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Volume 15 Number 3
  • ISSN: 1569-4445
  • E-ISSN: 1873-0604

Abstract

ABSTRACT

This paper discusses the relationship between feeding line delay compensation and direction of arrival estimation in an array‐type directional borehole radar. In this radar, since the space available for an array antenna is limited by the borehole diameter, direction of arrival estimation is based on small travel time differences among array elements, and an accurate compensation of feeding line delays is important. Computer simulation confirmed that the radar probe rotation in a borehole leads to errors in the direction of arrival estimation of greater than 15° if the delays associated with the feeding array antenna elements are not compensated to within 0.1 ns. This may be caused by a failure to measure the time delays of electrical circuits around the feeding points of the antenna elements. In this case, we suggest that the lengths of system components other than the coaxial cables should be kept to less than 3 cm. Based on these investigations, we developed an array‐type directional borehole radar for a geotechnical project to locate foundation piles. In a field experiment, we confirmed that direction of arrival estimation errors were below about 15°, although the radar probe rotated through more than 180° during the measurement, thanks to correct compensation of the cables. With the correct compensation, we demonstrated three‐dimensional location of a buried cylindrical conducting object, which was located at 2 m from the radar in wet soil. We were able to estimate the reflection point position with an accuracy of 34 cm, which is the averaged error of the three‐dimensional location, while allowing the radar probe to rotate.

© European Association of Geoscientists and Engineers © 2017 European Association of Geoscientists and Engineers
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2017-03-01
2024-04-20

