Grapple Torque-Based Weight Calculation for Long Timber Loading
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Solution Overview
Problem
Existing work machines face challenges in accurately calculating the weight of long materials such as round timber during gripping and carrying operations, which is crucial for efficient loading onto dump trucks.
Innovation Solution
A work machine equipped with a grapple and processing circuitry that calculates the weight of carried materials based on torque, utilizing sensors and controllers to determine the weight of the material being gripped by the grapple.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no weight calculation system is installed, then the device complexity is reduced, but the measurement precision of carried-material weight is insufficient
Solution Approach 1:
The work machine uses its own hydraulic system and existing sensors to calculate the weight of carried materials. The control device computes weight based on hydraulic pressure data and operational parameters already available in the machine's control system, eliminating the need for separate external weighing systems.
Solution Approach 2:
The patent replaces traditional mechanical weighing systems with a computational approach using hydraulic pressure measurements and control algorithms. Instead of physical load cells or scales, the system calculates weight by measuring hydraulic pressure required to operate the attachment and applying mathematical models.
2Measurement precision
If simple torque-based weight calculation is used, then the device complexity is reduced, but the measurement precision is insufficient due to unaccounted inertia and centrifugal forces
Solution Approach 1:
The control device continuously monitors hydraulic pressure, attachment position, and operational parameters to dynamically calculate and adjust weight measurements. The system uses feedback from multiple sensors to compensate for varying operational conditions including acceleration and rotation of the attachment.
Solution Approach 2:
The patent accounts for changes in operational parameters such as attachment position, speed, and acceleration to accurately calculate weight. The system adjusts calculations based on real-time parameter changes to compensate for inertia and centrifugal forces affecting the measurement.
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
Enables precise weight calculation of carried materials, ensuring safe and efficient loading by preventing overloading, thereby optimizing the use of dump trucks.
Implementation Method 1
a hydraulic pump for discharging hydraulic oil by the power of the engine
Implementation Method 2
processing circuitry, and a memory storing computer-readable instructions, which when executed, cause the processing circuitry to calculate a weight of the carried-material, based on a torque for rotating the attachment
Data Source
AI summary
A work machine includes an attachment rotatably attached to an upper turning body; a gripping part rotatably attached to the attachment, the gripping part gripping a long carried-material; and processing circuitry, and a memory storing computer-readable instructions, which when executed, cause the processing circuitry to calculate a weight of the carried-material, based on a torque for rotating the attachment.