Work Machine Stabilizer Pair Control for Automatic Levelling
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Solution Overview
Problem
Existing work machines with stabilizers require skilled operators to manually adjust stabilizers individually to level the machine on uneven ground, which can be challenging and time-consuming.
Innovation Solution
A method and device using a first, second, third, and fourth adjustable stabilizers with a tilt sensor to automatically adjust the stabilizer pairs to align the work machine's plane with a target plane, ensuring parallel alignment even on non-level ground, by extending and retracting stabilizers based on sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual levelling control is used, then the operator can adjust the work tool position, but the levelling precision deteriorates due to operator fatigue and inexperience
Solution Approach 1:
The patent replaces manual mechanical levelling control with an automated electronic control system. Sensors detect the actual position of the work tool relative to the design line, and an electronic control unit automatically adjusts the work tool position, eliminating reliance on operator skill and experience for achieving precise levelling.
Solution Approach 2:
The system enables self-service levelling by automatically detecting position deviations and adjusting the work tool without continuous manual intervention. The automated feedback loop allows the system to self-correct levelling errors, reducing operator fatigue and maintaining consistent precision throughout operation.
2Measurement precision
If automated levelling control is implemented, then levelling precision is improved, but system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The control system is integrated into the existing work machine framework, allowing the same electronic control unit to manage multiple functions including levelling control, position monitoring, and actuator coordination. This multi-functionality reduces overall system complexity compared to dedicated separate systems.
Solution Approach 2:
The patent introduces an electronic control unit as an intermediary between sensors and actuators, simplifying the control architecture. This intermediary processes sensor data and generates appropriate control signals, reducing the complexity of direct sensor-actuator connections and enabling modular system design.
3Productivity
If the work machine operates on uneven terrain, then mobility is maintained, but levelling accuracy deteriorates due to machine body movement
Solution Approach 1:
The system dynamically compensates for machine body movements by continuously monitoring the position of the work tool relative to the design line and adjusting in real-time. This dynamic adaptation allows the system to maintain levelling accuracy even when the machine operates on uneven terrain or experiences body movement during operation.
Solution Approach 2:
The patent implements a feedback mechanism where sensors continuously detect the actual work tool position and feed this information back to the electronic control unit. The control unit compares the actual position with the desired design line position and automatically adjusts the work tool to maintain accuracy, compensating for terrain variations and machine movement.
Data Source
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AI summary
A method of adjusting a first plane of a work machine comprising first, second, third and fourth adjustable stabilisers that are each extendable between a minimum extension and a maximum extension. A difference in length between the minimum extension and the maximum extension is the same for each adjustable stabiliser. The first, second, third and fourth adjustable stabilisers are configured to support the work machine when a distal end of each adjustable stabiliser is in contact with a ground surface. A first stabiliser pair comprises the first adjustable stabiliser and the second adjustable stabiliser. A second stabiliser pair comprises the second adjustable stabiliser and the third adjustable stabiliser. The method comprises: a. extending the first, second, third and fourth adjustable stabilisers to a first configuration, wherein in the first configuration each adjustable stabiliser is at a calibration extension and the first plane is parallel to a reference plane defined by points of contact of the distal ends of the first, second, third and fourth adjustable stabilisers with the ground surface; b. adjusting the first stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a second configuration, wherein in the second configuration: either the tilt sensor indicates that the first plane is parallel to a first axis of a target plane; or the first adjustable stabiliser and the second adjustable stabiliser have reached the maximum extension; c. adjusting the second stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a third configuration, wherein in the third configuration: either the tilt sensor indicates that the first plane is parallel to a second axis of the target plane; or the second adjustable stabiliser and the third adjustable stabiliser have reached maximum extension.