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Re: Garage door automation - position detection
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I built a prototype garage door position sensor by having the door pull the
inertia reel seatbelt (disable the inertia mechanism) from an old Metro
over the guts of a cheap optical mouse. Works fairly well as long as you
build some sort of rig to keep the mouse pressed against the fabric. I also
tried a steel tape measure, but the mouse had trouble seeing the shiny
curved surface. Some sort of shaft encoder would probably work well too.
cheers
ant
On 1 February 2014 14:03, Simon McCaughey <simonmcc@xxxxxxx> wrote:
>
>
> I have automatic garage roller doors installed which operate from a
remote
> control. Recently I have been working on a project to use a Raspberry
Pi to
> remote control them. So I have some relay outputs, and that all works
fine.
>
> I also decided to install a beam detector, so that if the door is
closing
> and the beam is broken that the door will reverse.
>
> To detect if the door is open or closed I planned to use magnetic reed
> switches - one at the top and one at the bottom, nice and simple way
to
> know where the door is (I don't care where it is at if it is somewhere
in
> the middle
>
> The problem: I have tried and tried, but I can't come up with a
position
> for the switches that works, its really tricky, far worse than I
thought it
> would be, it is hard to get them in a position where they are
triggered by
> the magnets.
>
> Any other suggestions for door position sensing? I thought of
> microswitches with a actuator arm, but again I'm not sure where they
could
> be positioned.
>
> Regards
>
> Simon
> ---
>
>
>
>
>
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<div dir=3D"ltr">I built a prototype garage door position
sensor by having =
the door pull the inertia reel seatbelt (disable the inertia mechanism)
fro=
m an old Metro over the guts of a cheap optical mouse. Works fairly well
as=
long as you build some sort of rig to keep the mouse pressed against the f=
abric. I also tried a steel tape measure, but the mouse had trouble seeing
=
the shiny curved surface. Some sort of shaft encoder would probably work
we=
ll too.=A0<div>
<br></div><div>cheers</div><div><br></div><div>ant</div></div><div
class=3D=
"gmail_extra"><br><br><div
class=3D"gmail_quote">On 1 February 2014 14:03, =
Simon McCaughey <span dir=3D"ltr"><<a
href=3D"mailto:simonmcc@xxxxxxx"=
target=3D"_blank">simonmcc@xxxxxxx</a>></span>
wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0
.8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
=20=20=20=20=20=20=20=20
<div>
<br><br>
<div dir=3D"ltr">I have automatic garage roller doors
installed which opera=
te from a remote control. Recently I have been working on a project to use
=
a Raspberry Pi to remote control them. So I have some relay outputs, and
th=
at all works fine.=A0<div>
<br></div><div>I also decided to install a beam detector,
so that if the do=
or is closing and the beam is broken that the door will
reverse.=A0</div><d=
iv><br></div><div>To detect if the door is open or
closed I planned to use =
magnetic reed switches - one at the top and one at the bottom, nice and
sim=
ple way to know where the door is (I don't care where it is at if
it is=
somewhere in the middle</div>
<div><br></div><div>The problem: I have tried and
tried, but I can't co=
me up with a position for the switches that works, its really tricky, far
w=
orse than I thought it would be, it is hard to get them in a position
where=
they are triggered by the magnets.</div>
<div><br></div><div>Any other suggestions for door
position sensing? I thou=
ght of microswitches with a actuator arm, but again I'm not sure
where =
they could be positioned.<br><div><br
clear=3D"all"><div><div dir=3D"ltr">
Regards<br>
<br>Simon<div>---</div><div><br></div></div></div>
</div></div></div>
<br>
<br>
<div width=3D"1"
style=3D"color:white;clear:both"></div>
</div>
</blockquote></div><br></div>
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