Miniature Inertial Navigation System Integrates 9-axis IMU Sensor and RTK GNSS with 1cm Accuracy

SBG Systems Ellipse-D is an industrial-grade inertial navigation system (INS) equipped with a 9-axis IMU sensor, a dual-antenna RTK GNSS module with one-centimeter accuracy, and a 64-bit microprocessor for processing the data.

The inertial navigation system also includes a temperature sensor and a pressure sensor, supports odometer input, and is available in either Box or OEM versions.

SBG Systems Inertial navigation sensor
Box (left) and OEM (right) versions

SBG Systems Ellipse-D inertial navigation sensor specifications:

  • SoC – Unknown 64-bit microprocessor for data processing
  • GNSS – Dual antenna GNSS with support for GPS, GLONASS, GALILEO, BEIDOU; Supported features: SBAS, RTK, RAW
  • Sensors – 3-axis gyroscope, 3-axis accelerometer, 3-axis magnetometer, temperature sensors, pressure sensor
  • Host Interface
    • RS-232, RS-422, USB  up to 921,600 bps
    • CAN 2.0A/B up to 1 Mbit/s
    • Protocols – Binary eCom, NMEA, ASCII, TSS
  • Input Voltage – 5 – 36 V
  • Power Consumption – < 1,000 mW
  • Dimensions & Weight
    • Box: 46 x 45 x 32 mm | 65 grams
    • OEM: 29.5 x 25.5 x 16 mm | 17 grams

Inertial navigation sensor block diagramThe device outputs plenty of variables after processing sensor data including Euler angles, quaternion, velocity, position, heave, calibrated sensor data, delta angles & velocity, barometric data, status, GPS data, UTC time, GNSS raw data (Post-processing), and more.

An Ellipse AHRS & INS development kit is available with the company’s earlier Ellipse-A inertial system with a motion sensor only, and the Ellipse-C model very similar to the Ellipse-D system covered here, but featuring a simple GNSS antenna.


Ellipse AHRS & INS Development Kit
Click to Enlarge

Ellipse INS can also optionally be connected to a PC using Qinertia program which offers the following

  • Detailed analysis after the mission
  • Replay the sensor data with different configuration
  • Refine the mechanical installation (GNSS lever arm) to the centimeter level for improved real-time behavior
  • Reach ultimate sensors performance using Forward/Backward/Merge processing
Qinertia Inertial navigation System Software
Qinertia – Click to Enlarge

SBG Systems Ellipse-D inertial navigation system can be used for all sorts of vehicular applications including motion & heave monitoring, data georeferencing, gimbaled cameras (e.g. fitted to a helicopter), autonomous UAV/USV navigation, orientation pointing & stabilization, and more.

More details can be found on SBG Systems Ellipse-series product page.

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