摘要
模糊函数是一种超声检测系统性能分析的重要工具。文中首先给出超声信号高斯模型,接着推导该模型的模糊函数,最后讨论分析与探测距离和移动目标速度相关的超声检测系统的时间和频率分辨率,并给出了相关超声检测系统参数选择的参考。理论推导和仿真结果表明:辨别运动着的目标,用长持续时间的信号,即窄带宽;辨别近距离的目标,用短持续时间的信号,即宽带宽。
Fuzzy function is an important tool for the performance analysis of ultrasonic testing systems. In this paper, the ultrasonic Gaussian model is proposed at first. Then, the fuzzy function of the ultrasonic signal for Gaussian model is derived in detail. Finally, the resolution of time and frequency for an ultrasonic testing system is analyzed, which is related to distance of detection target and speed of moving target. Reference for selecting parameter value of an ultrasonic testing system is provided. Theoretical derivation and simulation results show that it is better to discern moving targets by using a narrow bandwidth signal. And for distinguishing
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2016年第4期26-31,共6页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(61561008)
广西自然科学基金资助项目(2014GXNSFBB118005)
广西高校科研资助项目(ZD2014124)
广西混杂计算与集成电路设计分析重点实验室开放课题资助项目(HCIC2014)
广西民族大学科研资助项目(2014MDQD019
2015MDYB014)
关键词
超声
模糊函数
分辨率分析
高斯模型
ultrasonic
fuzzy function
resolution short-range targets, a short-duration signal is ideal. analysis
Gaussian model
