ACC Target Display Activation via Dynamic Parameter Criteria
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Solution Overview
Problem
Conventional Adaptive Cruise Control (ACC) systems often display the target object to the driver unnecessarily, leading to distracting and irritating flickering of the display, especially in situations like curved roads where vehicles are frequently lost and re-detected, causing the display to alternate on and off.
Innovation Solution
The control device only activates the target object display when the dynamic parameters of the target object meet a predetermined criterion indicating imminent control intervention, using a minimum distance threshold and hysteresis to prevent unnecessary activation and deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the maximum detection distance is set large for safety reasons, then the target object can be detected at greater distances, but the display activates too early and causes unnecessary driver distraction
Solution Approach 1:
The patent introduces dynamic parameters (relative speed, relative acceleration) as additional criteria for display activation. Instead of using only distance as a parameter, the system now evaluates multiple parameters to determine when to activate the display, thereby resolving the contradiction between early detection and unnecessary distraction
Solution Approach 2:
The display activation criterion is made dynamic by incorporating relative speed and relative acceleration measurements. The system continuously monitors these dynamic parameters and adjusts display activation accordingly, rather than using a static distance threshold alone
2Loss of information
If the target object display is activated as soon as a target is detected, then the driver is informed early about the target object, but the display flickers unnecessarily when the target oscillates around the maximum detection distance
Solution Approach 1:
The system uses feedback from dynamic parameter measurements (relative speed, relative acceleration) to control display activation. By continuously monitoring these parameters and using them as feedback criteria, the system determines when control intervention is actually needed, preventing unnecessary display activation and flickering while maintaining information transparency
3Reliability
If the display is activated at large distances to ensure safety, then control intervention can be prepared early, but the display remains active even when no control intervention is needed
Solution Approach 1:
The patent applies partial action by activating the display only when dynamic parameters indicate that control intervention is actually needed or imminent, rather than activating it for all detected targets at all distances. This selective activation based on dynamic criteria ensures safety while avoiding unnecessary display consumption
Data Source
Figure 1~2(B)
Figure 3
AI summary
The apparatus has a location system (10) e.g. radar sensor, for locating a preceding vehicle. A detection module (24) detects the located vehicle as a target object for distance control. A regulator (26) regulates distance (D) to the object. A display device (30) associated with a controlling device (28) displays the object. The device (28) is designed to evaluate the distance of the object and a dynamic parameter e.g. relative speed, of the object and to display the object, when the parameter satisfies a preset display criterion. The parameter is measured from the location system (10).