MATT MARINER BROZE wrote: .........It appears to be nearly exactly how I envisioned it needed to be with strain gauges out near each blade on the shaft and three rotational accelerometers to position its orientation exactly in space at all times. The rotation sensors I felt would be a needed to prove the paddle was being used in a consistent manner during trials of different boats. I've already e-mailed Chris at Sea Kayaker the link in the hopes that they can get one to review ASAP. ........ G'Day Matt, Hope you enjoy your break. We talked about this kind of paddle abut five years ago and the role of gyroscopic measurement as well as three axis accelerometers. It looks as if the Talon software has come a long way since then. A paddle restricted to just accelerometers would probably require a double integration in three axes to solve the relevant equations and consequently a deal of calibration and the data could be quite noisy. Hence the potential for gyroscopic measurement. These transducers are now small enough and with fast enough response times to be used in this application and I suspect they have been incorporated. Its a topic Andrew Eddy (an erstwhile Paddlewiser) and I have been discussing at some length as the techniques involved are similar to some that we use in vibration testing of transportation systems. Margi at Canberra University is likely also working with the Australian Institute of Sport who train athletes for the Olympics. As its a locally built product I'll try contacting her and see if I can get some feedback for Paddlewise and my own interest in the algorithms used. All the best, PeterO *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Sun Jul 25 2010 - 05:02:32 PDT
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