| 简介 |
The present invention provides a solenoid type muzzle velocity measuring device and a solenoid type muzzle velocity measuring method, capable of precisely measuring an initial muzzle velocity of a bullet in a wide range of bullet speed measurements while being less influenced by external environments such as radio jamming. The muzzle velocity measuring device comprises : a solenoid coil unit including a first solenoid coil portion installed at a set position away from a muzzle and generating a velocity sensing signal for a bullet, and a second solenoid coil portion installed at a predetermined distance from the first solenoid coil portion; a sensing signal input unit receiving the velocity sensing signal from the solenoid coil unit; a signal amplifying unit removing a noise of a signal input from the sensing signal input unit and amplifying the signal; a low pass filter unit selectively passing a measurement band of the signal amplified by the signal amplification unit; a zero crossing logic unit generating a zero crossing pulse from the signal filtered by the low pass filter unit by using a signal change of the first and second solenoid coils; a central control unit controlling each unit of the muzzle velocity measuring device and calculating the bullet speed from the zero crossing pulse; and a condition input unit receiving measurement conditions.(210) Installing a solenoid coil unit and magnetizing a bullet(220) Inputting basic conditions(230) Testing a basic signal(240) Calculating a first bullet speed(250) Inputting compensation conditions(260) Calculating a composite compensation value(270) Calculating a final muzzle velocity and an initial bullet speed(280) Inputting error conditions(290) Calculating extended uncertaintyCOPYRIGHT KIPO 2018 |
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