Dragy accuracy

daronk · 04-25-2022, 09:17 AM

Not sure if this has been discussed but how does something at 10 Hz accurately display hundredths (0.01). @10Hz and 60mph it updates every 8.8ft. Is hundredth only the internal clock so it would only display say 3.56s and next possible post would be 3.66s?

Looking at purchasing but need some accuracy reassurance first. I would expect the refresh to be much higher to justify accuracy of the posted times in .01 resolution.

Thanks

n55david · 05-01-2022, 07:30 AM

Regardless of the engineering questions. It's been proven to be fairly accurate. I myself have proved it to be within a few hundreds or sometimes thousands of actual time slips.

It's no worse than the margin of error you get with a timing system at a track.

mode.grau · 10-26-2022, 06:11 AM

I can only assume (and hope) the software is analyzing the trend of data points and interpolating to get the last decimal place. Of course that means you have a margin of error, but over the course of 30-100 data points (@10hz), your margin of error should be fairly low.

zinner · 01-01-2023, 05:38 PM

Inertial sensors and timers is how. The AIM Solo 2 has a 10hz GPS and gives the same functionality and racers use AIM. The counterpoint being they also use transponders for the official times. So you probably have a bit of a point.

04-25-2022, 09:17 AM	#1
daronk New Member 3 Rep 18 Posts Drives: BMW 335i Join Date: Apr 2022 Location: NH iTrader: (0)	Not sure if this has been discussed but how does something at 10 Hz accurately display hundredths (0.01). @10Hz and 60mph it updates every 8.8ft. Is hundredth only the internal clock so it would only display say 3.56s and next possible post would be 3.66s? Looking at purchasing but need some accuracy reassurance first. I would expect the refresh to be much higher to justify accuracy of the posted times in .01 resolution. Thanks
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05-01-2022, 07:30 AM	#2
n55david Check out my Youtube @n55david! 1296 Rep 3,533 Posts Drives: 2017 m240i, 2015 X3 x35i Join Date: Aug 2018 Location: Michigan USA iTrader: (0) Garage List 2017 m240i xDrive [0.00] 2015 X3 x35i [0.00] 2015 335i xdrive [0.00]	Regardless of the engineering questions. It's been proven to be fairly accurate. I myself have proved it to be within a few hundreds or sometimes thousands of actual time slips. It's no worse than the margin of error you get with a timing system at a track. __________________ 2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots 2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc
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10-26-2022, 06:11 AM	#3
mode.grau Enlisted Member 41 Rep 41 Posts Drives: 17 340 M-Perf Ed. Fashion Grey Join Date: Apr 2017 Location: Toronto ON, Canada iTrader: (0)	I can only assume (and hope) the software is analyzing the trend of data points and interpolating to get the last decimal place. Of course that means you have a margin of error, but over the course of 30-100 data points (@10hz), your margin of error should be fairly low. __________________ *2017 340i M-Performance Edition (ZE0) - Individual Fashion Grey // Extended Black Merino Leather - xDr 8AT - THP - MPPSK* Previous Cars: 2017 340i xDrive 8AT 2019 Golf R 6MT
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01-01-2023, 05:38 PM	#4
zinner Major 559 Rep 1,127 Posts Drives: `17 X5 35d/`15 335i/`18 M550IX Join Date: Oct 2014 Location: Raleigh, NC iTrader: (0)	Inertial sensors and timers is how. The AIM Solo 2 has a 10hz GPS and gives the same functionality and racers use AIM. The counterpoint being they also use transponders for the official times. So you probably have a bit of a point.
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