Electromagnetic Wave Sensor Cover With Uniform Heating And Low Reflection
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Solution Overview
Problem
Existing infrared sensor covers are inefficient in evenly heating and limiting electromagnetic wave reflection, leading to reduced detection accuracy due to ice and snow adhesion.
Innovation Solution
An electromagnetic wave sensor cover with a laminated structure of a base layer, metal oxide layer, and low refractive index layer, combined with electrodes to generate heat and minimize reflection, ensuring even heating and effective electromagnetic wave transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a heater wire is arranged in a serpentine manner at a predetermined pitch, then the infrared sensor cover can melt ice and snow, but the cover is not evenly heated due to temperature differences between portions with and without the heater wire
Solution Approach 1:
The patent extracts the heating function from a serpentine heater wire and implements it through a transparent conductive layer that provides uniform heating across the entire cover surface. This eliminates the temperature differences caused by the serpentine wire arrangement while maintaining the anti-icing function.
Solution Approach 2:
The transparent conductive layer is applied uniformly across the infrared sensor cover, ensuring homogeneous heating distribution. This replaces the non-uniform heating from serpentine wires with a homogeneous heating pattern that eliminates temperature differences between different portions of the cover.
2Measurement precision
If an anti-reflection coating layer is added to limit infrared ray reflection, then detection accuracy is maintained, but the device structure becomes more complex
Solution Approach 1:
The patent combines the anti-reflection coating function with the transparent conductive layer into a single integrated structure. This merging eliminates the need for separate anti-reflection coating layers while maintaining the ability to limit infrared ray reflection and preserve detection accuracy.
Solution Approach 2:
The transparent conductive layer serves multiple functions simultaneously: it provides uniform heating to prevent ice and snow adhesion, maintains optical transparency for infrared transmission, and limits infrared ray reflection. This multi-functionality reduces overall device complexity by replacing multiple separate components with a single versatile layer.
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 cover efficiently melts ice and snow while maintaining detection accuracy by evenly heating and reducing electromagnetic wave reflection, enhancing the infrared sensor's performance in snowy conditions.
Implementation Method 1
two electrodes disposed in contact with the metal oxide layer to energize the metal oxide layer so that the metal oxide layer generates heat
Implementation Method 2
one or more low refractive index layers permitting passage of the electromagnetic wave and made of material that has a lower refractive index than material of the metal oxide layer
Data Source
AI summary
An electromagnetic wave sensor cover includes a cover body. The cover body includes a base layer made of synthetic resin and permitting passage of an electromagnetic wave, one or more metal oxide layers permitting passage of the electromagnetic wave and being conductive, one or more low refractive index layers permitting passage of the electromagnetic wave and made of material that has a lower refractive index than material of the metal oxide layer, and two electrodes. The base layer includes a front surface and a rear surface in a transmission direction of the electromagnetic wave. The metal oxide layer and the low refractive index layer are laminated adjacent to each other in the transmission direction. A laminate of the metal oxide layer and the low refractive index layer is laminated on the front surface or the rear surface of the base layer.