Jämförelse av metoder för beräkning av höjd vid vertikala hopp

• Main Authors: Lindblad, Paulina, Norberg, Filip
• Format: Others
• Language: Swedish
• Published: Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap 2020
• Subjects: Vertical jumps; accelerometer; force plate; Mechanical Engineering; Maskinteknik
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-42338

The purpose of this project was to explore the possibility of using the accelerometer in a mobile device to measure acceleration instead of professional laboratory equipment. Five subjects performed ten vertical jumps each. The equipment used for the purpose of this project was a mobile device, force plate and a motion capture system, of which the last one mentioned was used as a reference for comparison against the others. The data from the mobile device was split into two groups of datasets, where the first one was the nominal acceleration from the raw data and the second one the acceleration when the phones orientation was taken into consideration. The height was calculated by using the double summation, take-off velocity and flight-time. All the data was compiled where the mean deviation, standard deviation, R-value and R-Squared was calculated for each method. The take-off velocity was later used as the final method to give it a fair and equal comparison. The result showed that the force plate was significantly better and more reliable than the mobile device. When comparing the different datasets from the phone, the orientation adapted data performed better than the raw data. The conclusion made from this project was that the force plate is still significantly better than the mobile device regardless of the type of data, but the orientation adapted data demonstrates a result in the right direction.