APPARATUS FOR MEASURING THE MUZZLE VELOCITY OF A PROJECTILE

摘要

Apparatus for measuring the muzzle velocity of a projectile has a measuring system at the muzzle of the gun barrel. The measuring system has two relatively spaced coils through which the projectile passes for inducing two signal pulses. Means are provided for compensating for changes in the distance between the two coils due to variations of temperature including a temperature-dependent resistor and wherein the thermoelectric voltage measured across said resistor is used as a compensating voltage in an electronic compensating circuit. The electronic compensating circuit has a phase-inverting stage to which the signal pulses are to be applied, wherein the output of the phase-inverting stage is connected to the input of a modified monostable multivibrator.