JPH02239595A - Airport lighting device and individual power source for the device - Google Patents

Abstract

PURPOSE:To make the feeding voltage to individual power source devices in a low voltage and to reduce the scope of receiving the influence of a trouble and the like by providing individual power source devices dispersed to each group made by grouping one or plural lamps, and connecting the individual power source devices in parallel to a central power source. CONSTITUTION:Individual power source devices 2 are provided responding to lamps 1 at the ratio 1:1. Each power source device 2 is formed by including a current control circuit 3, a voltage/current detector 4 to detect the lamp current, and a lamp monitor control circuit 5. In this case, the lamp monitor control circuit 5 is preferably composed by using a microcomputer. The individual power source devices 2 are connected in parallel to the central power source 6 respectively through a wiring 7. By composing in such a way, the scope to receive the influence of a trouble and the like is remarkably reduced, and at the same time, the voltage of the lighting circuits can be made in a low voltage.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention... Concerning airport lighting equipment for runways, etc. [Prior Art] For example, a runway lighting facility as an airport lighting system is a visual aid facility for allowing aircraft to take off and land on a limited narrow area called a runway. That is, it is a visual signal indicating the runway to be approached by showing the light source itself to the aircraft pilot.

In general, runway lighting facilities include main lighting equipment installed along the runway, such as approach lights, approach angle indicator lights, touchdown zone lights, runway centerline lights, runway lights, wind direction indicator lights, and runway end lights. It also consists of auxiliary lighting equipment such as taxiway lights and taxiway center lights. There are approximately 5,000 lights on these A-class runways (3,000 m class), and the lights are illuminated at an appropriate brightness for the pilot's eyes, depending on background brightness conditions such as daytime, evening, and night, cloud height and low conditions, and visibility conditions. must be adjusted to provide a signal. Conventional runway lighting facilities include, for example, Japanese Patent Application Laid-Open No. 55-1152
As shown in Publication No. 93 or Japanese Unexamined Patent Publication No. 55-11.5294, lights (lamps) are divided into groups according to their usage, and each group is divided into several divisions.
One lamp circuit is formed for each group of 100 lamps, and one constant current control device is provided for each lamp group, thereby collectively controlling the luminous intensity of the lamps belonging to the group. Such a lighting circuit is arranged over a wide area, for example, by connecting 100 lamps to the secondary side of a small transformer called a rubber transformer, and connecting the primary side of this lamp transformer in series with a cable. It is composed of Here, there are various specifications of the lamp, for example, 200W. When using something of about 30V and 6.6A,
As a lamp transformer, the primary voltage is 30v. Current 6,6
A applies. The reason for using such a lamp transformer is that even if a lamp breaks, it prevents a power outage in the entire series-connected lighting circuit. Therefore, lamp transformers with saturation characteristics are used accordingly. In this way, since the lamp circuit is made up of lamp transformers connected in series, the voltage at the output end of the constant current control device is required to be 30V x 100 = 3000V in the above example.
Therefore, a step-up transformer is generally installed on the secondary side of the constant current control device to supply power to each lamp.
In this case, the primary voltage of the step-up transformer is 440V, taking into account fluctuations in the power supply voltage and line drops in the lighting circuit.
, Secondary voltage is 4400V, current 6.6A, capacity approximately 30K
Something of VA level is used. The luminous intensity of the lamp is controlled by controlling the current on the secondary side of the step-up transformer using the constant current control device described above, thereby controlling the luminous intensity of one lamp circuit at once. [Problems to be solved by the invention] According to the above-mentioned conventional technology, there are the following problems. ■ This is because approximately 100 lamps connected in series are collectively controlled by one constant current control device.
