{"id":6499,"date":"2021-01-19T19:45:23","date_gmt":"2021-01-19T10:45:23","guid":{"rendered":"http:\/\/web.tohoku.ac.jp\/yusa\/?p=6499"},"modified":"2021-10-11T07:47:08","modified_gmt":"2021-10-10T22:47:08","slug":"measurement-katagiri","status":"publish","type":"post","link":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/2021\/measurement-katagiri\/","title":{"rendered":"\u8ad6\u6587\u63b2\u8f09\u6c7a\u5b9a\uff08Measurement\u8a8c\uff09!!"},"content":{"rendered":"\n<p>\u79c1(\u7247\u6850)\u306eD\u8ad6\u57f7\u7b46\u3082\u843d\u3061\u7740\u3044\u3066\u304d\u305f\u3053\u308d\u3001\u5b09\u3057\u3044\u304a\u77e5\u3089\u305b\u304c\u3042\u308a\u307e\u3057\u305f\u3002<br> \u5148\u65e5Measurement\u8a8c\u306b<a rel=\"noreferrer noopener\" href=\"https:\/\/doi.org\/10.1016\/j.measurement.2021.109074\" target=\"_blank\">Demonstration of detection of the multiple pipe wall thinning defects using microwaves (\u30de\u30a4\u30af\u30ed\u6ce2\u3092\u7528\u3044\u305f\u8907\u6570\u914d\u7ba1\u6e1b\u8089\u691c\u51fa\u306e\u5b9f\u8a3c)<\/a>\u3068\u306e\u30bf\u30a4\u30c8\u30eb\u3067\u6295\u7a3f\u3057\u305f\u8ad6\u6587\u306e\u53d7\u7406\u901a\u77e5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5f93\u6765\u306e\u91d1\u5c5e\u914d\u7ba1\u306b\u5bfe\u3059\u308b\u30de\u30a4\u30af\u30ed\u6ce2\u63a2\u50b7\u6cd5\u306e\u7814\u7a76\u3067\u306f\u3001\u6e1b\u8089\u3082\u3057\u304f\u306f\u4e80\u88c2\u304c1\u7b87\u6240\u306b\u306e\u307f\u5b58\u5728\u3059\u308b\u5834\u5408\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u3001\u8907\u6570\u306e\u304d\u305a\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u3069\u308c\u3060\u3051\u691c\u51fa\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u306e\u304b\u3001\u3068\u3044\u3046\u3053\u3068\u306b\u3064\u3044\u3066\u306f\u8a55\u4fa1\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u305d\u3053\u3067\u672c\u7814\u7a76\u3067\u306f\u3001\u914d\u7ba1\u5185\u306e\u8907\u6570\u7b87\u6240\u306b\u6e1b\u8089\u90e8\u304c\u751f\u3058\u3066\u3044\u3066\u3082\u691c\u51fa\u53ef\u80fd\u3067\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u5b9f\u8a3c\u3057\u305f\u3001\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"447\" src=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig4.png?resize=482%2C447\" alt=\"\" class=\"wp-image-6608\" srcset=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig4.png?w=482 482w, https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig4.png?resize=300%2C278 300w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\" \/><\/figure>\n\n\n\n<p>\u3053\u3061\u3089\u304c\u5b9f\u9a13\u4f53\u7cfb\u3002\uff11\uff15\uff4d\u914d\u7ba1\u306e\u5185\u90e8\u306b\u30de\u30a4\u30af\u30ed\u6ce2\u3092\u4f1d\u64ad\u3055\u305b\u3001\u914d\u7ba1\u5185\u58c1\u306e\u4e00\u62ec\u63a2\u50b7\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"916\" height=\"274\" src=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig8c.png?resize=916%2C274\" alt=\"\" class=\"wp-image-6610\" srcset=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig8c.png?w=916 916w, https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig8c.png?resize=300%2C90 300w, https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig8c.png?resize=768%2C230 768w\" sizes=\"auto, (max-width: 916px) 100vw, 916px\" \/><\/figure>\n\n\n\n<p>\u3067\u3001\u3053\u3061\u3089\u304c\u5f97\u3089\u308c\u305f\u4fe1\u53f7\u3002\u5de6\u304c\u6a21\u64ec\u6e1b\u8089\u304c\uff11\u3064\uff08PWT1\uff09\u306e\u307f\u3001\u53f3\u304c\uff12\u3064\uff08PWT1\u3068PWT2\uff09\u306e\u5834\u5408\u3002\u5b9f\u969b\u306b\u6a21\u64ec\u6e1b\u8089\u3092\u8a2d\u7f6e\u3057\u305f\u4f4d\u7f6e\u304b\u3089\u306e\u660e\u77ad\u306a\u53cd\u5c04\u6ce2\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"306\" src=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig9.png?resize=852%2C306\" alt=\"\" class=\"wp-image-6611\" srcset=\"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig9.png?w=852 852w, https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig9.png?resize=300%2C108 300w, https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/02\/ktgr_meas_fig9.png?resize=768%2C276 