Abstract: An underwater detection device for detecting underwater by transmission and reception of an ultrasonic signal is provided. The device includes a transmission module for transmitting the ultrasonic signal underwater, a reception module for receiving an echo signal of the transmitted ultrasonic signal, a bottom detection module for detecting a bottom based on the echo signal from the bottom, a bottom-sediment determination module for calculating probabilities of the bottom sediment on how much the bottom sediment contains each of predetermined bottom sediment types based on the echo signal and a bottom-sediment display module for displaying a texture representing each of the bottom sediment types below the bottom being displayed based on the probabilities.

Abstract: This disclosure provides a slot array antenna, which includes an emission waveguide having a conductor surface where emission slot rows are formed and for guiding electromagnetic waves to be emitted from the emission slot rows, each of the emission slot rows having a plurality of emission slots are arrayed in line, and a lattice. The lattice includes a plurality of conductor walls formed in a planer shape so as to extend in a direction intersecting with the conductor surface and repeatedly arranged corresponding to the plurality of emission slots, and a base plate coupling and fixing the plurality of conductor walls thereto, the base plate being fastened to the conductor surface of the emission waveguide.

Abstract: This disclosure provides an antenna device, which includes a waveguide having a rectangular cross-section and formed with a plurality of slots in at least one side face thereof. The plurality of slots are arranged in a tube axis direction. At least one of the plurality of slots is formed with a predetermined inclination angle from a plane perpendicular to a tube axis direction of the waveguide.

Abstract: This disclosure provides a navigation aid device that includes a calculation time setting module for setting two or more calculation points of time for calculating trial information, a ship-concerned information acquisition module for acquiring ship-concerned information including a position of a ship concerned at every predetermined ship-concerned information acquisition time, a ship-concerned trial information calculating module for calculating ship-concerned trial information including the position of the ship concerned at each calculation point of time based on the ship-concerned information acquired at the newest information acquisition time with respect to the calculation point of time.

Abstract: A fishfinder data display device is provided. The display device includes a memory for storing fishfinder data obtained by a fishfinder detecting underwater and a location where the fishfinder data is acquired so as to associate the fishfinder data with the location, a display unit for displaying an image created based on the fishfinder data, and a controller, when an operator performs a specifying operation to a predetermined part of the image displayed by the display unit, for reading the location corresponding to the fishfinder data based on the specified predetermined part of the image from the memory, and causing an autopilot device to execute an autopilot operation with the location as a destination.

Abstract: This disclosure provides an image processing device, which includes an actual trail image memory for storing an actual trail data group indicating absolute changes in position of a target object detected by echo signals obtained corresponding to detection signals transmitted while changing an azimuth direction of the transmission, and a moving target object determination processing module for determining whether the target object detected with the detection signals is a moving target object based on the actual trail data group.

Abstract: This disclosure provides a signal processing device, which includes an echo signal input module for being inputted with echo signals caused by electromagnetic waves emitted from an antenna being reflected on one of more target objects, an echo signal level detecting module for detecting a level of each of the echo signals in association with a distance and an azimuth direction from the antenna, a level change detecting module for detecting a level change between the echo signals from locations which are close to each other where the distances from the antenna are substantially the same but the azimuth directions from the antenna are different, a pattern output module for comparing the level change with a pattern determined in advance to output a level change pattern, and an interference determining module for determining interference based on at least two of the level change patterns.

Abstract: A radar device includes an antenna for acquiring data, an image memory including pixel data groups each arranged in a rectangular coordinate system, for converting the acquired data in a polar coordinate system into pixel data in the rectangular coordinate system and storing the pixel data, a data write module for writing the pixel data in the memory such that, when image data is stored in a display mode, pixel blocks each including M×N pixel data are arranged on the same line in the memory, a scanning direction setting module for setting a raster-scan direction, and a data reading module for reading out the image data by reading out the pixel data arranged on the same line in the image memory according to the raster-scan direction.

Abstract: An example embodiment of the present invention relates to a method and corresponding apparatus that terminates circuit connectivity in a bus by determining location of an instrument on the bus, and based on coupling a terminating resistance to the instrument. The example embodiment may couple a terminating resistance with the instrument placed at the end of a bus by employing at least one male-to-male connector arranged to establish a connection between the female receptacles of the terminating resistance and the bus. In order to determine a state of termination of circuit connectivity in a bus, an example embodiment of the present invention may connect a transceiver to a terminating resistance and determine a state of termination of circuit connectivity in the bus as a function of sensing receive activity in the transceiver.

Abstract: A transceiving device includes a transmission signal generating module for generating a transmission signal that is frequency-modulated by a predetermined frequency sweep width, a transceiver module for transmitting a pulse signal having substantially the same waveform as a waveform of the transmission signal and receiving an echo signal corresponding to the transmission signal from a detection range, and a pulse-compression filter for pulse-compressing the echo signal received by the transceiver module. The pulse-compression filter has an input/output characteristic. The characteristic has, when the pulse-compression filter is inputted with an input signal having substantially the same waveform as the waveform of the transmission signal, a window function shape such that a phase spectrum of an output signal corresponding to the input signal is linear and an amplitude spectrum of the output signal does not have a frequency component other than a frequency band with which a frequency sweep is carried out.

