Vibration, repeated impacts, rapid motion, and temperature swings can corrupt inertial measurements on UAVs, legged robots, and autonomous ground vehicles. HBK's MicroStrain 3DM-CX7 series is a family of compact inertial sensors that provides attitude, heading, and aided navigation data using a redundant multi-IMU architecture that cross-checks readings in real time and rejects outliers. The result is dependable motion estimation under shock, vibration, and rapid movement on size- and weight-constrained platforms.

The series comes in three configurations:

• The 3DM-CX7-AR provides roll, pitch, and relative heading where magnetic heading is impractical, such as in industrial AGVs and legged robots.
• The 3DM-CX7-AHRS adds an integrated three-axis magnetometer for absolute magnetic heading on UAVs and legged robots operating under vibration and rapid motion.
• The 3DM-CX7-INS combines inertial measurements with external position, velocity, and heading inputs for more advanced navigation estimation.

Features:

• Gyro bias instability: 2.1°/h
• Measurement ranges: up to ±32 g and ±4,000°/s
• Input voltage: 3.2 to 5.2V DC
• Output rate: up to 1 kHz
• Weight: 0.29 oz (8.3 g)
• Operating temperature: -40° to 185°F (-40° to 85°C)
• 3DM-CX7-AR: roll, pitch, and relative heading
• 3DM-CX7-AHRS: integrated three-axis magnetometer for absolute magnetic heading
• 3DM-CX7-INS: combines inertial data with external position, velocity, and heading inputs
• Auto-adaptive Extended Kalman Filter
• Each unit individually calibrated across the full operating temperature range
• ROS and PX4 support
• MSCL API and MIP SDK with documented interfaces and example code
• InertialConnect and SensorConnect software for configuration, parameter adjustment, data collection, and visualization
• Dependable attitude and motion estimation under shock, vibration, and rapid movement

MicroStrain by HBK (Hottinger Brüel & Kjær)
Williston, VT
(800) 332-2040
hbkworld.com