Vehicle Speed-Adaptive Sensor Threshold for Snow Adhesion
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Solution Overview
Problem
Existing driving assistance systems face interference from snow or other adhesions on object detecting sensors, leading to incorrect collision avoidance determinations due to the inability to differentiate between adhesion and hard obstacles at close ranges.
Innovation Solution
A driving assistance apparatus that adjusts detection criteria based on vehicle speed, using continuous detection time or distance traveled to determine if an object is an adhesion matter, thereby reducing interference and improving accuracy in collision avoidance systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If object detecting means is provided outside the vehicle to detect collision avoidance targets, then collision avoidance capability is improved, but snow or other substances may adhere to the sensor causing false detections that interfere with driving assistance
Solution Approach 1:
The patent applies dynamics by making the detection determination threshold variable rather than fixed. The control unit dynamically adjusts the determination threshold based on vehicle speed, extending the threshold as speed increases. This allows the system to adapt to different operating conditions and distinguish between actual obstacles and snow adhesion more effectively across varying speed ranges
Solution Approach 2:
The patent changes the parameter of the determination threshold for detecting adhesion matter based on vehicle speed. By adjusting this threshold parameter dynamically, the system can differentiate between snow adhesion and actual obstacles more accurately, reducing false detections while maintaining collision avoidance capability
2Measurement precision
If detection threshold is set to be sensitive to detect close-range objects, then collision detection accuracy is improved, but false detection of adhesion matter increases
Solution Approach 1:
The patent makes the determination threshold dynamic by linking it to vehicle speed. At higher speeds, the threshold is extended, allowing the system to tolerate larger detection values without triggering false alarms. This dynamic adjustment maintains high sensitivity for detecting actual obstacles while reducing false detections of adhesion matter
Solution Approach 2:
The system uses feedback from vehicle speed information to adjust the determination threshold. The control unit continuously monitors vehicle speed and adjusts the threshold accordingly, creating a closed-loop system that adapts to current operating conditions to minimize false detections while maintaining detection accuracy
3Device complexity
If fixed determination threshold is used to identify adhesion matter, then system complexity is reduced, but accuracy in distinguishing adhesion from obstacles deteriorates
Solution Approach 1:
The patent changes the determination threshold parameter based on vehicle speed, transforming it from a fixed value to a variable parameter. This simple parameter adjustment significantly improves the accuracy of distinguishing adhesion from obstacles without requiring complex additional hardware or algorithms
Solution Approach 2:
The patent makes the determination threshold serve multiple functions by adjusting it based on vehicle speed. The same threshold mechanism handles both collision avoidance detection and adhesion matter identification across different speed ranges, eliminating the need for separate detection systems for different conditions
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 effectively reduces false alarms and improves driver safety by accurately distinguishing between adhesion and collision-worthy obstacles, enhancing the reliability of driving assistance systems.
Implementation Method 1
an ultrasonic sensor, a millimeter wave radar, or the like) for detecting an object around a host vehicle
Implementation Method 2
when the length of a reverberation wave received by an ultrasonic sensor is larger than or equal to a threshold
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A driving assistance apparatus to be mounted on a vehicle includes: an object detecting unit configured to detect an object outside the vehicle and acquire object information including a distance to the object; a vehicle speed detecting unit configured to detect a vehicle speed of the vehicle; and a processing unit configured to carry out driving assistance associated with an object on the basis of the object information when the object has been detected by the object detecting unit, and suppress the driving assistance when a predetermined condition that is changed on the basis of the vehicle speed detected by the vehicle speed detecting unit is satisfied.