Ellipse 2 Micro AHRS (IMU)

Ellipse 2 Micro AHRS: a complete, chip-sized navigation system

The Ellipse 2 Micro AHRS combines 2 systems in one:

• An inertial measurement unit equipped with 3 gyroscopes, 3 magnetometers, 3 accelerometers and a temperature sensor for autonomous navigation and for guiding land vehicles
• An AHRS (altitude and heading reference system) with an extended Kalman filter for collecting essential data for sea and air navigation, such as pitch, roll, heave and heading

This IMU/AHRS offers a wide variety of available data, including quaternion, Euler angles and velocity. It ensures quality navigation thanks in particular to its highly accurate measurement sensors.

Despite its particularly light weight (10 g!), the Ellipse 2 Micro AHRS is particularly good at resisting shocks and vibrations (applied force of up to 2 kg).

Develop your applications using the SBG Systems kit

The AHRS in the Ellipse 2 Micro Series range is ideal for automated and autonomous navigation applications, whether for driverless vehicles, exploration robots or mobile surveillance cameras.

To help creators bring their inventions to fruition, SBG Systems has designed a development kit including:

• sbgCenter software to configure and analyse the data transmitted and to program your device in C language
• An evaluation board compatible with all 3 Ellipse 2 Micro Series models
• Unlimited technical support and hardware updates

Which SBG Systems Ellipse 2 Micro model is for me?

Below you will find a summary and code details for each of the Ellipse 2 Micro Series models, to help you choose the right one depending on your project design needs.

Technical specifications of the Ellipse 2 Micro AHRS

• 3 gyroscopes
• 3 accelerometers
• 3 magnetometers
• 1 temperature sensor
• Accelerometer specifications:
  • Range: +/- 16 g
  • Gain stability: 1000 ppm
  • Non-linearity: 1500 ppm
  • Bias stability: +/- 5 mg
  • Random walk/noise density: 57 µg/√Hz
  • Bias in-run instability: 14 µg
  • VRE: 50 µg/g² RMS
  • Alignment error: < 0.05°
  • Bandwidth: 390 Hz
• Gyroscope specifications:
  • Range: +/- 450°/s or +/- 1000°/s
  • Gain stability: 500 ppm
  • Non-linearity: 50 ppm
  • Bias stability: +/- 0.2°/s
  • Noise density: 0.15°/√hr
  • Bias in-run instability: 7°/h
  • VRE: 1°/h/g² RMS
  • Alignment error: < 0.05°
  • Bandwidth: 133 Hz
• Magnetometer specifications:
  • Range: +/- 50 Gauss
  • Gain stability: < 0.5%
  • Non-linearity: < 0.1% FS
  • Bias stability: +/- 1 mGauss
  • Noise density: 3 mGauss
  • Bias in-run instability: 1.5 mGauss
  • Alignment error: < 0.1°
  • Bandwidth: 22 Hz
• AHRS accuracy:
  • Roll and pitch: 0.1°
  • Heading: 0.8° (magnetic heading)
  • Heave: 5 cm
• Interfaces:
  • Available data: Euler angles, quaternion, velocity, position, heave, calibrated sensor data, delta angles and velocity, status
  • Aiding sensors: GNSS: NMEA, UBX, Septentrio, Novatel
  • Output rate: 200 Hz
  • Main serial interface: 1 RS422 or 2 RS232, USB - up to 921,600 bps
  • Serial protocols: binary eCom protocol, NMEA, ASCII, TSS
  • CAN interface: 2.0 A/B - up to 1 Mbit/s
  • Pulse inputs: events, PPS, DMI
  • Pulse outputs: synchronisation (PPS)
  • 2 inputs/outputs
• Dimensions: 26.8 × 18.8 × 9.5 mm
• Weight: 10 g
• Shocks: < 2000 g
• Operating vibrations:
  • @ +/- 8 g: 3 g RMS - 20 Hz to 2 kHz - STD - 810 g
  • @ +/- 16 g: 8 g RMS - 20 Hz to 2 kHz - STD - 810 g
• Aluminium enclosure
• Operating temperature: -40 to 85 °C
• Humidity: 98 % - non-condensing
• Mean time between failures: 50,000 h
• Input voltage: 4-15 V
• Power consumption: 400 mW
• Development kit included
• 2 year warranty

Resources for the Ellipse 2 Micro AHRS

The following documents are available online to help you with your Ellipse 2 Micro AHRS:

• Ellipse 2 Micro Series – Ellipse 2 Micro AHRS (en)