JPS6089776A - Display device for radio buoy - Google Patents

Abstract

PURPOSE:To recognize sensually the position relation between a radio buoy and a ship at a look by displaying the position of the radio buoy on a CRT graphically together with latitude lines and longitude lines of a wake behind the ship. CONSTITUTION:An arithmetic control part 6 receives position information from various position measuring devices 13 such as a Loran navigation device and a satellite navigation device and converts the position information into CRT information together with the latitude line, longitude line, scale value, etc., calculated on the basis of the position information and a previously specified value. A graphic memory 7 is stored with the CRT information sent from the control part 6 correspondingly to CRT picture elements. A video signal generation part 8 reads the graphic memory 7 synchronously with a synchronizing signal sent from the control part 6 to generate a video signal. A reception part 11 receives a radio wave sent from the radio buoy through an antenna 10 and demodulates Loran time difference data. A receive signal processing part 12 calculates the position of the radio buoy from the Loran time difference and position data on a transmitting station.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention receives a signal representing radio buoy position information from a radio buoy using Loran radio waves, Omega radio waves, Detsuka radio waves, or the like. CR4 along with own ship's wake etc.
The present invention relates to a device for displaying the position of a radio buoy on a display.

Conventionally, the positions of radio buoys and the like have been determined simply by digitally displaying the obtained position data, that is, the data of latitude lines and longitude lines.

Therefore, in order to know the relationship with the own ship's position, that is, the distance and direction between the two, it was necessary to calculate them or plot the position data of the radio buoy on a nautical chart. In this way, it was not previously possible to visually and intuitively know the position of the radio buoy itself and its positional relationship with the own ship.

The present invention provides a radio buoy position display device that graphically displays the position of a radio buoy on a CRT along with the ship's track latitude line, longitude line, etc., and allows the positional relationship between the two to be visually recognized. This is what we provide.

An embodiment of the present invention shown in the drawings will be explained in detail below.

FIG. 1 shows an embodiment of a radio buoy, in which Loran radio waves are used. In the figure, 1 is an antenna for receiving Loran radio waves, and 2 is a Loran reception processing section that amplifies the Loran radio waves induced in the antenna to a necessary level, detects a necessary signal, and obtains the time difference between a set of Loran signals.

3 is a transmission signal processing unit which converts a set of time difference data into a signal necessary for modulating transmission radio waves. 4 generates a transmission signal in a transmission section, modulates and amplifies it with the output of the transmission signal processing section 3, and emits it as a transmission radio wave from a transmission antenna 5.

The transmission radio wave is 1, for example, a frequency of 40 MHz in the ultra high frequency band.
z and F3 modulation can be used.

FIG. 2 shows an embodiment of the position display device of the present invention, which is installed on the own ship's side. Reference numeral 6 denotes an arithmetic control unit, which includes an arithmetic unit, memory, and interface, and is mainly composed of a microprocessor. Receiving position information from various position measuring devices 13 (hereinafter simply referred to as navigation devices) such as Loran navigation devices and satellite navigation devices, latitude lines, longitude lines, and scale values calculated based on this position information and prespecified values. etc. are converted into CRT information. 7 is a graph ink memory which stores the CRT information sent from the arithmetic control section 6 in the graph ink memory corresponding to the CRT pixels.

Reference numeral 8 denotes a video signal generating section which sequentially reads out the graph ink memory 7 in synchronization with the synchronizing signal sent from the arithmetic control section 6 and generates a video signal.

Reference numeral 9 denotes a CRT display which receives the output video signal 5 from the video signal generator 8 and displays the course of the own ship in graphic ink along with latitude lines, longitude lines, scale values, etc. on the CRT. The above-mentioned portions in FIG. 2 are the same as those of a conventional track indicator, but the configuration of the main parts of the present invention will be described below.

10 is a receiving antenna, and 11 is a receiving section which receives radio waves sent from the aforementioned radio buoy and demodulates the - set of Loran time difference data.

