JP2000286756A - Monitor control system using dip system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a monitor control system adopting a dip system where power is on/off-controlled so as to change waveform of a power supply and traffic in an airport or the like is controlled and monitored by using the change in the power waveform for a signal. SOLUTION: The monitor control system includes a means 63c that turns on/off a secondary side of a power supply according to a specific period to change a waveform of power, a signal transmitter 63 that uses a change in the power waveform as a signal to supply power having the power supply waveform to a power line, and a terminal 66 having a means that analyzes the power supply waveform from the signal transmitter to conduct communication control and applies a power line carrier network for traffic control and monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power line carrier system and a communication system thereof, and more particularly, to a centralized monitoring and control of countless lights and sensors installed on a runway, a taxiway, etc. in an airport facility. The present invention relates to a power line carrier system and a communication system thereof.

[0002]

2. Description of the Related Art Conventionally, when a lamp is disconnected, the secondary side of a rubber transformer to which the lamp is connected is released,
Magnetic saturation was occurring. At this time, the rise of the output current of the constant current generator (CCR) becomes slow until the rubber transformer is magnetically saturated, and has a waveform whose rise is delayed as compared with the case where the core break does not occur. While the rising of the output current is delayed (saturation time α), the waveform suddenly rises. I was monitoring this condition.

[0003]

However, in the conventional method of monitoring the saturation of the output voltage, it is difficult to specify the saturation time, and it is difficult to obtain a signal because the swelling is not constant. . The reason was that the magnetic saturation time of the rubber transformer was not constant, so it was obtained based on the area difference due to time integration with the normal time, but the waveform itself during the normal time was not stable, Was low.

[0004] It is an object of the present invention to provide a dip-type monitoring and control system in which a power supply is turned on / off to change a power supply waveform, and using this as a signal to monitor and control traffic at an airport or the like.

[0005]

According to the present invention, there is provided means for changing a power supply waveform by turning on / off a secondary side of a power supply according to a specific cycle, and using the change in the power supply waveform as a signal.
A signal transmission device for supplying power having the power supply waveform to a power line, and a terminal having means for analyzing a power supply waveform from the signal transmission device and performing communication control, and applying the power line carrier network to traffic control monitoring. , A monitoring control system using a dip method.

That is, in the present invention, the power supply waveform is changed by opening the power supply line on the secondary side for a certain period of time and turning on / off the secondary side of the power supply in accordance with a predetermined specific cycle. Using the change in the power supply waveform as a signal,
The power having the same power supply waveform is supplied to the power line, and the signal receiving side monitors only a specific frequency component of the power supply waveform, and determines the presence or absence of a signal based on a change in the component. In this case, each half-wave of the power supply frequency is set as one information unit, and a signal of a pattern determined on the transmission side is put on the power supply waveform,
Enables monitoring and control of lights.

The present invention provides a dip-type supervisory control system in which the terminal and the signal transmission device include both a transmission unit and a reception unit, and enable two-way communication.

The present invention provides a dip-type monitoring and control system in which both the terminal and the signal transmission device have a detection circuit for allocating each cycle of a power supply frequency to each and synchronizing signals.

The present invention provides a dip-type supervisory control system in which the terminal and the signal transmission device use means for generating reverse power as signal transmission means.

The present invention provides a dip-type monitoring control system in which the terminal and the signal transmission device use means for causing a load change as signal transmission means.

The present invention provides a dip-type monitoring and control system in which the signal transmission device directly turns on / off the power supply on the primary side and directly monitors the power supply waveform to be monitored on the primary side.

According to the present invention, the terminal and the signal transmission device may use a carrier wave as a transmission method from the signal transmission device to the terminal, and a secondary side of a power supply may be used in a transmission method from the terminal to the signal transmission device. And a dip-type monitoring and control system for turning on / off the switches.

[0013]

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

According to the configuration of the system shown in FIG.
An operation console, that is, an operation disk 12 and a monitoring control panel 13 are installed in a central monitoring room 11 of the air traffic control tower. The monitoring control panel 13 of the central monitoring room 11
Is connected to a master station control panel (signal transmission device) 16 of the electric room 15. The master station control panel 16 is provided with a constant current generator (CC).
R) The power from 17 is supplied to the power line system 18. The power line system 18 is connected to a terminal (slave station) 19 for controlling lights such as a center line light, a stop line light, and an approach light on a runway or a taxiway in an airport. Supply.

