Integrated Devices Archives - Inside GNSS

Integrated Devices

October 9, 2007

Xsens Integrated GPS-IMU Unit

Xsens Technologies has launched a GPS-enhanced IMU, the MTi-G. The device incorporates an integrated 16-channel GPS and MEMS inertial measurement unit with an internal ultra low-power attitude and heading reference system (AHRS) processor running a real-time Kalman filter, the unit provides accurate positioning (2.5 meters CEP, autonomous), velocity, acceleration, and orientation estimates, with a high update rate (4 Hz GPS, 512 Hz inertial).

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By Glen Gibbons
September 19, 2007

u-blox GPS-Dead Reckoning Module

The LEA-4R from u-blox is a small dead reckoning GPS module powered by the 16-channel ANTARIS 4 engine. Dead reckoning works by combining GPS satellite position data, gyroscope data (that measures angle turns) and odometer data (that measures distance covered) to calculate a position. The module incorporates the Epson XV-8000-CB gyroscope with a 40 Hz calculation rate and provides a one-second (1 Hz) position update rate. The combination of technologies supports continuous navigation in locations with poor or absent GPS such as tunnels, indoor parking facilities, and deep urban canyons.

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By Glen Gibbons