JP2734281B2 - Landing guidance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landing guidance system, and more particularly to a PAR landing guidance system with improved control accuracy and efficiency.

[0002]

2. Description of the Related Art An aircraft in a final approach state toward an airport runway is deviated from an approach course including a predetermined glide path (descent path) and a course line (direction), and a distance from a landing point. PAR landing guidance devices (hereinafter simply referred to as PARs) that provide data to be guided to an approaching aircraft while measuring the PAR are well known. Conventionally, as a method of monitoring the overall operation of the PAR, a reflector is installed near the landing point, and it is checked whether the position of the reflected signal from the reflector displayed on the scope matches the position of the reflector obtained by surveying in advance. A method has been adopted in which a visual check is made by a controller.

FIG. 4 shows a plan view (a) and a side view (b) of an installation example of a touch-down reflector installed at the same distance as a landing point. FIG. 5 shows a display example on the scope.
As shown in FIG. 5, in the conventional display method, the reflector is displayed in the same display area as the elevation display screen 21 and the azimuth display screen 22 used for control, and the height and azimuth position of the reflector obtained by surveying are determined by the cursor 23. To see if they match.

[0004]

In this conventional method,
When the reflector is installed at a short distance from the PAR, there is a problem that the accuracy required for confirmation cannot be obtained due to the limitation of the display accuracy of the scope. In addition, there is a problem that it takes a long time for confirmation because the display is separated from the height, the direction and the direction.
SUMMARY OF THE INVENTION An object of the present invention is to provide a landing guidance device capable of accurately confirming even when a reflector is installed at a short distance and shortening the confirmation time.

[0005]

According to the present invention, a tracking processing section of a PAR includes a circuit for separating reflector data from various target data received, and a circuit for detecting a difference between the reflector data and survey data of the reflector. And
The indicator is provided with a display area dedicated to the reflector so that the height and the azimuth difference are displayed in the same area.

[0006]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. The high-frequency power output from the transmission unit 1 passes through the circulator 2 from the antenna unit 3 of the electronic scanning system to the beam control unit 4.
In the direction controlled by the phase shift data from As shown in FIG. 2, the reception signal reflected by the aircraft or the reflector is input to the reception unit 5 via the antenna unit 3 and the circulator 2 in FIG.
The detection is further performed to remove unnecessary signals, and the like, and output to the target detection unit 6. The target detecting unit 6 detects the elevation azimuth and distance of the aircraft and the reflector, and outputs the position data to the tracking processing unit 7.

The tracking processing unit 7 includes a tracking processing circuit 71 for obtaining target data, a gate circuit 72 for extracting only reflector data by designating an area, and a difference detection unit for outputting a difference between optical measurement data of the reflector and the reflector data. It has a circuit 73 and a synthesizing circuit 74 for synthesizing this data with target data, and outputs target data including reflector data obtained by the synthesis to the instruction unit 8.

FIG. 3 shows an example of a scope display on the instruction unit 8. A display area 13 dedicated to the reflector is provided outside the area of the height display 11 and the direction display 12. The cross point in the reflector display area indicates the position of the reflector by surveying, the vertical direction indicates the height difference, and the horizontal direction indicates the azimuth difference.

[0009]

As described above, according to the present invention, the reflector data is categorized and taken out from the target, and the azimuth difference and the height difference between the reflector data and the reflector survey data are detected. Since the information is displayed in the display area, the error can be accurately confirmed even when the reflector is installed at a short distance. Also, since the altitude and the direction are displayed in the same area, it is possible to confirm the information in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a landing guidance device according to the present invention.

FIG. 2 is a diagram illustrating radio waves emitted from a PAR toward a target and a reflector.

FIG. 3 is a diagram showing a scope display in the present invention.

FIG. 4 is a diagram illustrating an example of installation of a reflector.

FIG. 5 is a diagram showing a conventional scope display.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmitting part 3 Antenna part 5 Receiving part 6 Target detecting part 7 Tracking processing part 8 Instruction part 72 Gate circuit 73 Difference detecting circuit

Claims (1)

(57) [Claims] In a landing guidance system provided with a reflector for monitoring the overall operation of a PAR (precision approach radar), a tracking processing unit includes a circuit for separating reflector data from various received target data, A circuit for detecting a difference between the reflector data and the surveying data of the reflector is provided, and a display area dedicated to the reflector is provided in the indicating section so that the height and the azimuth difference are displayed in the same area. Landing guidance device.