Development of Simple Density Measurement System for Watermelons
Choi, K.H.;Lee, K.J.;Choi, D.S.;Kim, G.;Son, J.R.(National Institute of Agricultural Engineering, RDA, Suwon, Republic of Korea)E-mail:[email protected]
Density is a physical property which contains information relating to the internal quality of fruits and vegetables, and can be used as an index for nondestructive quality evaluation. Density sorting has been employed by farmers for some agricultural products since ancient times. In this study, an automatic density measuring system based on the platform scale or water displacement method was developed for density sorting of watermelon. It consisted of water tan, load cell, net tray, electric motor, limit switch, control system and its program. The resolution of density was 0.001 g/㎤. In order to calibrate and evaluate the accuracy, the density was measured using a balloon kept in cold water.
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