Device for determining projectile velocity, especially at the muzzle of a gun barrel

Abstract

A device for determining projectile velocity at a gun barrel muzzle, the device including at least two sensors spaced some distance apart be integrated on or directly in the gun barrel. During the passage of the projectile, the sensors undergo expansion due to the gas pressure at the base of the projectile and the pressure of the rotating band of the projectile on the inside of the gun barrel. This expansion is converted to an electric signal, which, if necessary, is amplified and then supplied to a signal processing device connected on the output side of the sensors. High-temperature-resistant quartz sensors in the form of longitudinal measuring pins are preferably used as the sensors, which are installed either in a carrier ring on or around the gun barrel or directly in the gun barrel.

1 . A device for determining projectile velocity at a muzzle of a gun barrel, comprising: 
 a signal analysis unit;    an amplifier stage; and    at least two sensors or pairs of sensors, which are integrated on and/or in the gun barrel and are operative to measure parameters related to velocity of a projectile and transmit the parameters from an output side to the signal analysis unit via the amplifier stage for analysis, the sensors being integrated in a recess or passage of a carrier ring mounted on the gun barrel or being integrated directly in recesses of the gun barrel.    
   
   
       2 . The device in accordance with  claim 1 , wherein the sensors are high-temperature-resistant longitudinal measuring pins.  
   
   
       3 . The device in accordance with  claim 1 , wherein the gun barrel has an outside diameter turned in order to hold the carrier rings in suitable places so that the carrier rings can be shrunk fit in these places.  
   
   
       4 . The device in accordance with  claim 1 , wherein the recesses or passages are bores.  
   
   
       5 . The device in accordance with  claim 2 , wherein the sensors are quartz measuring pins.