Mobile Object Speed Control at Roadway-Sidewalk Transitions
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Solution Overview
Problem
Existing technologies fail to appropriately control mobile objects when transitioning from roadways to predetermined regions such as sidewalks, leading to potential control issues and safety concerns.
Innovation Solution
A mobile object control device and method that includes a hardware processor to acquire road situation information, recognize the object's location on a roadway or sidewalk, and adjust speed limits based on detected contact points and road conditions, suggesting deceleration or changing speed modes to ensure safe transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile object maintains a constant speed when transitioning from roadway to predetermined region, then the movement efficiency is maintained, but the safety and comfort during transition deteriorates
Solution Approach 1:
The control device dynamically adjusts the speed limit based on the detected region type. When transitioning from roadway to predetermined region, the system changes the speed parameter from first speed (roadway) to second speed (predetermined region), making the speed limit adaptive rather than fixed. This resolves the contradiction by allowing efficiency on roadways while ensuring safety during transitions to predetermined regions.
Solution Approach 2:
The control device continuously detects the current region type using detection information and provides feedback to adjust the speed limit accordingly. When the detection information indicates entry into a predetermined region, the system feedback-adjusts the speed limit from first speed to second speed. This closed-loop feedback mechanism ensures safety during transitions while maintaining movement efficiency on roadways.
2Device complexity
If the mobile object uses a single speed limit for all regions, then the control system is simple, but the appropriateness of speed control in different regions deteriorates
Solution Approach 1:
The system segments the operating environment into distinct region types (roadway and predetermined region) with different speed requirements. By detecting which segment the mobile object is in, the control device applies the appropriate speed limit (first speed for roadway, second speed for predetermined region). This segmentation approach enables appropriate speed control for different regions without requiring overly complex control logic.
Solution Approach 2:
The control device applies different speed limit qualities to different spatial locations. The first speed limit applies locally to roadway regions, while the second speed limit applies locally to predetermined regions. This local differentiation of speed control parameters ensures appropriateness for each region type while keeping the overall control system relatively simple through clear regional distinctions.
3Ease of operation
If the mobile object does not provide speed adjustment warnings, then the user experience is simple, but the awareness of speed changes deteriorates
Solution Approach 1:
The control device performs preliminary action by notifying the occupant before the speed limit actually changes. When detection information indicates upcoming transition to a predetermined region, the system first provides a notification to the occupant, then subsequently adjusts the speed limit. This preliminary notification ensures the occupant is aware of the upcoming speed change while maintaining simple operation through automatic execution.
Solution Approach 2:
The system applies preliminary anti-action by notifying the occupant in advance of the speed limit reduction, allowing the occupant to mentally prepare for the change. This preliminary warning prevents sudden unexpected speed changes that could cause discomfort or confusion, while the automatic execution maintains operational simplicity. The notification counteracts potential negative effects of speed changes before they occur.
Data Source
AI summary
A hardware processor of a mobile object executes the program stored in a storage device to acquire information indicating a road situation in a traveling direction of a mobile object; to recognize whether the mobile object is moving on a roadway or a predetermined region different from the roadway; to recognize presence of a contact portion between the sidewalk and the predetermined region in the traveling direction of the mobile object; to control the speed of the mobile object at least partially, and limit a speed at which the mobile object is moving on the roadway to a first speed and limit a speed at which the mobile object is moving on a sidewalk to a second speed slower than the first speed; and to bring a speed of the mobile object closer to the second speed when the mobile object is moving on the roadway, the contact portion is recognized within a predetermined range from the mobile object, and the road situation is in a predetermined state.