A standalone wireless 6 degree-of-freedom motion sensing module and its applications in health care

A standalone wireless motion sensing module, which provides total of 6 Degree-of-Freedom (DoF) motion information with a 3-axis accelerometer, is presented in this paper. It is a BLEenabled Accelerometer-based Sensing In a Chip-packaging (BASIC) module with patented CORDIC-based tilting angle transformation algorithm implemented. As the results, the device provides not only the 3-axis acceleration data but also the 3-axis tilting angles wirelessly through BLE technology. It has the features of low cost, low energy, small form-factor, digitized information for easy system integration and standalone battery operation with wireless data communication capability. Hence, it is suitable for a wide variety of applications, such as Internet of Things (IoT), electro-mechanical equipment in industry, consumer electronic products, express delivery, and especially on health care applications.