机载双频激光雷达样机设计与水陆联测试验

为了识别水下目标和获取水陆一体的三维地形数据,运用机载双频激光探测的原理,建立了水陆联测数学模型,设计了机载双频激光雷达样机,进行了水陆联测试验。运用蓝绿激光扫描技术以实现水下地形的实时测绘,运用红外激光扫描技术以实现陆地目标的快速精细探测,采用机载双频激光雷达技术把蓝绿激光扫描技术与红外激光扫描技术进行结合,先后产生两个激光脉冲回波,结合飞行平台的一维运动,共同构建地表和海底表面的三维坐标点云,获取地表和海底的三维地形,实现水下目标的识别和水陆一体化量测。试验结果显示,每平方米地面点云数量达到12个,水下勘测点云数量达到2~4个,水下测深达到5~7米,既提高了陆地目标的探测精度又实现了水下目标的探测,验证了水陆联测系统的可行性。

Prototype design and water-land joint survey test of airborne dual-frequency lidar

To realize underwater target recognition and aquire water-land 3d terrain data, uses the airborne dual frequency laser detection principle was used, the mathematical model of water and land surveying established, double-frequency laser radar principle prototype was designed, and land surveying experiment was conducted. Blue green laser scanning technology was used to realize the real-time surveying and mapping of underwater terrain, infrared laser scanning technology used to achieve the rapid detection ofland data, and blue green laser scanning technology and infrared laser scanning technology were combined with airborne dual frequency laser radar technology. The three-dimensional terrain of the surface and the sea floor was obtained by combining three-dimensional coordinate point cloud of surface and submarine surface with one-dimensional motion of flight platform. Underwater target identification and integration of land and water measurement were realized. Calculation results show that the per square meter ground point cloud amounts to 12, underwater survey number of point cloud reaches 2 to 4, and underwater bathymetry can reach 5 to 7 meters, which not only improves the detection of land targets precision and underwater target detection, but also verifies the feasibility of the system.