DAMAGED SLEEPER DETECTION DEVICE AND DAMAGED SLEEPER DETECTION METHOD

To provide a damaged sleeper detection device and the like capable of detecting the damage of sleepers easily and highly accurately.SOLUTION: A damaged sleeper detection device 1 for detecting the damage of a sleeper S supporting a rail R includes: vibration means 40 for giving the vibration to the sleeper; sound acquisition means 50 for acquiring the sound emitted from the sleeper; natural frequency detection means 130 for detecting the natural frequency of the deflection tertiary mode of the sleeper from the sound acquired by the sound acquisition means; and damage discrimination means 180 for discriminating the damage of the sleeper based on the natural frequency detected by the natural frequency detection means. The sound acquisition means has the directivity in which the sensibility is varied depending on the directions of sound sources, and position regulation means 10 for regulating a relative positional relationship of the sleeper and the sound acquisition means such that a direction of the maximum sensibility of the sound acquisition means becomes a direction in a place or in the vicinity thereof where the displacement in the deflection tertiary mode becomes the maximum when giving the vibration to the sleeper.SELECTED DRAWING: Figure 1 【課題】容易かつ高精度にまくらぎの損傷を検出可能な損傷まくらぎ検知装置等を提供する。【解決手段】レールＲを支持するまくらぎＳの損傷を検知する損傷まくらぎ検知装置１を、まくらぎを加振する加振手段４０と、まくらぎが発生する音を取得する音声取得手段５０と、音声取得手段が取得した音からまくらぎのたわみ３次モードの固有振動数を検出する固有振動数検出手段１３０と、固有振動数検出手段が検出した固有振動数に基づいてまくらぎの損傷を判別する損傷判別手段１８０とを備え、音声取得手段は、音源の方向に応じて感度が異なる指向性を有し、音声取得手段の感度が最高となる方向がまくらぎを加振した際のたわみ３次モードにおける変位が極大となる箇所又はその近傍の方向となるようにまくらぎと音声取得手段との相対位置関係を規制する位置規制手段１０を有する構成とする。【選択図】図１