Sealed Sensor Housing Convection Heating for Window Defogging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle sensor systems face challenges with fogging and frosting of windows, which can interfere with the transmission of electromagnetic emissions, leading to diminished sensor accuracy and clarity.
Innovation Solution
The implementation of a sensor system with a sealed housing containing a window for electromagnetic emission transmission, equipped with heaters and convection heating mechanisms, such as fans or moving components, to defog and defrost the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor system housing is sealed to protect internal components, then the reliability of the sensor system is improved, but fogging and frosting of the window occur due to moisture accumulation, deteriorating sensor accuracy
Solution Approach 1:
The heating function is segmented from the main sensor system and implemented as a separate defogging/defrosting system with independent heating elements positioned at the window, allowing the sealed housing to maintain protection while the window receives targeted thermal treatment to prevent condensation
Solution Approach 2:
The local temperature parameter at the window surface is changed by introducing heating elements that raise the window temperature above the dew point, preventing moisture condensation and frosting while maintaining the sealed environment inside the housing
2Measurement precision
If heating elements are added to defog and defrost the window, then sensor accuracy is maintained, but the device complexity increases
Solution Approach 1:
The defogging/defrosting heating elements are merged with the existing sensor system housing structure, utilizing the same enclosure and integration pathways, which minimizes additional complexity by combining functions within a unified system architecture
Solution Approach 2:
The heating elements serve multiple functions: they prevent fogging, prevent frosting, and can potentially serve as part of the thermal management system for the sensor components, reducing the need for separate systems and lowering overall 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
This solution effectively maintains the clarity and accuracy of sensor emissions by preventing fogging and frosting, ensuring continuous and reliable operation of the sensor system, especially in adverse environmental conditions.
Implementation Method 1
heat may be introduced into a sensor system housing that includes a window to be defrosted and/or defogged
Implementation Method 2
heat may be introduced into a sensor system housing that includes a window to be defrosted and/or defogged
Implementation Method 3
The heat may be distributed within the housing via convection
Data Source
AI summary
A system and method to defog and/or defrost a sealed sensor system housing window to improve transmission of an electromagnetic wave through the housing window. The system includes at least a heater provided in a sealed sensor system housing to emit heat into the housing. The heat is then distributed via convection promoted by a moving component of the sensor system, a fan, or a combination of both. Additionally or alternatively, heat may be transferred to the housing window via conduction. A controller can be configured to activate or deactivate the heater based on a determined or predicted state.