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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: 9m
    Speed control: 10cm/s (max)
    Positioning precision: within±1cm
    Lateral unit Lateral Span: 6m
    Lateral speed: 1cm/s
    Positioning precision: within±1cm
    Vertical unit Mounting weight: 500Kg
    Vertical motion range:
    2m above water and 4.5m underwater
    Vertical speed: 1cm/s
    Positioning precision: within±5cm
    Rotation unit Rotation angle: 370°clockwise, 370°counterclockwise
    Rotation rate: 3°/s to 0.5°/s
    Angular precision: within±0.5°
  3. Underwater acoustic transducer automatic calibration device
    The items necessary for obtaining the capacity of the underwater acoustic transducer and other underwater acoustic instruments can be calibrated automatically
    Item Explanation
    Items measured Transducer voltage sensitivity,directional characteristic, and frequency characteristic
    Measured modes Pulse waves or continuous waves
    Frequency range Approximately 5kHz~250kHz

Research fields

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