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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.
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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
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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公开(公告)号：AU3371597A
公开(公告)日：1998-01-07
申请号：AU3371597
申请日：1997-06-17
Applicant: PATCHEN INC
Inventor： KINTER MALCOLM L
Abstract: An agricultural spray implement includes a plurality of removable valve/filter/nozzle cartridges. Each removable cartridge has a housing that retains a high speed solenoid valve and a spray nozzle. When the solenoid valve is open, an agricultural liquid (for example, herbicide) flows through the solenoid valve, through a chamber in the housing, and through the nozzle. To monitor cartridge operation and/or to detect cartridge failures (for example, a solenoid valve that is stuck open or closed or a nozzle that is clogged), a pressure sensor is provided that detects a pressure in the chamber. A chamber pressure that does not change when the solenoid valve is controlled to open and/or close is indicative of cartridge failure. Operation of each of the many spray cartridges of the agricultural spray implement is monitored from a single display.
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公开(公告)号：BR9508386A
公开(公告)日：1997-11-18
申请号：BR9508386
申请日：1995-07-14
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 , G01M9/04 , G06M7/00 , H01J40/14 , A01C23/00 , A01G25/00
Abstract: An optical proximity sensor generates information indicative of a distance to an object in a field and in some embodiments also generates information indicative of a spectral reflectance characteristic of the object. The information indicative of the spectral reflectance characteristic can be used to determine whether the object in the field is a living plant or another object such as soil. Light emitted from the optical sensor for reflection off the object is modulated so that reflected light from the optical sensor can be discriminated from reflected ambient sunlight. The optical sensor 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 accordance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.
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公开(公告)号：CA2193837A1
公开(公告)日：1996-02-01
申请号：CA2193837
申请日：1995-07-14
Applicant: PATCHEN INC
Inventor： BECK JAMES L , KINTER MALCOLM L
IPC: A01M7/00 , A01M21/00 , G01C3/08 , G01J1/04 , G01J1/42 , G01J1/44 , G01N21/00 , G01B11/00 , G01N21/25 , G01N21/84 , G02B6/00 , G05D1/02
Abstract: An optical proximity sensor (1) generates information indicative of a distance (D1) to an object (14A) in a field and in some embodiments 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 optical 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 accordance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.
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Patent Agency Ranking
公开(公告)号：ES2127291T5
公开(公告)日：2002-06-16
申请号：ES93917331
申请日：1993-07-27
Applicant: PATCHEN INC
Abstract: An apparatus and a method are provided for selectively eliminating weeds in agriculture operations. To provide selective elimination, at least two light (radiation) emitters, powered by an internal power source, are modulated to switch on and off at very high speeds. Each emitter emits radiation of a different emitter wavelength. The on/off modulation of one emitter is phase shifted by approximately 90 DEG with respect to the modulation of the other emitter. The pair of emitters are focused on a particular spot on the ground. The light beams, provided by the emitters, are reflected off a plant or the soil and are intercepted by a photodetector. Because plants have a characteristic spectral reflectance in regions of the electromagnetic spectrum which can be discriminated from the spectral reflectance of the background earth, the relative amplitudes of the reflected radiation at the two emitter wavelengths varies depending on whether the radiation is reflected off a plant or the soil. A ratio of the radiation at the two emitter wavelengths received by the photodetector is converted to a phase. This phase is compared to an initial reference phase of the modulation of one of the emitters. A controller uses this phase information to determine the presence or absence of a plant and then eliminates the weed.
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公开(公告)号：ES2127291T3
公开(公告)日：1999-04-16
申请号：ES93917331
申请日：1993-07-27
Applicant: PATCHEN INC
Abstract: An apparatus and a method are provided for selectively eliminating weeds in agriculture operations. To provide selective elimination, at least two light (radiation) emitters, powered by an internal power source, are modulated to switch on and off at very high speeds. Each emitter emits radiation of a different emitter wavelength. The on/off modulation of one emitter is phase shifted by approximately 90 DEG with respect to the modulation of the other emitter. The pair of emitters are focused on a particular spot on the ground. The light beams, provided by the emitters, are reflected off a plant or the soil and are intercepted by a photodetector. Because plants have a characteristic spectral reflectance in regions of the electromagnetic spectrum which can be discriminated from the spectral reflectance of the background earth, the relative amplitudes of the reflected radiation at the two emitter wavelengths varies depending on whether the radiation is reflected off a plant or the soil. A ratio of the radiation at the two emitter wavelengths received by the photodetector is converted to a phase. This phase is compared to an initial reference phase of the modulation of one of the emitters. A controller uses this phase information to determine the presence or absence of a plant and then eliminates the weed.
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公开(公告)号：AU8252998A
公开(公告)日：1999-01-04
申请号：AU8252998
申请日：1998-06-12
Applicant: PATCHEN INC
Inventor： KINTER MALCOLM L , BECK JAMES L
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公开(公告)号：AT173819T
公开(公告)日：1998-12-15
申请号：AT93917331
申请日：1993-07-27
Applicant: PATCHEN INC
Abstract: An apparatus and a method are provided for selectively eliminating weeds in agriculture operations. To provide selective elimination, at least two light (radiation) emitters, powered by an internal power source, are modulated to switch on and off at very high speeds. Each emitter emits radiation of a different emitter wavelength. The on/off modulation of one emitter is phase shifted by approximately 90 DEG with respect to the modulation of the other emitter. The pair of emitters are focused on a particular spot on the ground. The light beams, provided by the emitters, are reflected off a plant or the soil and are intercepted by a photodetector. Because plants have a characteristic spectral reflectance in regions of the electromagnetic spectrum which can be discriminated from the spectral reflectance of the background earth, the relative amplitudes of the reflected radiation at the two emitter wavelengths varies depending on whether the radiation is reflected off a plant or the soil. A ratio of the radiation at the two emitter wavelengths received by the photodetector is converted to a phase. This phase is compared to an initial reference phase of the modulation of one of the emitters. A controller uses this phase information to determine the presence or absence of a plant and then eliminates the weed.
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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
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.
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