Systems and methods for controlling air-assisted delivery systems in agricultural harvesters

Abstract

An air-assisted delivery system for an agricultural harvester includes a controller configured to receive a first sensor signal indicating a first air pressure at a first location within a line, and a second sensor signal indicating a second air pressure at a second location within the line. Furthermore, the controller is configured to determine an air pressure difference based on the first air pressure and the second air pressure. In response to determining that the air pressure difference is greater than a threshold, the controller is configured to control a supplemental air source to provide supplemental air to the line for a supplemental air duration. Additionally, in response to determining that the air pressure difference is greater than the threshold during the supplemental air duration, the controller is configured to control a working air source to increase the working airflow through the line.

Description

Technical Field

[0001] This disclosure generally relates to systems and methods for controlling air-assisted delivery systems for agricultural harvesters. Background Technology

[0002] Agricultural harvesters are used to harvest agricultural products (e.g., cotton or other natural materials (one or more)). For example, an agricultural harvester may include a harvesting platform with rollers configured to harvest agricultural products from a field. The harvester may also include an air-assisted conveying system configured to move the agricultural products from the rollers to a collector. The agricultural products can then be fed into a baler (e.g., via belts (one or more)). The baler can compress the agricultural products into a bundle for storage, transport, and handling. For example, a circular baler can compress the agricultural products into circular bales within the baling chamber, such that the circular bales have a desired size and density. After bale formation, the bale can be wrapped with a bale wrapping material to secure the agricultural products within the bale and substantially maintain its shape. Unfortunately, under certain operating conditions, agricultural products may become congested in at least one line of the air-assisted conveying system, interfering with the operation of the agricultural harvester. Summary of the Invention

[0003] In some embodiments, an air-assisted delivery system for an agricultural harvester includes a controller having a memory and a processor. The controller is configured to receive a first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system, and the controller is configured to receive a second sensor signal indicating a second air pressure at a second location within the line of the air-assisted delivery system. Furthermore, the controller is configured to determine an air pressure difference based on the first air pressure and the second air pressure. In response to determining that the air pressure difference is greater than a threshold, the controller is configured to control a supplemental air source to supply supplemental air to the line for a supplemental air duration. Additionally, in response to determining that the air pressure difference is greater than the threshold during the supplemental air duration, the controller is configured to control a working air source to increase the working airflow through the line. Attached Figure Description

[0004] These and other features, aspects, and advantages of this disclosure will be better understood when the following detailed description is read with reference to the accompanying drawings, in which the same characters denote the same parts, wherein:

[0005] Figure 1 A side view of an embodiment of an agricultural system with an air-assisted delivery system;

[0006] Figure 2 To be able to Figure 1A schematic diagram of an embodiment of an air-assisted delivery system used in an agricultural system;

[0007] Figure 3 To be able to Figure 2 A perspective view of an embodiment of a circuit assembly used within an air-assisted delivery system;

[0008] Figure 4 To be able to be presented Figure 2 A view of an embodiment of a visual representation of data on a display of an air-assisted delivery system; and

[0009] Figure 5 This is a flowchart of an embodiment of a method for controlling an air-assisted delivery system. Detailed Implementation

[0010] One or more specific embodiments of this disclosure will now be described. To provide a concise description of these embodiments, not all features of an actual implementation may be described in the specification. It should be understood that, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developer's specific objectives, such as compliance with system-related and business-related constraints, which may differ from implementation to implementation. Furthermore, it should be understood that such development work may be complex and time-consuming, but remains a routine task of design, fabrication, and manufacturing for those skilled in the art who benefit from this disclosure.

[0011] When describing elements of various embodiments of this disclosure, the articles “a” and “the” are intended to indicate the presence of one or more elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that additional elements may exist in addition to those listed. Any examples of operating parameters and / or environmental conditions do not exclude other parameters / conditions for the disclosed embodiments.

[0012] Figure 1This is a side view of an embodiment of an agricultural system 10 (e.g., a harvester, agricultural harvester) with an air-assisted conveying system. The agricultural system 10 is configured to harvest agricultural products 12 (e.g., cotton) from a field 14 and form the agricultural products 12 into bales (e.g., agricultural bales). In the illustrated embodiment, the agricultural system 10 includes a harvesting table 16 having rollers configured to harvest the agricultural products 12 from the field 14. Additionally, the agricultural system 10 includes an air-assisted conveying system 18 configured to move the agricultural products 12 from the rollers of the harvesting table 16 to a collector. The agricultural products 12 can then be fed, for example, via belts (one or more) to a baler 20 (e.g., an agricultural baler). The baler 20 is supported by and / or mounted within or on the chassis of the agricultural system 10. The baler 20 can form the agricultural products 12 into round bales. However, in other embodiments, the baler 20 of the agricultural system 10 can form agricultural products into square bundles, polygonal bundles, or other suitable shapes (one or more). After the agricultural products 12 are formed into bundles, the bundling system of the agricultural system 10 wraps the bundles with a bundling material to secure the agricultural products 12 inside the bundles and substantially maintain the shape of the bundles.

[0013] As discussed in detail below, the air-assisted delivery system 18 includes a controller with a memory and a processor. The controller is configured to receive a first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system, and the controller is configured to receive a second sensor signal indicating a second air pressure within the line of the air-assisted delivery system. Additionally, the controller is configured to determine an air pressure difference based on the first and second air pressures. The controller is configured to compare the air pressure difference with a threshold. The threshold may correspond to a pressure difference associated with an impending blockage. An impending blockage may correspond to an operating condition (e.g., insufficient airflow) that is highly likely to eventually lead to a blockage (e.g., accumulation of produce within the line). The controller is configured to control a supplemental air source to provide supplemental air to the line for the duration of the supplemental air supply in response to determining that the air pressure difference is greater than the threshold. Furthermore, the controller is configured to control a working air source to increase the working airflow through the line in response to determining that the air pressure difference is greater than the threshold during the supplemental air supply duration. Therefore, the likelihood of blockages occurring within the line can be significantly reduced or eliminated, thereby improving the efficiency of the agricultural system.

