机载激光雷达回波模拟设备的研究
发布时间：2018-08-02 17:22
【摘要】：近年来,机载激光雷达在军事应用中发挥着越来越重要的作用。激光雷达测距机的测程要求也逐渐向中远程发展,如何有效评估机载激光雷达的测距能力对激光雷达产品研发有着重要的意义。以往的评估方法主要针对激光雷达整体而言,测试设备成本高,灵活性差。随着激光雷达向数字化测距方向的发展,激光雷达信息处理能力也直接影响到测距能力,因此也成为性能评估的重要一环。目前还没有有效的手段在研发阶段就能对激光雷达的信息处理能力进行全面的测试,本文设计了一种机载激光雷达回波模拟设备,模拟真实测距过程中回波信号,用于对激光雷达的信号处理电路的测试。激光回波模拟设备采用上位机+采集转换电路的架构,上位机与采集转换电路之间通过USB接口传输数据。采集转换电路内包含了回波模拟设备的所有硬件电路,包括主控芯片FPGA、回波采集模块、回波模拟输出模块及USB数据传输模块的设计。其中,主控芯片FPGA实现整个系统工作流程的控制,回波采集模块通过AD转换采集真实的回波数据并通过USB接口传输给上位机保存,回波模拟输出模块将上位机通过USB接口传输的模拟回波数据通过DA转换输出,上位机采用VC++6.0实现了良好的人机交互界面,用于设置各项回波数据的参数,存储相关数据,配合采集转换电路实现各项功能。本文研究的激光雷达回波模拟设备能够采集并存储真实测距过程的回波数据,也能模拟静态目标测距过程中或动态目标测距过程的回波数据,并通过回放生成的模拟数据对激光雷达的信号处理电路进行测试。经过测试,该设备工作良好,易于操作,为激光雷达的信号处理能力的评估提供了一种有效的解决方案。
[Abstract]:In recent years, airborne lidar plays a more and more important role in military applications. The range requirement of laser radar rangefinder is also developing to the middle and long range. How to effectively evaluate the ranging capability of airborne lidar is of great significance to the research and development of lidar products. The previous evaluation methods are mainly aimed at lidar as a whole, the cost of testing equipment is high, and the flexibility is poor. With the development of lidar to digital ranging, the information processing ability of lidar has a direct impact on ranging capability, so it has become an important part of performance evaluation. At present, there is no effective means to test the information processing ability of lidar. In this paper, an airborne laser radar echo simulation equipment is designed to simulate the echo signal in the real ranging process. It is used to test the signal processing circuit of lidar. The laser echo analog device adopts the architecture of the acquisition and conversion circuit of the host computer. The data is transmitted between the upper computer and the acquisition and conversion circuit through the USB interface. The acquisition and conversion circuit includes all the hardware circuits of the echo analog device, including the design of the main control chip FPGA, the echo acquisition module, the echo analog output module and the USB data transmission module. Among them, the main control chip FPGA realizes the control of the whole system work flow. The echo acquisition module collects the real echo data through AD conversion and transmits it to the upper computer through the USB interface. The echo simulation output module outputs the analog echo data transmitted by the host computer through USB interface through DA conversion. The host computer realizes a good man-machine interface with VC 6.0, which is used to set the parameters of the echo data and store the relevant data. With the acquisition conversion circuit to achieve the various functions. The laser radar echo simulation equipment studied in this paper can collect and store the echo data of the real ranging process, and can also simulate the echo data of the static target ranging process or the dynamic target ranging process. The signal processing circuit of lidar is tested by the simulated data generated by playback. The test results show that the equipment works well and is easy to operate, which provides an effective solution for the evaluation of the signal processing ability of lidar.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN958.98
本文编号：2160141
[Abstract]:In recent years, airborne lidar plays a more and more important role in military applications. The range requirement of laser radar rangefinder is also developing to the middle and long range. How to effectively evaluate the ranging capability of airborne lidar is of great significance to the research and development of lidar products. The previous evaluation methods are mainly aimed at lidar as a whole, the cost of testing equipment is high, and the flexibility is poor. With the development of lidar to digital ranging, the information processing ability of lidar has a direct impact on ranging capability, so it has become an important part of performance evaluation. At present, there is no effective means to test the information processing ability of lidar. In this paper, an airborne laser radar echo simulation equipment is designed to simulate the echo signal in the real ranging process. It is used to test the signal processing circuit of lidar. The laser echo analog device adopts the architecture of the acquisition and conversion circuit of the host computer. The data is transmitted between the upper computer and the acquisition and conversion circuit through the USB interface. The acquisition and conversion circuit includes all the hardware circuits of the echo analog device, including the design of the main control chip FPGA, the echo acquisition module, the echo analog output module and the USB data transmission module. Among them, the main control chip FPGA realizes the control of the whole system work flow. The echo acquisition module collects the real echo data through AD conversion and transmits it to the upper computer through the USB interface. The echo simulation output module outputs the analog echo data transmitted by the host computer through USB interface through DA conversion. The host computer realizes a good man-machine interface with VC 6.0, which is used to set the parameters of the echo data and store the relevant data. With the acquisition conversion circuit to achieve the various functions. The laser radar echo simulation equipment studied in this paper can collect and store the echo data of the real ranging process, and can also simulate the echo data of the static target ranging process or the dynamic target ranging process. The signal processing circuit of lidar is tested by the simulated data generated by playback. The test results show that the equipment works well and is easy to operate, which provides an effective solution for the evaluation of the signal processing ability of lidar.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN958.98
【参考文献】
相关期刊论文 前2条
1 曾嫦娥;王茜劏;常岗;单长胜;王强;;脉冲激光测距机最大测程测试方法研究[J];红外与激光工程;2005年06期
2 孙斌,王小兵,林轶,万强,卢常勇,郭延龙;无靶板消光比法检测激光测距能力的研究[J];激光技术;2004年01期
，本文编号：2160141
本文链接：https://www.wllwen.com/kejilunwen/wltx/2160141.html
