ELLIPSE2 AHRS & INS
– Hardware Manual
ELLIPSE2HM.1.3
1.3. Aiding sensors
Many different aiding sensors can be used to aid the Ellipse INS.
1.3.1. Internal Magnetometers
A set of three Anisotropic Magneto-resistive magnetometers is embedded within the Ellipse. This
technology provides a very high sensitivity compared to coil based technologies.
Although part of the Ellipse internal IMU, the magnetometer is in fact considered as an “aiding sensor” and
is not mandatory for proper operation.
Nevertheless, in many applications such AHRS applications, airborne or several marine applications, this
magnetometer is still a reliable and efficient way to observe heading.
Note: Magnetometer use requires a specific in place calibration in order to compensate surrounding
ferromagnetic materials and magnets. Please refer to the Ellipse Hard and Soft Iron Calibration
Manual for more information about this.
Warning: Note that magnetometer sampling design makes it impossible to reject signal frequencies
above 75Hz. User should ensure that high frequency noise is not disturbing magnetometers at the
sensor's location.
Specifications
Remarks
Full scale (Gauss)
50
Scale factor stability (%)
0,5
Noise (mGauss)
3
Over 1 to 25 Hz band
Bias stability (m Gauss)
1
Bandwidth (Hz)
22
-3dB attenuation
Resolution (mGauss)
1.5
Sampling rate (Hz)
100
Orthogonality (°)
0.1
After user magnetic calibration
9/50
陕西威瑞仪器仪表有限公司 主营全球知名：气象环境智能交通仪器、安防消防警用军用设备
TEL:029-88186182 WEB:www.go1go.com EMAIL:[email protected]
