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    Detecting plants in a field by detecting a change in slope in a reflectance characteristic
    1.
    发明专利
    Detecting plants in a field by detecting a change in slope in a reflectance characteristic 未知

    公开(公告)号：AU4901997A

    公开(公告)日：1998-05-22

    申请号：AU4901997

    申请日：1997-10-23

    Applicant: PATCHEN INC

    Inventor： KINTER MALCOLM L ,  BECK JAMES L

    IPC: G01J3/10 ,  G01J3/433 ,  G01J3/50 ,  H01J40/14

    Abstract: An agricultural implement (for example, a spray device) differentiates living plants growing in a field from background materials (such as soil) by detecting a change in slope of a reflectance characteristic of objects in a field of view. By using a change in slope of the reflectance characteristic, a small percentage of living plant material in the field of view can be detected and the agricultural implement need not be calibrated to a particular background material. In some embodiments, if the change in slope is determined to exceed a predetermined threshold amount, then it is determined that a weed likely exists in the field of view and a solenoid-operated spray valve is opened at the appropriate time to spray the entire area (including the weed) that was in the field of view with herbicide.

    Photodetector circuit for an electronic sprayer
    4.
    发明专利
    Photodetector circuit for an electronic sprayer 未知

    公开(公告)号：AU4083497A

    公开(公告)日：1998-04-02

    申请号：AU4083497

    申请日：1997-08-26

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: G01J1/44 ,  G01J3/50 ,  B05B15/04

    Abstract: An agricultural implement for spraying herbicide on weeds in a field without spraying herbicide on bare soil includes a photodetector circuit. The photodetector circuit includes a photodetector and an active filter. The photodetector is not AC coupled in parallel with an inductor/capacitor resonant circuit which tunes the active filter. As a result, changes in photodetector capacitance due to changes in ambient lighting conditions are not impressed across the resonant inductor/capacitor circuit and therefore do not adversely change the frequency and phase characteristics of the photodetector circuit.

    APPARATUS AND METHOD FOR SPRAYING HERBICIDE ON WEEDS IN A COTTON FIELD
    5.
    发明专利
    APPARATUS AND METHOD FOR SPRAYING HERBICIDE ON WEEDS IN A COTTON FIELD 未知

    公开(公告)号：CA2250889A1

    公开(公告)日：1997-10-09

    申请号：CA2250889

    申请日：1997-04-01

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: A01M7/00 ,  A01M21/00 ,  G01C3/08 ,  G01J1/04 ,  G01J1/42 ,  G01J1/44 ,  G01J3/42 ,  G01J3/50 ,  G01N21/25 ,  A01C23/00

    Abstract: Weeds (100) growing around the bases of the stalks of cotton plant (101) growing in a row (105 and 105A) in a cotton field are sprayed with herbicide without spraying the cotton stalks (101) or wasting herbicide on bare ground (107). The cotton plants are adequately mature that their stalks exhibit a significantly different spectral reflectance characteristic than the weeds typically growing amid the cotton. The cotton plants are adequately tall that the majority of the leaves of the cotton plants are disposed outside the area which can be sprayed using an electronically-controlled valve and nozzle (103). Light is transmitted toward an object (a cotton stalk, a weed, or soil) in the row and the reflected light is analyzed. If the object has a spectral characteristic of a growing weed, then the valve is activated and the object is sprayed with herbicide. If the object does not have the spectral characteristic of a growing weed, then the valve is not activated and the object is not sprayed with herbicide.

    APPARATUS AND METHOD FOR SPRAYING HERBICIDE ON WEEDS IN A COTTON FIELD
    7.
    发明公开
    APPARATUS AND METHOD FOR SPRAYING HERBICIDE ON WEEDS IN A COTTON FIELD 失效
    BAUMWOLLFELDUNKRAUTHERBIZIDSPRÜHVORRICHTUNGUND -VERFAHREN

    公开(公告)号：EP0900451A4

    公开(公告)日：1999-11-24

    申请号：EP97920078

    申请日：1997-04-01

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: A01M7/00 ,  A01M21/00 ,  G01C3/08 ,  G01J1/04 ,  G01J1/42 ,  G01J1/44 ,  G01J3/42 ,  G01J3/50 ,  G01N21/25 ,  H01J40/14

    CPC classification number: A01M21/00 ,  A01M7/0089 ,  G01C3/085 ,  G01J1/04 ,  G01J1/0407 ,  G01J1/0422 ,  G01J1/0437 ,  G01J1/44 ,  G01J3/42 ,  G01J3/50 ,  G01J3/501 ,  G01J2001/4242 ,  G01N21/255 ,  G01N2021/8466

    Abstract: Weeds (100) growing around the bases of the stalks of cotton plant (101) growing in a row (105 and 105A) in a cotton field are sprayed with herbicide without spraying the cotton stalks (101) or wasting herbicide on bare ground (107). The cotton plants are adequately mature that their stalks exhibit a significantly different spectral reflectance characteristic than the weeds typically growing amid the cotton. The cotton plants are adequately tall that the majority of the leaves of the cotton plants are disposed outside the area which can be sprayed using an electronically-controlled valve and nozzle (103). Light is transmitted toward an object (a cotton stalk, a weed, or soil) in the row and the reflected light is analyzed. If the object has a spectral characteristic of a growing weed, then the valve is activated and the object is sprayed with herbicide. If the object does not have the spectral characteristic of a growing weed, then the valve is not activated and the object is not sprayed with herbicide.

