Sensor Module Strengthened Glass Protective Member
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Solution Overview
Problem
The existing resin-based protective members for sensors lack rigidity and scratch resistance, and do not provide excellent weather resistance, making them unsuitable for outdoor use.
Innovation Solution
A sensor module with a protective member made of chemically or physically strengthened glass, featuring a surface compressive stress value of 400 MPa or more and a compressive stress layer depth of 10 μm or more, which provides high rigidity, scratch resistance, and weather resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a resin protective member is used, then the sensor is protected and electric continuity is secured, but the rigidity and scratch resistance are insufficient for outdoor use
Solution Approach 1:
The patent applies chemical strengthening (ion exchange) to the glass protective member, transforming its surface properties by creating compressive stress layers. This parameter change in the glass structure dramatically improves rigidity and scratch resistance while maintaining weather resistance, directly resolving the contradiction between strength and reliability for outdoor sensor protection
Solution Approach 2:
The patent uses a composite structure combining glass protective member with resin sealing material. The glass provides rigidity and scratch resistance, while the resin provides sealing and electrical insulation. This composite approach achieves both high strength and reliable weather protection required for outdoor applications
2Strength
If a resin protective member is used, then the sensor is protected, but the scratch resistance and weather resistance are poor
Solution Approach 1:
The patent applies chemical strengthening (ion exchange) to the glass protective member, transforming its surface properties by creating compressive stress layers. This parameter change in the glass structure dramatically improves rigidity and scratch resistance while maintaining weather resistance, directly resolving the contradiction between strength and reliability for outdoor sensor protection
3Strength
If chemically strengthened glass is used with high surface compressive stress, then rigidity and scratch resistance improve, but manufacturing complexity increases
Solution Approach 1:
The patent applies chemical strengthening (ion exchange) to the glass protective member, transforming its surface properties by creating compressive stress layers. This parameter change in the glass structure dramatically improves rigidity and scratch resistance while maintaining weather resistance, directly resolving the contradiction between strength and reliability for outdoor sensor protection
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 use of strengthened glass as a protective member enhances the sensor module's surface strength, edge strength, and weather resistance, making it suitable for outdoor applications.
Implementation Method 1
a part or whole of the protective member is formed of a strengthened glass and the strengthened glass is a chemically strengthened glass or a physically strengthened glass
Implementation Method 2
the strengthened glass has a surface compressive stress value of 400 MPa or more and a depth of compressive stress layer of 10 μm or more
Data Source
AI summary
A sensor module includes: a base member; at least one of a single or a plurality of sensors and vibrators arranged on the base member; and a protective member constituted of at least one flat surface or a curved surface, provided so as to cover the at least one of the sensors and the vibrators. A part or whole of the protective member is formed of a strengthened glass and the strengthened glass is a chemically strengthened glass or a physically strengthened glass.