JPH10234142A - Light-monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-monitoring system which can easily and exactly monitor core failures of lights or the surrounding data of the lights, such as airport lights which are scattered at numerous parts and over a wide range in an airport or the like. SOLUTION: Airport light terminal devices M1 to Mn are fitted respectively, which detect the condition of the lights and the surrounding data of the light, so as to meet a plurality of the lights of an airport connected through a power line PL. By transmitting the light condition and the surrounding data of the lights detected by the airport light terminal devices M1 to Mn with a power line communication by means of a token passing system using the power line PL, the conditions of a plurality of lights and the surrounding data of the lights are monitored with an airport light control device MO. A high-frequency bypass transformer which compensates for the loss of power line communication is provided for the respective airport light terminal devices M1 to Mn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp monitoring system for monitoring the status of a plurality of lamps connected to a power line, and more particularly to disconnection of lamps such as airport lights scattered in a large number of airports. Alternatively, the present invention relates to a lamp monitoring system capable of accurately monitoring information around the lamp with a simple configuration.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a conventional airport light control system at an airport. The control system shown in FIG. 10 is called a simple series type, in which the primary sides of a plurality of transformers Tr1 to Trn are connected in series to a constant current regulating power supply 10 via a power line PL, and each of the transformers Tr1 to Trn is connected. (Airport lights) 1-1 to 1-n are connected to the secondary side of the vehicle.

[0003] The constant current regulating power supply 10 includes a transformer Tr.
1 to Trn to supply current to the primary side.
The currents flowing to the primary sides of 1 to Trn have the same value at the same time, and the illuminances of the lamps 1-1 to 1-n are the same at the same time.

[0004] When disconnection occurs in any of the lamps 1-1 to 1-n, the secondary circuits of the transformers Tr1 to Trn corresponding to the lamp in which the disconnection has occurred are opened. In this case, the transformer is magnetically saturated, and the impedance on the primary side is not so large.

The constant current supplied from the constant current regulating power supply 10 is about 7.5 A at maximum during the day and about 3.5 A at minimum during the night.

By the way, assuming that the voltage effect of one of the transformers Tr1 to Trn is 30 V, when the constant current supplied from the constant current regulating power supply 10 is 7.5 A, the power consumed by one transformer is 7 .5 (A) x 30 (V) = 2
23 (W) and its impedance is 223
(W) ÷ (7.5 (A) × 7.5 (A)) = 4 (Ω)

At 3.5 A, the power consumed by one transformer is 3.5 (A) × 3.5 (A) × 4 = 5
0 (W).

The maximum voltage of the constant current regulating power supply 10 is 30 (V) × 4000 (m) ÷ 30 (m) = 40, where the length of the power line PL is 4 km and the lamp interval is 30 m.
00 (v).

[0009]

In the airport light control circuit having such a configuration, each of the lamps 1-1 is provided.
The problem is how to detect the decentering of .about.1-n.

Conventionally, in order to detect the disconnection of each lamp in this type of airport light control circuit, 1) detect the disconnection of each lamp by monitoring with a monitoring camera 2) visually inspect each lamp by patrol by a car For example, a method of detecting the decentering of an object is used.

However, in this type of airport light control circuit, since each of the lamps 1-1 to 1-n is scattered over a wide range, no matter which method is adopted, each of the lamps has its own core. It takes considerable effort and time to detect, and moreover, it cannot always be accurately detected.

Further, there is a lamp of this type in which a vibration sensor or the like for detecting an approach of an aircraft or a vehicle, for example, is arranged. How to collect the detection output of this sensor also becomes a problem.

A power line PL for supplying power to each of the lamps 1-1 to 1-n is housed in a pipe and laid.
A method has also been proposed in which a communication line is passed through a pipe containing the power line PL, and detection output of a vibration sensor or the like provided corresponding to each of the lamps 1-1 to 1-n is collected using this communication. In the case of this configuration, it is necessary to remove this power line from the pipe in which the power line is already stored, and to store a new power line including a communication line, which requires extensive construction,
The costs are enormous.

