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STRUCTURE EVALUATION SYSTEM AND STRUCTURE EVALUATION METHOD

外国特許コード F200010074
整理番号 5954
掲載日 2020年5月15日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP007314
国際公開番号 WO 2019167137
国際出願日 平成30年2月27日(2018.2.27)
国際公開日 令和元年9月6日(2019.9.6)
発明の名称 (英語) STRUCTURE EVALUATION SYSTEM AND STRUCTURE EVALUATION METHOD
発明の概要(英語) A structure evaluation system according to an embodiment comprises a plurality of sensors, a position location unit, and an evaluation unit. The plurality of sensors detect elastic waves. Using elastic waves, from among the plurality of elastic waves detected by the plurality of sensors, having an amplitude exceeding a threshold determined according to the position of the source of the plurality of elastic waves and the positions at which the plurality of sensors are disposed, the position location unit locates the position of the source of the elastic waves. The evaluation unit evaluates the deterioration state of the structure on the basis of the result of the location by the position location unit of the position of the source of the elastic waves.
従来技術、競合技術の概要(英語) BACKGROUND ART
The surface of the structure of the AE sensor such as a bridge such as in sensors may be installed, within the structure generated from the damaged part of the elastic wave can be detected. And moreover a plurality of sensors may be installed in, from the difference between the arrival time of the acoustic wave between the sensors, acoustic wave generation source (hereinafter 'elastic wave source' is called.) Can be the position of the location. In addition, with respect to the structure from the outside by an impact, for the same acoustic wave is generated, the position of the acoustic wave sources can be location. However, if the damage of the elastic wave propagation path, in order to prevent the propagation of the elastic wave, the acoustic wave sensor cannot be detected. As a result, the acoustic wave source to the correct position of the location is not possible. Using such a characteristic, the position location of an acoustic wave source distribution from disturbance, and the damage of the internal structure can be detected. However, the disposition of the sensor, no damage to the structure as a source of uniformly distributed elastic wave impact from the outside even when the structure is also provided, in the signal obtained from the orientation sensor of the wave source distribution is non-uniform elastic not. In such a case, the deterioration state of the structure may not be evaluated correctly.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • TOSHIBA CORPORATION
  • KYOTO UNIVERSITY
  • 発明者(英語)
  • SHIOTANI Tomoki
  • HASHIMOTO Katsufumi
  • TAKAMINE, Hidefumi
  • WATABE, Kazuo
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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