Abstract: This disclosure provides a navigation assisting device, which includes a TT information acquiring module for acquiring target object data by performing target tracking based on an echo received by a radar antenna, an AIS information acquiring module for acquiring target object data based on a Universal Shipborne Automatic Identification System, a maximum-number-of-output-data determination module for determining a maximum number of output data that is the number of target object data that is outputable while the radar antenna revolves once, a priority determination module for performing a priority determination according to a predetermined rule, for the target object data acquired by the TT information acquiring module and the target object data acquired by the AIS information acquiring module, and an output control module for outputting the target object data fewer than the maximum number of output data according to the priorities while the radar antenna revolves once.

Abstract: A harmonic suppression resonator comprises a plurality of waveguide resonators that resonate in TE mode, in which harmonic suppression resonator, adjoining resonators are coupled via a plurality of coupling windows. Four coupling windows 33bc1, 33bc2, 33bc3 and 33bc4 are provided between a resonant region 51b and a resonant region adjoining the resonant region 51b. These coupling windows allow fundamental wave modes of the adjoining resonators to be coupled mainly by magnetically coupling. The coupling windows 33bc3 and 33bc4 allow second harmonic modes of the adjoining resonators to be electrically coupled, and the coupling windows 33bc1 and 33bc2 allow the second harmonic modes of the adjoining resonators to be magnetically coupled. By causing the amount of the electrically coupling and the amount of the magnetically coupling to be substantially equal, the coupling of the second harmonic modes is negated, whereby propagation of the second harmonic is blocked.

Abstract: An existence of multipath is detected accurately based on not only a C/No. A C/No (iv) of a reception signal, a pseudorange PR(iv), and a delta range DR(iv) are acquired (S101). First, as determination processing based on individual measurement values, thresholds are set thereto respectively, and the existence of multipath is detected (S102-S104). Next, as determination processing based on continuous values, an average value C/No(Av) and a standard deviation ?C/No of the C/No, and an average value DV(Av) and a standard deviation ?DV of the difference values are calculated, thresholds are similarly set thereto respectively, and the existence of multipath is determined (S105-S109). Then, if multipath is determined that it does not exist based on the individual measurement values and the continuous values, it is determined ultimately that multipath does not exist (S110).

Abstract: A highly accurate positioning operation is achieved regardless of an existence of multipath. An observed pseudorange ?m(k) is acquired based on reception signals of positional signals (S101). A current determination estimated pseudorange ?mp(k) is calculated based on a previous estimation result (S102). A determination difference value Delta?m(k) is calculated based on the observed pseudorange ?m(k) and the estimated pseudorange ?mp(k) (S103). A determination threshold ?Delta? is calculated based on a C/No of the reception signal and PDOP (S104). If the determination difference value Delta?m(k) is below the threshold ?Delta?, an error variance ??m(k) is calculated using an approximate equation of the C/No (S105(NO)?S106), and if the determination difference value Delta?m(k) is above the threshold ?Delta?, the error variance ??m(k) is calculated based on the threshold ?Delta? (S105(YES)?S107).

Abstract: A disturbance signal removing device is provided. The device includes an antenna for transmitting a modulated pulse signal and a non-modulated pulse signal, and a transmission frequency setter for selectively setting as a transmission frequency band of the modulated pulse signal any one of a plurality of mutually different frequency bands of the modulated pulse signal that are different from a transmission frequency band set to the non-modulated pulse signal. The transmission frequency setter switches between the plurality of transmission frequency bands of the modulated pulse signal.

Abstract: This disclosure provides a sensor image display device, which includes a display unit configured to display a sensor image generated based on a signal acquired by a sensor, a selection user interface for allowing a user to select a partial area from an area where the sensor image is displayed, and a sensor image generator for generating the sensor image by performing different signal processing for the selected area and one or more areas other than the selected area.

Abstract: A radar device includes an antenna, from which a detection signal is transmitted while the antenna being rotated and by which a reflective wave of the transmitted detection signal is received to detect echo data, wherein image data is generated based on the detected echo data, a continuity detecting module for detecting a planar continuity of the currently detected echo data with respect to a pixel concerned in the image data, a behavior data generating module for generating behavior data indicative of a behavior of the echo data for a predetermined number of scans of the past in the pixel concerned based on behavior determination data, and an echo kind determining module for determining a kind of the echo data of the pixel concerned based on the planar continuity and the behavior data.

Abstract: 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.

Abstract: There is provided a synchronization device capable of, even when transmission timings of a plurality of other ships are different, almost reliably synchronizing with the other ships during a transmission of a ship concerned and is also provided a synchronization method. The synchronization device 1, when the ship concerned performs a transmission, obtains timing differences DTi occurring over the past one minute from the transmission timing of the ship concerned (S102) and creates a histogram of the timing differences DTi (S103). The synchronization device 1 selects a class with the highest frequency from classes of the timing differences DTi (S104) and obtains a corrected timing DT? associated with the selected class (S105). The synchronization device 1 corrects a reference timing of the transmission of the ship concerned using the corrected timing DT? and performs the transmission of the ship concerned (S106).

Abstract: A code controller configures a code state at a substantially constant and low storage volume, and at a substantially constant computational processing amount, regardless of which state position a desired code state is present in within the state area of the code states. In one embodiment, a state processor detects the position of a desired code state based on an inputted code phase amount. Based on the detection, state processor performs processing for jumping the code state a predetermined interval, and obtains a specific code state near the code state. The state processor selects the appropriate process from among a process for delaying the code state one state at a time from the obtained code state and a process for transiting the code state one state at a time in the direction opposite the delay direction, transits the code state, and obtains the desired code state.