Direct-Infeed Agricultural Spraying for Time-Lag Compensation
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Solution Overview
Problem
Agricultural spraying devices with direct infeed systems experience a time lag between changing the active substance concentration and the actual discharge of the spray fluid due to the length of the line between the infeed point and the spray nozzles, leading to inconsistent application.
Innovation Solution
A control unit automatically adjusts the active substance concentration of the spray fluid before reaching an area-internal application limit, ensuring the changed concentration is present at the application elements when needed by considering factors like line properties, driving speed, and application maps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the line system length is reduced, then the time lag between infeed change and spray fluid discharge is reduced, but the system complexity and installation difficulty increase
Solution Approach 1:
The control unit anticipates the time lag by automatically initiating the active substance concentration change before the application elements reach the area-internal application limit. This preliminary action ensures the new concentration is already present at the spray nozzles when needed, eliminating the time lag effect without reducing line system length.
2Manufacturing precision
If the active substance concentration is changed frequently, then the application precision is improved, but the time lag causes application inconsistency
Solution Approach 1:
The control unit continuously monitors the current position of the application elements relative to the area-internal application limits and automatically adjusts the active substance concentration in advance. This feedback mechanism ensures consistent application by compensating for the time lag through predictive control based on real-time position data.
3Productivity
If the feed pump doses active substance in advance, then the application timing is improved, but the system requires more complex control
Solution Approach 1:
The control unit automatically manages the entire concentration change process without manual intervention. It calculates the required timing based on line properties and driving speed, controls the feed pump to dose the correct amount of active substance in advance, and ensures the new concentration is present at the spray nozzles at the correct moment. This self-service approach improves timing accuracy while managing complexity through automation.
Data Source
AI summary
A method for operating an agricultural spraying device having a direct infeed system, comprising the following steps: feeding an active substance into a line system of the agricultural spraying device, said line system being connected to application elements and conducting a carrier fluid, by means of the direct infeed system in order to generate a spray fluid containing the active substance and the carrier fluid, wherein the feeding in of the active substance takes place at an infeed point of the line system; and changing the active substance concentration of the spray fluid by adjusting the active substance infeed and/or by adjusting the volume flow of the carrier fluid at the infeed point.