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1. (WO2017150213) MOISTURE CONTENT OBSERVATION DEVICE, MOISTURE CONTENT OBSERVATION METHOD, AND CULTIVATION DEVICE

Pub. No.:    WO/2017/150213    International Application No.:    PCT/JP2017/005863
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Feb 18 00:59:59 CET 2017
IPC: G01N 21/359
A01G 7/00
A01G 27/00
G01N 21/27
G01N 21/3554
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: FUJIYAMA Takeshi
藤山 毅
TERASHIMA Yuuji
寺島 祐二
Title: MOISTURE CONTENT OBSERVATION DEVICE, MOISTURE CONTENT OBSERVATION METHOD, AND CULTIVATION DEVICE
Abstract:
A first projection light source radiates 905 nm near-infrared light, which has the characteristic of not being readily absorbed by moisture, as reference light toward leaves of a plant. A second projection light source radiates 1550 nm near-infrared light, which has the characteristic of being readily absorbed by moisture, as measuring light toward the leaves of the plant. A threshold setting/moisture index detection processing unit calculates a moisture index for one leaf, which is the sum of reflection intensity ratios ΣLn (I905/I1550). A control unit displays on a UI screen of a monitor a graph representing the total moisture content in the leaves and a pixel average value thereof, as time-series transitions in the moisture content contained in the plant leaves from the start of a measuring period. A white background plate covering the rear surface of the plant leaf, as seen from the first projection light source and the second projection light source, is arranged on the plant leaf.