EP4102955A1 - Device and method for acquiring data regarding at least one plant - Google Patents

Device and method for acquiring data regarding at least one plant

Info

Publication number
EP4102955A1
EP4102955A1 EP21712945.1A EP21712945A EP4102955A1 EP 4102955 A1 EP4102955 A1 EP 4102955A1 EP 21712945 A EP21712945 A EP 21712945A EP 4102955 A1 EP4102955 A1 EP 4102955A1
Authority
EP
European Patent Office
Prior art keywords
sensor
plant
light
view
camera
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
Application number
EP21712945.1A
Other languages
German (de)
French (fr)
Inventor
Hans-Georg Luigs
Sascha Holzschneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4102955A1 publication Critical patent/EP4102955A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general

Definitions

  • the invention relates to a device and a method for acquiring data on at least one plant with at least one sensor that records an image of the plant.
  • the invention relates to the acquisition of data from a rhizotron.
  • a rhizotron is a plant container filled with soil with a transparent pane. The roots of the plant can be observed through this disk. The plant container is positioned at an angle so that the roots grow along the disc. This growth is recorded with a camera at several points in time. In this case, the roots are the part of the plant from which data is collected.
  • a major problem is the homogeneous illumination of the entire rhizotron disc and reflections.
  • the rhizotron disk was illuminated as homogeneously as possible, diffuse, or a homogeneous background behind the camera was illuminated and reflected in the direction of the rhizotron disk.
  • the invention has a special LED strip that is attached in a special way.
  • the LED strip preferably consists of several very bright LEDs with an ancillary lens.
  • the additional lens in front of each LED ensures that almost all light falls only on the rhizotron disc and that the background remains relatively dark. In this way,
  • CONFIRMATION COPY The reflections from the camera background are minimized as they are hardly illuminated. If the rhizotron disc is illuminated by at least two LED strips, a homogeneous illumination is established. The LEDs in each LED strip are so close to one another that the pane is illuminated evenly vertically. It is therefore proposed that light strips are arranged on at least two sides of the sensor.
  • any imaging device can be used as a sensor. It is proposed that the sensor is a camera or has a camera.
  • the light bar can only have an LED with an additional lens. However, it is advantageous if it has several LEDs arranged next to one another.
  • the brightness of the LED can be variable and, for example, the brightness can be increased by switching on LEDs and individual LEDs can be switched off in order to reduce the brightness. However, it is advantageous if the brightness can be dimmed and, in particular, is even continuously dimmable.
  • the recording time of the sensor should also be variable and preferably even stepless.
  • the brightness should be selected so that the contrast between the roots and the soil is clearly visible even with fine roots.
  • the recording time of the camera is also important. The recording time of the camera is limited at the bottom by the brightness of the roots to be maximized and at the top by the wish that the earth appears as dark as possible.
  • An advantageous embodiment variant provides that several LEDs have lenses that direct the light onto the field of view. It is also proposed that the light strip is supplied with a constant current. The LEDs should not be operated with maximum current in order to avoid excessive heating including the heat sink. A control of the LEDs with constant current and not with pulse width modulation is suggested, since otherwise the camera would detect fluctuations in brightness in the image, especially in the case of short exposure times.
  • Figure 1 shows a plan view of an arrangement according to the invention with LED strips
  • FIG. 2 shows a side view of the arrangement shown in FIG. 1 from a camera perspective
  • FIG. 3 shows a root image before the lighting optimization of the LED lighting from the side with clear reflections on the rhizon disk and poor contrast between roots and soil and
  • FIG. 4 shows a root image after the lighting optimization.
  • the top view shown in Figure 1 of the device 1 for capturing data from a plant has a sensor 2, which is a camera in the exemplary embodiment.
  • This camera is aimed at a field of view 3, which in the present case is a rhizotron disk, behind which the roots of a plant in soil (not shown) are visible.
  • a light strip 4, 5 is arranged on each side.
  • the light strips each have a large number of LEDs 6 to 15 arranged one below the other, the light of which is directed onto the field of view 3 via ancillary lenses 17 to 26.
  • the light strips 4, 5 are arranged on two sides 27, 28 of the sensor 2 in such a way that almost all of the light only falls on the field of view 3 and the background remains relatively dark. This minimizes reflections on the rhizotron disc.
  • FIG. 4 shows the plant 16, of which the roots can be seen behind the rhizotron disc.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A sensor in a device for acquiring data regarding at least one plant, said device having at least one sensor which records an image of the plant, is oriented towards a field of view and a light strip is arranged next to the sensor in such a way that the light is oriented towards the field of view with an ancillary lens. Reflections that could occur in the measurement range of the camera are thus avoided.