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References

  1. ArjwechR., EverettM.E., BriaudJ.‐L., HurlebausS., Medina‐CetinaZ., TuckerS. and YousefpourN.2013. Electrical resistivity imaging of unknown bridge foundations. Near Surface Geophysics11, 591–598.
     [Google Scholar]
  2. BalanisA.B.2005. Antenna Theory, 3rd edn., John Wiley & Sons.
     [Google Scholar]
  3. BorchertO., BehaimanotaK. and GlasmachersaA.2009. Directional borehole radar calibration. Journal of Applied Geophysics67, 352–360.
     [Google Scholar]
  4. CohenL.1995. Time‐Frequency Analysis, Prentice Hall.
     [Google Scholar]
  5. ColeK.S. and ColeR.H.1941. Dispersion and absorption in dielectrics, I. Alternating current characteristics. Journal of Chemical Physics9, 341–351.
     [Google Scholar]
  6. DanielsD.J.2004. Ground Penetrating Radar, 2nd edn., The Institute of Electrical Engineers.
     [Google Scholar]
  7. van DongenK.W.A.2002. A directional borehole radar system for subsurface imaging, PhD thesis, TU Delft, Delft University Press.
     [Google Scholar]
  8. DongP., SunB., FanJ. and WangL.2011. Determining lengths of reinforcements in bored in situ concrete piles using the magnetic method. Journal of Environmental and Engineering Geophysics16. 37–46.
     [Google Scholar]
  9. DuW., SuD., XieS. and HuiH.T.2012. A fast calculation method for the receiving mutual impedances of uniform circular arrays. IEEE Antennas and Wireless Propagation Letters11, 893–896.
     [Google Scholar]
  10. EbiharaS., SatoM. and NiitsumaH.2000. Super‐resolution of coherent targets by a directional borehole radar. IEEE Transactions on Geoscience and Remote Sensing38, 1725–1732.
     [Google Scholar]
  11. EbiharaS.2004. Directional borehole radar with dipole antenna array using optical modulators. IEEE Transactions on Geoscience and Remote Sensing42, 45–58.
     [Google Scholar]
  12. EbiharaS., NagoyaK., AbeN. and ToidaM.2006. Experimental studies for monitoring water‐level by dipole‐antenna array radar fixed in subsurface. Near Surface Geophysics4, 89–96.
     [Google Scholar]
  13. EbiharaS., HanaokaH., OkumuraT. and WadaY.2012. Interference criterion for coaxial‐fed circular dipole array antenna in a borehole. IEEE Transactions on Geoscience and Remote Sensing50, 3510–3526.
     [Google Scholar]
  14. EbiharaS., KawaiH. and WadaK.2013. Estimating 3‐D position and inclination of a planar interface with directional borehole radar. Near Surface Geophysics11, 185–195.
     [Google Scholar]
  15. EbiharaS., KimuraY., ShimomuraT., UchimuraR. and ChoshiH.2015. Coaxial‐fed circular dipole array antenna with ferrite loading for thin directional borehole radar sonde. IEEE Transactions on Geoscience and Remote Sensing53, 1842–1854.
     [Google Scholar]
  16. GundelachV. and EisenburgerD.2007. Principle of a direction sensitive borehole antenna with advanced technology and data examples. Proceedings of the 4th International Workshop on Advancing Ground Penetrating Radar, vol. 1, 28–31.
     [Google Scholar]
  17. GundelachV., EisenburgerD., BuschmannU., BehaimanotK. and SieverK.2009. The direction sensitive borehole system DABoR and first results from a vertical borehole in salt. Proceedings of the 5th International Workshop on Advancing Ground Penetrating Radar, vol. 1, 113–117.
     [Google Scholar]
  18. JacksonB.R., RajanS., LiaoB.J. and WangS.2015. Direction of arrival estimation using directive antennas in uniform circular arrays. IEEE Transactions on Antennas and Propagation63, 736–747.
     [Google Scholar]
  19. KingRW.P., FikiorisG.J. and MackR.B.2002. Cylindrical Antennas and Arrays, 2nd edn. Cambridge University Press.
     [Google Scholar]
  20. LambotS. and AndreF.2014Full‐wave modeling of near‐field radar data for planar layered media reconstruction. IEEE Transactions on Geoscience and Remote Sensing52, 2295–2303.
     [Google Scholar]
  21. LambotS., SlobE.C., van den BoschI., StockbroeckxB. and VancloosterM.2004. Modeling of ground‐penetrating radar for accurate characterization of subsurface electric properties. IEEE Transactions on Geoscience and Remote Sensing42, 2555–2568.
     [Google Scholar]
  22. LiangH., YangH. and ZhangJ.2012. A cylindrical conformal directional monopole antenna for borehole radar application. IEEE Antennas and Wireless Propagation Letters11, 1525–1528.
     [Google Scholar]
  23. NiederleithingerE. and FritscheM.2010. Measurement of sheet pile length by pile integrity testing and the parallel seismic method. Proceeding of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, vol. 1, 675–684.
     [Google Scholar]
  24. RauscheF. and RobinsonB.2010. Advances in the evaluation of pile and shaft quality. Proceeding of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, vol. 1, 326–334.
     [Google Scholar]
  25. SackD. A. and OlsonL. D.2010. Combined parallel seismic and cone penetrometer testing of existing bridge foundations and levee sheet piles for length and capacity evaluations. Proceeding of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, vol. 1, 655–663.
     [Google Scholar]
  26. SatoM. and TanimotoT.1992. A shielded loop array antenna for a directional borehole radar. Proceedings of the 4th International Conference on the GPR, Geological Survey of Finland, 16, 323–327.
     [Google Scholar]
  27. SatoM. and TakayamaT.2007. A novel directional borehole radar system using optical electric field sensors. IEEE Transactions on Geoscience and Remote Sensing45, 2529–2535.
     [Google Scholar]
  28. SieverK.2000. Three‐dimensional borehole radar measurements—A standard logging method?Proceedings of the Eighth International Conference on Ground Penetrating Radar (GPR 2000), vol. I, 1–7.
     [Google Scholar]
  29. SlobE., SatoM. and OlhoeftG.2010. Surface and borehole ground‐penetrating‐radar developments. Geophysics75, 75A103–75A120.
     [Google Scholar]
  30. TakayamaT. and SatoM.2007. A novel direction‐finding algorithm for directional borehole radar. IEEE Transactions on Geoscience and Remote Sensing45, 2520–2528.
     [Google Scholar]
  31. TherrienC.W.1992. Discrete Random Signals and Statistical Signal Processing, Prentice Hall.
     [Google Scholar]
  32. TranA.P., RezaM., ArdekaniM. and LambotS.2012. Coupling of dielectric mixing models with full‐wave ground‐penetrating radar signal inversion for sandy‐soil‐moisture estimation. Geophysics77, H33–H44.
     [Google Scholar]
  33. TranA.P., AndreF. and LambotS.2014. Validation of near‐field ground‐penetrating radar modeling using full‐wave inversion for soil moisture estimation. IEEE Transactions on Geoscience and Remote Sensing52, 5483–5497.
     [Google Scholar]
  34. YamashitaY. and ToshiokaT.2002. Application of borehole radar to buried object survey for civil engineering purpose. EAGE 64th Conference & Exhibition, vol. I, P041.
     [Google Scholar]
  35. van WaardR., van der BaanS. and van DongenK.W.A.2004. Experimental data of a directional borehole radar system for UXO detection. Proceedings of the Tenth International Conference on Ground Penetrating Radar (GPR 2004), vol. I, 225–228.
     [Google Scholar]
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Probe rotation effects on direction of arrival estimation in array‐type directional borehole radar
Near Surface Geophysics 15, 286 (2017); https://doi.org/10.3997/1873-0604.2017012
/content/journals/10.3997/1873-0604.2017012
/content/journals/10.3997/1873-0604.2017012
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  • Article Type: Research Article

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