Vehicle Sensor Cover Heating Using Wall Thickness Feedback
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Solution Overview
Problem
Existing heating solutions for radar sensors in vehicles can lead to overheating of wire and connector regions due to unnecessary activation based on exterior temperature and speed, even if there is no icing or snow, which can cause damage and impair sensor detection quality.
Innovation Solution
A sensor device with a wall thickness sensor that measures changes in the cover's thickness to control a heating element, ensuring it only heats when necessary, using an open-loop or closed-loop control unit, and incorporating temperature and other environmental sensors for precise activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating element is activated based on exterior temperature and speed, then sensor cover is heated to prevent icing, but wire and connector regions overheat causing damage
Solution Approach 1:
The system uses a wall thickness sensor to continuously monitor the thickness of the sensor cover and provides feedback to the control unit. The control unit activates the heating element only when the wall thickness exceeds a predefined threshold, indicating the presence of ice or snow. This feedback mechanism ensures heating is applied only when necessary, preventing overheating damage while maintaining sensor detection quality.
Solution Approach 2:
The wall thickness sensor detects changes in cover thickness before significant icing occurs, allowing the system to activate heating elements in advance. This preliminary action prevents ice accumulation that would affect sensor performance while avoiding unnecessary heating that could cause overheating damage to wires and connectors.
2Reliability
If heating element is continuously activated to prevent icing, then sensor detection quality is maintained, but energy is wasted and components are damaged
Solution Approach 1:
The control unit receives continuous feedback from the wall thickness sensor about the actual state of the sensor cover. Heating is activated only when the sensor detects that wall thickness has increased beyond the predefined threshold, indicating ice or snow presence. This eliminates energy waste by ensuring heating operates only when necessary for maintaining sensor detection quality.
Solution Approach 2:
The system uses the wall thickness sensor to autonomously determine when heating is required, eliminating the need for continuous external control or monitoring. The sensor itself provides the intelligence needed to activate heating only under appropriate conditions, preventing energy waste while maintaining detection quality.
3Loss of energy
If wall thickness sensor is added to detect icing condition, then heating is activated only when necessary, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical or manual monitoring methods with an electronic wall thickness sensor and automated control unit. The sensor electronically detects changes in cover thickness and the control unit automatically processes this information to activate heating, simplifying the overall system while improving energy efficiency compared to manual or mechanical monitoring approaches.
Solution Approach 2:
The control unit serves multiple functions: it receives data from the wall thickness sensor, processes this information against predefined thresholds, activates the heating element when necessary, and monitors the heating process. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while achieving energy-efficient heating control.
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
Prevents overheating and ensures optimal sensor detection by heating only when ice or snow is present, maintaining sensor quality and reducing the risk of damage to heating elements.
Implementation Method 1
at least one wall thickness sensor, which is in a form, and arranged at a predefined distance from and/or in direct contact with and/or inside the cover, such that it may ascertain the wall thickness of the cover
Implementation Method 2
at least one heating element, which is arranged and configured to heat at least subregions of the cover
Data Source
AI summary
A sensor device for use in vehicles is provided, having at least one sensor unit, which is configured to cover a detection area outside the sensor device, and at least one cover, which is arranged in front of the sensor unit or is formed as part of the sensor unit, and at least one heating element, which is arranged and configured to heat at least subregions of the cover, and also a control or regulating unit, which is configured to control or regulate the heating element in order to heat the cover. The sensor device is characterized by at least one wall thickness sensor that is formed, and arranged at a predefined distance from and/or in direct contact with and/or inside the cover, in such a way that it is able to determine the wall thickness of the cover, wherein it transmits the determined wall thickness to the control or regulating unit, which actuates the heating element in order to heat the cover if a predefined wall thickness is exceeded.