Vehicle Communication Control Using Two-Zone Protected Regions
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Solution Overview
Problem
In surface mines, autonomous traveling working machines and manned vehicles often interfere, leading to potential collisions, and existing communication systems can be overwhelmed, reducing production efficiency as they frequently communicate, causing wireless communication bands to be congested and affecting command transmissions.
Innovation Solution
A traffic control device with a center-side communication device connects to onboard communication terminal devices on both manned and autonomous vehicles, using a traffic control map to set protected regions around manned vehicles, minimizing interference by optimizing communication frequency and avoiding collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent communication is conducted between the traffic control device and manned vehicles to update position information, then collision prevention capability is improved, but wireless communication bands become congested and production efficiency deteriorates
Solution Approach 1:
The system implements periodic communication at optimized intervals rather than continuous communication. The communication interval is set to balance collision prevention needs with communication band utilization, allowing position updates at reasonable frequencies without overwhelming the wireless network.
Solution Approach 2:
The protected region dynamically expands over time from the manned vehicle's position, creating a time-based safety zone. This dynamic region allows the system to maintain collision prevention by accounting for vehicle movement while reducing communication frequency, as the expanding region provides a buffer that doesn't require constant position updates.
2Measurement precision
If the protected region is frequently updated to track manned vehicle movement, then interference prevention accuracy is improved, but communication frequency increases and congestion worsens
Solution Approach 1:
The system pre-calculates and transmits protected region information at optimized intervals rather than updating continuously. By anticipating vehicle movement and pre-establishing protected regions, the system maintains accuracy while reducing the frequency of communication transactions.
Solution Approach 2:
The protected region is divided into a first protected region (inner zone) and a second protected region (outer zone). This segmentation allows the system to manage communication more efficiently by differentiating between critical inner region updates and less critical outer region notifications, reducing overall communication burden.
Data Source
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AI summary
A protected region is set for a manned working machine , said region including a first protected region in which new protected region setting request information is not transmitted and which includes the position of the manned working machine, and a second protected region which is set along a periphery of the first protected region and in which new protected region setting request information is transmitted. An area occupied by the vehicle body of the manned working machine on a plane projected on the ground surface is calculated on the basis of vehicle body information indicating the size of the vehicle body of the manned working machine and position information thereof. When the occupied area is present within the first protected region, new protected region setting request information is not transmitted, whereas when the occupied area is present within the second protected region, protected region setting request information is transmitted.