Vibration-Based Surface State Detection for Frozen Roads
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Solution Overview
Problem
Existing methods for determining the surface state of a structure, such as a road or bridge, are limited to specific areas and require multiple sensors, leading to inaccuracies in reflecting the entire surface state, particularly for detecting frozen or snow-covered conditions, which can result in deviations and increased costs for sensor installation and maintenance.
Innovation Solution
An observation system that uses a single sensor to acquire vibration information and calculate the peak vibration frequency of a structure, allowing for the determination of the surface state across a wide area by analyzing the peak vibration frequency's characteristics, including changes over time, to accurately assess frozen or snow-covered states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple sensors are deployed to expand the sensing region, then the coverage area is improved, but the device complexity and maintenance costs increase
Solution Approach 1:
The patent segments the vibration signal into frequency components through Fourier transform, allowing a single sensor to detect characteristics across the entire structure by analyzing frequency spectra rather than requiring multiple spatial sensors
Solution Approach 2:
The patent replaces the mechanical approach of using multiple physical sensors with a signal processing approach, transforming vibration data from the time domain to frequency domain to extract surface state information without additional sensors
2Measurement precision
If multiple sensors are used to cover the entire surface, then the measurement precision is improved, but the loss of time for maintenance increases
Solution Approach 1:
The patent merges the functions of multiple sensors into a single sensor system by combining spatial information across the structure through vibration frequency analysis, achieving comprehensive surface state monitoring with one sensor unit
3Device complexity
If a single sensor is used, then the device complexity is reduced, but the measurement precision deteriorates
Solution Approach 1:
The patent transitions from spatial measurement (multiple sensors at different locations) to frequency domain measurement (single sensor analyzing vibration frequencies), adding a dimensional transformation that enables comprehensive monitoring with minimal hardware
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 approach enables accurate determination of the surface state of an entire structure with a minimal number of sensors, reducing the need for extensive sensor networks and maintenance, while effectively identifying frozen or snow-covered conditions, thereby enhancing safety and reducing costs.
Implementation Method 1
a sensor section set in a structure and configured to detect vibration of the structure
Data Source
AI summary
An observation system includes an information acquiring section configured to acquire sensor information from a sensor section set in a structure and configured to detect vibration of the structure and a processing section configured to calculate information concerning a peak vibration frequency of the vibration on the basis of the sensor information and determine a surface state of the structure on the basis of the information concerning the peak vibration frequency.