Parking Assistance Sensor Malfunction Handling
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Solution Overview
Problem
Existing parking assistance apparatuses face challenges when one of the external recognition sensors malfunctions during automatic parking, leading to degradation in detection characteristics and hindering the continuation of automatic parking assistance.
Innovation Solution
A parking assistance apparatus equipped with multiple external recognition devices, such as cameras and sonars, and a control unit that switches control to the functioning sensor when one malfunctions, allowing for continued automatic parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple external recognition devices are used for automatic parking, then the reliability of automatic parking is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple external recognition devices (camera and sonar) into a unified automatic parking system. The control unit integrates data from both sensors to perform parking control, achieving improved reliability through combined sensing capabilities while managing system complexity through centralized control logic.
Solution Approach 2:
The control unit is designed to universally handle inputs from multiple types of external recognition devices and switch between them based on functionality. This multi-functional design allows the same control unit to process data from cameras, sonars, or either sensor individually, reducing overall system complexity while maintaining reliability.
2Reliability
If one external recognition device malfunctions during automatic parking, then the detection characteristics degrade, but the automatic parking can continue by switching to the other device
Solution Approach 1:
The system prepares for potential sensor failures by implementing a malfunction determination function that continuously monitors external recognition devices. When a malfunction is detected, the control unit switches to using only the functional sensor, cushioning against the adverse effects of sensor failure and maintaining automatic parking capability.
Solution Approach 2:
The control unit dynamically changes operational parameters by switching between different sensor configurations based on malfunction status. When both sensors are functional, the system uses combined detection; when one malfunctions, it transitions to single-sensor operation, adapting the detection parameters to the current system state.
Data Source
AI summary
When one sensors fails and thus malfunctions during automatic parking of a vehicle, only the other sensor functions. Accordingly, depending on the behavior of the vehicle, the detection characteristics of the other sensor cause degradation in recognition of the vehicle, hindering the automatic parking from being continued. In processing S401, a determination is made whether or not an external recognition device, such as a camera or sonar, malfunctions. In processing S402, based on the determination on malfunction of the external recognition device, a determination is made whether or not to restrict vehicle speed or to restrict a path, with reference to restriction information for parking control. The restriction information for parking control provides information for restricting the vehicle speed in accordance with the malfunction of the camera, and for restricting the path in accordance with the malfunction of the sonar. Next, in processing S403, a determination is made whether or not the automatic parking is in progress. When the automatic parking is in progress, the process proceeds to processing S404 where vehicle speed control or the like is performed for the automatic parking in accordance with the malfunction of the external recognition device.