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14point7 iDash
http://forum.diyefi.org/viewtopic.php?f=37&t=2761
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Author:  Fred [ Sun Mar 05, 2017 10:10 am ]
Post subject:  Re: 14point7 iDash

That noise is uni-directional! Makes normal averaging of any kind useless. Do you have a median filter available? Even that might not be OK. Another option would be a floor filter over X samples. I could easily add this to my viewer if you send a raw CSV and upload a pic of it. Let me know.

Author:  Nige [ Sun Mar 05, 2017 10:48 am ]
Post subject:  Re: 14point7 iDash

That could be extremely handy, I'll see if I remember to send tomorrow. The Matrix/tables I can filter the data to exclude above/below values which makes that useful, but doesn't give me the option in the graph view.

When looking at the log graph I can see the values that are "real" so I'm not overly worried. But yeah, it's annoying lol.
I was wondering about a filter along the lines of "exclude if further than X from previous value" but that would get awkward too methinks.

Author:  Nige [ Wed May 03, 2017 9:21 am ]
Post subject:  Re: 14point7 iDash

so... I already had MLV and mucked around with filtering. Ended up adding a delta channelf or each channel, then having it use the previous value if the delta was above X value (experimented to get a a balance between getting rid of spikes and retaining actual data - reached a point where it was ALL a copy of the value before it lol.

Anyway, much better:
Image

I also did a Lambda channel calculated from AFR (I know, I should record in lambda lol!) and a TPS calculated channel from Vin1 which was TPS voltage.
Interesting, I must be getting better with Lambda scale as it had more meaning to me than the methanol AFR scale tables did. Traditionally I'd use Petrol AFR scale in the past.
Image

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