| 摘要 |
PURPOSE:To always automatically hold a wave transmitting/receiving surface of a vibrator at the same angle of depression position with respect to the level, by getting a container having an ultrasonic wave transmitting/receiving element always driven being oriented to the direction of gravity regardless of rocking and pitching of a hull. CONSTITUTION:A container 64 and a U-shaped support metal 70 are surrounded by an enclosure 86 comprising a cylindrical body with one end thereof formed roughly in a sphere. A gear 55 which is driven being meshed with a gear 42 mounted on a shaft of a drive motor 60 is turned in the direction of the angle thetaof depression with the rotation of the motor 60 to set a wave transmitting/ receiving surface S of a transmitter/receiver 22 retained on a shaft 52 within a transmitter/receiver 50 at a specified set angle theta1. Then, the enclosure is fastened on a hull and the container is always made driven being oriented to the direction of gravity with the rocking and pitching of the hull. Thus, an ultrasonic wave transmitting/receiving surface of an ultrasonic wave transmitting/receiving element is fixed in a specified direction or is oriented to a projected direction in an ultrasonic wave transmitter/receiver arranged in the container.
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