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本文介绍一种新的高速动态图像的采集技术,它采用红宝石双脉冲激光器作光源,利用普通的图像处理设备,对受冲击载荷作用下的模型,在应力波传播过程中,可采集到光脉冲宽度在30～50毫微秒内的动态图像.本文详细介绍了该采集系统的采图原理以及对模型加载、双脉冲激光器的触发、延时和采图之间的时序和同步关系,并给出了模型受冲击载荷后,延时为30,40,50,60,70,80,90,100μs 时的光弹性等差线条纹图的快速采集实例.
This paper introduces a new high-speed dynamic image acquisition technology, which uses ruby dual-pulse laser as a light source, the use of common image processing equipment, under the impact load of the model, the stress wave propagation process, you can capture the light pulse The width of 30 ~ 50 nanosecond dynamic images.This paper describes in detail the acquisition principle of the acquisition system and the model loading, double pulse laser trigger, delay and timing between the acquisition and synchronization, and to An example of rapid acquisition of photoelastic contour lines with delay time of 30, 40, 50, 60, 70, 80, 90 and 100 μs after the model is subjected to impact load is given.