telemetry
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I am a Stamp2 novice. I would like to make a device that would track
a firefighter's location that is going into a large building, and
then have that location monitored by someone outside of the building.
The range would have to be about 300 feet.
I think GPS would not work because the firefighter would be
inside a steel and concrete structure. Altitude is also a factor in a
high rise building.
If constant tracking is not possible, then maybe I would be
looking for something that would help me find a lost firefighter in a
large building. We firefighters now have loud alarms that go off when
still for a certainn length of time. I am looking for something
better than that.
Any ideas would be appreciated.
Thank, Tom Ashe
a firefighter's location that is going into a large building, and
then have that location monitored by someone outside of the building.
The range would have to be about 300 feet.
I think GPS would not work because the firefighter would be
inside a steel and concrete structure. Altitude is also a factor in a
high rise building.
If constant tracking is not possible, then maybe I would be
looking for something that would help me find a lost firefighter in a
large building. We firefighters now have loud alarms that go off when
still for a certainn length of time. I am looking for something
better than that.
Any ideas would be appreciated.
Thank, Tom Ashe
Comments
Being a firefighter, I know what you mean. The only ways to acomplish this
could be, me thinks:
1. Use radio direction finding (RDF). You could provide each man with a
radio transmitter, which sends bursts at set intervals, with their ID
number. With two, but preferably three doppler RDF receivers you could
pinpoint a location quite accurately (in 2D space, if you need to know the
floor they are on that's harder). The receivers would have to be placed on
three different sides of the building - maybe mounted on the fire vehicles.
Even so, mapping the received bearings onto a building's map is somewhat
difficult, as the receiving station's location relative to the building also
need to be known.
2. Use an inertial system, which keeps track of the firefighter's
acceleration in two or three axis, and determines or estimates distance
travelled. An application note of this is on Analog Devices' web page
regarding the ADXL202 accelerometer.
I've just thought up another one, a kind of reverse-do-it-yourself GPS
system. If you have three or four transmitters sending out regular pulses,
it should in theory be easy, provided you have an accurate timebase, to
calculate the time difference between the signals received at a firefighters
location, and then send back these timings to a tracking station that does
all the calculation and triangulation.
Other than this, yelling into the radio, as it has been done since it's been
invented, and trusting the alarm...
All the best,
Mike
>
Mensaje original
> De: tashe@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=wG8s2zfGPq_KhCvjtX_q2HfhyOsbELtZBanXA4UASTE4dc9yLrGXb8OkAwwpwo6BEWzlUX6RSsFVNcA3]tashe@a...[/url
> Enviado el: jueves, 18 de enero de 2001 22:22
> Para: basicstamps@egroups.com
> Asunto: [noparse][[/noparse]basicstamps] telemetry
>
>
> I am a Stamp2 novice. I would like to make a device that would track
> a firefighter's location that is going into a large building, and
> then have that location monitored by someone outside of the building.
> The range would have to be about 300 feet.
> I think GPS would not work because the firefighter would be
> inside a steel and concrete structure. Altitude is also a factor in a
> high rise building.
> If constant tracking is not possible, then maybe I would be
> looking for something that would help me find a lost firefighter in a
> large building. We firefighters now have loud alarms that go off when
> still for a certainn length of time. I am looking for something
> better than that.
> Any ideas would be appreciated.
>
> Thank, Tom Ashe
>
>
>
>
>
>
building under zero visibility conditions and that has features to help
find your way out as well as the ability to tag hazadarous materials and
locate them. New stuff with a PIC as the controller that is in the approval
stages with the various authorities to become standard approved equipment.
Much cheaper than thermal imaging cameras and will work in areas that the
cameras can't plus much more robust.
At 09:22 PM 1/18/01 -0000, you wrote:
>I am a Stamp2 novice. I would like to make a device that would track
>a firefighter's location that is going into a large building, and
>then have that location monitored by someone outside of the building.
>The range would have to be about 300 feet.
> I think GPS would not work because the firefighter would be
>inside a steel and concrete structure. Altitude is also a factor in a
>high rise building.
> If constant tracking is not possible, then maybe I would be
>looking for something that would help me find a lost firefighter in a
>large building. We firefighters now have loud alarms that go off when
>still for a certainn length of time. I am looking for something
>better than that.
> Any ideas would be appreciated.
>
>Thank, Tom Ashe
>
>
>
>
>
>
Larry G. Nelson Sr.
mailto:L.Nelson@i...
http://www.ultranet.com/~nr
Who is the company? Very interested as I have designed a few see through
smoke devices for fire fighters.
Please email mocenter@e...
Thanks
Mike M
Original Message
From: Larry G. Nelson Sr. <nr@m...>
To: <basicstamps@egroups.com>
Sent: Thursday, January 25, 2001 8:48 AM
Subject: Re: [noparse][[/noparse]basicstamps] telemetry
> There is a company that is completing a device for finding a fireman in a
> building under zero visibility conditions and that has features to help
> find your way out as well as the ability to tag hazadarous materials and
> locate them. New stuff with a PIC as the controller that is in the
approval
> stages with the various authorities to become standard approved equipment.
> Much cheaper than thermal imaging cameras and will work in areas that the
> cameras can't plus much more robust.
>
>
> At 09:22 PM 1/18/01 -0000, you wrote:
> >I am a Stamp2 novice. I would like to make a device that would track
> >a firefighter's location that is going into a large building, and
> >then have that location monitored by someone outside of the building.
> >The range would have to be about 300 feet.
> > I think GPS would not work because the firefighter would be
> >inside a steel and concrete structure. Altitude is also a factor in a
> >high rise building.
> > If constant tracking is not possible, then maybe I would be
> >looking for something that would help me find a lost firefighter in a
> >large building. We firefighters now have loud alarms that go off when
> >still for a certainn length of time. I am looking for something
> >better than that.
> > Any ideas would be appreciated.
> >
> >Thank, Tom Ashe
> >
> >
> >
> >
> >
> >
> Larry G. Nelson Sr.
> mailto:L.Nelson@i...
> http://www.ultranet.com/~nr
>
>
>
>
>