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Unread 16-01-2003, 07:59
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Al Skierkiewicz Al Skierkiewicz is offline
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AKA: Big Al WFFA 2005
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Re: Re: Current Monitoring system questions

Quote:
Originally posted by bigqueue
You will notice that a lot of teams measured across calibrated lengths of wire, or even placed very small value resistors in series.......we just measured the voltage drop across the circuit breaker and multiplied by different coeficients for 20A and 30A breakers.

-Quentin
We had thought about doing this, but our experience from previous years was that any breaker that had gone through reset cycles changed resistance. We were afraid that that these changes would make results unreliable since our original plan had been to use the data for feedback to control systems.
As to the custom circuit, I agree with the other posts that a custom circuit gives us the opportunity to teach electrical to students in addition to mechanical. I also think that teams should be able to demonstrate during inspection, the ability to remove the custom circuit and still run. Even without this restriction, teams should make that their first priority. If it fails, remove it and still compete.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.
 


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