[0014] Figure 2 For can be used Figure 1This is a schematic diagram of an embodiment of an air-assisted conveying system 18 within an agricultural system. As previously discussed, the air-assisted conveying system 18 is configured to move produce from the rollers of a harvester 16 to a collector. The air-assisted conveying system 18 may include one or more lines 22, and each line guides produce (e.g., cotton or other natural materials (one or more)) from a corresponding roller of the harvester 16 to the collector. For example, in some embodiments, the air-assisted conveying system 18 may include 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or more lines (e.g., corresponding to the number of rollers in the harvester). Furthermore, in some embodiments, multiple lines (e.g., 2, 3, 4 or more) can guide produce from a single roller to the collector, and / or a single line can guide produce from multiple rollers (e.g., 2, 3, 4 or more) to the collector.

[0015] In the illustrated embodiments, the air-assisted conveying system 18 includes a working air source 24. The working air source 24 is configured to provide a working airflow through each line 22, thereby driving produce from the harvester 16 to the collector. In some embodiments, the rollers of the harvester 16 are configured to output produce to the lines 22 of the air-assisted conveying system 18, and the working air source 24 is configured to provide a working airflow through the lines 22 sufficient to move the produce to the collector. The working air source 24 may include one or more blowers (e.g., fans, etc.) and one or more motors (e.g., electric motors, pneumatic motors, hydraulic motors, etc.) configured to drive the blowers. For example, in some embodiments, the working air source may include a single motor coupled to a single blower, and the single blower may provide a corresponding working airflow to each line. Furthermore, in some embodiments, the working air source may include a blower for each line, and the corresponding motor may drive each blower, thereby providing individual control over the working airflow through each line.

[0016] Furthermore, in the illustrated embodiment, the air-assisted delivery system 18 includes a supplemental air source 26. As discussed in detail below, the supplemental air source 26 can be activated in response to the detection of a potential blockage in line 22, thereby reducing the likelihood of a blockage occurring in line 22. In the illustrated embodiment, the supplemental air source 26 includes one or more air pumps 28, one or more tanks 30, and a valve assembly 32. For example, the supplemental air source may include 1, 2, 3, 4, 5, 6, or more air pumps, and / or the supplemental air source may include 1, 2, 3, 4, 5, 6, or more tanks. Each air pump 28 may be driven by one or more motors (e.g., one or more electric motors, one or more pneumatic motors, one or more hydraulic motors, etc.), and the pumps 28 (one or more) fluidly coupled to the tanks 30 (one or more) can output pressurized air to the tanks 30 (one or more), which can store the pressurized air. The valve assembly 32 is fluidly coupled to the tanks 32 (one or more) and one or more conduits 34. Each conduit 34 is fluidly connected to line 22, thereby allowing supplemental air from supplemental air source 26 to flow into line 22. In the illustrated embodiment, three conduits 34 extend from valve assembly 32 to each line 22 of air-assisted delivery system 28. However, in other embodiments, more or fewer conduits may extend to each line. For example, in some embodiments, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more conduits may extend to each line. Furthermore, in some embodiments, more conduits may extend to one line and fewer conduits to another. The conduits 34(one or more) may be fluidly coupled to each line 22 at any suitable location(s) along the line. For example, in some embodiments, the outlets of the conduits 34 may be spaced approximately equally from each other along line 22.

[0017] The supplemental air source 26 is configured to provide supplemental air to each line 22, thereby temporarily increasing the airflow through the line 22, which can reduce the likelihood of blockage in the line 22. For example, the supplemental air source 26 can be activated by opening one or more valves of the valve assembly 32, allowing supplemental air to flow from one or more tanks 30 via corresponding conduits 34 to one or more lines 22. As the air pressure within the tanks 30 decreases, pumps 28 can be automatically activated to increase the air pressure within the tanks 30. For example, in some embodiments, the supplemental air source 26 may include a pressure sensor configured to monitor the air pressure within each tank 30. In response to the air pressure within the tank decreasing below a threshold, pumps 28 can be activated to increase the air pressure. Furthermore, in some embodiments, the valve assembly 32 may include a valve for each conduit 34, thereby providing individual control over the supplemental airflow through the conduit 34. However, in other embodiments, the valve assembly 32 may include a valve for each set of conduits 34. The set of conduits 34 may include each conduit fluidly coupled to a corresponding line 22, thereby providing individual control over the supplemental airflow through the line 22. Additionally, in some embodiments, the valve assembly 32 may include a single valve configured to selectively facilitate supplemental airflow through all conduits 34. Furthermore, at least one valve in the valve assembly 32 may be an on / off valve having only open and closed positions (e.g., each valve in the valve assembly may be an on / off valve), and / or at least one valve in the valve assembly 32 may be a control valve (e.g., a proportional control valve) configured to change the rate of supplemental airflow through the valve (e.g., each valve in the valve assembly may be a control valve).

[0018] While the supplemental air source 26 in the illustrated embodiments includes pumps 28(one or more), tanks 30(one or more), and valve assembly 32, in other embodiments, at least one component of the supplemental air source may be omitted, and / or the supplemental air source may include additional components(one or more). For example, in some embodiments, tanks(one or more) may be omitted, and pumps(one or more) may be directly fluidly coupled to the valve assembly. Furthermore, in some embodiments, tanks(one or more) and valve assembly may be omitted, and pumps(one or more) may be directly fluidly coupled to conduits(one or more). For example, pumps(one or more) may be selectively activated to provide supplemental airflow through each conduit fluidly coupled to the activated pump(one or more). In some embodiments, supplemental air source 26 may include one pump 28 for each conduit 34, thereby providing individual control over the supplemental airflow through the conduit 34. However, in other embodiments, supplemental air source may include one pump 28 for each set of conduits 34. The set of conduits 34 may include each conduit fluidly coupled to a corresponding line 22, thereby providing individual control over the supplemental airflow through the line 22. Additionally, in some embodiments, the supplemental air source 26 may include a single pump 28 configured to selectively facilitate the flow of supplemental air through all ducts 34.

[0019] In the illustrated embodiments, the air-assisted delivery system 18 includes a controller 36 communicatively coupled to the working air source 24 and the supplementary air source 26. In some embodiments, the controller 36 is an electronic controller with circuitry configured to control the working air source 24 and the supplementary air source 26. In the illustrated embodiments, the controller 36 includes a processor (such as the illustrated microprocessor 38) and a memory device 40. The controller 36 may also include one or more storage devices and / or other suitable components (one or more). The processor 38 can be used to execute software, such as software for controlling the working air source 24 and the supplementary air source 26. Furthermore, the processor 38 may include multiple microprocessors, one or more "general-purpose" microprocessors, one or more application-specific microprocessors, and / or one or more application-specific integrated circuits (ASICs), or a combination thereof. For example, the processor 38 may include one or more Reduced Instruction Set Computing (RISC) processors.

