JPS59111073A - Digital radar video generator - Google Patents

Abstract

PURPOSE:To facilitate data correction and to make it possible to generate even several kinds of patterns without increasing data memory parts by enabling video fabrication by data fabricated in an external calculator, by constituting a data memory part from RAM while adding a calculator interface. CONSTITUTION:A data memory part 3 is constituted of RAM and informations for showing data for fabricating an address table and video and the completion of data are inputted from an external calculator. When a data transmission demand signal 59 is outputted from this apparatus or an external calculator side, a control part 5 puts in operation for writing data in the data memory part 3 and data inputted to a calculator interface part 8 from the external calculator by a transmission bus line 58 is written in the data memory part 3. When information for showing the completion of data is inputted, the control part 5 enters operation for fabricating video. As mentioned above, because data from the external calculator can be used by adding the calculator interface part, the fabrication or correction of data can be performed by the external calculator and becomes extremely easy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital radar video generator for displaying a fixed pattern, such as a map image, on a radar indicator superimposed on real-time radar video.

A conventional device of this type is shown in FIG.

In the figure, (1) is an azimuth change pulse (hereinafter referred to as ACP) based on the orientation of the radar antenna and an azimuth reference pulse (hereinafter referred to as ARP) output when the radar antenna is in the orientation O0. The azimuth information creation section (2) creates the zero time signal (hereinafter referred to as ZT), which is the transmission reference signal of the radar.
(referred to as T) is a distance information creation unit that creates distance information based on the distance; (3) is composed of a ROM and stores one screen of data; (1L14) is a video creation unit that outputs a video; 5) is a control section that determines the operation of each section. Also, in the signal line, flashes are ACP and ARP,
(5υ is the ZTT, the bag is the direction information, the furrow is the distance information, the 1 is the address line, (4) is the data line, (6Q is the video output signal, and (57) is the video output.

Next, the operation will be explained. The data storage section (3) is RO
As shown in Fig. 2, it consists of an address table section (6) indicating the start address of the section where data to be displayed in that direction is stored, and a data section +71, where the data contains distance information. and control information. The direction information creation unit (1) counts the ACP based on the ARP.

Creating direction information. Assuming that the information is θ, the control unit (5) first reads out from the address table unit (6) of the data storage unit (3) the start address of the location where data to be displayed in the direction θ is stored.

Next, the control unit (5) reads out one piece of data to be displayed using the above-mentioned start address.

On the other hand, the distance information creation unit (2) creates distance information based on ZTTJυ, and the control unit (5) calculates the distance between this distance information and the data read from the data storage unit (3). The information is compared, and when they match, a video output signal f569 is output. When the video creation section (4) receives the video output signal (3), it outputs the video according to the control information included in the display data. When the video is output, the control section (5) reads the next data from the data storage section (3), and the operations after the distance information comparison are repeated.

When the display of all data in the direction θ is finished, the operation is stopped, and when the direction information @ sister reaches θ+1, the operation from the beginning is repeated.

Conventional digital radar video generators are configured as described above, so it is necessary to write the data needed to create the video into the ROM in advance, which makes it difficult to modify the data, and there are several types of In order to generate patterns, it is necessary to have as many data storage units as there are patterns.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and the data storage section is configured with a RAM,
By adding a computer interface section and making it possible to create videos using data created on an external computer, data can be easily modified and several types of patterns can be created without increasing the data storage section. The purpose is to provide a digital radar video generator that can generate

An embodiment of the present invention will be described below with reference to the drawings. Third
In the figure, (8) is a computer interface unit for receiving data transmitted from an external computer, and the rest is the same as the conventional device.Also, regarding the signal line,
The state is the transmission path line, the garden is the data transmission request signal, and the rest is the same as the conventional device.

Next, the operation of the present invention will be explained. Data storage section (3
) is configured with RAM, and its configuration is the same as that of conventional devices. It is also assumed that an address table, video creation data, and information indicating the end of the data are input from the external computer.

Data transmission request signal from this device or external computer side
) is output, the control unit 15) begins an operation of writing the data to the data storage unit (3) and transfers the data from the external computer to the computer interface unit (8) via the transmission path line (to).
) Write the input data to the data storage section (3).

When the information indicating the end of data is input manually, the control section (5) starts the operation of creating a video. The subsequent operations are the same as those of the conventional device.

In the above embodiment, it is assumed that the address table, video creation data, and information indicating the end of the data are transmitted from the external computer.
Subsequently, data to be displayed in that direction may be transmitted, and at the end of the data for all directions, information indicating the end of the data may be transmitted. In this case, a data number counting section may be added to the present device to detect the number of data in each direction and write the data to the data storage section (3) while creating an address table.

Furthermore, in the above embodiment, when the data transmission request signal (59) is output during video output, the video output is interrupted until the data transfer from the external computer is completed. Two systems of data storage sections may be provided, and the control section (5) may be separated into a data transfer control section and a video output control section.

In this case, when the data transmission request compensation measurement is issued, the data transfer control section controls the total: t, regardless of the video output control section.
d The data is written from the interface unit (8) to the data storage unit on the side not used by the video output control unit. When the writing is completed, the data transfer control unit outputs a write completion signal to the video output control unit. When the video output control section receives this signal, it switches the data storage section and continues the video output operation. With the above configuration, the data transmission request signal (59) can be sent during video output. The video output will not be interrupted.

As described above, according to the present invention, in a digital radar video generator, the data storage section is configured with λAM, and a computer interface section is added to make it possible to use data from an external computer. Data can be created or modified using an external computer, making data creation or modification extremely easy. Furthermore, even when generating several types of no-turns, it is only necessary to transfer data from an external computer each time the pattern is switched, so there is no need to provide data storage units for the number of patterns.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional digital radar video generator, FIG. 2 is a block diagram of a conventional data storage section, and FIG. 3 is a block diagram showing a digital radar video generator according to an embodiment of the present invention. (1)...Azimuth information creation section, (2)...Distance information creation section, (3)...Data storage section, (4)...Video creation section, (5)...Control section , (8)...Computer interface section. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A computer interface section for receiving data transmitted from an external computer; a data storage section for storing data received by the computer interface section; a distance information creation unit that creates radar distance information from a radar transmission reference signal; and distance information and control of data in the data storage unit that corresponds to the orientation information from the radar transmission reference signal. A digital radar video generator, comprising: a video creation section that creates a video from information; and a control section that controls the operations of each of the above sections, and that creates a video using data created by the external computer. (2) The data storage section has two systems, and the control section includes a data transfer control section that controls a data transfer operation from the computer interface section to the data storage section;
2. The digital radar video generator according to claim 1, further comprising a video output control section that controls video output operation so that video output is not interrupted when data is changed.