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 Post subject: high tech problem ..
PostPosted: Sat Feb 02, 2013 11:48 am 
Old School Hero

Joined: Sun Sep 30, 2012 2:54 am
Posts: 247
Location: Australia
i wish to time a bicycle from point A to point B ...ie 100mts

riding the bike and hitting the stop watch is a fail

having a second viewer hitting a stop watch = fail

speed bike devices measure speed etcetc...yet not time over a set distance..

has anybody body got a idea into this ...?

my readings are to be in milli-seconds ...our bmx race club also wants a device to measure gate launch times...from A- B...

thank you... :roll:


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 Post subject: Re: high tech problem ..
PostPosted: Sat Feb 02, 2013 1:28 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4423
Location: Herts UK
if you can arrange it so that point B is the same as point A, then here you go:

http://www.ebay.co.uk/itm/TIME-TRIAL-LA ... 5d35ce8357

150 mm is plenty wide enough for a bike tyre. :lol:

it should be possible to modify two for these in addition of a key fob remote so that whe the first gate is triggeredm it activates the remote that start the timer on the second gate - when the wheel crosses the second gate, you can read the time.

basically you need some sort of optical beam devices connected to a trasnmitter so send a signal when the light beem is broken; at other end is receiver with a timer that stops when as similar light beam is broken. an interesting projectg for anybody who is into PICs.

i am sure there are productas out there but probably cost in the region of several hundreds of pounds.


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 Post subject: Re: high tech problem ..
PostPosted: Sat Feb 02, 2013 1:30 pm 
Retro Guru

Joined: Sat Dec 11, 2010 10:08 am
Posts: 847
Location: French Alps/Annecy
Depends where you are in Oz, I know someone with timing equipment for downhill skatebaording.......


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 Post subject: Re: high tech problem ..
PostPosted: Sat Feb 02, 2013 1:31 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4423
Location: Herts UK
... and the sort of transmitter i am talking about; range listed as 100m

http://www.ebay.co.uk/itm/GIBIDI-OPEN-T ... 4d0409a935


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 Post subject: Re: high tech problem ..
PostPosted: Sun Feb 03, 2013 11:56 am 
Old School Hero

Joined: Sun Sep 30, 2012 2:54 am
Posts: 247
Location: Australia
here are Australias ranked bmxers in action...as you see timed to milliseconds ...as they launch out of the gates


http://www.youtube.com/watch?v=un_EKcmJS0c


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 Post subject: Re: high tech problem ..
PostPosted: Sun Feb 03, 2013 12:00 pm 
Old School Hero

Joined: Sun Sep 30, 2012 2:54 am
Posts: 247
Location: Australia
since the distance to be measured only to gravels end at most....a car drag strip lights/times board set up would be ideal .....BUT .....I am not that rich ... :lol:


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 Post subject: Re: high tech problem ..
PostPosted: Sun Feb 03, 2013 12:12 pm 
Retro Guru
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Joined: Tue Jun 19, 2007 3:34 pm
Posts: 1847
Location: Launceston, Australia
there has been a bunch of timing gear installed at DH tracks around the country, there is some permanently installed in Hobart, but no ide what it is called or costs. But that could maybe used, obviously the cost could be silly, I seem to remember that some people didn;t want to purchase their own timer thing to make it all work


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 Post subject: Re: high tech problem ..
PostPosted: Mon Feb 04, 2013 5:34 pm 
Old School Grand Master
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Joined: Wed Apr 12, 2006 12:33 pm
Posts: 11105
Location: The Home Of Mountain Biking, And All Great Things.
Couple of cameras and some marker posts/lines. You don't need to trigger anything, or stop start anything.


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 Post subject: Re: high tech problem ..
PostPosted: Mon Feb 04, 2013 9:03 pm 
Old School Hero

Joined: Sun Sep 30, 2012 2:54 am
Posts: 247
Location: Australia
my heads hurting as the best i can think of would be a stop watch set up..

but at best on that is i am measuring 1 rider at a time or get 6 others doing the same


:facepalm:


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 Post subject: Re: high tech problem ..
PostPosted: Mon Feb 04, 2013 9:08 pm 
Old School Hero

Joined: Sun Sep 30, 2012 2:54 am
Posts: 247
Location: Australia
also note this as these men are twitchy sound eagles ...noise in gates beeps or lines crossed will make them cry,laugh,scream,jump yell ....yes in that order towards us ...


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