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Greetings!
I need a data logger - has any one any experience of these and any recommendations?
The engines i mess about with especially the diesels are old school mechanical ones, so i need something that is suitable - there are no electronics to gleem data from.
Needed-
Boost
EGT
EGP
Throttle Position
Inlet temps
Coolant Temps
Oil Temps
Oil Pressure
RPM
Time
Thanks!
Max
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I use data loggers in the lab at work. Static stuff at work is mostly National Instruments DAQs which are ££££££££, sometimes Pico loggers which are cheaper, bit more basic but more flexible and more portable, plus a Vishay logger which can do pretty much anything but was ££££££££££££££££££££££££££££. First thing: that's a lot of things to log at once, you might have to use more than one logger. Most of your temperatures are best done with simple K-type thermocouples IMO. You can tape them on wherever you want with kapton tape and you'll be free to move them around. EGT will be more challenging to secure though. All the others will be best done with a 0-10V range or similar (e.g. with a 10 bar pressure sensor it outputs a 0-10V range from 0V at 0 bar 10V at 10 bar). Same for TPS and RPM. You usually set the conversion factor in the logger software (e.g tell it that 0V = 0 rpm and 10V = 16,000 rpm), set a data aquisition rate (e.g. 20hz) and it dumps it all into a CSV file that you can then use Excel for your data analysis, graphs etc. Here's some of the logging setup in the Murray T.50 prototype I spotted at Goodwood. This was their 'thermal' car. That's a proper bank of thermocouples!  |
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gib
Part of things
Posts: 163
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I used to do data logging for work many moons ago and Pico was the preferred option and there used to be an excellent forum. You could say I have a white box with wires and stuff how does it work ? and within in an hour you would understand the white box and the wires.
Don't get hung up on the fact its a car as all you are looking at is a set of signals.
As mentioned above, the price range goes up exponentially the more channels you want to log.
Look for your sensors and sensor range out put if you can find cheap sensors but the range vary by sensor look at spending more so the logger only gets one voltage range.
Other than that once you have a stand alone setup you have it for life for any application.
You don't need a time sensor and be careful when setting the acquisition rate I left an Injection moulder logging 16ish channels over a weekend at something like 1m/s interval instead of 1/30 minutes, back in 98 that eat up all the available storage space.
Older Pico units still come up on Ebay and they are incredibly robust
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