JPH01196700A - Aircraft detecting device - Google Patents

Abstract

PURPOSE:To surely and continuously detect an aircraft to travel the center of a taxiway regardless of the size by providing a part of a loop coil along a central line near the central line of the taxiway. CONSTITUTION:In an aircraft detecting device to bury a loop coil 13 in a control section D provided at a taxiway 11 of an aircraft, detect an inductance change and detect the presence and absence of the aircraft in the control section D, a loop coil 13 is provided in a pipe 14 for wiring of a lamp provided in the taxiway 11 and at least one coil side of the loop coil 13 is provided along the central line near the central line of the taxiway. Thus, the aircraft to travel on the center of the taxiway 11 can be continuously detected regardless of the size, the loop coil 13 is provided in the pipe 14 buried already and thus, it is not necessary to dig up the taxiway and the device can be also applied to the existing airport.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an aircraft detection device in an aircraft ground guidance system for safely guiding aircraft on the ground.

<Prior Art> As an aircraft ground guidance system for safely guiding aircraft, a taxiway is divided into, for example, a plurality of consecutive control sections, an aircraft detection device is provided for each control section, and a signal light is provided for each control section. A system has been proposed in which the presence or absence of an aircraft is detected and the signal light is controlled to prevent subsequent aircraft from entering a controlled section where the aircraft is present (for example, Japanese Patent Application No. 177256/1984).

Conventional aircraft detection devices in such aircraft ground guidance systems embed a loop coil within the control section, and detect the aircraft by utilizing the change in inductance of the loop coil when the aircraft enters the loop coil. <Problems to be Solved by the Invention> However, in the past, large loop coils with lengths of, for example, 30 m and 40 m on the side parallel to the taxiway and the side that crosses the taxiway at right angles to this, have been used. It is buried with both sides parallel to the taxiway located outside the taxiway. For this reason, when detecting an aircraft traveling in the center of the taxiway using the centerline light as a landmark, as shown in Figure 5, a jumbo aircraft (approximately 70m long
Large aircraft such as a Cessna (approximately 10 m long and 7 m wide) can be detected continuously and stably as shown by the dotted line, but small aircraft such as a Cessna (approximately 10 m long and 7 m wide) cannot be detected completely within the loop coil. Finally, there is a problem that there is an undetectable area as shown by the dashed line, and continuous detection is not possible.

In order to solve this problem, for example, as shown in FIG.
m or less) and lay the loop coil 2, or install the 7th coil
As shown in the figure, a method can be considered in which the loop coil 2 is installed near the center of the guideway 1 with a shortened dimension in the direction across the guideway. Note that 3 indicates the center line light and A indicates the taxiway center line.

However, at existing airports, digging up a taxiway will hinder aircraft operations, so when installing loop coils, the installation location must be limited to a location that is suitable for the taxiway and cannot be chosen freely. Due to the above limitations, it is difficult to apply these methods to existing airports.Also, the former method has the problem of increasing the number of loop coils.

The present invention has been made in view of the above circumstances, and allows continuous detection of all aircraft regardless of their size.Moreover, the present invention enables continuous detection of all aircraft regardless of their size. The purpose is to provide an aircraft detection device that can be installed.

<Means for Solving the Problems> In the present invention, a loop coil is embedded in a control section provided on an aircraft taxiway, and changes in the inductance of the loop coil are detected to detect the presence or absence of an aircraft within the control section. In the aircraft detection device that detects The structure is such that it is installed near the center line and along the center line.

<Function> According to this configuration, since at least one side of the loop coil is provided along the taxiway near the center of the taxiway on which the aircraft travels, the aircraft traveling on the center of the taxiway is continuous regardless of its size. and can be detected.

Moreover, by installing loop coils in the pipes that are already buried for the wiring of center line lights, stop bar lights, etc. installed in the taxiway, there is no need to dig up the taxiway and it can be used at existing airports. can also be applied.

<Example> Embodiments of the present invention will be described below based on the drawings.

In FIG. 1 showing a first embodiment of the present invention, a centerline light 12 is fixed on the centerline of a taxiway 11 for an aircraft to notify the position of the taxiway 11 at night and to guide the aircraft safely. (for example, 15 m).

Further, the taxiway 11 is provided with a plurality of continuous control sections in order to guide aircraft safely and efficiently.