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n\n\n\n<p>\u6a21\u64ec\u6e1b\u8089\u306e\u4f4d\u7f6e\u3068\u4fe1\u53f7\u632f\u5e45\u3068\u306e\u95a2\u4fc2\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u304c\u3053\u3061\u3089\u3002\u9ed2\u4e38\u304c\u6a21\u64ec\u6e1b\u8089\uff11\u3064\u306e\u307f\u306e\u5834\u5408\u306e\u7d50\u679c\u3067\u3001\u9ed2\u5b9f\u7dda\u304c\u7406\u8ad6\u5024\u3002\u6a21\u64ec\u6e1b\u8089\u304c\uff12\u3064\u3042\u308b\u5834\u5408\u3067\u3082\u6a21\u64ec\u6e1b\u8089\uff11\u3064\u306e\u5834\u5408\u306e\u6e1b\u8870\u66f2\u7dda\u72b6\u306b\u307b\u3068\u3093\u3069\u4e57\u3063\u3066\u304a\u308a\u3001\u7d50\u679c\u3068\u3057\u3066\u8907\u6570\u6e1b\u8089\u306e\u5834\u5408\u3067\u3082\u691c\u51fa\u6027\u306e\u4f4e\u4e0b\u306f\u7121\u3044\u3001\u3068\u5224\u65ad\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u8ad6\u6587\u306e\u6982\u8981\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<p><u>Author<\/u>: Takuya Katagiri, Guanren Chen, Noritaka Yusa, Hidetoshi Hashizume<\/p>\n\n\n\n<p><u>Title<\/u>: <a rel=\"noreferrer noopener\" aria-label=\"Demonstration of detection of the multiple pipe wall thinning defects using microwaves (\u65b0\u3057\u3044\u30bf\u30d6\u3067\u958b\u304f)\" href=\"https:\/\/doi.org\/10.1016\/j.measurement.2021.109074\" target=\"_blank\">Demonstration of detection of the multiple pipe wall thinning defects using microwaves (\u30de\u30a4\u30af\u30ed\u6ce2\u3092\u7528\u3044\u305f\u8907\u6570\u914d\u7ba1\u6e1b\u8089\u691c\u51fa\u306e\u5b9f\u8a3c<\/a>\uff09<\/p>\n\n\n\n<p><u>Abstract<\/u>: In this study, the applicability of a nondestructive method using microwaves to the detection of multiple pipe wall thinning defects was investigated. In numerical simulation, a single full circumferential defect was introduced into a straight pipe of 19 mm inner diameter, and the effect of the defect on transmitted waves was investigated. The transmitted energy ratio of the TM01 mode to the emitted wave was found to be 93% in average even in the presence of a 1-mm depth thinning. After that, experimental measurements were performed using a flanged brass tube with two artificial thinning defects. By applying signal processing to the measured S-parameters, clear reflections from the two defects were observed. By comparing the signals, we confirmed that the first full circumferential defect provides at most 12% amplitude attenuation of the reflected signal from the second defect, which should be related to the distance and size of the defects. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u79c1(\u7247\u6850)\u306eD\u8ad6\u57f7\u7b46\u3082\u843d\u3061\u7740\u3044\u3066\u304d\u305f\u3053\u308d\u3001\u5b09\u3057\u3044\u304a\u77e5\u3089\u305b\u304c\u3042\u308a\u307e\u3057\u305f\u3002 \u5148\u65e5Measurement\u8a8c\u306bDemonstration of detection of &#8230; <\/p>\n","protected":false},"author":2,"featured_media":6502,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,8,189,14],"tags":[143],"class_list":["post-6499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-achievement","category-journal","category-mesurement","category-student","tag-143"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/web.tohoku.ac.jp\/yusa\/wp-content\/uploads\/2021\/01\/journal_img_measurement_2019.png?fit=200%2C200","_links":{"self":[{"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/posts\/6499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/comments?post=6499"}],"version-history":[{"count":12,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/posts\/6499\/revisions"}],"predecessor-version":[{"id":6628,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/posts\/6499\/revisions\/6628"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/media\/6502"}],"wp:attachment":[{"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/media?parent=6499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/categories?post=6499"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/web.tohoku.ac.jp\/yusa\/index.php\/wp-json\/wp\/v2\/tags?post=6499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}