Agricultural Sprayer Direct Feed Control for Concentration Precision
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Solution Overview
Problem
Agricultural sprayers with direct feed systems face delays in achieving intended active ingredient concentrations at spray nozzles and risk local excessive application when using premixed spray mixtures, requiring movement to prevent application issues.
Innovation Solution
The control device initializes dispensing elements in a closed state during active ingredient feed, ensuring internal spray liquid replaces carrier liquid without release, and uses circulation and return systems to manage carrier liquid, preventing contamination and excessive application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the direct feed system is activated to produce spray liquid internally, then the intended active ingredient concentration is established, but there is a time delay before the spray liquid reaches all spray nozzles
Solution Approach 1:
The application elements are closed before the direct feed system is activated, preparing the system in advance to receive and retain the internally produced spray liquid without releasing carrier liquid, thus eliminating delivery delay while maintaining concentration precision
2Productivity
If the carrier liquid is a premixed spray mixture and the direct injection system is activated, then internal spray liquid production begins, but localized over-application occurs due to residual carrier liquid in the piping system
Solution Approach 1:
The application elements are closed in advance before direct injection activation, preventing residual carrier liquid from being applied to the agricultural area. This preliminary closure ensures that only internally produced spray liquid is applied, eliminating localized over-application and maintaining uniform distribution precision
Solution Approach 2:
By closing the application elements before activation, the system preemptively prevents the harmful effect of carrier liquid over-application, counteracting the problem before it occurs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables rapid and uniform active ingredient concentration build-up without local excessive application, ensuring efficient and controlled distribution of spray liquids across agricultural areas.
Implementation Method 1
the spray liquid to be applied is produced internally by adding an active ingredient to a carrier liquid
Implementation Method 2
a circulation system for conveying the carrier liquid is provided
Implementation Method 3
a return system for returning carrier liquid from the spray system to the storage tank
Data Source
Figure 1
AI summary
The invention relates to a method for operating an agricultural sprayer having a direct feed system (12), comprising the steps of: feeding an active ingredient (W) into a carrier liquid (T) at at least one feed point (28) of a piping system of the agricultural sprayer for the internal production of a spray liquid to be applied, and conveying the internally produced spray liquid to several application elements (34a-34e) of the agricultural sprayer, by means of which the internally produced spray liquid can be applied to an agricultural area, wherein a control device of the agricultural sprayer causes the application elements (34a-34e) to be in a closed state at the start of an active ingredient feed into the carrier liquid (T) at least until the internally produced spray liquid is present at the application elements (34a-34e).