In this thesis, the possibility of measuring the angle of a cyclist's joints, especially the knee joint, with simple acceleration sensors and a gyroscope was investigated. The sensors were combined in a small device called an inertial measurement unit, or IMU for short, which was attached to the cyclist.
The most important metric we were concerned with is the knee joint angle, as this is the data most frequently mentioned in the professional literature. In addition, the displacement angle of each part of the knee joint was measured separately.
However, the main objective that interested us was the possibility of measuring outside the laboratory, i.e. in the open air on the road. This proved to be possible, but with a relatively low deviation of both the minimum and maximum values of the angle sought, giving us results that are useful for further application.
The results in the laboratory were reliable but slightly lower than the optical measurement. On the road, however, the unreliability did not change much. Comparison of the laboratory values of our sensors, for stationary cycling, and the Qualisys optical system, which is also designed for professional bike set-ups, showed slightly different values but all values within the range sought. This did not change much when riding outside.
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