Strain Gages output calculation

[ghattasak]

Hello Guys,



i have the following sensor a general purpose strain gages from Vishay; EA-06-125BT-120/LE

but I do not understand how the sensor operates, does it outputs a specific voltage level dependent on the measured temperature ? or vibration?

and as for the output pins it is stated on the box "calculation of thermal output for strain gages" therefore does it matter which pin is the + or - and is it considered as a thermo couple ?

guide read: https://www.allaboutcircuits.com/textbook/direct-current/chpt-9/strain-gauges/

the formula placed on box is a polynomial expression: A0+A1*T^1+A2*T^2+A3*T^3+A4*T^4 where aN are the coefficients and T^N is the temperature, how are aN measured

In order to correctly aquire valid data from the sensors what will be my signal conditioning requirements and how is the output voltage read ?

"I have downloaded the pointed material TN-506 sensor document and the box contains a graph chart but no voltage output table, and as I read from previous posts the sensors need to be connected to bridges (half or full) not directly is it correct?"

Thank you in advance much appreciated

 

[BradtheRad]

The Allaboutcircuits tutorial suggests a wheatstone bridge. Here is a typical setup using an op amp. Notice the arrangement resembles a wheatstone bridge.



This should allow testing and experimentation. Later you can figure out how a temperature sensor should influence readings. Perhaps it will be possible to devise a circuit that yields readings which correspond to the polynomial expression.

 

[KlausST]

Hi,

It is not clear to me... do you want to measure temperature or mechanical values?

Klaus