Mobile Object Speed Control for Direction-Limited Roadways
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Solution Overview
Problem
Existing control devices for mobile objects do not consider the type of area in which the vehicle moves, leading to inadequate movement control based on the vehicle's surroundings.
Innovation Solution
A control device that includes a road type recognizing unit, a limitation recognizing unit, and a control unit to adjust the speed of the mobile object based on whether it is moving on a roadway or in a predetermined area, and whether the roadway is a limitation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control device does not consider the type of area in which the mobile object moves, then the device complexity is reduced, but the adaptability to different environments deteriorates
Solution Approach 1:
The control device segments the movement area into different types (roadway and predetermined area other than roadway) and applies different speed control rules to each segment. The control unit switches between first speed control for roadways and second speed control for other areas, enabling environment-specific adaptation without requiring overly complex centralized control logic.
Solution Approach 2:
The control device dynamically adjusts the speed control mode based on the recognized area type. When the road type recognizing unit identifies a roadway, the control unit applies first speed control; when it identifies a predetermined area other than a roadway, the control unit applies second speed control. This dynamic switching enables adaptability while maintaining relatively simple control structure.
2Reliability
If the control device limits speed to a second speed lower than the first speed when moving in the second direction on a limitation area, then the safety is improved, but the productivity is reduced
Solution Approach 1:
The control device applies different speed control qualities to different directions on limitation areas. When moving in the first direction (permitted direction), the control unit allows higher first speed for improved productivity. When moving in the second direction (opposite direction), the control unit enforces lower second speed for improved safety. This local differentiation of control parameters optimizes both safety and productivity based on directional context.
Solution Approach 2:
The control unit changes the speed parameter based on the combination of movement direction and area type. The speed parameter is set to first speed when moving in the first direction on a limitation area, and changed to second speed (lower than first speed) when moving in the second direction on a limitation area. This parameter adjustment resolves the contradiction between safety and productivity.
3Measurement precision
If the control device recognizes the limitation area based on sensing device output and map information, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The limitation recognizing unit merges two information sources: output from the sensing device (detecting signs and road markings) and map information (pre-stored limitation area data). By combining these sources, the system achieves high recognition accuracy without requiring a single complex recognition system, distributing the recognition function across multiple simpler components.
Solution Approach 2:
The limitation recognizing unit acts as an intermediary that processes and integrates information from both the sensing device and map storage unit. It compares real-time sensing output with pre-stored map information to determine whether the mobile object is in a limitation area, thereby improving measurement precision while maintaining manageable system complexity through modular information processing.
Data Source
AI summary
A control device for a mobile object is a control device for a mobile object that one or more occupants board and that is able to move both on a roadway and in a predetermined area other than a roadway. The control device includes: a road type recognizing unit configured to recognize whether the mobile object is moving on the roadway or in the predetermined area on the basis of an output of a sensing device for sensing an external situation of the mobile object; a limitation recognizing unit configured to recognize the roadway on which the mobile object is moving is a limitation area in which movement of a vehicle in a first direction is permitted and movement of a vehicle in a second direction opposite to the first direction on the basis of the output of the sensing device; and a control unit configured to limit a speed of the mobile object to a first speed when the mobile object moves on the roadway, the roadway is the limitation area, and the mobile object is moving in the first direction and to limit the speed of the mobile object to a second speed lower than the first speed when the mobile object moves on the roadway, the roadway is the limitation area, and the mobile object is moving in the second direction.