两种组合电探针在爆轰实验中的应用

Application of Two Kinds of Combined Probes in Detonation Experiments

利用两种不同组合的电探针测试平面爆轰波驱动的金属飞片到达固定位置的时刻,对比两种组合探针测试结果的一致性;同时利用双灵敏度VISAR(任意反射表面速度干涉仪)记录飞片自由面的速度及位移历史,并与电探针的测试数据对比。结果表明:纵向组合探针的第1台阶探针与横向组合探针的测试结果一致,第2台阶探针与横向组合探针的测试结果存在偏差,随着纵向组合探针台阶的增加,与横向组合探针的偏差增大,其原因是探针对飞片运动的干扰。测点1的横向组合探针和纵向组合探针与VISAR的测试结果最大偏差分别为0.71%和0.67%,测点2的最大偏差分别为0.98%和0.90%.横向组合探针可以和纵向组合探针一起,组成更复杂的多层次探针阵列,以便在一发实验中获得更多数据。

The arriving time of the metal flyer at some point was measured by two kinds of combined probes for checking their uniformity. Meanwhile, the free-surface velocity and displacement of the metal flyer were measured by double-sensitive VISAR for contrast with combined probes. Experiment results show that the first stage probe of the vertical combined probe coincides well with the horizontal combined probe; the second stage probe has a little difference with the horizontal combined probe; the difference increases along with the stage of vertical combined probe, and the reason is the interference of the probe on the flyer. The maximum differences at the measuring point 1 between two kinds of combination probes and VISAR are 0.71% and 0.67% respectively, and the maximum differences at point 2 are 0.98% and 0.90% respectively. Two kinds of combined probes can be used together to acquire more data in the ex- periments.