6-AXIS MOTION SENSOR FOR WRIST-WORN DEVICES

摘要

The MPU-6555 is InvenSense's 6-axis (3-axis gyroscope + 3-axis accelerometer) activity detection device, working in conjunction with its Automatic Activity Recognition library (AAR) in a 3 × 3 × 0.9 mm (24-pin QFN) package. The product is suitable for Smart Watch, Smart Band and Fitness Tracker applications. The unit uses data calculated on the on-chip DMP (digital motion processor) to recognise new activities typically within 10 s and with 95% accuracy for true positives. The AAR library offers a pedometer that benefits from the awareness of knowing which activities will require steps and which will not, as well as elevation tracking. The library is optimised to recognise the user's 'persistent' activity, making it useful for cataloguing the user's daily fitness level.