JPH04290971A - Lamp filament burnout sensing device for landing strip illumination - Google Patents

Abstract

PURPOSE:To sense the burnout position of a lamp filament certainly and shorten the down-time by furnishing a moving means on a device to measure the light intensity of each of the airport lamps arranged on a landing strip. CONSTITUTION:A filament burnout sensing device 6 moves over an airport lamp 1, and the light intensity of the lamp 1 is measured by an intensity measuring part 9 when a position sensing part 10 senses that the burnout sensing device has reached the position with the lamp. The set value for judging filament burnout is stored in a memory part 8, and the measured light intensity is compared with this set value. The memory part 8 stores whether burnout exists as the result from comparison.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applied to airport runway lighting equipment, and is a light core break detection device that detects a light whose core is expected to break and also detects which light has a core break. Regarding.

0002

2. Description of the Related Art Airport runway lights are important equipment that provide accurate visual information to pilots when aircraft take off, land, and guide aircraft to the runway.

Generally, this lamp circuit forms a series circuit as shown in FIG. 1 in order to keep the luminous intensity of each lamp uniform. The total circuit length can be as long as 5 to 10 Km, and high-voltage power distribution (3 to 5 KV) is common in order to reduce line loss. Furthermore, in order to avoid the situation where the entire circuit goes out due to the breakage of a single light, insulation transformers are installed at several dozen locations in the circuit, and one or several lights are connected to the secondary side of the insulation transformer.

[0004] In this lighting circuit, related methods for detecting the breakage of the lamp include, for example, Japanese Patent Publication No. 1983-
No. 15556 is mentioned.

[0005] This method detects the occurrence of a core break in a certain lamp in a circuit and the number of core breaks by observing changes in the output voltage waveform of a constant current control device. It cannot be specified.

[0006] For example, Japanese Patent Publication No. 2-226693 can be cited as a related device for detecting core breakage for the purpose of detecting the location where core breakage occurs.

[0007]

However, with such a lamp breakage detection device, it is not possible to determine which lamps are likely to be broken before the breakage actually occurs.

[0008] Furthermore, it is not desirable to connect the device directly to the lighting circuit due to the nature of airport equipment, which is in an extremely important position where people are kept.

Furthermore, burying equipment under adverse conditions such as vibration, noise, and submergence on a runway poses the problem of reduced reliability of the equipment, and when installing equipment at an existing airport, increased construction work and There is also the issue of a decline in airport runway functionality during the construction period.

An object of the present invention is to detect in advance airport runway lights that are expected to be broken, and
It is an object of the present invention to provide a lamp breakage detection device that detects which light is broken when a breakage occurs.

[0011]

The above object is achieved by periodically measuring the luminous intensity of each light on an airport runway at any time such as when a core break occurs.

Among airport lights, for example, halogen bulbs suffer from a decrease in luminous intensity due to deformation of tungsten. Therefore, it is possible to periodically measure the luminous intensity of each lamp, and when the difference from the reference luminous intensity exceeds a certain set value, it can be determined that the time for core breakage is approaching.

Furthermore, when the absolute value of the luminous intensity of a certain lamp is 0 or less than a set value when the lamp is turned on, it can be determined that the lamp is broken.

[0014] The present invention measures the luminous intensity of each lamp by moving the luminous intensity measurement unit that measures the luminous intensity of the lamp over the lamp positions stored in advance in the storage unit, and detects the lamp whose core is expected to be broken. Alternatively, it is characterized by detecting a broken light.

[0015] Here, the timing for starting the movement of the breakage detection device may be at a fixed period, or at the time of operation by a maintenance worker, etc., or by observing the output voltage waveform of the constant current control device, etc. It is also possible to provide a core breakage occurrence detection section according to the present invention, and detect the occurrence of core breakage at the time of detection.

[0016] Furthermore, the moving means may be one that moves on a lighting cable buried underground as a track.
It may be a device that moves on a new track newly installed on the ground or underground, or it may be a device that stores the distance and direction of the light from the starting point in advance and moves according to this memory.

The light intensity measuring section may have a movable measurement point depending on the shape of the lamp.

[0018] Furthermore, the light intensity measurement section may be a light detection section capable of detecting the presence or absence of light in order to detect a broken lamp.