If the constant current control device malfunctions, all the lamps in the lighting circuit, which is its load, will go out, causing a problem in the operation of the aircraft. ■ As mentioned above, since the lighting circuit operates at high voltage, the cables and lamp transformers are required to have high dielectric strength, which increases costs, and also increases the risk of ground faults, poor insulation, arc discharge, etc. caused by high voltage. There is a problem. ■ It is difficult to locate the broken lamp. In addition, as a method for detecting the presence or absence of broken cores and the number of broken lamps in a group of lamps at once, Japanese Patent Application Laid-Open Nos. 1983-13979, 1983-148390, and 1982-18 are known.
One proposed by Publication No. 897 is known.
However, even with these technologies, there is a problem that it is not possible to identify the broken lamp itself.Conventional methods have the above problems, so when maintaining airport lighting equipment, it is necessary to identify the location where a ground fault has occurred, etc. Constant patrols were conducted to find broken lamps, and there was a problem in that a huge amount of manpower was required to maintain and repair such defective parts. The first object of the present invention is to provide an airport lighting system that can reduce the range affected by failures, etc. A second object of the present invention is to provide an airport lighting system that can reduce the voltage of the lighting circuit. A third object of the present invention is to provide an airport lighting system that can identify broken lamps. [Means for Solving the Problems] In order to achieve the first and second objects, the present invention divides a plurality of lamps arranged on an airport runway etc. into groups consisting of one or several lamps. , the individual power supplies for each group are provided in close proximity, the lamps belonging to each group are connected in parallel as loads of the corresponding individual power supplies, and each individual power supply is connected in parallel to the distribution line connected to the central power source. The reason for this is that the airport lighting system will become a major airport lighting system. In order to achieve the third objective, in addition to the above configuration, the individual power supply device detects the voltage and current of each lamp, and based on the detected values, detects the operating state of each lamp, including breakage. This lamp is equipped with lamp monitoring means. [Function] With the above configuration, the object of the present invention is achieved by the following function. First, individual power supplies are distributed for one or several lamps as a group. A failure of a separate power supply unit only affects that group. Since the individual power supply devices are connected in parallel to the central wig, the supply voltage of the individual power supply devices (voltage of the lighting circuit) is reduced. As a result of this lower voltage, the voltage of the distribution line cable and individual power supply device can be lowered, and various harmful effects caused by the high voltage #Il# can be eliminated. Furthermore, since the individual power supply unit is provided with a lamp operating state monitoring means that includes lamp breakage detection, it is possible to identify the location or existence of one or several broken lamps. This makes maintenance of the lighting equipment extremely easy. [Example] The present invention will be explained below based on an example. Figure 1 shows an overall configuration diagram of a practical example of the present invention. In this embodiment, as shown in the figure, individual power supply devices 2 are provided in one-to-one correspondence with the lamps 1, respectively. Each individual power supply unit w2 includes a current control circuit 3 and a voltage/current detection m for detecting lamp current.
4 and a lamp monitoring control circuit 5. It is preferable that the lamp monitoring control circuit 5 is constructed using a microcomputer. Each individual power supply! ! 2 are connected in parallel to a central power source 6 via power distribution lines 7, respectively. Further, the lamp monitoring control circuit 5 is connected to a central monitoring station 9 via a communication line 8. In addition, in this example, the lamp 1 and an individual power supply unit are used! 2 was shown for a one-to-one ratio, but
By connecting several lamps 1 to one individual power supply device 2, it is possible to reduce the number of individual power supply devices 2.

Further, in this case, it is possible to provide voltage and current detectors 4 for several lamps 1 individually or all at once, and to perform lamp monitoring, which will be described later, individually or all at once.

