Vehicle Sensor Detecting Road Salt via Moisture Conductivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for detecting moisture on roads, particularly from melted ice, struggle to accurately differentiate between moisture from melted ice and normal rainwater, leading to challenges in pre-conditioning vehicle safety systems and issuing timely warnings.
Innovation Solution
A method utilizing a sensor apparatus on a vehicle to capture physical parameters such as electrical conductivity and capacitance of the moisture thrown up by the wheels, which allows for the determination of salt content, indicating whether the moisture originates from melted ice due to de-icing salt usage, and correlating these parameters with travel speed to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sound sensors are used to detect moisture on the road, then moisture detection capability is improved, but the ability to differentiate between melted ice moisture and rainwater remains insufficient
Solution Approach 1:
The patent combines sound sensors with additional sensor devices that can detect physical parameters such as electrical conductivity or capacitance of the moisture. By merging multiple sensing capabilities into one integrated system, the solution achieves both moisture detection and salt content determination, resolving the contradiction between detection capability and information completeness.
Solution Approach 2:
The sensor apparatus is designed to perform multiple functions: detecting moisture presence through sound sensors and simultaneously determining salt content through additional sensor devices. This multi-functional approach allows the system to differentiate between various moisture sources (melted ice vs. rainwater) while maintaining comprehensive detection capability.
2Device complexity
If only sound signals are captured to detect moisture, then device complexity is reduced, but the reliability of detecting melted ice conditions deteriorates
Solution Approach 1:
The patent introduces additional measurement parameters (electrical conductivity or capacitance) beyond simple sound detection. By monitoring changes in these physical parameters of the moisture, the system can reliably identify melted ice conditions without excessively increasing device complexity, as the additional sensors share the same mounting structure and evaluation platform.
3Measurement precision
If physical parameters of moisture are captured to determine salt content, then detection precision of melted ice is improved, but device complexity increases
Solution Approach 1:
The sensor apparatus is segmented into distinct functional modules: sound sensors for moisture detection and additional sensor devices for physical parameter measurement. This segmentation allows each component to perform its specific function efficiently while maintaining overall system manageability and reducing the complexity burden of the integrated system.
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
Enables precise detection of moisture from melted ice, allowing for timely warnings and pre-conditioning of vehicle safety systems, thereby improving driving safety by distinguishing between hazardous icy conditions and normal wet road conditions.
Implementation Method 1
at least one sensor device for capturing at least one physical parameter of the thrown up moisture... a conclusion is reached regarding the salt content of the moisture which reaches the sensor apparatus on the basis of at least one captured physical parameter
Implementation Method 2
The salt content of water also has an effect on the electrical capacitance of the water
Data Source
AI summary
In a method for capturing a condition of a surface of a road on which a vehicle is travelling, wherein at least one signal produced as a result of moisture thrown up from the road is captured by means of at least one sensor apparatus arranged on the vehicle, wherein the sensor apparatus includes at least one sensor device, and wherein the captured signal is evaluated by means of at least one evaluation device attached to the vehicle, it is provided as essential to the invention that at least one physical parameter of the thrown up moisture is captured by at least one sensor device, and that a conclusion is reached regarding the salt content of the moisture which reaches the sensor apparatus on the basis of at least one captured physical parameter, and a conclusion is reached regarding the condition of the road based on the salt content. The invention relates further to a sensor apparatus for a vehicle for capturing a condition of a surface of a road on which a vehicle is travelling having at least one sensor apparatus for detecting moisture thrown up by the vehicle tyres.