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DAQ for logging fast frequency events. 100k/sec

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fastline

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We are needing to log data from digital automotive ignition systems to determine the rev limit and ignition curve. The method is straight forward but not sure about the electronics on this one. Basically, we need to supply a power to the ignition box via function generator or whatnot, and a .1V triggering voltage at 1-2 pulses per crank revolution. The ignition box will compute the frequency of the trigger pulses per sec to determine how much advance to add or remove.

We basically will just need to vary our trigger pulse from 1-15,000hz and read the relation (delta) of triggered event and ignition box output event. It would also be useful to look at the amplitude of the input and output. I am figuring we would need to read at about 100K reads per sec which is roughly 1 read per degree of crankshaft rotation at 17K rpm. The faster the better probably.

We also need a travel friendly setup for this. A local shop runs labview that we can use but we do not have this on our own computers so not sure what we might do to set this up and log with a PC.

Ideas?
 
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Sceadwian

Banned
How much data do you actually need to log? Handheld digital osciliscope will log data, but it really depends on how must you need to look at once. Even cheaper handheld scopes will be able to do 1 milions samples a sec or better.
 

fastline

Member
We currently have an older Fluke scopemeter but looking at a newer one that is PC compatible. TO be honest, we were really hoping to use DAQ for this because we have a LOT of plans for DAQ in the near future and saw this as a good test for these systems and get more familiar with them. We have a basic system right now but it only reads to 10,000 samples/sec. We were also hoping to be able to send other users this adaptor along with software to be able to log this data as well as check for a defective ignition device.
 

Sceadwian

Banned
Yeah, but how many samples do you need to actually capture? 100k samples a seconds doesn't tell us anything about how long you need to capture for. A simple handheld DSO with a big capture buffer could work fine for you.
 

fastline

Member
Well, to do a simple sweep test, we would only need approx 3 sweeps whic could only take a few seconds each and then average and analyze the sweeps for repeatability. We would also need to do endurance testing too which would just maintain the same input frequency for 5-20min to verify there are no misses in output events after the component it warm.

Hopefully that answers your question somewhat.
 
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