Development and Temperature Correction of Piezoelectric Ceramic Sensor for Traffic Weighing-In-Motion
Hailu Yang1, Yue Yang1, Guanyi Zhao1
1National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China.
Sensors (Basel, Switzerland)
|May 13, 2023
Summary
A new Weighing-In-Motion (WIM) sensor using PZT-5H piezoelectric ceramic was developed. Temperature compensation using a nonlinear fitting algorithm significantly improved sensor stability for road pavement management.
Area of Science:
- Materials Science
- Civil Engineering
- Sensor Technology
Background:
- Weighing-In-Motion (WIM) systems are crucial for effective pavement management and minimizing vehicle overload issues.
- WIM sensors are the critical components, requiring stable performance across varying environmental temperatures.
Purpose of the Study:
- To develop a novel WIM sensor utilizing PZT-5H piezoelectric ceramic with integrated temperature sensing.
- To evaluate the sensor's performance, including its linearity, sensitivity, and frequency independence.
- To implement a temperature compensation strategy to enhance sensor stability under diverse thermal conditions.
Main Methods:
- A PZT-5H piezoelectric ceramic WIM sensor with an integrated temperature probe was designed and fabricated.
- Sine loading tests involving amplitude and frequency scanning were conducted to assess basic sensor performance.
- A multivariate nonlinear fitting algorithm was employed for temperature compensation of the sensor's output.
Main Results:
- The developed WIM sensor demonstrated a strong linear relationship between load and output voltage (R² up to 0.999) at room temperature.
- The sensor exhibited good frequency-independent characteristics with a sensitivity of 4.04858 mV/N at 2 Hz.
- Temperature compensation using the nonlinear fitting algorithm achieved a fitting result R² of 0.9686 and an RMSE of 0.2497, confirming successful stabilization.
Conclusions:
- The developed piezoelectric ceramic WIM sensor offers advantages such as small size, simple structure, high sensitivity, and low cost.
- Temperature compensation is essential for stabilizing the piezoelectric sensor's output, enabling reliable performance in road WIM applications.
- This research provides a foundation for the practical application of advanced piezoelectric sensors in intelligent transportation and pavement management systems.
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