Q3 (a) (0) With the aid of a suitable sketch and in your own words, outline the basic characteristics of strain gauges a

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Q3 A 0 With The Aid Of A Suitable Sketch And In Your Own Words Outline The Basic Characteristics Of Strain Gauges A 1 (138.93 KiB) Viewed 37 times

Q3 (a) (0) With the aid of a suitable sketch and in your own words, outline the basic characteristics of strain gauges and explain why they are widely used in industrial weighing systems. [5 marks] (ii) A strain gauge is used as a sensor to convert the weight of an object into a voltage signal through an interfacing circuit, as shown in Figure 3.1. R, is the resistance of the strain gauge whilst R₁ = 1 k2 and Voo = 5 V. Derive an equation for the output of the circuit (Vo). With the aid of a suitable sketch, discuss the linearity of the circuit in relation to the weight. [5 marks] Voo R₁ OV Figure 3.1 (b) In your own words, explain why the circuit shown in Figure 3.2 is regarded as a logical inverter. Comment on the performance of the circuit if the MOSFET is replaced with a bipolar transistor. [5 marks] VDO Strain gauge RD V, OV Figure 3.2