Therefore, by using power line communication using the power line PL for supplying power corresponding to each of the lamps 1-1 to 1-n as a communication path, the disconnection information and vibration of each of the lamps 1-1 to 1-n are utilized. A method of collecting a detection output of a sensor or the like has also been proposed.

However, in this type of lamp monitoring system employed in airports and the like, the lamps 1-1 to 1-n
Becomes enormous, and the distance becomes considerably long, so that signal attenuation on the power line as a communication path becomes a problem.

That is, in the above lamp monitoring system, as shown in FIG.
And the power line PL covered with the insulator 103
Need to be accommodated and laid in a pipe 101 made of a metal pipe, an insulator 103 and an air layer 102 are interposed between the power line PL and the pipe 101, whereby the simple structure shown in FIG. Considering a series-type lamp monitoring system, a distributed capacitance represented by a capacitor C as shown in FIG. 12 is generated.

The power line PL has an inductance which is very small, but also generates a magnetic flux leakage due to the transformer Tr.

For this reason, the communication system of this lamp monitoring system can be represented by an equalizing circuit including resistors R1 and R2, an inductance L and a capacitor C as shown in FIG.

As is apparent from the equalization circuit shown in FIG. 13, when power line communication is employed in this lamp monitoring system, attenuation of high frequency components becomes a problem.

That is, in the power line communication of this lamp monitoring system, a signal having a spectrum spread of 100 KHz to 400 KHz is used. For example, an airport light terminal device which is an initial parent terminal of the token passing power line communication is used. Considering the case where a signal having an output of 10 mW is transmitted at every 10 KHz as shown in FIG. 14 for the power line communication, the received signal at the airport light terminal device apart from the airport light terminal device is shown in FIG. As shown, the signal on the high frequency side, that is, the signal on the 400 KHz side is greatly attenuated, and there is a possibility that a signal error occurs due to the attenuation of the signal on the high frequency side.

Therefore, the present invention provides a lamp which can easily and surely monitor the disconnection of a lamp such as an airport lamp or the like at an airport or the like and information around the lamp. The purpose of the present invention is to provide an instrument monitoring system.

[0022]

To achieve the above object, according to the first aspect of the present invention, there is provided a lamp monitoring system for monitoring a state of a plurality of lamps connected via a power line. A power line communication means for transmitting the state of the lamp detected by the state detection means by power line communication using the power line, and a power line communication loss at a location where the lamp is provided. Communication loss compensating means for compensating for the loss.

According to a second aspect of the present invention, in the first aspect of the present invention, the state detecting means detects a disconnection of the lamp.

According to a third aspect of the present invention, in the first aspect of the present invention, there is further provided proximity detecting means for detecting a state near the lamp, and a vicinity of the lamp detected by the proximity detecting means. The state is transmitted by the power line communication means using the power line together with the state of the lamp detected by the state detection means.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the lamp is an airport light arranged at an airport, and the proximity detecting means is configured to move an aircraft or the like approaching the airport light. It is characterized by detecting the presence or absence of a body.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the lamp is connected through a first transformer connected in series to the power line, and the power line communication means is connected to the power line. A power line modem connected via a second transformer connected in parallel to the power line at a connection point of the first transformer, wherein the communication loss compensating means includes a high-frequency device connected in parallel to the first transformer; It is characterized by comprising a bypass transformer.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the driving power of the power line modem is supplied via a secondary circuit of the first transformer.

According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the power supply for the power line modem is supplied via the first transformer and the second transformer. .

According to an eighth aspect of the present invention, in the fifth aspect of the present invention, the high-frequency bypass transformer includes a first coil connected in parallel to the power line via a first capacitor; High frequency connected to the coil
And a second coil connected to the power line modem via the capacitor described above.

According to a ninth aspect of the present invention, in the eighth aspect of the present invention, the circuit including the first and second capacitors and the high-frequency bypass transformer is mounted on the first transformer. It is characterized by the following.