[0020] Memory device 40 may include volatile memory, such as random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM). Memory device 40 may store various types of information and may be used for various purposes. For example, memory device 40 may store processor-executable instructions (e.g., firmware or software) for execution by processor 38, such as instructions for controlling the working air source 24 and the supplementary air source 26. One or more storage devices (e.g., non-volatile storage devices) may include ROM, flash memory, hard disk drives, or any other suitable optical, magnetic, or solid-state storage media, or combinations thereof. Storage devices (one or more) may store data, instructions (e.g., software or firmware for controlling the working air source 24 and the supplementary air source 26), and any other suitable data.

[0021] In the illustrated embodiment, the air-assisted delivery system 18 includes a user interface 42 communicatively coupled to the controller 36. The user interface 42 is configured to receive input from an operator and provide information to the operator. The user interface 42 may include any suitable input device(s) for receiving input, such as a keyboard, mouse, buttons(s), switches(s), knobs(s), other suitable input devices(s), or combinations thereof. Additionally, the user interface 42 may include any suitable output device(s) for presenting information to the operator, such as speakers(s), indicator lights(s), other suitable output devices(s), or combinations thereof. In the illustrated embodiment, the user interface 42 includes a display 44 configured to present visual information to the operator. In some embodiments, the display 44 may include a touchscreen interface configured to receive input from the operator.

[0022] In some embodiments, controller 36 is configured to determine an initial working air velocity based on the flow rate of agricultural products through line 22(one or more) and the ground velocity of the agricultural system. Additionally, in some embodiments, controller 36 is configured to receive the initial working air velocity (e.g., from user interface 42). During operation of the agricultural system, controller 36 is configured to control working air source 24 to output the initial working air velocity.

[0023] Furthermore, the air-assisted delivery system 18 includes a pressure sensor fluidly coupled to at least one line 22. In the illustrated embodiment, the air-assisted delivery system 18 includes a first pressure sensor 46 fluidly coupled to line 22 at a first location along line 22, and the first pressure sensor 46 is configured to output a first sensor signal indicating a first air pressure at the first location within line 22. Additionally, the air-assisted delivery system 18 includes a second pressure sensor 48 fluidly coupled to line 22 at a second location along line 22, and the second pressure sensor 48 is configured to output a second sensor signal indicating a second air pressure at the second location within line 22. Furthermore, the air-assisted delivery system 18 includes a third pressure sensor 50 fluidly coupled to line 22 at a third location along line 22, and the third pressure sensor 50 is configured to output a third sensor signal indicating a third air pressure at the third location within line 22. Each pressure sensor may include any suitable device(s) configured to monitor air pressure within the line, such as a piezoelectric pressure sensor, a capacitive pressure sensor, etc. Furthermore, as used in this article, “air pressure” refers to static air pressure (e.g., pressure independent of air movement).

[0024] In the illustrated embodiment, a first position is located near the outlet 52 of line 22, and a second position is located near the inlet 54 of line 22. Furthermore, a third position is located along the line between the first and second positions. However, in other embodiments, each position may be located at any suitable location along the line. Additionally, while three pressure sensors are fluidly coupled to line 22 in the illustrated embodiment, in other embodiments, more or fewer pressure sensors may be coupled to the line (e.g., 2, 4, 5, 6, or more). For example, in some embodiments, the third pressure sensor may be omitted. Furthermore, although pressure sensors are fluidly coupled to a single line in the illustrated embodiment, in other embodiments, pressure sensors may be fluidly coupled to multiple lines. For example, multiple pressure sensors may be fluidly coupled to each line of an air-assisted delivery system.

[0025] In some embodiments, controller 36 is configured to receive a first sensor signal indicating a first air pressure at a first location within line 22, and controller 36 is configured to receive a second sensor signal indicating a second air pressure within line 22. Furthermore, controller 36 is configured to determine an air pressure difference based on the first and second air pressures. For example, controller 36 may be configured to subtract the first air pressure from the second air pressure to determine the air pressure difference. As previously discussed, in some embodiments, the first location is positioned near the outlet 52 of line 22, and the second location is positioned near the inlet 54 of line 22. Thus, the air pressure difference corresponds to the air pressure difference over a large portion of line 22. However, in some embodiments, each location may be positioned at any suitable location along the line.

[0026] Additionally, controller 36 is configured to compare the pressure difference with a threshold. The threshold may correspond to a pressure difference associated with an impending blockage. An impending blockage may correspond to an operating condition (e.g., insufficient airflow) that is highly likely to eventually lead to a blockage (e.g., agricultural products piling up within the line). Controller 36 is configured to control supplemental air source 26 (e.g., pump 28(one or more) and / or valve assembly 32) to supply supplemental air to line 22 for the duration of supplemental air supply in response to determining that the air pressure difference is greater than the threshold. Furthermore, controller 36 is configured to control working air source 24 to increase the working airflow through line 22 (e.g., by increasing the speed of a blower) in response to determining that the air pressure difference is greater than the threshold during the supplemental air supply duration. Thus, if the supplemental air supplied by supplemental air source 26 is insufficient to establish a pressure difference less than or equal to the threshold, the working airflow supplied by working air source 24 is increased. By increasing the airflow through line 22 (e.g., solely via supplemental airflow or in combination with increased working airflow), the likelihood of blockage occurring within line 22 can be significantly reduced or eliminated, thereby improving the efficiency of the agricultural system.

