A Study of Moving Detonator Stab Sensitivity

A test of moving detonator stab sensitivity involves the simulation of the principle of functioning of the detonator and firing pin in actual conditions, so as to test and collect the characteristics data. In this paper we describe tests for the sensitivity curve when the detonator and firing pin impact at a velocity of 0.3 -8 m/s by use of the moving detonator stab sensitivity tester we have designed and compared the test results with that of static tests using the drop weight apparatus. It is concluded that the input energy determines the detonator stab sensitivity under dynamic condition. Mass of the firing pin has an effect larger than that of the impact velocity. The energy lost decreases with the increase of impact velocity when the firing pin mass is fixed. The estimations resulting from static test is conservative concerning the reliability and safety of an HZ-2 cap.