VISAR数据处理新方法及程序

分析了不同VISAR数据处理方法的原理 ,并在此基础上开发了新的VISAR数据处理程序。该程序采用极坐标法作为计算内核 ,消除了各路信号的不灵敏区 ;计算所需的各个参数相位差、振幅因子的比值 等采用参数拟合的方法从实验信号本身得出 ;程序可以处理信号缺失的情况 ,当四路信号只取得三路时 ,数据处理能照样进行 ;程序的后期处理功能可以判断丢失条纹的数目并恢复速度历史。初步讨论了参数误差对结果的影响。

VISAR Data Reduction Method and Program

The principle of two different VISAR data reduction method is analyzed and a new data reduction program for four detector system has been designed.Polar coordinates is used to compute phase angle so that we can get rid of non sensitivity section of each signal.Parameters for data reduction such as phase difference can be derived from experimental signal itself by means of parameter fitting function.The program is applicable under the situation that we only get three of four signals.It also can judge how many fringes are lost due to bandwidth limit and re establish the velocity history.