Wiper Arm Speed Control for Imaging Visibility Recovery
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Solution Overview
Problem
Existing wiper washer apparatuses temporarily impair imaging device visibility due to residual washer liquid after spraying, as they do not efficiently clear the windshield in time for the imaging device to recover.
Innovation Solution
A wiper washer apparatus with a wiper arm that can switch between low and high speed modes, where the arm is driven in high speed mode after spraying to quickly clear any remaining liquid and in low speed mode during spraying to ensure effective distribution of washer liquid across the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the wiper arm performs multiple wiping operations at normal speed to clear residual washer liquid, then the washer liquid is effectively removed from the windshield, but the imaging device visibility is impaired for a longer duration
Solution Approach 1:
The wiper arm operates at two different speeds: normal speed during the first wiping operation to effectively remove most washer liquid, and high speed during the second wiping operation to quickly clear residual liquid. This dynamic speed adjustment resolves the contradiction by optimizing wiping effectiveness first, then prioritizing rapid visibility recovery.
Solution Approach 2:
The wiping operation is divided into two distinct phases: a first periodic wiping action at normal speed followed by a second periodic wiping action at high speed. This periodic structure allows the system to address residual liquid removal and visibility recovery as separate stages, minimizing overall imaging device impairment.
2Loss of time
If the wiper arm operates at high speed continuously, then the visibility recovery is faster, but the washer liquid distribution and wiping effectiveness is reduced
Solution Approach 1:
The first wiping operation at normal speed is performed as a preliminary action to distribute and remove the majority of washer liquid from the windshield. This preliminary wiping creates optimal conditions for the subsequent high-speed wiping, ensuring that the imaging device benefits from rapid visibility recovery without compromising overall wiping effectiveness.
Solution Approach 2:
The system dynamically adjusts wiper arm speed based on the wiping stage: normal speed during the first operation to ensure proper washer liquid distribution and removal, then transitions to high speed during the second operation to rapidly clear residuals and restore visibility. This dynamic adaptation resolves the contradiction between wiping quality and speed.
Data Source
AI summary
A wiper washer apparatus sprays a washer liquid onto a windshield of a vehicle that has imaging areas of an imaging device and wipes the windshield. The apparatus includes a wiper arm that reciprocates a blade so as to wipe a predetermined wiping area, a spray unit that sprays the washer liquid onto the wiping area on the windshield from a nozzle provided on the wiper arm, a drive unit that drives the wiper arm in a mode selected from modes including at least a low speed mode and a high speed mode, and an input unit through which a user inputs a command for spraying the washer liquid.