Automatic jump detection in skiing/snowboarding using head-mounted MEMS inertial and pressure sensors

Abstract

With advancing technology in the miniature microelectromechanical systems (MEMS) sensors, wearable devices are becoming increasingly popular, facilitating convenient activity detection. One particular application is in sports performance monitoring. This article presents a novel real-time jump detection algorithm in skiing and snowboarding using a microelectromechanical systems-based inertial measurement unit, which is integrated with a barometric pressure sensor. The key performance variables of the jump can be extracted and evaluated for training and/or entertainment purposes. In contrast to the existing jump detection algorithms based on acceleration signals, the proposed algorithm uses vertical velocity and air time in addition to acceleration in the vertical direction. The experimental results show that by incorporating the velocity and air time into the detection algorithm, the sensitivity and specificity increase dramatically to 92% and 93%, respectively.

Development of a simple algorithm to detect big air jumps and jumps during skiing

“…Their results showed that 92% of jumps during snowboarding, including ollie, step-up, cliff drop, and standard jump, were detected correctly. Lee et al [ 23 ] detected jumps based on a threshold method for skiing and snowboarding. The authors used IMUs mounted on the helmet and additionally a MEMS barometric pressure sensor to detect jumps during skiing and snowboarding.…”

“…The authors used IMUs mounted on the helmet and additionally a MEMS barometric pressure sensor to detect jumps during skiing and snowboarding. However, according to Lee et al [ 23 ] the head is not the perfect place due to head movements. Roberts-Thomson et al [ 24 ] presented a fuzzy logic-based algorithm for jump detection in sports using accelerometer data of IMUs.…”

Development of an inertial motion capture system for kinematic analysis of ski jumping

“…Further studies concentrated on the use of single sensors for the extraction of motion characteristics and jump detection. 9 Multiple sensor devices were used to measure the flight of an Olympic champion in 2010 10 and in a series of more detailed studies on the estimation of kinematic parameters during flight in 2012 and 2013. 11,12 Here, the different flight phases of a ski jump could be annotated based on the raw inertial sensor data.…”