JP2000048969A - Power line carrier communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain bidirectional communication between a master station and a slave station equivalent to a case where an exclusive signal line is used, without modifying an existing electric power source circuit system. SOLUTION: An operation desk 21 inputs a lighting control command relating to lighting control to a transmission master station 25 via a monitor 23 based on operation of an operator, an operation part generates a parallel signal serving as an origin for a transmission signal based on the control command in a transmitter 26 inside the master station 25, a power line carrier modem converts the parallel signal into a series signal to be fed to a power line 29 via a rubber transformer 28, a power line conveying modem takes the series signal on the power line 29 in via rubber transformers 331-33n inside respective slave stations 321-32n to convert it into a parallel signal, the operation part confirms a group ID or individual IDs based on the parallel signal, and lighting control is conducted thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power line transport system, and more particularly to a power line transport system for collectively monitoring and controlling the state of a large number of lights and sensors installed on a runway, a taxiway, etc. in airport facilities. About.

[0002]

2. Description of the Related Art Generally, home bus systems, refrigerated container ship centralized systems, school security systems,
BACKGROUND ART A power line carrier system is widely used for a vending machine management system, an automatic meter reading system for transmitting information such as power consumption, a system for detecting a center disconnection of an airport light, and the like.

FIG. 21 is a schematic diagram showing a configuration of a system for detecting a disconnection of an airport light. In this disconnection detection system, a printer 1 and a monitoring station (PC)
2 and the operation panel 3 and the analyzer (CS
A) A monitoring device 5 having 4 is connected to a plurality of CCRs (constant current regulators) 6 _{1 to} 6 ₃ . In addition, each CCR6
_{1-6 3} is connected to the annular power line 7, the power line 7 via a plurality of transformers 8 _{1-8 5} individually respectively Dancing detector 9
It is connected to the lamp 10 ₁ to 10 ₅ through _{1-9 5.} Incidentally, trans 8 _{1-8 5} between power line 7 and the lighting 10 ₁ to 10 _5, as shown in FIG. 22 (a), may be connected in series with each other, as shown in FIG. 22 (b) , May be connected in parallel with each other. Here, each transformer 8 ₁
8 _5, each cross-sectional core detectors 91 _to 93 ₅ and the lighting 10 ₁ to 10
₅ belongs to the slave station side.

[0006] As illustrated, in the daughter, the Dancing the lamp ₁₀₅ occurs, the cross-sectional core detector 9 ₅ corresponding trans 8 _5, the master station a signal via the power line 7 and CCR6 ₂ To the monitoring device 5 on the side. The monitoring device 5 analyzes this signal to detect the occurrence of the disconnection, and notifies the operation panel 3 and the monitoring station 2.

[0005] As described above, a one-sided communication method for analyzing a signal from a slave station in which a core has occurred is commonly used (AUTO MONITOR).
ING SYSTEM FOR AIRFILED LIGHTING SYSTEM: US5359325
A 941025).

On the other hand, in a disconnection detection system based on a polling system of two-way communication in which a slave station answers a request from a monitoring device on a master station side, a dedicated signal line is used without using power line carrier.

[0007] On the other hand, in the polling system, in a system in which monitoring and control is performed using power line carrier without using a dedicated signal line, high frequency noise generated when the CCR suppresses a certain current or more is avoided. From the viewpoint, the existing power supply circuit system is modified so as not to use the CCR.

[0008] Specifically, as shown in FIG. 23, in the daughter, each terminal (AE unit) connected to the lamp 10 ₁ to 10 ₄ 11 current _{regulator 1} to 11 ₄ has an inverter (SUPERVISION AND CONTROL OF
AIRPORT LIGHTING AND GROUND MOVEMENTS: US5426429
A 950120). As a result, the current can be adjusted for each terminal, and a bidirectional communication method using power line carrier is realized.

[0009]

As described above, in the power line carrier system, if an existing power supply circuit system is used,
To become time state changes such disconnection core detected (when abnormality occurs) only to the child station and one communication scheme for transmitting to the master station, lighting 10 ₁ -
10 ₅ and to know the state of the sensor takes time and effort that go out to the local.

On the other hand, in order to realize two-way communication in which a slave station answers a request from a master station, it is necessary to modify an existing power supply circuit system.

The present invention has been made in view of the above circumstances, and realizes the same two-way communication between a master station and a slave station as using a dedicated signal line without modifying an existing power supply circuit system. It is an object of the present invention to provide a power line carrier system which can be used.

[0012]

According to a first aspect of the present invention, a master station for monitoring and control and a plurality of slave stations for lighting control and moving object detection are connected via a power line. A power line carrier system for airports in which the master station and each of the slave stations perform a two-way communication by placing a carrier wave on the carrier station, and signal input means for inputting a light control signal related to the light control to the master station. A parallel signal generator configured to generate a parallel signal based on a lamp control signal input from the signal input unit, and a parallel signal generated by the parallel signal generator being converted into a serial signal. Parallel / serial conversion means for transmitting to the power line, and serial / parallel conversion arranged in each of the slave stations for taking in a serial signal on the power line transmitted by the parallel / serial conversion means and converting the serial signal into a parallel signal. Means The series / based on the parallel signals obtained by parallel conversion means is a power line carrier system comprising a light control means for executing the lighting control.

