Borosilicate Vehicle Glass for Sensor Reliability
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Solution Overview
Problem
Vehicle glass, particularly mineral glass, is sensitive to mechanical stress from particles like grit, which can cause damage and lead to reduced image quality and sensor failure due to scattered light, especially in situations with bright and dark areas, compromising the reliability of optical sensors in vehicles.
Innovation Solution
A vehicle glass sheet made of borosilicate glass with a specific composition and thickness, featuring a two-dimensional area for sensors inclined between 35° and 65° relative to the vehicle's upward direction, which reduces scattered light and enhances long-term operational stability even after damage, by incorporating a borosilicate glass composition with optimized boron and aluminum oxide content to form boroxole rings that absorb forces without breaking bonds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional motor vehicle glass is used, then manufacturing cost and ease of manufacture are maintained, but the glass is sensitive to mechanical stress from particles like grit, causing damage and scattered light that reduces sensor reliability
Solution Approach 1:
The patent changes the chemical composition parameters of the glass by incorporating borosilicate glass with specific ratios of boron oxide (10-25 wt%) and aluminum oxide (5-15 wt%), which fundamentally alters the glass network structure to form boroxole rings that provide superior mechanical stress resistance compared to conventional glass
Solution Approach 2:
The patent creates a composite glass material by combining borosilicate glass with specific additives including tungsten oxide (0.1-5 wt%) and zinc oxide (0.1-5 wt%), forming a multi-component composite that enhances both mechanical strength and optical properties for sensor protection
2Reliability
If the glass surface is damaged by particles, then scattered light increases and image quality deteriorates, but using more durable glass increases manufacturing complexity
Solution Approach 1:
The patent optimizes specific compositional parameters within defined ranges (boron oxide 10-25 wt%, aluminum oxide 5-15 wt%, silica 60-75 wt%) to achieve the desired balance between durability and manufacturability, allowing standard glass manufacturing processes to be used while obtaining enhanced performance
Solution Approach 2:
The patent incorporates protective measures in advance by designing the glass composition with built-in damage resistance features, including the boroxole ring structure that absorbs impact energy, preventing damage before it occurs rather than attempting to repair it later
3Measurement precision
If optical sensors are positioned directly behind the windshield for optimal sensing, then sensor accuracy is improved, but scattered light from surface damage directly affects the sensor, reducing image quality
Solution Approach 1:
The patent uses composite borosilicate glass with specific additives like tungsten oxide and zinc oxide that provide both mechanical durability and optimized optical properties, reducing light scattering while maintaining sensor visibility and measurement accuracy
Solution Approach 2:
The patent modifies the optical parameters of the glass by adjusting the composition ratios of various oxides, which changes the refractive index and light scattering characteristics to minimize interference with optical sensors positioned behind the windshield
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 borosilicate glass sheet effectively minimizes scattered light and maintains high image quality and sensor reliability, even under mechanical stress, by forming a layered structure that absorbs forces and reduces brittleness, thus providing improved stone impact resistance and alkali resistance for long-term durability.
Implementation Method 1
incorporating a borosilicate glass composition with optimized boron and aluminum oxide content to form boroxole rings that absorb forces without breaking bonds
Implementation Method 2
an inclination α of at least this two-dimensional area with respect to an upward direction S perpendicular to a main direction of movement V of the vehicle... which reduces scattered light
Data Source
AI summary
A vehicle glass sheet is provided that includes a borosilicate glass with a thickness between 1.1 mm and 5.4 mm and a two-dimensional area for a sensor assigned to this two-dimensional area. The two-dimensional area has an inclination (α) with respect to an upward direction (S) perpendicular to a main direction of movement (V) of the vehicle that is in a range between 35° and 65°.