Measure.. Camber?

Archiver · 2003-08-07 00:43

Anybody have any thoughts on how you could measure camber? I was
setting up an experiment to have 2 strips ( one wood the other
plexiglass) lying horizontally supported at the ends - then apply
pressure at different distances from the ends, then measure the
amount of bend, and where the apex of the bend is. What I have come
up with so far is the requirement to have at least a horizontal
reference as a base line, then somehow measure the distance between
the baseline and the "flexed" piece after pressure is applied. Seems
to me this would have to be done optically.. but im just not sure.

Any thoughts?

Thanks in advance
Rob

Archiver · 2003-08-07 01:31

In a message dated 8/6/2003 4:45:30 PM Pacific Daylight Time,
rltaylor001@h... writes:

>
> Anybody have any thoughts on how you could measure camber? I was
> setting up an experiment to have 2 strips ( one wood the other
> plexiglass) lying horizontally supported at the ends - then apply
> pressure at different distances from the ends, then measure the
> amount of bend, and where the apex of the bend is. What I have come
> up with so far is the requirement to have at least a horizontal
> reference as a base line, then somehow measure the distance between
> the baseline and the "flexed" piece after pressure is applied. Seems
> to me this would have to be done optically.. but im just not sure.
>
> Any thoughts?
>
> Thanks in advance
> Rob
>

One of many possibilities........an accelerometer. The voltage output will be
XX when pointed straight down (earths gravitaional pull) and the voltage will
change as the inclination changes......It is fairly linear, you could
calibrate for zero and 30 degrees....

Another option is a String Pot.. This is a potentiometer that has a spring
loaded cable on it. Set up an apparatus that will hold the string pot attached
to your deflecting beam. There will be one resistance at no deflection, a
different resistance at a different deflection..

A "reflective" optical sensor is another approach. There will one voltage
when the reflective surface is at rest, a different voltage when the reflective
surfce moves away.

Another approach is to use an ultrasonic emitter and receiver (as seen on the
parallax web sight. This can be used to measure distance. The sensor
apparatus can be configured to return various readings as the distance of the
"bending" piece is moved....

blah blah blah.....

There are many electron heads in this forum. I am sure more ideas will be
presented...

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2003-08-07 01:45

you could probably use a fine pot with the shaft to one and the body
attached to the other use RC time or an ADC

Larry Gaminde

Original Message

From: "rltaylor001" <rltaylor001@h...>
To: <basicstamps@yahoogroups.com>
Sent: August 06, 2003 4:43 PM
Subject: [noparse][[/noparse]basicstamps] Measure.. Camber?

> Anybody have any thoughts on how you could measure camber? I was
> setting up an experiment to have 2 strips ( one wood the other
> plexiglass) lying horizontally supported at the ends - then apply
> pressure at different distances from the ends, then measure the
> amount of bend, and where the apex of the bend is. What I have come
> up with so far is the requirement to have at least a horizontal
> reference as a base line, then somehow measure the distance between
> the baseline and the "flexed" piece after pressure is applied. Seems
> to me this would have to be done optically.. but im just not sure.
>
> Any thoughts?
>
> Thanks in advance
> Rob
>
>
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Measure.. Camber?

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