In the system configuration as described above, the information collection at the center is such that the master station control panel 16 acquires the lamp information from the terminal 19 installed on the lamp and can download it to the host system. The upper system includes an operation disk 12 and a monitoring and control panel 13 provided in a central control room 11, and the operation disk 12 includes a light in an airport, information display of sensor information, control of a light state, and a terminal. Of the terminal, resetting the terminal, etc., and transmitting information via the control LAN to the monitoring and control panel 13 which performs light control. The monitoring control panel 13 has a function of centrally managing various power line circuit information, and each power line circuit information shares information with a master station control panel 16 which controls one power supply circuit by a transmission LAN. ing. The terminal 19 monitors and controls lights and sensors.

The operation disk 12 shown in FIG. 2 has an operation unit 21 for performing data processing, an input / output port 22 for signals with lower systems, and a storage unit 23 for storing system information.
And a storage unit 24 for storing information from the monitoring control panel 13
And an input unit 25 composed of a screen touch keyboard input;
The display unit 26 is configured.

As shown in FIG. 3, the monitoring and control panel 13 has a signal input / output port 31 for the operation disk 12 and an operation section 32.
A signal input / output port 33 with the transmission master station, a storage unit 34 as an information sharing unit with the operation disk, and a storage unit 35 as an information sharing unit with the transmission master station 16.

As shown in FIG. 4, the signal transmission device 16 includes a signal input / output port 41 for the monitoring and control panel 13 and an operation unit 42.
A signal input / output port 43 with the terminal, a storage unit 44 as an information sharing unit with the monitoring control panel, and a storage unit 45 as an information storage unit of the terminal. The signal transmission device 16 has a signal input / output port 43 for performing communication with a terminal.
A power line carrier (transmitter / receiver) 46 is interposed in front of.

As shown in FIG.
It comprises a signal input / output port 51 with the sensor, an arithmetic section 52, a signal input / output port 53 with the signal transmission device 16, and a storage section 54 as a light / sensor information storage section. In the terminal 19, a power line carrier (transmitter / receiver) 55 is interposed in front of the signal input / output port 53.

On the screen of the operation disk 12, it is possible to monitor and operate the state of the entire airport, lights and sensors.

Next, an embodiment of the power transfer system and its communication system will be specifically described.

As shown in FIGS. 6 and 7, on the local side, a constant current generator (CCR) 61 is provided with a filter 62.
Are connected in parallel, and the signal transmission device 62 and the plurality of lighting devices 6
4 to the series circuit. Each lighting device 64 includes a rubber transformer 65, a terminal 66, and a lighting 67. The signal transmission device 63 has a waveform detector 63a, a signal extraction filter 63b, and a signal injection switch 63c. The terminal 66 of the lighting device 64 also has a waveform detector 66a, a signal extraction filter 66b, and a signal injection switch 66c similar to the signal transmission device 63.

The filter 62 is composed of a coil L, a capacitor C and a resistor R so as to cut off a specific frequency used in power line carrier as shown in FIG. The signal transmission device 63 is provided for exchanging information with the host system (the operation disk 12). The signal transmission device 63 has a power line directly on the primary side as shown in FIG. 6 or a rubber as shown in FIG. It is connected via a transformer 65.

Further, a carrier is used as a transmission means from the signal transmission device 63 to the terminal 66, and the transmission from the terminal 66 to the signal transmission device 63 is performed by switching the secondary side of the power supply on / off. Can be. Specifically, as shown in FIGS. 9 and 10, the configuration of the terminal 66 is the same as that of the embodiment of FIGS.
, A carrier transmission modem 63d is provided instead of the ON / OFF switch. That is, the signal transmission device 63 includes a waveform detector 63a, a filter 63b, and a modem 63d.

As shown in FIG. 11, a circuit for performing ON / OFF includes a transmitter 71 for transmitting a specific frequency, and switching elements 72 and 7 for turning ON / OFF the secondary side circuit.
3 and drive elements 74 and 75 for driving the switching elements by the signal of the signal transmitter 71.
A comparator 76 is connected to the secondary side circuit, and counts the power supply frequency. As shown in FIG. 12, the frequency is counted by the timer in the terminal 66 (20 ms in the 50 Hz area, 16 ms in the 60 Hz area).
7 ms) and the current (voltage) waveform flowing through the circuit. The power supply obtaining unit 77 uses a power supply for driving the terminal. The rubber transformer 65 is used for the secondary connection, but not used for the primary connection.

Further, when a voltage in the reverse direction is applied instead of turning on / off the secondary side, the switching circuit is configured as shown in FIG. That is, the switching element 72 is connected to the secondary windings of the transformers T1 and T2 via the diode bridge circuit 77.
The switching element 78 is connected to secondary windings of transformers T3 and T4 via a diode bridge circuit 79.