According to a second aspect of the present invention, in the power line carrier system according to the first aspect, each of the slave stations is provided for each light, and each of the lights is installed at least on a taxiway of the airport. A power line carrier system including a plurality of taxiway lights and a plurality of runway centerline lights installed on the runway of the airport.

According to a third aspect of the present invention, in the power line carrier system according to the first aspect, a sensor installed on the runway of the airport for detecting the presence or absence of the moving body, and a taxiway of the airport are provided. And a stop line light that is controlled to be turned on / off based on detection of a moving body by the sensor.

According to a fourth aspect of the present invention, in the power line carrier system according to the third aspect, when the master station detects the presence of a moving body on the runway by the sensor, the stop line light is used. Is a power line carrier system that controls ON of the power line.

According to a fifth aspect of the present invention, in the power line carrier system according to the first aspect, each of the slave stations transmits a parallel signal obtained by the serial / parallel conversion means to a lamp. 1 interface section,
And a second interface unit for transmitting a current state signal received from the lamp into the own station.

According to a sixth aspect of the present invention, in the power line carrier system according to the first aspect, the master station transmits a signal from the master station to each of the slave stations based on carrier sense on the power line. And a first frequency determining means for determining a frequency f1 of a serial signal transmitted toward the master station and a frequency f2 of a serial signal returned from each slave station toward the master station. The power line carrier system includes a second frequency determination unit that determines a frequency f3 of a spare serial signal with a value different from the frequencies f1 and f2 based on carrier sense on a line.

According to a seventh aspect of the present invention, in the power line carrier system according to the first aspect, the master station includes a group ID for identifying a group to which each of the slave stations belongs, and a group ID within the group. Each of the slave stations has a group ID for identifying a group to which the own station belongs, and a local ID within the group. The power line carrier system includes an ID storage unit that stores an individual ID shown.

(Operation) Therefore, according to the invention corresponding to claim 1, the signal input means inputs the lamp control signal relating to the light control to the master station, and the parallel signal in the master station is provided. Generating means for generating a parallel signal based on the lamp control signal input from the signal input means;
The serial conversion means converts the parallel signal generated by the parallel signal generation means into a serial signal and sends it to the power line, and the serial / parallel conversion means in each slave station transmits the signal on the power line sent by the parallel / serial conversion means. Since the serial signal is fetched and converted into a parallel signal, and the light control means executes the light control based on the parallel signal obtained by the serial / parallel conversion means, the existing power supply circuit is realized by using power line carrier. Without modifying the system, it is possible to realize the same bidirectional communication between the master station and the slave station as when using a dedicated signal line.

According to a second aspect of the present invention, each slave station is provided for each light, and each light is provided at least on a plurality of taxiway lights installed on an airport taxiway and on a plurality of airport runways. Claim 1 because it includes a runway centerline light
In addition to the operation corresponding to the above, the monitoring and control of the taxiway light and the runway centerline light can be easily and reliably performed.

According to a third aspect of the present invention, there is provided a sensor installed on a runway of an airport for detecting the presence or absence of a moving object, and a sensor installed on a taxiway of an airport and detecting a moving object by the sensor. And a stop line light that is on / off controlled.
When the master station detects the presence of a moving object on the runway by the sensor, the stop line light is turned on. Therefore, in addition to the action according to claim 1, another moving object exists on the runway where the moving object exists. Can be prevented from entering.

According to a fifth aspect of the present invention, as a slave station, the first interface unit transmits a parallel signal obtained by the serial / parallel conversion means to a lamp, and the second interface unit transmits the parallel signal from the lamp. Since the received current state signal is transmitted to the inside of the own station, the monitoring and control of the lamp can be easily and reliably performed in addition to the operation according to the first aspect.

According to a sixth aspect of the present invention, as the master station, the first frequency determining means transmits a serial signal transmitted from the master station to each slave station based on carrier sense on the power line. The frequency f1 and the frequency f2 of the serial signal returned from each slave station to the master station are determined, and as each slave station, the second frequency determining means determines the spare serial signal based on the carrier sense on the power line. Frequency f3 to frequency f1, f
Since it is determined by a value different from 2, power line carrier between the master station and the slave station can be easily and reliably realized in addition to the operation corresponding to claim 1.

Further, in the invention according to claim 7, as the master station, a group ID for identifying a group to which each slave station belongs and an individual ID indicating each slave station individually in the group are stored. Each of the slave stations has an ID storage means for storing a group ID for identifying the group to which the own station belongs and an individual ID indicating the own station in the group. In addition to the action corresponding to claim 1, a desired group ID or further individual ID
By designating, group control and individual control of each slave station can be executed easily and reliably.

[0025]

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

FIG. 1 is a schematic diagram showing a configuration of an airport light control device to which a power line carrier system according to one embodiment of the present invention is applied. This airport light control device is located in the central monitoring room 2
The operation desk 21 in the 1R is connected to the monitoring device 23 of the monitoring control panel 23P via the control LAN 22, and the monitoring device 23
Are connected to a master transmission device 26 and a slave transmission device 27 in a transmission master station 25 via a transmission LAN 24.

Main transmission device 26 and slave transmission device 27
Are connected to an annular power line 29 via a rubber transformer 28. The power line 29 is connected to an external CCR 31 via a filter 30 and has a plurality of slave stations 32 ₁ to 32 ₁ .
32 _n .

