Title:
MOISTURE CONTENT OBSERVATION DEVICE, MOISTURE CONTENT OBSERVATION METHOD, AND CULTIVATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/150213
Kind Code:
A1
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.
Inventors:
FUJIYAMA TAKESHI
TERASHIMA YUUJI
TERASHIMA YUUJI
Application Number:
PCT/JP2017/005863
Publication Date:
September 08, 2017
Filing Date:
February 17, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01N21/359; A01G7/00; A01G27/00; G01N21/27; G01N21/3554
Foreign References:
| JPH03221843A | 1991-09-30 | |||
| JP2009122083A | 2009-06-04 | |||
| JP2016000024A | 2016-01-07 | |||
| JP2005308733A | 2005-11-04 | |||
| JPH1090066A | 1998-04-10 |
Other References:
See also references of EP 3425372A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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