According to the switching circuit of FIG.
As seen from the side of the / OFF circuit (switching element), the transformers T1 and T3 are transformers for acquiring power, and the transformer T
2 and T3 are power supply output transformers. ON / O
The FF circuit uses different circuits on the positive side and the negative side of the power supply. When the power supply is on the positive side, the direction of the current acquired by the transformer T1 is changed by the diode bridge circuit 78 as shown in the ON / OFF circuit 101. And a negative current is applied to the secondary circuit by the transformer T2. Similarly, when the power supply voltage is on the negative side, the current obtained by the transformer T3 is inverted as in the ON / OFF circuit 102, and applied to the secondary side by the transformer T4. The positive and negative counts of the power supply are performed using the comparator 76 as shown in FIG. The rubber transformer 65 is used in the case of the secondary connection, but is not used in the case of the primary connection.

Further, when the load changes, the switching elements 72 and 73 are arranged in series in the ON / OFF switch circuit of FIG. 11, but in FIG. 14, the switching elements 72 and 73 are They are arranged in parallel.
As a result, the switching circuit includes the switching element 7
2 and 73 are configured to forcibly create a short circuit state. Also in this circuit, the rubber transformer 65 is used in the case of the secondary connection, but is not used in the case of the primary connection.

Next, the operation of the dip type monitoring and control system using the ON / OFF switching circuit having the above configuration will be described.

When communication is performed in the monitoring and control system using the ON / OFF switching circuit having the above configuration, the communication is performed by assigning a signal to a peak of each power supply waveform. For example, if the signal is defined as shown in FIG. 15, the format is as shown in FIG. In this example, a case is shown in which a signal is present both above and below two periods of the power supply frequency as a start signal indicating the start of a signal.

In this case, when there are signals above and below two cycles as shown in FIG. 17, it is defined as the start of communication even during communication. The following 3 to 6 cycles are defined as a command part, and 16 to 0 to 15 are defined using only the positive side of the frequency.
Defines what kind of communication is to be performed by the type of command. Similarly, in the identification flag of 7 cycles, only the positive side is used, and each terminal /
Define whether to communicate with a specific group or with the entire terminal.

When performing communication with individual terminals / specific groups, it is assumed that there is an identification flag signal, and the period and the meaning of the signal are as shown in FIGS. 18, 19 and 20, for example. In the case of single-sided communication from the signal transmission device to the terminal, the terminal /
When the number of the specific group is 255 terminals at the maximum, the positive side of 16 waves of 8 to 23 cycles of the power supply frequency is defined as a part for specifying the terminal / group number, and the target number is specified in a 2-bit expression. If the control answer requires only affirmative / negative, the terminal makes an answer in the 24th cycle of the power supply frequency as shown in FIG.

On the other hand, in the case of monitoring all terminals, as shown in FIG. 21, the signal of the identification flag is not provided, and when there are 255 terminals at the maximum, each one of the power supply frequencies 8 to 257 is assigned to the answer of normal / abnormal.

According to the flowchart of FIG.
At the start of the process (1), processes such as detection of center disconnection under the lamp and ON / OFF control are performed. Next, a power supply waveform is acquired, and it is determined whether or not after zero crossing is a positive side. If this determination is YES, a signal is injected on the positive side. After the signal injection, it is determined whether or not after zero crossing is on the negative side. If this determination is YES, a signal is injected on the negative side. Thereafter, the process returns to the process (1). FIG. 22B shows each part of the power supply waveform.

In the above processing, when a signal is injected into a specific waveform portion in the signal injection processing to the positive side and the signal injection processing to the negative side, the processing (2) of FIG. 22B is executed. In this process (2), a process of avoiding the waveform distortion part is performed, and the counter after the zero cross is started. Thereafter, the end of the counter up is determined, and if YES, a signal is injected and the process ends. If the count-up has not been completed, the process returns to the process (2).

The signal generation method is as follows. When a command such as disconnection detection or lamp ON / OFF control is transmitted to the signal transmission device from the host as in terminal processing (1) in FIG. Start acquisition of waveform. When the signal is injected into the positive side waveform, the power supply waveform is on the positive side after the zero crossing, and when the signal is injected on the negative side waveform, the power supply waveform is on the negative side after the zero crossing. is there. The power supply waveform is not a perfect sine wave as shown in FIG. 22, but comprises a waveform distortion part and a sine wave part. Therefore, when injecting the signal into either the waveform distortion section or the sine wave section, the time is measured by the counter of the arithmetic section of the signal transmission device as in processing (2), and the signal is injected into the sine wave section. Adjust to
When injecting into the waveform distortion part, the counter value becomes 0.

