Wednesday, February 1, 2023

6-Axis Inertial Measurement Unit Suitable For Precise Gesture Recognition For XR Headsets

By Sharad Bhowmick

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  • 6-axis inertial measurement unit (IMU) combines Artificial Intelligence (AI), adaptive-self-configuration (ASC), and ST’s Sensor Fusion Low Power (SFLP) technology for superior power optimization.
  • The IMU is ideal for applications such as advanced 3D phone mapping, precise gesture recognition for XR headsets, always-on activity tracking, etc.

 

Image of LSM6DSV16X (Source: STM)

LSM6DSV16X from ST Microelectronics is a 6-axis inertial measurement unit (IMU) that can precisely detect movement in a 3-dimensional (3D) Space. The LSM6DSV16X is ST’s flagship 6-axis IMU device that combines Artificial Intelligence (AI), adaptive-self-configuration (ASC), and also ST’s Sensor Fusion Low Power (SFLP) technology for superior power optimization.

The device is capable of providing a fast real-time response as all the processing is done in the MEMS sensor itself. The LSM6DSV16X also features a triple sensing core to meet the differing needs of user-interface controls and optical/electronic image stabilization (OIS/EIS).
The 6-axis MEMS IMU features the latest I3C interface for communication and comes with a 3-axis low noise accelerometer and 3-axis gyroscope for accurate sensing in an industry-standard size. The IC also integrates an enhanced finite state machine (FSM), to detect fast events and custom gestures.

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To help simplify the task of product designers, ST has published ready-to-use MLC and FSM algorithms on GitHub to cut time to market when implementing these advanced capabilities in new products. The IMU also makes the AI features, extracted by MLC, available for external processing. The advanced architecture of the LSM6DSV16X enables sophisticated processing in the edge, making the device ideal for advanced 3D phone mapping, context awareness in laptops and tablets, reliable and precise gesture recognition for XR headsets, as well as always-on activity tracking.

According to the company, the LSM6DSV16X integrates for the first time in an IMU a charge-variation (ST Qvar) sensing channel to monitor changes in electrostatic charge, either through electrodes in contact with the body in a smartwatch or fitness band or by non-contact sensing (“radar”). The LSM6DSV16X comes in a compact 2.5mm x 3.0mm x 0.83mm 14-lead LGA package. The device does the processing at the edge and is ideal for applications such as advanced 3D phone mapping, reliable and precise gesture recognition for XR headsets, as well as always-on activity tracking.


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