Mobile Body Travel Timing Control at Virtual Path Areas

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Solution Overview

Problem

In environments where autonomous and guideline-type mobile bodies travel, deviations in timing can lead to collisions or deadlocks, making it difficult to maintain a planned schedule and ensuring safe passage.

Innovation Solution

A travel control apparatus that sets virtual areas on travel paths and controls the timing of mobile bodies based on passing sequence information, using a virtual area setter and travel controller to manage the passage of mobile bodies through designated areas, preventing contention by adjusting departure and passage times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If mobile bodies travel autonomously without centralized timing control, then operational flexibility is improved, but collision risk and deadlock occurrence increase

Engineering Contradiction:
Improveoperational flexibilityVSAvoidcollision risk
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary timing coordination by establishing passing sequences and virtual area allocation before mobile bodies arrive at critical sections. The travel control apparatus pre-calculates and communicates passage timing information to mobile bodies, ensuring they arrive at virtual areas at coordinated times rather than reacting to conflicts after they occur.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The travel control apparatus acts as an intermediary between mobile bodies, managing their interactions through centralized timing control. It receives travel plan information from mobile bodies, calculates coordinated passage timing, and returns control information to guide their movement, thereby mediating potential conflicts without requiring direct communication between mobile bodies themselves.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If centralized timing control is implemented to prevent collisions, then safety is improved, but system complexity and control overhead increase

Engineering Contradiction:
ImprovesafetyVSAvoidcontrol system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The control system segments the travel path into discrete virtual areas along each travel route. Each virtual area represents a controllable section where timing coordination can be independently managed. This segmentation allows the complex control problem to be broken down into simpler, localized timing decisions at each virtual area rather than managing the entire path as one complex unit.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system changes the control parameter from continuous position monitoring to discrete timing coordination at virtual area boundaries. By focusing control on passage timing information rather than continuous spatial management, the system reduces computational complexity while maintaining safety. The travel control apparatus only needs to calculate and communicate timing parameters rather than continuously optimize complex spatial trajectories.

Inventive Principle:
Principle #35Parameter changes

3Productivity

If virtual areas are set on all travel paths for timing control, then passage coordination is improved, but computational load and processing time increase

Engineering Contradiction:
Improvepassage coordination efficiencyVSAvoidprocessing time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The system applies timing control selectively based on local conditions. Virtual areas are established at specific locations where travel paths intersect or where contention is likely to occur, rather than uniformly along entire paths. The travel control apparatus identifies critical sections requiring coordination and concentrates computational resources there, reducing overall processing time while maintaining coordination efficiency where it matters most.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS11468770B2Travel control apparatus, travel control method, and computer program
Publication Date: 2022.10.11 KK TOSHIBA
  • US11468770B2 patent drawing
  • US11468770B2 patent drawing
  • US11468770B2 patent drawing

AI summary

According to one embodiment, a travel control apparatus includes an area setter configured to set a second area on at least one of a plurality of travel paths provided among a plurality of first areas; and a travel controller configured to control timing of a first mobile body to pass through the second area on a travel route of the first mobile body based on passing sequence information on one of the first areas that is located behind the second area, wherein the passing sequence information defines a sequence in which a plurality of mobile bodies including the first mobile body passes through the first area.