Description

Vorrichtung und Verfahren zum Erfassen von Daten zu mindestens einer Pflanze Device and method for acquiring data on at least one plant
[01] Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Erfassen von Daten zu mindestens einer Pflanze mit mindestens einem Sensor, der ein Abbild der Pflanze aufnimmt. The invention relates to a device and a method for acquiring data on at least one plant with at least one sensor that records an image of the plant.
[02] Insbesondere betrifft die Erfindung die Erfassung von Daten eines Rhizotrons. Ein Rhizotron ist ein mit Erde gefüllter Pflanzcontainer mit einer durchsichtigen Scheibe. Durch diese Scheibe können die Wurzeln der Pflanze beobachtet werden. Der Pflanzcontainer wird schräg gelagert, damit die Wurzeln an der Scheibe entlang wachsen. Dieses Wachstum wird zu mehreren Zeitpunkten mit einer Kamera aufgenommen. In diesem Fall sind somit die Wurzeln der Teil der Pflanze, von dem Daten erfasst werden. In particular, the invention relates to the acquisition of data from a rhizotron. A rhizotron is a plant container filled with soil with a transparent pane. The roots of the plant can be observed through this disk. The plant container is positioned at an angle so that the roots grow along the disc. This growth is recorded with a camera at several points in time. In this case, the roots are the part of the plant from which data is collected.
[03] Ein großes Problem bilden die homogene Ausleuchtung der gesamten Rhizo- tronscheibe und Spiegelungen. [03] A major problem is the homogeneous illumination of the entire rhizotron disc and reflections.
[04] Dieses Problem wird mit einer Vorrichtung mit den Merkmalen des Patentanspruchs 1 und einem Verfahren mit den Merkmalen des Patentanspruchs 10 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche. This problem is solved with a device having the features of claim 1 and a method having the features of claim 10. Advantageous further developments are the subject of the subclaims.
[05] Bisher wurde die Rhizotronscheibe, um die Wurzeln sichtbar zu machen, möglichst homogen diffus beleuchtet oder ein homogener Hintergrund hinter der Kamera wurde beleuchtet und reflektierte in Richtung Rhizotronscheibe. [05] So far, in order to make the roots visible, the rhizotron disk was illuminated as homogeneously as possible, diffuse, or a homogeneous background behind the camera was illuminated and reflected in the direction of the rhizotron disk.
[06] Die Erfindung weist eine spezielle LED-Leiste auf, die auf besondere Art angebracht ist. The invention has a special LED strip that is attached in a special way.
[07] Die LED-Leiste besteht vorzugsweise aus mehreren sehr hellen LEDs mit einer Vorsatzlinse. Die Vorsatzlinse vor jeder LED stellt sicher, dass fast alles Licht nur auf die Rhizotronscheibe fällt und der Hintergrund relativ dunkel bleibt. So werden mögli- [07] The LED strip preferably consists of several very bright LEDs with an ancillary lens. The additional lens in front of each LED ensures that almost all light falls only on the rhizotron disc and that the background remains relatively dark. In this way,
BESTÄTIGUNGSKOPIE che Spiegelungen aus dem Kamerahintergrund minimiert, da sie kaum beleuchtet werden. Wenn die Rhizotronscheibe von mindestens zwei LED-Leisten beleuchtet wird, stellt sich eine homogene Ausleuchtung ein. Die LEDs in jeder LED-Leiste sind so dicht untereinander angebracht, dass die Scheibe auch vertikal homogen ausgeleuchtet wird. Es wird daher vorgeschlagen, dass an zumindest zwei Seiten des Sensors Lichtleisten angeordnet sind. CONFIRMATION COPY The reflections from the camera background are minimized as they are hardly illuminated. If the rhizotron disc is illuminated by at least two LED strips, a homogeneous illumination is established. The LEDs in each LED strip are so close to one another that the pane is illuminated evenly vertically. It is therefore proposed that light strips are arranged on at least two sides of the sensor.
