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Facilities and Equipment in Yokosuka Headquarters

Ultrasonic tank

Outline

  1. The tank and anechoic device
    Material:
    Ferro-concrete
    Tank demension:
    9m (length) × 9m (width) × 9m (depth)
    Anechoic device:
    Absorbers (Meyer rubber) attached to all sides and bottom (5 surfaces)
  2. Transducer Position Determination Control Device
    For observations involving the sample, the sample position can be controlled and determined either automatically or manually. Information on the sample position is displayed in digital format.
    Item Explanation
    Forward unit Span: 13m   (approx. 4.5m length with 8.5m depth)
    Speed control:  0~10cm/s (variable speed)
    Lateral unit Lateral Span: 6m   (approx. 4.5m length with 8.5m depth) 
    Lateral speed: 1cm/s
    Vertical unit Mounting weight: 500Kg (max.)
    Vertical motion range:
    1.7m above water / deepest dive 4.5m (approx.) 
    Vertical speed: 1cm/s
    Positioning precision: within±3cm
    Rotation unit Rotation angle: 370°clockwise, 370°counterclockwise
    Rotation rate: 3°/s to 0.5°/s  (variable speed)
    Angular precision: within±0.5°

Research fields

1)
Calibration and measurement of underwater acoustic transducer characteristics
2)
In-tank tests of various undersea instruments, sonar, and acoustic navigation instruments