JPH0696399A - Control information system and altitude monitoring method - Google Patents

Abstract

PURPOSE:To monitor even the altitude for an aircraft which approaches from a wide-angle range by providing the altitude monitor device with a virtual approach course calculating means. CONSTITUTION:Raday machine information which is inputted from a radar sensor is converted by a target detecting device from analog information to digital information. This information is passed to a tracking processor 3, which calculates the speed and course of the aircraft. At this time, if the aircraft is not existed on the prolongation of a runway, but in a sectorial range centering on the runway end, the processing is transferred to the altitude monitor device 14. The virtual approach course calculating means 20 inputs data obtained on the basis of the radar machine information inputted by the radar sensor and the processing result of the tracking processor 3, draws an arc shown by a thick line 100 unless the aircraft flies straight to assume that the aircraft will approaches the runway, and calculates the distance (length of arc) of the course, and an approach angle calculating means 30 calculates the approach angle. When the aircraft flies straight, the approach angle calculating means 30 calculates the approach angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control information system for supporting air traffic control work, and more particularly to an altitude monitoring device for monitoring the altitude of an aircraft.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing the configuration of a conventional control information system, FIG. 7 is a block diagram showing the internal configuration of a conventional altitude monitoring device, and FIG. 8 is a flowchart showing the operation of the altitude monitoring device. In FIG. 6, 1 is a radar sensor that captures information about the aircraft (type of aircraft, altitude, polar coordinates centering on the runway), and 2 is a radar sensor.
A target detecting device for converting analog radar machine information input from the radar sensor into digital information, 3 is a tracking processing device for calculating the speed and course of an aircraft, 4 is a central processing unit, storage device (not shown) The altitude monitoring device 5 for monitoring the altitude of an aircraft equipped with a file device displays an alarm when the altitude monitoring device 4 processes the altitude information and determines that the aircraft is in an abnormal altitude. It is a display device. In FIG. 7, reference numeral 30 is an approach angle calculation means for calculating the approach angle of the aircraft by taking in the radar machine information from the radar sensor 1 and the processing data of the tracking device 3, and 40 is the view of the altitude monitoring device 4. An obstacle calculation means for detecting whether there is an obstacle in the course of the aircraft based on the map information already stored in the data file that does not exist,
Reference numeral 50 is a warning display means for displaying a warning on the display device when it is determined that the aircraft has not entered the runway properly.

Next, the operation will be described. In FIG. 6, the radar machine information (aircraft type, altitude, coordinates) input from the radar sensor 1 is converted from analog information to digital information in the target detection device 2. The converted digital information is sent to the tracking processing device 3 to calculate the speed and course of the aircraft. Conventional ILS (In
At the airport where equipments Landing System is installed, the approach course to the runway is
Since it is limited to one parallel to the runway, when the aircraft enters the runway, it will go straight ahead from the runway direction. Therefore, the processing range of the altitude monitoring device is the range shown in FIG. As a result of processing by the tracking device 3 based on the coordinates and altitude information of the aircraft obtained from the radar sensor 1, the position of the aircraft is within the processing range of FIG. 9, and the aircraft enters the runway from the course information of the aircraft. If so, the process proceeds to the altitude monitoring device 4. The operation of the altitude monitoring device 4 will be described below with reference to the flowchart of FIG.

The approach angle calculation means 30 is a radar sensor 1.
The radar information and the data obtained as a result of processing by the tracking processing device 3 are captured (S1), and the approach angle is calculated (S2). The approach angle is calculated by the following calculation. In FIG. 9, when the position of the aircraft is A, the altitude is H, and the runway edge is B, the approach angle α can be obtained by tan α = H / AB. Next, it is judged whether or not the obtained approach angle is normal (within a certain range) (S3), and if it is normal, the ground data such as map information is taken out from the data file (S3).
4) It is determined whether or not there is an obstacle in the course of the aircraft (S5). When an abnormal approach angle or an obstacle is detected, the warning display means 50 displays a warning on the display device 5 (S6). The display device 5 displays a warning on the radar screen by blinking or by changing the display color (for example, from green to red).

[0005]

Since the processing range in the conventional altitude monitoring apparatus is ILS, the processing range shown in FIG.
As shown in, only the runway direction, and MLS (Mic
When a low landing system (microwave landing system) is installed at an airport, it is generally possible for an aircraft to enter from a wide angle range shown in Fig. 5, but to enter from a line other than the extension line of the runway. There was a problem that altitude monitoring could not be carried out for incoming aircraft.

The present invention has been made to solve the above problems, and an object thereof is to enable altitude monitoring even for an aircraft approaching from a wide angle range.

[0007]

The altitude monitoring device according to the present invention, for an aircraft which is determined to enter the runway from a line other than the extension line of the runway, the aircraft sets the runway end at the tip of the arc. By providing a virtual approach route calculation means that calculates the course assuming that it will enter the runway by drawing an arc
Every time a course is calculated and radar machine information (aircraft altitude, coordinates) is input from the radar sensor, altitude monitoring is performed by comparing the altitude of the aircraft with the predicted approach course calculated from the position of the aircraft and the altitude. It is a thing.

[0008]

The altitude monitoring apparatus according to the present invention enables altitude monitoring of an approaching aircraft from a wide angle range in order to grasp the position of the aircraft and a predicted approach course even for an aircraft approaching from a wide angle range. To enable.

[0009]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a control information system showing an embodiment of the present invention, FIG. 2 is a block diagram showing an internal configuration of an altitude monitoring device which constitutes the control information system, and FIG. 3 is an altitude monitoring device. Is a flowchart for explaining the operation of the above, and in the figure, the same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. In the figure, 14 is
An altitude monitoring device including a central processing unit, a storage device, and a file device (not shown) calculates the predicted approach route for an aircraft determined to be approaching the runway by the tracking processing device 3. It has a virtual approach route calculating means 20 for performing and monitors the altitude of the aircraft.

