[DUG] Chart Smoothing

[David Moorhouse]

I’d get a better sensor …

David Moorhouse (BCom) | Development Manager
Regional HealthOne Programme
P: 03 353 0871
E: david.moorhouse at pegasus.org.nz<mailto:david.moorhouse at pegasus.org.nz>
401 Madras St, Christchurch 8013
PO Box 741, Christchurch 8140
[cid:image001.png at 01D74576.A5BDB610]


From: delphi-bounces at listserver.123.net.nz <delphi-bounces at listserver.123.net.nz> On Behalf Of Todd Martin
Sent: Sunday, 9 May 2021 1:56 PM
To: Marshland Engineering <marshland at marshland.co.nz>; NZ Borland Developers Group - Delphi List <delphi at listserver.123.net.nz>
Subject: Re: [DUG] Chart Smoothing

Maybe adapt a median filter to Delphi. http://rosettacode.org/wiki/Median_filter

On Sun, May 9, 2021 at 1:24 PM Marshland Engineering <marshland at marshland.co.nz<mailto:marshland at marshland.co.nz>> wrote:
I'm reading a noisy signal and need to filter the data. I've tried many home
grown techniques but none are any good enough.

Here is a sample of the data. I'm working on acceleration which is the rate of
change of speed. The change of speed between samples (30hz) is quite small so
the result is quite noisy as you can see.

http://www.marshland.co.nz/ftp/Delphi/Plot.jpg

Anyone found something that I can use ?

Thanks Wallace

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