Vehicle Power Window Electrode Switch Signal Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power window systems for vehicles can inadvertently close the passenger seat window when the driver operates the main opening/closing device, potentially pressing the passenger's arm due to sequential up and down signals being transmitted, leading to safety issues.
Innovation Solution
The system includes a main opening/closing device with strategically positioned electrodes and a switch that prevents electrical connection between the main center electrode and ground electrodes when the switch moves, ensuring that only intended signals are generated, preventing accidental closure of the passenger seat window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the main opening/closing device and sub opening/closing device are both electrically connected to one controller, then the driver can control the passenger seat window using the main device and the passenger can control it using the sub device, but sequential up and down signals may be transmitted causing the window to close completely and press the passenger's arm
Solution Approach 1:
A signal processing unit is introduced as an intermediary between the controller and the window motor. This intermediary detects sequential up and down signals from either the main or sub opening/closing device and blocks the harmful complete closure operation, thereby preventing the window from pressing the passenger's arm while preserving the dual-control functionality
Solution Approach 2:
The signal processing unit monitors the sequence of signals received from the opening/closing devices and provides feedback control by identifying harmful sequential patterns (up followed by down or vice versa). When such patterns are detected, the system intervenes to prevent the dangerous complete closure, thus resolving the contradiction between versatile control and safety
2Ease of operation
If the main switch moves to contact selected main electrodes, then up-signal or down-signal can be output, but electrical connection between main center electrode and ground electrodes may occur causing unintended signals
Solution Approach 1:
The electrode system is segmented into distinct functional groups: main center electrode, multiple ground electrodes, and up/down signal electrodes. The main switch is designed to contact only the intended electrodes during normal operation, with physical separation preventing accidental contact between the main center electrode and ground electrodes, thereby ensuring signal accuracy while maintaining operational ease
Solution Approach 2:
The harmful electrical connection path between the main center electrode and ground electrodes is extracted or removed from the circuit design. By strategically positioning the main center electrode and ground electrodes so they cannot be simultaneously contacted by the moving main switch, the patent eliminates the possibility of unintended signal generation while preserving the intended up/down signal output capability
Data Source
AI summary
A system for safely opening/closing a power window of a vehicle includes a main opening/closing device provided adjacent to a driver seat so as to open and close a window of a passenger seat. A sub opening/closing device is provided adjacent to a passenger seat so as to open and close a window of a passenger seat. A plurality of main electrodes of the main opening/closing device includes at least one main ground electrode for generating a signal. A main center electrode is electrically connected to a sub opening/closing device and to at least one main ground electrode by a main switch, and is disposed on a portion of a main plate to be prevented from being electrically connected to a main ground electrode when a main switch moves.