Design and application of synchronous trigger light sources for high-speed photography

LIANG Haijian; DENG Jun; WANG Gao; JIAO Ning; LI Yangjun; GUO Yafei

doi:10.7510/jgjs.issn.1001-3806.2016.03.006

In order to solve the missing projectile under high-speed photography which caused by short time, harder synchrotron and low-light-level, a synchronous trigger light source system was designed. A high brightness light-emitting didoe(LED) array controlled by the field-programmable gate array was used as light source. The simulation of LED array by MATLAB software shows that the maximum intensity of the light source array can reach 9104 Lux one meter away from the center position of light source. In the experiment, the camera is triggered when the projectile leaves the muzzle. At the same time, the camera outputs a synchronous trigger signal to trigger the lighting system. The results show that, the bullet charge is 0.15g and the camera frame rate is 5000frame/s. Collide speed is about 100m/s. Experiment results demonstrate that the synchronous trigger system has an effective improvement of the illumination intensity and the degree of synchronization. This study is helpful to improve the projectile testing technology.

Design and application of synchronous trigger light sources for high-speed photography

Corresponding author: WANG Gao, 917978149@qq.com;

1. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;

2. Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Educations, North University of China, Taiyuan 030051, China;

3. No. 208 Research Institute, China Ordnance Industries, Beijing 102202, China

Received Date: 2015-04-14

Accepted Date: 2015-05-19

Available Online: 2016-05-25

Abstract: In order to solve the missing projectile under high-speed photography which caused by short time, harder synchrotron and low-light-level, a synchronous trigger light source system was designed. A high brightness light-emitting didoe(LED) array controlled by the field-programmable gate array was used as light source. The simulation of LED array by MATLAB software shows that the maximum intensity of the light source array can reach 9104 Lux one meter away from the center position of light source. In the experiment, the camera is triggered when the projectile leaves the muzzle. At the same time, the camera outputs a synchronous trigger signal to trigger the lighting system. The results show that, the bullet charge is 0.15g and the camera frame rate is 5000frame/s. Collide speed is about 100m/s. Experiment results demonstrate that the synchronous trigger system has an effective improvement of the illumination intensity and the degree of synchronization. This study is helpful to improve the projectile testing technology.

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Reference (16)

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Design and application of synchronous trigger light sources for high-speed photography

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