Bale Opener Force Calibration via Sensor Feedback
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Solution Overview
Problem
The existing methods for calibrating the contact force of bale openers are prone to measurement inaccuracies due to disruptive influences like height changes, friction, vibrations, and signal distortions, leading to incorrect force readings and potential misalignment of the take-off element, which can result in the element being 'in the air' instead of gripping the bale.
Innovation Solution
A method that involves specifying upper and lower bearing forces, using a force sensor to measure and adjust for signal distortions, and controlling the take-off element's movement based on calibrated contact forces to ensure stable and reliable scanning, with features like relieving the removal element and monitoring its position to prevent over-lowering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the take-off element is lowered to achieve contact force measurement, then the contact force can be measured, but the element may be torn out of the rails due to over-lowering
Solution Approach 1:
The patent applies preliminary action by establishing safety limits and monitoring mechanisms before the actual contact force measurement begins. The system pre-defines the relationship between longitudinal position and permissible contact force, and continuously monitors during operation to prevent the take-off element from being lowered too far, thus avoiding being torn out of the rails while still enabling accurate contact force measurement.
2Productivity
If the removal element is moved to scan the bale group, then the scanning process can be performed, but measurement inaccuracies occur due to height changes, friction, and vibrations
Solution Approach 1:
The patent implements feedback by continuously monitoring the longitudinal position of the removal element and using this information to dynamically adjust or interpret contact force measurements. The control unit receives both position and contact force data, allowing it to compensate for measurement inaccuracies caused by height changes, friction, and vibrations during the scanning process, thereby maintaining both productivity and measurement precision.
3Productivity
If the take-off element is positioned to grip the bale, then material removal can occur, but incorrect force readings may cause the element to be 'in the air' instead of gripping the bale
Solution Approach 1:
The control unit uses feedback from both the contact force sensor and the longitudinal position data to determine the actual engagement state of the take-off element with the bale. By correlating position and force information, the system can distinguish between genuine 'in the air' conditions and measurement errors, ensuring that material removal operations are triggered only when proper engagement is confirmed, thus maintaining productivity while compensating for force reading inaccuracies.
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 approach ensures accurate and reliable calibration of the contact force, preventing the take-off element from being torn out of the rails and ensuring secure engagement with the bale group, thereby stabilizing the scanning process and improving material removal efficiency.
Implementation Method 1
a force sensor (12) which, during longitudinal movement of the removal element (3) along the bale group (4), continuously measures the force with which the removal element (3) rests on the bale group (4)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for calibrating the contact force of a removal element (3) of a bale opener (1) prior to the removal process of a bale group (4), and to a corresponding bale opener (1). The removal element (3) is calibrated in such a way as to exclude signal distortions and to ensure stable and reliable scanning of the bale groups (4) by means of contact force measurement. During the longitudinal movement of the removal element (3) along the bale group (4), the force is continuously measured with the calibrated force sensor (12), and a downward movement of the removal element (3) occurs when a lower contact force is reached, and an upward movement occurs when an upper contact force is reached.