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在深海目标探测中,蓝绿激光雷达发出的激光受到水体的后向散射,回波信号对比度下降严重,无法满足水下目标探测应用的要求。载波调制激光雷达水下目标探测技术能够有效抑制海水后向散射,提高目标对比度。利用计算机仿真载波调制激光雷达水下目标探测系统,通过仿真系统模拟回波信号,然后对比回波信号中激光信号和微波信号的目标对比度,并分析系统内外部参数对回波信号的影响。仿真结果说明:在深海目标探测中,载波调制激光雷达技术对探测效果有明显改善,海水参数和调制参数对探测性能有较大影响。
In the deep sea target detection, the laser emitted by the blue-green laser radar is backscattered by the water body and the contrast of the echo signal drops seriously, which can not meet the requirements of the underwater target detection application. Carrier modulated lidar underwater target detection technology can effectively inhibit the backscattering of seawater to improve the target contrast. The simulation system is used to simulate the echo signal by using the computer simulation carrier modulation laser radar underwater target detection system. Then the target contrast of the laser signal and the microwave signal in the echo signal is compared, and the influence of the system internal and external parameters on the echo signal is analyzed. The simulation results show that in the deep sea target detection, the carrier modulation lidar has a significant improvement on the detection effect, and the seawater parameters and the modulation parameters have a greater impact on the detection performance.