Nishinomiya, Japan
Nishinomiya, Japan

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Patent
FURUNO Electrical CO. | Date: 2017-03-22

A radar apparatus (100) for detecting around a ship is provided. The apparatus (100) includes an unstable area detecting module (10) configured to observe a variation in a signal level corresponding to detection data over a plurality of scans, obtain unstableness of the observed detection data, and detect unstable areas (41, 42, 43, 44, 410, 420, 430, 440) based on the unstableness, a determining module (22) configured to measure a size of each of the areas and determine the area as a small target object area (41, 43) when the size of the area is below a given threshold, a processing module (6) configured to process the detection data corresponding to the small target object area (41, 43) to be emphasized when displayed, than the detection data corresponding to the other unstable area (42, 44), and a display unit (8) configured to display the processing result.


Patent
FURUNO Electrical CO. | Date: 2017-03-15

An information display device (100) is provided, which includes a distance setting module (20) configured to set a distance, a closest approach position estimating module (32) configured to estimate a closest approach position (Psa, Psb) of a first ship (S) and a closest approach position (Pa, Pb) of a second ship (Ea, Eb) at a time point when the first and second ships (S, Ea, Eb) approach each other the closest, based on navigational information of the ships (S, Ea, Eb), and a display controlling module (35) configured to cause a display screen to display the estimated closest approach position (Pa, Pb) of the second ship (Ea, Eb), a risk area (Aa, Ab), and current positions of the ships (S, Ea, Eb), the risk area (Aa, Ab) formed into a circle based on the set distance, centering on the estimated closest approach position (Psa, Psb) of the first ship (S).


Patent
FURUNO Electrical CO. | Date: 2017-03-22

A radar apparatus (1) for creating a radar image based on reflection waves caused by radio waves transmitted from an antenna, is provided. The radar apparatus (1) includes a receiver (3) configured to receive the reflection waves of the transmitted radio waves, as reception signals, a suppression processing module (9) configured to suppress levels of reflection signals among the reception signals, each of the reflection signals caused by precipitation, a precipitation reflection visualizing data creating module (15) configured to create data indicating, as a precipitation reflection visualized area (97), an area corresponding to the signals of which levels are suppressed to below a threshold by the suppression processing module (9), and a display image data creating module (16) configured to create display image data indicating on the radar image, the precipitation reflection visualized area (97) created by the precipitation reflection visualizing data creating module (15).


A velocity of a surface current is easily calculated. A surface current estimating device la is provided, which includes a ground velocity calculating module (11) configured to calculate a ground velocity vector of a ship at a target location where the ship is located on the sea, an estimator (12a) configured to receive an input of one or more values of at least one parameter at the target location, and estimate and output, as a log velocity vector of the ship, a value corresponding to one of conditions, the at least one parameter causing an influence on the log velocity vector of the ship, each of the conditions defined by a combination of the received values, and a surface current calculating module (13) configured to calculate the surface current velocity vector of the target location, based on the output value as the log velocity vector estimated by the estimator (12a) and the ground velocity vector calculated by the ground velocity calculating module (11).


Patent
FURUNO Electrical CO. | Date: 2016-08-10

A vehicle control device (10) is provided. The device (10) includes a target bearing calculating module (202) configured to calculate a target bearing of a vehicle based on a direction of a disturbance, a stern bearing calculating module (201) configured to calculate a stern bearing, and a rudder mechanism drive signal determining module (204) configured to determine a rudder angle command so that the stern bearing approaches the target bearing, and determine a rudder mechanism drive signal based on the rudder angle command.


Patent
FURUNO Electrical CO. | Date: 2016-08-24

A radar apparatus (1) is provided. The radar apparatus (1) includes a transmission and reception unit (12) configured to transmit a close distance pulse signal, a medium distance pulse signal, and a far distance pulse signal in an order of the close distance pulse signal, the far distance pulse signal, the medium distance pulse signal, and then the far distance pulse signal, and receive reflection waves of the transmitted pulse signals, the far distance pulse signal having a wider pulse width than the close distance pulse signal, the medium distance pulse signal having a pulse width wider than the close distance pulse signal and narrower than the far distance pulse signal, and a signal processor (13) configured to generate a radar image by using a first detection result and a second detection result.


Patent
Furuno Electrical Co. | Date: 2016-02-17

A velocity calculating device is provided, which can accurately calculate a moving velocity of a movable body without depending on signals obtained externally. A navigation device 1 includes an acceleration acquiring module 10, an angular velocity acquiring module 11, a time difference detecting module 23, and a velocity calculating module 24. The acceleration acquiring module 10 acquires the vertical acceleration of the front wheels or the axle. The acceleration acquiring module 10 acquires a pitch angular velocity of the automobile. The time difference detecting module 23 detects a time difference between the acceleration in the vertical directions and the pitch angular velocity. The velocity calculating module 24 calculates a moving velocity of the automobile based on a rate of a wheelbase 2L with respect to the time difference .


A signal processor (10, 10a, 10b, 10c, 10d, 10e) for processing target echo signal is provided. The signal processor (10, 10a, 10 , 10c , 10d, 10e) includes a filtering module (20) configured to generate a filtered echo signal by extracting echo signal components within a predetermined frequency band from the target echo signal, a high resolution signal generating unit (16, 16a, 16b) configured to generate a high resolution signal based on the target echo signal, and a synthesizing module (21, 23, 21a, 27) configured to synthesize the filtered echo signal with the high resolution signal. The high resolution signal has higher resolution than the filtered echo signal.


A Doppler shift frequency measuring device is provided, which includes a plurality of transmitters respectively configured to transmit a transmission wave, a plurality of receivers provided corresponding to the transmitters, respectively, and configured to receive reception waves that are reflection waves caused by the transmission waves from the transmitters, respectively, and a reception signal processor configured to calculate Doppler shift frequencies of the reception waves by processing reception signals obtained based on the reception waves received by the receivers. The reception signal processor includes a reception circuit configured to generate a synthesized signal by synthesizing processing target signals of which center frequencies of main lobes of power spectra are different from each other, the processing target signals generated based on the reception waves, and a Doppler shift frequency calculating module configured to calculate the Doppler shift frequencies of the reception waves based on the synthesized signal.


A distribution of surface tidal current velocity vectors is estimated within a short period of time. A surface tidal current estimator 10 is configured including a deriving module 11 configured to derive wave-crest velocity vectors at a plurality of positions within a predetermined range of a water surface, each of the wave-crest velocity vectors being a velocity vector of a wave crest on the water surface, and correcting modules 16 and 23 configured to correct each of the wave-crest velocity vectors derived at the plurality of positions by the deriving module 11, based on one of the wave-crest velocity vector derived inside a predetermined area within the predetermined range by the deriving module 11 and an ocean-wave velocity vector in the predetermined area within the predetermined range, the ocean-wave velocity vector being a velocity vector of an ocean wave.

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