Work Vehicle Bucket Calibration Using Horizontal State Detection
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Solution Overview
Problem
In work vehicles with tilting buckets, accurately calibrating data for predicting operation speed is challenging due to the influence of gravity, which affects the accuracy of speed limit calculations during tilting operations.
Innovation Solution
A work vehicle configuration that includes a bucket, an electromagnetic proportional control valve, sensors, and a controller for detecting the horizontal state of the bucket, allowing for adjustments in current output to the valve and calibration of data without gravity's influence, using sensors to measure pilot pressure and operation speed, and specifying current values for accurate calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed during tilting operation, then calibration data can be obtained, but gravity affects the accuracy of operation speed prediction
Solution Approach 1:
The system performs preliminary detection of the horizontal state using the tilt sensor before initiating calibration. By ensuring the bucket is horizontal before calibration starts, the system eliminates gravity's influence on the calibration data, thereby improving measurement precision without requiring complex compensation mechanisms during the calibration process.
2Measurement precision
If the bucket is kept horizontal during calibration, then gravity influence is eliminated, but additional detection and control steps are required
Solution Approach 1:
The tilt sensor automatically detects when the bucket is in the horizontal state, and the control unit automatically manages the calibration timing based on this detection. This self-service mechanism eliminates the need for manual intervention to ensure horizontal positioning, reducing procedural complexity while maintaining high calibration accuracy.
3Measurement precision
If current value is adjusted after horizontal state detection, then calibration is performed without gravity influence, but calibration timing control is required
Solution Approach 1:
The system uses feedback from the tilt sensor to continuously monitor the bucket's attitude. When the horizontal state is detected, the control unit receives this feedback signal and automatically adjusts the current value to the electromagnetic proportional control valve at the appropriate timing. This closed-loop feedback mechanism ensures precise calibration timing control while maintaining speed prediction accuracy.
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 accurate calibration of data for predicting operation speed during tilting operations, reducing the impact of gravity and ensuring precise speed control, thereby improving operational efficiency and accuracy.
Implementation Method 1
an electromagnetic proportional control valve generating a pilot pressure guided to the valve
Implementation Method 2
a valve adjusting a flow rate of a hydraulic oil having the bucket perform a tilting operation
Data Source
AI summary
A work vehicle includes a bucket which can perform a tilting operation with a hydraulic oil, a valve adjusting a flow rate of the hydraulic oil having the bucket perform the tilting operation, an electromagnetic proportional control valve generating a pilot pressure guided to the valve, a controller outputting a current to the electromagnetic proportional control valve, and a first sensor for detecting the tilting operation. The controller detects a horizontal state of the bucket based on an output from the first sensor. The controller adjusts a value for the current output to the electromagnetic proportional control valve after the horizontal state of the bucket is detected, and starts calibration of data for predicting an operation speed of the bucket in the tilting operation.