Vehicle Door Handle Dual-Sensor Latch Release Control
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Solution Overview
Problem
The risk of unintentional latch release in electric latch systems is high due to the lack of separate triggers for unlocking and latch releasing, and existing vibration sensors at the door handle can lead to accidental latch release even when the user does not intend to open the door.
Innovation Solution
A vehicle door control device equipped with an entry detection sensor and an external force detection sensor, which work in conjunction with a circuit portion to control the latch release based on the detection of an object entry and application of external force to the handle member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a vibration sensor is used to detect user operation for unlocking the door, then the ease of operation is improved, but the reliability deteriorates due to the risk of unintentional latch release
Solution Approach 1:
The door opening operation is segmented into two distinct phases: unlocking (triggered by vibration detection) and latch releasing (triggered by pull detection). By separating these functions into different sensor-triggered actions, the system prevents unintentional latch release while maintaining ease of operation for legitimate door opening.
Solution Approach 2:
The control unit acts as an intermediary that processes signals from both the vibration sensor and pull sensor. It coordinates between these sensors to determine the appropriate action (unlocking vs. latch releasing), preventing false latch release while maintaining responsive operation.
2Device complexity
If the latch is released by a single sensor trigger, then the device complexity is reduced, but the reliability deteriorates due to accidental latch release
Solution Approach 1:
The control logic is segmented to handle different sensor inputs separately: vibration sensor signals trigger unlocking, while pull sensor signals trigger latch releasing. This functional segmentation prevents accidental latch release while maintaining relatively simple device architecture.
Solution Approach 2:
The control unit implements feedback processing by continuously monitoring signals from both sensors and adjusting the latch state accordingly. This feedback mechanism ensures that latch releasing occurs only when appropriate pull force is detected, preventing false activation while maintaining simple device structure.
Data Source
AI summary
A vehicle door control device 1 according to the present invention relates to a vehicle door control device 1 for controlling opening and closing of a door of a vehicle, wherein the vehicle door control device 1 comprises: a handle member 30 attached to the door; an entry detection sensor 31 for detecting entry of an object into a space between the door and the handle member 30; an external force detection sensor 32 for detecting application of an external force to the handle member 30; and a circuit portion 4 connected to the entry detection sensor 31 and the external force detection sensor 32, the circuit portion 4 releasing a latch of the door when the external force detection sensor 32 detects the application of the external force and the entry detection sensor 31 detects the entry of the object.