Combined GPS & Inertial Navigation Testing
Using an IMU with LabSat will enable you to record inertial data, synchronised with the LabSat GPS data. This can then be replayed to test GPS + Inertial systems. Using the Labsat interface modules, it is possible to sample data streams from Inertial Sensors with RS-232, RS-485 or CAN Bus outputs. Racelogic IMUHousing three MEMs yaw rate sensors and three MEMs G-sensors, the Racelogic IMU can measure inertial data at high accuracy. The Yaw sensors can measure ±150º/s, at 0.01 º/s resolution, whilst the G-sensor accelerometers can measure ±1.7g at 0.002g resolution. Fully configurable, the IMU is constructed with a splash-proof casing which is rated to a limited ingress IP rating of IP65, making it ideal for use in a variety of environments. Using the IMU with LabSatThe Racelogic IMU is a stand-alone 6DOF sensor with CAN Bus data output. The CAN Bus protocol, requires that at least two nodes are present on the bus and that appropriate terminating resistors are fitted between CAN High and CAN Low. Therefore, the Racelogic IMU must be used in conjunction with another node (for example a CAN Bus analyser) which will send CAN acknowledge signals to the IMU. The Racelogic LS01 CAN Bus interface module does not form and active node on the CAN Bus but will capture bus activity, allowing the LabSat to record the CAN Bus data from the IMU in synchronisation with the GPS signal. During replay of the GPS signal, the LS01 module will re-create the CAN Bus data for use by the equipment under test.
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