Adaptive Cruise Control Secondary Detector Boundary Coverage
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Solution Overview
Problem
Current adaptive cruise control systems face challenges in detecting vehicles at the boundary of their field of view, leading to a high risk of collision when another vehicle approaches or pushes in from an angle, as the front central radar and camera sensors cannot effectively track or detect objects in these positions.
Innovation Solution
The system incorporates a secondary detector with a field of view that covers the boundary of the main detector's field of view, oriented outward from the vehicle's forward direction, which sends an indication signal to adjust the threshold value for the driving environment, allowing the control unit to determine if vehicle control is necessary and execute appropriate actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a front central radar with a field of view of ±120° is used for adaptive cruise control, then the detection coverage ahead of the vehicle is improved, but vehicles at the boundary of the field of view cannot be detected, leading to collision risk
Solution Approach 1:
The detection system is segmented into a main detector for central field detection and secondary detectors positioned at corners for boundary detection. Each detector handles a specific sector, ensuring complete coverage without gaps at the boundaries where the main detector's sensitivity decreases.
Solution Approach 2:
Secondary detectors act as intermediaries to detect objects at the boundary regions that the main detector cannot reliably detect. These corner-mounted detectors bridge the gap in detection coverage, providing supplemental information about vehicles approaching from angled directions.
2Area of stationary object
If the field of view of the main detector is increased to cover more area, then more vehicles can be detected, but the detection precision at the boundary remains insufficient
Solution Approach 1:
Different detectors are positioned to provide optimized detection quality for different spatial regions. The main detector provides high-precision detection for central objects, while secondary detectors provide specialized detection capability for boundary regions, ensuring high measurement precision throughout the entire field of view.
3Reliability
If multiple detectors are added to cover the boundary field of view, then detection capability is improved, but the system complexity increases
Solution Approach 1:
The secondary detectors serve multiple functions: they detect vehicles at the boundary, provide early warning of approaching vehicles, and supplement the main detector's coverage. This multi-functionality justifies the added complexity by providing enhanced safety and detection reliability across the entire field of view.
Data Source
AI summary
An adaptive cruise control system includes an information acquisition unit having a main detector and a secondary detector, a control unit, and an execution unit. The main detector detects an object located ahead of the vehicle. The control unit determines whether control of the vehicle is required depending on an actual value determined by the main detector and the threshold value of a system property characterizing the driving environment. The execution unit controls the vehicle. The secondary detector is arranged such that its field of view for detecting an object located at an angle ahead of the vehicle covers the boundary of the main detector's field of view, and which is oriented outwards in relation to the forward direction of the vehicle. The secondary detector sends an indication signal to adjust the threshold value of the system property when an object is detected.