The slave station 32 ₁ to 32 _n is a configuration in which the transmission terminal 34 ₁ to 34C _n via the connection rubber transformer 33 ₁ ~ 33 _n to the power line 29 to control the lighting 35 ₁ to 35 _n I have.

Here, the operation desk 21 is operated by the operator to display information on the lights 35 _{1 to} 35 _n and sensors in the airport, control the state of the lights 35 _{1 to} 35 _n ,
4 ₁ to 34C _n operation test is for resetting the like of the transmission terminal 35 ₁ to 35 _n, has a function of transmitting and receiving information to the monitoring device 23 via the control LAN 22.

The operation desk 21, as specifically shown in FIG. 2, the first storage unit 21a for storing data such as the state of all the transmission terminals 35 ₁ to 35 _n, the share monitoring device 23 and information 2 storage unit 21b, key input unit 21c for accepting input by operation buttons (including screen touch), signal input / output port 21d for monitoring device 23, and monitoring and control between key input unit 21c and monitoring device 23 An operation unit 21e that performs data processing and updates the second storage unit 21b;
And a display section 21f for displaying a screen with reference to the second storage sections 21a and 21b.

The first storage unit 21a stores all transmission terminals 34 ₁ to 34 ₁ .
34 items in each data indicating the state of _n is stored, also the sub-stations 32 ₁ to 32 _n (total transmission terminals 34 ₁ -
34 _n ) are stored.

The second storage unit 21b holds information indicating the contents of each item in the first storage unit 21a. Specifically, the memory space on the LAN to which signals are assigned is periodically stored. The information is shared with the monitoring device 23 and stored by being scanned. As shown in FIG. 3, shared information includes logical conditions, system operation operations,
System operation availability display, mode switching, terminal operation availability display, transmission terminal current status, lamp monitoring / control, lamp abnormality display, sensor status monitoring, sensor abnormality display, transmission terminal test, sensor test, alarm processing operation Indicates the content (current value, etc.).

As shown in FIG. 4, the monitoring device 23 includes a first storage unit 23a for sharing information with the operation desk 21, and a transmission L.
A second storage unit 23b that shares information with a transmission master station 25 that controls one power supply circuit in the AN 24, a first signal input / output port 23c for the operation desk 21, and a second signal input / output port for the transmission master station 25. 23d, both signal input / output ports 23c, 2
An operation unit 23e for realizing each function described later with reference to both storage units 23a and 23b between 3d is provided, and has a function of constantly monitoring information from the operation desk 21.

The transmission master station 25 includes two transmission devices 26 and 27 of a main system and a sub system, a rubber transformer 28 and a filter 30.
It consists of. In addition, as the transmission master station 25,
Omit the secondary transmission device 27 for providing redundancy,
Only the main transmission device 26 may be provided. Each transmission device 2
6 and 27 have the same configuration, so that the main transmission device 26
Will be described as an example.

As shown in FIG. 5, the transmission device 26 includes a first storage unit 26 that shares information with the monitoring device 23.
a, the second storage unit 26b that share a transmission terminal 34 ₁ to 34C _n and information, the first signal input port for the monitoring device 23 2
6c, power line carrier modem 26d and second signal input / output port 26e for transmission terminals 34 _{1 to} 34 _n , monitoring device 23
Between the storage units 26a, 2 between the transmission terminals 34 _{1 to} 34 _n.
An operation unit 26f having a signal processing function for realizing each function described below with reference to FIG. 6b and a function of determining frequencies f1 and f2 is provided.

As shown in FIG. 6, the power line carrier modem 26d includes a parallel / serial conversion circuit 36a for converting parallel information in the transmission device 26 into serial information and transmitting the serial information to the power line 29, And a serial / parallel conversion circuit 36b for converting the serial information on 29 into parallel information and taking it into the transmission device 26.

As shown in FIG. 7, the transmission signal transmitted from the transmission device 26 to the power line 29 is a text composed of data 1, data 2, data 3, and data 4 having different meanings, and a transmission control signal. It has a configuration. As data 1 to data 4, for example, the contents shown in FIG. 8 can be used. In FIG. 8, GP ID is a group ID, and as shown in FIG.
The 2 ₁ to 32 _n means the identification information for identifying each group of cases classified in any of the M groups. Individual I
D is identification information for identifying the slave station 32 ₁ to 32 _n in the group. As shown in FIG. 10, one slave station 32 _i (i is an arbitrary number, and the same applies to other subscripts) is specified by a combination of the group ID and the individual ID. Also, as shown in the figure, by providing the transmission master station 25 with the group ID and the individual ID, the same power supply circuit (one loop) is provided.
, A plurality of transmission master stations 25 may be introduced.

The transmission terminals 34 _{1 to} 34 _n are connected to the respective lights 35 ₁
To 35 _n and each sensor (not shown), and based on a signal received from the transmission master station 25, a corresponding lamp 35
_For monitoring and controlling _{1 to} 35 _n and sensors,
Specifically, as shown in FIG. 11, a storage unit 34a in which data of the lamp 35 / sensor is stored, a signal input / output unit (interface unit) 34b for the lamp / sensor, a power line carrier modem 34c for the transmission master station 25, It has a signal input / output port 34d, an arithmetic unit 34e having a signal processing function between the lamp 35 / sensor and the transmission master station 25 and a frequency f3 determination function.

