Re: Strain gauge

[nobody@xxxxxxxxxxxx (Dave Houston)]

You might investigate these...

     http://www.tekscan.com/flexiforce.html

"Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote:

>"Robert L Bass" <sales@xxxxxxxxxxxxxxxxxxxxx> wrote in message
>news:1bu402p1vtjfrd9vcg1acd3o9iq5eec5qg@xxxxxxxxxx
>> > No, that is not how they work.  The resistance changes when the
>> > Pulsor is stressed.  It remains changed as long as the stressing
>> > force is applied.  The detection of (only) a moving load is entirely
>> > a function of the processor electronics.
>>
>> After posting that I called an old friend who worked with me
>> years ago and asked about that.  You are correct.  My bad.
>
>I did some more web searching and found that the sensors are pretty
>expensive - one mailing list suggested $100 each for a sensor and a
>processing board.  That's more than I wanted to spend per sensor.
>
>http://www.sureaction.com/pulsor.htm
>
>doesn't mention price either.  I've found that's never a sign of low prices.
>
>I want to use something like the strain gauge they use in electronic
>bathroom scales.  The Pulsor seems to work using a longitudinal sensor glued
>to a joist that can detect deflection.  I would rather have a sensor that
>reported a change in resistance as it experienced an increase or decrease
>from the "setup" load.  Since I am refinishing a section of the basement, I
>want to mount some sensors in various locations so that I can detect
>increasing static loads on parts of the support structure.