Payload Calculation System with Center of Gravity Compensation
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Solution Overview
Problem
Existing payload calculation systems for machines with work implement linkage members face inaccuracies due to changes in the center of gravity, which can lead to overloading and increased maintenance costs or delays.
Innovation Solution
A payload calculation system that includes state sensors to measure the state of linkage members and a processing device to account for changes in the center of gravity, allowing for accurate mass determination of payloads moved by the work implement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the center of gravity of linkage members is assumed fixed in prior art payload calculation systems, then the system complexity is reduced and calculations are simpler, but measurement precision deteriorates due to inaccuracies in payload mass determination
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a static assumption of fixed center of gravity to a dynamic model where the center of gravity of linkage members is calculated as a function of their current positions. The processing device continuously updates the center of gravity locations based on real-time sensor data regarding linkage member positions, thereby improving payload mass determination accuracy without requiring physical repositioning of components.
Solution Approach 2:
The patent implements parameter changes by modifying the calculation parameters from fixed center of gravity values to variable parameters that change with linkage member positions. The system calculates center of gravity locations as dynamic parameters based on current linkage configuration, allowing accurate payload measurement across different operating conditions while maintaining the same sensor and processor hardware.
2Productivity
If payload calculation systems use dynamic measurements while the machine and work implement are in motion, then productivity is improved, but measurement precision deteriorates due to changes in the location of the center of mass of linkage members
Solution Approach 1:
The patent applies feedback by using sensors to continuously monitor the positions of linkage members during motion and feeding this information back to the processing device. The processing device then recalculates the center of gravity locations based on the current positions, creating a closed-loop system that maintains measurement accuracy despite dynamic changes in the work implement configuration during operation.
Solution Approach 2:
The system embraces the dynamic nature of the work implement during operation by calculating center of gravity positions as functions of current linkage member positions rather than assuming fixed positions. This dynamic calculation approach allows accurate payload measurement while the machine and work implement are in motion, thereby maintaining productivity without sacrificing measurement precision.
Data Source
AI summary
The present disclosure is directed to a payload calculation system for use with a work implement having at least two linkage members. The payload calculation system may have at least one state sensor configured to measure a state of the at least two linkage members. The payload calculation system may also have a processing device in communication with the at least one state sensor. The processing device may account for changes in a center of gravity of each of the at least two linkage members. The processing device may also be configured to use the at least one state sensor to determine a mass of a payload moved by the work implement.