JPH0762705B2 - Target display device for precision radar device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landing guidance and control precision approach radar device, and more particularly to a target display device for a precision radar.

[Conventional technology]

Conventionally, in landing guidance and control, a precise approach radar device inputs radar reflected radio signals from the aircraft, which is radar information, as a video signal to the precision instructing device and displays it on a CRT. Controllers were supposed to monitor this video display and guide the runway by identifying the aircraft of interest while in constant contact with the pilot by radio telephone.

[Problems to be Solved by the Invention]

In the conventional aircraft display method of the precise inspection radar device described above, since the radar reflection signal from the aircraft is displayed on the precise observation instruction device as a video, the controller always displays the video on the screen of the precise inspection instruction device. It is not easy to identify the target because the target must be identified by communicating with the pilot by radio telephone and grasping the movement while monitoring, and there is no auxiliary display showing the target on the screen. In addition, there is a drawback that it is difficult to guide a plurality of targets to enter at once.

An object of the present invention is to provide a target display device of a precision radar device that solves the above problems.

[Means for solving problems]

In order to achieve the above-mentioned object, the target display device of the precise measurement radar device according to the present invention has an elevation angle calculation unit, a comparator, a data selection unit, a display control unit, and a precise measurement instruction unit. A target display device for a precision radar device, which displays a target image displayed on a screen based on position data from the measurement radar by superimposing character symbols for target identification obtained on the search radar. Outputs the position data including the elevation value of the target to be monitored and the video signal for displaying the target on the screen based on the position data. The search radar includes the elevation value of the target to be monitored. It outputs the position data that does not exist and the identification signal that identifies the target.The elevation angle calculation unit calculates the distance and height of the target from the position data obtained by the search radar. And the target elevation angle value calculated by the elevation angle calculation unit, the target elevation angle value measured by the precise measurement radar, and the precise measurement radar. The azimuth angle of the target by the search radar and the azimuth angle of the target by the search radar are respectively compared, and when the data match, the select signal is output to the data select section. It receives the signal and outputs the position data and the identification signal from the search radar to the display control unit. The display control unit, based on the position data from the search radar, outputs the video signal output from the precision radar. The display signal for displaying the target identification signal obtained by the search radar in characters or symbols at the position of the target is issued to the precise measurement instruction section. In response to the command from the display control unit, the precise measurement instruction unit displays the target image displayed on the screen based on the video signal from the precise measurement radar, and the characters based on the target identification signal obtained by the search radar, The symbols are displayed in a superimposed manner.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, the present invention obtains the elevation angle value of the target based on the target distance and altitude data among the position data (target distance, azimuth angle, altitude) based on the secondary surveillance radar information of the search radar system, The obtained elevation angle value of the target and the elevation angle value of the target by the precision radar system, and the azimuth angle of the target by the search radar system and the azimuth angle of the target by the precision radar system are respectively compared, and the output of the precision radar system is compared. The characters and symbols for identifying the target obtained by the search radar system (such as the flight number of the target aircraft to be monitored) are superimposed on the target image.
Elevation angle calculation unit 3, comparator 4, data selection unit 5,
It has a display control unit 6 and a precise measurement instruction unit 7.

The precision radar 2 outputs position data including the elevation angle value of the target to be monitored and a video signal for displaying the target on the screen based on the position data. The position data includes the antenna scanning angle. Signal and antenna beam direction signal are included.

The search radar 1 outputs position data that does not include the elevation value of the target to be monitored and an identification signal for identifying the target. The search radar 1 is a beacon code and altitude information of the aircraft obtained by the secondary monitor radar. And flight plan information is processed by computer to calculate the target distance, direction,
The position data composed of altitude data and an identification signal for identifying the target such as the flight number of the target aircraft to be monitored are output.

The elevation angle calculation unit 3 calculates the elevation angle value of the target from the data of the distance and altitude of the target of the position data obtained by the search radar 1. The elevation angle calculation unit 3 triangulates the straight line connecting the surveillance position and the target in flight from the distance of the target in the horizontal direction from the surveillance position on the ground to the target and the altitude of the target in the vertical direction from that position. The angle formed by the horizontal plane is calculated as the elevation value. A general-purpose trigonometric method is used as the method of calculating the elevation value.

The comparator 4 includes the elevation angle value of the target calculated by the elevation angle calculation unit 3, the elevation angle value of the target actually measured by the precision radar 1, and the azimuth angle of the target by the precision radar 2.
The azimuth angle of the target by the search radar 1 is compared with each other, and when the data match, a select signal is output to the data select section 5.

The data selection unit 5 receives the selection signal from the comparator 4 and outputs the position data and the identification signal from the search radar 1 to the display control unit 6.

