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Concrete utility poles land middle of broadband ultrasonic inspection method based on the macroscopic exploration theory
Concrete utility poles land middle of broadband ultrasonic inspection method based on the macroscopic exploration theory
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机译:基于宏观探索理论的混凝土电线杆接地宽带超声探伤方法
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摘要
PPROBLEM TO BE SOLVED: To provide a method for a person to easily search for and measure cracks in an underground part of an electric pole even if the person has not sufficient knowledge and experiences. PSOLUTION: The ultrasonic search method to search for cracks in an underground part of a concrete electric pole having a hollow part therein includes a step of finding a received wave GSBj/SB(t) by performing a multitude of times of reception at respective survey points, a step of preparing a crack calibration wave Gw(t), a step of correcting differences in the amplitude of GSBj/SB(t), a step of finding a narrow-band spectrum FASBj/SB(f) to find corresponding GASBj/SB(t) and calculating a tSB1/SBvalue each time a distance 1 is inputted, a step of finding new GASBj/SB(t) for analysis by using a CG(1) function, and a step of finding GBSBj/SB(t) by using a filter function. With GBSBnA+1/SB(t) maximally displayed, GBSBj/SBSPnS/SP(t) is comparatively displayed. When an evaluation segment crosses the wave of the GBSBj/SBSPnS/SP(t), it is determined at its measurement point j that cracks exist within the distance 1 or onward. Measurement is performed on whether the cracks exist and on a distance 1 to the cracks with a 1 value gradually increased. PCOPYRIGHT: (C)2008,JPO&INPIT
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