The transmission terminals 34 _{1 to} 34 _n are connected to the power line 2
As shown in FIG. 12, the transmission signal to be transmitted to No. 9 has a text configuration including its own group ID, individual ID, and status.

The lights 35 _{1 to} 35 _n include, for example, a taxiway light TWCL and a stop line light SBL disposed on an airport taxiway, and a runway centerline light RWCL disposed on a runway. As each sensor, for example, there is a sensor that is disposed on a runway and detects the presence or absence of a moving object such as an aircraft. here,
Each of the lights 35 _{1 to} 35 _n and each sensor have a relationship such that when the sensor detects a moving object on the runway, the stop line light SBL in the taxiway is turned on under the control of the transmission master station 25. There are also things. In this case, the stop line light SBL is turned on from the viewpoint of preventing other moving bodies from entering the runway.

In the aeronautical light control device as described above, from the viewpoint of smooth transmission on the power line 29, the transmission signal on the power line 29 has any one of the three frequencies f1 to f3 according to the transmission direction and the content of the transmission. Is used.

That is, the transmission master station 25-transmission terminal 34 ₁
As shown in FIG. 13, three frequencies f1 to f3 are used for transmission between 間 の 34 _n . Here, the frequency f1 is used to signal to the transmission terminal 34 ₁ to 34C _n from the transmission master station 25, the frequency f2, the corresponding transmission terminal 34 ₁ to 34C _n
To the transmission master station 25. Frequency f3
Is used for a signal from the transmission terminal 34 _i that has detected an abnormality to the transmission master station 25. As the values of the frequencies f1, f2, and f3, for example, 10 kHz, 20 kHz, and 30 kHz can be used.

Next, the operation of the airport light control device configured as described above will be described in the order of frequency rise, each function, group simultaneous monitoring, individual state polling, group simultaneous control, and individual control.

(Rise of Frequency) The rise of the frequency used for power line carrier is performed and managed by the transmission master station 25 as shown in FIG.

Now, all the transmission terminals 34 _{1 to} 34 _n
Until a channel setting command is received, reception is waited in a receivable state (multi-channel accessible state) on all channels.

Here, the transmission master station 25 sequentially assigns several kinds of prepared frequencies f1, f2,..., Fn to the channels ch1, ch2,. That is, the channels are sequentially activated from channel ch1 (ST
1) Check whether or not the channel is usable by carrier sense (ST2).

The carrier sense means that several frequencies prepared in advance are sequentially activated, and if the currently activated frequency does not exist in the power line 29 (including noise), it is determined as a frequency to be used sequentially. It is a method to do.

When the frequency of the channel ch1 is in use, the channel ch is updated by "+1" (ST3),
It is similarly checked whether the frequency can be used at the frequency of the channel ch2. Once the transmission channel has been determined in this way, it is then checked whether another channel is available to determine the reception channel. However, here, it is assumed that ch1 (frequency f1) is determined to be a transmission channel because it is not used (ST4), and ch2 (frequency f2) is determined to be a reception channel because it is not used (ST).
5).

[0049] Then, the transmission master station 25, the transmission channel ch1, the receiving channel ch2 and the transmission signal is transmitted channels ch1 containing group ID (frequency f1), the slave station 32 _j to 32 _k transmission terminal 34 _j of -34 _{The signal} is transmitted to the power line 29 toward _k (j and k are both arbitrary numbers).

When the transmission terminals 34 _{1 to} 34 _n receive this transmission signal, they set the receiving channel ch2 (S
T6), a transmission channel is set (ST7), and it is determined whether or not the group ID indicates the own station (ST8). When the own station is not indicated, there is no response (ST9). A reply is sent to the transmission master station 25 through the channel ch2 (frequency f2).

Hereinafter, a normal diagnosis / control operation is performed for these two channels ch1 and ch2 as shown in FIG.
This is performed using

However, the transmission to the transmission master station 25 when the abnormality is detected is performed by the transmission terminal 34 _i that has detected the abnormality by the channel ch.
3 (frequency f3) (ST11 to ST1).
3).

Since the frequencies f1 to f3 of the channels ch1 to ch3 are determined by the carrier sense, a state in which data cannot be transmitted due to the rise of the same frequency is avoided.

(Each Function) FIG. 15 is a schematic diagram for explaining each function on the upper side than the transmission master station 25. Each of these functions performs power line transfer according to the present invention on a lower side than FIG. 15, and therefore, the following briefly describes the monitoring device 23. Regarding the power line carrier between the transmission master station 25 and the slave stations 32 _{1 to} 32 _n used in each function, after the explanation of each function, there are four cases of group / individual and monitoring / control. I will describe.

The monitoring device 23 is provided with the arithmetic unit 2 described in FIG.
3e, a system status processing unit 41, a transmission terminal status processing unit 42, and an alarm processing unit 43 are provided.

The system state processing section 41 includes a fail safe setting section 41a, a system operation state processing section 41b, a system operation availability processing section 41c, and a mode information transmission section 41d.
have.

When there is a change in operation / non-operation in the system operation state processing unit 41b, the fail safe setting unit 41a turns on / off the fail safe mode based on the visibility information in the logical condition held in the operation desk 21. Has the function of setting Here, the logical condition has visibility information for determining the degree of visibility, and based on this visibility information, the luminosity of the lamp 35 installed on the runway is 0 to 5 or less.
It is for determining.

