JP3548045B2 - Monitoring and control system using dip method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power line carrier system and a communication system thereof, and more particularly to a power line carrier system for centrally monitoring and controlling the countless lights and sensors installed on a runway, a taxiway, etc. in an airport facility, and a communication system thereof. About the method.
[0002]
[Prior art]
Conventionally, when the lamp is disconnected, the secondary side of the rubber transformer to which the lamp is connected is released to cause a magnetic saturation phenomenon. 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 more than when the core breakage does not occur. While the rising of the output current is delayed (saturation time α), the waveform suddenly rises. This condition was being monitored.
[0003]
[Problems to be solved by the invention]
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 acquire a signal because the swelling method is not constant. The reason was that the magnetic saturation time of the rubber transformer was not constant, so it was obtained by the difference in area due to time integration with the normal time, but the waveform itself at the normal time was not stable, Was low.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a dip-type monitoring control system that turns on / off a power supply to change a power supply waveform, and uses the signal as a signal to perform traffic control monitoring at an airport or the like.
[0005]
[Means for Solving the Problems]
The present invention provides means for changing a power supply waveform by turning on / off a secondary side of a power supply in accordance with a specific cycle, and a signal transmission for using the change in the power supply waveform as a signal to supply power having the power supply waveform to a power line. Provided is a monitoring control system using a dip method, including a device 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.
[0006]
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. Is used as a signal, 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 the change in the component. In this case, each half-wave of the power supply frequency is used as one information unit, and a signal of a pattern determined on the transmission side is put on the power supply waveform, thereby enabling the monitoring control of the lamp.
[0007]
The present invention provides a dip-type monitoring and 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.
[0008]
The present invention provides a dip-type monitoring and control system having a detection circuit in which both the terminal and the signal transmission device allocate each cycle of a power supply frequency to each and synchronize signals.
[0009]
The present invention provides a dip-type monitoring and control system in which the terminal and the signal transmission device use a means for generating reverse power as signal transmission means.
[0010]
The present invention provides a dip-type monitoring control system in which the terminal and the signal transmission device use a means for causing a load change as signal transmission means.
[0011]
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 also monitors the power supply waveform to be monitored directly on the primary side.
[0012]
According to the present invention, 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 / off a secondary side of a power supply in a transmission method from the terminal to the signal transmission device. Provided is a dip-type monitoring control system that switches off.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of an apparatus according to the present invention will be described with reference to the drawings.
[0014]
According to the system configuration shown in FIG. 1, an operation console, that is, an operation disk 12 and a monitoring control panel 13 are installed in a central monitoring room 11 of an 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 supplies power from a constant current generator (CCR) 17 to a 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.
[0015]
In the system configuration as described above, for information collection at the center, the master station control panel 16 can acquire the lamp information from the terminal 19 installed on the lamp and can download it to the upper 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 the individual power line circuit information shares information with the master station control panel 16 which controls one power supply circuit via the transmission LAN. ing. The terminal 19 performs monitoring control of lights and sensors.
[0016]
The operation disk 12 shown in FIG. 2 includes an arithmetic unit 21 for performing data processing, an input / output port 22 for signals with lower systems, a storage unit 23 for storing system information, and information from the monitoring control panel 13. , An input unit 25 configured to perform screen touch and keyboard input, and a display unit 26.
[0017]
As shown in FIG. 3, the monitoring and control panel 13 serves as a signal input / output port 31 for the operation disk 12, an arithmetic unit 32, a signal input / output port 33 for the transmission master station, and an information sharing unit for the operation disk. And a storage unit 35 as an information sharing unit with the transmission master station 16.
[0018]
As shown in FIG. 4, the signal transmission device 16 serves as a signal input / output port 41 with the monitoring control panel 13, an arithmetic unit 42, a signal input / output port 43 with a terminal, and an information sharing unit with the monitoring control panel. And a storage unit 45 as an information storage unit of the terminal. Further, in the signal transmission device 16, a power line carrier (transmission device / reception device) 46 is interposed in front of the signal input / output port 43 in order to perform communication with a terminal.
[0019]
As shown in FIG. 5, the terminal 19 includes a signal input / output port 51 for a light / sensor, an arithmetic unit 52, a signal input / output port 53 for the signal transmission device 16, and a light / sensor information storage unit. The storage unit 54 is used. The terminal 19 has a power line carrier (transmitter / receiver) 55 interposed in front of the signal input / output port 53.
[0020]
On the screen of the operation disk 12, it is possible to monitor and operate the entire airport and the status of lights and sensors.
[0021]
Next, an embodiment of a power transfer system and a communication system thereof will be specifically described.
[0022]
In local side as shown in FIGS. 6 and 7, the filter 62 to a constant current generator (CCR) 61 are connected in parallel, to power the series circuit of the signal transmission device 6 3 and a plurality of lighting devices 64. 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.
[0023]
As shown in FIG. 8, the filter 62 includes a coil L, a capacitor C, and a resistor R so as to cut off a specific frequency used in power line transfer. The signal transmission device 63 is provided for exchanging information with the host system (the operation disk 12), and the power line is provided directly on the primary side as shown in FIG. 6 or as shown in FIG. It is connected via a transformer 65.
[0024]
In addition, a method can be employed in which a carrier is used as a transmission means from the signal transmission device 63 to the terminal 66, and transmission from the terminal 66 to the signal transmission device 63 is performed by turning on / off the secondary side of the power supply. Specifically, as shown in FIGS. 9 and 10, the configuration of the terminal 66 is the same as that of the embodiment of FIGS. 6 and 7, but a carrier transmission modem 63 d is provided in the signal transmission device 63 instead of the ON / OFF switch. Provided. That is, the signal transmission device 63 includes a waveform detector 63a, a filter 63b, and a modem 63d.
