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drewjet


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Race video with data logging
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We had our first race of the season. Here is a video of it. We are using the Cycle Analyst and data logger. Using race render I can make a heads up display.

 

http://www.youtube.com/watch?v=aDJcqEL7YwM

 



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electrathon


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Very cool video. Can you explain more about the display you are running? Also, how many amp hours can you pull out of your batteries before they are dead?

Aaron

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drewjet


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The display is know as a cycle analyst. It is available from www.ebike.ca It monitors voltage, amperage, and speed. It then from that calculates distance, watts, amp hours, watt hour per mile. The CA Logger loggs all the info at a rate of 5Hz. 

 

I then used a program called race render 2 that will take video and overlay the data



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drewjet


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we generally get about 31 AH out of them



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Zaine Stapleton


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Aaron, its the same meter I have in my car.  Also the same thing Nick got two years ago when he was a senior at Centennial.

You really did bug me for how much power I was pulling at the very first race I showed up with my car at the Eugene Celebration in the summer of 2009. 

Back then I didn't really know much, now however I know quit a bit.

Zaine



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ProEV


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The data display is really interesting. Thanks for sharing it.  I got the Super Coupe's readings from the first race and 20 minutes of in car video. I will try and put it together and put a video up. The second race, the video did not work and the Arduino decided the whole race was one long lap. I also have some doubts about the accuracy of my current and voltage readings. The ones I am getting from the controller are 25% higher than what my clamp on Fluke meter is showing. My meter has not been calibrated in 5 years but matches my cheapo precision power supply built in current meter within 2%. Your 31 Ahrs * 24 volts is 744 Whrs which is in line with the constant discharge Optima tests I have seen on Electrathon Forums.   The Super Coupe data shows 527 Whrs at the end of the first race. Our no load voltage was 42 (10.5 per battery) so we were pretty empty. Add 25% (Using the controller readings) we would still be at 658 The four Deka batteries weigh between 17.5 and 18 lbs, so I am running almost the same amount of lead.  I wonder if they just have that much less capacity Cliff

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Kyle Keenan


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Very cool! Data has been a big thing in Club racing for a few years, cool to see it starting to come into electrathon! Are things like speed and laptime controlled with sensors or GPS?

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drewjet


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The speed is calculated using a magnet on a wheel and a sensor, just like a bicycle. For lap timing I use Track Master an android App

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