Energy-Efficient Wearable EPTS Device Using On-Device DCNN Processing for Football Activity Classification

Sensors

Hyunsung Kim¹  Jaehee Kim¹  Youngjoo Lee¹  Young-Seok Kim²  Mijung Kim³ 

[1] Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang 37673, Korea;Institute of Artificial Intelligence, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang 37673, Korea;Sports AIX Graduate Program, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang 37673, Korea;

关键词: electronic performance and tracking system;    sports wearable device;    energy-efficient sensor control;    on-device DCNN processing;   

DOI  :  10.3390/s20216004

来源: DOAJ

【 摘 要 】

This paper presents an energy-optimized electronic performance tracking system (EPTS) device for analyzing the athletic movements of football players. We first develop a tiny battery-operated wearable device that can be attached to the backside of field players. In order to analyze the strategic performance, the proposed wearable EPTS device utilizes the GNSS-based positioning solution, the IMU-based movement sensing system, and the real-time data acquisition protocol. As the life-time of the EPTS device is in general limited due to the energy-hungry GNSS sensing operations, for the energy-efficient solution extending the operating time, in this work, we newly develop the advanced optimization methods that can reduce the number of GNSS accesses without degrading the data quality. The proposed method basically identifies football activities during the match time, and the sampling rate of the GNSS module is dynamically relaxed when the player performs static movements. A novel deep convolution neural network (DCNN) is newly developed to provide the accurate classification of human activities, and various compression techniques are applied to reduce the model size of the DCNN algorithm, allowing the on-device DCNN processing even at the memory-limited EPTS device. Experimental results show that the proposed DCNN-assisted sensing control can reduce the active power by 28%, consequently extending the life-time of the EPTS device more than 1.3 times.

【 授权许可】

Unknown