JPH0334706Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a radio direction measuring device that is mounted on a moving body such as a ship and measures the arrival direction of radio waves.

"Prior Art" Conventionally, radio direction finders have been called direction finders and have been widely used and mounted on vehicles such as ships. Conventional radio direction measuring devices use cathode ray tubes to display the direction of arrival of radio waves, the relationship between the direction of arrival of radio waves and the course direction of a ship, and the direction of arrival of radio waves with north as a reference.

``Problems that the invention aims to solve'' Conventional radio direction finders have a cathode ray tube attached to the operation panel as a display, and various operation knobs centering on the cathode ray tube, including a reception frequency setting knob and a double side band. A reception mode setting knob that sets the reception mode according to the type of reception signal such as signal, single sideband signal, Morse code, etc. Displays the arrival direction of radio waves based on north, or the course of a moving object such as a ship. A knob for selecting whether to display the arrival direction of radio waves based on the azimuth, a level meter for indicating the strength of the radio waves being received, etc. are attached to the operation panel.

Since a cathode ray tube is used as a display, the depth of the entire device becomes large, and the area of the operation panel becomes relatively large, which is an obstacle to miniaturization. Furthermore, in order to know the operating mode of the device, one has to look at the setting position of each setting knob, which is troublesome because one cannot check the setting status.

Furthermore, although it is common to have a structure in which reception frequencies can be reserved in advance, the value of the reserved frequency must be written down on paper. There are many channels that can be reserved, up to 100 channels. It is difficult to write down the set frequency values for this purpose on paper.
Furthermore, if the set frequency value is changed, the memo must be rewritten each time, which is also inconvenient.

``Means for solving the problem'' This invention uses a flat panel display as the display, which allows the overall shape of the device to be made thinner, and the flat panel display is configured to display various settings of the device. This is what I did.
As a result, each setting knob can be replaced with one numeric keypad switch. Additionally, the reserved receiving frequencies can be displayed in a table on the flat panel display. For this reason, the configuration is as follows: A. A radio direction measuring device that outputs information on the direction of arrival of radio waves; B. A flat panel that displays the direction of arrival information of radio waves output from the main body of the radio direction measuring device in numerical and graphical displays. A display device; C. A mode display means for displaying the operating status of the radio direction measuring device at another position on the flat panel display; D. A display of the receiving frequency reserved for the radio direction measuring device main body on the flat panel display. and level display means for displaying the intensity of radio waves received by the main body of the radio direction measuring device in a part of the flat panel display.

(Function) According to this invention, the azimuth angle of arrival of radio waves is numerically displayed on the flat panel display, and the azimuth angle of arrival is also displayed graphically.

Furthermore, various setting values set in the main body of the radio direction measuring device are displayed in the margin of the radio wave arrival direction display section. In particular, the values of reserved frequencies are displayed in a table, and when the reserved frequency values are changed, the corresponding display in the table is rewritten with new values. There is no need to write down notes on paper.

``Embodiment'' FIG. 1 shows the overall configuration of a radio direction measuring device according to this invention. FIGS. 2 and 3 show examples of displays of the radio direction measuring device according to this invention.

In FIG. 1, 101 indicates a flat panel display. This flat panel display 101 is driven by a display controller 102, and is shown in FIGS.
A display as shown in the figure is displayed. Display controller 1
02 has a buffer 103 and an input port 104,
A radio direction measuring device main body 106 is connected via 105. A keyboard 108 is attached to the radio direction finder main body 106, and has a structure in which various setting values necessary for the operation of the radio direction finder main body 106 can be inputted from the keyboard 108. The azimuth angle signal source 107 gives a gyro signal to the radio azimuth measuring device main body 106 and inputs shipowner azimuth information. 109 is
An AD converter is shown. The AD converter 109 is given a signal representing the strength of the received signal from the radio direction finder body 106, and the level information of the received signal is AD converted and input to the display controller 102.

In this example, the display controller 102 is provided with a central processing unit 111 for displaying characters and a central processing unit 112 for controlling display of images. Both the central processing units 111 and 112 have ROMs 113 and 11 that store programs.
4 are connected via bus lines 115 and 116, and according to the programs stored in these ROMs 113 and 114, the central processing units 111 and 112
performs the control action. 117 and 118 are RAM
shows. These RAMs 117 and 118 store radio wave azimuth information and shipowner azimuth information input from the radio azimuth measuring device body 106 and the azimuth angle signal source 107. Further, various setting values input from the keyboard 108 are transferred from the radio direction measuring device main body 106, and each setting value is stored in the RAMs 117 and 118.

A character generator 1 is connected to the bus line 115 on the side of the central processing unit 111 for displaying characters.
19 is connected to this character generator 1.
Character pattern information is selected from 19 and transferred to the storage area C of the read refresh memory 121.

