measurement system (sensor) Advance physics

A tactile sensor is a sensor that measures information derived from physical interaction with its environment. Strain gauges can be used to construct tactile sensors; in one application strain gauges are mounted on a robot to detect contact with the environment. Two strain gauges of constantan are mounted on the top of a finger surface so that both are strained simultaneously. Each gauge has a gauge factor 2. I, resistance 350 (2 and maximum power dissipation 20 mW. The sensors are inserted into a Wheatstone bridge with a supply voltage V.=5 V, and the signal is measured with a voltmeter, which has an inpul impedance of 10 MO and a ('MRR of 90 dB. a) At what positions should the sensors he inserted in figure 3.1? Motivate your answer by showing the potential changes at A and 13. b) Determine if the supply voltage is within the safe limit. (3p) c) There is a normal (series) mode interference signal of 10 uV due to a Sccbock voltage, Calculate the minimum signal size (Un) required to obtain a signal-to-noise (SNR) ratio larger than 50 dB3. V-5.0 V 22