[0027] The threshold can be expressed as a pressure value (e.g., pounds per square inch (psi), Pascals, bar, etc.) or a percentage of a second air pressure (e.g., the maximum air pressure). For example, the threshold can be 2 to 50 psi, 5 to 25 psi, or 10 to 15 psi. As a further example, the threshold can be 25%, 20%, 15%, 10%, or 5% of the second air pressure. The threshold can be manually entered via user interface 42, and / or the threshold can be determined by controller 36. In some embodiments, controller 36 can determine the threshold via machine learning. For example, if the air pressure difference is less than or equal to an initial threshold (e.g., entered via user interface), but a blockage is detected (e.g., based on input to the user interface), the controller can store the air pressure difference (one or more) over a period of time before the blockage was detected. The controller can use these air pressure differences (one or more) (e.g., in conjunction with other air pressure differences (one or more) determined before a blockage is detected, such as during other blockages occurring during the operation of the agricultural system and / or during blockages occurring during the operation of other agricultural systems (one or more)) to train a machine learning process. The controller can then use the machine learning process to determine thresholds that significantly reduce or eliminate the likelihood of a blockage. In some embodiments, the machine learning process can generate different thresholds (e.g., represented by tables (one or more), empirical formulas (one or more), curve fittings (one or more), etc.) that vary based on crop type, environmental conditions, system configuration, or a combination thereof. Furthermore, in some embodiments, the controller can be configured to determine the thresholds based on one or more parameters, such as crop type, moisture content of the crop, system configuration, environmental conditions, other suitable parameters (one or more), or a combination thereof.

[0028] In addition, the duration of supplemental air can be selected and / or determined. For example, the duration of supplemental air can be input into the user interface 42, and / or the duration of supplemental air can be determined by the controller 36 (e.g., based on the flow rate of the produce through one or more lines 22, the moisture content of the produce, system configuration, environmental conditions, other suitable parameters (one or more), or a combination thereof). The duration of supplemental air can be 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, 6 seconds, 7 seconds, 8 seconds, 9 seconds, 10 seconds, 15 seconds, 20 seconds, 30 seconds, 40 seconds, or one minute.

[0029] In some embodiments, controller 36 is configured to receive a third sensor signal indicating a third air pressure at a third location within line 22. In such embodiments, controller 36 may be configured to determine an air pressure difference based on a first air pressure, a second air pressure, and a third air pressure. For example, the controller may determine the air pressure difference by subtracting the first air pressure from the third air pressure to establish a first pressure change, and by subtracting the second air pressure from the third air pressure to establish a second pressure change. The controller may set the pressure difference to the maximum or minimum value of the pressure change, or the controller may average the pressure changes to establish the pressure difference. In embodiments with additional monitored pressures along the line, the controller may determine the pressure difference in the same manner (e.g., the minimum, maximum, or average value of the pressure change). Furthermore, in some embodiments, the controller may use another suitable technique to determine the pressure difference based on the monitored air pressures (e.g., the median of the pressure changes, a curve fit of the monitored air pressures, etc.).

[0030] In some embodiments, controller 36 is configured to average at least one air pressure (e.g., each air pressure) over a period of time before determining the air pressure difference. For example, controller 36 may be configured to receive sensor signals from at least one sensor (e.g., each sensor) at a certain sampling rate, and controller 36 may average the corresponding air pressure over a period of time greater than the reciprocal of the sampling rate. For example, the sampling rate may be 10 Hz, and the controller may average the air pressures over one second, such that 10 air pressures are averaged. Thus, in some embodiments, the controller may determine the pressure difference based on the average of a first air pressure over a period of time, the average of a second air pressure over the same period of time, and, in some embodiments, the average of a third air pressure over the same period of time. However, in other embodiments, only a portion of the air pressures may be averaged (e.g., one or more), or the air pressures may not be averaged at all (e.g., the controller may determine the air pressure difference based on each individual air pressure measurement).

[0031] In some embodiments, controlling the working air source 24 to increase the working airflow involves iteratively increasing the working airflow (e.g., the speed of the blower) until the air pressure difference is less than or equal to a threshold or a maximum number of iterations is reached. For example, if increasing the working airflow through line 22 is insufficient to terminate an impending blockage, controller 36 may continue to increase the working airflow until the air pressure difference is less than or equal to the threshold. However, after the maximum number of iterations, controller 36 may terminate the process of increasing the working airflow through the line. In some embodiments, the controller is configured to increase the working airflow in fixed increments. For example, the controller may be configured to increase the speed of the blower of the working air source in fixed rotational speed increments (e.g., 50 RPM, 75 RPM, 100 RPM, 150 RPM, 200 RPM, etc.). Furthermore, in some embodiments, the controller is configured to increase the working airflow in variable increments. For example, the controller may determine the increment based on the pressure difference (e.g., a higher pressure difference is used for a higher increment, and a lower pressure difference is used for a lower increment). Additionally, the maximum number of iterations can be set to any suitable value, such as 1, 2, 3, 4, 5, 6, 7, 8, or greater (e.g., depending on the size of the increment). For example, in some embodiments, the maximum number of iterations can be 1, such that the controller increases the working airflow only once (e.g., increases the working airflow without iteration).

[0032] In some embodiments, controller 36 is configured to control supplemental air source 26 (e.g., pump 28(one or more) and / or valve assembly 32) to provide supplemental air for the duration of the supplemental air supply in response to each increase in the working air flow. Thus, the airflow through line 22 may include a combination of supplemental air flow and increased working air flow. Consequently, the likelihood of establishing a pressure differential less than or equal to a threshold may be greater than simply increasing the working air flow (e.g., not providing supplemental air). However, in other embodiments, supplemental air may not be provided in response to each increase in the working air flow.

[0033] In the illustrated embodiment, controller 36 is communicatively coupled to speed control system 56, which is configured to control the ground speed of the agricultural system. Speed ​​control system 56 may include an engine output control system and / or a transmission control system. The engine output control system is configured to change the engine output to control the speed of the agricultural system. For example, the engine output control system may change the engine throttle setting, the engine fuel / air mixture, the engine timing, other suitable engine parameters, or combinations thereof, to control the engine output. Additionally, the transmission control system may adjust the gear ratio within the transmission to control the speed of the agricultural system. For example, the transmission control system may adjust the gear ratio by adjusting the gear selection in a transmission with discrete gears, or the transmission control system may adjust the gear ratio by controlling a continuously variable transmission (CVT). In some embodiments, the speed control system may include other suitable systems (one or more) (e.g., individually or in combination with the systems described above) to facilitate the adjustment of the agricultural system speed, such as an electric motor controller for an electric motor.

[0034] In some embodiments, controller 36 is configured to control speed control system 56 to reduce the ground speed of the agricultural system in response to reaching a maximum number of iterations. Reaching the maximum number of iterations may indicate that simply increasing airflow may not be sufficient to terminate an impending blockage. Therefore, controller 36 may reduce the ground speed of the agricultural system, thereby reducing the flow rate of produce through line 22. As a result, the working airflow (e.g., alone or in combination with supplemental airflow) may be sufficient to establish a pressure differential less than or equal to a threshold, thereby terminating the impending blockage.

