Non-Destructive Inspection of Concrete Structures by Ultrasonic Sensor Based on a Frequency Analysis
周波数解析に基づく超音波センサによるコンクリート構造物の非破壊検査

Shogo TANAKA, Tomoyuki WAKUNAGA
2002 Transactions of the Society of Instrument and Control Engineers  
doi:10.9746/sicetr1965.38.938 fatcat:v3gpb36v3vbhppczumbdpzf5qe