Vehicle Rear Door Control System Gesture Feedback
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Solution Overview
Problem
Existing vehicle rear door control systems lack the ability to accurately and intuitively open rear doors using movement gestures, often requiring manual operation or relying on proximity sensors without providing feedback on incorrect gestures.
Innovation Solution
An automatic rear door control system that incorporates a projector to display images indicating correct movement gestures, utilizing a combination of sensors (keyfob sensor array, movement detection sensor, and proximity sensors) connected to an electronic controller to determine if a movement gesture is conforming, and if not, projects images guiding the user to correct the gesture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a movement detection sensor is used to detect gestures for automatic rear door opening, then the ease of operation is improved, but the reliability is worsened due to inability to accurately distinguish conforming gestures from incorrect gestures
Solution Approach 1:
The system projects visual feedback images on the ground to guide users on correct gesture execution. When an incorrect gesture is detected, the system provides real-time visual cues showing the proper gesture pattern, enabling users to correct their action and improving both reliability and ease of operation.
Solution Approach 2:
The patent replaces simple mechanical proximity sensing with an optical projection system that uses images to communicate gesture requirements. This substitution transforms the system from passive detection to active guidance, significantly improving gesture recognition accuracy while maintaining ease of use.
2Measurement precision
If visual feedback is provided through projected images, then the measurement precision of gesture evaluation is improved, but the device complexity increases due to addition of projector and control system
Solution Approach 1:
The projector serves as an intermediary between the movement detection sensor and the user. Instead of directly processing complex gesture data, the system uses visual images as a mediator to communicate gesture requirements and evaluation results, simplifying the overall system architecture while improving measurement precision.
Solution Approach 2:
The system projects visual copies or representations of the correct gesture pattern onto the ground. This copying approach allows users to see and replicate the desired gesture without requiring complex internal processing, thereby improving precision while keeping device complexity manageable.
3Reliability
If the system requires both keyfob detection and conforming gesture recognition for door opening, then the security is improved, but the ease of operation is worsened due to multiple requirements
Solution Approach 1:
The system performs preliminary detection of the keyfob before requiring gesture execution. By pre-verifying authorization, the system reduces the operational burden on users, as they only need to perform the gesture when already authorized, thereby maintaining security while improving ease of operation.
Solution Approach 2:
The system dynamically adjusts its requirements based on keyfob detection status. When a valid keyfob is detected, the system activates gesture recognition mode with visual feedback, creating a flexible two-stage authentication process that maintains security while optimizing ease of operation for authorized users.
Data Source
AI summary
A rear door control system includes an electronic controller connected to a rear door movement device, a keyfob sensor array, a movement detection sensor, and a projector. The electronic controller determines whether or not a movement gesture made by the individual standing within a prescribed location relative to the rear door is a conforming gesture, and in response to determining that the movement gesture is a conforming gesture, the electronic controller operates the rear door movement device to open the rear door in further response to a determination that the authorized keyfob is present. As well, in response to determining that the movement gesture is not a conforming gesture, the electronic controller operates the projector to project an image indicating that the movement gesture is not a conforming gesture, leaving the rear door in the closed orientation.