SE8403364L - METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES - Google Patents

METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES

Info

Publication number
SE8403364L
SE8403364L SE8403364A SE8403364A SE8403364L SE 8403364 L SE8403364 L SE 8403364L SE 8403364 A SE8403364 A SE 8403364A SE 8403364 A SE8403364 A SE 8403364A SE 8403364 L SE8403364 L SE 8403364L
Authority
SE
Sweden
Prior art keywords
signal
emitting
vegetables
death
signals
Prior art date
Application number
SE8403364A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8403364D0 (en
SE443050B (en
Inventor
A Wallenas
C Tyren
Original Assignee
Enpece Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enpece Ab filed Critical Enpece Ab
Priority to SE8403364A priority Critical patent/SE443050B/en
Publication of SE8403364D0 publication Critical patent/SE8403364D0/en
Priority to AU45479/85A priority patent/AU4547985A/en
Priority to EP19850903430 priority patent/EP0215795A1/en
Priority to PCT/SE1985/000261 priority patent/WO1986000420A1/en
Publication of SE8403364L publication Critical patent/SE8403364L/en
Publication of SE443050B publication Critical patent/SE443050B/en
Priority to DK86586A priority patent/DK86586A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers

Abstract

In a method and a device for non-contact detection of plants (31), reflected light (6) is collected from a surface (5) by means of an optical system (7). The reflected light (6) is devided by means of a beam splitter (13) into two light beams (14, 15) each of which is filtered by an interference filter (16, 17) to a respective predetermined wavelength. Two photodiodes (18, 19) convert a respective wavelength (14, 15) into an electric signal (20, 21), each of these signals being amplified in a respective operational amplifier (22, 23). A divider (26) receives the two signals (20, 21) and divide them for emitting a ratio signal (27). This ratio signal (27) is compared in a comparator (28) with a preselected reference signal (29) for emitting an output signal (30) which indicates the presence/non presence of a plant (31) on the surface.
SE8403364A 1984-06-25 1984-06-25 METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES SE443050B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE8403364A SE443050B (en) 1984-06-25 1984-06-25 METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES
AU45479/85A AU4547985A (en) 1984-06-25 1985-06-24 Method and device for non-contact detection of plants
EP19850903430 EP0215795A1 (en) 1984-06-25 1985-06-24 Method and device for non-contact detection of plants
PCT/SE1985/000261 WO1986000420A1 (en) 1984-06-25 1985-06-24 Method and device for non-contact detection of plants
DK86586A DK86586A (en) 1984-06-25 1986-02-25 PROCEDURE AND APPARATUS FOR CONTACT-DETECTED GROWTH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8403364A SE443050B (en) 1984-06-25 1984-06-25 METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES

Publications (3)

Publication Number Publication Date
SE8403364D0 SE8403364D0 (en) 1984-06-25
SE8403364L true SE8403364L (en) 1985-12-26
SE443050B SE443050B (en) 1986-02-10

Family

ID=20356330

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8403364A SE443050B (en) 1984-06-25 1984-06-25 METHOD AND APPARATUS FOR DEATH-FREE DETECTION OF VEGETABLES

Country Status (5)

Country Link
EP (1) EP0215795A1 (en)
AU (1) AU4547985A (en)
DK (1) DK86586A (en)
SE (1) SE443050B (en)
WO (1) WO1986000420A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909434A1 (en) * 1988-07-27 1990-02-01 Georg Diamantidis DEVICE FOR THE VISUAL VIEW OF CHLOROPHYLL FLUORESCENCE IN THE ENVIRONMENT
AU632326B2 (en) * 1989-05-09 1992-12-24 Biggs & Sons Pty. Limited Detection system
US5296702A (en) † 1992-07-28 1994-03-22 Patchen California Structure and method for differentiating one object from another object
KR20040012255A (en) * 2002-08-02 2004-02-11 대한민국(관리부서:농촌진흥청) Chlorophyll content measuring apparatus
DE10239129A1 (en) * 2002-08-27 2004-03-11 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Device for the contactless determination of the vegetation of a field section
DE102006002437A1 (en) * 2006-01-11 2007-07-12 Agrocom Gmbh & Co. Agrarsysteme Kg Measuring device for agricultural harvester, has optical sensor system that detects chlorophyll content of cultivated plants during harvesting process, and evaluation unit that generates weed signal
CA2760448C (en) * 2009-04-29 2017-04-11 Monsanto Technology Llc Biometric measurement systems and methods

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009393A (en) * 1977-09-16 1979-06-13 Pickett A J F Photoelectric investigation of crops
US4308456A (en) * 1979-11-19 1981-12-29 Versatile Integrated Modules Method and apparatus for measuring the frequency of radiation

Also Published As

Publication number Publication date
DK86586D0 (en) 1986-02-25
EP0215795A1 (en) 1987-04-01
AU4547985A (en) 1986-01-24
DK86586A (en) 1986-02-25
SE8403364D0 (en) 1984-06-25
WO1986000420A1 (en) 1986-01-16
SE443050B (en) 1986-02-10

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