Vehicle Door Handle Contact Sequencing for False Trigger Prevention
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Solution Overview
Problem
Existing door opening/closing systems in vehicles suffer from erroneous detection of user operations due to unintentional contact by the user's or another person's arm, leading to unreliable operation.
Innovation Solution
A door opening/closing device with an operation handle equipped with electrostatic capacitance sensors that detect a swipe operation followed by a tap operation, allowing the control unit to differentiate between intentional user operations and accidental contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an electrostatic capacitance sensor is used to detect contact with the operation handle, then the door can be opened automatically when a user approaches or touches the handle, but erroneous detection occurs when arms or objects unintentionally touch the handle
Solution Approach 1:
The operation handle is divided into multiple detection regions with different electrostatic capacitance sensors arranged along its shape. Each sensor monitors a specific segment, allowing the system to distinguish between intentional user operations (affecting specific patterns) and accidental contacts (affecting different patterns), thereby resolving the contradiction between ease of operation and detection accuracy
Solution Approach 2:
The control unit analyzes the pattern and sequence of capacitance changes from multiple sensors to determine whether contact is intentional. By evaluating the spatial distribution and temporal sequence of detected contacts, the system provides feedback-based discrimination between valid user operations and erroneous detections, maintaining both ease of operation and reliability
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
This solution effectively suppresses erroneous detection of user operations, providing a highly reliable door opening/closing system by requiring a two-step operation that includes a swipe and a tap, thus distinguishing between intentional and accidental contacts.
Implementation Method 1
An electrostatic capacitance sensor is mounted on the operation handle to detect a human body that comes into contact with or approaches the operation handle by utilizing a change in electrostatic capacitance.
Data Source
AI summary
A door opening/closing device includes an operation handle, a detection unit provided in the operation handle and configured to detect a contact state of a user with the operation handle, a door driving unit configured to open or close a door, and a control unit. The control unit is configured to determine that a first operation involving a direction is a user operation in which a user comes into contact with the operation handle, when the detection unit detects the first operation and a second operation. The control unit is configured to control the door driving unit and open or close the door based on the user operation.