When a system operation operation for designating operation / non-operation of the monitoring device 23 is performed at the operation desk 21, the system operation state processing unit 41 b sets its own monitoring device 23 in the operation state or the non-operation state according to the operation. Function and
When a state test operation for designating a test of the slave station 32 is performed at the operation desk 21, the monitoring device 23 is operated in accordance with the operation.
Has a function to set the mode to the under test mode. here,
System Operation Operation is at during operation desk 21 and several monitoring devices 23 ₁ ~ 23 _k, an input operation of information specifying whether to use the monitoring device 23 _i.

The system operation availability processing unit 41c sequentially
It has a healthy counter function of transmitting a signal including date and time information to the operation desk 21. That is, the operation desk 2
1, the signal is no longer received and the monitoring device 23
Is detected and a display is possible.

When the mode information for designating the initiative of the operation as the control tower or the central monitoring room 21R is set from the operation desk 21, the mode information transmitting section 41d, for example, performs a 1/2 system It has a function of providing the transmission master station 25 with designation information of a monitoring control system corresponding to the control tower or the central monitoring room 21R, such as the main / sub.

The transmission terminal status processing unit 42 includes a fail-safe processing unit 42a, a system operation availability processing unit 42b, a lamp monitoring / control unit 42c, a sensor status processing unit 42d, a transmission terminal status test unit 42e, and a sensor status test unit 42f. Have.

The fail-safe processing section 42 a
Alternatively, when a failure is detected in the sensor, if the fail-safe mode of the fail-safe setting section 41a is in an on state, the fail-safe processing section 41a has a function of performing a fail-safe process of sending a reset signal to a target in which the failure is detected. In the fail-safe process, a reset signal is output all at once to reset a number of transmission terminals 34, lights 35, or sensors in the same power line 29.

The terminal operation availability processing section 42b is connected to the transmission master station 2
5 sequentially from the transmission terminal 34 ₁ to 34C _n via has a determining Healthy counter function individually operational availability of the transmission terminal 34 ₁ to 34C _n on the basis of the signals received, providing the determination result to the operation desk 21 Has a function.

When the light monitoring / control section 42c receives control commands such as transmission terminal on / off, luminosity 0-5, lighting / flashing / lighting off from the operation desk 21, the light monitoring / control section 42c determines whether or not there is communication between the transmission master stations 25. It is determined that when communication is present, the fact that communication is in progress is given to the operation desk 21, and when there is no communication, this control command is transmitted to the transmission master station 25.

The lamp monitoring / control section 42c transmits a status signal indicating the status of the slave station 32 to this control.
5, a function of giving this state signal to the operation desk 21, a state monitoring function of giving a state signal received from the transmission master station 25 as a response to the control command to the operation desk 21,
It has an abnormality monitoring function of notifying the fail safe processing unit 42a and the operation desk 21 of the presence of an abnormality when receiving an abnormality signal indicating the presence of an abnormality such as a disconnection from the transmission master station 25.

When receiving the control command relating to the transmission terminal ON / OFF, the sensor status processing unit 42d transmits this control command to the transmission master station 25 while determining whether there is communication between the transmission master stations 25 as described above. Control function to provide a status signal indicating detection / non-detection of a moving object to the operation desk 21 received from the transmission master station 25, and when an abnormality signal indicating a sensor abnormality is received from the transmission master station 25. And an abnormality monitoring function for notifying the fail safe processing unit 42a and the operation desk 21 of the presence of an abnormality.

The transmission terminal status test section 42e is provided with a test function of providing a terminal test signal received from the operation desk 21 to the transmission master station 25 and a response signal indicating normality or abnormality received from the transmission master station 25 as a response to the terminal test signal. based determines normality or abnormality of the transmission terminals 34 ₁ to 34C _n and has the function of providing the determination result to the operation desk 21.

The sensor status test unit 42f has a test function of providing a sensor test signal received from the operation desk 21 to the transmission master station 25, and a sensor input status signal received from the transmission master station 25 in response to the sensor test signal.
It has the function given to 1.

The alarm processing section 43 appropriately executes an alarm stop, a flicker stop, a display return, or a lamp test by operating the operation desk 21.

Here, a screen corresponding to each function is formed for each transmission master station 25. For example, the light monitoring list screen
As shown in FIG. 16, the name of the monitoring device 23 (A runway facility in the figure) and the name of the transmission master station 25 (B lighting area in the figure) are displayed for each area of the airport, and each transmission master is displayed. Station 2
5, the state of the lamp (（in the figure) and the sensor (x in the figure) connected via the power line 29 is displayed.

The monitoring list screen is developed on the control screen by an operation of pressing an operation button when the operator performs control. FIG. 17 is a schematic diagram showing an example of the light control screen. As shown, the state of each lamp is displayed for each group. For example, when a control button is pressed to specify a group ID and the type of control is selected to be off, on, or blink, the lights 35 of the specified group ID are controlled at once. If an individual ID is also specified when specifying the group ID, only the lamp 35 corresponding to the individual ID in the group is controlled.

The above functions are performed by the transmission master station 2.
5 and each of the slave stations 32 _{1 to} 32 _n are implemented using group simultaneous monitoring, individual polling, group simultaneous control, or individual control. Less than,
These four methods will be sequentially described.

