Stem sensor

Patent metadata

Field	Value
Publication number	US-10999977-B2
Application number	US-201716089796-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Mar 29, 2016
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A mechanized, non-disruptive plant touch, or contact, sensing system for detecting by touch, or contact, the precise location of plants and/or plant stems relative to a machine in motion, and then disengage the plant without significantly affecting the plant's health or development.

First claim

The invention claimed is:

1. A plant contact centering sensor for detecting, by physical contact, the presence of a plant stem growing in an environment with other plant stems, the sensor comprising:
two or more arms;
at least one stem receptacle formed at a junction of the two or more arms, the at least one stem receptacle comprises a leading face and a trailing face that join at a vertex of the respective stem receptacle, the at least one stem receptacle structured to physically receive a stem between the leading and trailing edges; and
at least a portion of a centering sensor position assembly that is structured and operable to sense a rotational position of the centering sensor during actuation of the centering sensor.

2. The sensor of claim 1 , wherein the at least a portion of the centering sensor position assembly is structured and operable to sense when the at least one stem receptacle is positioned in a Cradling position indicating a stem is positioned within the respective stem receptacle in a Cradled position whereby the stem is simultaneously in contact with both the leading and trailing face.

3. The sensor of claim 2 , wherein the sensor comprises a plurality of stem receptacles and is structured such that at least one of stem receptacles has a centering line extending from a center of the sensor such that an approximate center point of a stem aligns substantially with the centering line of the respective stem receptacle when the respective stem is in the Cradled position.

4. The sensor of claim 3 , wherein the sensor is star shaped having five arms and five stem receptacles formed therebetween, wherein the leading face and a trailing face of the stem receptacles join at a vertex having a vertex angle of between 90° and 120°.

5. The sensor of claim 2 , wherein the at least a portion of the centering sensor position assembly comprises at least one contact sensor disposed along the leading face and the trailing face, the at least one contact sensor structured and operable to detect when a respective stem is in contact with the respective leading face and trailing face, thereby indicating that one of the at least one stem receptacles is positioned in the cradling position and the respective stem is in the Cradled position.

6. A plant contact centering assembly for detecting, by physical contact, the presence of a plant stem growing in an environment with other plant stems, the assembly comprising:
a hub mountable to a platform;
a plant contact centering sensor operably connected to the hub, the centering sensor comprising:
two or more arms;
at least one stem receptacle formed at a junction of the two or more arms, the at least one stem receptacle comprises a leading face and a trailing face that join at a vertex of the respective stem receptacle, the at least one stem receptacle structured to physically receive a stem between the leading and trailing edges; and

a centering sensor position assembly that is structured and operable to sense a rotational position of the centering sensor during actuation of the centering sensor.

7. The assembly of claim 6 , wherein the sensor comprises a plurality of stem receptacles and is structured such that at least one of stem receptacles has a centering line extending from a center of the sensor such that an approximate center point of a stem aligns substantially with the centering line of the respective stem receptacle when the respective stem is in the Cradled position.

8. The assembly of claim 7 , wherein the sensor is star shaped having five arms and five stem receptacles formed therebetween, wherein the leading face and a trailing face of the stem receptacles join at a vertex having a vertex angle of between 90° and 120°.

9. The assembly of claim 6 , wherein the centering sensor position assembly comprises at least one sensor pin disposed within the centering sensor and at least one position sensor disposed within the hub, the at least one position sensor structured and operable to sense when the at least one sensor pin is substantially aligned therewith, thereby indicating that one of the at least one stem receptacles is positioned in a cradling position.

10. The assembly of claim 6 , wherein at least a portion of the centering sensor position assembly comprises at least one contact sensor disposed along the leading face and the trailing face, the at least one contact sensor structured and operable to detect when a respective stem is in contact with the respective leading face and trailing face, thereby indicating that one of the at least one stem receptacles is positioned in the cradling position and the respective stem is in the Cradled position.

11. A mechanized, non-disruptive plant contact sensing system for detecting, by physical contact, the presence of a plant stem growing in an environment with other plant stems, the system comprising:
a system platform; and
at least one plant contact sensing mechanism mounted to the system platform, wherein the at least one plant contact sensing mechanism comprises:
a guiderail; and
a plant contact centering assembly mounted to the guiderail, said assembly comprising:
a hub mountable to a platform;
a plant contact centering sensor operably connected to the hub, the centering sensor comprising:
two or more arms;
at least one stem receptacle formed at a junction of the two or more arms, the at least one stem receptacle comprises a leading face and a trailing face that join at a vertex of the respective stem receptacle, the at least one stem receptacle structured to physically receive a stem between the leading and trailing edges; and

a centering sensor position assembly that is structured and operable to sense a rotational position of the centering sensor during actuation of the centering sensor.

12. The system of claim 11 , wherein the sensor comprises a plurality of stem receptacles and is structured such that at least one of stem receptacles has a centering line extending from a center of the sensor such that an approximate center point of a stem aligns substantially with the centering line of the respective stem receptacle when the respective stem is in the Cradled position.

13. The system of claim 12 , wherein the sensor is star shaped having five arms and five stem receptacles formed therebetween, wherein the leading face and a trailing face of the stem receptacles join at a vertex having a vertex angle of between 90° and 120°.

14. The system of claim 11 , wherein the centering sensor position assembly comprises at least one sensor pin disposed within the centering sensor and at least one position sensor disposed within the hub, the at least one position sensor structured and operable to sense when the at least one sensor pin is substantially aligned therewith, thereby indicating a present position of the centering sensor.

15. The system of claim 11 , wherein the centering sensor position assembly comprises at least one sensor pin disposed within the centering sensor and at least one position sensor disposed within the hub, the at least one position sensor structured and operable to sense when the at least one sensor pin is substantially aligned therewith, thereby indicating that one of the at least one stem receptacles is positioned in a cradling position.

16. The system of claim 11 , wherein at least a portion of the centering sensor position assembly comprises at least one contact sensor disposed along the leading face and the trailing face, the at least one contact sensor structured and operable to detect when a respective stem is in contact with the respective leading face and trailing

Assignees

• Monsanto Technology Llc

Inventors

• Maddux Andrew
• Pritchard John E
• Taylor Joshua W

Classifications

• G01B11/08

  for measuring diameters · CPC title

• A01M7/00

  Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass · CPC title

• G01B11/02

  for measuring length, width or thickness (G01B11/08 takes precedence) · CPC title

• A01B79/005

  Precision agriculture · CPC title

• A01M17/00

  Apparatus for the destruction of vermin in soil or in foodstuffs {(injecting fertilisers into the roots of trees A01G29/00)} · CPC title