9-axis motion sensing module

4 April 2012 Analogue, Mixed Signal, LSI

New from STMicroelectronics is INEMO-M1, a smart multi-sensor module offering 9-degrees-of-freedom sensing and a 32-bit processing unit.

The integration of complex motion and magnetic sensing with powerful processing capabilities and dedicated software in a miniaturised module is designed to bring an enhanced degree of realism to gaming, human machine interface, robotics, portable navigation devices and patient monitoring.

The system-on-board completely senses and assimilates linear acceleration, angular velocity, earth gravity and heading, enabling users to precisely detect their direction, orientation and movements in all three dimensions. The sensing accuracy can be further enhanced with the 32-bit processing unit’s capability to embed dedicated sensor-fusion software, integrating the outputs from all the sensors and employing sophisticated prediction and filtering algorithms to automatically correct measurement distortions and inaccuracies.

The compact 13 x 13 x 2 mm unit integrates a 6-axis geomagnetic sensor, a 3-axis gyroscope and an STM32, ST’s ARM-Cortex based 32-bit microcontroller. The iNEMO module offers a wide range of interfaces, including USB 2.0, CAN, USART, SPI, I²C, analog-to-digital channels for external inputs, and flexible power-supply options.

The INEMO-M1 module forms the core of the sensor nodes in ST’s recently unveiled smart-suit prototype for Inertial Body Motion Reconstruction that recognises complex movements of the wearer’s body and translates them to a digital model with impressive precision and speed.

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