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Inertia-Link®

Submitted by scott on

Inertia-Link®

Inertial Measurement Unit/IMU and Vertical Gyro

Overview

Inertia-Link® is a high-performance Inertial Measurement Unit and Vertical Gyro utilizing miniature MEMS sensor technology. It combines a triaxial accelerometer, triaxial gyro, temperature sensors, and an on-board processor running a sophisticated sensor fusion algorithm.

Inertia-Link® offers a range of output data quantities from fully calibrated inertial measurements (acceleration & angular rate or deltaAngle & deltaVelocity vectors) to computed orientation estimates (pitch & roll or rotation matrix). All quantities are fully temperature compensated and corrected for sensor misalignment. The angular rate quantities are further corrected for G-sensitivity and scale factor non-linearity to third order.

Inertia-Link's communications interface hardware is contained in a separable module, and can therefore be easily customized. Currently available interface modules include a wireless transceiver, USB 2.0, RS232 and RS422. An OEM version is available without the communications interface enabling the sensor to be integrated directly into a host system's circuitboard, providing a very compact sensing solution.

The 3DM-GX2® Software Development Kit (SDK) provides application builders with robust protocols and source code samples to operate the Inertia-Link® and 3DM-GX2® orientation sensors. The SDK includes a complete Data Communications Protocol manual, a detailed Users manual, ANSI C Implementation and API. Sample applications demonstrating many protocol commands are provided with fully-commented source code for Microsoft® Visual Studio C++ 2003/2008 Express, LabVIEW® 7.1.1, Microsoft® Visual Studio Visual Basic 2005 and Microsoft® Visual Basic 6.0.

Inertial-Link IMU Orientation Sensor
Applications
  • Inertial aiding INS and GPS, location tracking
  • Unmanned vehicles, robotics - navigation, artificial horizon
  • Computer science, biomedical - animation, linkage free tracking/control
  • Platform stabilization
  • Antenna and camera pointing
  • small, light-weight, low-power design ideal for size-sensitive applications including wearable devices
  • fully temperature compensated over entire operational range
  • calibrated for sensor misalignment, gyro G-sensitivity, and gyro scale factor non-linearity
  • simultaneous sampling for improved time integration performance
  • available with wireless and USB communication interfaces
  • user adjustable data rate (1 to 250Hz) and sensor bandwith (1 to 100Hz)
  • outputs include Euler angles, rotation matrix, deltaAngle & deltaVelocity, acceleration and angular rate vectors
Orientation Range (pitch, roll, yaw) 360˚ about all axes
Accelerometer range Accelerometers: ± 5 g standard, ± 18 g and ± 1.7 g also available
Accelerometer bias stability ± 0.010 g for ± 18 g range
± 0.005 g for ± 5 g range
± 0.003 g for ± 1.7 g range
Accelerometer nonlinearity 0.2%
Gyro range Gyros: ± 300°/sec standard, ± 1200°/sec, ± 600°/ sec, ± 50°/sec also available
Gyro bias stability ± 0.2˚/sec for ± 300˚/sec
RF Output Power 0dBm (1 mW)
Gyro nonlinearity 0.2%
A/D resolution 16 bits
Orientation Accuracy ± 0.5˚ typical for static test conditions ± 2.0˚ typical for dynamic (cyclic) test conditions and for arbitrary orientation angles
Orientation Resolution <0.1˚ minimum
Repeatability 0.20˚
Output modes Acceleration and angular rate, deltaAngle and deltaVelocity, Euler angles, rotation matrix
Interface options RS232, RS422, USB 2.0 and wireless - 2.45 GHz IEEE 802.15.4 direct sequence spread spectrum, license free worldwide (2.450 to 2.490 GHz) - 16 channels
Wireless communication range 70 m
Digital output rates Standard RS-232, USB or RS-422 interface: Up to 237Hz Wireless interface: Up to 100Hz OEM or custom interface: Up to 1000Hz
Serial data rate 115200 bps
Supply voltage +4.5 to +16 volts DC
Power consumption 90 mA
Connectors micro DB9
Operating temperature -40 to +70˚C with enclosure
-40 to +85˚C without enclosure
Dimensions 41 mm x 63 mm x 24 mm with enclosure 32 mm x 36 mm
x 15 mm without enclosure
Weight 39 grams with enclosure, 16 grams without enclosure
Shock limit 1000 g (unpowered), 500 g (powered)

*Accuracy and stability specifications obtained over operating temperatures of -40 to 70˚C with known sine and step inputs, including angular rates of ± 300˚ per second.

Patents pending.

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How To Order

To discuss configuration for your specific system requirements, please contact sales at sales@microstrain.com or call  802-862-6629.

For large quantity orders or OEM discussions, please contact mirobinson@microstrain.com.

If you are outside the US, please contact one of our distributors.