A novel velocity measuring system for fragments based on retroreflective laser screen

作者：Zhao Donge^*; Zhou Hanchang

来源：International Symposium on Photoelectronic Detection and Imaging 2011 - Laser Sensing and Imaging and Biological and Medical Applications of Photonics Sensing and Imaging, 2011-05-24 To 2011-05-26.

DOI：10.1117/12.897878

• Laser screen
• retroreflective film
• fragments
• velocity
• non-contact measurement

The flying velocity of fragment is a key parameter to evaluate the damage power of warhead. Due to small volume, large amount, irregular shape, high velocity, arbitrary flying direction, wide distribution and serious measuring environment, it's very difficult to measuring the velocity of fragment. We adopt two fan-shaped laser screens combining with retroreflective cooperation objects to construct detect module, and break through the laser screen transmitting-receiving integration optoelectronic detection technique. The signals of the fragment flying through the screens are collected, saved and processed by software. The system can realize a real-time, non-contact, reproducible, all-weather optoelectronic measurement for fragment velocity during warhead explosion. Using the developed prototype, we successfully acquired the analog signals when five fragments flying through two laser screens for certain an explosion warhead, and obtained their velocities which can be regarded as instantaneous velocities at the midpoint between two screens. The result validates the accuracy of the method and its feasibility of engineering application.

• 出版日期2011
• 单位中北大学