how to measure temperature with strain gauge?

Answer 1

Since thermal deformation is proportional to temperature and a strain gage can be employed to measure deformation, temperature can be determined with a strain gage.

If l_0 Is the length of the member before deformation (inches)
l is the deformation (strain) as measured by the strain gage (inches)
T_0 is the temperature of the member before deformation.
T is the temperature after deformation (F)
k is the thermal expansion coefficient of the material (inches per inches-F)
Than apply this general formula

l / l_0 = k * (T - T_0)

T=T_0 + (l / l_0) / k

If you do not know the temperature at the start you can still determine the the temperature rise, delta T

(T-T_0)= deltaT=(l/l_0) / k

Answer 2

A tension gauge responds in elementary terms to tension, no longer temperature. you desire an RTD (Resistance Temperature Detector) to degree temperature. To get rid of twine heating effects, use a 4 twine connection. 2 wires for contemporary, 2 for voltage. additionally undergo in techniques which you extremely desire an extremely comfortable voltmeter to degree the bridge output. (That resolves, say, a million microvolt). of course temerature will fairly impact the output of a tension gauge and you may atone for it. it is not sparkling out of your question whilst you are trying to degree tension or temperature. additionally, an basic tension gauge won't paintings on timber. you may desire to apply something like an LVDT to try this.

Answer 3

You can't... you can use it to measure the deformation of an object due to expansion or contraction FROM temperature fluctuations