FIG. 2 shows a detailed configuration diagram of the individual power supply unit I2 of the embodiment shown in FIG. The power supplied from Chuo Electric WX6 is fuse 1
1 to the current control circuit 3. The current control circuit 3 is composed of a rectifier circuit 12 and a current regulator 13. 1! The current regulator l3 is a bridge type inverter current regulator having two sets of switching elements 14A and 14B. Note that numeral 15 is a smoothing capacitor. The output of current regulator 13 is connected to lamp 1. The lamp circuit 2 is provided with a current detector 4A and a voltage detector 4B, and current and voltage detection signals detected by these are inputted to a monitoring means 22 via an AD converter 21. Further, the lamp current {circle around (2)} converted by the AD converter 21 is input to the luminous intensity control means 23. The luminous intensity control means 23 compares the luminous intensity command (an amount equivalent to the current) Is given from the central monitoring station 9 via the communication means 24 with the detected current I^, and controls the luminous intensity via the phase control device 25 so as to make them coincide. The switching elements 14A and 14B are controlled by the switching elements 14A and 14B. The central monitoring station 9 is installed at an airport control tower or substation. The communication line 8 can be a multiple signal line using optical fiber or the like, and is configured to transmit information such as luminous intensity commands and operation commands from the central monitoring station 9 to each individual power supply system 2. ．． In addition, the operation status of the lamp detected by the monitoring means 22, for example, detection of core breakage,
Data such as light intensity detection, lamp life prediction, and internal short circuit detection are transmitted to the central monitoring station 9 via the communication means 24. The raw data on the operating state of the lamps and the data on the operating state regarding the individual power supply unit M2 are transferred to the central monitoring station 9 via the communication means 24, and the central monitoring station 9 checks the luminous intensity of each lamp based on the data. Breakage check, lifespan check, etc., and each individual power supply unit IT
It is also possible to perform function check 2. Either method makes it possible to centrally monitor the overall status of the lighting equipment. The operation of the embodiment configured in this way will be explained next. AC power given from the central power supply 6 is applied to the fuse 1
1 and then rectified by a rectifier circuit 12 and converted into direct current. The DC output is controlled by a current regulator 13, and the output voltage of the current regulator 13 is continuously variably controlled from zero to a predetermined maximum voltage. Note that the current regulator 13 may be a so-called PWM inverter or a switching regulator. A DC voltage controlled in this way is applied to the lamp 1. At this time, the current flowing through the lamp 1 and the applied voltage are detected by a current detector 4A and a voltage detector 4B, respectively, and further converted into digital signals by an AD converter 21. The luminous intensity control means 23 calculates the deviation between the luminous intensity command Is given from the communication means 24 and the current detection value inputted from the AD converter 21. The deviation should be reduced to zero.
Outputs the phase control signal. Upon receiving the phase control signal, the phase control device W125 transmits a control signal in a signal form (such as a pulse) corresponding to the current regulator 13 to the switching element 1.
Output to 4A and 14B. by this. The current flowing through the lamp 1 is controlled to a value according to the luminous intensity command Is, and the luminous intensity of the lamp 1 can be maintained at a predetermined value. Next, the monitoring means 22 will be specifically explained. The monitoring means 22 receives the voltage V^ and lamp current I^ actually applied to the lamp 1 from the AD converter 21. It has a function of sending these to the central monitoring station 9 via the communication means 24, and also detects or diagnoses the operating state of the lamp, which will be explained next, using a preset program.

■ Lamp breakage can be detected under the condition that the current voltage is close to zero even though the voltage V^ is being applied. ■ The lamp internal short circuit check can be detected under the condition that the voltage V^ is close to zero even though the current I^ is flowing as specified. ■ For light intensity check,
The relationship between the power given to the lamp and the luminous intensity is determined by the characteristics of the lamp used, as shown in Figure 3, so check the power determined by the product of the voltage V^ and the current I^. You can check whether the required luminous intensity is coming out. (2) The lifespan can be predicted based on the fact that there is a certain correlation between the resistance of the lamp filament and the lifespan, as shown in FIG.

