The time fuze can be used to control projectile detonation at a setting time,and the precision of the setting time determines the precision of the fuze.

As the measuring of the light signal of the explosion in air when rang proof fire test of the working time of the time fuze and the self destriction time of the self distruction type fuze is resericted considerably by weather, it is necessary to sendy the measuring method for the echo of the explosion is air.

Because of very short data transmission time and adverse operational environment it is important to choose an appropriate method for data coding and data reducing in the muzzle inductive setting of an electrical time fuze.