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Jim Granville
02/28/13 02:17
Read: 836 times

#189506 - Precision still matters.
Responding to: Daniel Jenkins's previous message
Daniel Jenkins said:
No need for lasers at the start line. The starting line clock is simply a display of the finish line laser's clock. They are electronically set simultaneously in one physical location, then one transported to the start line as simply a display. If I wait 30 seconds after my specified minute, so what. I'll just need to average a slightly higher speed. My actual goal is to cross the finish line on time, not to hold a perfect moving average. There is no trigger at the start line. You get a designated starting time and are scored by your difference between your designated start time and actual finish time as recorded by breaking the beam.

- yes, but you still need to lock your clock, to their clock, to well under 20ms, which is why I asked if they are GPS-second qualified.
You want to eliminate as many manual steps as possible, or make them human-capable. Thus choosing which second is ok, but fractional seconds are best done outside human response.

Daniel Jenkins said:

I can manually resynchronize my setup , but I'll have to do it by sight and manual trigger.

Can you apply your own markers, or can you use existing regular ones like telephone or power poles ?
Are you allowed items like LCD Glasses ?

I make 1 metre ~ 12.427ms, so if you can lock late course markers to well under 1m, you can get under 10ms.

List of 19 messages in thread
Looking for direction - racing application      Daniel Jenkins      02/22/13 23:46      
   step by step      Erik Malund      02/23/13 06:29      
      First step...      Daniel Jenkins      02/23/13 11:20      
         well, you are new      Erik Malund      02/23/13 13:08      
         First, check number sizes and precisions       Jim Granville      02/23/13 15:51      
            Good catch on the clock accuracy.      Daniel Jenkins      02/24/13 01:10      
               Judging      J. Guy      02/25/13 11:17      
                  Judging      Daniel Jenkins      02/26/13 12:25      
                     Rethink your solution      J. Guy      02/27/13 11:04      
                        Not sure we're seeing eye to eye...      Daniel Jenkins      02/27/13 20:16      
                     think precision       Jim Granville      02/27/13 13:44      
                        Increasing accuarcy      Daniel Jenkins      02/27/13 20:28      
                           Precision still matters.      Jim Granville      02/28/13 02:17      
            Precision distance!      Oliver Sedlacek      02/28/13 05:09      
               Rulebook on timing      Daniel Jenkins      02/28/13 11:37      
                  They have a serious system      Jim Granville      02/28/13 13:09      
   very imprecise      Erik Malund      02/28/13 13:37      
      re:      Jacob Boyce      02/28/13 14:52      
         re: speed      Daniel Jenkins      02/28/13 16:45      

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