基于USB总线的机载多脉冲激光雷达产品测试系统研制

Development of Airborne Multiple Impulse Laser Radar Test System Based on USB

摘要:

针对现有的机载激光雷达产品测试系统不能模拟特定信噪比,且系统使用复杂的问题,开发了基于USB总线的机载多脉冲激光雷达产品测试系统;测控软件可以设定信噪比、脉冲幅值、脉冲周期等参数,并根据静态测距和动态测距的实际需要,生成静态和动态模拟数据;另外,测试系统还能够采集外场数据,并在测控计算机上存储和分析;采集和生成的数据经过USB总线发送给基于FPGA+高速D/A转换器架构的数据转换器,再输出给激光雷达产品,保证了数据传输的高速性和灵活性;经过测试表明,信噪比在3~9的情况下,产生回波信号的距离误差控制在1%以内,信号幅值误差控制在0.5%以内;测试系统的各项指标都满足实际需要,为激光雷达产品调试提供了良好的模拟仿真平台。

Abstract:

Because the existing testing system of airborne laser radar products can not set signal-to-noise ratio and is complex, Laser radar product test system for airborne pulse is developed based on USB bus. Monitoring software can set signal to noise ratio, pulse amplitude, pulse cycle parameters, and generate static and dynamic simulation data according to the actual needs of static and dynamic range. In addition, the test system can acquire field data, and store in the control computer. Acquisition and generation of data through the USB bus are sent to data converter based on FPGA+ high speed D/A converter architecture, then are output to laser radar products, which ensure the fast and flexible data transmission. Test result show that in the case of 3~9 SNR the echo signal distance error is controlled within 1% and the amplitude of the signal error is controlled within 0.5%. testing system can meet the actual needs, provide a good platform for simulation of laser radar products debug.