Driving Assist Device Sensor Reliability Control
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Solution Overview
Problem
Existing vehicle driving assist devices fail to consistently provide inter-vehicle distance control due to unreliable sensor outputs from millimeter wave radar and cameras, leading to erroneous detection and incomplete driving assist functions.
Innovation Solution
A driving assist device utilizing a control system that differentiates between the reliability of millimeter wave radar and camera outputs, executing inter-vehicle distance control based on predetermined conditions related to sensor reliability, ensuring continuous and accurate assistance by using both sensors' outputs effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inter-vehicle distance control is executed based on sensor output when detection reliability is low, then driving assist functionality is maintained, but erroneous detection occurs
Solution Approach 1:
The system changes the operational parameters of inter-vehicle distance control based on detection reliability conditions. When reliability is high, normal control is executed; when reliability is low, the control parameters are adjusted to prevent erroneous actions, thus maintaining functionality while avoiding errors
Solution Approach 2:
The system continuously monitors detection reliability from multiple sensors and uses this feedback to dynamically adjust whether to execute inter-vehicle distance control. This feedback mechanism allows the system to maintain assist functionality while avoiding erroneous control actions when sensor reliability is compromised
2Reliability
If inter-vehicle distance control is not executed when sensor reliability is low, then erroneous detection is avoided, but driving assist function becomes incomplete
Solution Approach 1:
The system dynamically adjusts the execution state of inter-vehicle distance control based on real-time detection reliability conditions. Rather than a fixed on/off approach, the control execution is continuously adapted to current sensor performance, maintaining functionality when reliable and preventing errors when unreliable
3Reliability
If multiple sensors are used for detection, then detection reliability improves, but device complexity increases
Solution Approach 1:
The system merges the detection outputs from multiple sensors (millimeter wave radar and camera) into a unified detection result. By combining sensor data and evaluating joint reliability, the system achieves improved detection reliability while managing complexity through integrated processing rather than separate independent systems
Solution Approach 2:
The control device performs multiple functions: it processes detection results from different sensor types, evaluates reliability conditions for each sensor type, and determines control execution based on combined information. This multi-functionality allows the system to handle various sensor configurations and reliability scenarios with a single integrated device
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures continuous and accurate inter-vehicle distance control by adjusting parameters according to sensor reliability, reducing unnatural vehicle motion and enhancing driving assist functionality even in unreliable environments.
Implementation Method 1
recognize three-dimensional objects external to a vehicle based on the output of a millimeter wave radar serving as a sensor
Implementation Method 2
recognize three-dimensional objects external to a vehicle based on the output of a camera
Data Source
AI summary
A driving assist device includes a first sensor, a second sensor, and a control device. The control device does not execute an inter-vehicle distance control under a predetermined first condition upon determination that at least one preceding object is detected based on the output of one of the first sensor and the second sensor without being detected based on the output of the other of the first and second sensors; and an environment of a non-detection sensor that is the other of the first and second sensors satisfies a first requirement for determination of a reliability of the output of the non-detection sensor; and the control device executes the inter-vehicle distance control under a predetermined second condition upon determination that the environment of the non-detection sensor satisfies a second requirement for determination of the reliability of the output of the non-detection sensor.