signal in the vibration measurement system involves constant phase shift because of ultrasonic path length, phase shift introduced by Doppler effect because of vibrating object and the parametric phase shift caused by interaction of high frequency ultrasonic wave and low pressure developed by vibrating object. Among the three phase shifts, the Doppler phase shift contains the vibrating signal information and the extraction of Doppler signal helps in knowing the velocity of the vibrating object, amplitude and phase of the vibration. Various techniques of Doppler phase shift retrieval are categorised based on the modulation index estimation procedures from the received ultrasonic signal. An analysis is made based on the information retrieval methods for estimation of vibration signal parameters, range of the vibration amplitude, frequency and the preferable carrier frequency for transmission. Further, the analysis also presents various applications in which ultrasonic vibration measurements system are employed successfully.
机译:介绍了超声振动测量系统中采用的振动信号估计技术。综述着重于多普勒信号提取方法,包括与超声振动测量技术背景相关的理论和分析。振动测量系统中的调相接收信号由于超声路径长度而引起恒定的相移,由于振动物体而由多普勒效应引起的相移以及由高频超声波和由振动物体产生的低压的相互作用而引起的参数相移。 。在这三个相移中,多普勒相移包含振动信号信息,并且多普勒信号的提取有助于了解振动对象的速度,振动的幅度和相位。基于来自接收到的超声信号的调制指数估计过程,对多普勒相移检索的各种技术进行分类。基于信息检索方法进行分析,以估计振动信号参数,振动幅度范围,频率以及用于传输的最佳载波频率。此外,分析还提出了成功应用超声振动测量系统的各种应用。

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