(Group Simultaneous Monitoring) In the group simultaneous monitoring, as shown in FIG. 18, the transmission master station 25 simultaneously monitors, for example, the lights 35 _{1 to} 35 ₃ and the sensors in the same group, 1: n communication. This method is always executed after the initial value setting at the time of startup, except for the group simultaneous control.

[0074] Transmission master station 25 is currently of which lighting 35 _{1-35 3} grasps the state (lit in Figure 17, off, the cross-sectional core, etc.)
And information on the presence or absence of detection of a moving object by a sensor, and the group I
D is generated at the frequency f1, and this modulated signal is transmitted via the power line 29 to the transmission terminals 3 in the same group.
4 to send to _{1-34 3.}

[0075] Among the transmission terminals 34 ₁ to 34 _3, for example, the transmission terminal 34 _1, this actual state into a state of being grasped shown in the modulation signal and are different. In this case, the transmission terminal 34 ₁ raises the frequency f3 on the idle channel ch3 as shown in FIG.

[0076] Thereafter, the transmission terminal 34 _1, by the frequency f3, create a modulated signal including a group ID and an individual ID, and replies the existence of abnormality through the power line 29 by the modulated signal to a transmission master station 25.

As described above, the transmission master station 25 communicates with each of the slave stations 32 _{1 to} 32 ₃ (each of the transmission terminals 34 _{1 to} 34 ₃₎ in the same group.
Since monitoring a ₃₎ simultaneously, an abnormality of the individual transmission terminals 34 ₁ 1: it is possible to detect earlier than one communication.

[0078] (individual state polling) individual state polling, as shown in FIG. 19, first transmission master station 25 to query individually for example, each transmission terminal 34 ₁ to 34 _11: 1 of the communication system, the group At the time of simultaneous monitoring, the transmission terminal 34
_{When i} responds to the transmission master station 25 that there is an abnormality, the transmission master station 25 executes the process for the transmission terminal 34 _i that has responded.

[0079] Transmission master station 25, to the transmission terminal 34 _i that returns an abnormality, the to the text shown in FIG. 7, the state inquiry. The transmission terminal 34 _i receiving the inquiry,
Based on the text shown in FIG. 12, a modulation signal including states such as detection of disconnection of the lamp 35 _i and detection of abnormality of the transmission path is returned to the transmission master station 25 via the power line 29.

[0080] Thus, the transmission master station 25, abnormality relates transmission terminal 34 _i that replied to, it is possible to grasp the specific contents of the abnormality.

(Group Simultaneous Control) As shown in FIG. 20, the group simultaneous control is a 1: n communication in which the transmission master station 25 simultaneously controls, for example, each of the lights 35 _{1 to} 35 ₂₁₅ in the same group. Each transmission terminal 3 from the transmission master station 25
4 _1-34 a unilateral communication system to _215, by an input operation of the operator on the screen such as shown in FIG. 17, the group ID
And when the transmission master station 25 receives the lamp-specific control command.

The transmission master station 25 has the text configuration shown in FIG. 7 in order to simultaneously change the state of all the transmission terminals 34 _{1 to} 34 ₂₁₅ in the group based on this lamp-specific control command. A modulation signal including an ID and a lamp-specific control command is created at a frequency f1, and this modulation signal is
9, each of the transmission terminals 34 _{1 to} 34 _{21 5} in the same group
Send all at once.

Each of the transmission terminals 34 _{1 to} 34 ₂₁₅ demodulates the modulated signal, and according to a lamp-specific control command indicating lighting, blinking, extinguishing, luminous intensity, or the like included in the modulated signal, the lamp 35.
_{1 to} 35 ₂₁₅ are controlled. At this time, the transmission terminal 34 _{1-34 215} does not perform the response.

[0084] Thus, the transmission master station 25, and controls all at once lamp 35 _{1-35 215} each slave station (the transmission terminal 34 _{1-34 215),} the state of each lamp 35 _{1-35 215} It can change faster than 1: 1 communication.

The group simultaneous control is not limited to the input operation by the operator. When the sensor detects a moving body on the runway, such as the sensor and the stop line light SBL, the transmission master station 25 A configuration in which the stop line light SBL in the taxiway is automatically turned on by control may be included.

(Individual control) The individual control is a 1: 1 communication system in which the transmission master station 25 controls a lamp 35 _i connected to one transmission terminal 34 _i , similarly to the individual polling shown in FIG. Yes, group I is input by the operator
This is executed when the transmission master station 25 receives D, the individual ID, and the lamp-specific control command.

[0087] Transmission master station 25, based on the lamp-specific control command for changing the state of desired transmission terminal 34 _i, has a text configuration shown in FIG. 7, the group ID,
The modulation signal including the individual ID and the control command for each lamp is converted to a frequency f
1 and transmits the modulated signal to the desired transmission terminal 34 _i via the power line 29.

[0088] Each transmission terminals 34 ₁ to 34C _n demodulates the modulated signal, and the group ID and an individual ID is determined whether indicating its own, when not exhibit self ignores lamp based control command.

[0089] Only the specified transmission terminal 34 _i includes a group ID and an individual ID since determining that the indicating its own, controls the state of the lamp in accordance with lighting by the control command. Further, the transmission terminal 34 _i returns the state after the control to the transmission master station 25 using the text shown in FIG.

As described above, since the transmission master station 25 individually controls a desired lamp state, it is possible to perform fine control. Also, by receiving a reply from the transmission terminal 34 _i, it is possible to grasp the result of the control.

