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3DM-GX2®

3DM-GX2 AHRS Orientation Sensor

Attitude Heading Reference System (AHRS)

3DM-GX2® is a high-performance gyro enhanced orientation sensor which utilizes miniature MEMS sensor technology. It combines a triaxial accelerometer, triaxial gyro, triaxial magnetometer, temperature sensors, and an on-board processor running a sophisticated sensor fusion algorithm.

3DM-GX2® offers a range of output data quantities from fully calibrated inertial measurements (acceleration, angular rate and magnetic field 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.

3DM-GX2®'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 system architecture has been carefully designed to substantially eliminate common sources of error such as hysteresis induced by temperature changes and sensitivity to supply voltage variations. The use of six independent Delta-Sigma A/D converters (one for each sensor) ensures that all sensors are sampled simultaneously, and that the best possible time integration results are achieved. On-board coning and sculling compensation allows for use of lower data output rates while maintaining performance of a fast internal sampling rate. 3DM-GX2® incorporates an integral triaxial magnetometer; optionally, the magnetometer can be located remotely to reduce hard and soft iron interference.

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.

3DM-GX2 AHRS Orientation Sensor
  • 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 256Hz) and sensor bandwidth(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 +/- 5 g standard
+/- 1.7 g and +/- 18 g also available (+/- 18 g  may require export license)
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
Gyro nonlinearity 0.2%
Magnetometer range ± 1.2 Gauss
Magnetometer nonlinearity 0.4%
Magnetometer bias stability 0.01 Gauss
A/D resolution 16 bits
Orientation Accuracy ± 0.5° typical for static test conditions
± 2.0° typical for dynamic (cyclic) test conditions & 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
Power consumption 90 mA
Connectors micro DB9
Operating temp. -40 to +70°C with enclosure -40 to +85°C without enclosure
Dimensions 41 mm x 63 mm x 32 mm with enclosure 32 mm x 36 mm x 24 mm without enclosure
Weight 50 grams with enclosure, 21 grams without enclosure
Shock limit 1000 g (unpowered), 500g (powered)
RF Output Power 0dBm (1 mW)

U.S. Patents Pending

  • This product is now a legacy product.

#672: Does the Inertia-Link® or 3DM-GX2® have an analog out option?

No, not currently. If you need an analog out option, please consider our 3DM-GX1® at:

http://www.microstrain.com/3dm-gx1.aspx

Direct link: view
Related products:

#658: May I write my own software application for the Inertia-Link® and 3DM-GX2®?

Yes. We provide a complete data communications protocol manual which describes in detail each and every command and response that is available with the devices.  Applications may be developed in any programming environment (C, VB, LabVIEW, Matlab, etc.) which supports communication via serial port.

Direct link: view
Related products:

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How To Order

To discuss configuration for your specific system requirements, please use our contact sales page.

For large quantity orders or OEM discussions, please contact Michael_Robinson@LORD.COM.

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

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