KR101891877B1 - Power control communication device using current and voltage change in power line - Google Patents
Power control communication device using current and voltage change in power line Download PDFInfo
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- KR101891877B1 KR101891877B1 KR1020160030005A KR20160030005A KR101891877B1 KR 101891877 B1 KR101891877 B1 KR 101891877B1 KR 1020160030005 A KR1020160030005 A KR 1020160030005A KR 20160030005 A KR20160030005 A KR 20160030005A KR 101891877 B1 KR101891877 B1 KR 101891877B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5412—Methods of transmitting or receiving signals via power distribution lines by modofying wave form of the power source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
Abstract
The present invention discloses a power supply control communication apparatus that uses a power supply variation of a power line as a communication signal. Such a communication device includes a first communication device for generating a current signal for changing a current level of an AC power source and monitoring a voltage level of the AC power source to detect a voltage signal, And a second communication device for generating a voltage signal and monitoring a current level of the AC power supply. On the other hand, the power line communication modem uses the ground (ground or ground) as a part of the communication line. Power line communication modem uses DC power as communication signal. The DC power is generated by rectifying the AC power. In the indoor power line communication, the first line and the indoor ground line of the power lines are used as the communication line. In the case of the outdoor power line communication, the first line and the ground of the power lines are used as the communication line. .
Description
BACKGROUND OF THE
Generally, control target devices such as a light control device for controlling a lamp, a street lamp control device for controlling a street lamp installed on a road, an industrial control device for controlling a motor, or an automatic fire detection device for suppressing a fire in a building And can be controlled by receiving a communication signal. Also, a telecommunication network or an internet communication network that meters meters can be used to transmit or receive communication signals.
As a communication method for appropriately controlling such a control target device, there is known a wired communication control method through a separate communication line, a wireless communication control method for communication through a wireless modem, and a communication method using a power line.
The current of the commercial power supply is the 60Hz frequency band, and the voltage is 110V ~ 220V. Power line communication enables high-speed communication by transmitting communication signals in a frequency band other than 60 Hz, that is, a frequency band of 1 to 30 MHz. The communication signal on the power line is separated from the power and communication signal through the router installed in the vicinity of the transformer and the modem installed in the house, so that the end user can use the communication service on the power line.
As described above, the communication system using the power line has a merit that it is not necessary to construct a separate communication line by carrying a high frequency communication signal to the power line, but there is a problem that communication error due to noise occurs, There is a disadvantage that it is necessary.
Even when a control target group is turned on / off using a power line communication system or a relatively simple control such as illumination control is performed, a communication modem must be installed, which makes it difficult to realize a low-cost communication. All spaces and materials except power lines are treated as grounding (resistance). Since the data is radiated to the public and the earth, the data received at the receiving end can be lost or distorted. As a result, a transmission / reception error due to noise generated by various electric / electronic elements is generated. In the case of the conventional power line communication, since the communication success rate is low due to the transmission / reception error, commercialization is difficult in practice.
As a result, there is a need for a communication technology for controlling a control target station with a high communication success rate through a relatively simple and inexpensive communication modem without installing a separate wired communication line that has a large installation cost. In addition, when the Internet communication is performed through such a communication technology, utilization in various fields becomes high.
For example, in the case where the control target device is a streetlight control device, in order to prevent waste of power unnecessarily consumed, only when the vehicle passes the road or when the person passes the distance, the illumination is maintained as necessary, It is necessary to keep the minimum illuminance when the person does not pass the distance or the person does not pass the distance. In addition, when there is no Internet communication line, it is also necessary to implement Internet communication using a power line installed before the wired communication line is installed separately.
SUMMARY OF THE INVENTION The present invention provides a communication method and a power control communication apparatus using a power supply variation of a power line as a communication signal.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a power control communication device and a communication method capable of using a pre-installed power line as a communication line without installing a separate wired communication line.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a power control communication apparatus and a communication method that utilize variation detection of a signal amplitude of a voltage and a current provided through a power line.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a power line communication modem capable of performing power line communication through one of a ground ground line and power lines and a power line communication device having the power line communication modem.
According to an aspect of the present invention, there is provided a power control communication apparatus using a power fluctuation of a power line as a communication signal,
A first communication device connected to a power line supplying AC power and generating a current signal for varying a current level of the AC power during a first communication signal transmission time and monitoring a voltage level of the AC power to detect a voltage signal; And
Generating the voltage signal that is connected to the first communication device through the power line and causes the voltage level of the AC power source to fluctuate during the second communication signal transmission time and monitors the current level of the AC power source to detect the current signal And a second communication device.
According to another aspect of the present invention, there is provided a power control communication apparatus using a power fluctuation of a power line as a communication signal,
A control unit connected to a power line supplying AC power and generating a current signal for varying a current level of the AC power during a first communication signal transmission time and monitoring a voltage level of the AC power, A first communication device for controlling the target device; And
Generating a voltage signal that is connected to the first communication device through the power line and causes a voltage level of the AC power source to fluctuate during a second communication signal transmission time when a control event is generated and monitors a current level of the AC power source, And a second communication device for detecting the current signal as a control response signal.