In addition to the storage area C, the refresh memory 121 has storage areas A and B for two screens, and stores fixed image information and moving image information in the image information separately in the storage areas A and B.

In other words, the central processing unit 112 for displaying images.
A graphics controller 122 is connected to the bus line 116 on the side, reads fixed image information from the ROM 114 at startup, and writes the fixed image information to storage area A of the refresh memory 121. Along with this, the moving image information is calculated by the central processing unit 112 from the direction information input from the radio direction measuring device main body 106, and converted into image information by the graphics controller 122 based on the result of the calculation. This image information changes in accordance with changes in the radio wave arrival direction, and is transferred to memory area B of the refresh memory 121 as moving image information. Character generator 11
9 and the graphics controller 122 to the refresh memory 121 is performed during the horizontal and vertical retrace intervals of the flat panel display 101. The three memory areas A, B, and C of the refresh memory 121 are simultaneously read out in parallel, and the read image information is ORed in the OR circuit 123 and transferred to the flat panel display 101. The fixed part, video part, and text are displayed simultaneously.

Examples of display are shown in FIGS. 2 and 3. FIG. 2 shows a so-called true display state in which the radio wave arrival direction is displayed with north as a reference. Further, FIG. 3 shows a so-called relative display state in which the direction of arrival of radio waves is displayed with the direction of the ship as a reference.

The flat panel display 101 uses, for example, electroluminescent light-emitting elements, which are arranged in a matrix by selectively driving X-Y lines. The structure is such that the image is displayed by scanning the image line by line and scanning the area line by line. Such flat panel displays are already commercially available.

The symbol 20 in the flat panel display 101
The part with number 0 indicates the fixed display part, 30
Portions with numbers in the 0 range indicate moving image portions. 2
Reference numeral 11 indicates a display section that displays the ship owner's direction. A shipowner azimuth angle display section 212 indicating the shipowner azimuth angle is displayed below the shipowner azimuth display section 211 .

Reference numeral 213 denotes a radio wave arrival direction mode display section that indicates a display mode of the radio wave arrival direction. Figure 2 is
TRUE is displayed, indicating that the radio wave arrival direction is displayed with north as 0°. The azimuth angle display section 214 is located below the radio wave arrival direction mode display section 213.
Place. In the illustrated example, the radio waves are arriving from a 0° direction.

215 indicates a graphic display section. This graphic display section 215 shows a circle 215A and a circle 2
For example, scales 215 are attached at 30° intervals on the periphery of 15.
B and a numerical value 215C representing the angle marked on the scale. These circles 215A, scale 2
15B and angle value 215C are displayed as a fixed pattern.

Video parts 301, 302, inside the circle 215A,
303 is displayed. 301 indicates a mark representing the direction of the moving object. In this example, the shape of the ship is displayed as a mark, and the ship owner's direction of the ship's hull mark 301 is drawn in the direction that matches the direction line 302 indicating the angle displayed on the ship owner's direction angle display section 212. Reference numeral 303 indicates an instruction line indicating the radio wave arrival direction. These hull marks 301 and instruction lines 302, 303 change every moment and are drawn as moving images.

Reference numeral 216 indicates a display section that indicates the operating mode of the radio direction finder main body 106. This mode display section 21
6 includes a memory channel display section 217, a reception frequency display section 218, and a reception mode display section 219.
, a reception bandwidth display section 221, an AGC circuit operation/inoperation display section 222, a scan display section 223 that displays whether or not to automatically sweep and receive a plurality of preset reception frequencies; A time interval display section 224 is provided that defines the time of reception for each reception point in the state.

In the illustrated example, the receiving channel display section 217 shows a state in which the first channel displayed in a reserved receiving frequency table 225, which will be described later, is being received. Therefore, the reception frequency display section 218 displays the reception frequency of the first channel.

The radio direction finder body 106 sets the reception mode depending on whether the received signal is a double sideband signal, a single sideband signal, or a Morse code.
A reception mode display section 219 displays the reception mode.

Bandwidth display section 221 displays the bandpass characteristics set in the receiver. The illustrated example shows a case where it is set to 3KHz. Bandpass characteristics are an example.
There are 3KHz, 1KHz and off states. In the off state, the receiver receives data using its bandpass characteristics.

The AGC circuit operation/inoperation display section 222 displays whether or not the AGC circuit is operating. The illustrated example shows a state set to a non-operating state.

The scan display unit 223 scans each reserved channel displayed in the frequency table 225 one by one and displays whether or not automatic reception is to be performed. The example shown in the figure shows a state in which it is set to off and reception is fixed to the first channel. The time interval display section 224 displays the reception time for each reception point in the automatic reception state. Normally, a time of 5 or 10 seconds from the stop is set.