[08] Dabei sollte darauf geachtet werden, dass die Lichtleiste gegenüber der Pflanze so angebracht ist, dass direkte Spiegelungen an dem Sensor vorbei gehen und so außerhalb des Messbereichs des Sensors sind. Die Positionierung der LEDs mit ihren Vorsatzlinsen sollte so gewählt werden, dass die Spiegelung des direkten Lichts nicht zurück auf den Sensor gespiegelt wird. Außerdem sollten die LED Linsen so ausgewählt werden, dass nur das ganze Rhizotron mit der richtigen Homogenität beleuchtet wird und kaum der Hintergrund. [08] Care should be taken to ensure that the light strip opposite the plant is attached in such a way that direct reflections go past the sensor and are thus outside the measuring range of the sensor. The positioning of the LEDs with their additional lenses should be chosen so that the reflection of the direct light is not reflected back onto the sensor. In addition, the LED lenses should be selected so that only the entire rhizotron is illuminated with the correct homogeneity and hardly the background.
[09] Die Kamera, LED-Leisten und Rhizotronscheibe sollten vorzugsweise so zueinander angebracht sein, dass direkte Spiegelungen in der Scheibe (nach dem Gesetz: Einfallswinkel=Ausfallswinkel) nicht zurück in die Kamera gespiegelt werden können. [09] The camera, LED strips and rhizotron disk should preferably be attached to each other in such a way that direct reflections in the disk (according to the law: angle of incidence = angle of reflection) cannot be reflected back into the camera.
[10] Als Sensor können beliebige bildgebende Einrichtungen verwendet werden. Es wird vorgeschlagen, dass der Sensor eine Kamera ist oder eine Kamera aufweist. [10] Any imaging device can be used as a sensor. It is proposed that the sensor is a camera or has a camera.
[11] Die Lichtleiste kann nur eine LED mit Vorsatzlinse aufweisen. Vorteilhaft ist es jedoch, wenn sie mehrere nebeneinander angeordnete LEDs aufweist. [11] The light bar can only have an LED with an additional lens. However, it is advantageous if it has several LEDs arranged next to one another.
[12] Die Helligkeit der LED kann variabel sein und beispielsweise kann durch Zuschaltung von LEDs die Helligkeit gesteigert werden und es können einzelne LEDs ausgeschaltet werden, um die Helligkeit zu verringern. Vorteilhaft ist es jedoch, wenn die Helligkeit dimmbar ist und insbesondere sogar stufenlos dimmbar ist. [12] The brightness of the LED can be variable and, for example, the brightness can be increased by switching on LEDs and individual LEDs can be switched off in order to reduce the brightness. However, it is advantageous if the brightness can be dimmed and, in particular, is even continuously dimmable.
[13] Entsprechend sollte auch die Aufnahmedauer des Sensors variierbar sein und vorzugsweise sogar stufenlos. [14] Die Helligkeit ist so zu wählen, dass der Kontrast zwischen Wurzel und Erde auch bei feinen Wurzeln gut sichtbar ist. Dazu ist auch die Aufnahmedauer der Kamera wichtig. Die Aufnahmedauer der Kamera wird nach unten von der zu maximierenden Helligkeit der Wurzel begrenzt und nach oben durch den Wunsch, dass die Erde möglichst dunkel erscheint. [13] Accordingly, the recording time of the sensor should also be variable and preferably even stepless. [14] The brightness should be selected so that the contrast between the roots and the soil is clearly visible even with fine roots. The recording time of the camera is also important. The recording time of the camera is limited at the bottom by the brightness of the roots to be maximized and at the top by the wish that the earth appears as dark as possible.
