Magnetic Sensing
Hello BStampers,
Anyone familiar with a low cost simple solution to do magnetic sensing
and interfacing with a BStamp?
Specifically, I'm looking at wanting to detect a vehicle in front of a
back gate on our property. I do not need to detect motion, just the
presense of a large metalic object in the area by the gate. I figured
that I should be able to compare the Earth's magnetic field
undisturbed versus the field disturbed by the presence of a metalic
object.
I've looked at the Honeywell stuff which looks interesting but
expensive. I also found some sensors at PNI
(http://www.precisionnav.com) in particular the Vector 2X which is
only $50.
Also, a concern is packaging the sensor. The simplest for me to do is
place it inside an existing metal box which has some gate controlling
equipment. This box will perturb the magnetic field but it sure would
be nice to not deal with placing the sensor outside in a weather proof
box.
Any thoughts?
Jah
Anyone familiar with a low cost simple solution to do magnetic sensing
and interfacing with a BStamp?
Specifically, I'm looking at wanting to detect a vehicle in front of a
back gate on our property. I do not need to detect motion, just the
presense of a large metalic object in the area by the gate. I figured
that I should be able to compare the Earth's magnetic field
undisturbed versus the field disturbed by the presence of a metalic
object.
I've looked at the Honeywell stuff which looks interesting but
expensive. I also found some sensors at PNI
(http://www.precisionnav.com) in particular the Vector 2X which is
only $50.
Also, a concern is packaging the sensor. The simplest for me to do is
place it inside an existing metal box which has some gate controlling
equipment. This box will perturb the magnetic field but it sure would
be nice to not deal with placing the sensor outside in a weather proof
box.
Any thoughts?
Jah
Comments
used by sprinkler folks to bore under sidewalks and stuff with a water hose.
Original Message
> Anyone familiar with a low cost simple solution to do magnetic sensing
> and interfacing with a BStamp?
>
> Specifically, I'm looking at wanting to detect a vehicle in front of a
> back gate on our property. I do not need to detect motion, just the
> presense of a large metalic object in the area by the gate. I figured
> that I should be able to compare the Earth's magnetic field
> undisturbed versus the field disturbed by the presence of a metalic
> object.
>
> I've looked at the Honeywell stuff which looks interesting but
> expensive. I also found some sensors at PNI
> (http://www.precisionnav.com) in particular the Vector 2X which is
> only $50.
>
> Also, a concern is packaging the sensor. The simplest for me to do is
> place it inside an existing metal box which has some gate controlling
> equipment. This box will perturb the magnetic field but it sure would
> be nice to not deal with placing the sensor outside in a weather proof
> box.
modules that do this.
Nathan
Original Message
From: jim@j... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=zf7BOrZNwIaOrMvUMYOPwS4kWwRkQMZ3HerATddrLH0YA86BgupiqHkRj2FLTTw-NcFC]jim@j...[/url
Sent: Saturday, November 24, 2001 9:11 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Magnetic Sensing
Hello BStampers,
Anyone familiar with a low cost simple solution to do magnetic sensing
and interfacing with a BStamp?
Specifically, I'm looking at wanting to detect a vehicle in front of a
back gate on our property. I do not need to detect motion, just the
presense of a large metalic object in the area by the gate. I figured
that I should be able to compare the Earth's magnetic field
undisturbed versus the field disturbed by the presence of a metalic
object.
I've looked at the Honeywell stuff which looks interesting but
expensive. I also found some sensors at PNI
(http://www.precisionnav.com) in particular the Vector 2X which is
only $50.
Also, a concern is packaging the sensor. The simplest for me to do is
place it inside an existing metal box which has some gate controlling
equipment. This box will perturb the magnetic field but it sure would
be nice to not deal with placing the sensor outside in a weather proof
box.
Any thoughts?
Jah
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