[0019]

[Operation] The core breakage detection device starts moving at regular intervals or at an arbitrary time, and when it moves to the lamp position stored in the storage unit, the position detection unit detects that it has reached the lamp position.

[0020] Here, the light position may be detected by comparing the distance between the lights stored in the storage section with the actual moving distance, or may be performed by a device that recognizes the shape of the lights. Additionally, a new mark may be installed to recognize the presence of a light at this location.

When the core breakage detection device reaches the lamp position, the light intensity measurement section measures the light intensity of the lamp and compares it with a reference light intensity. If the difference between the reference luminous intensity and the measured luminous intensity exceeds a preset value, it is stored in the storage unit that the lamp is about to break. At the same time, if the light intensity measurement value is 0 or less than the preset setting value,
It is stored in the storage unit that the light is broken.

[0022] Here, the memory of a light whose core is about to break or whose core is broken may be a numerical value indicating the probability, or may be a numerical value itself such as a measured value or a difference from a reference luminous intensity. Good too.

[0023] When the memory of the light whose core is about to be broken or the light whose core has been broken is completed, movement to the next light position is resumed.

[0024] When this operation is repeated and all the lights stored in advance have been searched, the display means clearly indicates to maintenance personnel, etc., the lights that are about to break or the lights whose cores have been broken.

The display means may be built into the core breakage detection device, or may be displayed on a display device separate from the core breakage detection device.

The storage of the lamp position may be performed by a processing device separate from the core breakage detection device.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram showing the relationship between the airport runway lighting circuit and the light breakage detection device of this embodiment. In the runway lighting circuit, lights 1 installed at the center or side of the runway are connected to the secondary side of an isolation transformer 2, and all the primary sides of the isolation transformer 2 are connected in series with a cable 3, and constant current control is performed. It consists of a circuit to which a constant current is supplied by device 5. The light core breakage detection device 6 of this embodiment moves above the light 1 and stores the presence or absence of a core breakage or the lights that are expected to have a core breakage.

FIG. 2 is a control block diagram of the lamp breakage detection device 6, and the main components are a storage section 8, a light intensity measurement section 9, a position detection section 10, a servo motor 11, and a magnetic field sensor 1.
This is a control device 7 that controls the entire second class device.

The servo motor 11 is activated by the command of the control device 7.
operates to generate torque to the wheels for moving the lamp breakage detection device 6. At the same time, the magnetic field sensor 12 detects the magnetic field generated by the cable 3, thereby ensuring the path of movement.

[0031] An optically or magnetically detectable mark 4 is installed in advance near the light, and by detecting this mark 4, the position detection unit 10 notifies the control device 7 that the light position has been reached. do. In response to this, the control device 7 reads the luminous intensity of the lamp using the luminous intensity measuring section 9, and compares it with a set value stored in advance in the storage section 8. There are two types of set values: a set value for determining whether core breakage has actually occurred, and a reference luminous intensity for determining that the light intensity has decreased abnormally and the time for core breakage is near. There is one set value for determining the presence or absence of core breakage for each type of lamp, but there are as many reference luminous intensities as tap values for each type of lamp. Before the core breakage detection device 6 starts moving, the current tap value of the lamp is input, and a reference luminous intensity corresponding to the current tap value is used as a comparison target. By comparing each set value with the measured light intensity value,
If it is determined that the light is broken or that the time of breakage is near, this fact is stored in the storage unit 8 and the light is moved to the next light position to be detected.

The core breakage detection device 6 repeats the operation and ends its movement when all the light detection positions stored in advance in the storage section 8 have been scanned.

FIG. 3 provides means for storing the light position to be moved in the storage unit 8 of the light breakage detection device 6, and display means for completing the movement and informing maintenance personnel of the breakage position. 1 is a block diagram of a central processing unit 13. FIG.

The central processing unit 13 is composed of a CPU 14 that executes a series of processes, a main memory 15, an auxiliary memory 16, an I/F unit 21 with the core breakage detection device 6, and the like. A CRT 19 and a keyboard 20 are installed outside to set the light position to be moved to the core break detection device 6 and to display the core break position after the movement is completed. The CRT 19/keyboard 20 is connected to a driver/I/F unit 18 within the central processing unit 13. A CPU 14, a main memory 15, an auxiliary memory 16, an I/F unit 21, and a driver/I/F unit 18 in the central processing unit 13 are connected to a system bus 17 that controls data exchange.

