Loading Machine Earth Pressure Calculation from Traction and Load Height
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Solution Overview
Problem
Existing loading machines lack the ability to adjust the weight of excavated objects optimally loaded onto haul vehicles, necessitating a method to recognize the physical properties of the object to be excavated, particularly the earth pressure coefficient.
Innovation Solution
A control system for loading machines that calculates the earth pressure coefficient based on traction force and load height using sensors and a controller to optimize loading efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the loading machine uses conventional excavation methods without physical property detection, then the operation is simple, but the loading capacity cannot be optimized
Solution Approach 1:
The patent replaces direct mechanical measurement of earth pressure with a calculation system that uses traction force sensors and load height detection to compute the earth pressure coefficient, enabling optimized loading capacity determination without complex mechanical pressure measurement devices
Solution Approach 2:
The patent introduces an intermediary calculation model that relates traction force, load height, and earth pressure coefficient through mathematical relationships, allowing the system to infer physical properties without direct measurement of earth pressure
2Measurement precision
If the loading machine calculates earth pressure coefficient using traction force and load height, then the loading capacity can be optimized, but the measurement and calculation system becomes more complex
Solution Approach 1:
The patent substitutes direct mechanical earth pressure measurement with a calculation approach using readily available sensor data (traction force and load height), achieving precise earth pressure coefficient determination through mathematical modeling rather than complex mechanical sensors
Solution Approach 2:
The system uses its own existing sensors (traction force sensors already present for operation control, load height detection from boom angle sensors) to calculate the earth pressure coefficient, eliminating the need for separate dedicated measurement devices
3Productivity
If the loading machine adjusts loading capacity based on calculated earth pressure coefficient, then the loading efficiency improves, but the control system becomes more complex
Solution Approach 1:
The patent implements a feedback control loop where the calculated earth pressure coefficient is used to adjust the loading capacity, and the adjusted loading is fed back to verify the calculation accuracy, enabling continuous optimization of loading efficiency
Solution Approach 2:
The system dynamically adjusts the loading capacity based on real-time calculation of the earth pressure coefficient, allowing the loading machine to adapt to varying soil conditions and optimize performance for each excavation task
Data Source
AI summary
A control system for controlling a loading machine, which includes working equipment having a bucket, includes a controller. The controller calculates a traction force of the loading machine during excavation work of excavating an object to be excavated with the bucket. The controller calculates a load height representing a height of the object to be excavated inside the bucket during the excavation work. The controller calculates an earth pressure coefficient of the object to be excavated based on the traction force and the load height.