Vehicle Dust Sensor Button Cleaner Mechanism
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Solution Overview
Problem
Dust sensors for vehicles face reduced sensing performance due to dust accumulation on the lens, which hinders the detection of scattered light, necessitating an effective cleaning mechanism.
Innovation Solution
A dust sensor design featuring a separate button structure with a spring-loaded cleaner that can be manually activated to contact and remove dust from the lens, utilizing a movable button unit and a replaceable cotton cleaner for efficient cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens surface is left exposed for dust detection, then the sensing performance is maintained, but dust accumulation on the lens reduces sensing performance
Solution Approach 1:
The cleaner is integrated into the dust sensor assembly and automatically performs cleaning function when dust accumulates on the lens, enabling the system to maintain its own sensing performance without external intervention. The cleaner moves along the lens surface and removes dust particles, allowing the system to self-maintain reliability.
Solution Approach 2:
The cleaner is positioned and moved to contact the lens surface before dust accumulation significantly degrades sensing performance. By performing cleaning proactively rather than reactively, the system prevents performance degradation rather than merely restoring it after damage occurs.
2Object-affected harmful factors
If a cleaning mechanism is added to remove dust from the lens, then dust removal capability is improved, but the device complexity increases
Solution Approach 1:
The cleaning function is merged with the existing dust sensor assembly by integrating the cleaner directly into the sensor housing. The cleaner shares the same space and operational cycle as the sensing components, eliminating the need for a separate cleaning device and reducing overall system complexity.
Solution Approach 2:
The button unit serves multiple functions: it acts as both the activation mechanism for the cleaner and potentially as part of the sensor housing structure. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device structure while maintaining effective dust removal capability.
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 allows for easy removal of dust from the lens, maintaining the sensor's performance by ensuring continuous effective light scattering detection and preventing performance degradation.
Implementation Method 1
an elastic member enclosing an outer circumferential surface of the coupling protrusion and configured to provide an elastic force to the up-down movable member to enable the insert member to move upward or downward in the coupling hole
Implementation Method 2
a light receiving unit which senses light scattered by dust
Implementation Method 3
a lens which collects scattered light into the light receiving unit
Data Source
AI summary
A dust sensor includes: a main body in which a dust inlet is formed and including an optical sensor and a lens for collecting light scattered by dust which enters into the main body through the dust inlet; a button unit protruding outwardly from the main body and having one end that is inserted into a coupling hole formed in the main body, wherein the button unit is selectively moved, by a pushing operation of a user, upward and downward with respect to an interior of the main body in which the lens is installed; and a cleaner installed on the one end of the button unit that is inserted into the main body, wherein the cleaner is repeatedly brought into contact with the lens by the upward and downward movement of the button unit.