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These are the bread crumbs I was after, thanks. Sensor data capture
needs to be interrupt driven if possible to optimize power
consumption.<br>
<br>
-Pete<br>
<br>
<div class="moz-cite-prefix">On 10/25/2015 02:38 PM, Justis Peters
via TriEmbed wrote:<br>
</div>
<blockquote
cite="mid:CANuHcUdxSBLpwhUNRifTQrav+k+UAh60K2yzR9Uuj3ZEhRx2zg@mail.gmail.com"
type="cite">
<div dir="ltr">Pete, the examples you give are all univariate
timeseries. I think the solution will be really easy, but I want
to better understand your goals. Is it enough to use a Z-score
against a rolling window? You seem to be optimizing for
something operational here, since you're thinking in terms of
interrupts. What are you trying to optimize?
<div><br>
</div>
<div>Kind regards,</div>
<div>Justis</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Oct 24, 2015 at 5:49 PM, Pete
Soper via TriEmbed <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:triembed@triembed.org"
target="_blank">triembed@triembed.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div style="font-family:'Calibri','sans-serif'">Say I have
a sensor for which a measured baseline signal can be
used as a steady state but some predefined deviation
greater than a given amount can can be defined
"interesting" by virtue of an interrupt. With the
interrupt can come a sequence of samples (either polled
or by reusing the same or different deviation for an
interrupt) before the sensor reading changes are
declared ended, returning to the old or a new normal
baseline level, and the process is set up to be
repeated. Meanwhile, between interrupts and sample
capturing tasks, a set of samples is compared with
previously defined "signatures" to confirm that a set of
samples is "complete" and a <something> has or has
not been detected. I realize that in many cases there
has to be a "moving window" to do with matching up
samples and signatures: I'm just <br>
<div><br>
</div>
<div>I'm looking for the math taxonomy to do with this
for making filters and pattern matchers, but also
practical examples that express specific calculations
for use cases.<br>
</div>
<div><br>
</div>
<div>Example: A photodetector w a programmable
comparator that triggers an mcu interrupt when a light
level is above or below threshold, and arrangements
for detecting these "signatures":</div>
<div> . The moon obscured momentarily by a cloud</div>
<div> . A passing car's headlights</div>
<div> . Dawn</div>
<div> . A cigarette lighter lighting a cigarette</div>
<div> . A cigarette lighter used in "music concert
style"</div>
<div> . Lightning</div>
<div><br>
I guess the ideal would be a few Wikipedia references
to help me begin my education, but some practical
examples that allow correlating the math with code
that implements the math would be much appreciated.<br>
<br>
Thanks,<br>
</div>
<div>Pete</div>
<div><br>
</div>
</div>
<br>
<br>
</div>
<br>
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