Furuno Electric Company Limited

Yuriko Onishi

Satoshi Misonoo

Osamu Kubota

Takanori Satoh

Hiroyuki Toda

Masato Okuda

Shinji Ishihara

Mitsuhiro Inouchi

Rika Shiraki

Takuto Hazama

Masaaki Matsubara

Katsuhisa Yamamoto

Jérôme Dubuis

Yuji Onishi

Takashi Matsumura

Yoshihiro Nishiyama

Youhei Kinoshita

Makoto Iwamoto

Shinya Tanimura

An underwater detection device is provided, which includes an echo signal processing module configured to acquire echo signals and detect signal levels of the echo signals corresponding to water depths, the echo signals being reflection waves caused by ultrasonic waves transmitted underwater, a detection image display controlling module configured to display on a display unit a detection image indicating the signal levels of the echo signals corresponding to the water depths and placed in a chronological order, and a menu display controlling module configured to display first superordinate menu buttons on the detection image displayed on the display unit, one of the first superordinate menu buttons displayed in one of end sections of the detection image where oldest information is displayed, the rest of the first superordinate menu buttons displayed to extend from the one of the first superordinate menu buttons in one of depth directions and time axis directions.

Underwater detection device

This disclosure provides a detection device, which includes a transceiving module for transmitting a transmission signal and receiving an echo caused by the transmission signal to output a reception signal according to an intensity of the echo, a memory module for storing the reception signals for a plurality of measurements, and an interference detecting module for detecting an interference signal from the reception signals, the interference detecting module determining that the reception signal contains the interference signal when the reception signal has an intensity difference with the previous reception signal by more than a predetermined threshold for over a reference time period in one measurement.

Detection device

An underwater detection system is provided that can effectively use a discrimination result. A fish detector of the system is configured to implement a discrimination function including a fish species discrimination function; however, a fish detector and a sonar of the system do not comprise such a discriminator including a fish species discriminator. The fish detector transmits various discrimination results such as fish species discrimination, etc., through an onboard LAN to the fish detector or the sonar. The fish detector and the sonar superimpose various received discrimination results on the detection result of the device itself and display them on a display.

This disclosure provides a detection device, which includes a transceiver for transmitting a transmission signal and receiving an echo caused by the transmission signal to output a reception signal according to an intensity of the echo, the reception signal in one measurement including one or more reception signals, and an interference detector for detecting an interference signal from the one or more reception signals. The interference detector performs a switching operation of switching interference detection processing between first interference detection processing and second interference detection processing that has a higher interference detection sensitivity than in the first interference detection processing, according to the number of the reception signals detected as the interference signals.

Detection device and computer readable media storing detection program

This disclosure provides a target object detection device for outwardly transmitting a detection pulse and detecting a target object based on a returned reception signal. The device includes a first peak holding module for extracting, at every predetermined cycle, a maximum value of the reception signals obtained in the predetermined cycle, a second peak holding module for extracting, at the same predetermined cycle, a minimum value of the reception signals obtained in the predetermined cycle, and a target object determiner for determining a level rising and a level falling of the reception signal indicating the target object by using a gradient between the minimum and maximum values extracted at different peak holding positions.

Method and device for detecting target object

This disclosure provides a detection device, which includes a transceiving module for periodically transmitting a detection pulse signal toward a space and receiving a reflection wave from a target object as a reception signal, a signal loading module for generating a distance section row by dividing a given detection distance range into a plurality of distance sections, obtaining reception data by sequentially sampling the reception signal for every distance section, and storing the reception signal in a memory, and an interference processing module for sequentially performing interference removal processing for the reception data of each of the distance sections stored in the memory. The interference processing module includes an interference wave determination module for determining for every distance section whether the reception data of the distance section row including a target distance section is resulting from an interference wave, a signal generating module, if the reception data is determined to be resulting from the interference wave for generating data to be displayed based on one or more reception data other than the reception data in proximity to the reception data at least either in a distance direction or a transmission cycle direction, and if the reception data is determined to be resulting from the reflection wave, for using the reception data as the data to be displayed, and a display module for displaying the data to be displayed.

A sonar emits an ultrasonic wave into the water from a transducer on the basis of a transmission signal outputted from a transmission circuit, receives an echo reflected in the water with the transducer and converts the echo into an electric signal, and displays underwater information on a display unit on the basis of an echo signal extracted by processing the electric signal. A tailing signal removing unit for removing a tailing signal and extracting only the echo signal is provided in the sonar such that a video of a surface layer fish shoal is clearly displayed on a screen of the display unit without being hidden by a video of the tailing signal.

Sonar

A quantitative echo sounder includes delay circuits, phase correction circuits, an incidence angle calculator and a directivity correction unit. The delay circuits adjust transmission start timing or phases of acoustic waves radiated by individual vibrating elements based on pitch and roll angles measured by a motion sensing device so that the direction of an acoustic axis of a transmitting beam matches a sounding direction. The phase correction circuits adjust phases of received echo signals based on the pitch and roll angles so that the direction of an acoustic axis of a receiving beam matches the sounding direction. The incidence angle calculator calculates echo signal incidence angle with respect to the sounding direction from phase differences among receiving beam signals obtained by four vibrating element groups. The directivity correction unit corrects a measured target strength by using the echo signal incidence angle calculated by the incidence angle calculator.

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Nishinomiya, Japan

Yuriko Onishi