On one half of each control section, the length of the side parallel to the taxiway is approximately 30 m, and the length of the side perpendicular to this is approximately 20 m.
An aircraft detection loop coil 13 having a size of 1 is disposed so that at least one side thereof is placed near the centerline of the taxiway 11 along the centerline, and is continuously provided in the longitudinal direction of the taxiway 11.

Specifically, these loop coils 13 have one side parallel to the guideway 11 inside a pipe 14 buried along the shaft of the guideway 11 for wiring the centerline light 12, and the other side parallel to the guideway 11. are laid in the unpaved part outside the taxiway 11, and on both sides perpendicular to the taxiway 11, pipes 14 buried across the taxiway 11 are laid for the wiring of the centerline lights 12. ing. Each loop coil 13 is connected to an inductance change detection circuit (not shown) equipped with a bridge circuit including a loop coil as shown in, for example, Japanese Patent Application No. 177256/1982. In the event of a failure, this is a fail-safe configuration that takes the same output as the aircraft detection output state.

According to this configuration, since the aircraft traveling on the center line of the taxiway 11 is always on the loop coil 13 laid along the center of the taxiway 11, its detection output is the second one.
As shown in Figure (A), it is continuous regardless of the size of the aircraft. Note that a and b in FIG. 2 indicate detection outputs of adjacent loop coils. In addition, the inside of the wiring pipe 14 of the center line light 12 already buried in the taxiway 11 and the inside of the taxiway 11
Since the loop coil 13 is laid outside on the unpaved part, there is no need to dig up the taxiway 11, and the installation work can be done even at existing airports where there are restrictions on installation work. Furthermore, the number of loop coils 13 can be kept the same as in the conventional case. Also,
A car traveling on the edge of the taxiway 11 that has left the center line light 12 completely enters the loop coil 13, so the loop coil 1
Since the detection output of No. 3 is discontinuous as shown in FIG. 2(B), it can be distinguished from an aircraft.

Next, FIG. 3 shows a second embodiment.

This device has a configuration in which a loop coil 13 of the same shape is similarly installed on the side where the loop coil of the first embodiment is not installed. Incidentally, the same parts as in the first embodiment are given the same reference numerals and the explanation thereof will be omitted.

According to such a configuration, although the number of loop coils increases,
The detection circuit can be made into a dual system so that aircraft can be detected independently on each side. Therefore, even if a failure occurs in one loop coil group, the aircraft can be detected by the other loop coil group, so in addition to the same effect as the first embodiment, the reliability of the system can be greatly improved. .

FIG. 4 shows a third embodiment.

In this embodiment, the loop coil 13 is arranged to intersect at the center of the guide path 11 in a substantially figure-eight shape.

In this case, the inductance change is added to the loop coil 13 portion of the guideway 11, and the change becomes large, increasing the detection sensitivity. Further, since the external noises of the same phase act in a direction of canceling each other out, there is an effect that noise resistance is improved.

<Effects of the Invention> As described above, according to the present invention, since a part of the loop coil is laid along the center line near the center line of the guideway,
Aircraft traveling in the center of the taxiway can be reliably and continuously detected regardless of their size. In addition, as the loop coils are installed in unpaved areas outside the taxiway while using pipes already buried inside the taxiway, there is no need to dig up the taxiway (at existing airports where there are restrictions on installation work). However, installation work is possible.

[Brief explanation of the drawing]

Fig. 1 is a main part configuration diagram showing a first embodiment of the present invention, Fig. 2 is a detection output state diagram of an aircraft and a car in the same embodiment, and Fig. 3
The figure is a block diagram of main parts showing the second embodiment of the present invention, Fig. 4 is a block diagram of main parts showing the third embodiment of the invention, and Fig. 5 is the detection output of small and large machines using the conventional device. State diagram, Figures 6 and 7
The figure shows an example of installing loop coils that cannot be applied to existing airports. 11... Taxiway 12... Center line light 13...
・Loop coil 14... Piping D... Control section Patent applicant Director of Ship Technology Research Institute, Ministry of Transport Nippon Signal Co., Ltd.

Claims (1)

[Claims] An aircraft detection device in which a loop coil is embedded in a control section provided on an aircraft taxiway, and detects a change in inductance of the loop coil to detect the presence or absence of an aircraft within the control section, wherein a light installed in the taxiway is provided. The aircraft is characterized in that the loop coil is installed in the wiring piping of the aircraft, and at least one coil side of the loop coil is installed near the center line of the guideway along the center line. Detection device.