JPS6449941A - Chlorophyl meter - Google Patents
Chlorophyl meterInfo
- Publication number
- JPS6449941A JPS6449941A JP20679687A JP20679687A JPS6449941A JP S6449941 A JPS6449941 A JP S6449941A JP 20679687 A JP20679687 A JP 20679687A JP 20679687 A JP20679687 A JP 20679687A JP S6449941 A JPS6449941 A JP S6449941A
- Authority
- JP
- Japan
- Prior art keywords
- deviation
- measured values
- average value
- arithmetic circuit
- plural
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To easily measure the average value of measured values at plural points in a farm and the deviation from a reference value by providing a means for calculating the average value of the plural measured values obtd. by measurement and means for calculating the deviation from the reference value. CONSTITUTION:The light rays emitted from a red light emitting diode 4 and an infrared ray emitting diode 5 are projected on a sample leaf and the light rays transmitted therethrough are detected by a light receiving element 6. The concn. of the chlorophyl in the leaf is computed by an arithmetic circuit 21 in accordance with the measured quantity of the transmitted light and the plural measured values obtd. by the calculation are stored into the RAM in the arithmetic circuit 21. An average value calculation mode is set and the average value of the measured values stored in the above-mentioned RAM is calculated when the average value switch in a switch 29 is pushed. The arithmetic circuit 21 calculates the deviation between the previously inputted reference value and the measured values mentioned above when the mode is set at a deviation calculation mode. The calculated deviation is displayed by a display element 31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20679687A JPS6449941A (en) | 1987-08-20 | 1987-08-20 | Chlorophyl meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20679687A JPS6449941A (en) | 1987-08-20 | 1987-08-20 | Chlorophyl meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6449941A true JPS6449941A (en) | 1989-02-27 |
Family
ID=16529241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20679687A Pending JPS6449941A (en) | 1987-08-20 | 1987-08-20 | Chlorophyl meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6449941A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5424840A (en) * | 1992-07-21 | 1995-06-13 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | In situ chlorophyl absorption meter |
| US5614344A (en) * | 1994-06-14 | 1997-03-25 | Canon Kabushiki Kaisha | Toner for developing electrostatic images and image forming method |
| FR2827383A1 (en) * | 2001-07-13 | 2003-01-17 | Univ Paris 7 Denis Diderot | Radiometry device for determining biochemical content of leaves in situ |
| CN1293379C (en) * | 2004-06-30 | 2007-01-03 | 中国农业大学 | System and method for portable non-destructive detecting plant pigment in fields |
| CN100462712C (en) * | 2005-08-03 | 2009-02-18 | 北京农业信息技术研究中心 | Non-destructive detecting method and detecting instrument for portable plant nitrogen and water content |
| JP2009109363A (en) * | 2007-10-30 | 2009-05-21 | Nagasaki Prefecture | Method and device for measuring water stress of plant |
| EP2453221A1 (en) | 2010-11-15 | 2012-05-16 | Institut De Physique Du Globe De Paris (Établissement Public À Caractère Scientifique Et Technologique) | Apparatus for radiometry to determine the physico-chemical properties of a sample taking the thickness into account |
| EP2453222A1 (en) | 2010-11-15 | 2012-05-16 | Institut De Physique Du Globe De Paris (Établissement Public À Caractère Scientifique Et Technologique) | Apparatus and method for radiometry to determine the physico-chemical properties of a sample |
| JP2021056146A (en) * | 2019-09-30 | 2021-04-08 | 国立大学法人 奈良先端科学技術大学院大学 | Plant sensing device and real-time plant monitoring system |
-
1987
- 1987-08-20 JP JP20679687A patent/JPS6449941A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5424840A (en) * | 1992-07-21 | 1995-06-13 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | In situ chlorophyl absorption meter |
| US5614344A (en) * | 1994-06-14 | 1997-03-25 | Canon Kabushiki Kaisha | Toner for developing electrostatic images and image forming method |
| FR2827383A1 (en) * | 2001-07-13 | 2003-01-17 | Univ Paris 7 Denis Diderot | Radiometry device for determining biochemical content of leaves in situ |
| WO2003006960A1 (en) * | 2001-07-13 | 2003-01-23 | Universite Paris 7 - Denis Diderot | Radiometric device and method for determining in situ the biochemical content of leaves, and portable apparatus comprising same |
| CN1293379C (en) * | 2004-06-30 | 2007-01-03 | 中国农业大学 | System and method for portable non-destructive detecting plant pigment in fields |
| CN100462712C (en) * | 2005-08-03 | 2009-02-18 | 北京农业信息技术研究中心 | Non-destructive detecting method and detecting instrument for portable plant nitrogen and water content |
| JP2009109363A (en) * | 2007-10-30 | 2009-05-21 | Nagasaki Prefecture | Method and device for measuring water stress of plant |
| EP2453221A1 (en) | 2010-11-15 | 2012-05-16 | Institut De Physique Du Globe De Paris (Établissement Public À Caractère Scientifique Et Technologique) | Apparatus for radiometry to determine the physico-chemical properties of a sample taking the thickness into account |
| EP2453222A1 (en) | 2010-11-15 | 2012-05-16 | Institut De Physique Du Globe De Paris (Établissement Public À Caractère Scientifique Et Technologique) | Apparatus and method for radiometry to determine the physico-chemical properties of a sample |
| JP2021056146A (en) * | 2019-09-30 | 2021-04-08 | 国立大学法人 奈良先端科学技術大学院大学 | Plant sensing device and real-time plant monitoring system |
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