Features
■ Absolute point tracking and motion tracking
accuracy
■ Immunity to magnetic interference for high
performance in real-world conditions
■ Few user-calibration interruptions, enabling
innovative and longer game play
■ Reliable compass heading for accurate
navigation
■ Accurate direction, enabling true augmented
reality applications
■ Support for STEVAL-MKI119V1 MEMS
demonstration kit
■ Support for STEVAL-MKI108V2 and STEVAL-
MKI109V2 MEMS demonstration kits
■ Embedded calibration
■ Supported by Win8 sensor class
iNEMOENgine_PW8
iNEMO Engine Pro
Sensor Fusion algorithm
Data brief
iNEMOENgine_PW8
Description
The iNEMO Engine is a new, advanced software
engine that fuses accelerometer, gyroscope and
magnetometer data to deliver accurate and
reliable motion-sensing information that is easy to
integrate into smart consumer devices.
The iNEMOENgine_PW8 software pack comes
with the iNEMO Engine as a precompiled library
for STM32F103 microcontrollers and the device
firmware upgrade tool.
November 2011 Doc ID 022416 Rev 1 1/6
For further information contact your local STMicroelectronics sales office.
www.st.com
6
iNEMO sensor fusion iNEMOENgine_PW8
1 iNEMO sensor fusion
1.1 Overview
The iNEMO engine is a new, advanced software engine that fuses accelerometer,
gyroscope and magnetometer data to deliver accurate and reliable motion-sensing
information that is easy to integrate into smart consumer devices.
Figure 1. 9-axis sensor fusion
Magnetometer
Gyroscope
Accelerometer
SW libraries
9-axis sensor fusion
1.2 How the iNEMO engine works
The iNEMO engine fuses data from the integrated 9-axis sensor suite with advanced
algorithms that use true high-number-of-states adaptive Kalman filtering.
The iNEMO engine’s adaptive filters converge so that correct heading data overrides
magnetic distortions and anomalies, resulting in more accurate and reliable data.
iNEMO allows the correction of:
● magnetic distortions registered on the magnetometers
● dynamic distortion measured by the accelerometers
● inherent drift of the gyroscope over time
AM10211V1
The iNEMO engine integrates all 9 inertial axes plus compass with complex fusion
algorithms, so the output of the sensor cluster is optimized.
This allows for faster, easier integration into smart consumer devices and higher
performance of the solution as a whole.
The library can be configured to achieve the best trade-off between performance and powersaving to match application requirements.
2/6 Doc ID 022416 Rev 1
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