Vehicle Wiper Control via Voltage-Speed Feedback
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Solution Overview
Problem
Vehicle wipers often operate without being in close contact with the windshield glass during maintenance or cleaning, leading to damage to the wiper blade and the vehicle's hood due to lack of control mechanisms.
Innovation Solution
A device and method that utilize a wiper actuator, sensor, and controller to detect the relationship between driving voltage and speed to determine if the wiper blade is in contact with the windshield glass, stopping operation and warning the user if not in contact, thereby preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wiper is operated without contact detection, then the operation is simple and easy to use, but the wiper blade and hood may be damaged due to operation without contact with the windshield glass
Solution Approach 1:
The patent implements a feedback mechanism by detecting the relationship between driving voltage and driving speed to determine whether the wiper blade is in contact with the windshield glass. The controller monitors this contact state and provides feedback to control the wiper motor, stopping operation when contact is not detected, thereby preventing damage while maintaining operational simplicity.
Solution Approach 2:
The patent replaces complex mechanical contact detection mechanisms with an electrical detection system that monitors the relationship between driving voltage and driving speed. This substitution maintains ease of operation while enabling reliable contact detection to prevent damage to the wiper blade and hood.
2Reliability
If a contact detection mechanism is added, then the safety and reliability are improved, but the device complexity increases
Solution Approach 1:
The patent makes the controller perform multiple functions: it not only controls the wiper motor operation but also detects the contact state between the wiper blade and windshield glass by monitoring the relationship between driving voltage and driving speed. This multi-functionality reduces the need for separate detection devices, thereby limiting the increase in device complexity while improving safety.
Solution Approach 2:
The detection system utilizes the existing driving voltage and speed parameters that are already measured for wiper control. By using these existing measurements to also determine contact state, the system achieves safety improvement without requiring additional sensors or complex detection hardware.
3Reliability
If the wiper operation is stopped frequently for contact verification, then the damage prevention is improved, but the productivity and convenience are reduced
Solution Approach 1:
The patent maintains continuous monitoring of the contact state through ongoing detection of the relationship between driving voltage and driving speed. This continuous verification allows the system to maintain wiper operation without interruption when contact is proper, while only stopping when contact is lost, thereby preserving productivity while preventing damage.
Solution Approach 2:
The continuous feedback mechanism monitors contact state in real-time during wiper operation. When contact is detected, operation continues uninterrupted; when contact is lost, operation stops to prevent damage. This approach minimizes interruptions to productive operation while maintaining reliable damage prevention.
Data Source
AI summary
A device and a method for controlling a wiper of a vehicle. The device may include a wiper actuator for driving the wiper of the vehicle, a sensor for measuring a driving speed of the wiper, and a controller that controls the wiper of the vehicle based on a relationship between a driving voltage applied to the wiper actuator and the driving speed measured by the sensor.