METHOD FOR JUDGING DEGREE OF MATURITY OF TOMATO OR THE LIKE

PURPOSE:To prevent the irregularity of judge accuracy or a lowering of efficiency, by determining a degree of maturity on the basis of the correlation of a degree of coloration between a fruit apex and a fruit body part. CONSTITUTION:A fruit to be measured such as a tomato is placed on the receiving...

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Bibliographic Details
Main Authors TSURUMI MANABU, MORI KENTARO, TAMIMOTO HIROTOSHI, UMEDA SHIGEO
Format Patent
LanguageEnglish
Published 13.10.1988
Subjects
COLORIMETRY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:PURPOSE:To prevent the irregularity of judge accuracy or a lowering of efficiency, by determining a degree of maturity on the basis of the correlation of a degree of coloration between a fruit apex and a fruit body part. CONSTITUTION:A fruit to be measured such as a tomato is placed on the receiving plate 3 of a sorting conveyor 1 so as to turn a peduncle part downwardly to be transferred. On the way of transfer, in order to detect a surface color, fluorescent lamps 7 as light sources are provided before and behind a screen plate 6 having a tomato passing notch part 5 formed thereto and a detection apparatus 4 having color sensors 8, 9, 10, 11, 12, 13 arranged thereto is provided to one side surface of the screen plate 6. A degree-of-coloration index Cm(m=1, 2) is calculated from the average values V1, V2, V3, V4, V5, V6 of the detection values of the color sensors 8-13 according to formulae I, II. A degree of maturity is judged depending upon which region of a relation graph of the degree-of- coloration index preliminarily calculated from experimental data and hue the calculated degree-of-coloration that index belongs to. By this method, the degree of maturity can be estimated with good accuracy.
Bibliography:Application Number: JP19870081908