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首页> 外文期刊>Nature reviews Cancer >Research on Target Deviation Measurement of Projectile Based on Shadow Imaging Method in Laser Screen Velocity Measuring System
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Research on Target Deviation Measurement of Projectile Based on Shadow Imaging Method in Laser Screen Velocity Measuring System

机译：基于激光屏速度测量系统射影成像方法的射弹射伤目标偏差测量研究

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In the laser screen velocity measuring (LSVM) system, there is a deviation in the consistency of the optoelectronic response between the start light screen and the stop light screen. When the projectile passes through the light screen, the projectile's over-target position, at which the timing pulse of the LSVM system is triggered, deviates from the actual position of the light screen (i.e., the target deviation). Therefore, it brings errors to the measurement of the projectile's velocity, which has become a bottleneck, affecting the construction of a higher precision optoelectronic velocity measuring system. To solve this problem, this paper proposes a method based on high-speed shadow imaging to measure the projectile's target deviation, Delta S, when the LSVM system triggers the timing pulse. The infrared pulse laser is collimated by the combination of the aspherical lens to form a parallel laser source that is used as the light source of the system. When the projectile passes through the light screen, the projectile's over-target signal is processed by the specially designed trigger circuit. It uses the rising and falling edges of this signal to trigger the camera and pulsed laser source, respectively, to ensure that the projectile's over-target image is adequately exposed. By capturing the images of the light screen of the LSVM system and the over-target projectile separately, this method of image edge detection was used to calculate the target deviation, and this value was used to correct the target distance of the LSVM to improve the accuracy of the measurement of the projectile's velocity.
机译：在激光屏风速度测量（LSVM）系统中，在起始光屏和止动屏幕之间的光电响应的一致性存在偏差。当射弹通过光屏幕时，射弹的过目标位置，在该射弹的过目标位置，在该射击LSVM系统的定时脉冲偏离光屏的实际位置（即，目标偏差）。因此，它为射弹速度的测量带来了误差，这已成为影响更高精密光电子速度测量系统的瓶颈。为了解决这个问题，本文提出了一种基于高速阴影成像的方法来测量弹丸的目标偏差，当LSVM系统触发定时脉冲时的目标偏差。红外脉冲激光通过非球面透镜的组合准直，以形成用作系统的光源的平行激光源。当射弹通过光屏时，弹丸的过目标信号由专门设计的触发电路处理。它使用该信号的上升和下降边缘分别触发相机和脉冲激光源，以确保射弹的过目标图像充分暴露。通过分别捕获LSVM系统的光屏和过度目标射弹的图像，使用这种图像边缘检测方法来计算目标偏差，并且该值用于校正LSVM的目标距离来改善测量射弹速度的准确性。

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