[0035] In some embodiments, controlling the speed control system 56 to reduce the ground speed of the agricultural system involves iteratively reducing the ground speed until the air pressure difference is less than or equal to a threshold. For example, if reducing the ground speed of the agricultural system is insufficient to terminate an impending congestion, the controller 36 may continue to reduce the ground speed until the air pressure difference is less than or equal to the threshold. In some embodiments, the controller is configured to reduce the ground speed in fixed increments (e.g., 0.25 km / hr, 0.5 km / hr, 0.75 km / hr, 1 km / hr, 1.25 km / hr, etc.) or in fixed percentages (e.g., 5%, 10%, 15%, etc.). Furthermore, in some embodiments, the controller is configured to reduce the ground speed in variable increments / percentages. For example, the controller may determine the increment / percentage based on the pressure difference (e.g., a higher pressure difference is used for a higher increment / percentage, and a lower pressure difference is used for a lower increment / percentage). In some embodiments, the controller may implement a delay (e.g., 10 seconds, 30 seconds, 1 minute, 2 minutes, etc.) between reducing the ground speed and comparing the air pressure difference with a threshold. Thus, the agricultural system may reach a steady state before the air pressure difference comparison. Furthermore, in some embodiments, the controller may determine that the maximum number of times the ground speed reduction has been reached (e.g., the ground speed has been reduced to below a rate sufficient for harvesting crops within a reasonable time), and in response, the controller may terminate the ground speed reduction and control the user interface to present an indication of the status / condition to the operator. While iteratively reducing the ground speed of the agricultural system has been disclosed above, in some embodiments, the controller may reduce the ground speed only once (e.g., the ground speed may be reduced without iteration).

[0036] In some embodiments, after the speed control system reduces the ground speed (e.g., iteratively reduces the ground speed) so that the air pressure difference is less than or equal to a threshold, the controller 36 is configured to iteratively reduce the working airflow until the air pressure difference is greater than a second threshold. For example, the controller 36 may control the working air source 24 to iteratively reduce the working airflow. As previously discussed, the flow rate of agricultural products through line 22 may decrease due to the reduction in ground speed. Therefore, the working airflow can be reduced to provide a target airflow rate for the flow rate of agricultural products. An increase in the air pressure difference above the second threshold may indicate that the flow rate of the working airflow is not significantly greater than the target airflow rate. The second threshold may be less than the threshold disclosed above such that the air pressure difference lies between the threshold and the second threshold after the working airflow is reduced. Alternatively, the second threshold may be expressed as a pressure value (e.g., in pounds per square inch (psi), Pascals, bar, etc.) or a second air pressure (e.g., the maximum air pressure).

[0037] In each case where the controller 36 compares the air pressure difference with a threshold (e.g., a threshold or a second threshold), the controller can determine the air pressure difference based on the air pressure, as described above. In some embodiments, after each adjustment of the working airflow and / or activation of the supplemental air source, the controller 36 may wait for a period of time (e.g., a delay) before comparing the air pressure difference with the threshold (e.g., a threshold or a second threshold), allowing the airflow to reach a substantially stable state before the comparison. The delay may be 1 second, 2 seconds, 5 seconds, 10 seconds, or any other suitable time period. Although the controller 36 in the embodiments disclosed above is configured to control the supplemental air source 26 and the speed control system 56 based on the air pressure difference, in some embodiments, the controller may be configured to control either the supplemental air source (e.g., in embodiments where the speed control system is omitted) or the speed control system (e.g., in embodiments where the supplemental air source is omitted).

[0038] Furthermore, in some embodiments, the controller 36 may control the speed control system 56 to increase the ground speed of the agricultural system over a period of time (e.g., a delay) after a reduction in ground speed or working airflow. For example, the controller 36 may control the speed control system 56 to increase the ground speed (e.g., in one or more steps / increments) to the initial ground speed (e.g., the ground speed of the agricultural system before the ground speed was reduced). After the ground speed is increased to the initial ground speed, processes of controlling the working air source and supplementing the air source or at least one of the speed control system may be performed.

[0039] In some embodiments, the controller 36 is configured to control the supply air source 26 (e.g., valve assembly 32 and / or pump 28(one or more)) to control the flow of supply air to different sections of line 22 in response to activation of the supply air source 26. As previously discussed, a plurality of conduits 34 may extend between the supply air source 26 and line 22. Additionally, each conduit 34 may be fluidly coupled to a corresponding section of line 22. In some embodiments, the controller 36 is configured to determine the location of an impending blockage within line 22 based on feedback from a pressure sensor. In such embodiments, the controller 36 may control the supply air source 26 to supply supply air to the conduit 34 fluidly coupled to line 22 at the section corresponding to the location of the impending blockage. Furthermore, in some embodiments, the controller may control the supply air source to supply supply air to each conduit and to supply supply air at a higher flow rate to the conduit fluidly coupled to line at the section corresponding to the location of the impending blockage. In other embodiments, the controller may not be aware of the location of the impending blockage, and the controller may control the supplemental air source to provide supplemental air at the same flow rate to each duct.

[0040] Furthermore, in some embodiments, the controller 36 can control the supplemental air source 26 (e.g., valve assembly 32 and / or pump 28(one or more)) to control the flow rate of the supplemental air. For example, in embodiments where the supplemental air source 26 includes a valve assembly 32 with control valves(one or more), the controller 36 can control the valves(one or more) of the valve assembly 32 based on a pressure differential to establish a target supplemental air flow rate(one or more). Furthermore, in embodiments where the valve assembly and the tank(one or more) are omitted, the controller 36 can control the pump(one or more) based on a pressure differential to establish a target supplemental air flow rate(one or more).

