Biomechanical P ... Slalom Water Skiing R1.pdf - Atrium - University ...

The ski based IMU and transceiver system was housed in a plastic box and mounted tothe water ski in front of the front binding. A custom fabricated aluminum plate wasbolted to the ski using the same footprint as the front binding and fabric straps were usedto secure the IMU box to the plate. The IMU box was wrapped in plastic and placed in awater resistant bag for waterproofing. The setup can be seen in Figure 1. Weights of thefour skis and IMU box were recorded, however details of the different ski designs is notwithin the scope of this paper.a) b)Figure 1: a) IMU system in its housing strapped to the front of one of the skis. b) IMU and itstransceiver system mounted in plastic boxSkier velocity and boat velocity were recorded using similar methods to the previouswork of Runciman, J. [Runciman, 2011]. The author used two GPS units, one located onthe test subject and the other on the boat. When evaluating the previous work it wasdetermined that the boat unit could remain the same but an upgrade to the subject unitwas desirable to capture more of the skier velocity profile.GPS time, boat velocity and boat location were collected from the GPS unit in the boat at1 Hz. The boat unit was an off the shelf product (BG-331RGTGT, Mighty GPS, Toronto,32