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LORD MicroStrain Adds Mini Inertial Sensors with MEMS Technology
Gyroscopes, pressure altimeters, accelerometers and Kalman filters among the features.
By Robotics Trends Staff - Filed May 22, 2014
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LORD MicroStrain has introduced the 3DM-GX4 family of miniature 10°/hour inertial sensors using MEMS sensor technology.

The 3DM-GX4-15 Inertial Measurement Unit (IMU) and 3DM-GX4-25 Attitude Heading Reference System (AHRS) feature tri-axial accelerometers and gyroscopes plus an onboard Adaptive Kalman Filter. In addition, the GX4-25 also includes tri-axial magnetometers and a pressure altimeter.

The 3DM-GX4-45 Inertial Navigation System (INS) features an onboard pressure altimeter and tri-axial accelerometers, gyros, and magnetometers. It also includes an Extended Kalman Filter and GPS to generate optimal inertial and attitude estimates.

The entire GX4 family is among the smallest and lightest in its class; the GX4-15 and -25 weigh only 16.5 grams, and the GX4-45 weighs 20 grams. Each sensor features dual processors, 10°/hour gyro bias stability, and is fully calibrated and temperature-compensated, helping each produce high performance under vibration and dynamic conditions.

"The 3DM-GX4 family's 10°/hour gyro bias stability and industrial grade MEMS sensors clearly set them apart in the field of miniature inertial sensor systems," said Fritz Martin, LORD MicroStrain Engineering Manager of Inertial Products.

"This quality of AHRS sensing in the GX4-25 has never been available in such a small and lightweight package before," Martin said. "These are the perfect sensing solutions across multiple industries, particularly those utilizing small-scale, lightweight systems where ruggedness and accuracy have not been available previously."

The 3DM-GX4 family of sensors has applications across a wide variety of industries and disciplines. They are suited for camera and platform stabilization, antenna pointing, autopilot operation in lightweight vehicles, and industrial attitude and position sensing.

The 3DM-GX4 family's architecture was designed to substantially eliminate common sources of error such as hysteresis induced by temperature changes and sensitivity to supply voltage variations. Gyro drift is extremely low and, through a variety of estimation techniques, the GX4 sensors can approach near-tactical performance in many applications.

The system is drop-in compatible with LORD MicroStrain's GX3 family. The 3DM-GX4-15, -25, and -45 are each available in a starter kit consisting of its respective module, RS-232 or USB communication and power cable, software CD, user manual, and quick-start guide.

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