The Key Issues Of The Time Accuracy Of The Extension Device Test

The effect of improving the delay precision of the delay device was researched mainly as follows: the prescription and the preparation of the delay composition, the filling mode of delay element, the ignition of nonel tube and so on.The molybdenum delay composition was prepared by two methods -heteronuclear crystalline by decreased the liquid temperature or on common, and the mechanism of heteronuclear crystalline was discussed. Through the burning test and thermal analysis, it was shown that the uniformity and burning stabilization of composition improved which mixed by the fomer method.The filling structure of silicon delay composition was studied by two ways: filling and pressure pressing in directly and the delay cord. It was shown that under directly filling mode, the effect of press to delay was higher, and the delay precision was best when the press pressure was 100MPa. As to the same delay cord , the effect of differed delay cord part to delay precision was studied, the results shown the delay precision of the ends of delay cord was lower than the middle part, and the relationship between delay time and length of delay cord was direct ratio in the middle part. It is also showed that the delay cord element has better delay precision.The theory analysis and experiment research of capability ignition by the nonel tube was studied, the main work was effect of way of decrease explode to ignition of delay precision and delay precision. It was shown that the ignition energy was enough when used nonel tube to ignited silicon and molybdenum delay composition during experiment, it was tested the series of detonation elimination experiments both in whole chamber and the chamber with holes on the sides, it was found that both ways are feasible, and the precision of delay time was better when having the detonation elimination, and having the best chamber.