JPH07167941A - Display method and device for precision measuring approach radar - Google Patents

Abstract

PURPOSE:To establish a precision measuring radar display method which can at a glance acknowledge a dislocation of an airplane using the elevation/azimuth(EL/AZ) display. CONSTITUTION:Calculation is made for a dislocation of an ariplane relative to a glide path curcor 10 on the elevation(EL) side and a course line curcor 20 on the azimuth(AZ) side. The obtained dislocation data is converted into an orthogonal coordinate system whose X- and Y-axis extend in the EL direction and AZ direction, and the position 133 of airplane is displayed using X- and Y- orthogonal axes which are a glide path curcor 132 and a course line curcor 131. The resuit is displayed in part of an EL/AZ display screen as an airplane position monitor 13. This monitor 13 is located in the neighnorhood of the airplane data (EL) 11 on the EL screen 1 and moves in assiciation with movement of the airplane data 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air traffic control radar,
Particularly, the present invention relates to a display method and a display device of a precision approach radar (PAR).

[0002]

2. Description of the Related Art A precise approach radar obtains three-dimensional position information of an aircraft in a landing position by three-dimensionally scanning a space by using a high-level antenna and a azimuth antenna installed near a runway. ing. This position information is used in order to easily recognize the position deviation of the aircraft from the approach road (course line) and the descent path (glide path).
n) / AZ (Azimuth) method.

FIG. 4 is a schematic diagram showing a conventional EL / AZ display method. In the EL / AZ display, the glide path cursor 10 is calculated on the EL screen 1 and the course line cursor 20 is calculated and displayed on the AZ screen 2 based on the parameters of the map data input from the keyboard. On this screen, the position data of the aircraft, which is periodically received by the two antennas, is subjected to coordinate calculation and displayed. That is, the high order of the aircraft is the aircraft data (EL) 11 on the EL screen 1, and the heading is the aircraft data (AZ) 21.
Are displayed on the AZ screen 2. In addition, the positional deviation of the aircraft is determined by the aircraft data (EL) 11 and (A
Z) 21 is displayed as each positional deviation from the glide path cursor 10 and the course line cursor 20.

While watching such an EL / AZ display, the controller guides the aircraft to land along the glide path and the course line.

[0005]

However, in the conventional precision radar display device described above, the deviation in the EL direction of the aircraft is due to the difference between the data (EL) 11 on the EL screen 1 and the glide pass cursor 10, and the deviation in the AZ direction is caused. Since the deviation is separately displayed by the difference between the data (AZ) 21 on the AZ screen 2 and the course line cursor 20, the controller must judge the positional deviation of the aircraft by looking at the two screens. For this reason, the positional deviation of the aircraft could not be recognized at a glance.

An object of the present invention is to provide a precise radar display method and display device capable of recognizing the position shift of an aircraft at a glance by EL / AZ display.

[0007]

A method of displaying a precise approach radar according to the present invention calculates a glide path cursor on the EL side and a course line cursor on the AZ side based on given map data, and calculates the The positional deviation between the position data and the glide path cursor and the course line cursor is calculated on the EL side and the AZ side, respectively, and the positional deviation data is converted into an orthogonal coordinate system in the EL direction and the AZ direction. It is characterized in that the displacement data converted into the orthogonal coordinate system with the course line cursor as an XY orthogonal axis is displayed on a part of the EL / AZ display screen.

Further, the display device of the precise approach radar according to the present invention is a storage means for storing the EL side glide path cursor and the AZ side course line cursor calculated based on the given map data, and the aircraft. Position data and the position shift calculation means for calculating the position shift between the glide path cursor and the course line cursor on the EL side and the AZ side, respectively, and converting the position shift data into an orthogonal coordinate system in the EL and AZ directions. And a conversion means for storing the data in the storage means, and the positional deviation data converted into the Cartesian coordinate system is read from the storage means, and the EL / A is used with the glide path cursor and the course line cursor as orthogonal axes.
Display means for displaying the read positional deviation data on a part of the Z display screen.

[0009]

[Function] The positional deviation of the aircraft with respect to the glide path cursor and the course line cursor set by the map data is converted into the orthogonal coordinate system, and the glide path cursor and the course line cursor are used as the orthogonal coordinate axes to monitor a part of the EL / AZ display screen. indicate.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a display method according to the present invention. FIG. 1 (a) is a schematic view showing the whole EL / AZ display in this embodiment, and FIG. 1 (b) is a part thereof. It is an enlarged view of an aircraft position monitor.

As shown in FIG. 1A, on the EL screen 1 and the AZ screen 2, along with the normal glide path cursor 10 and the course line cursor 20, data (EL) showing momentarily the position of the aircraft in the landing position is displayed. ) 11 and (AZ) 21
Are displayed respectively.

Further, an aircraft position monitor 13 is displayed near the aircraft data (EL) 11 moving on the EL screen 1.

As shown in FIG. 1B, the aircraft position monitor 13 displays a monitor glide path cursor 131 and a monitor course line cursor 132 as orthogonal coordinate axes, and the aircraft position 133 is displayed there. . Therefore, the aircraft position monitor 13 makes it possible to recognize at a glance how far the aircraft is from the glide path and the course line.

For example, in the state shown in FIG. 1, the EL screen 1
In, the aircraft data (EL) 11 is shifted to the upper side with respect to the glide pass cursor 10, and the aircraft data (AZ) 21 is shifted to the right side with respect to the course line cursor 20 on the AZ screen 2. This misalignment state is, as shown in FIG. 2B, a glide path cursor 131 (Y axis) and a course line cursor 13 displayed as orthogonal axes.
It is expressed as one point (aircraft position 133) on the plane of 2 (X axis). Therefore, if the aircraft position 133 is at the intersection of the glide path cursor 131 and the course line cursor 132, it indicates that the aircraft is in the optimum landing posture.

