Frequency Response Computation and Error Analyses

Aim To derive the error formulae for the algorithm of frequency response computation. Methods This algorithm was introduced theoretically, the error sources of the algorithm were analyzed and the formulae of the main error were derived. Results The repeatability and stability of the processing results of the algorithm are better than those measured by 1250 Frequency Analysor. Conclusion The error formulae derived are theoretically right and practically valid.

一种医学生理微小流量电磁信号放大滤波电路与实现

文章是对一种微小流量仪表的微小电信号与频率变化关系的实验检测。该仪表电极两端输出电信号,由于该信号极微弱,检测较困难,所以要在信号输出端设计放大滤波电路对此信号进行检测。检测系统由高速数据采集卡及仪器系统组成,用MATLAB软件对采样信号进行FFT处理,得出信号频率及其差异,并进行频率误差分析,结果说明该放大滤波电路具有一定的实用性。该微小流量仪表对医学生理中的微小流量信号检测有着一定的应用前景。