As described above, according to the present embodiment, the operation desk 21 inputs a lighting control command relating to lighting control to the transmission master station 25 via the monitoring device 23 by the operation of the operator, and Calculation unit 26e of the transmission device 26
Generates a parallel signal that is a source of the transmission signal based on the lamp control command, and the power line carrier modem 26d converts the parallel signal into a serial signal, and converts the parallel signal into a serial signal via the signal input / output port 26e and the rubber transformer 28. The power is transmitted to the power line 29, and each of the slave stations 32
₁ power line carrier modem 34c in each transmission terminals 34 ₁ to 34C _n in to 32 _n is, rubber transformer 33 ₁ ~ 33 _n
And a serial signal on the power line 29 via the signal input / output port 34d to be converted into a parallel signal, and the operation unit 34e calculates a group ID or an individual ID based on the parallel signal.
After confirming that the lighting control is executed, the existing power supply circuit system is not modified by using the power line carrier, and the same bidirectional communication between the master station and the slave station as when a dedicated signal line is used. Can be realized.

Further, each of the slave stations 32 _{1 to} 32 _n has a lamp 35 _1.
35 is provided for each _n, include a plurality of runway centerline lights RWCL each lighting 35 ₁ 35 _n is installed in the runway of a plurality of guide paths lamp TWCL and airport installed in taxiway least airports There are taxiway lights TWCL and runway centerline lights RWCL
Can be easily and reliably executed.

Further, a sensor installed on the runway of the airport to detect the presence or absence of a moving object, and a stop line light SBL installed on the taxiway of the airport and controlled to be on / off based on the detection of the moving object by the sensor. When the transmission master station 25 detects the presence of a moving object on the runway by the sensor, the stop line light SBL is turned on so that another moving object enters the runway on which the moving object exists. Can be prevented.

Further, the signal input / output port 34b of each of the transmission terminals 34 _{1 to} 34 _n transmits the parallel signal obtained by the power line carrier modem 34c and the operation unit 34e to the lights 35 _{1 to} 35 _n.
Sent to, also, the current state signal received from the lighting 35 _{1-35 n} so sent to the local station unit, lamp 35 _1-35
n can be easily and reliably monitored and controlled.

Further, based on carrier sense on the power line 29, the transmission master station 25
The frequency f1 of the serial signal to be transmitted toward _{1 to} 32 _n and the frequency f2 of the serial signal returned from each of the slave stations 32 _{1 to} 32 _n to the transmission master station 25 are determined. In addition, each slave station 32
_{1 to} 32 _n determine the frequency f3 of the spare serial signal with a value different from the frequencies f1 and f2 based on the carrier sense on the power line 29. Therefore, in the power line carrier between the transmission master station and the slave station, three different frequencies f1 to f1
Since f3 can be ensured, power line conveyance can be easily and reliably realized.

Further, in the transmission master station 25, each slave station 32 ₁
Group I for identifying the group to which ~ 32 _n belongs
D and an individual ID indicating each of the slave stations 32 _{1 to} 32 _n in the group are stored. In each of the slave stations 32 _{1 to} 32 _n ,
Group I for identifying the group to which each station belongs
D and an individual ID indicating the own station in the group are stored. For this reason, by specifying a desired group ID and further an individual ID, it is possible to easily and reliably execute the group control and the individual control of each of the slave stations 32 _{1 to} 32 _n .

According to the present embodiment, the light 3
5 ₁ ~35 _n · sensor without state going to see of, can be grasped by the operation desk 21 of the central monitoring chamber 21R, also,
Since the lighting / sensor monitoring control of the airport can be remotely controlled in a lump at the central operation desk 21, automatic operation of the airport can be achieved. As a result, cost reduction in airport operation can be achieved.

In addition, since the use of power line carrier does not require a dedicated signal line, it can be realized at low cost. In addition, the applicable range is not limited to airports to be introduced in the future,
It is widely applicable to existing airports.

In the above embodiment, the airport light control device has been described as an example. However, the present invention is not limited to this. By installing a transmission terminal on various devices, a home bus system other than the airport, a refrigerated container ship, etc. The present invention can be implemented in the same manner and the same effect can be obtained even if the present invention is applied to a system, a school security system, a vending machine management system, an automatic meter reading system for transmitting information such as the amount of power consumption, and the like.

In addition, the present invention can be variously modified and implemented without departing from the gist thereof.

[0101]

As described above, according to the present invention, it is possible to realize the same two-way communication between the master station and the slave station as in the case where a dedicated signal line is used, without modifying the existing power supply circuit system. The obtained power line carrier system can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of an airport light control device to which a power line carrier system according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of an operation desk in the embodiment.

FIG. 3 is a schematic diagram showing shared information in a second storage unit in the embodiment.

FIG. 4 is a block diagram showing the configuration of a monitoring device according to the embodiment;

FIG. 5 is a block diagram showing the configuration of the transmission apparatus according to the embodiment;

FIG. 6 is a schematic diagram showing a configuration of a power line carrier modem in the embodiment.

FIG. 7 is a schematic diagram showing a text configuration of a transmission signal from a master station in the embodiment.

FIG. 8 is a schematic diagram showing an example of data in a transmission signal from a master station in the embodiment.