If the aircraft position monitor 13 is displayed on the EL screen 1 so as to move together with the aircraft data (EL) 11, it is possible to recognize the positional deviation more quickly and surely.

Next, the structure and operation of one embodiment according to the present invention that enables the EL / AZ display will be described.

FIG. 2 is a block diagram showing an embodiment of a display device according to the present invention, and FIG. 3 is a flow chart showing a data processing procedure of this embodiment.

In FIG. 2, first, map data such as a glide path and a course line, which is an aircraft landing guidance course, is input from the keyboard 201, and the map data is taken into the processor 203 via the keyboard interface circuit 202, Data processing for EL / AZ display is performed and written in the memory 206.

Further, aircraft position data (EL angle, A
(Z angle, distance, etc.) is the input / output interface circuit 20.
5, the data processing shown in FIG. 3 is performed by the processor 203, and the EL / AZ position data as a result is written in the memory 206. Since the position data of the aircraft is regularly input, the EL / A of the memory 206
The Z position data is also updated regularly.

The EL / AZ map data and the position data written in the memory 206 are displayed on a display device 208 such as a CRT via a display circuit 207.

The aircraft position data input from the radar device 204 is processed by the processor 203 in the procedure shown in FIG. First, the processor 203 inputs the EL angle θ ₁ , the AZ angle θ ₂ , and the distance R as aircraft position data (S 101), and the glide pass cursor angle θg (R) at the distance R and the course line cursor angle θc ( R) and R) are calculated according to the following equations (S102, S103).

Θg (R) = sin ^-1 [{1852 ・ R ・ sin (GP) + L1 ・
sin (TD)} / {L1 + 1852 ・ R}].

Θc (R) = ± sin ⁻¹ {L2 / (L1 + 1852 ・
R)}.

Next, the amount of deviation ΔEL in the EL direction of the aircraft
= Θ ₁ −θg and the shift amount ΔAZ = θ ₂ −θc in the AZ direction (S104), and the shift amounts ΔEL and Δ
AZ is converted into an XY coordinate system in which the EL direction is the Y axis and the AZ direction is the X axis (S105), and is written in the memory 206 (S106).

The shift amount ΔEL converted to this XY coordinate system
By reading out and ΔAZ from the memory 206 and displaying them, as shown in FIG.
It is possible to display the displaced aircraft position 133 on the aircraft position monitor 13 with the 1 and the glide path cursor 132 as the XY coordinate axes.

[0027]

As described in detail above, the precise radar display device according to the present invention converts the positional deviation of the aircraft with respect to the glide path cursor and the course line cursor set by the map data into the orthogonal coordinate system, and the EL / AZ is displayed on the monitor on a part of the display screen. This makes it possible to instantly recognize the positional deviation of the aircraft from the landing guidance course at a glance and greatly contribute to the safety of the aircraft when landing.

[Brief description of drawings]

1A and 1B show an embodiment of a display method according to the present invention, FIG. 1A is a schematic diagram showing the entire EL / AZ display in this embodiment, and FIG. 1B is a part of the aircraft position. It is an enlarged view of a monitor.

FIG. 2 is a block diagram showing an embodiment of a display device according to the present invention.

FIG. 3 is a flowchart showing a data processing procedure of this embodiment.

FIG. 4 is a schematic diagram showing a conventional EL / AZ display method.

[Explanation of symbols]

 1 EL screen 2 AZ screen 10 Glide path cursor 11 Aircraft data (EL) 13 Aircraft position monitor 20 Course line cursor 21 Aircraft data (AZ) 131 Glide path cursor for monitor 132 Monitor course line cursor 133 Aircraft position 201 Keyboard 202 Keyboard interface Circuit 203 Processor 204 External radar device 205 Input / output interface circuit 206 Memory 207 Display circuit 208 Display device

Claims (4)

[Claims] 1. A display method of a precision approach radar for displaying position data of an aircraft by an EL / AZ method, wherein a glide path cursor on the EL side and a course line cursor on the AZ side are respectively calculated based on given map data. Then, the positional deviation between the position data of the aircraft and the glide path cursor and the course line cursor is calculated on the EL side and the AZ side.
Respectively, the positional deviation data is converted into an orthogonal coordinate system in the EL and AZ directions, and the positional deviation data converted into the orthogonal coordinate system with the glide path cursor and the course line cursor as XY orthogonal axes. Is displayed on a part of the EL / AZ display screen. 2. The precise approach radar according to claim 1, wherein the displacement data converted into the orthogonal coordinate system is displayed on the monitor near the EL data on the EL side of the EL / AZ display. Display method. 3. The method of displaying a precise approach radar according to claim 2, wherein the monitor display moves in accordance with the aircraft data. 4. A precision radar display device for displaying position data of an aircraft by an EL / AZ system, wherein an EL side glide path cursor and an AZ side course line cursor calculated based on given map data are stored. Storage means for storing the position data of the aircraft and the positional deviation between the glide path cursor and the course line cursor on the EL side and the AZ.
Side displacement calculation means for each side calculation, conversion means for converting the displacement data into an orthogonal coordinate system in the EL and AZ directions and storing it in the storage means, and from the storage means to the orthogonal coordinate system. Display means for reading out the positional deviation data, and displaying the read positional deviation data on a part of the EL / AZ display screen with the glide path cursor and the course line cursor as orthogonal axes. Precision measuring radar display device.