Bridge Vehicle Detection Using Single Acceleration Sensor
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Solution Overview
Problem
Existing measurement systems for detecting vehicle movement on bridges require multiple sensors, leading to high costs and significant installation efforts.
Innovation Solution
A measurement instrument comprising an acceleration sensor that acquires both width-direction and vertical-direction accelerations, allowing for the computation of vertical displacement and correlation between these accelerations to detect movement, thereby reducing the need for multiple sensors and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors for speed detection and wheel axis detection are installed along running paths, then measurement precision is improved, but device complexity and installation costs increase
Solution Approach 1:
The patent combines multiple sensor functions into a single acceleration sensor that simultaneously detects width-direction acceleration and vertical-direction acceleration. This merging of detection functions eliminates the need for separate speed detection sensors and wheel axis detection sensors, reducing the total number of sensors while maintaining comprehensive vehicle movement detection capability
Solution Approach 2:
The acceleration sensor is designed to perform multiple detection functions universally. By detecting acceleration in both width-direction and vertical-direction, a single sensor can infer speed information, wheel axis positions, and vehicle movement characteristics that previously required multiple specialized sensors,从而实现一 sensor 多用
2Area of stationary object
If multiple sensors are installed along running paths at predetermined intervals, then measurement coverage is improved, but installation efforts and costs increase
Solution Approach 1:
The patent merges multiple sensor installation points into a single acceleration sensor installation location. The sensor is positioned to detect vibrations from vehicles passing through different lanes and positions, eliminating the need to install sensors at multiple predetermined intervals along the running path while still achieving comprehensive measurement coverage
Solution Approach 2:
The patent segments the detection function by direction rather than by location. Instead of installing sensors at multiple locations to cover different areas, the system segments acceleration detection into width-direction and vertical-direction components at a single location, using directional acceleration data to infer vehicle position and movement throughout the measurement area
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 effectively detects and analyzes vehicle movement on bridges using a single acceleration sensor, reducing costs and installation efforts while maintaining accurate detection and analysis capabilities.
Implementation Method 1
an acceleration sensor that acquires both width-direction and vertical-direction accelerations
Implementation Method 2
the computation of vertical displacement and correlation between these accelerations to detect movement
Data Source
AI summary
An acquisition unit acquires the width-direction acceleration and the vertical-direction acceleration of a surface of a structure on which a moving object moves from an acceleration sensor provided in the structure on which the moving object moves. A displacement computation unit computes the vertical-direction displacement of the structure on the basis of the vertical-direction acceleration. A correlation determination unit determines the correlation between the width-direction acceleration and the vertical-direction displacement. A movement detection unit detects the movement of the moving object on the structure on the basis of the correlation.