中国激光, 2019, 46 (7): 0701003, 网络出版: 2019-07-11
水下高重复频率脉冲激光全选通成像雷达对比度信噪比模型 下载: 916次
Contrast Signal-to-Noise Ratio Model of Underwater Full Range-Gated Imaging Radar Based on High-Repetition-Rate Pulse Laser
海洋光学 对比度信噪比 高重复频率激光成像系统 成像雷达 oceanic optics contrast signal-to-noise ratio high-repetition-rate laser imaging system imaging radar
摘要
为了评价高重复频率系统在每个选通切片中的成像质量,为脉冲分配策略的研究提供依据,在Jaffe-McGlamery模型的基础上,建立描述高重复频率系统信号传输过程的理论模型,分析图像退化因素,提出一种高重复频率系统成像质量评价模型。采用重复频率为4 kHz的脉冲激光器,对黑白条纹靶板目标进行成像。实验结果表明,从目标开始成像到出现饱和前的线性区间内,该理论模型的结果与实验结果相吻合,误差不超过10%。
Abstract
In order to evaluate the imaging quality of a high-repetition-rate system in each gated slice and provide fundamental elements for the study of pulse allocation strategy, a theoretical model describing the signal transmission process of the high-repetition-rate system is established based on the Jaffe-McGlamery model, and the factors of image degradation are analyzed. Specifically, an image quality evaluation model of the high-repetition-rate system is proposed herein. Experimentally, a pulsed laser having a repetition rate of 4 kHz is used to image a black-and-white stripe target. Results show that measured values of the experimental image fit well with the calculated values of the model on a linear range from the beginning of the target imaging to the occurrence of saturation, with an estimated error not exceeding 10%.
王银飞, 张晓晖, 钟炜, 韩宏伟. 水下高重复频率脉冲激光全选通成像雷达对比度信噪比模型[J]. 中国激光, 2019, 46(7): 0701003. Yinfei Wang, Xiaohui Zhang, Wei Zhong, Hongwei Han. Contrast Signal-to-Noise Ratio Model of Underwater Full Range-Gated Imaging Radar Based on High-Repetition-Rate Pulse Laser[J]. Chinese Journal of Lasers, 2019, 46(7): 0701003.