Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor
Abstract
:1. Introduction
2. Working Principle of Vibrating Wire Strain Gauge
- : Additional strain caused by temperature effect;
- : Linear expansion coefficient (°C−1) of the structural material to be tested;
- : The coefficient of linear expansion (°C−1) of a steel string of a vibrating wire strain gauge;
- : Temperature change amount.
- : The dependent variable of the current time relative to the initial position (10−6);
- : The steel string strain gauge minimum reading 10−6/(kHz2);
- : The Steel string strain gauge current output modulus kHz2;
- : The Steel string strain gauge initial output frequency modulus kHz2;
- : The steel string strain gauge temperature correction factor 10−6 °C;
- : The steel string strain gauge current time temperature value (°C);
- : Temperature value when measuring (°C).
3. Test Plan
4. Analysis of Test Data
- —The strain measurement indication of the i-th measurement, με;
- —The number of measurements.
- —The measured strain measured at the i-th measurement, με;
- —The arithmetic mean of indications of strain measurement, με;
- —number of measurements.
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Content | Value and Unit |
---|---|
Density | 7.85 g/cm3 |
Modulus of elasticity | 210 GPa |
Poisson ratio | 0.269 |
Tensile strength | 600 MPa |
Yield strength | 355 MPa |
Elongation | 16% |
Section shrinkage | 40% |
Impact work | 39 J |
Content | Value and Unit |
---|---|
Half bridge arm | 0.1% accurate resistance is 4.99 KΩ |
Excitation voltage | 1.5 V |
Resolution | 0.002 Ω RMS @ 5 KΩ thermistor |
Accuracy (−55–85 °C) | 0.15% of reading |
Measurement rate | 1 Hz |
Sample Rate (Hz) | Minimum Sensor Frequency (Hz) | Maximum Sensor Frequency (Hz) |
---|---|---|
20 | 290 | 6000 |
50 | 290 | 6000 |
100 | 580 | 6000 |
200b | 1150 | 6000 |
333b | 2300 | 6000 |
Sample Rate (Hz) | Noise Level (Hz RMS) |
---|---|
1 | 0.005 |
20 | 0.008 |
50 | 0.015 |
100 | 0.035 |
200C | 0.11 |
333C | 0.45 |
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Share and Cite
Peng, L.; **g, G.; Luo, Z.; Yuan, X.; Wang, Y.; Zhang, B. Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor. Sensors 2020, 20, 658. https://doi.org/10.3390/s20030658
Peng L, **g G, Luo Z, Yuan X, Wang Y, Zhang B. Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor. Sensors. 2020; 20(3):658. https://doi.org/10.3390/s20030658
Chicago/Turabian StylePeng, Lu, Genqiang **g, Zhu Luo, **n Yuan, Yixu Wang, and Bing Zhang. 2020. "Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor" Sensors 20, no. 3: 658. https://doi.org/10.3390/s20030658