Crane Load Transport Path Selection by Actuator Priority
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Solution Overview
Problem
Crane operators face challenges in determining the optimal transport path for loads due to varying actuator speeds and conditions, which can result in suboptimal transport times and fuel consumption, even with existing transport plan generation devices.
Innovation Solution
A crane system equipped with a path generation unit that sets an operable range, generates nodes and paths within that range, and determines a transport path using a combination of actuator movements, prioritizing actuation speed and fuel efficiency to select the path with the shortest transport time or smallest fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the shortest transport path is selected based on linear movement between divided spaces, then the transport distance is minimized, but the transport time is not necessarily minimized due to different actuator speeds
Solution Approach 1:
The patent changes the parameters used for path evaluation from simple geometric distance to a composite metric that incorporates actuator-specific parameters such as speed, acceleration, and operational constraints. This allows the system to select paths that optimize transport time rather than just minimizing distance, by adjusting the evaluation criteria to reflect actual actuator performance characteristics
Solution Approach 2:
The system dynamically adjusts path selection based on real-time actuator conditions and constraints. Instead of using a static shortest path algorithm, the patent implements a dynamic evaluation process that considers varying actuator speeds and operational states, allowing the optimal path to change based on current system conditions
2Adaptability or versatility
If multiple actuator combinations are used to move the load, then transport flexibility is improved, but determining the optimum transport path becomes more complex
Solution Approach 1:
The patent segments the overall transport task into discrete path candidates, each associated with specific actuator combinations. By dividing the complex multi-actuator coordination problem into separate evaluable path options, the system can assess each segment independently and select the optimal combination without being overwhelmed by the full complexity of all possible actuator interactions
Solution Approach 2:
The system introduces an intermediary evaluation mechanism that mediates between multiple actuator combinations and the final path selection. This intermediary layer processes actuator constraints and performance data to evaluate path candidates, simplifying the decision-making process by acting as a buffer between the complex actuator system and the path determination logic
Data Source
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AI summary
The present invention addresses the problem of providing a crane with which it is possible to transport a load on an optimal transport path in consideration of actuation conditions of an actuator. The present invention provides a crane (1) in which a boom (9) that is capable of derricking and extending/retracting is provided to a swiveling base (8), wherein the crane (1) comprises: an operable-range-setting unit (32a) that sets an operable range (Ar) in which a load (W) being transported can be transported, the operable range (Ar) being set according to the weight (Wg) of the load (W); a path generation unit (32b) that generates, within the set operable range (Ar), a plurality of nodes P(n) through which the load (W) can pass and a plurality of paths R(n) connecting adjacent nodes P(n); and a transport path determination unit (32c) that determines a transport path (CR) of the load (W) on the basis of a priority sequence for actuating a plurality of actuators of the crane (1), the transport path (CR) satisfying a prescribed condition, and being determined from the generated plurality of nodes P(n) and plurality of paths R(n).