Berthing Parameter Calculation Using Nearest-Neighbor Reference Points
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Solution Overview
Problem
Existing berthing support systems for ships struggle to calculate parameters such as distance, speed, and angle with high accuracy, which is crucial for safe and smooth berthing.
Innovation Solution
An information processing device that acquires measurement data from a ship-mounted measurement device, extracts the nearest neighbor point to a reference point from measured points of a berthing place, and sets the reference point for the next processing time based on these nearest neighbor points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional berthing support systems use standard measurement and calculation methods, then the system structure remains simple, but the measurement precision and calculation accuracy of berthing parameters deteriorate
Solution Approach 1:
The patent segments the berthing place measurement data into multiple vertical lines corresponding to different horizontal position indices. For each vertical line, the system independently extracts the nearest neighbor point to the reference point, enabling precise calculation of berthing parameters at multiple positions along the berthing place rather than using a single averaged measurement.
Solution Approach 2:
The patent introduces a new processing dimension by organizing measurement data into a two-dimensional structure with horizontal direction indices and vertical direction indices. This allows the system to process and analyze berthing place geometry in multiple dimensions, improving the accuracy of distance, speed, and angle calculations through multi-perspective data analysis.
2Measurement precision
If the system processes berthing data using a single reference point, then the processing is simple, but the accuracy of calculated parameters deteriorates due to inability to account for varying distances across the berthing place
Solution Approach 1:
The patent divides the berthing place into multiple segments corresponding to different horizontal position indices. Each segment has its own nearest neighbor point extraction, allowing the system to calculate accurate local parameters for each segment while maintaining efficient processing through systematic organization of the segmented data.
Solution Approach 2:
The patent performs preliminary extraction of nearest neighbor points for each vertical line before conducting the final parameter calculations. This preliminary organization of data structures and identification of key points streamlines subsequent calculation processes, maintaining high processing speed while achieving improved accuracy through the use of pre-identified critical measurement points.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate calculation of berthing parameters, ensuring safe and smooth berthing operations by improving the precision of distance, speed, and angle calculations.
Implementation Method 1
a measurement device (lidar) that measures a distance to an object
Implementation Method 2
the light irradiated from the lidar and then reflected by the object around the berthing position can be received by the lidar
Data Source
AI summary
The information processing device comprises: an acquisition means, a nearest neighbor point extraction means, and a reference point setting means. The acquisition means acquires measurement data which is a set of data specified by a pair of an index representing a position in a horizontal direction and an index representing a position in a vertical direction generated by a measurement device installed on a ship. The nearest neighbor point extraction means extracts the data representing a nearest neighbor point which is nearest to a reference point of the ship, from the data representing measured points of a berthing place, for each index representing the position in a horizontal direction. The reference point setting means sets the reference point at a next processing time, based on the nearest neighbor points.