According to a tenth aspect of the present invention, in the ninth aspect, the first transformer comprises a rubber transformer sealed with rubber.

According to an eleventh aspect of the present invention, in the eighth aspect of the present invention, the circuit including the first and second capacitors and the high-frequency bypass transformer is mounted by being rubber-molded integrally with the first transformer. It is characterized by being performed.

According to a twelfth aspect of the present invention, in the first aspect, the power line communication by the power line communication means is
It is performed between the power line modems by a token passing method.

According to a thirteenth aspect of the present invention, in the lamp monitoring system for monitoring the state of a plurality of lamps connected via a power line and instructing the lighting and turning off of the lamps, State detecting means for detecting the state of the lamp, turning on / off command means for instructing lighting and extinguishing of the lamp, and the state of the lamp detected by the state detecting means and the lighting of the lamp instructed by the lighting / lighting instructing means. Power line communication means for transmitting a command to turn off and power line communication using the power line,
Communication loss compensating means for compensating for the loss of the power line communication at a place where the lamp is provided.

[0035]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram showing an embodiment of a lamp monitoring system according to the present invention.

In FIG. 1, this lamp monitoring system comprises:
The state of a large number of airport lights (lights) distributed at various points in an airport using power line communication using a power line, that is, the state of the airport light being broken and the information around the airport light, for example, this airport light It collects and manages information such as the approach of aircraft and vehicles to the aircraft.

Further, in this embodiment, a command to turn on and off the airport light is also issued.

That is, in FIG. 1, the airport light management device M0 and the airport light terminal devices M1 to Mn include the status of the airport lights arranged corresponding to the respective airport light management devices M0 and the airport light terminal devices M1 to Mn. A communication terminal that detects a large number of pieces of airport light information around each airport light and transmits the information using power line communication is configured. The airport light management device M0 and the airport light terminal devices M1 to Mn each Are connected in series via a power line PL to a constant current regulating power supply 10 that supplies a drive current to the power supply 10.

Here, the lamp monitoring system shown in FIG. 1 corresponds to the simple series type system described with reference to FIG.

As will be described in detail later, the simple serial type lamp monitoring system shown in FIG. 1 is detected by the airport light management device M0 and the airport light terminal devices M1 to Mn using token passing power line communication. It is configured to collect and manage the status of each of the airport lights and information about the airport lights, and the airport light management device M0 is first set as the initial parent terminal of the token-passing power line communication. To manage the entire system.

Further, the lamp monitoring system also manages the turning on and off of the airport light by using a token passing power line communication in accordance with a command from the airport light management device M0.

FIG. 2 shows an airport light management device M which is an initial parent terminal of the token passing power line communication shown in FIG.
0 shows a detailed configuration.

In FIG. 2, the airport light management device M0
Includes an airport light 21 connected to the power line PL via a transformer Tr, a disconnection detection sensor 22 for detecting disconnection of the airport light 21, a coil 23a on the primary side, and a coil 23b on the secondary side. Transformer 23 having this transformer 23
Is connected to the power line PL via the input terminal, and receives the output of the center-loss detection sensor 22 to input the other airport light terminal device M.
A power line modem 24 for performing power line communication with 1 to Mn;
The airport light terminal devices M1 to M1 are connected to the power line modem 24, control the token line power line communication, and collect the token passing power line communication.
It includes a control unit 25 that collects and manages the state of the airport light corresponding to Mn and information on the vicinity of the airport light, and also issues a command to turn on and off the airport light terminal devices M1 to Mn.

FIG. 3 shows the detailed structure of the airport light terminal devices M1 to Mn of the light monitoring system shown in FIG.

