Estimation of the Turn Section by Using an Inertial Sensor and Ensemble Learning

Abstract

We aim to develop a swimming motion coaching system for the beginners and intermediate swimmers by using one inertial sensor. This system requires the process of automatically estimating and dividing the section of swimming motions from the data. In this paper, as the first step, we constructed a classifier of swimming motions of the butterfly based on the random forest and estimated its turn section. As the result of verification with the test data, it was possible to estimate the start and end points of the turn and their errors are .322±.251s and .416±.186s, respectively. These results suggest that our method can be used in the swimming motion coaching system.