M
hi
i have devised extensometer calibration apparatus using a electronic probe( works like a plunger type dial guage, but gives a voltage out put based on the displacement of the plunger) and DRO(Digital Read Out, it is didgital indicator). I have used a coaxial spindle in the apparatus.The working is simple.Extensometer is clamped on the spindle.When i rotate a screw , spindle moves upward, which in turn presses the probe. the the DRO ( indicator) will show the displacement in microns. It has got a resolution of 0.1 micron.The apparatus has got an uncertainty of 0.0004mm (k=2, 95.45% confidence level, )...........
1.My question is what is the uncertainty budget for the extensometer calibration? i need information about the various sources of uncertainty that can contribute to the above mentioned calibration.
2.Suppose if resolution of extensometer is 0.001mm, and if it is found to be an uncertainty source , How cal i find out the limit? how do i know which probability distribution it follows?
Thanks in advance
i have devised extensometer calibration apparatus using a electronic probe( works like a plunger type dial guage, but gives a voltage out put based on the displacement of the plunger) and DRO(Digital Read Out, it is didgital indicator). I have used a coaxial spindle in the apparatus.The working is simple.Extensometer is clamped on the spindle.When i rotate a screw , spindle moves upward, which in turn presses the probe. the the DRO ( indicator) will show the displacement in microns. It has got a resolution of 0.1 micron.The apparatus has got an uncertainty of 0.0004mm (k=2, 95.45% confidence level, )...........
1.My question is what is the uncertainty budget for the extensometer calibration? i need information about the various sources of uncertainty that can contribute to the above mentioned calibration.
2.Suppose if resolution of extensometer is 0.001mm, and if it is found to be an uncertainty source , How cal i find out the limit? how do i know which probability distribution it follows?
Thanks in advance