    Abstract translation: 杂草（100）的棉花植物（101）的茎的一排（105和105A）在棉田生长碱基周围生长喷洒除草剂不喷射棉杆（101）或浪费除草剂在裸露地面（107 ）。 棉花植物已经足够成熟，它们的茎具有明显不同于通常在棉花中生长的杂草的光谱反射特征。 棉花植物足够高，使得棉花植物的大部分叶子布置在可以使用电子控制阀和喷嘴（103）喷洒的区域之外。 光被传输到一行中的物体（棉花秆，杂草或土壤），并分析反射光。 如果物体具有杂草生长的光谱特征，则启动阀门，并用除草剂喷洒物体。 如果物体不具有生长杂草的光谱特性，则阀门不启动，物体不喷洒除草剂。

    APPARATUS AND METHOD FOR DETERMINING A DISTANCE TO AN OBJECTIN A FIELD
    8.
    发明专利
    APPARATUS AND METHOD FOR DETERMINING A DISTANCE TO AN OBJECTIN A FIELD 未知

    公开(公告)号：CA2193837C

    公开(公告)日：2007-07-03

    申请号：CA2193837

    申请日：1995-07-14

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: G01N21/00 ,  A01M7/00 ,  A01M21/00 ,  G01B11/00 ,  G01C3/08 ,  G01J1/04 ,  G01J1/42 ,  G01J1/44 ,  G01N21/25 ,  G01N21/84 ,  G02B6/00 ,  G05D1/02

    Abstract: An optical proximity sensor (1) generates information indicative of a distance (DI) to an object (14A) in a field and in some embod- iments also generates information indicative of a spectral reflectance characteristics of the object (14A). The information indicative of the spectral reflectance characteristic can be used to determine whether the object (14A) in the field is a living plant (14A) or another object such as soil (10). Light emitted from the optical sensor (1) for reflection off the object (14A) is modulated so that reflected light from the optical sensor can be discriminated from reflected ambient sunlight. The opti- cal sensor (1) is scanned over the field to map objects in the field and/or to determine the location of rows of crop plants. A sensor in accor- dance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.

    Apparatus and method for spraying herbicide on weeds in a cotton field
    9.
    发明专利
    Apparatus and method for spraying herbicide on weeds in a cotton field 未知

    公开(公告)号：AU721058B2

    公开(公告)日：2000-06-22

    申请号：AU2435997

    申请日：1997-04-01

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: A01M7/00 ,  A01M21/00 ,  G01C3/08 ,  G01J1/04 ,  G01J1/42 ,  G01J1/44 ,  G01J3/42 ,  G01J3/50 ,  G01N21/25 ,  H01J40/14

    Abstract: Weeds growing around the bases of the stalks of cotton plants growing in a row in a cotton field are sprayed with herbicide without spraying the cotton stalks or wasting herbicide on bare ground. The cotton plants are adequately mature that their stalks exhibit a significantly different spectral reflectance characteristic than the weeds typically growing amid the cotton. The cotton plants are adequately tall that the majority of the leaves of the cotton plants are disposed outside the area which can be sprayed using an electronically-controlled valve and nozzle. Light is transmitted toward an object (a cotton stalk, a weed, or soil) in the row and the reflected light is analyzed. If the object has a spectral characteristic of a growing weed, then the valve is activated and the object is sprayed with herbicide. If the object does not have the spectral characteristic of a growing weed (such as the spectral characteristic of a woody cotton stalk or of soil), then the valve is not activated and the object is not sprayed with herbicide.

    An agricultural implement having multiple agents for mapping fields
    10.
    发明专利
    An agricultural implement having multiple agents for mapping fields 未知

    公开(公告)号：AU6135598A

    公开(公告)日：1998-09-18

    申请号：AU6135598

    申请日：1998-02-23

    Applicant: PATCHEN INC

    Inventor： BECK JAMES L ,  KINTER MALCOLM L

    IPC: A01M7/00 ,  G06F12/06 ,  B05B9/06 ,  G06F13/00

    Abstract: An agricultural implement in accordance with the present invention includes a supporting member affixed to a farm vehicle, such as a tractor. The supporting member supports a plurality of sensors that each has a unique physical location along the supporting member such that the sensors traverse parallel paths as the vehicle moves across a field. Information gathered by the sensors can be combined with information as to the vehicle's position to create a map of the field. For example, information indicative of the presence or absence of weeds at specific locations in a field can be used to create a weed-map. To ensure that such maps accurately depict a field, the agricultural implement includes a control unit configured to automatically assign each sensor unit a unique address based upon the physical location of each sensor.

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