That is, it is known that the resistance R of the filament of a lamp generally increases as it approaches the end of its life. Therefore, the resistance value R is obtained by dividing the voltage ■^ by the current ■^, and the life of the lamp can be predicted or predicted based on whether the resistance value reaches a certain value or more. Note that the necessary data including the data shown in FIG.
It is stored in the memory etc. As mentioned above, the first
According to the illustrated embodiment, an individual power supply device for controlling the luminous intensity of the lamp is provided for each lamp, and each individual power supply device is connected in parallel to the central power supply. The primary voltage of the individual power supply device, that is, the distribution voltage, can be lowered, significantly reducing the range affected by failure of the individual power supply device, and eliminating various adverse effects such as accidents caused by high voltage. Can be done. In addition, the monitoring means can check the luminous intensity of each lamp, check for core breakage, and predict the lamp's lifespan.
This greatly reduces maintenance work such as patrolling. In addition, according to the above embodiment, since each individual electrode is connected in parallel to the distribution line, it is only necessary to set the distribution voltage to the voltage required for one lamp, for example,
It is possible to set the voltage to about 200V. As a result, if the lamp output is 200W, the current will be about IA. FIG. 5 shows the structure of an embodiment of the individual power supply unit 12 according to the present invention in a partially broken section. This individual power supply device 2 is installed in a handhole as shown in Fig. 6, which is provided inside a runway or the like. The hand hole 30 is buried underground, and there are 4 holes inside.
A storage section 31 having a size of 00 mm x 900 mm is formed, and a lid 31 is provided almost flush with the ground. Therefore, a separate power supply! The external dimensions of No. 2 must be approximately 300 cubic meters, and must be completely waterproof, and must be temperature-resistant from -30°C to +55°C.
To protect the equipment from wide temperature changes, it must be molded with a material such as chloroprene rubber. That is, as shown in FIG. 5, a main body board 41 in which the main body of the individual power supply device 2 is incorporated is placed and fixed inside a case 43 made of die-cast aluminum via a fixture 42. The outer surface of the case 43 is covered with a jacket 46 made of chloroprene rubber or the like. And the lamp lead wire 47 and the power supply lead wire 48
The communication lead wire 49 is pulled out from the top.
Further, the case 43 is divided into a main body 43A and a lid 43B, and a labyrinth packing 44 is interposed at the joint between them. The outer wall of the case 43 is provided with ventilation holes 45 that communicate with each other.
It is communicated with. With this configuration, the main body board 41 is protected by the case 43 and the outer cover 46 from ingress of water and moisture. Also. When the lamp is lit, the heat output of the individual power supply unit is 15 to 20W for a 200W lamp.
The heat is cooled by the outside air flowing through the ventilation holes 45 formed in the case 43. Alternatively, a blower may be connected to one of the ventilation pipes 54A, 54B to forcibly send cooling air.
7, 48, and 49 are connected by connectors, but according to the present invention, since the voltage of the distribution line is low, the insulation structure of the connector is simple and there is no risk of arc discharge etc. occurring when connecting and disconnecting. Figure 7 shows another embodiment of the present invention. The difference between this embodiment and the embodiment shown in Fig. 1 is as follows. Center 1% 1[6 is DC electricity i1[5
The reason is that it is set to 1. Therefore, the rectifier circuit 12 of the individual power supply unit M2 is unnecessary. According to this embodiment, since there is no rectifier circuit 12, an individual power supply is required! 2 It has the advantage that the main body can be made smaller and generates less heat. Furthermore, since only direct current flows through the power distribution 117, the voltage drop is only due to the resistance, which has the advantage that the voltage drop is smaller than when using an alternating current power supply. FIG. 8 shows still another embodiment of the present invention. The difference between this embodiment and the embodiments shown in FIGS. 1 and 2 is that the luminous intensity of the lamp 1 is directly detected by the luminous intensity sensor 52, and the luminous intensity of the lamp 1 is taken into the monitoring means 22 via the AD converter 21. It looks like this. The ultimate requirement for lighting equipment such as runways is control of the luminous intensity of lamp 1.
Therefore, according to this embodiment, since the luminous intensity of the lamp itself can be detected and controlled, accurate luminous intensity control is possible. In the case of this embodiment, the luminous intensity itself is given as the luminous intensity command from the central monitoring station 9, the detected luminous intensity and the luminous intensity command are compared in the comparison 4II 54, the deviation is inputted to the luminous intensity control means 23, and based on this, the luminous intensity is The lamp current is used. Furthermore, instead of the light intensity sensor 52, it is also possible to provide the tip of an optical fiber facing the lamp 1, and to provide an optical/electrical signal converter at the input section of the AD converter 21. [Effects of the Invention] As explained above, according to the present invention, it is possible to significantly reduce the range affected by failures, etc. The voltage of the lighting circuit can be lowered. It is also possible to identify broken lamps. Moreover, it is easy to centrally monitor lamp brightness checks, life predictions, internal short circuit checks, etc. at a central monitoring station. As a result, compared to the past, there is almost no need for maintenance patrols, making it possible to reduce the enormous amount of manpower required to maintain and manage the lighting equipment on airport runways.

