基于脉冲压缩技术的宽带透射系数测量方法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (3) : 146-149.

论文

基于脉冲压缩技术的宽带透射系数测量方法

于盛齐杨士莪黄益旺吴琼

作者信息 +

A Wide-band Measurement Method for Transmission Coefficient Based on Pulse Compression Technique

YU Sheng-qi YANG Shi-e HUANG Yi-wang WU Qiong

Author information +

文章历史 +

摘要

透射系数是水声材料的一项重要声学参数，为了在水池中对水声材料的透射系数进行测量，本文提出了一种基于脉冲压缩技术的测量方法，对接收信号进行压缩来提取直达波。该方法不仅可以克服实验过程中经常遇到的多途干扰，而且测量过程简单，可以同时获得测量频带内所有频点的透射系数，即实现了对透射系数的宽带测量。在水池环境下，通过对20kHz-60kHz频率范围内玻璃缸的窄带测量与宽带测量结果的比较，验证了该方法的有效性。

Abstract

Transmission coefficient is one of the most significant parameters of underwater acoustic materials. In order to measure the transmission coefficient in tank, a method based on pulse compression technique is proposed, where the directive wave are extracted from the compressed signal. The method can overcome unavoidable multi-path disturbance in experiment, and easily obtain the transmission coefficient for all the frequencies in the measured frequency band simultaneously. That is, wide-band measurement is realized. This method is verified through comparison between the results of narrow and wide-band measurements to a glass box, which are conducted in the frequency range of 20kHz-60kHz in a tank.

导出引用

于盛齐杨士莪黄益旺吴琼. 基于脉冲压缩技术的宽带透射系数测量方法[J]. 振动与冲击, 2013, 32(3): 146-149

YU Sheng-qi YANG Shi-e HUANG Yi-wang WU Qiong. A Wide-band Measurement Method for Transmission Coefficient Based on Pulse Compression Technique[J]. Journal of Vibration and Shock, 2013, 32(3): 146-149