Design of Photoelectric Velocity Measurement System for Warhead Fragment
The flight speed of warhead fragments is an important parameter to reflect its performance index.Aiming at the prob-lems in warhead fragment velocity parameter tests,such as high test environment requirement,small test area,equipment structure easy to be damaged by fragment mishit,and high cost,a contactless warhead fragment photoelectric velocity measurement system is designed,which includes the original reflection film,reflection photoelectric detection device,photoelectric conversion circuit,signal processing circuit,and velocity measurement device.This paper describes the system structure and velocity measurement principle,the obtained light signal is converted into the electrical signal through the reflective photoelectric detection device and photoelectric conversion circuit.The integrated signal processing circuit is used to filter,amplify,compare,and process the electrical signal.The speed measuring device is composed of FPGA,STM32,and other peripherals,which automatically processes the data output and dis-plays the flight speed results of warhead fragments.The experimental results show that the system can reliably and stably complete the measurement task of warhead fragmentation velocity.Compared with traditional speed measurement systems,it has the advanta-ges of not limitation to environments,large test area,easy maintenance,low cost,simple operation and so on.
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