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1.发明申请公开(公告)号：US20210084846A1
公开(公告)日：2021-03-25
申请号：US17115105
申请日：2020-12-08
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: A01G27/00 , G01N21/3554 , G01N21/359 , G01N21/84 , G01N33/00
Abstract: First beam source radiates a near infrared reference beam of 905 nm, in which light tends not to be absorbed in water toward a leaf of a plant. Second beam source radiates a near infrared measuring beam of 1550 nm, in which light tends to be absorbed in water toward the leaf of the plant. Threshold level setter/water content index detector calculates a water content index of one leaf as a total sum ΣLn(I905/I1550) of the reflection intensity ratio. Controller displays a graph representing a total sum of water content of the leaf and a pixel average value as a time-transition of the water content contained in the plant from the start of the measurement period on a UI screen of a monitor. Viewed from the first and second beam sources, a white reference substrate covering a back surface of the leaf is disposed on the leaf of the plant.
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公开(公告)号：US20180284016A1
公开(公告)日：2018-10-04
申请号：US15525431
申请日：2016-03-02
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA , Kazuhiro YANAGI
IPC: G01N21/359 , A01G7/04 , A01H3/02
CPC classification number: G01N21/359 , A01G7/04 , A01G7/045 , A01H1/04 , A01H3/02 , G01N21/3151 , G01N21/3554 , Y02P60/146
Abstract: There is provided a plant stress detection apparatus including a first light source that radiates a reference beam of a first wavelength that has a characteristic of tending not to be absorbed in water toward a plant by optical scanning, a second light source that radiates a measuring beam of a second wavelength that has a characteristic of tending to be absorbed in water toward the plant by optical scanning, and a detector that detects presence or absence of water or undulation of the plant based on reflection light of the reference beam that is reflected at an irradiation position of the plant that has a first irradiation area and reflection light of the measuring beam that is reflected at an irradiation position of the plant that has a second irradiation area that is different from the first irradiation area.
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3.发明申请公开(公告)号：US20200309687A1
公开(公告)日：2020-10-01
申请号：US15779759
申请日：2016-10-21
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , A01G25/16 , G01N21/359 , G01N21/3563 , G01N21/84 , G01N21/47
Abstract: A first beam source radiates, as a reference beam, 905 nm of near infrared beam having a characteristic in which light tends not to be absorbed in water toward a leaf of a plant. A second beam source radiates, as a measuring beam, 1550 nm of near infrared beam having a characteristic in which light tends to be absorbed in water toward the leaf of the plant. A threshold level setter/water content index detector calculates a water content index of one leaf which is a total sum Σ Ln (I905/I1550) of the reflection intensity ratio. A controller displays a graph representing the time-serial change of the water content contained in the plant from the start to the end of the measurement period on a UI screen of a monitor. Further, the controller is connected to an environmental control device that controls environmental conditions surrounding the plant, and instructs the control device to change or maintain the environmental conditions based on a change of increase and decrease in the water content contained in the calculated plant.
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4.发明申请公开(公告)号：US20170115210A1
公开(公告)日：2017-04-27
申请号：US15295065
申请日：2016-10-17
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , G01N21/359 , G01N21/84
CPC classification number: G01N21/3554 , G01N21/3151 , G01N21/359 , G01N21/4738 , G01N21/84 , G01N2021/3155 , G01N2021/8466
Abstract: In a water content evaluation method, when water content of a part of a plant is evaluated, a white reference substrate (background material) is disposed so as to cover a back surface of a leaf of plant. A first beam source radiates a near infrared beam (reference beam) with a wavelength of 905 nm that has a characteristic of tending not to be absorbed in water toward leaf. A second beam source radiates a near infrared beam (measuring beam) with a wavelength of 1550 nm that has a characteristic of tending to be absorbed in water toward the leaf. Threshold level setter/water content index detector calculates a water content index of one leaf that is total sum Σ Ln (I905/I1550) of the reflection intensity rate at all irradiation positions of the leaf based on a reflection light of a reference beam and a reflection light of a measuring beam that are reflected on all irradiation positions of the leaf.
