论文部分内容阅读
为了监测人工心脏的性能指标,设计了超声多普勒血流测量系统。利用计算机仿真血流信号,选择血流信号处理和分析方法。根据多普勒效应,采集血流信号并解调,经过滤波、放大等,之后送入DSP中对超声模拟信号进行A/D转换和频谱处理。结果表明,计算机仿真的多普勒血流信号可以直观的估算信号处理算法的相对误差,测试系统可提供准确的血流信号特征。
To monitor the performance of the artificial heart, an ultrasound Doppler flow measurement system was designed. Using computer simulation of blood flow signals, select the blood flow signal processing and analysis methods. According to the Doppler effect, blood flow signal acquisition and demodulation, after filtering, amplification, etc., and then into the DSP on the ultrasonic analog signal A / D conversion and spectrum processing. The results show that the computer simulation of Doppler flow signal can directly estimate the relative error of signal processing algorithm, and the test system can provide accurate characteristics of blood flow signal.