[0041] In some embodiments, a process of controlling at least one of a working air source and a supplementary air source or a speed control system based on a determined pressure difference can be performed for multiple lines. For example, in some embodiments, the air-assisted delivery system 18 includes multiple lines 22, and pressure sensors are fluidly coupled to individual lines. In such embodiments, the controller can determine a single air pressure difference for the monitored line and control at least one of a working air source and a supplementary air source or a speed control system based on said single air pressure difference. For example, in an embodiment where the working air source has a single blower supplying working air to the line, the controller can control said single blower. Furthermore, in an embodiment where the working air source has a blower for each line, the controller can control the blowers to supply the same working air flow to each line. Additionally, in an embodiment where the supplementary air source includes a single valve controlling the supplementary air flow to a duct, the controller can control said single valve to supply the same supplementary air flow to each duct. In embodiments where the supplemental air source includes multiple valves, the controller can control the valves to provide the same supplemental air flow to each conduit (e.g., such that the same supplemental air flow is provided to each segment of each line), or the controller can control the valves to provide the same supplemental air flow to a corresponding segment of each line (e.g., as discussed above regarding providing supplemental air to a segment with an impending blockage). Furthermore, in embodiments where the supplemental air source includes a single pump without valve assemblies / tanks (one or more), the controller can control the single pump to provide supplemental air flow to each conduit. In embodiments where the supplemental air source includes multiple pumps without valve assemblies / tanks (one or more), the controller can control the pump to provide the same supplemental air flow to each conduit.

[0042] In some embodiments, the air-assisted delivery system 18 includes a plurality of lines 22, and pressure sensors are fluidly coupled to the plurality of lines (e.g., all lines). In such embodiments, the controller can determine a plurality of air pressure differentials for the monitored lines and control at least one of a working air source and a supplementary air source or a speed control system based on the plurality of air pressure differentials. In embodiments where the working air source has a blower for each line, the controller can control each blower based on the pressure differential within the respective line. For example, the controller can increase the working air flow only to the lines(one or more) where the air pressure differential is greater than a threshold. In embodiments where the supplementary air source includes a plurality of valves, the controller can control the valve(one or more) associated with each line based on the pressure differential within the line. For example, the controller can open the valve(one or more) associated with the lines(one or more) where the air pressure differential is greater than a threshold. Furthermore, as discussed above regarding providing supplementary air to sections with impending blockage, the controller can control the valve associated with each line where the pressure differential is greater than a threshold to provide supplementary air flow to the sections with impending blockage. Additionally, in embodiments where the supplemental air source comprises multiple pumps but no valve assembly / tank(s), the controller can control the pump(s) associated with each line based on the pressure differential within the line. For example, the controller can control the pump(s) to supply supplemental air to the lines(s) where the air pressure differential is greater than a threshold. Furthermore, as discussed above regarding supplying supplemental air to sections with impending congestion, the controller can control the pump associated with each line where the pressure differential is greater than the threshold to supply supplemental airflow to the section with impending congestion. Moreover, regarding the speed control system, the controller can control the speed control system to reduce ground speed in response to a pressure differential greater than a threshold in any line.

[0043] Figure 3 To be able to Figure 2 A perspective view of an embodiment of a line assembly 57 used within an air-assisted delivery system. In the illustrated embodiment, the line assembly 57 includes a main channel 58 configured to facilitate the flow of working air, and a secondary channel 60 configured to facilitate the flow of supplemental air. In the illustrated embodiment, the main channel 58 corresponds to the above reference. Figure 2 The disclosed line 22 and secondary channel 60 correspond to the above reference. Figure 2 The disclosed conduit 34. The outlet 62 of the secondary channel 60 facilitates supplemental airflow to the working airflow through the main channel 58. In some embodiments, the line assembly 57 includes elements corresponding to those referenced above. Figure 2The disclosed plurality of conduits 34 have multiple individual secondary channels 60. Therefore, the flow of supplemental air to each portion of the main channel 58 / line 22 can be controlled independently. Furthermore, in some embodiments, the line assembly 57 may include a single secondary channel 60 having multiple outlets 62 disposed along the secondary channel 60 / main channel 58. Therefore, supplemental air can be provided to multiple locations along the main channel 58 / line 22. Although the line assembly 57 includes a main channel 58 and secondary channels 60 in the illustrated embodiment, in other embodiments, the line assembly may have other suitable structures, such as multiple conduits extending to the line, wherein working air flows through the line and the conduits provide supplemental air to the line. In embodiments where the air-assisted delivery system includes multiple lines, the air-assisted delivery system may include line assemblies of the same type, such as... Figure 3 Line components, or air-assisted delivery systems, can contain different types of line components.

[0044] Figure 4 To be able to be presented Figure 2 This is a view of an embodiment of a visual representation of data 64 on a display 44 of an air-assisted delivery system. In the illustrated embodiment, data 64 includes a bar graph 66 of air pressure drops within the lines. Figure 66 includes dashed lines 68 representing thresholds. In the illustrated embodiment, the air-assisted delivery system includes five lines, and the air pressure difference within four lines is less than the threshold. However, the air pressure difference within one line is greater than the threshold. Figure 66 allows the operator to easily identify the line with an air pressure difference greater than the threshold. In some embodiments, the controller may control the display to change the color of one or more bars extending beyond the dashed lines 68, thereby providing the operator with additional indication of the line with an air pressure difference greater than the threshold. Although data 64 includes Figure 66 in the illustrated embodiment, the figure may be omitted in other embodiments.

[0045] Furthermore, in the illustrated embodiments, data 64 includes an indication threshold 70, agricultural product flow rate 72, working air flow rate 74 (e.g., output of a working air source), maximum air pressure difference between lines 76 (e.g., air pressure difference of a single monitored line in an embodiment monitoring only one line), the location 78 of the maximum air pressure difference within a line, and a ground velocity value 79. In other embodiments, at least one value may be omitted and / or at least one additional value may be provided (e.g., a second threshold, minimum air pressure difference within a line, etc.). Additionally, in some embodiments, values ​​may be omitted.

[0046] Figure 5 This is a flowchart of an embodiment of a method 80 for controlling an air-assisted delivery system. Method 80 can be seen from the above reference. Figure 2The method may be executed by the disclosed controller or any other suitable controller(s). Furthermore, the steps of method 80 may be performed in the order disclosed herein or in any other suitable order. For example, certain steps of the method may be performed simultaneously. Additionally, in some embodiments, at least one step of method 80 may be omitted.

[0047] Method 80 includes receiving a first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system, as shown in block 82. As previously discussed, the first sensor signal can be received from a first pressure sensor fluidly connected to the line at the first location. Additionally, method 80 includes receiving a second sensor signal indicating a second air pressure at a second location within the line of the air-assisted delivery system, as shown in block 84. As previously discussed, the second sensor signal can be received from a second pressure sensor fluidly connected to the line at the second location. Furthermore, in some embodiments, method 80 includes receiving a third sensor signal indicating a third air pressure at a third location within the line of the air-assisted delivery system, as shown in block 86. As previously discussed, the third sensor signal can be received from a third pressure sensor fluidly connected to the line at the third location. As shown in block 88, an air pressure difference is determined based on the first air pressure, the second air pressure, and, in some embodiments, the third air pressure. As previously discussed... Figure 2 The pressure difference can be determined based on the monitored air pressure using any suitable technique discussed.

