Adaptive Speed Control Device for Automatic Speed Adjustment
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Solution Overview
Problem
Current adaptive speed control systems do not effectively notify drivers of upcoming changes in posted speed limits and lack the ability to automatically adjust vehicle speed in response to new speed limits without driver intervention.
Innovation Solution
An adaptive speed control device equipped with a posted speed change detecting section, notification section, and adaptive speed control section that notifies the driver of upcoming speed limit changes and automatically adjusts the vehicle's speed based on new posted limits upon receiving a set speed signal from the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system automatically changes vehicle speed without driver notification, then productivity is improved, but driver awareness and safety are worsened
Solution Approach 1:
The notification section activates before the speed limit change occurs, informing the driver in advance of the upcoming change. This preliminary notification allows the driver to mentally prepare and understand the automatic speed adjustment, maintaining awareness while enabling efficient automatic control.
Solution Approach 2:
The system provides feedback to the driver through the notification section about the detected speed limit change and the intended automatic speed adjustment. This feedback loop maintains driver awareness and trust in the automatic control system.
2Loss of information
If the system provides detailed notification and confirmation options, then driver awareness is improved, but device complexity is worsened
Solution Approach 1:
The notification process is segmented into distinct phases: detection of speed limit change, notification to driver, and optional confirmation. This segmentation allows the system to provide comprehensive information without overwhelming the driver, managing complexity through structured information delivery.
Solution Approach 2:
The notification is tailored to the specific context - it provides detailed information when a speed limit change is detected, but remains simple and direct. The notification section adapts its content and detail level to the local situation, providing necessary information without unnecessary complexity.
3Productivity
If the system activates automatic control immediately upon speed limit change, then productivity is improved, but driver acceptance and safety are worsened
Solution Approach 1:
The notification is provided before the automatic speed control activation, giving the driver advance notice of the impending change. This preliminary notification increases driver acceptance by reducing surprise and allowing mental preparation for the automatic control action.
Solution Approach 2:
The notification section acts as a preliminary countermeasure against potential driver confusion or rejection of automatic control. By informing the driver first, the system prevents negative reactions that might occur with sudden unexpected automatic speed changes.
Data Source
AI summary
An adaptive speed control device includes a posted speed change detecting section, a notification section, a set speed signal receiving section, and an adaptive speed control section. The posted speed change detecting section is configured to detect an upcoming change to a posted speed limit at. The notification section is configured to control a user interface device to notify a new posted speed limit at a prescribed notification timing before the vehicle reaches a transition point. The set speed signal receiving section is configured to accept a set speed signal from a user input device. The adaptive speed control section is configured to change a set speed of the vehicle according to the new posted speed limit and to automatically change a speed to the set speed upon receiving the set speed signal at or after a prescribed activation timing that occurs simultaneously with or after the prescribed notification timing.