FIG. 9 shows a group ID and an individual ID in the embodiment.
Schematic diagram for explaining

FIG. 10 shows a group ID and an individual I in the embodiment.
Schematic diagram for explaining D

FIG. 11 is a block diagram showing the configuration of a transmission terminal according to the embodiment;

FIG. 12 is a schematic diagram showing a text configuration of a transmission signal from a slave station in the embodiment.

FIG. 13 is an exemplary view for explaining transmission between a master station and a slave station in the embodiment.

FIG. 14 is a view for explaining the rise of the frequency in the embodiment.

FIG. 15 is a schematic diagram for explaining each function in the embodiment.

FIG. 16 is a schematic diagram showing an example of a light monitoring list screen according to the embodiment.

FIG. 17 is a schematic diagram showing an example of a light control screen according to the embodiment.

FIG. 18 is a schematic diagram for explaining group simultaneous monitoring in the embodiment.

FIG. 19 is a schematic diagram for explaining individual state polling in the embodiment.

FIG. 20 is a schematic view for explaining group simultaneous control in the embodiment.

FIG. 21 is a schematic diagram showing a configuration of a conventional airport light centering detection system.

FIG. 22 is a schematic diagram showing a connection configuration of a conventional lamp.

FIG. 23 is a schematic diagram showing a connection configuration of a conventional lamp.

[Explanation of symbols]

21R: Central monitoring room 21: Operation desk 22: Control LAN 23P: Monitoring control panel 23: Monitoring device 24: Transmission LAN 25: Transmission master station 26: Master transmission device 27: Subordinate transmission device 28, 33 _{1 to} 33 _n ... Rubber transformer 29 ... Power line 30 ... Filter 31 ... CCR 32 _{1 to} 32 _n ... Slave station 34 _{1 to} 34 _n ... Transmission terminal 35 _{1 to} 35 _n ... Light 21a, 23a, 26a ... First storage unit 21b, 23b, 26b ... Second storage unit 21c ... Key input unit 21d, 23c, 23d, 26c, 26d, 34b, 3
4d Signal input / output ports 21e, 23e, 26f, 34e Arithmetic unit 21f Display unit 26d, 34c Power line carrier modem 34a Storage unit 41 System state processing unit 41a Fail safe setting unit 41b System operation state processing Unit 41c ... System operation availability processing unit 41d ... Mode information transmission unit 42 ... Transmission terminal status processing unit 42a ... Fail safe processing unit 42b ... System operation availability processing unit 42c ... Light monitoring / control unit 42d ... Sensor status processing unit 42e ... Transmission Terminal state test unit 42f Sensor state test unit 43 Alarm processing unit f1 to f3 frequency

 ──────────────────────────────────────────────────の Continued on the front page F-term (reference) DA09 5K046 AA03 BA03 BB06 CC16 CC18 PP01 PS03 PS05 PS31 PS43 PS47

Claims (7)

[Claims] A master station for monitoring and control and a plurality of slave stations for lighting control and moving object detection are connected via a power line,
A power line carrier system for airports in which a carrier wave is placed on the power line and the master station and each of the slave stations perform two-way communication, and a signal for inputting a light control signal related to the light control to the master station. Input means, arranged in the master station, a parallel signal generating means for generating a parallel signal based on the lamp control signal input from the signal input means, and serially generating the parallel signal generated by the parallel signal generating means. A parallel / serial conversion means for converting the signal into a signal and sending the signal to the power line; and a serial signal arranged in each of the slave stations for taking in the serial signal on the power line sent by the parallel / serial conversion means and converting the signal into a parallel signal. Power line transport system, comprising: a / parallel converter; and a lamp controller for executing the lamp control based on the parallel signal obtained by the serial / parallel converter. 2. The power line carrier system according to claim 1, wherein each of the slave stations is provided for each light, and each of the lights is at least a plurality of taxiway lights installed on a taxiway of the airport and a gliding of the airport. A power line transport system comprising a plurality of runway centerline lights installed on a road. 3. The power line transport system according to claim 1, wherein the sensor is installed on a runway of the airport and detects the presence or absence of the moving object, and the moving object is installed on a taxiway of the airport and is provided by the sensor. And a stop line light that is turned on / off based on the detection of the power line. 4. The power line transmission system according to claim 3, wherein the master station turns on the stop line light when the sensor detects the presence of a moving object on the runway by the sensor. Transport system. 5. The power line carrier system according to claim 1, wherein each of the slave stations receives a parallel signal obtained by the serial / parallel converter from a lamp. A power line carrier system, comprising: a second interface unit for transmitting a current state signal into the own station. 6. The power line carrier system according to claim 1, wherein the master station transmits a frequency f1 of a serial signal transmitted from the master station to each of the slave stations based on carrier sense on the power line. A first frequency determination unit for determining a frequency f2 of a serial signal returned from each of the slave stations to the master station, wherein each of the slave stations performs a spare serial connection based on carrier sense on the power line. The frequency f3 of the signal is changed to the frequencies f1, f
2. A power line carrier system comprising: a second frequency determining unit that determines a value different from 2. 7. The power line carrier system according to claim 1, wherein the master station has a group ID for identifying a group to which each slave station belongs and an individual ID for individually indicating each slave station within the group. Each of the slave stations has a group ID for identifying a group to which the own station belongs, and an ID storage means for storing an individual ID indicating the own station within the group. A power line carrier system, comprising: