CA2252321A1 - Primer system for product distribution machines - Google Patents
Primer system for product distribution machines Download PDFInfo
- Publication number
- CA2252321A1 CA2252321A1 CA002252321A CA2252321A CA2252321A1 CA 2252321 A1 CA2252321 A1 CA 2252321A1 CA 002252321 A CA002252321 A CA 002252321A CA 2252321 A CA2252321 A CA 2252321A CA 2252321 A1 CA2252321 A1 CA 2252321A1
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- Canada
- Prior art keywords
- product
- rate
- dispensing
- primer
- speed
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0089—Regulating or controlling systems
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
- A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
- A01C7/102—Regulating or controlling the seed rate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
A primer system for product distribution machines, such as an agricultural air seeder, a precision planter, a sprayer, or the like includes a tank or a bin for holding the product, a distribution system for conveying and distributing the product from the tank and a driving mechanism for driving the product from the tank into the distribution system at a certain rate. The driving mechanism can run automatically or it can be selectively operated, based on commands received from a controller. The controller may receive signals from a user interface and from sensing equipment, such as a ground speed detector, a pressure sensor, a flow meter etc. In a regular mode of operation, the controller runs the driving mechanism automatically at a rate calculated based on the signals received from the above mentioned systems. Most agricultural machines have the automated operation of the driving mechanism conditioned by the ground speed of the tractor being higher than a minimum speed. In a bypass mode of operation, the driving mechanism can be selectively operated by pressing a primer button on the user interface. The primer button triggers a bypass signal, instructing the controller to run the driving mechanism at a predetermined dispensing rate, regardless of other factors, such as the detected ground speed.
Description
PRIMER SYSTEM FOR PRODUCT DISTRIBUTION MACHINES
FIELD OF INVENTION
S The present invention relates to a primer system for product distribution machines, such as an agricultural air seeder, a precision planter, a sprayer, or the like.
BACKGROUND OF THE INVENTION
Agricultural machines used for applying product over a field (referred to herein as product distribution machines), such as seeders, fertilizers, planters, sprayers, and the like, must apply the product evenly across the entire field.
In the past, the practice of averaging product requirements for an entire field was common. However, averaging product requirements resulted in over fertilizing some areas and under fertilizing others. Now, it is necessary for each area of the field to accurately receive a required amount of fertilizer. Technological advances now enable farmers to obtain higher accuracy in product application. For example, when attached to a combine, yield monitors measure the amount of grain being harvested as it is sent to the bin in the combine. The actual yield of the best and poorest areas can be observed on the monitor. In addition, Global Positioning Systems (GPS) can provide information as to the exact position of the machinery in the field. Yield monitors combined with a GPS receiver, are used to plot yield maps and identify reasons why certain areas have low or high yields, which may be related to nutrient differences. With this information, farmers can then determine whether a certain part of the field might need more fertilizer, less fertilizer or should be treated with a different farming method. Variable rate systems technology means farmers can then apply fertilizer, herbicides and seed at the rate needed for a particular soil site.
Variable rate systems were designed to allow the operators of product distribution machines to vary the application rate of the product without leaving the tractor cab. Several manufacturers of agricultural equipment offer variable rate drive mechanisms on their machines. One variable rate hydraulic drive control, disclosed in Canadian patent application No. 2,221,403, essentially consists of an electric motor that provides a rotational drive rate to a hydraulic motor, which controls the product metering mechanism. The electric motor input varies with ground speed, thus providing a consistent rate of metering. Other variable rate drive mechanisms equipment are known.
A typical agricultural spreader includes a product bin and a product distribution system. The product distribution system generally includes a series of hoses, and a manifold. Product is dispensed from the bin into the distribution system through a dispensing mechanism, e.g., a metering wheel, at a rate related to the desired application rate of the product onto the field. The dispensing mechanism is typically driven by a variable rate drive system.
All of the above prior art systems have a product dispensing rate related to the ground speed (also known in the art as forward speed) of the product distribution machine. As the product distribution machine travels across the field, a sensor detects the ground speed. The variable rate drive mechanism drives the dispensing mechanism, accordingly. As the ground speed varies, the dispensing rate varies to maintain a consistent distribution of product.
A common characteristic of many variable rate systems is that the variable rate drive metering mechanism will begin operating, only after a minimum ground speed is detected by the sensors in order to overcome detection errors. For example, a minimum speed of approximately 2 miles/hour is chosen with some known seeders. If the seeder is stationary, but the wind is blowing the grass or the straw around the sensor, the sensor does not begin dispensing seed upon detecting the speed of the grass or of the straw. If a stationary seeder is accelerated to an operating speed, it will take about 2 to 10 seconds for the minimum ground speed to be detected and the metering mechanism to be activated. By this time, the seeder could have travelled about 30 feet in the field without dispensing any seed. After the meter starts dispensing seed, the operator has to retrace his path to seed that area. The time lag between movement of the seeder and the dispensing of seed is inefficient, time consuming and can cause seeding errors in the field. Other systems, do not require the detection of a minimum ground seed in order for their metering mechanisms to start operating, but there is still a time lag for the product to reach the ground, leading to the same problems. Unused or inaccurately seeded land is wasteful of space and money. It is advantageous for farmers, especially row crop farmers, to use all available land. Accurately dispensed seeds achieves better yields.
In some circumstances, agricultural product distribution machines must be backed into a corner of a field before they can be moved forward and the seeding process begins.
This is a situation where an area may be left unseeded as there is no opportunity for the operator to retract his path.
Similar problems arise when the agricultural product distribution machine may have to slow down below the minimum speed during the product dispensing process.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved primer system for product distribution machines.
The invention relates to an apparatus for distributing agricultural product over a ground surface. The apparatus may, for example, be an air seeder, a precision planter, a sprayer, or the like. The apparatus includes a storage means for storing a quantity of product to be distributed. The apparatus also includes conveying means for conveying product from the storage means to the ground surface. The apparatus also includes control means for controlling the rate of transfer of the product from the storage means to the conveying means. The control means includes a speed sensor for detecting the ground speed of the machine. The control means also includes an automatic dispenser for automatically transferring product from the storage means to the conveying means at a rate proportional to the ground speed of the machine upon the attainment of a pre-determined minimum ground speed. The control means also includes a manually operable dispenser for transferring product from the storage means to the conveying means prior to the attainment of the minimum ground speed. In an embodiment of the invention, the manually operable dispenser includes means for controlling the rate of transfer of the product from the storage means to the conveying means. In an embodiment of the invention, the manually operable dispenser is operable from a remote location, such as from the a tractor that is pulling a trailer with the apparatus for distributing agricultural product.
FIELD OF INVENTION
S The present invention relates to a primer system for product distribution machines, such as an agricultural air seeder, a precision planter, a sprayer, or the like.
BACKGROUND OF THE INVENTION
Agricultural machines used for applying product over a field (referred to herein as product distribution machines), such as seeders, fertilizers, planters, sprayers, and the like, must apply the product evenly across the entire field.
In the past, the practice of averaging product requirements for an entire field was common. However, averaging product requirements resulted in over fertilizing some areas and under fertilizing others. Now, it is necessary for each area of the field to accurately receive a required amount of fertilizer. Technological advances now enable farmers to obtain higher accuracy in product application. For example, when attached to a combine, yield monitors measure the amount of grain being harvested as it is sent to the bin in the combine. The actual yield of the best and poorest areas can be observed on the monitor. In addition, Global Positioning Systems (GPS) can provide information as to the exact position of the machinery in the field. Yield monitors combined with a GPS receiver, are used to plot yield maps and identify reasons why certain areas have low or high yields, which may be related to nutrient differences. With this information, farmers can then determine whether a certain part of the field might need more fertilizer, less fertilizer or should be treated with a different farming method. Variable rate systems technology means farmers can then apply fertilizer, herbicides and seed at the rate needed for a particular soil site.
Variable rate systems were designed to allow the operators of product distribution machines to vary the application rate of the product without leaving the tractor cab. Several manufacturers of agricultural equipment offer variable rate drive mechanisms on their machines. One variable rate hydraulic drive control, disclosed in Canadian patent application No. 2,221,403, essentially consists of an electric motor that provides a rotational drive rate to a hydraulic motor, which controls the product metering mechanism. The electric motor input varies with ground speed, thus providing a consistent rate of metering. Other variable rate drive mechanisms equipment are known.
A typical agricultural spreader includes a product bin and a product distribution system. The product distribution system generally includes a series of hoses, and a manifold. Product is dispensed from the bin into the distribution system through a dispensing mechanism, e.g., a metering wheel, at a rate related to the desired application rate of the product onto the field. The dispensing mechanism is typically driven by a variable rate drive system.
All of the above prior art systems have a product dispensing rate related to the ground speed (also known in the art as forward speed) of the product distribution machine. As the product distribution machine travels across the field, a sensor detects the ground speed. The variable rate drive mechanism drives the dispensing mechanism, accordingly. As the ground speed varies, the dispensing rate varies to maintain a consistent distribution of product.
A common characteristic of many variable rate systems is that the variable rate drive metering mechanism will begin operating, only after a minimum ground speed is detected by the sensors in order to overcome detection errors. For example, a minimum speed of approximately 2 miles/hour is chosen with some known seeders. If the seeder is stationary, but the wind is blowing the grass or the straw around the sensor, the sensor does not begin dispensing seed upon detecting the speed of the grass or of the straw. If a stationary seeder is accelerated to an operating speed, it will take about 2 to 10 seconds for the minimum ground speed to be detected and the metering mechanism to be activated. By this time, the seeder could have travelled about 30 feet in the field without dispensing any seed. After the meter starts dispensing seed, the operator has to retrace his path to seed that area. The time lag between movement of the seeder and the dispensing of seed is inefficient, time consuming and can cause seeding errors in the field. Other systems, do not require the detection of a minimum ground seed in order for their metering mechanisms to start operating, but there is still a time lag for the product to reach the ground, leading to the same problems. Unused or inaccurately seeded land is wasteful of space and money. It is advantageous for farmers, especially row crop farmers, to use all available land. Accurately dispensed seeds achieves better yields.
In some circumstances, agricultural product distribution machines must be backed into a corner of a field before they can be moved forward and the seeding process begins.
This is a situation where an area may be left unseeded as there is no opportunity for the operator to retract his path.
Similar problems arise when the agricultural product distribution machine may have to slow down below the minimum speed during the product dispensing process.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved primer system for product distribution machines.
The invention relates to an apparatus for distributing agricultural product over a ground surface. The apparatus may, for example, be an air seeder, a precision planter, a sprayer, or the like. The apparatus includes a storage means for storing a quantity of product to be distributed. The apparatus also includes conveying means for conveying product from the storage means to the ground surface. The apparatus also includes control means for controlling the rate of transfer of the product from the storage means to the conveying means. The control means includes a speed sensor for detecting the ground speed of the machine. The control means also includes an automatic dispenser for automatically transferring product from the storage means to the conveying means at a rate proportional to the ground speed of the machine upon the attainment of a pre-determined minimum ground speed. The control means also includes a manually operable dispenser for transferring product from the storage means to the conveying means prior to the attainment of the minimum ground speed. In an embodiment of the invention, the manually operable dispenser includes means for controlling the rate of transfer of the product from the storage means to the conveying means. In an embodiment of the invention, the manually operable dispenser is operable from a remote location, such as from the a tractor that is pulling a trailer with the apparatus for distributing agricultural product.
According to the invention there is provided an apparatus for distributing agricultural product over a ground surface, the apparatus comprising: storage means for storing a quantity of product to be distributed; conveying means for conveying product from the storage means to the ground surface; and control means for controlling the rate of transfer of the product from the storage means to the conveying means, the control means comprising: a speed sensor for detecting the ground speed of the machine; an automatic dispenser for automatically transferring product from the storage means to the conveying means at a rate proportional to the ground speed of the machine upon the attainment of a pre-determined minimum ground speed; and a manually operable dispenser for transferring product from the storage means to the conveying means prior to the attainment of the minimum ground speed.
In one aspect of the invention there is provided an apparatus that allows both the automatic and selective operation of a variable rate system of an agricultural product distribution machine, from a remote location such as the cab of the tractor, regardless of the detected ground speed.
In a further aspect of the invention, a primer system for product distribution machines, such as an agricultural air seeder, a precision planter, a sprayer, or the like included includes a tank or a bin for holding the product, a distribution system for conveying and distributing the product from the tank and a driving mechanism for driving the product from the tank into the distribution system at a certain rate. The driving mechanism can run automatically or it can be selectively operated, based on commands received from a controller. The controller may receive signals from a user interface and from sensing equipment, such as a ground speed detector, a pressure sensor, a flow meter etc. In a regular mode of operation, the controller runs the driving mechanism automatically at a rate calculated based on the signals received from the above mentioned systems. Most agricultural machines have the automated operation of the driving mechanism conditioned by the ground speed of the tractor being higher than a minimum speed. In a bypass mode of operation, the driving mechanism can be selectively operated by pressing a primer button on the user interface. The primer button triggers a bypass signal, instructing the controller to run the driving mechanism at a predetermined dispensing rate, of the detected ground speed.
In one aspect of the invention there is provided an apparatus that allows both the automatic and selective operation of a variable rate system of an agricultural product distribution machine, from a remote location such as the cab of the tractor, regardless of the detected ground speed.
In a further aspect of the invention, a primer system for product distribution machines, such as an agricultural air seeder, a precision planter, a sprayer, or the like included includes a tank or a bin for holding the product, a distribution system for conveying and distributing the product from the tank and a driving mechanism for driving the product from the tank into the distribution system at a certain rate. The driving mechanism can run automatically or it can be selectively operated, based on commands received from a controller. The controller may receive signals from a user interface and from sensing equipment, such as a ground speed detector, a pressure sensor, a flow meter etc. In a regular mode of operation, the controller runs the driving mechanism automatically at a rate calculated based on the signals received from the above mentioned systems. Most agricultural machines have the automated operation of the driving mechanism conditioned by the ground speed of the tractor being higher than a minimum speed. In a bypass mode of operation, the driving mechanism can be selectively operated by pressing a primer button on the user interface. The primer button triggers a bypass signal, instructing the controller to run the driving mechanism at a predetermined dispensing rate, of the detected ground speed.
Other advantages, objects and features of the present invention will be readily apparent to those skilled in the art from a review of the following detailed description of preferred embodiments in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram of a primer system.
Figure 2 is a block diagram of a primer system in accordance with the present invention.
Figure 3 represents a basic air delivery system Figure 4 represents the metering mechanism of the air delivery system in Figure 3.
Figure 5 is a block diagram of a primer system in accordance with one embodiment of the present invention, as it applies to seeders and planters.
Figure 6 is a flow chart showing the controller function, as it applies to seeders and planters, in one embodiment of the invention.
Figure 7 represents a basic sprayer system.
Figure 8 is a block diagram of a primer system in accordance with the present invention, as it applies to sprayers.
Figure 9 is a flow chart showing the controller function, as it applies to sprayers, in one embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the Figure 1, a primer system for a product distribution machine includes at least one tank 15 for holding product and a distribution system 25. Product is passed from the tank 15 into the distribution system 25 by a driving mechanism 20, at a rate related to the desired rate of product distribution of the product distribution machine 10. The product distribution machine 10 includes a controller 30, which enables driving mechanism 20 to run automatically or to be selectively operated by an operator.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram of a primer system.
Figure 2 is a block diagram of a primer system in accordance with the present invention.
Figure 3 represents a basic air delivery system Figure 4 represents the metering mechanism of the air delivery system in Figure 3.
Figure 5 is a block diagram of a primer system in accordance with one embodiment of the present invention, as it applies to seeders and planters.
Figure 6 is a flow chart showing the controller function, as it applies to seeders and planters, in one embodiment of the invention.
Figure 7 represents a basic sprayer system.
Figure 8 is a block diagram of a primer system in accordance with the present invention, as it applies to sprayers.
Figure 9 is a flow chart showing the controller function, as it applies to sprayers, in one embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the Figure 1, a primer system for a product distribution machine includes at least one tank 15 for holding product and a distribution system 25. Product is passed from the tank 15 into the distribution system 25 by a driving mechanism 20, at a rate related to the desired rate of product distribution of the product distribution machine 10. The product distribution machine 10 includes a controller 30, which enables driving mechanism 20 to run automatically or to be selectively operated by an operator.
The illustrated product distribution machine 10 is an agricultural spreader, towed by a vehicle (not shown) in a field onto which product has to be applied. The controller 30 receives command signals from a ground speed sensor 40 and from a user interface 50.
The ground speed sensor 40 detects the ground speed or forward speed of the system for product distribution machine 10, as the vehicle tows the product distribution machine 10, in the field.
The user interface 50 allows the operator to monitor and set various parameters relating to the process, such as application rate, product size, moisture content, density, location in the field implement widths, calibration numbers, and the like. The process parameters can be changed through operator settings buttons 55.
A primer unit 60 comprising one or more buttons, on the user interface 50, allows the operator to selectively operate the driving mechanism 20, as it will be further described.
1 S The buttons on the user interface 50 may, alternatively, be any input means, such as keys on a keypad, switches, lever, and the like. The user interface 50 is positioned in such way that an operator can control the system 'on-the-go', i.e. while the distribution system travels in the field. In a preferred embodiment, the user interface 50 comprises a screen and a console unit, situated in the cab of the vehicle towing the product distribution machine 10.
In the block diagram of Figure 2, the ground speed and the data from the user interface are collectively referred to as rate data input 65. The rate data input 65 is processed by the controller 30. Upon processing, the controller 30 activates the driving mechanism 20 which, as a result, drives product from the tank 15 into the distribution system 25 at a controlled rate output 70.
The driving mechanism 20 has at least two modes of operation, that are designated herein as the regular mode of operation and the bypass mode of operation.
During the regular mode of operation, the driving mechanism runs automatically at a dispensing rate calculated based on the detected ground speed and on the operator settings. Therefore the controlled rate output 70 varies with the rate data input 65 to compensate for ground speed fluctuations and produce a consistent application of the product onto the field.
Generally, the driving system 20 functions in its regular mode of operation only when the detected ground speed is above a minimum speed. The value of the minimum ground speed is selected based on various considerations. The value of the minimum speed can vary from 0 miles/hour up.
If desired, the operator can bypass the regular mode of operation of the driving mechanism 20 by activating the driving mechanism 20 to dispense product at a predetermined controlled rate output 70. This is the bypass mode of operation.
The selection of the bypass mode of operation by the operator is done through the primer unit 60. By pressing a button on the primer unit 60, the operator initiates a program that bypasses the input from the ground sensor 40 to the driving mechanism 20. In other words, by pressing a primer button on the user interface 50, a bypass signal is sent to the controller 30, which is programmed to start the driving mechanism 20 at a predetermined rate or at a computed rate.
Since the regular mode of operation of the driving mechanism 20 depends on the detection of a minimum ground speed, one usually engages the driving mechanism in the bypass mode by using the primer unit 60, when the ground speed is below the minimum speed. Among the situations when this condition occurs are: at the beginning of the application process when the vehicle is stationary, when the vehicle is stopped midfield, when the vehicle is backed into corners, when crossing waterways.
In a preferred embodiment, the operator may select from a plurality of predetermined rates at which the controller 30 can run the driving system Z0, various rates being suited for various situations. Each rate may have a corresponding primer button on the primer unit 60 in the cab of the vehicle.
The invention will be described next in the context of three preferred embodiments: air seeding systems, precision planters and sprayers. The person skilled in the art will recognize that the present invention may be embodied in other types of agriculture machines.
The ground speed sensor 40 detects the ground speed or forward speed of the system for product distribution machine 10, as the vehicle tows the product distribution machine 10, in the field.
The user interface 50 allows the operator to monitor and set various parameters relating to the process, such as application rate, product size, moisture content, density, location in the field implement widths, calibration numbers, and the like. The process parameters can be changed through operator settings buttons 55.
A primer unit 60 comprising one or more buttons, on the user interface 50, allows the operator to selectively operate the driving mechanism 20, as it will be further described.
1 S The buttons on the user interface 50 may, alternatively, be any input means, such as keys on a keypad, switches, lever, and the like. The user interface 50 is positioned in such way that an operator can control the system 'on-the-go', i.e. while the distribution system travels in the field. In a preferred embodiment, the user interface 50 comprises a screen and a console unit, situated in the cab of the vehicle towing the product distribution machine 10.
In the block diagram of Figure 2, the ground speed and the data from the user interface are collectively referred to as rate data input 65. The rate data input 65 is processed by the controller 30. Upon processing, the controller 30 activates the driving mechanism 20 which, as a result, drives product from the tank 15 into the distribution system 25 at a controlled rate output 70.
The driving mechanism 20 has at least two modes of operation, that are designated herein as the regular mode of operation and the bypass mode of operation.
During the regular mode of operation, the driving mechanism runs automatically at a dispensing rate calculated based on the detected ground speed and on the operator settings. Therefore the controlled rate output 70 varies with the rate data input 65 to compensate for ground speed fluctuations and produce a consistent application of the product onto the field.
Generally, the driving system 20 functions in its regular mode of operation only when the detected ground speed is above a minimum speed. The value of the minimum ground speed is selected based on various considerations. The value of the minimum speed can vary from 0 miles/hour up.
If desired, the operator can bypass the regular mode of operation of the driving mechanism 20 by activating the driving mechanism 20 to dispense product at a predetermined controlled rate output 70. This is the bypass mode of operation.
The selection of the bypass mode of operation by the operator is done through the primer unit 60. By pressing a button on the primer unit 60, the operator initiates a program that bypasses the input from the ground sensor 40 to the driving mechanism 20. In other words, by pressing a primer button on the user interface 50, a bypass signal is sent to the controller 30, which is programmed to start the driving mechanism 20 at a predetermined rate or at a computed rate.
Since the regular mode of operation of the driving mechanism 20 depends on the detection of a minimum ground speed, one usually engages the driving mechanism in the bypass mode by using the primer unit 60, when the ground speed is below the minimum speed. Among the situations when this condition occurs are: at the beginning of the application process when the vehicle is stationary, when the vehicle is stopped midfield, when the vehicle is backed into corners, when crossing waterways.
In a preferred embodiment, the operator may select from a plurality of predetermined rates at which the controller 30 can run the driving system Z0, various rates being suited for various situations. Each rate may have a corresponding primer button on the primer unit 60 in the cab of the vehicle.
The invention will be described next in the context of three preferred embodiments: air seeding systems, precision planters and sprayers. The person skilled in the art will recognize that the present invention may be embodied in other types of agriculture machines.
Air seeders As depicted in Figures 3 and 4, a basic air delivery system consists of an air cart 10, an air distribution system 25 and a seeding tool 27. The seeding tool 27 may be a series of ground openers. The air distribution system 25 comprises a series of hoses or a manifold. The air cart 10 can be attached to a vehicle, such as a tractor, or it can be built as an integral part of a vehicle. The air cart 10 includes one or more tanks 15 to hold products like seed and fertilizer, a metering system 20 to deliver the appropriate amount of product into the distribution system 25 and a hydraulic fan (not shown) that supplies air to the system.
The metering system 20 controls the dispensing rate of product from the tanks into the distribution system 25. In turn, the dispensing rate of the metering system determines the application rate of product on the field.
Referring now to Figure 4, the metering system 20 includes a metering wheel, specifically designed to dispense a predetermined amount of product in specific time intervals. As product falls through the metering system 20, it is carned by airflow through the manifold 25 to the headers (not shown), where the product is split into several runs and falls down through the ground opener and into the furrow created by the opener.
The metering system 20 is driven automatically by a variable rate (VR) drive mechanism. In the case of a metering wheel, the VR mechanism will rotate this wheel at various rates. Many designs of variable rate drive mechanisms are known in the art and any of them could be used in conjunction with the present invention.
The seed cart 10 comprises sensing equipment, including means for detection of the ground speed of the cart. The ground speed sensor or detector 40 allows one to take into account variations in the ground speed of the implement when calculating the application rate, such that seeds can be dispensed consistently.
With respect to this embodiment, the primer unit 60 primes the air distribution system 25 of an air seeder, engaging the VR to rotate the metering wheel 20 at a predetermined rate.
The metering system 20 controls the dispensing rate of product from the tanks into the distribution system 25. In turn, the dispensing rate of the metering system determines the application rate of product on the field.
Referring now to Figure 4, the metering system 20 includes a metering wheel, specifically designed to dispense a predetermined amount of product in specific time intervals. As product falls through the metering system 20, it is carned by airflow through the manifold 25 to the headers (not shown), where the product is split into several runs and falls down through the ground opener and into the furrow created by the opener.
The metering system 20 is driven automatically by a variable rate (VR) drive mechanism. In the case of a metering wheel, the VR mechanism will rotate this wheel at various rates. Many designs of variable rate drive mechanisms are known in the art and any of them could be used in conjunction with the present invention.
