TECHNICAL MECHANICS
ISSN (Print): 1561-9184, ISSN (Online): 2616-6380

English
Russian
Ukrainian
Home > Journal Issues > 3 (2018) Technical mechanics > 11
___________________________________________________

UDC 621.002.56

Technical mechanics, 2018, 3, 138 - 150

TWO-PROBE IMPLEMENTATION OF MICROWAVE INTERFEROMETRY FOR MOTION SENSING AND COMPLEX REFLECTION COEFFICIENT MEASUREMENT

DOI: https://doi.org/10.15407/itm2018.03.138

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

      ABOUT THE AUTHORS

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

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

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

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

      ABSTRACT

      This paper presents the results of the investigations into microwave probe measurements conducted at the Department for Functional Elements of Control Systems of the Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine over the past five years. These investiga-tions resulted in a two-probe implementation of microwave interferometry that allows one to measure both the displacement of a mechanical object and the complex reflection coefficient of a material specimen. Reducing the number of probes from three (the conventional case) to two simplifies the design and manufacture of the wave-guide section and alleviates the problem of interprobe interference. The possibility of using as few as two probes is demonstrated by analyzing the roots of the equation that relates the magnitude of the unknown complex reflec-tion coefficient to the currents of the semiconductor detectors connected to the probes. The analysis shows that, theoretically, the displacement is determined exactly for reflection coefficient magnitudes no greater than the inverse of the square root of two and to a worst-case accuracy of about 4.4 % of the free-space operating wave-length in the general case and gives conditions under which the complex reflection coefficient is unambiguously determined from the detector currents. As shown by experiments, at an operating wavelength of 3 cm, a target double amplitude of 10 cm and 15 cm, and a target vibration frequency of about 2 Hz the proposed displacement measurement method allows one to determine the instantaneous target displacement with a maximum error of about 3 mm and an average error of about 1 mm without any preprocessing of the measured data, such as filter-ing, smoothing, etc. The results presented in this paper may be used in the development of microwave displace-ment sensors and vector reflectometers. Pdf (English)







      KEYWORDS

complex reflection coefficient, displacement, electrical probe, microwave interferometry, semiconductor detector, waveguide section

      FULL TEXT:

Pdf (English)









      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., E. Caetano Dynamic measurements on stay cables of stay-cable bridges using an interferometry 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 structures. Structure 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 findings. 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., Shinozuka M. 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 Sensing. 2010. V. 2. No. 1. Pp. 36-51. https://doi.org/10.3390/rs2010036

8. 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

9. 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

10. Tischer F. J. Mikrowellen-Messtechnik. Berlin: Springer-Verlag, 1958. 368 pp. https://doi.org/10.1007/978-3-642-87504-5

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

12. Pylypenko O. V., Gorev N. B., Doronin A. V., Kodzhespirova I. F., Privalov E. N. wo-probe implementation of mechanical object motion sensing by mi-crowave interferometry. Teh. Meh. 2013. No. 4. Pp. 112-122. (in Russian).

13. Motion and vibration parameter measurement method. Patent for Utility Model 89602 Ukraine, IPC G01H 9/00 / Pylypenko O. V., Gorev M. B., Doronin O. V., Kodzhespirova I. F. Privalov E. M.; applicant and patentee the Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the National Space Agency of Ukraine. u 2013 13965; filed Dec. 2, 2013; published Apr. 25, 2014, Bul. No. 8. 8 pp. (in Ukrainian).

14. Pylypenko O. V., Gorev N. B., Doronin A. V., Kodzhespirova I. F. Motion sensing by a two-probe implementation of microwave interferometry. Teh. Meh. 2014. No. 4. Pp. 85-93. (in Russian).

15. Pylypenko O. V., Gorev N. B., Doronin A. V., Kodzhespirova I. F. hase ambiguity resolution in relative displacement measurement by microwave in-terferometry. Teh. Meh. 2017. No. 2. Pp. 3-11.

16. Silvia M. T., Robinson E. A. Deconvolution of Geophysical Time Series in the Exploration for Oil and Natural Gas. Amsterdam-Oxford-New York: Elsevier Scientific Publishing Company, 1979. 447 pp.

17. Pylypenko O. V., Doronin A. V., Gorev N. B., Kodzhespirova I. F. Experi-mental verification of a two-prove implementation of microwave interferometry for displacement measurement. Teh. Meh. 2018. No. 1. Pp. 5-12.

18. Okubo Y., Uebo T. Experimental verification of measurement principle in standing wave radar capable of measuring distances down to zero meters. Electronics and Communication in Japan. Part 1. 2007. V. 90. No. 9. Pp. 25-33. https://doi.org/10.1002/ecja.20375

19. Pylypenko O. V., Gorev N. B., Doronin A. V., Kodzhespirova I. F. omplex reflection coefficient determination using probe measurements. Teh. Meh. 2015. No. 4. Pp. 139-147. (in Russian).

20. Pylypenko O. V., Gorev N. B., Doronin A. V., Kodzhespirova I. F. omplex reflection coefficient determination by microwave interferimetry using two elec-trical probes. Teh. Meh. 2016. No. 3. Pp. 43-50. (in Russian). https://doi.org/10.1109/YSF.2016.7753803





DOI: https://doi.org/10.15407/itm2018.03.138

Copyright () 2018 Pylypenko . V., Doronin A. V., Gorev N. B., Kodzhespirova I. F.

Copyright 2014-2018 Technical mechanics


____________________________________________________________________________________________________________________________
GUIDE
FOR AUTHORS
Guide for Authors