论文部分内容阅读
介绍了超声信号数字频谱分析的原理和实施方法 ,即通过信号采样、A/D转换、FFT变换等可获得换能器及超声回波的的频谱特性参数。介绍了德国 KK公司和南昌航院自制探头的波形和频谱图 ,认为根据频谱测量结果 ,适当改变有关参数就有可能研制高性能换能器
The principle and implementation method of digital spectrum analysis of ultrasonic signal are introduced, that is, the spectral characteristic parameters of transducer and ultrasonic echo can be obtained through signal sampling, A / D conversion and FFT transformation. Introduced the waveform and spectrogram of self-made probe of German KK Company and Nanchang Hangyuan Company. It is considered that it is possible to develop high-performance transducers according to the measurement results of the spectrum and appropriate changes of relevant parameters