3D motion-sensing chipset integrates advanced filtering and predictive software engine
March 24, 2011 // Julien Happich
STMicroelectronics’ latest iNEMO chipset features a new advanced filtering and predictive software engine that integrates the outputs from a 3-axis accelerometer, 3-axis gyroscope and 3-axis magnetometer. Fusing the sensors’ data through sophisticated algorithms, the dual chip solution delivers dramatically more accurate and reliable sensor performance for next-generation smart consumer devices running new motion-based applications.
For many current applications, such as free-fall detection, screen rotation or pedometers, a single MEMS accelerometer meets the system requirements. However, a new class of advanced applications is emerging, for example: location-based services, enhanced motion-based gaming, pedestrian dead-reckoning for indoor and multi-floor navigation, robotics or human-body tracking.
These applications require multiple MEMS sensors, together with advanced software, to achieve better overall system performance in terms of accuracy, resolution, stability and response time. The software can correct for magnetic distortions registered on the magnetometer, dynamic distortion measured by the accelerometer, and inherent drift over time of the gyroscope. This protects the accuracy of heading information, removes pointing inaccuracies and drift problems, and virtually eliminates timeouts for calibration.
The iNEMO engine is a two-chip sensor solution (LSM303DLHx e-compass and the L3G4200D gyroscope)
More information on ST’s MEMS solutions at www.st.com/mems
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