[15] Eine vorteilhafte Ausführungsvariante sieht vor, dass mehrere LEDs Linsen aufweisen, die das Licht auf das Sichtfeld ausrichten. Es wird ferner vorgeschlagen, dass die Lichtleiste mit einem konstanten Strom versorgt wird. Die LEDs sollten nicht mit Maximalstrom betrieben werden, um ihre starke Erhitzung incl. Kühlkörper zu vermeiden. Eine Ansteuerung der LEDs mit Konstantstrom und nicht mit Pulsweitenmodulation wird vorgeschlagen, da sonst, insbesondere bei geringen Exposurezeiten, die Kamera Helligkeitsschwankungen im Bild entdecken würde. [15] An advantageous embodiment variant provides that several LEDs have lenses that direct the light onto the field of view. It is also proposed that the light strip is supplied with a constant current. The LEDs should not be operated with maximum current in order to avoid excessive heating including the heat sink. A control of the LEDs with constant current and not with pulse width modulation is suggested, since otherwise the camera would detect fluctuations in brightness in the image, especially in the case of short exposure times.
[16] Ein vorteilhaftes Ausführungsbeispiel einer erfindungsgemäßen Anordnung ist in der Zeichnung dargestellt und wird im Folgenden beschrieben. Es zeigt [16] An advantageous embodiment of an arrangement according to the invention is shown in the drawing and is described below. It shows
Figur 1 zeigt eine Draufsicht auf eine erfindungsgemäße Anordnung mit LED- Leisten, Figure 1 shows a plan view of an arrangement according to the invention with LED strips,
Figur 2 eine Seitenansicht der in Figur 1 gezeigten Anordnung aus Kamerasicht,FIG. 2 shows a side view of the arrangement shown in FIG. 1 from a camera perspective,
Figur 3 ein Wurzelbild vor der Beleuchtungsoptimierung der LED-Beleuchtung von der Seite mit deutlichen Spiegelungen auf der Rhizonscheibe und mangelhaftem Kontrast zwischen Wurzeln und Erde und FIG. 3 shows a root image before the lighting optimization of the LED lighting from the side with clear reflections on the rhizon disk and poor contrast between roots and soil and
Figur 4 ein Wurzelbild nach der Beleuchtungsoptimierung. FIG. 4 shows a root image after the lighting optimization.
[17] Die in Figur 1 gezeigte Draufsicht auf die Vorrichtung 1 zum Erfassen von Daten einer Pflanze hat einen Sensor 2, der im Ausfuhrungsbeispiel eine Kamera ist. Diese Kamera ist auf ein Sichtfeld 3 ausgerichtet, das im vorliegenden Fall eine Rhizotron- scheibe ist, hinter der die Wurzeln einer Pflanze in Erde (nicht gezeigt) sichtbar sind. Neben dem Sensor 2 ist beidseits jeweils eine Lichtleiste 4, 5 angeordnet. Die Lichtleisten haben jeweils eine Vielzahl untereinander angeordneter LEDs 6 bis 15, deren Licht über Vorsatzlinsen 17 bis 26 auf das Sichtfeld 3 ausgerichtet ist. The top view shown in Figure 1 of the device 1 for capturing data from a plant has a sensor 2, which is a camera in the exemplary embodiment. This camera is aimed at a field of view 3, which in the present case is a rhizotron disk, behind which the roots of a plant in soil (not shown) are visible. In addition to the sensor 2, a light strip 4, 5 is arranged on each side. The light strips each have a large number of LEDs 6 to 15 arranged one below the other, the light of which is directed onto the field of view 3 via ancillary lenses 17 to 26.
[18] Die Lichtleisten 4, 5 sind an zwei Seiten 27, 28 des Sensors 2 so angeordnet, dass fast alles Licht nur auf das Sichtfeld 3 fällt und der Hintergrund relativ dunkel bleibt. Dadurch werden Spiegelungen auf der Rhizotronscheibe minimiert. The light strips 4, 5 are arranged on two sides 27, 28 of the sensor 2 in such a way that almost all of the light only falls on the field of view 3 and the background remains relatively dark. This minimizes reflections on the rhizotron disc.
[19] In der Figur 4 ist die Pflanze 16 gezeigt, von der die Wurzeln hinter der Rhizotronscheibe zu sehen sind. [19] FIG. 4 shows the plant 16, of which the roots can be seen behind the rhizotron disc.

