| With the increase of highway vehicle flow,the demand for traffic supervision is also increasing.Highway vehicle monitoring radar can real-time detect highway traffic,statistics automobile flow,track vehicle driving information,and effectively enhance the management and operation level of highway.In this paper,combined with a highway vehicle monitoring radar project,the overall design of the radar system,theoretical research and validation of processing algorithms,communication scheme design and interface debugging of the system,DSP software implementation of the algorithm and system function debugging are studied and discussed in detail.Firstly,the research of radar point and track processing algorithm is carried out.In order to improve the performance of target spot detection in clutter environment,the CFAR detection algorithm is studied to filter out clutter,maintain a constant false alarm probability,simulate and compare the specific effects of several CFAR algorithms,and select a threshold calculation method with large average cells on both sides to improve the edge effect.For target point trace extension,the target point trace aggregation algorithm for contour segmentation of connected domain is studied,and the simulation results are given to verify the accuracy of the aggregation.At the same time,the track processing algorithm of the target is studied to get the track of the target,and the start,association,filtering module algorithm of the target track tracking is analyzed.The Kalman filter algorithm based on Singer motion model is selected.The track association algorithm of the nearest neighbor and the track initiation algorithm combining intuitive and logical methods are given,and the simulation is completed.At the same time,for the speed blurring problem of vehicle target detection,a speed blurring algorithm based on target track tracking is presented,and the accuracy of target track acquisition and target speed estimation is verified by simulating the complete target track processing process.Then it is the communication scheme design and debugging of the main interface of the radar system.Due to the need of high-speed transmission of radar data and real-time report of target results,the overall communication scheme of the radar system is analyzed and designed.The interrupt setup method of GPIO interface of DSP,the configuration of SRIO interface and Ethernet interface and the software implementation method are mainly introduced.The data transfer of SRIO interface between DSP and FPFA is debugged,and the transfer rate is11.27 Gbps.The data transfer rate of the Ethernet interface between the DSP and the upper computer is 605 Mbps,which meets the requirements of real-time communication.Finally,the software implementation and hardware debugging of the processing algorithm of the DSP platform are presented.A 7-core processing scheme based on SYS/BIOS real-time operating system is proposed.Variable design and software flow of single accounting task are given.EDMA is used to carry data to improve efficiency,and Message Q message queue is used to achieve multi-core communication,which solves the cache consistency problem.The memory resource consumption and running time of DSP multi-core are analyzed to ensure the reasonable memory allocation and meet the real-time requirements of target information reporting.For the system debugging of the radar system,simulate the radar return target points,debug the processing modules of point and track processing on the DSP platform,and system control modules such as inter-core communication,interface,etc.The consistency of the processing results with the simulated target information verifies the correctness and stability of the system function.The point and track processing algorithm of the vehicle surveillance radar and the DSP multi-core implementation scheme studied in this paper can complete the detection of target information of high-speed vehicles,and ensure the accuracy and reliability of continuous real-time monitoring. |
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