Grader Blade Control via Motion Trajectory Library
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Solution Overview
Problem
Existing grader technologies rely on operator experience for slope adjustments, leading to low efficiency and accuracy, and struggle to adapt to multiple operation conditions, resulting in poor slope formation and prolonged engineering progress.
Innovation Solution
A grader system with a blade mechanism, adjusting mechanism, position detecting mechanism, and motion trajectory library, controlled by a controller that automatically adjusts the blade's position and angle based on detected slope parameters and operation conditions, using electro-hydraulic proportional valves and sensors to implement precise adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual slope adjustment by operator is used, then the system is simple to operate, but the slope formation accuracy and adjustment efficiency are low
Solution Approach 1:
The blade position detecting mechanism detects the actual blade position and feeds back this information to the controller, which compares it with the target position and automatically adjusts the blade via the blade adjusting mechanism. This closed-loop feedback control ensures high slope formation accuracy while eliminating manual intervention.
Solution Approach 2:
The system performs self-adjustment of the blade position based on pre-stored motion functions in the motion trajectory library. The controller automatically calls the appropriate motion function and controls the adjusting means without requiring operator intervention, achieving both high precision and operational simplicity.
2Adaptability or versatility
If fixed blade adjustment method is used, then the control system is simple, but the adaptability to different operation conditions is poor
Solution Approach 1:
The system dynamically adapts to different operation conditions by switching between pre-stored motion functions in the motion trajectory library. Each motion function corresponds to a specific operation condition (e.g., scraping slope, scraping groove), allowing the blade adjusting mechanism to automatically adapt its adjustment parameters and sequence based on the current operational requirements.
Solution Approach 2:
Motion functions for various operation conditions are pre-calculated and stored in the motion trajectory library before operation. When a specific operation condition is detected, the controller simply calls the corresponding pre-prepared motion function, enabling rapid adaptation without complex real-time calculations or manual reconfiguration.
3Productivity
If automated blade adjustment is implemented, then the adjustment efficiency is improved, but the device complexity increases
Solution Approach 1:
The blade adjusting mechanism is divided into multiple independent adjusting means, each controlling a specific degree of freedom (pitch, side-swing, rotation, sliding). This segmentation allows each component to be controlled independently by dedicated electro-hydraulic proportional valves, simplifying the control architecture while achieving complex multi-dimensional blade positioning for high adjustment efficiency.
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
The system enables efficient and precise slope adjustments across multiple operation conditions, reducing manual intervention and improving slope formation accuracy and efficiency.
Implementation Method 1
a left lift cylinder and a right lift cylinder vertically arranged on left and right sides of the body frame respectively, both connected between the body frame and the second end of the swing frame drive the swing frame to pitch relative to the body frame
Implementation Method 2
a tilt cylinder, connected between the second end of the swing frame and the body frame drive the swing frame to side-swing
Implementation Method 3
a rotary motor, connected between the second end of the swing frame and the rotary support drive the rotary support to rotate relative to the second end of the swing frame
Implementation Method 4
an offset cylinder, connected between the blade and the rotary support drive the blade to slide relative to the rotary support
Implementation Method 5
an angle cylinder connected between the rotary support and the blade drive the blade to rotate relative to the rotary support
Data Source
AI summary
A grader and a blade control method wherein the grader includes: a blade mechanism including a blade; a blade adjusting mechanism including a plurality of adjusting means respectively corresponding to at least two degrees of freedom of the blade, and configured to adjust a spatial position and/or angle of the blade; a blade position detecting mechanism configured to detect a slope parameter for characterizing a spatial position of the blade; a motion trajectory library configured to store motion functions of the plurality of adjusting means respectively when different operation conditions and/or different grades are switched; a controller configured to call a corresponding motion function in the motion trajectory library according to a set operation condition and a required slope, and control at least one of the plurality of adjusting means according to a position parameter of the blade and the motion function.