In FIG. 3, the airport light terminal device M is
Airport light 31 connected to power line PL via transformer Tr, disconnection detection sensor 32 for detecting disconnection of airport light 31, transformer having coil 33 a on the primary side and coil 33 b on the secondary side 33, power is supplied from a power line PL via a coil 33a and a coil 33b of the transformer 33, and a power line modem 34 for performing token line power line communication between airport light terminal devices is connected to the power line modem 34. A sensor 35 that detects information about the airport light corresponding to the airport light terminal device M, for example, information such as the approach of an aircraft to the airport light, and a first power line modem 34 connected to a power line modem 34 via a capacitor 36.
And a second coil 38b connected to the power line PL via the capacitor 37, and includes a high-frequency bypass transformer 38 for compensating for loss in power line communication caused by the presence of the transformer Tr.

Here, when the sensor 35 is a sensor for detecting approach of an aircraft or a vehicle to the airport light, a vibration sensor can be used as the sensor 35, for example.

According to such a configuration, since both ends of the transformer Tr are short-circuited at a high frequency by the high-frequency bypass transformer 38, the number of airport light terminal devices performing the power line communication increases, and the length of the power line becomes longer. Even if becomes longer,
Attenuation of the signal on the high frequency side, that is, on the 400 KHz side can be suppressed to a small level.

In the configuration shown in FIG. 3,
Although the power supply to the power line modem 34 is configured to be performed through the coils 33a and 33b of the transformer 33, the driving circuit of the airport light 31 shown in FIG.
You may comprise so that it may perform via the transformer Tr.

When the airport light management device M0 issues an instruction to turn on and off the airport light terminal device M, the airport light 31 is turned on and off under the control of the power line modem 34.

FIG. 4 shows another example of the configuration of the airport light terminal device M configured as described above.

In the configuration shown in FIG. 4, a primary coil 3 of a transformer 33 for supplying power to a power line modem 34 is provided.
Instead of directly connecting 3a to the power line PL, the airport light 3
3 is different from the configuration shown in FIG. 3 only in that it is connected to the secondary side of the transformer Tr that supplies power to the power supply 1. Other configurations are the same as those shown in FIG. 3.

According to such a configuration, since the primary side of the transformer 33 has a low voltage stepped down by the transformer Tr, a transformer having a small capacity can be used as the transformer 33.

FIG. 5 shows an example of a mounting circuit when the airport light terminal device M shown in FIG. 4 is employed. In FIG. 5, for convenience of explanation, a sensor 35 for detecting the centering of the airport light 31 shown in FIG. 4 and a sensor 35 for detecting information such as the approach of an aircraft to the airport light are shown.
Is omitted.

In FIG. 5, a transformer Tr is connected to a power line P
The power line PL shown in FIG. 4 is connected to the terminals T11 and T12 on the primary side and the terminals T21 and T22 on the secondary side as shown in FIG.
Is connected.

The secondary side of the transformer Tr is the transformer 3
3 and supplies power to the power line modem 34. The signal input / output terminal of the power line modem 34 is connected to the primary side of a transformer Tr via a capacitor 36, a high frequency bypass transformer 38, and a capacitor 37. ,
That is, it is connected to power line PL.

In such a configuration, since the transformer Tr drives the airport light 31, it constitutes a large-capacity low-frequency circuit. The portion enclosed by the broken line in FIG. 5 is used for power line communication. , And constitute a small-capacity high-frequency circuit CO.

FIGS. 6 to 9 show examples of actual implementation of the circuit shown in FIG.

First, FIGS. 6 and 7 show a mounting example in which a rubber transformer sealed with rubber is used as the transformer Tr as a side view (FIG. 6) and a plan view (FIG. 7).

As shown in FIGS. 6 and 7, in this example of mounting, a transformer T using a rubber transformer is used.
r, the transformer 33 and the power line modem 3 shown in FIG.
4, capacitors 36 and 37, high frequency bypass transformer 3
8 are stacked and configured. Here, the power line PL shown in FIG. 4 is connected to the terminals T11 and T12, and the airport light 31 shown in FIG. 4 is connected to the secondary terminals T21 and T22.

FIGS. 8 and 9 show a side view (FIG. 8) and a plan view (FIG. 9) of another mounting example in which the transformer Tr and the high-frequency circuit CO are integrated by a rubber mold 50.

