Draw and explain strain guage accelerometer.

Draw and explain strain guage accelerometer.
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1 Answer

Answer :

Ans: Diagram:

image

Explanation The seismic mass is placed on the cantilever beam placed inside the housing . The housing is filled with fluid to create damping force. The strain gauges of same type are placed on both the top and bottom surface of cantilever beam as shown in fig. 

If any force acting on housing frame, the corresponding displacement by the mass will take place inside the housing . Owing to this, the mass is displaced from original place, which is sensed by strain gauges placed over the cantilever beam. Therefore, the change in resistance occur in strain gauges due to mass displacement according to Wheatstone bride circuit. At the same time, a damping force of the fluid by mass displacement. Owing to both mass displacement and damping force of the fluid, the beam bends, which produces strain on the beam. This strain is directly proportional to the acceleration. 

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