Load Meter Calibration via Road Displacement Histograms
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Solution Overview
Problem
Conventional load meter calibration methods require a vehicle with known axle load to pass over the road, incurring significant labor and cost.
Innovation Solution
A calibration device comprising a detector and calibrator that measures displacement caused by a vehicle's load on the road, generating a histogram to update displacement coefficients for accurate load calculation, allowing calibration using ordinary vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated vehicle with known axle load is used for calibration, then measurement precision is improved, but labor and cost increase
Solution Approach 1:
The system uses ordinary vehicles that naturally pass over the road to perform calibration. The vehicle itself serves as the calibration object without requiring specialized calibration vehicles. The detector automatically detects displacement caused by passing vehicles and the calibrator automatically updates coefficients, making the system self-calibrating using regular traffic.
Solution Approach 2:
The invention replaces expensive dedicated calibration vehicles with ordinary vehicles that are already available on the road. Instead of investing in specialized equipment, the system uses commonly available vehicles whose displacement data can be collected and used for calibration purposes.
2Measurement precision
If frequent calibration is performed, then measurement precision is maintained, but labor and cost accumulate
Solution Approach 1:
The calibration process becomes continuous rather than periodic. As vehicles continuously pass over the road, the detector continuously collects displacement data and the calibrator continuously updates the displacement coefficient. This ongoing calibration maintains measurement precision without requiring scheduled calibration events that consume time and resources.
Solution Approach 2:
The system performs automatic self-calibration using passing vehicles without requiring human intervention for scheduling, preparation, or execution of calibration events. This eliminates the time and labor associated with manual calibration scheduling and execution while maintaining continuous measurement accuracy.
Data Source
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AI summary
Calibration device (300) is a calibration device configured to calibrate load meter (200) that measures a load of a vehicle. Calibration device (300) includes detector (260) and calibrator (250). Detector (260) detects a displacement amount corresponding to displacement caused on a road by the load of the vehicle. Calibrator (250) aggregates the displacement amounts detected by detector (260) to generate a histogram of the displacement amounts, and updates a displacement coefficient for calculating the load of the vehicle based on a shape of the histogram.