Crane Remote Control with Visual Movement Indicators
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Solution Overview
Problem
Modern cranes with multiple degrees of freedom pose a high risk of operator error and crane damage due to complex command devices, particularly in overload situations, where operators must rely on trial-and-error methods to navigate stoppage conditions without clear indications of allowable movements.
Innovation Solution
A remotely commanding device for cranes featuring a control panel with intuitive indicators and a touchscreen display showing available and inhibited movements, using color-coded states (green for allowed, red for inhibited, and yellow for limited) to assist operators in making correct decisions quickly and safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a remote command device with multiple levers is used to control a crane with multiple degrees of freedom, then the crane can execute complex movements, but the complexity of the command device increases and the risk of operator error increases
Solution Approach 1:
The system provides real-time feedback to the operator through a display showing the crane's current state, available movements, and warnings about prohibited movements. This feedback loop allows the operator to make informed decisions without needing to understand the complex interrelationships between multiple levers and crane components.
Solution Approach 2:
A microprocessor-based control system acts as an intermediary between the operator's lever inputs and the crane's actual movements. This intermediary processes the operator's commands, checks them against current crane state and safety constraints, and executes only valid movements, thereby simplifying the operator's task while maintaining full crane functionality.
2Reliability
If the crane automatically switches to stoppage state to prevent overload, then crane safety is improved, but the operator's ability to understand which operations are executable decreases
Solution Approach 1:
The display provides continuous visual feedback showing which movements are currently available and which are prohibited, along with warnings about impending safety violations. This feedback enables the operator to understand the current executable operations without needing to interpret complex system states or rely on trial-and-error.
Solution Approach 2:
Instead of requiring the operator to figure out what movements are safe by process of elimination, the system inverts the approach by explicitly showing only the safe, executable movements. The display highlights available movements and clearly indicates prohibited ones, reversing the traditional burden from operator to system.
3Loss of information
If a display showing all available and unavailable movements is provided, then complete information is given to the operator, but the display becomes difficult to examine and interpret
Solution Approach 1:
The display is segmented into distinct sections showing different aspects of crane state and available movements. Each movement is individually represented with its own indicator, allowing the operator to quickly scan and understand which specific movements are available without being overwhelmed by a monolithic display of all possible states.
Solution Approach 2:
The system uses color-coded indicators to represent different movement states (e.g., green for available, red for prohibited, yellow for warnings). This visual encoding allows the operator to instantly comprehend the current state of each movement without needing to interpret numerical data or complex symbols, dramatically reducing display interpretation complexity.
4Device complexity
If the operator must use trial-and-error to determine correct movements during stoppage, then the command device remains simple, but the reaction time increases and risk of error persists
Solution Approach 1:
The display provides immediate visual feedback indicating which movements are currently available and which will cause safety violations. This real-time feedback eliminates the need for trial-and-error by clearly guiding the operator's next action, thereby reducing reaction time without adding mechanical complexity to the command device itself.
Solution Approach 2:
The system performs preliminary analysis of the current crane state and pre-determines which movements are safe to execute before the operator acts. By preparing and displaying the list of available movements in advance, the system allows the operator to immediately select from known safe options rather than experimenting to discover safe movements.
Data Source
Figure 1a~1c
Figure 2~3
AI summary
A device (1) for remotely commanding a crane, comprises: a transmission unit suitable for stablishing a communication between the device (1) and a control unit of said crane; a control panel (3) comprising a plurality of manual control members (5), each arranged for commanding a specific movement of a plurality of available movements of the crane and the direction of said specific movement; a plurality of indicators (18) of the available movements of the crane, each correlated with the specific crane movement commandable by a respective manual control member (5), characterized in that said indicators (18) of the available movements comprise a first sector (18') and a second sector (18"), each corresponding to a direction of the movement associated to the respective indicator (18), wherein said first (18') and second (18") sectors are configured for providing a visual indication of a state, among at least two states, of the direction of the movement associated to the respective indicator (18).