Agricultural Baler Wrap Detection Controller
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Solution Overview
Problem
Conventional agricultural balers often waste wrapping material due to excessive wrapping, which can lead to inefficient operation and material waste, as they lack effective control over the wrapping process, particularly in cases where the knife assembly fails to fully cut the wrapping material.
Innovation Solution
A wrapping system with a controller that monitors the length of wrapping material drawn from a roll, outputs a cut signal when a defined length is reached, and detects excessive wrapping by determining the length after cutting, preventing further wrapping when excess material is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wrapping material is continuously applied to the bale without precise control, then the bale is adequately protected and maintained, but excessive wrapping material is wasted and operational time is reduced
Solution Approach 1:
The system uses a sensor to detect when the knife assembly has cut the wrapping material and feeds this information back to the controller. The controller then stops the material roll from continuing to supply wrapping material, preventing excessive wrapping. This feedback mechanism ensures that wrapping material is applied only when needed and stops automatically after cutting, eliminating waste while maintaining adequate bale protection.
Solution Approach 2:
The system performs a preliminary cutting action using the knife assembly to sever the wrapping material at the appropriate length. By establishing this cutting point beforehand and using it as a reference for when to stop material supply, the system ensures precise control over wrapping material application, preventing both insufficient and excessive wrapping.
2Ease of manufacture
If the knife assembly fails to fully cut the wrapping material, then continuous wrapping occurs, but this leads to excessive material consumption and reduced productivity
Solution Approach 1:
The sensor provides real-time feedback to the controller about the cutting status by detecting when the knife assembly has successfully severed the wrapping material. When cutting fails to occur, the sensor continues to detect material being drawn, and the controller responds by stopping the material roll, preventing continuous excessive wrapping and allowing the operator to address the cutting issue.
Solution Approach 2:
The system automatically monitors and self-regulates the wrapping process without continuous operator intervention. The sensor and controller work together to automatically stop material supply when cutting is detected or when excessive drawing occurs, enabling the baler to self-correct wrapping issues and maintain productivity.
3Device complexity
If no monitoring system is used for wrapping material length, then the system is simple, but wrapping material waste occurs and operational efficiency decreases
Solution Approach 1:
A sensor is introduced to monitor the wrapping material drawing process and provide feedback to the controller. This relatively simple addition enables the system to detect when material should be cut and when excessive wrapping is occurring, automatically preventing material waste while maintaining minimal added complexity to the overall wrapping system.
Solution Approach 2:
The patent replaces manual monitoring and control of wrapping material length with an automated sensor-based detection system. This substitution eliminates the need for operator intervention to monitor material consumption, automatically prevents waste through electronic control of the material roll, and improves operational efficiency with minimal added mechanical complexity.
Data Source
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AI summary
Wrapping system (100) for an agricultural baler (10) includes: material roll (13) configured to hold a roll of wrapping material; and knife assembly (12) including a movable knife (60) configured to cut wrapping material that comes off the material roll. A sensor (110) is associated with the material roll and configured to output a drawn material signal indicative of wrapping material being drawn from the material roll. A controller (510, 520) is operatively coupled to knife assembly and sensor. The controller is configured to: receive the drawn material signal; determine a length of wrapping material that is drawn from the material roll; output a cut signal to the knife assembly when the drawn length of wrapping material reaches a defined length; determine a length of wrapping material that is drawn from the material roll after outputting the cut signal; and output an excessive wrap signal when the length of wrapping material drawn after outputting the cut signal exceeds a threshold length.