Furuno Electric Co., Ltd.

Embodiments of the present disclosure provide an antenna device. The antenna device includes a dielectric substrate and a series-connected patched array antenna. The series-connected patched array antenna includes a plurality of patched antennas aligned in a predetermined direction on the dielectric substrate and connected in series. Also, the series-connected patched array antenna includes a plurality of transmission lines connecting adjacent patched antennas of the plurality of patched antennas. Furthermore, for each patched antenna of the plurality of patched antennas, a width of the patch antenna is different from a width of an adjacent patched antenna, on either side, in the predetermined direction. Also, a plurality of line lengths of the plurality of respective transmission lines varies along the predetermined direction.

A target monitoring device includes: a data acquiring unit, acquiring image data including a ship observed by an imaging sensor; an image recognizing unit, detecting a region of the ship included in the image data; a distance acquiring unit, acquiring a distance to the ship from an observation position detected by a sensor that is different from the imaging sensor; a course acquiring unit, acquiring a course of the ship detected by the sensor that is different from the imaging sensor; and a ship body length estimating unit, estimating a ship body length of the ship based on a dimension of the region of the ship in a horizontal direction, the distance to the ship, and the course of the ship.

A navigation planning system configured to acquire a planned route for a movable body on a water. Further, movable body information and obstacle information an obstacle located in a surrounding area of the movable body is acquired. Subsequently, an evasion route, different from the planned route is acquired. Further, a collision risk indicating a risk of collision between the movable body and the obstacle is calculated based on the movable body information and obstacle information. Furthermore, a maximum evasion route collision risk when the movable body travels on the evasion route and a maximum planned route collision risk the movable body travels on the planned route are obtained. Finally, the navigation planning system outputs a navigation route change signal indicating that the movable body change the planned route to the evasion route when the maximum evasion route collision risk is less than the maximum planned route collision risk.

The present disclosure provides a system and a method for generating echo trails for a plurality of predefined selectable pulse widths. An antenna receives echo information of source waves at a vessel, from a targeted object. An echo image generator is configured to generate a plurality of processed echo information sets from the received echo information. The received echo information corresponds to a first pulse width of the echo trail. The plurality of processed echo information sets comprising a plurality of echo trails of the target object is stored in at least one storage. An echo trail of the plurality of echo trails is selected by a selector based on a second pulse width set by a user. A synthesizer synthesizes a display output based on the selected echo trail.

The present disclosure provides a system and method of generating echo trails for a set of display ranges. An antenna receives echo information of source waves at a vessel, from a targeted object. An echo image generator is configured to generate a plurality of processed echo information sets from the received echo information. The received echo information corresponds to a first display range of a display. The plurality of processed echo information sets comprising a plurality of echo trails of the target object is stored in at least one storage. An echo trail of the plurality of echo trails is selected by a selector based on a second display range set by a user. A synthesizer synthesizes a display output based on the selected echo trail.

A directional coupler of present invention includes a waveguide, a substrate, two first slits, and two second slits. The substrate is having a strip line and ground layers opposed to each other at a side surface of the waveguide. The two first slits are provided in the side surface of the waveguide along a propagation direction of an electromagnetic waves in the waveguide, and the two second slits are provided in the first ground layer of the substrate opposed to the two first slits.

A receiver includes an antenna and processing circuitry. The antenna receives the satellite signals from each of the plurality of satellite systems in a multi-GNSS positioning using the plurality of satellite systems. The processing circuitry estimates a time error of the antenna for each of the plurality of satellite systems. The time error of the antenna is estimated based on the system time of each of the plurality of satellite systems. The system time of each of the plurality of satellite systems is based on the satellite signals received from each of the plurality of satellite systems.

Provided is a navigation support system. The navigation support system includes: a camera installed on a ship and configured to acquire an image including an object at sea; an orientation sensor configured to detect a bow direction of the ship; an object sensor configured to detect a position of the object; processing circuitry configured to recognize a region of the object in the image, and calculate a difference between a capturing direction of the camera and the bow direction based on a horizontal in-image position of the object in the image and a direction of the object with reference to the ship.

A ship information exchange device capable of reducing a demodulation processing load is provided. The ship information exchange device includes a receiver, a generator, a detector, and a demodulator. The receiver receives a radio signal. The generator generates reception data of a plurality of channels used for transmission of ship information based on the radio signal. The detector detects a reception level of each of the channels. The demodulator demodulates the reception data. The demodulator determines the reception data to be demodulated according to the detection result of the reception levels.

An autonomous cruising system is capable of discriminating a port sign and a starboard sign without depending on a position of a ship. The system includes processing circuitry that acquires an image generated by a camera installed in a ship. The processing circuitry identifies whether a mode of a lateral buoy included in the image is either a first mode or a second mode. The processing circuitry determines a country to which a position of the ship detected by a position detector belongs. The processing circuitry determines whether description of a sign of the lateral buoy is the port sign or the starboard sign, from the mode of the lateral buoy and the determined country, based on a given correspondence relationship indicative of whether each of the first mode and the second mode corresponds to either one of the port sign and the starboard sign in each country.