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ZHANG Faquan, ZHOU Qiang, WANG Guofu, YE Jincai. A non-destructive measurement method of metal anchor pole length[J]. Journal of Mine Automation, 2016, 42(5): 24-27. DOI: 10.13272/j.issn.1671-251x.2016.05.006
Citation: ZHANG Faquan, ZHOU Qiang, WANG Guofu, YE Jincai. A non-destructive measurement method of metal anchor pole length[J]. Journal of Mine Automation, 2016, 42(5): 24-27. DOI: 10.13272/j.issn.1671-251x.2016.05.006
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A non-destructive measurement method of metal anchor pole length

  • School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China

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  • For problems of complex signal coupling and limited measuring length existed in non-destructive measurement methods at present, a non-destructive measurement method of metal anchor pole length was proposed based on half wave dipole antenna theory. A half wave dipole antenna is equaled by a metal reference wire as an arm and a single metal anchor pole as the other one. Influence of asymmetric half wave dipole antenna on the antenna resonant frequency is analyzed by HFSS software analyzes, and frequency scanning method is used to find the antenna resonant frequency. The metal anchor pole length is calculated by use of the antenna resonant frequency and the metal reference wire length according to relationship between antenna length and signal wavelength when the half wave dipole antenna resonances. The test results show that measurement length of the method is more than 10 m and measurement error is less than 5%.
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