【摘要】 设计研制了一种以TMS320 VC5402数字信号处理(DSP)为核心处理器,以分时采集方式对多路超声模拟信号进行的高速数据采集与处理系统,采样率最高可达40 MHz。改进了无限脉冲响应(IIR)数字滤波的运算,并在定点DSP芯片上实现,可以灵活地对采集信号的带外噪声进行处理,提高了采集信号的信噪比。实验表明,该系统是一套较为理想的超声信号采集系统。更多还原

【Abstract】 A high speed sampling system based on TMS320 VC5402 is introduced.Its sampling rate is about 40 MHz.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 TMS320 VC5402,and used in detecting ultrasonic echo-signal to remove noise.And the result is satisfactory.更多还原