Hook Loader Coupling Guidance System Using Offset Camera
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Solution Overview
Problem
Hook loader vehicles face challenges in aligning the moveable hook with the container's bar due to limited visibility and the need for precise vertical positioning, which can be time-consuming and require multiple attempts, especially when the container is on uneven ground or a trailer.
Innovation Solution
A guidance system using an image capturing device laterally offset from the hook, displaying a coupling alignment guide based on motion perspective lines and vanishing points to assist in aligning the hook with the container's bar, allowing for both lateral and vertical alignment assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driver uses wing mirrors to observe the position of the container, then lateral alignment can be achieved, but the operator cannot position the hook at the correct height due to limited visibility
Solution Approach 1:
The patent introduces an image capturing device as an intermediary between the operator and the hook/container alignment process. The device captures images from a lateral position and displays them on a screen within the driver's cab, allowing the operator to see the hook's position relative to the container without direct line of sight. This mediator enables both lateral and vertical alignment to be observed simultaneously.
Solution Approach 2:
The patent transitions from two-dimensional mirror reflection to a synthesized two-dimensional image representation that incorporates three-dimensional spatial relationships. By processing images from a laterally offset camera position, the system creates a view that displays both lateral distance and vertical height differences on a single display plane, enabling comprehensive alignment observation.
2Power
If the pump is driven by the engine, then the actuation system has sufficient power, but it is not possible to drive and move the arm/hook at the same time
Solution Approach 1:
The patent implements a dynamic control system that can switch between different operational modes. The engine can selectively drive either the pump or the arm actuation motor, but not both simultaneously. This dynamic allocation allows the system to adapt to different operational requirements - when positioning the arm, the engine drives the motor; when hydraulic actuation is needed, the engine drives the pump.
Solution Approach 2:
The system changes the operational parameter of the engine from continuous full-power output to variable power distribution. By controlling the engine to provide power to different components at different times, the system achieves both high power when needed and operational versatility through timed power allocation to either the hydraulic pump or the electric motor.
3Measurement precision
If multiple attempts are made to position the hook, then the correct height can be found, but the process becomes time-consuming
Solution Approach 1:
The patent implements a visual feedback system where the image capturing device continuously monitors the position of the hook relative to the container and displays this information on a screen in the driver's cab. The feedback shows lateral distance and vertical height differences, allowing the operator to make precise adjustments in a single attempt rather than through trial and error. The system provides real-time visual confirmation of alignment status.
Solution Approach 2:
The system performs preliminary positioning by allowing the operator to view the alignment status before final engagement. The image display shows the projected position of the hook and the container bar, enabling the operator to pre-adjust the arm position and vehicle location to achieve correct alignment before the actual coupling attempt, thereby eliminating the need for multiple attempts.
Data Source
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AI summary
According to an aspect there is provided a method for providing guidance for the alignment of a moveable first coupling of a vehicle and a second coupling of a body. The method comprises capturing an image which includes the second coupling using an image capturing device fixed with respect to the vehicle and laterally offset with respect to the first coupling; and displaying the image together with a coupling alignment guide which is aligned with a first point which is at a predefined position with respect to the image. There is also disclosed an associated guidance system.