Velodyne Acoustics HDL-64E S2.1 user manual APPendix e data PacKet forMat, Data Packet Format

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aPPendix e: data PacKet forMat

HDL-64E S2 and S2.1 User’s Manual

Data Packet Format

The sensor outputs UDP Ethernet packets. Each packet contains a header, a data payload of firing data and status data. Data packets are assembled with the collection of all firing data for six upper block sequences and six lower block sequences. The upper block laser distance and intensity data is collected first followed by the lower block laser data. The data packet is then combined with status and header data in a UDP packet transmitted over Ethernet. The data packet is transmitted starting with the last byte acquired in a last in, first out (LIFO) data order.

The status data always contains a GPS 4 byte timestamp representing microseconds from the top of the hour. In addition, the status data contains one type of data. The other status data rotates through a sequence of different pieces of information. See datagram on the next page.

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Contents

HDL-64E S2 and S2.1 E R ’ S M a N U a L a N DReading Calibration and Sensor Parameter Data Front/Back Mounting Side Mounting Top Mounting WiringBox Last Six Bytes ExamplesPage Box IntroductionS2.1 PrinciPLes of oPeration HDL-64E S2 design overviewInstaLLation oVerVieW Front/Back MountingSide Mounting Side HDL mounting illustrationTop Mounting Top HDL mounting illustrationUse the Included Point-cloud Viewer WiringUsaGe Develop Your Own Application-specific Point-cloud ViewerParameter Unit Description Values Establish communication with the sensorDb.xml Calibration Parameters Sample SERCMD.txt file Change Run-Time ParametersSample Batch File .bat Available commands Command Description ParametersControl Spin Rate Limit Horizontal FOV Data CollectedUpload Calibration Data Define Sensor Memory IP Source and Destination AddressesDestination External GPS Time SynchronizationGPS Equipment GPS Connection Timestamp Info Accuracy Packet Format and Status Byte for GPS Time StampingTime Stamping Accuracy Rules Laser Firing Sequence and TimingFirMWare uPdate HDL software update screen captureIsometric View APPendix a MechanicaL draWinGsAPPendix B WirinG diaGraM Digital Sensor Recorder DSR InstallAPPendix c diGitaL sensor recorder dsr APPendix c diGitaL sensor recorder dsr Click the Record button Shift Zoom Axis Rotation RotationalAPPendix d MatLaB saMPLe code APPendix d MatLaB saMPLe code Status Type Ascii Value Interpretation and Scaling APPendix e data PacKet forMat Data Packet FormatFirmware version 4.07 sheet 1 Firmware version 4.07 sheet 2 Firmware version 4.07 sheet 3 Last Six Bytes Examples 40 = Ver Packet #7657 Packet #7658Coordinate Calculation Algorithm Sample Code APPendix f duaL tWo Point caLiBration MethodoLoGyDual Two Point Calibration Methodology and Code Samples APPendix f duaL tWo Point caLiBration MethodoLoGy Intensity Value Corrected by Distance Code Intensity Compensation vs DistanceCalibration Window APPendix f duaL tWo Point caLiBration MethodoLoGy APPendix G ethernet transit tiMinG taBLe HDL-64E Ethernet Timing Table OverviewHow to use this table The table represents a sensor Laser Numbers 0-7 & 32-39 Lower,UpperAPPendix h Laser and detector arranGeMent APPendix i anGuLar resoLution RPM RPSSerVice and Maintenance TrouBLeshootinGProblem Resolution SPecifications Velodyne LiDAR, Inc