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OwnerYoshida Takashi, Watanabe Syoichi +3inventors
InventorsYoshida Takashi, Watanabe Syoichi, Yamada Katsuo, Hamada Tokihiko, Hiraoka Yuzuru
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The present invention relates to a PPI sonar for horizontally turning a transmitting and receiving transducer emitting and receiving ultrasonic signals in one direction within an azimuthal range in one angular direction and in the reverse angular direction to search the water in a sector form and for having the position of own ship defined at an off-centered point on the screen of an indicator to display underwater conditions in a corresponding wide sectorial display area. A PPI sonar according to the present invention comprises turning reference point setting device for setting a reference point (B) in horizontally turning the transmitting and receiving transducer within an azimuthal range of a search area in a clockwise direction and in an anti-clockwise direction or own ship's position setting device for setting the position of own ship, and means for defining a display area on an indicator to display searched underwater conditions thereon based on output signals produced by either one of these setting devices.
A PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer within an azimuthal range in one angular direction and in the reverse angular direction, to search underwater conditions in a sector form and to display the searched underwater conditions in a sector form with the position of own ship at the origin of the sector on an indicator comprising:
A PPI sonar for horizontally turning a transmitting and receiving transducer emitting and receiving ultrasonic signals in one direction within an azimuthal range in one angular direction and in the reverse angular direction to search underwater conditions in a sector form determined in accordance with a detection range with respect to the own ship, a horizontal and angular search range in which the transmitting and receiving transducer is turned around and a reference point in turning the transducer and to determine the position of own ship and the reference point in the turning movement on the indicator and to display the underwater conditions thereon comprising:
A PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer within an azimuthal range in one angular direction and in the reverse angular direction, to search underwater conditions in a sector form with the own ship at its center and to display the searched underwater conditions in a sector form with the position of own ship at the origin of the sector on an indicator comprising:
A PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer within an azimuthal range in one angular direction and in the reverse angular direction, to search underwater conditions in a sector form, there being a reference point in correspondence to turning the transducer, to determine the position of own ship and the reference point in correspondence to the turning movement on the indicator and to display the underwater conditions thereon comprising:
A display method in a PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer within an azimuthal range in one angular direction and in the reverse angular direction, to search underwater conditions in a sector form, there being a reference point in correspondence to turning the transducer, to determine a position of own ship and the reference point in correspondence to the turning movement on the indicator and to display the underwater conditions thereon, the method comprising the step of:
A PPI sonar for turning a transmitting and receiving ultrasonic transducer within an azimuthal range of a search area in one angular direction and in the reverse angular direction, so that the water in a wide range of directions is searched, and for displaying searched underwater conditions surrounding the own ship on an indicator, comprising:
A PPI sonar for turning a transmitting and receiving ultrasonic transducer within an azimuthal range of a search area in one angular direction and in the reverse angular direction, so that the water in a wide range of directions is searched, and for displaying searched underwater conditions surrounding the own ship on an indicator comprising:
A PPI sonar for horizontally turning a transmitting and receiving transducer ultrasonic within an azimuthal range of a search area in one angular direction and in the reverse angular direction, to search the water in a sector form with the own ship at the origin thereof and for displaying searched underwater conditions in a sector form on an indicator with the position of the own ship at the center of the sector comprising:
A PPI sonar for horizontally turning a transmitting and receiving transducer in one direction within an azimuthal range of a search area in one angular direction and in the reverse angular direction to search the water in a sector form with the own ship at the origin thereof and for displaying searched underwater conditions in a sector form on an indicator with the position of the own ship at the center of the sector comprising:
A display method in a PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer within an azimuthal range in one angular direction within an azimuthal range in one angular direction and in the reverse angular direction, to search underwater conditions in a sector form, there being a reference point in correspondence to turning the transducer, to determine position of own ship and the reference point in correspondence to the turning movement on the indicator and to display the underwater conditions thereon, the method comprising the step of:
A PPI sonar for horizontally turning a transmitting and receiving ultrasonic transducer searching a sectorial area in an azimuthal range of directions in one angular direction and in the reverse angular direction, to search underwater conditions and for displaying searched underwater conditions on an indicator in a sector form with the position of own ship at the center thereof comprising:
Dependencies are inferred from the claim text.