[0048] As shown in box 90, the air pressure difference is compared to a threshold. As previously discussed, the threshold may correspond to a pressure difference associated with an impending blockage. An impending blockage may correspond to an operating condition (e.g., insufficient airflow) that is highly likely to eventually lead to a blockage (e.g., produce piling up within the line). In response to determining that the air pressure difference is greater than the threshold, a supplemental air source (e.g., pump(s) and / or valve assembly) is controlled to supply supplemental air to the line for the duration of the supplemental air supply, as shown in box 92. As previously discussed, the supplemental air supply duration may be input into the user interface and / or may be determined (e.g., based on the flow rate of produce through the line, the moisture content of the produce, system configuration, environmental conditions, other suitable parameters(s), or combinations thereof).

[0049] Furthermore, as shown in block 94, the air pressure difference is compared to a threshold during the supplemental air duration. In response to determining that the air pressure difference is not greater than the threshold during the supplemental air duration, the method returns to block 82. However, in response to determining that the air pressure difference is greater than the threshold during the supplemental air duration, the number of iterations is compared to a maximum number of iterations, as shown in block 96. As previously discussed, the maximum number of iterations can be set to any suitable value, such as 1, 2, 3, 4, 5, 6, 7, 8, or greater. In response to determining that the number of iterations is less than the maximum number of iterations, the working air source is controlled to increase the working air flow through the line (e.g., via increasing the speed of the blower), as shown in block 98. In some embodiments, the supplemental air source can be controlled to provide supplemental air during the supplemental air duration in response to an increase in the working air flow, as shown in block 100. Thus, the air flow through the line can be a combination of the supplemental air flow of the supplemental air and the increased working air flow. However, in some embodiments, supplemental air may not be provided in response to an increase in the working air flow.

[0050] The method then returns to block 94, where the air pressure difference is compared to a threshold (e.g., during the supplemental air duration). The process of increasing the working airflow and, in some embodiments, the process of providing supplemental air during the supplemental air duration, are iteratively repeated until the air pressure difference is less than or equal to the threshold or the maximum number of repetitions is reached. If the air pressure difference is less than or equal to the threshold, the method returns to block 82. Furthermore, if the maximum number of iterations is reached, the method proceeds to block 102, where the speed control system is controlled to reduce the ground speed of the agricultural system. In some embodiments, the maximum number of iterations may be once, such that only a single iteration of the process of increasing the working airflow and, in some embodiments, only a single iteration of the process of providing supplemental air during the supplemental air duration are performed.

[0051] As previously discussed, reducing the ground speed, as shown in box 102, reduces the flow rate of produce through the line. As a result, the working airflow (e.g., alone or in combination with supplemental airflow) may be sufficient to establish a pressure difference less than or equal to a threshold, thereby terminating any impending blockage. In some embodiments, the process of reducing the ground speed is performed iteratively. In such embodiments, after reducing the ground speed, the air pressure difference is compared to a threshold, as shown in box 104. If the air pressure difference is greater than the threshold, the process of reducing the ground speed is performed iteratively until the air pressure difference is less than or equal to the threshold. As previously discussed, in some embodiments, a delay (e.g., 10 seconds, 30 seconds, 1 minute, 2 minutes, etc.) may be implemented between reducing the ground speed and comparing the air pressure difference to the threshold. Therefore, the agricultural system can reach a steady state before the air pressure difference comparison. Furthermore, in some embodiments, in response to determining that the maximum number of ground speed reductions has been reached (e.g., the ground speed has decreased to below a rate sufficient for harvesting produce within a reasonable time), the process of reducing the ground speed terminates, and the user interface is controlled to present an indication of the status / condition to the operator. While the above describes iteratively reducing the ground speed of an agricultural system, in some embodiments, the ground speed may be reduced only once (e.g., the ground speed may be reduced without iteration).

[0052] In response to determining that the air pressure difference is less than or equal to a threshold, the method proceeds to block 106, where the air pressure difference is compared to a second threshold. The second threshold can be determined based on a target airflow rate for the flow rate of the agricultural product. For example, an airflow through a line at a target airflow rate can establish a target air pressure difference. In some embodiments, the second threshold can be set as the target air pressure difference. Therefore, an increase in the air pressure difference above the second threshold may indicate that the flow rate of the working airflow is not significantly greater than the target airflow rate. In response to determining that the air pressure difference is less than or equal to the second threshold, the working air source is controlled to reduce the working airflow (e.g., by reducing the speed of a blower), as shown in block 108. The process of reducing the working airflow can be performed iteratively until the air pressure difference is greater than the second threshold. Therefore, the working airflow can be reduced to approximately provide the target airflow rate for the flow rate of the agricultural product. However, in some embodiments, the process of iteratively reducing the working airflow can be omitted.

[0053] In each case where the air pressure difference is compared to a threshold (e.g., a first threshold or a second threshold), the air pressure difference can be determined based on the air pressure, as disclosed above. In some embodiments, after each adjustment of the working airflow and / or activation of the supplemental air source, a delay can be implemented before comparing the air pressure difference to the threshold (e.g., a first threshold or a second threshold) to allow the airflow to reach a substantially stable state before the comparison. The delay can be 1 second, 2 seconds, 5 seconds, 10 seconds, or any other suitable time period. Although the supplemental air source and speed control system are controlled based on the air pressure difference in the embodiments disclosed above, in some embodiments, only one of the supplemental air source or speed control system can be controlled. For example, in some embodiments, the steps of controlling the supplemental air source as shown in blocks 92 and 100 can be omitted, or the steps of controlling the speed control system as shown in block 102 can be omitted.

[0054] While only certain features have been illustrated and described herein, many modifications and variations will occur to those skilled in the art. Therefore, it should be understood that the appended claims are intended to cover all such modifications and variations falling within the true spirit of this disclosure.

