Baler Drive Load Estimation via Plunger Position
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Solution Overview
Problem
Agricultural balers face high loads on their drive system components, leading to breakdowns and premature aging due to the complexity and expense of existing load measurement systems, which fail to effectively manage torque and prevent gearbox overloads.
Innovation Solution
An electronic system that estimates load on the baler's drive system by combining load and position data from sensors, allowing for real-time monitoring and control of the plunger's movement, thereby preventing overloads and extending component lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load sensors and strain gauges are used to measure loads on drive system elements, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses an intermediary computational approach by combining plunger load measurements with drive system position data to calculate equivalent drive element loads. This mathematical intermediary method avoids direct installation of complex load sensors on drive shafts and gears,而是 using readily available sensor data processed through calculation algorithms to derive the required load information.
Solution Approach 2:
The invention replaces direct mechanical load measurement systems (strain gauges, load cells on drive components) with a computational model that uses existing sensor data. The mechanical measurement system is substituted by an information processing system that calculates equivalent loads based on plunger measurements and positional relationships, thereby reducing hardware complexity.
2Reliability
If direct load measurement on drive elements is implemented, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent employs an intermediary calculation method that uses plunger load measurements combined with drive element position data to determine equivalent loads on drive components. This approach provides reliable protection without requiring direct instrumentation of drive elements, significantly simplifying installation and manufacturing while maintaining protective functionality.
3Reliability
If friction control elements are adjusted to regulate maximum torque, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system that continuously monitors calculated drive element loads and compares them against predetermined threshold values. When thresholds are exceeded, the system automatically adjusts friction control elements to regulate torque, creating a closed-loop feedback mechanism that improves reliability while using simple threshold-based control logic to minimize complexity.
Data Source
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AI summary
The invention relates to determining the load on an element of the drive system (401) of a plunger (410) of an agricultural baler (400), and to use thereof for controlling such balers (400). A value (477) representative of or an estimate of the load on an element of the drive system (401) of the plunger (410) is determined, based on combining an obtained value (476) representative of the load on the plunger (410) with obtained position information (475) of the drive element relative to the plunger (410).