Harvester Operating Mode Identification via Hydraulic Pressure Monitoring
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Solution Overview
Problem
Existing monitoring systems for harvesters provide limited and imprecise information on operating modes, failing to accurately distinguish between harvesting, maneuvering, transport, and waiting modes, leading to inefficiencies in crop harvesting operations.
Innovation Solution
A method and control system that monitors hydraulic pressures in harvesting devices to identify operating modes, using pressure limits and current operating pressures to determine whether the harvester is in harvesting, maneuvering, transport, or waiting modes, and updates these limits continuously to account for changes in hydraulic system conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing monitoring systems only assess the state of a harvesting switch, then the system complexity is low, but the measurement precision of operating mode identification is limited and imprecise
Solution Approach 1:
The patent segments the monitoring system into multiple independent sensor channels, each monitoring specific parameters (hydraulic pressure, flow rate, engine speed, ground speed) for different harvesting devices. This segmentation allows precise identification of operating modes through coordinated data from multiple sensors without creating a monolithic complex system.
Solution Approach 2:
The monitoring system uses multiple sensors that can serve multiple functions. For example, hydraulic pressure sensors monitor both individual device operation and overall system status, while ground speed data contributes to determining both transport mode and harvesting mode. This multi-functionality improves measurement precision without proportionally increasing system complexity.
2Measurement precision
If hydraulic pressure monitoring is continuously updated with multiple thresholds, then the operating mode identification accuracy is improved, but the computational complexity and processing time increase
Solution Approach 1:
The system dynamically updates pressure limits based on current operating conditions rather than using fixed thresholds. The controller continuously adjusts reference pressure values for each harvesting device based on real-time hydraulic system state, enabling accurate operating mode identification across varying conditions without requiring excessively complex computational models.
Solution Approach 2:
The monitoring system implements feedback mechanisms where pressure measurements from hydraulic circuits are continuously compared against updated reference limits, and the results feed back into adjusting the pressure limits for subsequent comparisons. This feedback loop refines operating mode detection accuracy while maintaining manageable computational complexity through iterative adjustment rather than complex algorithms.
3Reliability
If multiple hydraulic circuits are monitored simultaneously, then the reliability of operating mode determination is improved, but the device complexity and data processing requirements increase
Solution Approach 1:
The system monitors multiple hydraulic circuits independently, with each circuit associated with specific harvesting devices. By segmenting the monitoring into circuit-specific channels with dedicated pressure sensors and evaluation logic, the system achieves reliable multi-device monitoring without creating an intractably complex integrated system.
Solution Approach 2:
The system pre-establishes pressure limit thresholds for each hydraulic circuit before operation begins or before mode transitions occur. This preliminary setup of reference values for multiple circuits allows the system to reliably determine operating modes through straightforward comparison operations rather than requiring complex real-time calculations across all circuits simultaneously.
Data Source
AI summary
A method and control system are disclosed for monitoring operating modes of a harvester. A harvester may include one or more harvesting devices driven by one or more hydraulic circuits. A lower pressure limit and a current operating pressure may be determined for a hydraulic circuit of a harvesting device. The determined pressure limit and operating pressure may be compared, and a current operating mode for the harvester identified accordingly. The operating mode may include at least one of a waiting mode, a transport mode, a maneuvering mode, and a harvesting mode.