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5.发明申请公开(公告)号：US20210239608A1
公开(公告)日：2021-08-05
申请号：US17233966
申请日：2021-04-19
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , A01G25/16 , G01N21/3563 , G01N21/359 , G01N21/47 , G01N21/84
Abstract: A cultivation device for watering plants is provided. The cultivation device includes a light source configured to irradiate a plant and a processor. The processor calculates an amount of water contained in the plant based on reflection light of the light reflected by the plant in a certain measurement period, and irrigates the plant with a predetermined amount of water according to the calculated amount of water contained in the plant.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190041325A1
公开(公告)日：2019-02-07
申请号：US16155357
申请日：2018-10-09
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , G01N21/84 , G01N21/359 , G01N21/31 , G01N21/47
Abstract: A water content evaluation apparatus which evaluates water content of a part of a plant is provided. A water content at each of irradiation positions of the part of the plant is calculated based on a first reflection light of a laser reference beam, having a first wavelength that is not absorbed by water, that is reflected at all the irradiation positions of the plant and a second reflection light of a laser measuring beam, having a second wavelength that is absorbed by water, that is reflected at all the irradiation positions of the plant. Irradiation positions of the plant in which the water content is equal to or larger than at least one predetermined threshold level are displayed, in at least one corresponding predetermined color.
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7.发明申请公开(公告)号：US20180372624A1
公开(公告)日：2018-12-27
申请号：US16065892
申请日：2017-02-20
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , A01G27/00
Abstract: A threshold level setter/water content index detector calculates an ΣLn (I905/I1550) which is a total sum of the reflection intensity ratio as a water content index of one leaf. A controller displays a graph representing the time-transition of the water content contained in the leaf of the plant from the start to the end of the measurement period on a UI screen of monitor 50. The controller fixedly determines and sets, as a leaf, a set of reflection positions where the water content for each reflection position which is calculated at the start of the measurement period exceeds a threshold level. When viewed from first beam source and second beam source, white reference substrate which covers a back surface of the leaf of the plant is disposed on the leaf of the plant.
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8.发明申请公开(公告)号：US20200236877A1
公开(公告)日：2020-07-30
申请号：US16066216
申请日：2017-02-17
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: A01G27/00 , G01N21/3554 , G01N21/359 , G01N21/84 , G01N33/00
Abstract: First beam source radiates a near infrared reference beam of 905 nm, in which light tends not to be absorbed in water toward a leaf of a plant. Second beam source radiates a near infrared measuring beam of 1550 nm, in which light tends to be absorbed in water toward the leaf of the plant. Threshold level setter/water content index detector calculates a water content index of one leaf as a total sum Σ Ln(I905/I1550) of the reflection intensity ratio. Controller displays a graph representing a total sum of water content of the leaf and a pixel average value as a time-transition of the water content contained in the plant from the start of the measurement period on a UI screen of a monitor. Viewed from the first and second beam sources, a white reference substrate covering a back surface of the leaf is disposed on the leaf of the plant.
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9.发明申请公开(公告)号：US20190265162A1
公开(公告)日：2019-08-29
申请号：US16074285
申请日：2017-05-11
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA , Hisahiro TANAKA
IPC: G01N21/3554 , G01N21/359 , G01N21/27 , A01G7/04 , G06T7/00
Abstract: A true leaf and a plurality of artificial leaves are attached on a white reference substrate. A first light source radiates a reference beam of 905 nm while sequentially scanning toward the white reference substrate. A second light source radiates a measuring beam of 1550 nm while sequentially scanning toward the white reference substrate. A threshold level setter/water content index detector calculates a relative water content of a true leaf based on the intensity of each reflection light of the reference beam and the measuring beam which are respectively reflected by the true leaf and a plurality of artificial leaves.
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10.发明申请公开(公告)号：US20190204214A1
公开(公告)日：2019-07-04
申请号：US16297068
申请日：2019-03-08
Inventor： Takeshi FUJIYAMA , Yuuji TERASHIMA
IPC: G01N21/3554 , G01N21/31 , G01N21/84 , G01N21/359
CPC classification number: G01N21/3554 , G01N21/3151 , G01N21/359 , G01N21/4738 , G01N21/84 , G01N2021/3155 , G01N2021/8466
Abstract: A water content evaluation apparatus which evaluates water content of a part of an object is provided. A water content at each of irradiation positions of the part of the object is calculated based on a first reflection light of a laser reference beam, having a first wavelength that is not absorbed by water, that is reflected at all the irradiation positions of the object and a second reflection light of a laser measuring beam, having a second wavelength that is absorbed by water, that is reflected at all the irradiation positions of the object. Irradiation positions of the object in which the water content is equal to or larger than at least one predetermined threshold level are output.
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