摘要
阐述了超声信号数字频谱分析的原理和实施方法, 通过信号采样、A/D转换、时频变换等可获得超声回波频谱特性参数。同时, 分析了影响系统频谱特性的因素, 对组建高性能超声数字信号分析系统很有意义。
The theory and application of ultrasonic digital spectrum was analyzed.Though signal sampling,A/D transformation, and time-frequency transformation, spectrum parameter produced by ultrasonic response was obtained.The factors of spectrum that influence system characteristic were analyzed,it is of great importance to the establishment of analysis system of high-quality signal.
出处
《机床与液压》
北大核心
2005年第1期122-124,共3页
Machine Tool & Hydraulics
关键词
超声频谱
波形
换能器
Ultrasonic spectrum
Waveform
Transducer