The reception frequency table 225 is the radio direction measuring device main body 10
6 displays the reserved receiving frequency. In the illustrated example, the set frequencies of channels 1 to 20 are displayed, but by giving a page change command from the keyboard 108, the table of channels 21 to 40, the table of channels 41 to 60, and the table of channels 61 to 80 are displayed. Tables and tables for channels 81 to 100 can be displayed respectively.

226 indicates a received radio wave level display section. This level display section 226 has a frame 227 and a frame 227.
A scale 228 and a character part 229 are drawn as fixed parts, and a bar graph 304 that expands and contracts up and down according to the level of the received signal is drawn in the frame 227 according to display data using cursor picture elements from the character generator. Displayed as a video section. The bar graph 304 in this level display section indicates the level of the received signal.
AD converter 109 performs AD conversion and inputs,
The AD conversion information is given to the character generator 119 via the central processing unit 111, where it is converted into pixels for drawing a bar graph using pixels for cursor display, and stored in the storage area of the refresh memory 121. Written to C.

FIG. 4 shows a flowchart of a program for executing control operations of the display controller 102. In this step, the graphics controller 123 is initialized. The refresh memory 121 is completely cleared in step. The wireless direction measuring device main body 106 and the direction signal line 107 are connected in steps.
Import data from. In the step, it is determined whether the display format read in the step has been changed. Immediately after the initial settings are made, it is determined that the display format has been changed and the process moves to step. In this step, it is determined whether the display format is relative. When the display format is relative, the process moves to step to read data necessary for relative display, and in step writes fixed pattern data to memory area A of the refresh memory 121.

If the display format is true, the data necessary for true display is read in step, and the data is written in memory area A of refresh memory 121 in step.

In the step, moving image data is written into memory area B of the refresh memory 121. The pattern written in the refresh memory 121 in step is read out and given to the display 101 for display.

In the step, it is determined whether or not to continue the display.If the display is to be continued, the process returns to the step. When a display stop command is given, the process moves to step and waits until a display restart command is given. When a display restart command is given, the process returns from step to step and starts from the initial settings.

"Effects of the Invention" As described above, according to this invention, since a flat panel display is used as the display, the overall shape of the radio direction measuring device can be made thinner. In addition, the flat panel display displays the direction of arrival of radio waves and the direction of the ship owner, as well as various settings necessary for the radio direction finder, and the reserved frequencies are displayed as a table, making it easy to operate. All necessary information can be displayed.
Furthermore, since various setting values can be entered using a common keyboard, only the display and keyboard need be placed on the front of the device. Therefore, the overall shape of the device can be made compact. Further, since the flat panel display 101 does not require high voltage unlike a cathode ray tube, a high voltage generation circuit is not required, and miniaturization can also be achieved in this respect. Furthermore, this invention has a structure in which the fixed display portion and the moving image portion are processed separately as a display method, so that the processing speed of the moving image portion in particular can be increased. As a result, it is possible to follow changes in the direction of arrival of radio waves and changes in the direction of the ship owner and display them in response to high speed.

Furthermore, since the reserved frequency values are displayed in a table, it is convenient because the reserved frequencies can be easily read. In addition, any page can be displayed by specifically turning the page. Therefore, many preset frequency values can be displayed. In particular, when a reservation setting value is changed, the changed value is displayed, which has the advantage of making management easier compared to writing notes on paper.

In the above description, the mobile object is a ship, but it can also be mounted on a vehicle other than a ship, such as a car.

[Brief explanation of the drawing]

Figure 1 is a block diagram for explaining one embodiment of this invention, Figures 2 and 3 are front views showing examples of the main parts of this invention, and Figure 4 shows the operation of the device according to this invention. This is a flowchart for explanation. 101... Flat panel display, 102...
Display controller, 103... Buffer, 104, 10
5... Input port, 106... Radio direction measuring device body, 107... Direction signal source, 108... Keyboard, 109... AD converter, 111, 112...
...Central processing unit, 113, 114...ROM, 1
15,116...bus line, 117,118...
...RAM, 119...Character generator,
121... Refresh memory, 122... Graphic controller, 211... Heading direction display section, 212... Heading angle display section, 213...
Radio wave arrival direction display mode display section, 214... Radio arrival direction angle display section, 215... Graphic display section, 216... Mode display section, 225... Reservation setting frequency table, 226... Level display section.

Claims (1)

[Scope of Claim for Utility Model Registration] A. A radio direction measuring device that measures the direction of arrival of radio waves, and B. A flat panel that displays information on the direction and angle of arrival of radio waves output from the radio direction measuring device using numerical values and graphics. a display; C mode display means for displaying the operating status of the radio direction measuring device at another position on the flat panel display; and D mode display means for displaying the reception frequency reserved on the radio direction measuring device on the flat panel display. A radio direction measuring device comprising: a set frequency display means for displaying a table; and a level display means for displaying the intensity of radio waves received by the main body of the radio direction measuring device on the flat panel display.