12 is a received signal processing section, which includes a microprocessor RAM,
It is composed of a ROM, etc., and calculates and stores the position of the radio buoy, that is, the latitude line and longitude line data, from the - set of Loran time differences and the transmitting station position data (stored in advance) of the Loran signal used.

The position data of this radio buoy is configured to be input to the above-mentioned arithmetic and control section 6, and the KC
It is converted into RT information and displayed on a CRT display 9 via a graphic memory 7 and a video signal generator 8.

At this time, when the reception signal processing unit 12 stores the buoy position at appropriate intervals and outputs it to the arithmetic control unit 6, the buoy position is displayed in graphic ink at the intervals, and its changes indicate the drifting status of the buoy. Become.

In addition, the radio buoys are divided into selected buoys using the cell call method, stored in the received signal processing section 2, and outputted by the arithmetic control section 6, which determines symbols and display colors for each of the divided buoys, and generates a plurality of radio buoys. It is also possible to display the following.

FIG. 3 shows an example of a display on a CRT display. In this display example, the current position of the own ship is indicated by a circle symbol, and the position of one of the radio buoys is indicated by a mouth symbol, which are displayed four times in the corner for a certain period of time, with a dotted line between the latest buoy position and the circle. The connecting △ is an example of the display of the second buoy position. Further, it is possible to digitally display the distance and direction between the own ship and the radio buoy calculated by the arithmetic and control unit 6 as shown in the upper right corner of the screen. In addition,
For this display, if a color CRT display is used, various data can be displayed in different colors to make observation easier and more accurate.

In the above-mentioned embodiment of the radio buoy, the case where Loran radio waves were used was described, but it is also possible to use Omega or Detsuka radio waves instead of Loran radio waves.

Furthermore, even in the case of Loran radio waves, the transmission signal processing section 3 of the radio buoy may convert the Loran time difference into latitude/longitude data before transmitting. In that case, the conversion in the received signal processing section 12 shown in FIG. 2 is not necessary. Of course, it is also possible to use NNS S. In addition to the radio buoy, it goes without saying that a radiosonde can also be applied. Also.

The receiving antenna of the radio buoy can also be used as the transmitting antenna.

As described above, according to the present invention, the position of the radio buoy can be displayed graphically on the screen of the CRT display together with the own ship's track, so the positional relationship between the radio buoy and the own ship can be visually recognized at a glance. Is possible.

Therefore, when the present invention is used in fishing operations using radio buoys such as long lines and drift nets, there are advantages such as being able to intuitively judge fishing patterns, which is useful for efficient fishing and safe navigation.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing the configuration of a radio buoy in an embodiment of the present invention, FIG. 2 is a block circuit diagram showing the configuration of a position display device in an embodiment of the present invention, and FIG.
The figure shows the positional relationship between the radio buoy and the own ship displayed on the screen of the CRT display. 1. Receiving antenna, 2... Loran reception processing section. 3... Transmission signal processing unit, 4... Transmission unit, 5... Transmission antenna, 6... Arithmetic control unit, 7... Graphic memory, 8... Video signal generation unit, 9... CRT display, 10... receiving antenna, 11... receiving section, 1
2... Reception signal processing section. Patent applicant Japan Radio Co., Ltd.

Claims (1)

[Claims] A display device that receives own ship position information from a navigation device such as a Loran navigation device or a satellite navigation device, and displays the own ship's track along with latitude and longitude lines on a CRT display in graphic ink.The position of a radio buoy. What means to obtain information and by what means? a receiver for receiving signals sent from one or more radio buoys, and a radio buoy for transmitting position information of the radio buoys by radio waves; - A signal processing unit that converts the position data of the buoy into position data representing the position ml of the radio buoy, and information on the position change of the radio buoy and the distance between the departure and the radio buoy in the first place 13'; A radio buoy position display device characterized in that -J, Ix (+iii) means for displaying on the CRT display together with the own ship's track etc.