Device for impressing and detecting underwater vibration

Abstract

Abstract PURPOSE:To impress the vibration caused by the hit of a diaphragm of an underwater vibration transmitting plate directly to water and to detect the underwater vibration induced to water directly by the underwater vibration plate by providing the underwater vibration transmitting plate spacing a pipe wall. CONSTITUTION:A city water pipe cap 1 consisting of a cylindrical outer pipe 2 and an inner pipe 3 is fitted with the drawing pipe 4 of a fire hydrant. The underwater vibration transmitting plate 5 consists of a counter sunk rivet-like shaft 6 and a circular diaphragm 8, the periphery of the shaft 6 is contacted and slided to rubber-made O-rings 9, 10 fitted to the inwall of the inner pipe 3 and the counter sunk head of the shaft 6 is supported and stored in the city water pipe cap 1 to space a similar O-ring 11. When air is evacuated by an air evacuation 12 and the city water pipe cap 1 is filled with water 14, the underwater vibration transmitting plate 5 ascends from a dot-line position by water pressure as shown in the solid line. If the upper surface of the diaphragm 8 is hitted as it is, the underwater vibration can be induced to the water 14 directly through the shaft 6. If a sensor is fitted to the diaphragm 8, the underwater vibration induced to the water 14 can be directly detected.

Inventors

• 👤 Yoshio Seki
• 👤 関　良雄
• 👤 Isao Matsumoto
• 👤 功 松本
• 👤 Kenji Yamada
• 👤 健二 山田
• 👤 Shozo Yamazaki
• 👤 山崎　章三
• 👤 Masaru Sakuma
• 👤 勝 佐久間

Bibliographic Details