The seed cart 10 comprises sensing equipment, including means for detection of the ground speed of the cart. The ground speed sensor or detector 40 allows one to take into account variations in the ground speed of the implement when calculating the application rate, such that seeds can be dispensed consistently.
With respect to this embodiment, the primer unit 60 primes the air distribution system 25 of an air seeder, engaging the VR to rotate the metering wheel 20 at a predetermined rate.
Figure 5 is a block diagram of a system in accordance with the present invention as it applies to seeders and planters. The controller 30 receives signal from the ground speed detector 40 and the user interface 60. A feedback loop returns to the controller 30 the rotation rate of the metering wheel 20 at any moment. Based on this information, the controller 30 commands the metering wheel 20 to rotate at the necessary rate.
As previously indicated, the user interface 50 comprises operator setting buttons 55 and priming buttons 60.
Figure 6 is flow chart showing the controller function as it applies to air seeders and planters, in one embodiment of the invention. At step 31, the controller determines whether the ground speed is greater than zero i.e. whether the cart is non-stationary. If the ground speed is greater than zero, the driving mechanism 20 operates in its regular mode of operation 33, thus having a controlled rate 70 based on the detected ground speed. If the ground speed is zero, i.e. the cart is stationary, the controller 30 allows the driving mechanism to operate in the bypass mode if the bypass mode is selected by an operator, by pressing the prime button 35. After engaging the driving mechanism in the bypass mode, the operator waits for a predetermined length of time 37 during which the product is metered from the tank at a predetermined rate, into the air stream and carried through the distribution lines to the ground openers. After the predetermined length of time elapses, the tractor can begin travelling in the field and product is ready to be seeded.
Optimally, the predetermined length of time that the operator has to wait and the predetermined rate at which the driving mechanism runs in the bypass mode are related to each other. These quantities can be determined based on experience or can be calculated by taking into account factors such as: the amount of product necessary to fill the distribution lines, an average distance that the cart has to travel in order to reach the minimum ground speed, the time for the metering mechanism to start operating in its regular mode.
According to the embodiment presented in Figure 6, the driving mechanism 20 operates in the bypass mode only when the ground speed is below the minimum speed.
The driving mechanism 20 enters the regular mode 33 once the minimum ground speed is detected. However, it has to be understood that in other embodiments, the bypass mode can be selected any time by the operator, regardless of the ground speed.
In one embodiment of the invention, the priming feature on an air cart works as follows: An AIR CART and MODE keys are pressed at the same time on the user interface. A 10 second prime begins with the meters being turned at about 15 rotations/minute (rpm) provided that a meter switch is on and a master switch is on and hydraulic pressure is applied. The 10 second prime can be interrupted if ground speed is sensed or the master switch is turned off.
Planters Like the air seeders, planters have several tanks for holding seed or fertilizer, and an air distribution system comprising a series of hoses. Product travels through the hoses, entering through a series of inlets into several chambers for storing the product.
Each chamber has joined to it a fingered singulator disk. Each chamber is located just above a corresponding ground opener. The singulator disk rotates such that as each finger passes the place where product puddles into the chamber, a single seed/fertilizer falls into the finger. The disk continues to rotate such that each subsequent finger can pick up product. The filled forgers pass a brush that eliminates the chance of multiple seeds being in a single finger. The filled fingers pass another opening in the disk when the product is dropped onto an elevator opening that carries the product to the ground opener.
The driving mechanism 20 of the planters can operate in a regular mode and a bypass mode, as previously discussed. Figures 5 and 6 apply to planters as well as seeders.
In the regular mode, the driving mechanism 20 of the planter is activated into rotating the singulator disk at a controlled rate output 70. In this mode, the controlled rate output 70 is a function of the operator settings and of the detected ground speed.
With respect to seeders, in the embodiment depicted in Figures 5 and 6, the operation in the regular mode is conditioned by the planter achieving a minimum ground speed.
In the bypass mode of operation, the operator can prime the singulator disk to rotate at a predetermined rate, regardless of the detected ground speed. The singulator disk is activated through a primer button on the user interface, in the cab of the vehicle towing the planter. On pushing the primer button, a bypass signal is sent to the controller to start rotating the disk at the predetermined rate. After engaging the bypass mode, the operator waits for a predetermined length of time during which product is singulated into the fingered disk and dropped into the elevator.
The bypass mode can be selected by the operator in any circumstance. A
situation in which the use of the bypass mode is desirable is at the beginning of the planting process. In this case, while stationary, the operator engages the primer mechanism by pressing the primer button, then waits for a predetermined length of time during which the primer mechanism runs and product is being singulated into the fingered disk at a predetermined rate, and dropped into the elevator. When the planter begins travelling in the field, seed is ready to be planted through the ground openers.
In one embodiment of the invention, the priming feature on a planter works as follows: a PRIME switch is held on the switch box. The meters are turned at 15 rotations/minute (rpm) as long as the PRIME switch is held.
Sprayers Referring now to Figure 7, a sprayer is depicted. A sprayer has at least one storage tank 15 for chemicals. In an embodiment of the invention, the tanks 15 contain a pre-mixed chemical ready for distribution. In an alternative embodiment, the tanks 15 store only water and, as the water travels through the distribution lines 25, the water is injected with the correct amount of chemical.
The required gallons/acre ratio is known and programmed into a controller 30, connected to a user interface 50 in the cab of the tractor towing the sprayer.
The gallons/acre ratio is dependent upon the type of crop, the type of chemical, the position in the field, and the like. A pump 22 pushes the product into the distribution lines 25.
As product is pushed into the distribution lines 25, it travels down at the flow rate necessary to dispense the required gallons/acre out of the nozzle on the spray bar.
During this process, the entire system remains pressurized at the appropriate level. The flow rate is dependent upon the ground speed of the sprayer.
The pump can be a centrifugal pump, in which fluid is fed into the center of a rotating pump impeller and is flung out to the impeller rim with considerable "centrifugal S force" or pressure. The pressure is determined by the speed the pump impeller is turning, which is directly connected to a hydraulic motor shaft.
