Time for new validations – Day one!
Validation = Short for checking out if a new system delivers what is needed.
On this first day we had two tasks: Collect validation data for the cross-country and biathlon system – provided by my own Swiss start-up Archinisis – and get some first data from inline skating for the innovative company Marsblade.
We wanted to know how accurate the timing resolution for the split times is for the cross-country and biathlon system in ideal conditions: recording on a straight line with constant speed and perfect satellite visibility. To achieve this goal, we set up two photocell gates spaced 20 m apart next to the biathlon penalty loop at the Oestersund Stadium. Then we modified an electric bike so that we can attach a sensor and make sure that we have a large surface that triggers the timing system always exactly the same way (see picture). With the bike we biked around a loop passing straight through the two photocell gates a total of thirty times at low, medium and fast speeds.
For the afternoon with Marsblade we fixed up two custom made GNSS and inertial sensors on each inline skate and a third sensor was worn by the athlete. Two inline skaters where then skating laps on a parking lot and were filmed at the same time. This data will allow us to get a first idea of how inertial signals during inline skating look like and will allow to develop specialized algorithms to estimate key parameters such as the cadence and stride length.
Stay tuned for our next two measurement days: tomorrow we will do measurements with cross-country skiers and the day after with biathletes at and around Oestersund Stadium.
(Picture below from left: Associate Professor Marko Laaksonen, Professor Matej Supej, Doctor Benedikt Fasel, Performance engineer Alessandro Galloppini and student Oyvind Karlsson)