Ultrasonic Radar Sensor Assembly Filtering Attached Structures
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Solution Overview
Problem
Existing parking sensors on large automobiles with attached structures can erroneously generate continuous alert signals due to the proximity of the attached structures, leading to potential missed alerts for actual obstacles and increased collision risk.
Innovation Solution
An ultrasonic radar sensor assembly is installed on the automobile, comprising ultrasonic radar sensors and a control unit that operates in learning and detecting modes. The control unit filters out detected distances within a fixed range determined during the learning mode, allowing only effective detected distances outside this range to trigger alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If parking sensors are installed on the lower back part of the carriage, then the sensors can detect obstacles in the proximity of the automobile, but the attached structures may come into proximity to the sensors and cause erroneous continuous alert signals
Solution Approach 1:
The system performs a learning phase before normal operation to identify and store the fixed distance range corresponding to attached structures. This preliminary action enables the system to distinguish between attached structures and actual obstacles during subsequent detecting mode operation, preventing false alerts while maintaining accurate obstacle detection.
Solution Approach 2:
The system extracts and filters out the fixed distance range data corresponding to attached structures from the overall detection data. By separating this known interference pattern from the detection results, the system eliminates false alerts caused by attached structures while preserving the ability to detect actual obstacles.
2Object-generated harmful factors
If the parking sensors are relocated to other locations, then the false alerts from attached structures may be reduced, but some areas in the proximity of the automobile may be left unmonitored
Solution Approach 1:
The system uses feedback from the learning phase to continuously refine its understanding of the environment. By comparing detected distances against the stored fixed distance range during detecting mode, the system can distinguish between attached structures and actual obstacles, maintaining full monitoring coverage without relocating sensors.
3Object-generated harmful factors
If the controller filters out detected distances within the fixed distance range, then false alerts from attached structures are reduced, but the system complexity increases due to learning and detecting modes
Solution Approach 1:
The learning phase performs the complex data collection and analysis work in advance, storing only the essential fixed distance range information. This preliminary action simplifies the detecting mode operation, where the system only needs to compare current detections against the pre-stored range, reducing real-time computational complexity.
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 ultrasonic radar sensor assembly effectively reduces false alerts caused by attached structures, ensuring that drivers are alerted only to actual obstacles within a safe distance, thereby reducing the risk of collisions.
Implementation Method 1
the ultrasonic radar sensor, when activated, being configured to emit an ultrasonic wave, and to obtain a response wave signal that results from a reflection of the ultrasonic wave by a nearby object
Data Source
AI summary
An ultrasonic radar sensor assembly installed on an automobile includes an ultrasonic radar sensor that emits an ultrasonic wave and obtains a response wave signal that indicates a plurality of detected distances, and a control unit. When operating in a learning mode, the control unit activates the ultrasonic radar sensor, receives the response wave signal, and determines a fixed distance range based on the response wave signal. When operating in a detecting mode, the control unit activates the ultrasonic radar sensor, receives the response wave signal, performs a filtering operation to filter out the detected distances that are within the fixed distance range, determines each of the detected distances not within the fixed distance range as an effective detected distance, and when that the effective detected distance is not larger than a predetermined distance threshold, generates and outputs an alert.