During a regular mode of operation, an autorate system ensures that the correct gallons/acre ratio is dispensed from nozzles, regardless of variations in the ground speed of the sprayer. Various autorate systems are available in the art, that are suitable for use with the present invention. In general, the autorate systems adjust the flow rate in the distribution lines 25, by adjusting the pressure level in the system. As depicted in Figure 8, the actual flow rate is computed by the controller 30 based on signals from the ground speed sensor 40, the user interface 50, a flow meter 42 and a pressure sensor 44. The flow meter 42 and the pressure sensor 44 are connected in a feedback loop with the controller 30, informing the controller of the flow rate and of the pressure in the distribution lines, respectively, at any given moment.
As in the case of seeders, a minimum ground speed is required, in order for the autorate system to work. Furthermore, the autorate system works only within a range of travel speeds which is limited by the nozzles. In an embodiment of the invention, when the speed falls out of this range, an alarm will sound to inform the operator.
In desired circumstances, the system can operate in a bypass mode. In this mode a primer mechanism is selectively operated, and a predetermined flow rate, independent on the ground speed, is selected through the primer unit 60 on the user interface 50.
In the bypass mode, the primer feature pressurizes the distribution lines 25 of the sprayer at a predetermined pressure level, related to the predetermined flow rate that is selected. The predetermined pressure level is achieved by controlling a valve 80 in the distribution lines. The pressurized system starts the pump 22 and product travels at the desired flow rate. In an embodiment of the invention, the prime feature is engaged by holding a button on the primer unit 60, and is disengaged when the button is released. In an alternative embodiment, the operator could only activate the primer feature by pushing a button on the primer unit 60, and the mechanism would run by itself, controlled by a controller unit, for a predetermined length of time. In one embodiment of the invention, the priming feature on a sprayer works as follows: The operator can enter a prime set point in psi or kPascals. When a PRIME switch is held, the pressure is controlled to the operator set point. When the PRIME switch is released, control goes back to the normal controller.
Figure 9 presents the controller function in accordance with an embodiment of the invention, as it pertains to sprayers. The following features, as they relate to the invention and to Figure 9, are defined: Booms On or Off: The priming feature only works on boom sections of the sprayer, that have a corresponding switch turned on.
Boom sections can be turned on or off at the operator's choice.
Flow Calibration Mode: This mode is entered by the operator, through the user interface.
Cameras Installed: Cameras that detect plant material are installed on the spraying bar of the sprayer. Upon detecting plants to be sprayed, they send signals to a controller, to release spray onto the detected plants.
Controlled Pressure Setpoint: The priming feature in this case controls the pressure in the system. The pressure setpoint indicates the pressure to which the controller will adjust the system. This value is entered at the user interface.
Controlled Rate Setpoint: In the regular operating mode, the sprayer applies a product at a given rate. The rate set point is the operator entered rate to which the controller will control the system.
Relating to Figure 9, the sprayer has two controllers: a rate controller and a pressure controller. Depending on the mode chosen, the detecting equipment (cameras), and switch settings (prime feature on or off), the sprayer will either control the system at a set pressure or set rate.
Numerous modifications, variations and adaptations may be made to the particular embodiments of the invention described above without departing from the scope of the invention, which is defined in the claims.
As previously indicated, the user interface 50 comprises operator setting buttons 55 and priming buttons 60.
Figure 6 is flow chart showing the controller function as it applies to air seeders and planters, in one embodiment of the invention. At step 31, the controller determines whether the ground speed is greater than zero i.e. whether the cart is non-stationary. If the ground speed is greater than zero, the driving mechanism 20 operates in its regular mode of operation 33, thus having a controlled rate 70 based on the detected ground speed. If the ground speed is zero, i.e. the cart is stationary, the controller 30 allows the driving mechanism to operate in the bypass mode if the bypass mode is selected by an operator, by pressing the prime button 35. After engaging the driving mechanism in the bypass mode, the operator waits for a predetermined length of time 37 during which the product is metered from the tank at a predetermined rate, into the air stream and carried through the distribution lines to the ground openers. After the predetermined length of time elapses, the tractor can begin travelling in the field and product is ready to be seeded.
Optimally, the predetermined length of time that the operator has to wait and the predetermined rate at which the driving mechanism runs in the bypass mode are related to each other. These quantities can be determined based on experience or can be calculated by taking into account factors such as: the amount of product necessary to fill the distribution lines, an average distance that the cart has to travel in order to reach the minimum ground speed, the time for the metering mechanism to start operating in its regular mode.
According to the embodiment presented in Figure 6, the driving mechanism 20 operates in the bypass mode only when the ground speed is below the minimum speed.
The driving mechanism 20 enters the regular mode 33 once the minimum ground speed is detected. However, it has to be understood that in other embodiments, the bypass mode can be selected any time by the operator, regardless of the ground speed.
In one embodiment of the invention, the priming feature on an air cart works as follows: An AIR CART and MODE keys are pressed at the same time on the user interface. A 10 second prime begins with the meters being turned at about 15 rotations/minute (rpm) provided that a meter switch is on and a master switch is on and hydraulic pressure is applied. The 10 second prime can be interrupted if ground speed is sensed or the master switch is turned off.
Planters Like the air seeders, planters have several tanks for holding seed or fertilizer, and an air distribution system comprising a series of hoses. Product travels through the hoses, entering through a series of inlets into several chambers for storing the product.
Each chamber has joined to it a fingered singulator disk. Each chamber is located just above a corresponding ground opener. The singulator disk rotates such that as each finger passes the place where product puddles into the chamber, a single seed/fertilizer falls into the finger. The disk continues to rotate such that each subsequent finger can pick up product. The filled forgers pass a brush that eliminates the chance of multiple seeds being in a single finger. The filled fingers pass another opening in the disk when the product is dropped onto an elevator opening that carries the product to the ground opener.
The driving mechanism 20 of the planters can operate in a regular mode and a bypass mode, as previously discussed. Figures 5 and 6 apply to planters as well as seeders.
In the regular mode, the driving mechanism 20 of the planter is activated into rotating the singulator disk at a controlled rate output 70. In this mode, the controlled rate output 70 is a function of the operator settings and of the detected ground speed.
With respect to seeders, in the embodiment depicted in Figures 5 and 6, the operation in the regular mode is conditioned by the planter achieving a minimum ground speed.
