TECHNICAL MECHANICS
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Home > Journal Issues > No 1 (2021) Technical mechanics > 8
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UDC 621.002.56

Technical mechanics, 2021, 1, 77 - 83

Interprobe distance error compensation in probe measurements of mechanical displacement

DOI: https://doi.org/10.15407/itm2021.01.077

Pylypenko O. V., Doronin . V., Gorev N. B., Kodzhespirova I. F.

      ABOUT THE AUTHORS

Pylypenko O. V.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

Doronin . V.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

Gorev N. B.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

Kodzhespirova I. F.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

      ABSTRACT

      Probe measurements of the displacement of mechanical objects by microwave interferometry are highly attractive in terms of hardware implementation simplicity. At present, the commonly used interprobe distance is one eighth of the guided operating wavelength. Implementing this interprobe distance with a high degree of accuracy may be a challenge, especially in the millimeter-wave band. However, probe methods that use an arbitrary interprobe distance are reported in the literature too. Because of this, the problem may be reduced to determining the actual interprobe distance. This paper presents a simple method for the determination of the actual interprobe distance by electrical measurements with the use of a short-circuiting piston. In this method, the interprobe distance is extracted from the currents of the semiconductor detectors connected to the probes. First, the short-circuiting piston is positioned so that the current of the probe that is farther from piston (the far probe) is a maximum, and the current of the probe that is closer to the piston (the near probe) is measured. Then the short-circuiting piston is moved away from the probes until the current of the far probe becomes equal to the half-sum of its maximum and minimum values, and the current of the near probe is measured again. From these measurements, trigonometric functions whose argument includes the ratio of the interprobe distance to the guided operating wavelength are found. The interprobe distance can be determined unambiguously from these trigonometric functions provided that the interprobe distance accuracy is within one fourth of the guided operating wavelength, which is usually met in actual practice. The method may be used in the manufacturing of microwave displacement sensors
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      KEYWORDS

complex reflection coefficient, displacement, electrical probe, interprobe distance, microwave interferometry, semiconductor detector

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      REFERENCES

1. Viktorov V. A., Lunkin B. V., Sovlukov A. S. Radiowave Measurements of Process Parameters Moscow: Energoatomizdat, 1989. 208 pp. (in Russian).

2. Cunha A., Caetano E. Dynamic measurements on stay cables of stay-cable bridges using an inter-ferometry laser system. Experimental Techniques. 1999. V. 23. No. 3. Pp. 38-43. https://doi.org/10.1111/j.1747-1567.1999.tb01570.x

3. Kaito K., Abe M., Fujino Y. Development of a non-contact scanning vibration measurement system for real-scale. Stricture and Infrastructure Engineering. 2005. V. 1. No. 3. Pp. 189-205. https://doi.org/10.1080/15732470500030661

4. Mehrabi A. B. In-service evaluation of cable-stayed bridges, overview of available methods, and find-ings. Journal of Bridge Engineering. 2006. V. 11. No. 6. Pp. 716-724. https://doi.org/10.1061/(ASCE)1084-0702(2006)11:6(716)

5. Lee J. J., M. Shinozuka. A vision-based system for remote sensing of bridge displacement. NDT & E International. 2006. V. 39. No. 5. Pp. 425-431. https://doi.org/10.1016/j.ndteint.2005.12.003

6. Pieraccini M., Fratini M., Parrini F., Macaluso G., Atzeni C. CW step-frequency coherent radar for dynamic monitoring of civil engineering structures. Electronics Letters. 2004. V. 40. No 14. Pp. 907-908. https://doi.org/10.1049/el:20040549

7. Gentile C. Application of microwave remote sensing to dynamic testing of stay-cables. Remote Sens-ing. 2010. V. 2. No. 1. Pp. 36-51. https://doi.org/10.3390/rs2010036

8. Cripps S. C. VNA tales. IEEE Microwave Magazine. 2007. V. 8. No. 5. Pp. 28-44. https://doi.org/10.1109/MMM.2007.904719

9. Andreev M. V., Drobakhin O. O., Saltykov D. Yu. Techniques of measuring reflectance in free space in the microwave range. Proceedings of the 2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), Kharkiv, Ukraine, June 20-24, 2016. Pp. 1-3. https://doi.org/10.1109/MSMW.2016.7538213

10. Kim S., Nguyen C. A displacement measurement technique using millimeter-wave interferometry. IEEE Transactions on Microwave Theory and Techniques. 2003. V. 51. No. 6. Pp. 1724-1728. https://doi.org/10.1109/TMTT.2003.812575

11. Kim S., Nguyen C. On the development of a multifunction millimeter-wave sensor for displacement sensing and low-velocity measurement. IEEE Transactions on Microwave Theory and Techniques. 2004. V. 52, No. 11. Pp. 2503-2512. https://doi.org/10.1109/TMTT.2004.837153

12. Volkovets A. I., Rudenko D. F., Gusinsky A. V., Kostrikin A. M. Radiowave contactless method for motion and vibration sensing. Trudy BGUIR. 2007. No. 4. Pp. 58-64. (in Russian).

13. Doronin A. V., Gorev N. B., Kodzhespirova I. F., Privalov E. N. A way to improve the accuracy of displacement measurement by a two-probe implementation of microwave interferometry. Progress in Electromagnetics Research M. 2013. V. 30. Pp. 105-116. https://doi.org/10.2528/PIERM13020504

14. Andreev M. V., Drobakhin O. O., Saltykov D. Yu. Complex reflection coefficient determination via digital spectral analysis of multiprobe reflectometer output signals. Proceedings of the 2016 IEEE First Ukraine Conference on Electrical and Computer Engineering (UKRCON). Kyiv, Ukraine, May 29 - June 2, 2017. Pp. 170-175. https://doi.org/10.1109/UKRCON.2017.8100468

15. Pylypenko O. V., Gorev N. B,, Doronin A. V., Kodzhespirova I. F. hase ambiguity resolution in rela-tive displacement measurement by microwave interferometry. Teh. Meh. 2017. No. 2. Pp. 3-11. https://doi.org/10.15407/itm2017.02.003

16. Pylypenko O. V., Doronin A. V., Gorev N. B., Kodzhespirova I. F. Experimental verification of a two-prove implementation of microwave interferometry for displacement measurement. Teh. Meh. 2018. No. 1. Pp. 5-12. https://doi.org/10.15407/itm2018.01.005





Copyright () 2021 Pylypenko O. V., Doronin . V., Gorev N. B., Kodzhespirova I. F.

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