Agricultural Sprayer Pump Control Using Nozzle Opening Times
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Solution Overview
Problem
Existing agricultural spraying devices lack optimal control and regulation of the conveying device's operating parameters, such as rotational speed, which are typically controlled based on central control valves and travel speed, leading to inefficiencies.
Innovation Solution
Control and regulate the conveying device's operating parameters, particularly rotational speed, based on the adjustable opening times and duty cycles of dispensing elements, using electronic functions and characteristic maps, and consider delivery quantity and pressure, with optional feedback from measuring devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conveying device's operating parameter (rotational speed) is controlled based on central control valves and travel speed, then the control system is simple, but the control precision and adaptability are insufficient
Solution Approach 1:
The patent implements a feedback control system where the actual flow rate and actual delivery pressure are detected and fed back to the control unit. The control unit compares these actual values with target values and adjusts the conveying device's rotational speed accordingly, creating a closed-loop control system that continuously optimizes performance based on real-time measurements.
Solution Approach 2:
The patent replaces manual or mechanical control methods with an electronic control system. The control unit uses electronic sensors to detect flow rate and pressure, processes this data electronically, and actuates the conveying device through electronic control signals, substituting mechanical control mechanisms with electronic automation for improved precision.
2Adaptability or versatility
If the conveying device operates at fixed speed, then the device complexity is low, but the adaptability to different application requirements is poor
Solution Approach 1:
The patent transforms the conveying device from a fixed-speed operation to a dynamically adjustable speed system. The rotational speed of the conveying device is continuously variable and adapts in real-time based on detected flow rate and pressure conditions, allowing the system to optimize performance for different application requirements dynamically during operation.
Solution Approach 2:
The patent changes the operating parameters of the conveying device dynamically. The rotational speed parameter is adjusted based on the detected actual flow rate and delivery pressure, allowing the system to adapt to varying application requirements by modifying key operational parameters in real-time rather than operating at fixed settings.
3Loss of energy
If the conveying device is not optimally controlled, then the device complexity is low, but energy consumption and wear increase
Solution Approach 1:
The feedback control system detects actual flow rate and pressure, compares them with target values, and adjusts the conveying device's rotational speed to minimize deviations. This continuous optimization ensures the system operates at peak efficiency, reducing energy waste and minimizing wear on components by avoiding operation outside optimal parameters.
Data Source
Figure 1
AI summary
A method for distributing spray (11) onto an agricultural area by means of an agricultural spray device (100), in which the spray (11) is conveyed by means of at least one conveying device (20) along at least one liquid circuit (10) of the spray device (100), wherein a conveying quantity and/or conveying pressure, with which the spray (11) is conveyed at least in portions along the liquid circuit (10), is set on the basis of at least one operating parameter which can be set on the conveying device (20), wherein the spray (11) is distributed onto the agricultural area via a plurality of distributing elements (50A-50L) which are arranged along the liquid circuit (10) and are each configured to set a distributing quantity of the spray (11) on the basis of the opening times which can be set at the distributing elements (50A-50L). In order to design a method for distributing spray (11) in such a way that the machine-internal conveying of the spray (11) and/or the operation of the at least one conveying device (20) are/is improved further, it is provided that the at least one operating parameter of the conveying device (20) is open-loop and/or closed-loop controlled on the basis of the adjustable opening times of the distributing elements (50A-50L).