According to another aspect of the present invention, there is provided a power control communication apparatus using a power fluctuation of a power line as a communication signal,
A control unit connected to a power line supplying AC power and monitoring the voltage level of the AC power supply to control the control target unit when the voltage signal is detected as a communication signal and to change the current level of the AC power supply during the first communication signal transmission time A plurality of first communication devices for generating a current signal; And
Generates a voltage signal that is connected to the first communication devices through the power line and causes a voltage level of the AC power source to fluctuate during a second communication signal transmission time when a control event occurs, and monitors a current level of the AC power source And a second communication device for receiving the current signal as a control response signal.
According to another aspect of the present invention, there is provided a power control communication apparatus using a power fluctuation of a power line as a communication signal,
An input unit for receiving a sensing input or an operation input and generating a control event;
A current signal is generated as a slave communication signal which is connected to a power line to which an AC power is supplied and which causes the signal amplitude of the AC current to fluctuate for a predetermined time, monitors the signal amplitude of the AC voltage for a predetermined time, A first communication device for controlling the control target device in the first communication device; And
Generating the voltage signal, which is connected to the first communication device via the power line and causes the amplitude of the AC voltage to fluctuate when the control event occurs, as the master communication signal and monitors the signal amplitude of the AC current, And a second communication device for detecting the signal as a response signal.
According to another aspect of the present invention, there is provided a power line communication modem including:
A transforming and rectifying unit connected to the power lines for supplying the AC power and transforming and rectifying the AC voltage according to the winding ratio; And
And a control unit for receiving a modulated communication signal between a first one of the power lines and a ground ground line for the power lines to transmit the modulated communication signal to a destination or a modem ground connected to the first line and the ground ground line, And a transmission / reception unit for demodulating the incom- ing-modulated communication signal received via the communication unit.
According to the embodiments of the present invention, it is possible to control the control target group by using the power source variation of the power line as a communication signal. In addition, since power line communication is performed through one of the ground ground line and the power lines, various types of communication including internet communication can be performed. Therefore, compared to the conventional power line communication method, the communication success rate is improved and the communication implementation cost is relatively lowered.
1 is a schematic block diagram of a power control communication device according to an embodiment of the present invention.
FIG. 2 is a specific block diagram of the first communication apparatus of FIG. 1; FIG.
FIG. 3 is a specific block diagram of the second communication device of FIG. 1. FIG.
4 is a diagram illustrating an exemplary principle for detecting a current signal as a communication signal by current level monitoring according to FIG.
FIG. 5 is a diagram illustrating a control example of the power control communication method using the amplitude variation of the power supply level according to FIG.
FIG. 6 is a diagram for explaining another control example of the power control communication method using the amplitude variation of the power supply level according to FIG.
FIG. 7 is a diagram illustrating an exemplary format of a communication signal according to FIG.
8 is a flowchart of operation control according to Fig.
FIG. 9 is another operation control flowchart according to FIG. 2. FIG.
10 is an operation control flowchart according to Fig.
11 is a flow chart of operation control of the synchronous communication system according to FIG.
FIG. 12 is an exemplary block diagram of an illuminance control actuator for lighting or the like which is applied to the present invention.
FIG. 13 is a detailed embodiment of FIG. 12.
14 is a block diagram of a voltage master device of a power control communication device according to another embodiment of the present invention.
15 is a block diagram of a current master device of a power control communication device according to another embodiment of the present invention.
FIG. 16 is a diagram illustrating a control example of the power control communication method according to FIGS. 14 and 15. FIG.
FIG. 17 is a diagram illustrating a monitoring example of the voltage signal and the current signal of FIG. 16; FIG.
FIG. 18 is a diagram illustrating a detailed implementation of the illuminance control circuit of the illuminance control driver of FIG. 12;
Fig. 19 is a diagram showing another detailed embodiment of the illuminated control actuator of Fig. 12; Fig.
20 is an operation timing chart showing an example of a four-step power saving operation according to FIG.
FIG. 21 is an operation timing chart showing an example of the four-step normal operation according to FIG.
22 is an illustration of an implementation of a powerline communication device including a grounded connection powerline communication modem in accordance with another embodiment of the present invention.
FIG. 23 is a diagram illustrating a specific circuit configuration of the first communication modem in FIG. 22; FIG.
24 is a signal waveform diagram showing an example of DC data appearing through the power line communication apparatus of FIG.
Fig. 25 is a real signal waveform diagram that is shown by testing the power line communication apparatus of Fig. 22; Fig.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more apparent from the following description of preferred embodiments with reference to the attached drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art, without intention other than to provide an understanding of the present invention.
In this specification, when it is mentioned that some element or lines are connected to a target element block, it also includes a direct connection as well as a meaning indirectly connected to the target element block via some other element.