Next, the operation will be described. Radar machine information such as aircraft type, altitude, and coordinates input from the radar sensor 1 of FIG. 1 is converted from analog information to digital information in the target detection device 2. This information is passed to the tracking processing device 3, where the speed and course of the aircraft are calculated. At this time, if the aircraft is on an extension of the runway and it is determined that the aircraft will make a straight line approach to the runway from the course and altitude, the processing is transferred to 14 altitude monitoring devices and conventional altitude monitoring is performed. To do. Further, the aircraft does not exist on the extension line of the runway, but exists within a fan-shaped range centered on the runway end as shown in FIG. 5, and is turning, and in addition to the course calculated by the tracking processing device. Then, from the aircraft positions for the past several scans input from the radar sensor, if it is determined that the course will continue in the direction parallel to the runway at the runway tip if it continues to turn as it is, it is processed by 14 altitude monitoring devices. Transfer.

The operation will be described below with reference to the flowchart of FIG. The virtual approach route calculation means 20 is a radar sensor 1
The radar information acquired by and the data obtained as a result of processing by the tracking processing device 3 are acquired (S1), and it is determined whether the flight is straight flight (S10). Assuming that an arc indicated by a thick line 100 is drawn to enter the runway, the position A of the aircraft and the position B of the runway end shown in FIG. 4, and the course of the aircraft at the end of the runway become the runway. It is predicted that the aircraft will enter the arc represented by the center of the arc: 0 = (r / 2cosθ, 0) radius of the arc: R = r / 2cosθ, depending on the condition of being parallel. Where r is the distance between the runway edge and the aircraft, R is the radius of the expected approach road, and θ is the intersection angle between the line segment perpendicular to the runway direction and the line segment connecting the runway edge and the aircraft position. . The center 0 is a position on the coordinates with the X axis in the direction perpendicular to the runway and the runway end as the origin. After that, the distance of the course (the length of the arc) is calculated as follows. In FIG. 4, since the radius of the arc is R = r / 2cosθ, the arc AB = 2πR x (π-2θ) / 2π = r (π−2θ) / 2cosθ After that, the process is moved to the approach angle calculation means. The approach angle is calculated from the distance of the course (the length of the arc) and the current altitude of the aircraft in the same manner as described in the conventional example (S2), and it is determined whether the approach angle is within a certain range. (S3) After that, the same operation as the conventional example is performed. If it is a straight flight, the approach angle calculation means 30 calculates the approach angle, and then the same operation as in the conventional example is performed.

Example 2. In the above embodiment, it is assumed that the aircraft enters in an arc, but in addition to this, a function of assuming that the aircraft enters in a quadratic curve or an elliptic arc is added to enter an aircraft existing in a wide angle range. The route will be better understood. In addition, the approach prediction function assuming that a quadratic curve or an elliptic arc is drawn is used as an appropriate parameter (2
If the curve is the next curve, the coordinates of the focal point, the variable for calculating the equation of the quasi-line, if the ellipse, the coordinates of the focal point, the variable for calculating the ratio of the length of the long axis to the length of the short axis) The road will be predicted.

[0013]

As described above, according to the present invention, an aircraft equipped with an MLS (microwave landing gear) can be used to grasp the approach route of an aircraft approaching from a wide angle range and perform altitude monitoring. In the case of an aircraft approaching from a fan-shaped range centered on the runway end shown in FIG.
The altitude can be monitored.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control information system of the present invention.

FIG. 2 is a block diagram showing an internal configuration of an altitude monitoring device of the present invention.

FIG. 3 is a flowchart showing the operation of the altitude monitoring device of the present invention.

FIG. 4 is a conceptual diagram of an approach route calculation of the aircraft of the present invention.

FIG. 5 is a diagram showing a processing range when MLS is used.

FIG. 6 is a diagram showing a configuration of a conventional control information system.

FIG. 7 is a block diagram showing an internal configuration of a conventional altitude monitoring device.

FIG. 8 is a flowchart showing the operation of a conventional altitude monitoring device.

FIG. 9 is a diagram showing a processing range of a conventional invention.

[Explanation of symbols]

A Aircraft input position from radar B Runway tip position O Center of expected approach path of aircraft R Radius of expected approach path of aircraft r Distance from runway tip to aircraft position θ Line segment and runway perpendicular to runway direction Angle of intersection between the edge and the line segment connecting the aircraft position 1 Radar sensor 2 Target detection device 3 Tracking processing device 5 Display device 14 Advanced monitoring device 20 Virtual approach path calculation means 30 Approach angle calculation means 40 Obstacle calculation means 50 Warning display means

Claims (2)

[Claims] 1. A radar sensor for tracking an aircraft, a target detection device for converting analog information from the radar sensor into digital information, and a tracking processing device for calculating the speed and course of the aircraft based on the digital information. And control information composed of an altitude monitoring device that monitors the altitude of the aircraft based on the information processed by the tracking processing device, and a display device that displays an alarm if there is an abnormality as a result of the processing of this altitude monitoring device. In the system, the altitude monitoring device includes a virtual approach calculation means for predicting an approach path of the aircraft, a means for detecting an obstacle in the approach direction of the aircraft, and a means for displaying an abnormality. Control information system. 2. The approach route of the aircraft is calculated as an arc from the position information of the aircraft and the position information of the runway, the approach angle of the aircraft is calculated from this arc portion, and the approach angle of the aircraft is calculated based on this approach angle. An altitude monitoring method characterized by performing altitude monitoring.