Optical Sensor Housing with Quick-Lock Flanges and Self-Cleaning Coatings
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Solution Overview
Problem
Optical sensors in outdoor environments face reliability issues due to susceptibility to blockage and fouling by dirt, debris, and moisture, which degrades their performance in poorly lit or dirty conditions, particularly when used in autonomous device navigation.
Innovation Solution
A sensor housing with a quick-lock mechanism and hydrophobic/hydrophilic coatings on the optical window, along with a design that includes integrally molded compliant flanges and longitudinal ridges, allows for tool-free access and self-cleaning, reducing the accumulation of debris and moisture, and features a unitary construction for enhanced sealing and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the optical sensor is located close to the ground for autonomous device navigation, then cost and performance considerations are satisfied, but the sensor becomes susceptible to blockage or fouling by dirt, debris, and moisture
Solution Approach 1:
The housing is divided into a body and a removable cover that can be separated without tools. This segmentation allows the sensor to remain in its optimal low position for navigation while the cover can be easily removed for cleaning, thus maintaining both productivity and reliability
Solution Approach 2:
The hydrophobic/hydrophilic coatings on the optical window enable self-cleaning by causing moisture and contaminants to bead up and roll off. This self-service mechanism reduces fouling accumulation without requiring frequent manual intervention, maintaining sensor reliability
2Object-affected harmful factors
If a traditional sealed housing is used to protect the optical sensor, then protection from environmental factors is improved, but access for cleaning and maintenance requires tools and disassembly
Solution Approach 1:
The housing is segmented into a body and a removable cover connected by compliant flanges. This allows the cover to be easily detached for cleaning access while maintaining protection when closed, resolving the contradiction between sealed protection and easy access
Solution Approach 2:
The compliant flanges provide a dynamic sealing solution that maintains protection when closed but allows easy opening without tools. The flexible nature of the flanges enables simple manual operation while preserving environmental protection during normal operation
3Reliability
If the housing uses multiple fasteners and complex sealing mechanisms to ensure protection, then sealing reliability is improved, but device complexity and assembly time increase
Solution Approach 1:
Multiple sealing and fastening functions are merged into the integrally molded compliant flanges. This single component provides both sealing and mechanical attachment, reducing the number of parts and simplifying the overall housing structure while maintaining reliable protection
Solution Approach 2:
The compliant flanges are made from elastomeric material that combines sealing properties with mechanical flexibility. This composite approach provides reliable sealing without requiring additional separate sealing components, reducing complexity
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
The solution enhances the reliability and accuracy of optical sensors by minimizing blockages and fouling, enabling effective operation in various environmental conditions without the need for tools or additional fasteners, thus maintaining performance in challenging outdoor scenarios.
Implementation Method 1
one or more integrally molded compliant flanges configured to engage the one or more sensor housing body engaging parts and to removably secure the sensor housing cover to the sensor housing body
Implementation Method 2
hydrophobic/hydrophilic coatings on the optical window
Implementation Method 3
hydrophobic/hydrophilic coatings on the optical window
Data Source
AI summary
An optical sensor housing includes a sensor housing body including an enclosure wall upstanding from a bottom portion and a substantially open top portion defining a cavity in which the optical sensor assembly is located, one or more apertures, and one or more engaging parts projecting orthogonally from an outside surface of the sensor housing body, a sensor housing cover including an open central portion, one or more integrally molded compliant flanges configured to engage the sensor housing body engaging part and to secure the sensor housing cover to the sensor housing body, and longitudinal ridges extending outwardly and disposed substantially along the length of the sensor housing cover. The sensor housing engaging parts and flanges can provide a quick-lock mechanism operable to secure the sensor housing cover to the sensor housing body without the use of tools or fasteners.