长轨检测超声换能器驱动电路的设计

发布时间：2018-03-08 03:07

本文选题：长轨检测　切入点：超声换能器　出处：《压电与声光》2017年06期 　论文类型：期刊论文

【摘要】：鉴于超声换能器(换能器)传统驱动电路中存在发射效率低,激励信号有拖尾的问题,该文提出了一种改进型驱动电路方案。首先,对换能器匹配和激励信号拖尾吸收的理论进行说明,并从匹配和拖尾吸收等方面综合考虑对驱动电路进行改进;其次,采用一发一收的机制,在600m60型钢轨上搭建实验平台,并对传统无匹配、有匹配驱动电路和该文设计的驱动电路的性能进行对比。实验结果表明,与传统无匹配驱动电路相比,改进型驱动电路消除了激励信号拖尾且波形光滑,接收信号中心频点相对幅值提高了98.97%;与传统有匹配驱动电路相比,改进型驱动电路消除了激励信号拖尾且波形光滑,接收信号中心频点相对幅值提高了50.45%。
[Abstract]:In view of the problems of low transmission efficiency and trailing of excitation signal in the traditional drive circuit of ultrasonic transducer, an improved drive circuit scheme is proposed in this paper. The theory of transducer matching and excitation signal trailing absorption is explained, and the driving circuit is improved synthetically from the aspects of matching and trailing absorption. Secondly, the experimental platform is built on 600m60 rail with the mechanism of "one send and one receiving". The performance of the traditional unmatched, matched drive circuit and the drive circuit designed in this paper are compared. The experimental results show that the improved drive circuit eliminates the trailing of the excitation signal and the waveform is smooth, compared with the traditional unmatched drive circuit. Compared with the traditional matched drive circuit, the improved drive circuit eliminates the trailing and smooth waveform of the excitation signal, and the relative amplitude of the frequency point in the center of the received signal increases by 50.455.Compared with the traditional matched drive circuit, the relative amplitude of the frequency point of the receiving signal center is increased 98.97.
【作者单位】：西安理工大学自动化与信息工程学院;
【基金】：国家自然科学基金资助项目(51477138) 陕西省教育厅产业化专项基金资助项目(15JF026)
【分类号】：TB552

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