Angle-Detecting Door Handle Assembly for Continuous Position Control
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Solution Overview
Problem
Existing vehicle door handle systems face challenges in providing flexible operation, as force sensing can be expensive and difficult to assemble, while switch-based systems lack position information during travel between switch positions, necessitating broad parameter application to account for friction and unexpected factors.
Innovation Solution
An angle-detecting door handle assembly that includes a handle member, a four-bar link, a motor, a rotary sensor, and a controller, where the rotary sensor detects the angle of the four-bar link to control the motor's actuation, using a magnet and Hall or magnetoresistive sensor for precise position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are used in the handle mechanics, then position sensing capability is provided, but the system becomes expensive and difficult to assemble
Solution Approach 1:
The patent replaces the mechanical force sensing system with an optical/magnetic sensing system. A rotary sensor (optical or magnetic) detects the angle of the four-bar link, converting mechanical position into an electrical signal without requiring force sensors integrated into the handle mechanics. This substitution eliminates the need for complex mechanical force sensing while maintaining position detection capability.
Solution Approach 2:
The patent introduces a four-bar link as an intermediary mechanical element between the handle and the rotary sensor. The four-bar link translates handle position into a rotational angle that can be easily measured by the rotary sensor. This intermediary mechanism simplifies the sensing approach while maintaining accurate position detection.
2Measurement precision
If switches are used to sense handle position, then extreme position detection is provided, but position information is lost during travel between switch positions
Solution Approach 1:
The rotary sensor provides continuous angle measurement throughout the entire range of motion of the four-bar link, rather than discrete switch positions. This continuous sensing eliminates information loss during travel between positions, allowing the system to know the exact handle position at all times during actuation.
Solution Approach 2:
The patent changes the measurement parameter from discrete switch states to continuous angular position. The rotary sensor outputs a continuous signal representing the angle of the four-bar link, providing rich position information throughout the full range of motion rather than limited switch trigger points.
3Reliability
If broader parameters are applied to handle travel, then friction and unexpected factors are accounted for, but position precision is reduced
Solution Approach 1:
The rotary sensor provides real-time feedback on the actual angle of the four-bar link during actuation. This feedback allows the control system to monitor the true position and make precise adjustments, compensating for friction and unexpected factors without needing to apply broad, imprecise parameters.
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 provides flexible and precise control of the door handle's position, allowing for continuous angle monitoring and user interaction detection, enhancing operational flexibility and reducing assembly complexity.
Implementation Method 1
The rotary sensor comprises a Hall sensor or a magnetoresistive sensor
Implementation Method 2
The rotary sensor comprises a Hall sensor or a magnetoresistive sensor
Data Source
AI summary
An angle-detecting door handle assembly comprises: a handle member; a four-bar link configured to move the handle member between at least retracted and presented positions relative to a door surface; a motor configured to actuate the four-bar link; a rotary sensor configured to detect an angle of the four-bar link throughout actuation and generate a signal corresponding to the detected angle; and a controller configured to control the motor based on the signal from the rotary sensor.