Detecting target velocity and location using a novel optoelectronic sensing system

Chi Ching Chang

doi:10.1117/12.571804

6 December 2004 Detecting target velocity and location using a novel optoelectronic sensing system

Chi Ching Chang

Proceedings Volume 5612, Electro-Optical and Infrared Systems: Technology and Applications; (2004) https://doi.org/10.1117/12.571804
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

We propose a cost-effective, compact, and robust optoelectronic sensing system for measuring ballistic impact velocity and distribution of the projectile motion. The key elements consisted of this system are four photo-gates hybridized by compound one-dimensional prism array and analog/digital electronic components. The number of light sources and photodetectors used in a photo-gate was reduced to one pair of that. The time interval passing each pair can be measured precisely (~10^-8 s). The average velocity and location of projectile are carried out according the measured time intervals. The system can precisely measure the velocity of a bullet as it leaves a gun barrel and the velocity toward the trajectory outside the firearm. Furthermore, the system uses a commonly found low-powered laser pointer as light source. Compared with other optoelectronic sensing systems that use high-powered lasers, our system is both economical and safe.

Citation Download Citation

Chi Ching Chang "Detecting target velocity and location using a novel optoelectronic sensing system", Proc. SPIE 5612, Electro-Optical and Infrared Systems: Technology and Applications, (6 December 2004); https://doi.org/10.1117/12.571804

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