Re: data acquisition / data logging - May be OT in this group
- From: ibuprofin@xxxxxxxxxxxxxxxxxxxxxx (Moe Trin)
- Date: Tue, 19 Dec 2006 18:20:07 -0600
On Tue, 19 Dec 2006, in the Usenet newsgroup alt.os.linux.suse, in article
<1166519945.657551@xxxxxxxxxxxxxxxxxx>, sutterp wrote:
There is now a requirement to keep records about pressure and profile
depth,and the collected data should be integrated in our vehicles
managementsystem, which is web based, runs apache, php and mysql on
SuSE Linux (9.2).
OK... one assumes you've checked with the authorities and such an
electronic/computer based system will satisfy the legal requirements.
We discussed printing a form and record the pressures and depths by
filling in the empty boxes on the form. The disadvantage if this is that
the data entry requires almost as much time as the actual recording of
the data, and we consider it now impractical.
It's also subject to transcription errors, weather, and similar.
What we envisage to do, is to use an industrial/military style laptop
running SuSE Linux and record the tyre pressure and profile depth by
some kind of data acquisition device, either rs232 or usb or network
based.
I'm trying to think where I've seen this before. The depth gauge was
a tool set for a specific tire tread pattern, but you just pressed it
against the tread and it reported the depth of the tread across the
tire (min, max, and statistical average). There were something like
ten sensors mounted on a ~foot long bar, and it reported the depth in
32nds of an inch (0.8 mm). I vaguely recall it having reliability
problems due to dust/dirt/crud getting into the individual sensor
pins and jamming them.
If need be, I am prepared to put in some soldering effort to create
the pressure sensor myself, I have done one already for temperature
like on http://martybugs.net/electronics/tempsensor/. Does anybody
know of pressure sensor?
I know this is being real helpful, but this is also available - I just
can't think who in the hell is the vendor. This is a feature on some
of the new luxury cars here, though the pressure range is wrong for
truck tires. There is also a pressure _switch_ version, which only
indicates "low" tire pressure... Ahhh, BINGO!
Web Results 1 - 10 of about 422,000 for remote tire pressure indicator.
(0.18 seconds)
While I'm looking there;
Web Results 1 - 10 of about 146,000 for electronic tread depth
indicator. (0.18 seconds)
maybe that will steer you in the right direction.
Old guy
.
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