PSI - Issue 17

Pavel Steinbauer et al. / Procedia Structural Integrity 17 (2019) 799–805 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

805 7

Fig. 6 Example of windowed measured accelerations on excited pole a and corresponding preprocessed frequency spectrum b

7. Conclusions

The pole health detection method based on eigen frequency shift determination from acceleration measurement only using ambient excitation (mostly coming from the wind or traffic) was developed. The method was tested on acceleration data measured in the field laboratory installation of poles. The smart sensor has been developed. It is equipped with sensitive MEMS accelerometer, carries out long term acceleration series measurement, performs data evaluation based on eigen frequency shift and other quantities and it is also connected into wireless network grid. The pole thus regularly reports its state to central server. Inspection and replacement can be then aimed at problematic areas only. The sensor grid can be easily extend by additional functionality and sensors. The predictive maintenance will be enabled even for relatively low cost devices like lighting poles. The price of the final smart sensor is comparable to the price of additional protective pole coating or painting.

Acknowledgements

The support of TACR Epsilon project #TH02010770 INDIVO and TACR project #TN01000071 National Competence Centre of Mechatronics and Smart Technologies for Mechanical Engineering (MESTEC) are greatly acknowledged.

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