If you know that any strain gauge has a sensitivity towards temperature. In other words, any change in the temperature could also affect the resistance value. How can we get a correct reading from strain gauges and get rid of the temperature effect? ii. In an AC LVDT system, measuring the output voltage alone gives an indication of the displacement from the center, but not the direction of displacement. Explain why, and also explain a method for solving this problem. iii. In a vortex flow meter, there are many methods that could be used to measure the effect of vortices and measure the flow rate. Explain how vortices could occur in this flow meter, and explain three methods that could be used for measuring the effects of vortices in a vortex flow meter.
i. If you know that any strain gauge has a sensitivity towards temperature.
In other words, any change in the temperature could also affect the
resistance value. How can we get a correct reading from strain gauges
and get rid of the temperature effect?
ii. In an AC LVDT system, measuring the output voltage alone gives an
indication of the displacement from the center, but not the direction of
displacement. Explain why, and also explain a method for solving this
problem.
iii. In a vortex flow meter, there are many methods that could be used to
measure the effect of vortices and measure the flow rate. Explain how
vortices could occur in this flow meter, and explain three methods that
could be used for measuring the effects of vortices in a vortex flow
meter.
iv. Explain in details how can we use a capacitor to indicate the lever of
water in a tank (use drawings and electrical diagram to elaborate on your
explanation).
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v. Bimetallic strip could be used as a temperature detector. Explain its
working principle and show how it could be used to protect motors from
high currents
vi. Photo-transistors, photodiodes and photoconductive cells could be used
as light detectors. create a table and show the main differences between
them.
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