Question: Suppose a door-opening sensor is made from a large sheet of PZT (d= 30 pC/N) piezoelectric film (thickness 0.1 mm, area 1 meter x 1

Suppose a door-opening sensor is made from a large sheet of PZT (d= 30 pC/N) piezoelectric film (thickness 0.1 mm, area 1 meter x 1 meter).

a) How much voltage is measured when a 75 kg person stands on the mat?

b) Does it make any difference how big this person's feet are?

c) Regarding a reference paper (Reference: A self-powered intelligent glove for real-time human-machine gesture interaction based on piezoelectric effect of T-ZnO/PVDF film), (1) draw and explain the fabrication process (2) explain the sensing mechanism (3) what is the piezoelectric coefficient (pC/N)? Using the value, what is the voltage of the question (a) using T-ZnO/PVDF film (4) Describe three pros and const of PZT sensors and PVDF sensors.

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