Radar Bumper State Detection via Reflection Level Thresholding
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Solution Overview
Problem
The performance of radar apparatuses is degraded due to strong reflections from painted vehicle bumpers, which affect the reception level and accuracy of detected waves, leading to reduced detection capabilities.
Innovation Solution
A radar apparatus with a transmission processor that transmits wave signals, a reception processor that detects object-reflected and bumper-reflected waves, and a bumper determiner that compares the reception level of a combined wave signal with a threshold to determine the presence of a bad bumper state, facilitating the detection of bumper conditions that impact performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bumper is painted for mending, then the appearance is restored, but the radar performance is degraded due to strong reflections
Solution Approach 1:
The radar apparatus performs preliminary detection of the bumper state by analyzing the reflection characteristics of transmitted waves. The reception level detection unit measures the reception level of transmitted waves, and the bumper state determination unit compares this level against thresholds to determine if the bumper is in a good or bad state before radar detection is performed, allowing the system to adapt to the bumper condition in advance
Solution Approach 2:
The system changes the evaluation parameters based on bumper state. When a bad bumper state is detected (high reception level indicating strong reflection), the radar apparatus adjusts its detection parameters or excludes data from the problematic direction, thereby adapting to the changed reflection characteristics caused by paint mending
2Measurement precision
If the reception level threshold is set low, then detection sensitivity is improved, but false detections increase due to bumper reflections
Solution Approach 1:
The system performs preliminary assessment of the bumper state by measuring the reception level of transmitted waves and comparing it to predetermined thresholds. This preliminary action identifies directions with strong bumper reflections before object detection is performed, allowing the system to adjust detection sensitivity or exclude problematic directions to avoid false detections
Solution Approach 2:
The reception level detection unit continuously monitors the reception level, and the bumper state determination unit provides feedback by determining whether the bumper is in a good or bad state. This feedback mechanism allows the radar system to dynamically adjust its detection parameters based on the current bumper condition, maintaining high detection accuracy while avoiding false alarms
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
Enables accurate detection of bumper states that degrade radar performance, ensuring reliable operation by distinguishing between good and bad bumper states based on reception levels, thereby improving detection accuracy and preventing performance degradations.
Implementation Method 1
a transmission processor, which transmits first wave signals from inside of the bumper toward outside
Implementation Method 2
a reception processor that receives an object-reflected wave signal that is a reflection of the first wave signals by a target in an area around the vehicle, a bumper-reflected wave signal that is a reflection of the first wave signals by the bumper
Data Source
AI summary
A radar apparatus includes: a transmission processor which transmits first wave signals from inside of the bumper toward outside, the transmission processor being provided inside of the bumper; a reception processor which receives an object-reflected wave signal that is a reflection of the first wave signals by a target in an area around the vehicle, a bumper-reflected wave signal that is a reflection of the first wave signals by the bumper, and a transmission and reception leak signal of the first wave signals and detects the target through the object-reflected wave signal; and a bumper determiner which detects a first reception level of a second wave signal including the bumper-reflected wave signal and the transmission and reception leak signal, compares the first reception level with a threshold, and determines the presence of a bad bumper state in a case where the first reception level is higher than the threshold.