JP6660486B2 - 磁性線状体の損傷評価方法および損傷評価装置 - Google Patents
磁性線状体の損傷評価方法および損傷評価装置 Download PDFInfo
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Description
10 テンドン
20 磁化器
21 ボビン
23 中心孔
24 励磁コイル
26 鉄心(ヨーク軸)
31F,31R 柱状ヨーク
32F,32R 板状ヨーク
41F,41R サーチコイル
51 フレーム
52 ローラ
61 ホール素子群
61a,61r ホール素子
63 ロータリーエンコーダ
81 信号処理装置
82 記録装置
Claims (5)
- 損傷を評価すべき磁性線状体が埋め込まれたコンクリート構造物上において,磁力を発生する磁化器,および磁化器が発生した磁力によって磁化される上記磁性線状体の損傷箇所から生じる磁気変化量を検出する検出器を含む損傷評価装置を,上記磁性線状体に沿って移動させ,
上記磁化器が,励磁コイルと,上記励磁コイルの中心孔に挿通されたヨーク軸と,上記ヨーク軸の両端に接続され,コンクリート面に向けてそれぞれ伸びる1対の柱状ヨークと,上記1対の柱状ヨークの先端のそれぞれに接続され,コンクリート面に沿う広がりを有する磁極を形成する1対の板状ヨークを含み,上記励磁コイルに電流を流すことによって,上記ヨーク軸,1対の柱状ヨーク,1対の板状ヨーク,および1対の板状ヨークの間に位置する範囲の磁性線状体を含む磁気回路を形成する,磁性線状体の損傷評価方法であって,
上記検出器が,
上記1対の板状ヨークの中間位置に固定され,上記励磁コイルの中心軸の方向と直交する向きにコンクリート面に沿って一列に配置された,上記磁性線状体の半径方向の磁束に感応する向きを持つ第1のホール素子と上記磁性線状体の軸方向の磁束に感応する向きを持つ第2のホール素子とを含み,
上記第1のホール素子から出力される出力信号に基づいて上記磁性線状体の損傷箇所から漏洩する磁束を検出し,かつ上記第2のホール素子から出力される出力信号に基づいて上記磁性線状体に対する上記損傷評価装置の位置を検出する,
磁性線状体の損傷評価方法。 - 上記1対の柱状ヨークの少なくとも一方に巻き付けられたサーチコイルをさらに備え,
上記サーチコイルから出力される出力信号に基づいて上記磁気回路を流れる磁束を検出する,
請求項1に記載の磁性線状体の損傷評価方法。 - 上記1対の板状ヨークの少なくとも一方の底面に設けられた第3のホール素子を備え,
上記第3のホール素子から出力される出力信号に基づいて上記磁気回路を流れる磁束を検出する,
請求項1または2に記載の磁性線状体の損傷評価方法。 - 上記1対の板状ヨーク間の距離が,上記1対の板状ヨークの底面から上記磁性線状体までの距離よりも長い,
請求項1から3のいずれか一項に記載の磁性線状体の損傷評価方法。 - 損傷を評価すべき磁性線状体が埋め込まれたコンクリート構造物上に設置されて用いられ,磁力を発生する磁化器,および磁化器が発生した磁力によって磁化される上記磁性線状体の損傷箇所から生じる磁気変化量を検出する検出器を含む損傷評価装置であって,
移動量センサを含み,上記損傷評価装置を上記磁性線状体に沿って移動させる移動装置を備え,
上記磁化器が,励磁コイルと,上記励磁コイルの中心孔に挿通されたヨーク軸と,上記ヨーク軸の両端に接続され,コンクリート面に向けてそれぞれ伸びる1対の柱状ヨークと,上記1対の柱状ヨークの先端のそれぞれに接続され,コンクリート面に沿う広がりを有する磁極を形成する1対の板状ヨークを含み,上記励磁コイルに電流を流すことによって,上記ヨーク軸,1対の柱状ヨーク,1対の板状ヨーク,および1対の板状ヨークの間に位置する範囲の磁性線状体によって磁気回路を形成するものであり,
上記検出器が,上記1対の板状ヨークの中間位置に固定され,上記励磁コイルの中心軸の方向と直交する向きにコンクリート面に沿って一列に配置された,上記磁性線状体の半径方向の磁束に感応する向きを持つ第1のホール素子と上記磁性線状体の軸方向の磁束に感応する向きを持つ第2のホール素子とを含み,上記第1のホール素子から出力される出力信号に基づいて上記磁性線状体の損傷箇所から漏洩する磁束を検出し,かつ上記第2のホール素子から出力される出力信号に基づいて上記磁性線状体に対する上記損傷評価装置の位置を検出する位置検出手段付漏洩磁束検出器である,
磁性線状体の損傷評価装置。
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KR102178721B1 (ko) * | 2020-08-24 | 2020-11-13 | 한국건설기술연구원 | 유도전압 측정을 이용한 텐던의 손상 탐지방법 및 손상 탐지장치 |
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