TMS320C5402数字IIR滤波器的超声回波信号检测

Detecting ultrasonic echo-signal using IIR digital filter based on TMS320C5402

通过对IIR滤波器结构分析,制作了超声回波信号高速采样系统,并基于TMS320C5402数字IIR滤波器,对超声回波信号进行了降噪处理.结果表明,与不经过IIR滤波的数字采样相比,应用该方法可以较好恢复超声回波信号,这对超声信号的在线检测有一定实用意义.

The digital filters include IIR filter and FIR filter, and IIR filter＇s processing speed and memory required are better than those of FIR filter. In this paper, the design of an IIR digital filter is introduced. Furthermore, a simplified design of an IIR filter is also discussed with the analysis of the IIR structure. In this way, the algorithm can be implemented on TMS320C5402, and used in detecting ultrasonic echo-signal to remove noise. And the result is satisfactory.