The display control unit 6 converts the target identification signal obtained by the search radar 1 into characters or symbols at the position of the target in the video signal output from the precise radar 2 based on the position data from the search radar 1. The display signal is displayed to the precise measurement instructing section 7.

In response to the command from the display control unit 6, the precise measurement instruction unit 7 displays characters on the screen of the target image displayed based on the video signal from the precise measurement radar 2 based on the target identification signal obtained by the search radar. The symbol is displayed in a superimposed manner.

In the embodiment, the elevation angle calculation unit 3 uses the distance and altitude of the target of the position data output from the search radar 1 to obtain the elevation value of the aircraft that is the target of the monitoring target by trigonometry. This elevation value data is position data (target distance, altitude) obtained by the search radar 1.
And is supplied to the comparator 4.

The comparator 4 receives the angle signal, the azimuth antenna elevation angle signal, and the elevation antenna azimuth signal output from the precision radar 2, and receives the elevation angle value of the target calculated by the elevation angle calculation unit 3,
The elevation value of the target measured by the precision radar 2, and
Azimuth of target by precision radar 2 and search radar 1
And the azimuth angle of the target are compared with each other, and if the data match, a select signal is output to the data select unit 5. As described above, the comparison is performed with respect to the elevation value and the azimuth angle of the target. First, the elevation angle value of the target is compared by selecting one of the position data output from the precision radar 2 for the elevation antenna direction, and the angle signal (elevation value) of this elevation antenna and the elevation value calculated by the elevation angle calculation unit 3 are selected. It is compared and it is determined whether the data match, and a select signal is output. Next, comparing the azimuth angle of the target,
An angle signal (azimuth angle) is selected from the position data output by the precise radar 2, and this is compared with the azimuth angle data of the target by the search radar 1, it is determined whether they match, and a select signal is output. To do.

When the data select unit 5 receives the select signal output from the comparator 4, the position data from the search radar 1 that matches the video signal output from the precision radar 2 when the comparator 4 outputs the select signal The identification signal and are selected, and these are output to the display control unit 6.

The display control unit 6 converts the selected data into a signal for displaying on the precise measurement instructing unit 7. The precise measurement instruction unit 7 receives a command from the display control unit 6 and displays a target image displayed on the screen based on the video signal from the precise measurement radar 2 to display characters based on the target identification signal obtained by the search radar 1. Overlapping symbols. In the display example, as shown in FIG. 2, the video signal 8 from the precision radar 2 and the data 9 from the search radar 1 are divided into high and low regions and azimuth regions for each target.

〔The invention's effect〕

As described above, according to the present invention, in addition to the target video display of the precision radar, the secondary surveillance radar target processing data is selected based on the target video distance data of the precision radar, the azimuth of the precision radar antenna, and the elevation scanning information. By displaying the characters, it is possible to easily identify the corresponding target, and it is possible to safely control the approach of a plurality of aircraft at the same time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a display example on a screen of a precise measurement instruction unit according to the present invention. 1 ... Search radar, 2 ... Precision radar 3 ... Elevation angle calculation unit, 4 ... Comparator 5 ... Data selector, 6 ... Display control unit 7 ... Precision measurement instruction unit, 8 ... Precision radar Target video 9 ... Target processing data

Claims (1)

[Claims] 1. A target image displayed on a screen based on position data by a precision radar, comprising an elevation angle calculation unit, a comparator, a data selection unit, a display control unit, and a precision measurement instruction unit. A target display device of a precision radar device for displaying a character symbol for target identification obtained on a search radar in a superimposed manner, wherein the precision radar is position data including an elevation angle value of a target to be monitored, It outputs a video signal that should display the target on the screen based on the position data.The search radar outputs position data that does not include the elevation value of the target to be monitored and an identification signal that identifies the target. The elevation angle calculation unit calculates the elevation angle value of the target from the data of the distance and altitude of the target among the position data obtained by the search radar. Is the elevation angle value of the target calculated by the elevation angle calculation unit, the elevation angle value of the target measured by the precision radar, and the azimuth angle of the target by the precision radar, and the azimuth angle of the target by the search radar, respectively. It compares and outputs a select signal to the data select section when the data match, and the data select section receives the select signal from the comparator and displays and controls the position data and the identification signal from the search radar. Based on the position data from the search radar, the display control unit outputs the target identification signal obtained by the search radar to the position of the target in the video signal output from the precision radar. A display signal to be displayed in characters or symbols is issued to the precise measurement instructing unit. The precise measurement instructing unit receives a command from the display control unit, Of the target image displayed on the screen based on a video signal, the target display device Seihaka radar apparatus characterized by characters based on the target identification signal obtained search radar, the symbol is to superimposed.