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EricFitchett edited this page Dec 19, 2012
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car-data-logger strives to be a complete data logging and analysis toolkit for use on the track.
The goal is to fulfill everything described here and more, with the following benefits:
- very cheap (my total cost about US$110 - compare to US$1,000 or more)
- cross-platform
- Non-invasive / easy to install
- modular and extensible - build it one piece at a time, and split the hardware cost over time (or leave off parts or reuse hardware you already have to save more money!)
- open - make it work how you want
My setup is as follows:
- US$29.95 ElmScan 5 Compact
- Connects laptop to car to log many parameters
- Parameters found on my car (US 2004 Mazda RX-8):
- Speed (60 times per second)
- RPM (60 times per second)
- Steering wheel angle (100 times per second)
- Accelerator pedal % (60 times per second)
- Brake pedal (50 times per second)
- Clutch pedal (60 times per second)
- Hand brake (50 times per second)
- Engine coolant temp (10 times per second)
- Intake air temp (10 times per second)
- Tire pressure (all four tires individually, 10 times per second)
- Wheel speeds (all four wheels individually, 50 times per second)
- US$45.55 3-axis accelerometer and Arduino Uno, shipped
- Allows reading lateral and longitudinal Gs 50 times per second. Useful for knowing how well you're utilizing your tires' grip.
- US$35.00 USB Serial GPS (I don't have this exact GPS)
- Associate all the other data recorded with where you are on the track.
- A high sample rate GPS would be best (4+ Hz), such as this one for $37.94
- Free: Reusing my digital camera, which records 720p video. May opt to get one of these instead.
- Associate all the other data with what you see.
- Data overlay videos like TrackVision, as described here
- Free: Reusing my existing laptop to record and analyze the data.
Worst case, even if you have to buy a new camera and (low-end) laptop, it's still cheaper than a commercial system. Plus, you have much more control - and likely many more data parameters!