As shown in FIGS. 8 and 9, in this mounting example, the transformer Tr and the high-frequency circuit CO are integrated by a rubber mold 50. Also in this configuration, the power line PL shown in FIG. 4 is connected to the terminals T11 and T12, and the airport light 31 shown in FIG. 4 is connected to the terminals T21 and T22 on the secondary side.

In the above configuration, in the simple serial type lamp monitoring system shown in FIG. 1, the activation of this system causes the airport light management device M0 to operate the master terminal of the token passing power line communication in the lamp monitoring system. First, at this time, the airport light management device M0 serving as the parent terminal is the only one in the communication system having a frequency of 200 kHz to 4 kHz.
A communication carrier of 00 KHz is generated. The strength of the right to be the parent terminal is determined in the order of addresses in the downstream direction of the communication system. In the upstream direction, the larger the address, the stronger the right.

Here, from the viewpoint of the system design, at least the upper and lower four addresses are simultaneously received for the terminal having the token so that the contents of the information can be analyzed. When the parent terminal passes the token, the airport light terminal device to be the next parent terminal receives the token, performs information processing, generates a carrier, and sends the carrier to the airport light terminal device to be the next parent terminal. Pass the tokens sequentially.

At this time, if there is a failure in the airport light terminal device to be the next parent terminal, one of the four airport light terminal devices on the downstream side receives this token and returns to the parent terminal as follows. Becomes

In this manner, when the terminal reaches the terminal airport light terminal device, it turns back and returns to the upstream side, and this is repeated up to the airport light management device M0.

Here, the abnormal processing is applied also at the time of the return.

According to such a configuration, even if the length of the power line PL ranges from 4 km to 6 km, communication can be performed using only the power line PL.

Further, considering the case where the length of the power line PL is 4 km and the interval between the airport lights is 30 m, the time required to detect the disconnection of each lamp is about 6 seconds.

In the above-described embodiment, the case where the present invention is applied to the airport light monitoring system has been described. However, the present invention is not limited to this, and the same applies to a system using many such lights. Applicable.

[0071]

As described above, according to the present invention,
State detection means for detecting the state of the lamps corresponding to the plurality of lamps connected via the power lines are provided, and the state of the lamps detected by the detection means is detected by power line communication using the power lines. Since the configuration is such that the state of the plurality of lamps is monitored by transmitting and the communication loss compensating means for compensating for the loss of the power line communication is provided at the location where the lamps are disposed, a large number of airports and the like are provided. In addition, there is an effect that it is possible to accurately monitor the disconnection of a lamp such as an airport lamp or the information around the lamp with a simple and inexpensive configuration.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing an embodiment of a lamp monitoring system according to the present invention.

FIG. 2 is a block diagram showing a detailed configuration of an airport light management device serving as an initial parent terminal of the token passing power line communication shown in FIG.

FIG. 3 is a block diagram showing a detailed configuration of an airport lamp terminal device of the lamp monitoring system shown in FIG. 1;

FIG. 4 is a block diagram showing another detailed configuration of the airport light terminal device of the lamp monitoring system shown in FIG. 1;

FIG. 5 is a circuit diagram showing an example of a mounting circuit when the airport light terminal device shown in FIG. 4 is adopted.

6 shows an actual mounting example of the circuit shown in FIG. 5, and is a side view showing the mounting example when a rubber transformer is used as the transformer.

FIG. 7 is a plan view of the mounting example shown in FIG. 6;

FIG. 8 is a side view showing an actual mounting example of the circuit shown in FIG. 5 and showing another mounting example in which a transformer and a high-frequency circuit are integrated with a rubber mold.

FIG. 9 is a plan view of the mounting example shown in FIG. 8;

FIG. 10 is a circuit diagram showing an example of a conventional airport light control system at an airport.

