Door Trim Sensor Integration for Window Position Detection
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Solution Overview
Problem
Existing window regulator systems face difficulties in accurately positioning light emitters and receivers on the window frame, leading to complications in assembly and operation.
Innovation Solution
A door trim assembly with transmitters and receivers integrated into the door trim main body, allowing for simplified mounting and accurate detection of a user's fingertip position to control the window regulator, using trigonometry and proximity sensors for reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light emitters and light receivers are attached to the window frame, then the window regulator system can detect fingertip position, but the positioning becomes difficult and assembly becomes complicated
Solution Approach 1:
The light emitter and light receiver are integrated into a single sensor unit that is mounted on the door trim main body, combining the functions of transmission and reception in one component assembly, thereby simplifying the overall structure and reducing assembly complexity while maintaining detection accuracy
2Ease of operation
If light emitters and light receivers are attached to the window frame, then the window regulator system can detect fingertip position, but positioning accuracy deteriorates due to difficulty in adequate positioning
Solution Approach 1:
The door trim main body serves as an intermediary mounting platform that provides a stable and easily accessible location for the sensor unit, facilitating simple installation while ensuring the sensor is positioned at an optimal location for accurate fingertip detection through the window pane
3Reliability
If transmitters and receivers are provided on the upper edge of the door trim main body, then the detection area is limited to the inboard side area, but this enables correct command detection and avoids erroneous operations
Solution Approach 1:
The sensor units are strategically positioned on the upper edge of the door trim main body to create a localized detection zone focused on the inboard side area where the user's fingertip naturally moves, concentrating detection capability where it is most needed for accurate command recognition while avoiding erroneous operations from other areas
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
Facilitates intuitive and accurate control of the window pane movement, minimizing erroneous operations and maintaining a sleek interior appearance, while allowing for potential adjustment of window transmissivity and tint.
Implementation Method 1
at least one receiver (11b, 11b) provided in an upper part of the door trim main body and configured to receive a signal emitted from the transmitter and reflected by an object positioned near the window pane
Implementation Method 2
the position of the object such as the fingertip of the user can be detected by using trigonometry irrespective of the fore and aft position of the object
Implementation Method 3
the transmitter/receiver may consist of an electrode formed by a simple strip of electro-conductive sheet. The principle of detecting the object may be based on that of per se known proximity sensors based on the detection of capacitive changes
Data Source
AI summary
In a door trim assembly for a vehicle door having an opening fitted with a vertically moveable window pane and a drive unit for driving the window pane for selectively closing the opening, the door trim assembly includes: a door trim main body configured to be attached to an inboard side part of the vehicle door under the opening; at least one transmitter provided in an upper part of the door trim main body; at least one receiver provided in an upper part of the door trim main body and configured to receive a signal emitted from the transmitter and reflected by an object positioned near the window pane; and a control unit connected to the receiver to compute a position of the object according to the signal received by the receiver and control the drive unit according to the computed position of the object.