On the other hand, the processing on the terminal side waits for a start signal as shown in FIG. 24, and acquires information in order from the time when the start signal comes.

Further, when a carrier is used from the signal transmission apparatus to the terminal, as shown in FIG.
The information transmitted as one bit per bit by the F switch is transmitted as text data.

[0039]

According to the monitoring control system of the present invention as described above, the status of the lamp / sensor can be known from the operation disk installed in the central monitoring room without actually going to the site. . In addition, lighting control can be performed collectively. In addition, automatic management of airports is possible by centrally managing.

Further, a system can be constructed simply and inexpensively by injecting information into a power line without installing a signal line.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an airport control system to which the present invention is applied.

FIG. 2 is a configuration diagram of an operation disk.

FIG. 3 is a configuration diagram of a monitoring control panel.

FIG. 4 is a configuration diagram of a signal transmission device as a master station.

FIG. 5 is a configuration diagram of a terminal as a slave station.

FIG. 6 is a configuration diagram of a monitoring control system using a dip method according to an embodiment of the present invention.

FIG. 7 is a configuration diagram of a supervisory control system using a dip method according to another embodiment of the present invention.

FIG. 8 is a configuration diagram of a filter unit.

FIG. 9 is a configuration diagram of a supervisory control system using a dip method according to another embodiment of the present invention.

FIG. 10 is a configuration diagram of a supervisory control system using a dip method according to another embodiment of the present invention.

FIG. 11 is an ON / OFF switching circuit configuration diagram.

FIG. 12 is a diagram showing a power supply frequency and a count generated by a CCR.

FIG. 13 is an ON / OFF switching circuit configuration diagram for applying a reverse voltage.

FIG. 14 is a configuration diagram of a load change circuit used as a switching circuit.

FIG. 15 is a diagram showing signal periods and their meanings.

FIG. 16 is a waveform format defined in FIG. 15;

FIG. 17 is a flowchart of a start signal receiving process of the terminal.

FIG. 18 is a data configuration diagram.

FIG. 19 is another data configuration diagram.

FIG. 20 is another data configuration diagram.

FIG. 21 is another data configuration diagram.

FIG. 22 is a signal processing flowchart of the signal transmission device.

FIG. 23 is a signal processing flowchart of a terminal.

FIG. 24 is a data configuration diagram at the time of carrier wave transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Central monitoring room 12 ... Operation disk 13 ... Monitoring control panel 15 ... Electric room 16 ... Signal transmission device 17 ... CCR 61 ... CCR 62 ... Filter 63 ... Signal transmission device 64 ... Lighting device 65 ... Rubber transformer 66 ... Terminal 67 ... Light 71 ... Signal generator 72, 73 ... Switching element 74,75 ... Drive element 76 ... Comparator 77 ... Power acquisition unit 78, 79 ... Diode bridge circuit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kiyoshi Noda 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu factory, Toshiba Corporation 5H180 AA26 BB17 JJ25 5K046 AA03 BA02 BB06 CC16 PP01 PS02 PS03 PS15 PS42 YY01

Claims (7)

[Claims] 1. A secondary side of a power supply is turned on according to a specific cycle.
Means for changing the power supply waveform by turning off / off, a signal transmission device for supplying power having the power supply waveform to the power line using the change in the power supply waveform, and a power supply waveform from the signal transmission device, And a terminal having means for performing communication control, wherein the power line carrier network is applied to traffic control monitoring, and a monitoring control system using a dip method. 2. The surveillance control system using a dip method according to claim 1, wherein the terminal and the signal transmission device include both a transmission unit and a reception unit, and enable two-way communication. 3. The dip method according to claim 1, wherein each of the terminal and the signal transmission device has a detection circuit that allocates each cycle of a power supply frequency to each and synchronizes signals. Monitoring and control system. 4. The surveillance control system using a dip method according to claim 1, wherein the terminal and the signal transmission device use a means for generating reverse power as signal transmission means. 5. The monitoring and control system using a dip method according to claim 1, wherein said terminal and said signal transmission device use a means for causing a load change as signal transmission means. 6. The dip method according to claim 1, wherein the signal transmission device directly turns off the power supply on the primary side by 0 N / OFF and directly monitors the power supply waveform to be monitored on the primary side. Monitoring and control system. 7. The terminal and the signal transmission device use a carrier wave as a transmission method from the signal transmission device to the terminal, and turn on a secondary side of a power supply in a transmission method from the terminal to the signal transmission device. 2. A supervisory control system using a dip method according to claim 1, wherein a / OFF switch is performed.