Answer to Question #125458 in Electrical Engineering for Deivasigamani

Question #125458
A piezoresistive accelerometer has the following properties and inputs:

Axial acceleration = 75 g’s

Maximum temperature effect on sensitivity = 10%

Sensitivity = 0.4 mV/g

What is the maximum reading of the axial acceleration in mV that the accelerometer may measure?
1
Expert's answer
2020-07-09T14:57:43-0400

The axial acceleration is "75g". The sensitivity is "0.4\\text{ mV}\/g."

Thus, the maximum reading of the axial acceleration in mV that the accelerometer may measure without temperature effects on sensitivity is


"R=75g\\cdot0.4\\text{ mV}\/g=30\\text{ mV}."

On the other hand, due to temperature effects the measurements can be 10% higher unless the readings are 30 mV. It means that the maximum possible reading of the axial acceleration with temperature effects on sensitivity is


"R_t=1.1R=33\\text{ mV}."

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