New Method for Projectile Velocity Measurement Using Faraday-Type Electromagnetic Sensor for Hypervelocity Impact Experiments and Detection Efficiency of the Method
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概要
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The authors developed a Faraday-type electromagnetic sensor as a conventional and fiducial technique for measuring the velocities of projectiles accelerated by propellant and gas guns. The sensor consists of a doughnut-shaped ferrite magnet and a pick-up coil, and detects the disturbance of the magnetic field in the pick-up coil caused by the passage of a metallic projectile. Projectile velocity is estimated from the time interval between two electromotive force signals and the distance between two sensors. Firing tests using a small nonmagnetic spherical Al projectile show that the projectile velocity is obtained with an accuracy of less than 2% in the velocity range from 2.17 to 5.80 km/s.
- 2012-09-25
著者
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Tamura Hideki
Department Of Anesthesia Hiroshima Red Cross & Atomic Bomb Survivors Hospital
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Kondo Ken-ichi
Materials And Structures Laboratory Tokyo Institute Of Technology
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Kishimura Hiroaki
Department Of Materials Science And Engineering National Defense Academy
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Nakamura Kazutaka
Materials And Structures Laboratory Tokyo Institute Of Technology
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Kondo Ken-ichi
Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Tamura Hideki
Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
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Saito Fumikazu
Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
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Yokote Hiroyuki
Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
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Yokoo Manabu
Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Kishimura Hiroaki
Department of Material Science and Engineering, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
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