When storing the light position of the core breakage detection device 6, a maintenance worker or the like uses the keyboard 20 while looking at the CRT 19.
Configure the settings. The information to be set includes the number of lights to be searched, the distance between lights, a luminous intensity setting value for determining the presence or absence of core breakage, a reference luminous intensity setting value for determining that the core breakage time is near, and the like. These are temporarily stored in the main memory 15, but when a maintenance person or the like confirms the set information on the CRT screen and performs a confirmation operation using the keyboard 20, the setting information is stored in the auxiliary memory 16. Furthermore, the central processing unit 1
3 and the breakage detection device 6 are connected with the cable 22, and the CR
T19 - By operating the keyboard 20, the setting information stored in the auxiliary memory 16 is transferred to the control device 7 via the I/F section 21.
transmitted to. Furthermore, by storing it in the storage unit 8,
Finish storing initial information.

When the core breakage detection device 6 has finished detecting the core breakage of each lamp, it is connected to the central processing unit 13 again via the cable 22, and the core breakage detection device 6 is connected to the central processing unit 13 via the cable 22, and the core breakage detection device 6 stores the core breakage information stored in the storage unit 8 by operating the CRT 19/keyboard 20. Information is transmitted to auxiliary storage 16. The breakage information stored in the auxiliary memory 16 is transferred to the keyboard 20.
By displaying the information on the CRT 19 through the operation, maintenance personnel and the like can easily know which lights have their cores broken and which lights are about to break.

Next, a second embodiment of the present invention will be explained.

The device configuration of the second embodiment is the same as that of the first embodiment, except that it includes a central processing unit 13 for storing the determination of core breakage.

When the core breakage detection device 6 reaches the moving light position, the light intensity measurement section 7 measures the light intensity of the light, stores it in the storage section 8, and moves to the next light.

After completing the measurement of the light intensity of all the lights, it is connected to the central processing unit 13 via the cable 22 and the measured light intensity of all the lights is transmitted to the auxiliary memory 16. Comparison of the luminous intensity of each lamp with a set value and determination of core breakage are executed by a software program in the auxiliary memory 16.

According to this embodiment, the processing of the control device 7 in the core breakage detection device 6 can be further simplified.

[0042]

[Effects of the Invention] According to the present invention, since the luminous intensity of each light is directly measured, it is possible to reliably detect the core breakage position, and furthermore, it is possible to detect lights that are close to core breakage before the core breakage actually occurs. As a result, the time required for the light to break is shortened.

[0043] Furthermore, even when applied to existing airports, there is no need for underground construction, and it can be applied to any airport by simply changing the setting information by maintenance personnel, which reduces costs economically. .

Furthermore, since the device is moved on the runway only when measuring the luminous intensity of the lights, the reliability of the device is improved compared to a method in which the device is buried under the extremely poor environmental conditions of the runway.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the relationship between a light breakage detection device and an airport runway light circuit in one embodiment of the present invention.

FIG. 2 is a control block diagram of the lamp breakage detection device.

FIG. 3 is a block diagram of a central processing unit.

[Explanation of symbols]

1...Light, 2...Isolation transformer, 3...Light cable, 4...
Mark for light position detection, 5... Constant current control device, 6... Light breakage detection device, 7... Control device, 8... Storage section, 9... Light intensity measurement section, 10... Position detection section, 11... Servo motor, 12...
Magnetic field sensor, 13...Central processing unit.

Claims (1)

[Claims] 1. A transformer for runway lights and a cable for passing current through the transformer are connected by a connector, and a plurality of the transformers are connected in series by the cable,
In a device for detecting a break in a light in a runway lighting circuit that supplies a constant current with a constant current control device, a storage unit that stores in advance a light position on an airport runway and further stores a detected break position; a moving means for searching for a light position stored in the storage section; a position detection section detecting that the moving means has reached the light position stored in the storage section; An airport runway light characterized by comprising: a light intensity measuring unit that measures the luminous intensity at the light position where the light is located; and a display means for clearly indicating the broken core position stored in the storage unit to maintenance personnel, etc. Breakage detection device.