[0055] The techniques proposed and claimed herein are referenced and applied to tangible objects and specific examples of practical nature that significantly improve upon the art and are therefore not abstract, intangible, or purely theoretical. Furthermore, if any claim appended to this specification contains one or more elements designated as “means for [performing] [function]…” or “steps for [performing] [function]…”, such elements should be interpreted in accordance with Section 112(f) of Title 35 of the United States Code. However, for any claim containing elements designated in any other manner, such elements should not be interpreted in accordance with Section 112(f) of Title 35 of the United States Code.

Claims

1. An air-assisted conveying system for an agricultural harvester, comprising: A controller including memory and a processor, wherein the controller is configured to: Receive a first sensor signal, the first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system; Receive a second sensor signal, the second sensor signal indicating a second air pressure at a second location within the line of the air-assisted delivery system; The air pressure difference is determined based on the first air pressure and the second air pressure; In response to determining that the air pressure difference is greater than a threshold: Control the supplemental air source to provide supplemental air to the line during the supplemental air duration; as well as In response to determining that the air pressure difference is greater than the threshold during the replenishment air duration, the working air source is controlled to iteratively increase the working air flow through the line during multiple iterations; The plurality of iterations includes an initial iteration and one or more subsequent iterations, and The working airflow in each of the one or more successive iterations is greater than the working airflow in the preceding iteration of the plurality of iterations. Specifically, controlling the working air source to iteratively increase the working air flow includes iteratively increasing the working air flow until the air pressure difference is less than or equal to the threshold or the maximum number of iterations is reached. The controller is configured to control the speed of the agricultural harvester by reducing its ground speed in response to reaching the maximum number of iterations.

2. The air-assisted delivery system according to claim 1, wherein, The controller is configured to control the supplemental air source to provide supplemental air during the supplemental air duration in response to each increase in the working air flow.

3. The air-assisted delivery system according to claim 1, wherein, Controlling the speed control system to reduce the ground speed includes iteratively reducing the ground speed until the air pressure difference is less than or equal to the threshold.

4. The air-assisted delivery system according to claim 1, wherein, After controlling the speed control system to reduce the ground speed, the controller is configured to iteratively reduce the working airflow until the air pressure difference is greater than a second threshold.

5. The air-assisted delivery system according to claim 1, wherein, The controller is configured to receive a third sensor signal indicating a third air pressure at a third location within the line of the air-assisted delivery system, and the controller is configured to determine the air pressure difference based on the first air pressure, the second air pressure, and the third air pressure.

6. A method for controlling an air-assisted conveying system for an agricultural harvester, comprising: A first sensor signal is received via a controller including a memory and a processor, the first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system of the agricultural harvester; The controller receives a second sensor signal, which indicates a second air pressure at a second location within the line of the air-assisted delivery system. The controller determines the air pressure difference based on the first air pressure and the second air pressure. In response to determining that the air pressure difference is greater than a threshold: The controller controls the supplemental air source to provide supplemental air to the line during the supplemental air duration; as well as In response to determining that the air pressure difference is greater than the threshold during the replenishment air duration, the controller controls the working air source to iteratively increase the working air flow through the line during multiple iterations; The plurality of iterations includes an initial iteration and one or more subsequent iterations, and The working airflow in each of the one or more successive iterations is greater than the working airflow in the preceding iteration of the plurality of iterations. Specifically, controlling the working air source to increase the working air flow includes iteratively increasing the working air flow until the air pressure difference is less than or equal to the threshold or the maximum number of iterations is reached. The speed control system is controlled by the controller to reduce the ground speed of the agricultural harvester in response to reaching the maximum number of iterations.

7. The method of claim 6, further comprising controlling the supplemental air source via the controller to provide the supplemental air during the supplemental air duration in response to each increase in the working air flow.

8. The method according to claim 6, wherein, Controlling the speed control system to reduce the ground speed includes iteratively reducing the ground speed until the air pressure difference is less than or equal to the threshold.

9. The method of claim 6, further comprising, after controlling the speed control system to reduce the ground speed, controlling the working air source via the controller to iteratively reduce the working airflow until the air pressure difference is greater than a second threshold.

10. The method of claim 6, further comprising receiving a third sensor signal via the controller, the third sensor signal indicating a third air pressure at a third location within the line of the air-assisted delivery system, wherein the air pressure difference is determined based on the first air pressure, the second air pressure, and the third air pressure.

11. An air-assisted conveying system for an agricultural harvester, comprising: A controller including memory and a processor, wherein the controller is configured to: Receive a first sensor signal, the first sensor signal indicating a first air pressure at a first location within the line of the air-assisted delivery system; Receive a second sensor signal, the second sensor signal indicating a second air pressure at a second location within the line of the air-assisted delivery system; The air pressure difference is determined based on the first air pressure and the second air pressure; In response to determining that the air pressure difference is greater than a threshold: The working air source is controlled to iteratively increase the working airflow through the line in multiple iterations. The multiple iterations include an initial iteration and one or more subsequent iterations. The working airflow in each of the one or more successive iterations is greater than the working airflow in the preceding iteration of the plurality of iterations, and The controller iteratively increases the working airflow until the air pressure difference is less than or equal to the threshold or the maximum number of iterations is reached; as well as In response to reaching the maximum number of iterations, the speed control system is controlled to reduce the ground speed of the agricultural harvester. Controlling the speed control system to reduce the ground speed includes iteratively reducing the ground speed until the air pressure difference is less than or equal to the threshold.

12. The air-assisted delivery system according to claim 11, wherein, After controlling the speed control system to reduce the ground speed, the controller is configured to iteratively reduce the working airflow until the air pressure difference is greater than a second threshold.

13. The air-assisted delivery system according to claim 11, wherein, The controller is configured to receive a third sensor signal indicating a third air pressure at a third location within the line of the air-assisted delivery system, and the controller is configured to determine the air pressure difference based on the first air pressure, the second air pressure, and the third air pressure.

14. The air-assisted delivery system of claim 11, comprising a display communicatively connected to the controller, wherein the controller is configured to control the display to present the air pressure difference, the output of the working air source, the ground speed of the agricultural harvester, or a combination thereof.

15. The air-assisted delivery system according to claim 11, comprising: A first air pressure sensor is configured to be fluidly connected to the circuit at the first location, wherein the first air pressure sensor is configured to output a first sensor signal; as well as A second air pressure sensor is configured to be fluidly connected to the circuit at the second location, wherein the second air pressure sensor is configured to output the second sensor signal.

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