[Brief explanation of drawings]

Figure 1 is an overall configuration diagram of an embodiment of the present invention, and Figure 2 is a diagram of the first embodiment of the present invention.
Figure 3 is a diagram showing the relationship between lamp power and luminous intensity; Figure 4 is a diagram showing the relationship between lamp life and lamp resistance; Figure 5 is a diagram showing the relationship between lamp life and lamp resistance. The figure is a diagram showing an example of the structure of the individual power supply device according to the present invention, FIG. 6 is a structural diagram of a hand hole in which the individual power supply device of the fifth embodiment is installed, and FIGS. 7 and 8 are respectively according to the present invention. FIG. 2 is a configuration diagram of another embodiment of . DESCRIPTION OF SYMBOLS 1... Lamp, 2... Individual power supply device, 3... Current control circuit, 5... Lamp monitoring control circuit, 6... Central power supply, 7... Distribution line, 8... Communication Line, 9... Central monitoring station, 12... Rectifier circuit, 13... Current regulator, 4A... Current detector, 4B... Voltage detector,
21...AD converter, 22...monitoring means. 23...
・Light intensity control means, 24... Communication means, 25... Phase control means, 41... Main body board, 43... Case,
45...Vent hole, 46...Outer cover,

Claims (1)

[Claims] 1. A plurality of lamps arranged on airport runways, etc. are divided into groups of one or several lamps, and an individual power supply device is provided adjacent to each group, and each group An airport lighting system in which lamps belonging to the above are connected in parallel as loads of corresponding individual power supply units, and each individual power supply unit is connected in parallel to a distribution line connected to a central power supply. 2. The airport lighting system according to claim 1, wherein the central power source is an AC power source. 3. The airport lighting system according to claim 2, wherein the individual power supply device includes a rectifier circuit and a regulator that variably controls the output voltage of the rectifier circuit. 4. The airport lighting system according to claim 1, wherein the central power source is a DC power source. 5. Divide the multiple lamps installed on airport runways, etc. into groups of one or several lamps, install an individual power supply unit close to each group, and handle the lamps belonging to each group. The individual power supplies are connected in parallel as loads, and each individual power supply is connected in parallel to a distribution line connected to the central power supply, and the individual power supplies detect the voltage and current of each lamp, and the detected values are An airport lighting system comprising a lamp monitoring means for detecting the operating status of each lamp based on. 6. The lamp monitoring means includes a means for detecting a break in the lamp under voltage and zero current conditions, a means for detecting a short circuit inside the lamp under no voltage and current conditions, and a change in voltage and current characteristics. a means for predicting life based on;
Claim 5 characterized in that it comprises at least one means for detecting luminous intensity based on the power consumption of the lamp.
The airport lighting system described. 7. Claim 1, wherein the individual power supply device has a communication means for communicating with a central monitoring station, and a luminous intensity control means for controlling the current flowing through the lamp in accordance with a luminous intensity command given from the central monitoring station. or the airport lighting system described in 5. 8. The airport light according to claim 7, wherein the individual power supply device has a function of transmitting lamp operating state data detected by the lamp detection means to a central monitoring station via the communication means. Device. 9. An individual power supply device body comprising a current control means for controlling the current of the load lamp according to a given luminous intensity command, and a monitoring means for detecting the voltage and current of the lamp and monitoring the operating state of the lamp. An individual power supply device for an airport lighting system, which is housed in a sealed container made of a material having good heat conductivity, and the outer periphery of the container is covered with resin.