Claims

Patentansprüche: Patent claims:
1. Vorrichtung (1) zum Erfassen von Daten zu mindestens einer Pflanze (16) mit mindestens einem Sensor (2), der ein Abbild der Pflanze (16) aufnimmt, dadurch gekennzeichnet, dass der Sensor (2) auf ein Sichtfeld (3) ausgerichtet ist und neben dem Sensor (2) mindestens eine Lichtleiste (4, 5) angeordnet ist, die mindestens eine LED (6 bis 15) aufweist, deren Licht mit mindestens einer Vorsatzlinse (17 bis 26) auf das Sichtfeld (3) ausgerichtet ist. 1. Device (1) for acquiring data on at least one plant (16) with at least one sensor (2) which records an image of the plant (16), characterized in that the sensor (2) points to a field of view (3) is aligned and next to the sensor (2) at least one light strip (4, 5) is arranged, which has at least one LED (6 to 15) whose light is aligned with at least one ancillary lens (17 to 26) on the field of view (3) .
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass an zumindest zwei Seiten (27,28) des Sensors (2) Lichtleisten (4, 5) angeordnet sind. 2. Device according to claim 1, characterized in that light strips (4, 5) are arranged on at least two sides (27, 28) of the sensor (2).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Lichtleiste (4, 5) gegenüber der Pflanze (16) so angebracht ist, dass direkte Spiegelungen an dem Sensor (2) vorbei gehen und so außerhalb eines Messbereichs des Sensors (2) sind. 3. Device according to claim 1 or 2, characterized in that the light strip (4, 5) is attached opposite the plant (16) in such a way that direct reflections on the sensor (2) pass and so outside a measuring range of the sensor (2 ) are.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sensor (2) eine Kamera ist oder eine Kamera aufweist. 4. Device according to one of the preceding claims, characterized in that the sensor (2) is a camera or has a camera.
5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lichtleiste (4, 5) mehrere nebeneinander angeordnete LEDs (6 bis 15) aufweist. 5. Device according to one of the preceding claims, characterized in that the light strip (4, 5) has several LEDs (6 to 15) arranged next to one another.
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Helligkeit der LED (6 bis 15) dimmbar ist. 6. Device according to one of the preceding claims, characterized in that the brightness of the LED (6 to 15) is dimmable.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Aufnahmedauer des Sensors (2) variierbar ist. 7. Device according to one of the preceding claims, characterized in that the recording duration of the sensor (2) can be varied.
8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mehrere LEDs (6 bis 15) Vorsatzlinsen (17 bis 26) aufweisen, die das Licht auf das Sichtfeld (3) ausrichten. 8. Device according to one of the preceding claims, characterized in that several LEDs (6 to 15) have ancillary lenses (17 to 26) which direct the light onto the field of view (3).
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lichtleiste (4, 5) mit einem konstanten Strom versorgt wird. 9. Device according to one of the preceding claims, characterized in that the light strip (4, 5) is supplied with a constant current.
10. Verfahren zum Erfassen von Daten zu mindestens einer Pflanze (16) mit mindestens einem Sensor (2), der ein Abbild der Pflanze (16) aufnimmt, dadurch gekennzeichnet, dass der Sensor auf ein Sichtfeld (3) ausgerichtet wird und eine Lichtleiste (4, 5) gegenüber der Pflanze (16) so angebracht wird, dass direkte Spiegelungen an dem Sensor (2) vorbei gehen und so außerhalb eines Messbereichs des Sensors (2) sind. 10. A method for acquiring data on at least one plant (16) with at least one sensor (2) which records an image of the plant (16), characterized in that the sensor is aligned with a field of view (3) and a light bar ( 4, 5) is attached opposite the plant (16) in such a way that direct reflections go past the sensor (2) and are thus outside a measuring range of the sensor (2).
EP21712945.1A 2020-02-10 2021-02-09 Device and method for acquiring data regarding at least one plant Pending EP4102955A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020000839.9A DE102020000839B3 (en) 2020-02-10 2020-02-10 Device and method for acquiring data on at least one plant
PCT/DE2021/000022 WO2021160197A1 (en) 2020-02-10 2021-02-09 Device and method for acquiring data regarding at least one plant

Publications (1)

Publication Number Publication Date
EP4102955A1 true EP4102955A1 (en) 2022-12-21

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ID=75108094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21712945.1A Pending EP4102955A1 (en) 2020-02-10 2021-02-09 Device and method for acquiring data regarding at least one plant

Country Status (3)

Country Link
EP (1) EP4102955A1 (en)
DE (1) DE102020000839B3 (en)
WO (1) WO2021160197A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2323472B1 (en) * 2008-07-11 2013-09-11 Koninklijke Philips Electronics N.V. Illumination arrangement for illuminating horticultural growths
EP3409100A1 (en) * 2017-05-29 2018-12-05 Institut National de la Recherche Agronomique (INRA) Phenotyping apparatus
CN107655888A (en) 2017-09-09 2018-02-02 华中农业大学 One kind is applied to rice root two dimensional image harvester in root box soil
CN110031465B (en) 2019-04-19 2022-02-11 中山大学 Plant root system in-situ observation system

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WO2021160197A1 (en) 2021-08-19

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