【摘要】 小波变换具有空间局部化性质 ,因此可利用小波变换的模极大值点检测动态测量信号的突变点。提出了用单个线圈靶测量水下弹丸初速的原理及方法 ,由实弹射击实验获得的线圈靶信号 ,利用小波变换分析了弹丸穿越线圈靶时产生的电动势 ,建立了弹丸穿越线圈靶时的时间间隔 t及运动弹丸速度的计算方法 ,并与双线圈靶弹丸初速测试结果进行了比对 ,证明了该方法的可行性。更多还原

【Abstract】 One major advantage afforded by wavelets is the ability to perform local analysis in space, so wavelet transform are well adapted for detecting an abrupt change of the signal. The principle and method of measuring velocity of projectile are brought by single coil target, and the scheme of system is introduced, the computational approachs for interval “t” passing the target and initial velocity of projectile are built ,then compared with result of double coil targets, feasibility of the method is proved.更多还原