Abstract
This paper aims to measure the contact area of rubber spheres and oranges compressed against parallel rigid and flat plates. To measure this area a system composed of a transducer, an interface device and a microcomputer was used. The transducer is composed of a board on which some micro-switches were disposed in a linear and radial direction spaced 0.5 mm from each other. As the contact area was expanding, the micro-switches connected to the interface turned on, forming the bits that compose the binary word that measures the diameter of the area. The data acquisition system is in-charge of recording the measured area, as function of the deformation imposed to the spheres and to the orange fruit. The obtained area as a function of deformation was compared with the data reported by Linares, 1996.
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