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STRUCTURE ASSESSMENT SYSTEM, STRUCTURE ASSESSMENT DEVICE AND STRUCTURE ASSESSMENT METHOD UPDATE

外国特許コード F180009617
整理番号 5466
掲載日 2018年11月20日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP008818
国際公開番号 WO 2017199542
国際出願日 平成29年3月6日(2017.3.6)
国際公開日 平成29年11月23日(2017.11.23)
優先権データ
  • 特願2016-098951 (2016.5.17) JP
発明の名称 (英語) STRUCTURE ASSESSMENT SYSTEM, STRUCTURE ASSESSMENT DEVICE AND STRUCTURE ASSESSMENT METHOD UPDATE
発明の概要(英語) A structure assessment system according to one embodiment comprises a plurality of AE sensors, a signal processing unit, a position locating unit, a speed calculating unit, and an assessment unit. The AE sensors detect elastic waves generated by a structure. The signal processing unit extracts an AE signal that includes information pertaining to the elastic waves, by performing signal processing on the elastic waves detected by the AE sensors. The position locating unit derives a source distribution that represents the distribution of sources of the elastic waves generated by the structure, on the basis of the AE signal. The speed calculating unit derives, on the basis of the AE signal, the velocity of propagation of the elastic wave generated by the structure. The assessment unit assesses the soundness of the structure on the basis of the source distribution and the velocity of propagation.
従来技術、競合技術の概要(英語) BACKGROUND ART
In recent years, highly economic growth phase of the bridge construction such as due to aging of the structure has been the problem. Even if an accident occurs to damage in case of the structure is in order to do, the state of the structure from the conventional technique for monitoring have been proposed. For example, the occurrence of the internal crack, or, with the development of the crack generated inside the elastic wave, detected by the high-sensitivity sensor AE(Acoustic Emission: acoustic, emission) method, the technique for detecting a damage of the structure has been proposed. AE is, material fatigue propagation of cracks occurring due to an elastic wave. AE method, the piezoelectric element using the AE sensor (voltage signal) of the elastic wave is detected as the signal AE. AE signal, before the fracture of the material is detected as an indication of the. Therefore, the occurrence frequency and signal intensity of the AE signal, indicative of the integrity of the material is useful. Therefore, deterioration of the structure of the AE method for detecting a sign of the study is being performed.
The load from the traffic and the like when applied to concrete version of the bridge, the development of cracks in the floor plate and the friction generated by the AE. AE sensor is provided on the surface of the floor plate can be, generated from the floor plate of the AE can be detected. In addition, a plurality of AE sensors may be installed in, between AE sensor of the AE AE signal from the difference between the arrival time of the location of the source location can be generated. The AE from the result of the position of the source location, target floor estimate the degree of damage of the plate is being performed. However, the plotting result, damage and the degree of association is not sufficient, and stable evaluation of the health may not be performed. In addition, such a problem, a concrete floor of the bridge plate is not limited to the generation of a crack or the progress of the elastic wave is generated with a structure that is common to all the problems.
  • 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)
  • WATABE Kazuo
  • TAKAMINE Hidefumi
  • SHIOTANI Tomoki
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 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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