In the bypass mode of operation, the operator can prime the singulator disk to rotate at a predetermined rate, regardless of the detected ground speed. The singulator disk is activated through a primer button on the user interface, in the cab of the vehicle towing the planter. On pushing the primer button, a bypass signal is sent to the controller to start rotating the disk at the predetermined rate. After engaging the bypass mode, the operator waits for a predetermined length of time during which product is singulated into the fingered disk and dropped into the elevator.
The bypass mode can be selected by the operator in any circumstance. A
situation in which the use of the bypass mode is desirable is at the beginning of the planting process. In this case, while stationary, the operator engages the primer mechanism by pressing the primer button, then waits for a predetermined length of time during which the primer mechanism runs and product is being singulated into the fingered disk at a predetermined rate, and dropped into the elevator. When the planter begins travelling in the field, seed is ready to be planted through the ground openers.
In one embodiment of the invention, the priming feature on a planter works as follows: a PRIME switch is held on the switch box. The meters are turned at 15 rotations/minute (rpm) as long as the PRIME switch is held.
Sprayers Referring now to Figure 7, a sprayer is depicted. A sprayer has at least one storage tank 15 for chemicals. In an embodiment of the invention, the tanks 15 contain a pre-mixed chemical ready for distribution. In an alternative embodiment, the tanks 15 store only water and, as the water travels through the distribution lines 25, the water is injected with the correct amount of chemical.
The required gallons/acre ratio is known and programmed into a controller 30, connected to a user interface 50 in the cab of the tractor towing the sprayer.
The gallons/acre ratio is dependent upon the type of crop, the type of chemical, the position in the field, and the like. A pump 22 pushes the product into the distribution lines 25.
As product is pushed into the distribution lines 25, it travels down at the flow rate necessary to dispense the required gallons/acre out of the nozzle on the spray bar.
During this process, the entire system remains pressurized at the appropriate level. The flow rate is dependent upon the ground speed of the sprayer.
The pump can be a centrifugal pump, in which fluid is fed into the center of a rotating pump impeller and is flung out to the impeller rim with considerable "centrifugal S force" or pressure. The pressure is determined by the speed the pump impeller is turning, which is directly connected to a hydraulic motor shaft.
During a regular mode of operation, an autorate system ensures that the correct gallons/acre ratio is dispensed from nozzles, regardless of variations in the ground speed of the sprayer. Various autorate systems are available in the art, that are suitable for use with the present invention. In general, the autorate systems adjust the flow rate in the distribution lines 25, by adjusting the pressure level in the system. As depicted in Figure 8, the actual flow rate is computed by the controller 30 based on signals from the ground speed sensor 40, the user interface 50, a flow meter 42 and a pressure sensor 44. The flow meter 42 and the pressure sensor 44 are connected in a feedback loop with the controller 30, informing the controller of the flow rate and of the pressure in the distribution lines, respectively, at any given moment.
As in the case of seeders, a minimum ground speed is required, in order for the autorate system to work. Furthermore, the autorate system works only within a range of travel speeds which is limited by the nozzles. In an embodiment of the invention, when the speed falls out of this range, an alarm will sound to inform the operator.
In desired circumstances, the system can operate in a bypass mode. In this mode a primer mechanism is selectively operated, and a predetermined flow rate, independent on the ground speed, is selected through the primer unit 60 on the user interface 50.
In the bypass mode, the primer feature pressurizes the distribution lines 25 of the sprayer at a predetermined pressure level, related to the predetermined flow rate that is selected. The predetermined pressure level is achieved by controlling a valve 80 in the distribution lines. The pressurized system starts the pump 22 and product travels at the desired flow rate. In an embodiment of the invention, the prime feature is engaged by holding a button on the primer unit 60, and is disengaged when the button is released. In an alternative embodiment, the operator could only activate the primer feature by pushing a button on the primer unit 60, and the mechanism would run by itself, controlled by a controller unit, for a predetermined length of time. In one embodiment of the invention, the priming feature on a sprayer works as follows: The operator can enter a prime set point in psi or kPascals. When a PRIME switch is held, the pressure is controlled to the operator set point. When the PRIME switch is released, control goes back to the normal controller.
Figure 9 presents the controller function in accordance with an embodiment of the invention, as it pertains to sprayers. The following features, as they relate to the invention and to Figure 9, are defined: Booms On or Off: The priming feature only works on boom sections of the sprayer, that have a corresponding switch turned on.
Boom sections can be turned on or off at the operator's choice.
Flow Calibration Mode: This mode is entered by the operator, through the user interface.
Cameras Installed: Cameras that detect plant material are installed on the spraying bar of the sprayer. Upon detecting plants to be sprayed, they send signals to a controller, to release spray onto the detected plants.
Controlled Pressure Setpoint: The priming feature in this case controls the pressure in the system. The pressure setpoint indicates the pressure to which the controller will adjust the system. This value is entered at the user interface.
Controlled Rate Setpoint: In the regular operating mode, the sprayer applies a product at a given rate. The rate set point is the operator entered rate to which the controller will control the system.
Relating to Figure 9, the sprayer has two controllers: a rate controller and a pressure controller. Depending on the mode chosen, the detecting equipment (cameras), and switch settings (prime feature on or off), the sprayer will either control the system at a set pressure or set rate.
Numerous modifications, variations and adaptations may be made to the particular embodiments of the invention described above without departing from the scope of the invention, which is defined in the claims.
Claims (5)
1. An apparatus for distributing agricultural product over a ground surface, the apparatus comprising:
storage means for storing a quantity of product to be distributed;
conveying means for conveying product from the storage means to the ground surface; and control means for controlling the rate of transfer of the product from the storage means to the conveying means, the control means comprising:
a speed sensor for detecting the ground speed of the machine;
an automatic dispenser for automatically transferring product from the storage means to the conveying means at a rate proportional to the ground speed of the machine upon the attainment of a pre-determined minimum ground speed; and a manually operable dispenser for transferring product from the storage means to the conveying means prior to the attainment of the minimum ground speed.
storage means for storing a quantity of product to be distributed;
conveying means for conveying product from the storage means to the ground surface; and control means for controlling the rate of transfer of the product from the storage means to the conveying means, the control means comprising:
a speed sensor for detecting the ground speed of the machine;
an automatic dispenser for automatically transferring product from the storage means to the conveying means at a rate proportional to the ground speed of the machine upon the attainment of a pre-determined minimum ground speed; and a manually operable dispenser for transferring product from the storage means to the conveying means prior to the attainment of the minimum ground speed.
