基于虚拟显存的雷达显控系统设计

针对普通X86平台下硬件图形处理器不支持多层图像显示功能的情况,考虑现有雷达图像显示方法不适合实现雷达多种信息分层显示的问题,提出在Linux系统下使用内存模拟显存并结合Qt图形视图框架和OpenGL像素操作接口的方法,实现雷达信息分层与高效图像显示.该方法能有效实现雷达显控的主要功能:雷达平面位置显示(plan position indicator,PPI)、警戒区域目标闪烁及船舶自动识别系统(automatic identification system,AIS)目标管理与显示.测试结果表明,该方法具有显示效率高、图像刷新流畅及硬件要求低等优点,该系统已成功应用于某型号船载雷达系统.

Design of radar display and control system based on virtual memory

Since the graphics processor of ordinary X86 platform does not support the display function of multi-layer graphics, the paper discussed the problem of using existing radar display method to achieve layered display with a variety of radar information, and suggested a way that uses memory as the graphics memory under Linux system, combining with Qt graphics-view framework and OpenGL pixels operation function, to realize layered and efficient display with radar information. This method can effectively realize the main functions of radar display and control system which contains radar plan position indicator (PPI) display, target glint in warning area, management and display of automatic identification system(AIS) target. The results show that this drawing method is of high efficiency with smooth image update, and it has low hardware requirements. Meanwhile, the proposed system has been successfully applied to a kind of shipborne radar.