高速衰减正弦信号的采样及曲线拟合方法

Method on Sampling and Curve Fitting of High Speed Damped Sine Wave

为了更加准确地对起爆脉冲电流进行测量,提出一种起爆脉冲电流衰减正弦信号的采样及曲线拟合方案。通过上位机软件对ISA总线读取暂存于FIFO中的采样数据,设计了基于高速ADC+FIFO的数据采集模块,并对某武器系统输出的单次衰减正弦信号进行采样存储,根据采样结果进行曲线拟合。拟合结果表明:该方法可精确测量被测信号的幅度与周期,并绘制出信号波形。

In order to measure initiation pulse current more accurately,put forward a method of sampling and curve-fitting project to measure the signal.Upper computer software read the sample data stored in the FIFO via the ISA bus,the data acquisition module was devised based on high-speed ADC and FIFO,which was used to sample and storage the single damped sine wave,to do the curve fitting according to the sampling results.The fitting results show that the method can accurately measure the magnitude and the cycle of the signal,and also can draw out the waveform.