2. An apparatus as defined in claim 1, wherein the manually operable dispenser comprises means for controlling the rate of transfer of the product from the storage means to the conveying means.
3. A machine for distributing product comprising:
a vehicle;
means for storing the product to be distributed, the storing means being mounted on the vehicle;
manually operable control means for first dispensing means for automatically dispensing product from the storage means;
second dispensing means selectively operable in response to the operator of the vehicle activating the control means for dispensing the product from the storage means;
means for conveying the product from the storage means via the first dispensing means or the second dispensing means and for distributing the product.
a vehicle;
means for storing the product to be distributed, the storing means being mounted on the vehicle;
manually operable control means for first dispensing means for automatically dispensing product from the storage means;
second dispensing means selectively operable in response to the operator of the vehicle activating the control means for dispensing the product from the storage means;
means for conveying the product from the storage means via the first dispensing means or the second dispensing means and for distributing the product.
4. A metering assembly for agricultural implements, the metering assembly comprising:
a metering device for dispensing product from the agricultural implement at a determined rate;
a variable rate drive mechanism for driving the metering device;
control means operatively coupled to the variable drive mechanism, for generating a control signal to control the dispensing rate of the metering device, the control means comprising:
speed indicator means for indicating the forward speed of the implement relative to the ground;
means for allowing the operator to set parameter values determining the dispensing rate;
means for determining the dispensing rate, based on the indicated forward speed and the operator settings;
a primer mechanism for sending a bypass signal to start the variable rate drive mechanism at a predetermined dispensing rate.
implements, the metering assembly comprising:
a metering device for dispensing product from the agricultural implement at a determined rate;
a variable rate drive mechanism for driving the metering device;
control means operatively coupled to the variable drive mechanism, for generating a control signal to control the dispensing rate of the metering device, the control means comprising:
speed indicator means for indicating the forward speed of the implement relative to the ground;
means for allowing the operator to set parameter values determining the dispensing rate, from the tractor cab, during travelling;
means for determining the dispensing rate, based on the indicated forward speed and the operator settings;
a primer mechanism for sending a bypass signal to start the variable rate drive mechanism at a predetermined dispensing rate, the primer mechanism comprising:
an operator controlled primer button;
means for allowing the primer mechanism to run only when the indicated forward speed is below a minimum value;
means for allowing the primer mechanism to run for a predetermined length of time;
means for restoring the control means to determine the dispensing rate based on the indicated forward speed and the operator settings, in response to the forward speed reaching the minimum value.
a metering device for dispensing product from the agricultural implement at a determined rate;
a variable rate drive mechanism for driving the metering device;
control means operatively coupled to the variable drive mechanism, for generating a control signal to control the dispensing rate of the metering device, the control means comprising:
speed indicator means for indicating the forward speed of the implement relative to the ground;
means for allowing the operator to set parameter values determining the dispensing rate;
means for determining the dispensing rate, based on the indicated forward speed and the operator settings;
a primer mechanism for sending a bypass signal to start the variable rate drive mechanism at a predetermined dispensing rate.
implements, the metering assembly comprising:
a metering device for dispensing product from the agricultural implement at a determined rate;
a variable rate drive mechanism for driving the metering device;
control means operatively coupled to the variable drive mechanism, for generating a control signal to control the dispensing rate of the metering device, the control means comprising:
speed indicator means for indicating the forward speed of the implement relative to the ground;
means for allowing the operator to set parameter values determining the dispensing rate, from the tractor cab, during travelling;
means for determining the dispensing rate, based on the indicated forward speed and the operator settings;
a primer mechanism for sending a bypass signal to start the variable rate drive mechanism at a predetermined dispensing rate, the primer mechanism comprising:
an operator controlled primer button;
means for allowing the primer mechanism to run only when the indicated forward speed is below a minimum value;
means for allowing the primer mechanism to run for a predetermined length of time;
means for restoring the control means to determine the dispensing rate based on the indicated forward speed and the operator settings, in response to the forward speed reaching the minimum value.
5. A metering assembly for agricultural implements according to claim 4, wherein the predetermined dispensing rate is a computed dispensing rate.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002252321A CA2252321A1 (en) | 1998-10-30 | 1998-10-30 | Primer system for product distribution machines |
| CA002286490A CA2286490C (en) | 1998-10-30 | 1999-10-29 | Primer system for agriculture product distribution machines |
| DE69914280T DE69914280T2 (en) | 1998-10-30 | 1999-11-01 | Starting device for distributors of agricultural products |
| US09/432,053 US6285938B1 (en) | 1998-10-30 | 1999-11-01 | Primer system for agriculture product distribution machines |
| AU57189/99A AU757171B2 (en) | 1998-10-30 | 1999-11-01 | Primer system for product distribution machines |
| EP99308655A EP0997064B8 (en) | 1998-10-30 | 1999-11-01 | Primer system for agricultural product distribution machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002252321A CA2252321A1 (en) | 1998-10-30 | 1998-10-30 | Primer system for product distribution machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2252321A1 true CA2252321A1 (en) | 2000-04-30 |
Family
ID=4162980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002252321A Abandoned CA2252321A1 (en) | 1998-10-30 | 1998-10-30 | Primer system for product distribution machines |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU757171B2 (en) |
| CA (1) | CA2252321A1 (en) |
| DE (1) | DE69914280T2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019206734A1 (en) * | 2019-05-09 | 2020-11-12 | Deere & Company | Seed drill with predictive control |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025951A (en) * | 1989-10-31 | 1991-06-25 | Deere & Company | Electronic seed rate system for a grain drill |
| US5310113A (en) * | 1992-12-01 | 1994-05-10 | Cowgur Bruce E | Sprayer control system and method for using same |
| US5574657A (en) * | 1994-02-08 | 1996-11-12 | Micro-Trak Systems, Inc. | Electronic rate meter controller and method |
-
1998
- 1998-10-30 CA CA002252321A patent/CA2252321A1/en not_active Abandoned
-
1999
- 1999-11-01 DE DE69914280T patent/DE69914280T2/en not_active Expired - Lifetime
- 1999-11-01 AU AU57189/99A patent/AU757171B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU757171B2 (en) | 2003-02-06 |
| AU5718999A (en) | 2000-05-04 |
| DE69914280D1 (en) | 2004-02-26 |
| DE69914280T2 (en) | 2004-12-30 |
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