Crane Tip Direction Control for Intuitive Tool Assembly Movement
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Solution Overview
Problem
Existing crane operation systems require complex and concurrent interactions with multiple input command means, placing high demands on operators, especially for inexperienced users, to maneuver crane tools efficiently and accurately, particularly in scenarios involving obstacles or specific load handling tasks.
Innovation Solution
A crane arrangement with a crane controller that receives directional and drive commands to control the crane tool assembly, using a direction indicator to simplify operations by allowing operators to guide the crane tool movement with reduced input commands, enabling easier control through a Crane Tip Control mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional crane control systems are used with multiple input command means, then precise control of crane tool assembly is achieved, but operator complexity and training requirements increase significantly
Solution Approach 1:
A direction indicator is introduced as an intermediary element between the operator and the crane tool assembly. The direction indicator visually represents the movement direction of the crane tool assembly, allowing the operator to control the crane by simply guiding the indicator to the desired position rather than managing multiple concurrent input commands. This mediator translates complex multi-degree-of-freedom control into an intuitive single-direction guidance task.
Solution Approach 2:
The patent replaces the traditional mechanical control system with multiple physical input command means (levers, joysticks, buttons) with a visual guidance system. Instead of requiring the operator to mechanically coordinate multiple control inputs, the system uses a direction indicator that visually guides the operator, substituting mechanical control complexity with visual information processing.
2Measurement precision
If multiple input command means are provided for precise crane control, then control accuracy is improved, but the number of control elements and system complexity increase
Solution Approach 1:
The patent extracts and removes unnecessary control elements from the traditional crane control system. Instead of providing multiple input command means for controlling different degrees of freedom, the system extracts the essential control function to simply guide the direction indicator to the desired position. The crane controller then automatically calculates and executes the required movements, eliminating redundant control components.
Solution Approach 2:
The direction indicator serves multiple functions simultaneously: it displays the current movement direction of the crane tool assembly, indicates the target position for the operator to guide, and provides visual feedback for control accuracy. This single multi-functional element replaces what would traditionally require multiple specialized control devices.
3Adaptability or versatility
If conventional crane operation modes are used, then full control capability is maintained, but operational efficiency and intuitiveness decrease
Solution Approach 1:
The crane controller performs automatic calculations and coordinate transformations based on the direction indicator's position. The system serves itself by automatically determining the required movements of the crane tool assembly's multiple degrees of freedom without requiring the operator to manually coordinate each movement. This self-service capability maintains full control capability while dramatically improving operational efficiency.
Solution Approach 2:
The system pre-calculates and prepares the control commands based on the direction indicator's position before the operator actually moves the crane. The crane controller continuously monitors the direction indicator and pre-computes the necessary actuator commands, so that when the operator guides the indicator to the target position, the crane is already prepared to execute the movement efficiently.
Data Source
Figure 1a~1b
Figure 2~3
Figure 4
AI summary
The present disclosure relates to a crane arrangement (2) comprising a crane controller (200) for control of movement of a crane tool assembly (10) arranged at a second, free end of a crane boom system, said crane controller being arranged to receive a directional command for rotational displacement of the tool around its rotation axis, z_r, from an initial pointing direction, x0, of the direction indicator (11) of a tool (9) and to based thereon control at least one of said plurality of actuators to perform displacement of the tool around its rotation axis, z_r according to the directional command to a desired pointing direction, x1, of the direction indicator. The crane controller is further arranged to receive a drive command for movement of the crane tool assembly and to control at least one of said plurality of actuators to perform movement of the crane tool assembly along the desired pointing direction, x1, of the direction indicator (11) of the tool (9).