FIG. 11 is a sectional view showing a state where power lines are laid in the control system shown in FIG. 10;

FIG. 12 is a diagram for explaining a distribution capacity generated by a power line in the control system shown in FIG. 10;

13 is an equivalent circuit diagram of a communication system when performing power line communication in the control system shown in FIG.

FIG. 14 is a graph illustrating attenuation characteristics of a communication signal when performing power line communication in the control system shown in FIG. 10;

FIG. 15 is a graph illustrating attenuation characteristics of a communication signal when performing power line communication in the control system illustrated in FIG. 10;

[Explanation of symbols]

 M0 Airport light management device M1-Mn Airport light terminal device PL Power line Tr Trans CO High frequency circuit 10 Constant current adjustment power supply device 21 Airport light 22 Disconnection detection sensor 23 Transformer 24 Power line modem 25 Control unit 31 Airport light 32 Disconnection detection sensor 33 Transformer 34 Power line modem 35 Sensor 36, 37 Capacitor 38 High frequency bypass transformer 50 Rubber mold 101 Piping 102 Air layer 103 Insulator

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05B 37/02 H05B 37/02 B 37/03 37/03 Z

Claims (13)

[Claims] 1. A lamp monitoring system for monitoring a state of a plurality of lamps connected via a power line, wherein: a state detecting means for detecting a state of the lamp; and the lamp detected by the state detecting means. A power line communication unit for transmitting the state of the power line by power line communication using the power line; and a communication loss compensating unit for compensating for the loss of the power line communication at a place where the lamp is provided. Monitoring system. 2. The lamp monitoring system according to claim 1, wherein said state detecting means detects a disconnection of said lamp. 3. A state of the lamp, wherein the state of the lamp detected by the state detecting means is provided, further comprising: proximity detecting means for detecting a state near the lamp. 2. The lamp monitoring system according to claim 1, wherein the power is transmitted by a power line communication unit using the power line. 4. The apparatus according to claim 1, wherein the lighting device is an airport light arranged at an airport, and the proximity detecting means detects the presence or absence of a moving object such as an aircraft approaching the airport light. The lamp monitoring system according to the above. 5. The power unit is connected via a first transformer connected in series to the power line, and the power line communication means is connected in parallel to the power line at a connection point of the first transformer. 2. A power line modem connected via a second transformer, wherein the communication loss compensating means comprises a high-frequency bypass transformer connected in parallel with the first transformer. Lighting monitoring system. 6. The lamp monitoring system according to claim 5, wherein said power line modem is supplied with a driving power through a secondary circuit of said first transformer. 7. The lamp monitoring system according to claim 5, wherein the drive power of the power line modem is supplied via the first transformer and the second transformer. 8. A high-frequency bypass transformer, comprising: a first coil connected in parallel to the power line via a first capacitor; and a high-frequency connected to the first coil via a second capacitor. The lamp monitoring system according to claim 5, further comprising: a second coil connected to the power line modem. 9. The lamp monitoring system according to claim 8, wherein a circuit including the first and second capacitors and the high-frequency bypass transformer is mounted on the first transformer. . 10. The lamp monitoring system according to claim 9, wherein said first transformer comprises a rubber transformer sealed with rubber. 11. The lamp according to claim 8, wherein the circuit including the first and second capacitors and the high-frequency bypass transformer is mounted by being rubber-molded integrally with the first transformer. Monitoring system. 12. The lamp monitoring system according to claim 1, wherein the power line communication by the power line communication means is performed between the power line modems by a token passing method. 13. A lamp monitoring system for monitoring the status of a plurality of lamps connected via a power line and for instructing turning on and off of the lamps, wherein a status detecting means for detecting the status of the lamps. A light-on / light-off command means for instructing turning on and off of the lamp, and a state of the lamp detected by the state detecting means and a command for turning on / off the lamp by instructing the light-on / off command means by the power line. 1. A lamp monitoring system, comprising: power line communication means for transmitting by power line communication using: and communication loss compensating means for compensating for the loss of the power line communication at a place where the lamp is provided.