[0025]
As shown in FIG. 11, a circuit for performing ON / OFF includes a transmitter 71 for transmitting a specific frequency, switching elements 72 and 73 for turning on / off a secondary-side circuit, and a signal from the signal transmitter 71. Drive elements 74 and 75 for driving switching elements. Further, 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 (20 ms in the 50 Hz area, 16.7 ms in the 60 Hz area) in the terminal 66 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 in the case of the secondary connection, but is not used in the case of the primary connection.
[0026]
Further, when a voltage in the reverse direction is applied instead of ON / OFF switching the secondary side, the switching circuit is configured as shown in FIG. That is, the switching element 72 is connected to the secondary winding of the transformer T1, T2 via the diode bridge circuit 7 8, similarly, the secondary winding of the transformer T3, T4 via the switching element 7 3 diode bridge circuit 79 Connected to the wire.
[0027]
According to the switching circuit of FIG. 13, the transformers T1 and T3 are power acquisition transformers, and the transformers T2 and T3 are power supply output transformers when viewed from the ON / OFF circuit (switching element) side. The ON / OFF 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 obtained by the transformer T1 is changed by a diode bridge as shown in the ON / OFF circuit 101. The current is reversed by the circuit 78 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.
[0028]
Further, when a load change is performed, 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 arranged in parallel. Is done. Thus, the switching circuit is configured such that the switching elements 72 and 73 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.
[0029]
Next, the operation of the dip-type monitoring control system using the ON / OFF switching circuit having the above configuration will be described.
[0030]
When communication is performed by the monitoring control system using the ON / OFF switching circuit having the above configuration, the communication is performed by assigning a signal to each peak of the 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.
[0031]
In this case, as shown in FIG. 17, when there are signals above and below two cycles, it is defined as the start of communication even during communication. The following 3 to 6 cycles are defined as a command portion, and what communication is performed by 16 types of commands from 0 to 15 using only the positive side of the frequency is defined. Similarly, the seven-cycle identification flag uses only the positive side and defines whether communication is performed with an individual terminal / specific group or with the entire terminal.
[0032]
When performing communication with individual terminals / specific groups, it is assumed that there is a signal of the identification flag, 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, when there are a maximum of 255 terminals / specific group numbers, 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. , 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.
[0033]
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 a maximum of 255 terminals, one wave each of the power supply frequency of 8 to 257 is assigned to the answer of normal / abnormal.
[0034]
According to the flowchart of FIG. 22A, at the start of the process (1), processes such as under-light centerline detection and ON / OFF control are performed. Next, a power supply waveform is obtained, and it is determined whether or not the zero cross 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.
[0035]
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 portion is performed, and the post-zero-cross counter is started. Thereafter, the end of the counter up is determined, and if YES, signal injection is performed and the process ends. If the count-up has not been completed, the process returns to the process (2).
[0036]
The signal generation method is as follows. When a command such as disconnection detection or lighting ON / OFF control is transmitted from an upper level to the signal transmission device as in the terminal processing (1) in FIG. 23, the signal transmission device acquires a power supply waveform. To start. When the signal is injected into the positive side waveform, the power supply waveform is on the positive side after the zero cross, and when the signal is injected on the negative side waveform, the power supply waveform is on the negative side after the zero cross. is there. The power supply waveform is not a complete sine wave as shown in FIG. 22, but comprises a waveform distortion part and a sine wave part. For this reason, 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.
[0037]
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.
[0038]
Further, when a carrier is used from the signal transmission device to the terminal, information transmitted as one bit per mountain by the ON / OFF switch of the circuit is transmitted as text data as shown in FIG.
[0039]
【The invention's effect】
According to the monitoring control system of the present invention as described above, it is possible to know the state of the lamp / sensor 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.
[0040]
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 supervisory 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 the terminal.
FIG. 24 is a data configuration diagram at the time of carrier wave transmission.
[Explanation 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 generators 72 and 73 ... Switching devices 74 and 75 ... Drive device 76 ... Comparator 77 ... Power source acquisition units 78 and 79 ... Diode bridge circuit

Claims (4)

In a supervisory control system using a dip method, which applies a power line carrier network to traffic control monitoring,
A power supply waveform varying means for changing a power supply waveform by turning on / off an output side of a power supply in accordance with a specific cycle; and a signal transmission device which uses the change in the power supply waveform as a signal and supplies power having the power supply waveform to a power line. A terminal having means for analyzing a power supply waveform from the signal transmission device and performing communication control, wherein the power supply waveform changing means includes a power supply acquisition transformer and a power supply output connected to the output side of the power supply. A transformer and inverting means for inverting the direction of the current acquired on the secondary side of the power acquisition transformer in accordance with the specific cycle, and generating an inversion current on the output side of the power supply by the power output transformer. A supervisory control system characterized by being constituted. The monitoring control system 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. Both the terminal and the signal transmission device, the monitoring control system according to claim 1, wherein a synchronization detection circuit of the allocation signal of each cycle of the power frequency, respectively. 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 switch ON / OFF an output side of a power supply in a transmission method from the terminal to the signal transmission device. The supervisory control system according to claim 1, wherein:

Images