6-DOF Crane Grip Control for Intuitive Travel Movements
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Solution Overview
Problem
Current crane controllers require complex operation with multiple joysticks, making it difficult for operators to intuitively control the crane's travel movements, especially when handling containers, due to the need for simultaneous translational and rotational movements.
Innovation Solution
A crane controller with a grip part that is pivotable and displaceable in multiple directions, allowing for intuitive control of crane movements through a single input device, which can generate electrical signals for activating actuators based on adjustments relative to its original position, providing six degrees of freedom for precise movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple joysticks are used to control crane movements, then the crane can achieve complex superimposed travel movements and high handling capacity, but the operation becomes complex and places high concentration demands on the operator
Solution Approach 1:
The patent combines multiple control functions into a single grip part that can be displaced in three mutually orthogonal directions (x, y, z axes). This single input device replaces multiple joysticks while maintaining the ability to control complex crane movements through spatial displacement components in each direction
Solution Approach 2:
The invention adds a third spatial dimension (z-axis displacement) to the traditional two-dimensional joystick control. By allowing displacement in three mutually orthogonal directions, the system encodes multiple control parameters in a single three-dimensional space, enabling complex movements without requiring multiple separate control devices
2Measurement precision
If multiple joysticks are used to control translational and rotational movements, then the crane can achieve precise positioning, but learning the operation becomes time-consuming
Solution Approach 1:
The grip part serves multiple control functions simultaneously through its three-dimensional displacement capabilities. Each spatial direction (x, y, z) can control different crane movements, allowing a single device to replace multiple specialized joysticks and reducing the time needed to learn control operations
3Ease of operation
If a single input device with six degrees of freedom is used, then the operation becomes more intuitive and simplified, but the device complexity increases
Solution Approach 1:
The control system is segmented into independent spatial components along three mutually orthogonal axes. Each axis (x, y, z) can be controlled independently through displacement of the grip part, allowing complex six-degree-of-freedom control to be broken down into simpler one-dimensional movements along each axis
Data Source
AI summary
A crane controller for controlling travel movements of a crane, in particular a portal crane. The crane controller includes control electronics and at least one input device, connected to the control electronics, having a grip part, a main axis of the grip part is swivellable together with the grip part in at least two swivel directions oriented, in particular orthogonally, in relation to one another, and the control electronics are able to generate electrical signals, for actuating at least one actuator of the crane, on the basis of an adjustment of the grip part relative to an original position of the grip part. The grip part has its main axis additionally displaceable in at least two, preferably three, different displacement directions relative to the original position and/or is rotatable about the main axis, and the control electronics generate electrical signals for actuating the at least one actuator of the crane.