In addition, the same or similar reference numerals shown in the drawings denote the same or similar components as possible. In some drawings, the connection relationship of elements and lines is shown for an effective explanation of the technical contents, and other elements or circuit blocks may be further provided.
1 is a schematic block diagram of a power control communication device according to an embodiment of the present invention.
Referring to FIG. 1, the power control communication device may include a
The
The
The
The
The
The power line PL is usually two lines, and when one line is N-phase, the other line may be one of R, S, and T phases. The voltage level of the power line PL may be, for example, 220 volts as an effective value. However, an example of the voltage level is only an embodiment of the present invention and may be given a voltage of 220 volts or less or a voltage of 220 volts or more.
The
The
The power control communication apparatus of Fig. 1 uses a power supply variation of the power line as a communication signal, so that a communication modem used for conventional power line communication is not required. In addition, since it is not a high-frequency communication, the occurrence of communication errors due to noise is minimized or reduced.
FIG. 2 is a specific block diagram of the first communication apparatus of FIG. 1; FIG.
Referring to FIG. 2, the
The current change driver 140 generates a switching drive signal in response to a voltage signal applied through a power line when the voltage signal is detected as a master communication signal.
The
The load resistance L functions as a setting resistor that is connected to the
The
The zero
The voltage
The
The
In the
2, the
The
On the other hand, the temperature generated in the vehicle can be detected at the time of installation of the heat sensor. It can be judged that there is an entry of the vehicle at the time of temperature sensing. In addition, an infra-red beam switch can be installed to detect vehicle entry or vehicle entry loop coils to detect vehicle entry. In the embodiment of the present invention, the illumination lamp may be a lamp installed in a street or street, a security lamp, or a lamp installed in a parking lot such as an apartment or an LED.
The
The line voltage drop
In addition, the
FIG. 3 is a specific block diagram of the second communication device of FIG. 1. FIG.
3, the
The
The
The
The depressurization resistor L2 functions as a setting resistor which is connected in series to the power line (PL: 2) when the switching unit is operated so that the master communication signal is generated. The pressure reducing resistor L2 may be implemented as a hot wire heater core having a resistance of several tens of ohms or several ohms. Here, the resistance value of the hot wire heater core may be determined according to the parallel combined resistance value of the load such as the lamps connected in parallel to the power line, and the level of the power fluctuation used as the communication signal. That is, given the parallel combined resistance value and the level of power supply fluctuation, the resistance value of the pressure reducing resistor L2 is set by applying the Kirchhoff's law.
The line current
The zero
The
3, the
The
4 is a diagram illustrating an exemplary principle for detecting a current signal as a communication signal by current level monitoring according to FIG.
Referring to FIG. 4, the horizontal axis indicates time and the vertical axis indicates the amplitude of the current signal. The current signal appearing on the power line in waveform F1 is a sinusoidal signal having a positive amplitude A1 and a negative amplitude B1 during one period.
The line current
Waveform F3 shows a signal including a current signal as a communication signal. That is, the second and third half wave signals indicate the amplified current signal. The maximum amplitude of the amplified current signal is D1 higher than the maximum amplitude of the current signal, not the communication signal. That is, when the amplitude of the current signal is high during the half period, it is detected as a communication signal.
The
In the case of FIG. 4, the amplified current signal is exemplified as the communication signal, but in the case of the reduced voltage signal, the second and third half-wave signals in the waveform F3 of FIG. 4 will be provided as the reduced voltage signal. The maximum amplitude of the decompressed voltage signal is lower by D1 than the maximum amplitude of the voltage signal, not the communication signal. That is, when the amplitude of the voltage signal is low for half a period, it is detected as a master communication signal.
In this manner, the amplitude of the current signal or the voltage signal can be varied during one week or half period of the AC power source to perform communication through the power line without a communication modem.
FIG. 5 is a diagram illustrating a control example of the power control communication method using the amplitude variation of the power supply level according to FIG.
Referring to FIG. 5, when the first voltage signal IN1 applied during the half period of the AC power supply is lower than the first reference voltage signal VREF1 and higher than the second reference voltage signal VREF2, the communication signal becomes "1" . Here, the level of the first reference voltage signal VREF1 is higher than the level of the second reference voltage signal VREF2.
The communication signal is also "1" when the second voltage signal IN2 applied during another half period of the AC power supply is lower than the first reference voltage signal VREF1 and higher than the second reference voltage signal VREF2. Here, the level of the first reference voltage signal VREF1 is higher than the level of the second reference voltage signal VREF2. Therefore, when the voltage signal of "11" is given as the communication signal during one week, it may mean that the motor is driven when the control target group is a motor. It may also mean an instruction to control the dimming control to 100% when the control target group is an illumination lamp.
On the other hand, when the first voltage signal IN1 applied during the half period of the AC power supply is lower than the first reference voltage signal VREF1 and higher than the second reference voltage signal VREF2, the communication signal becomes "1". Here, the level of the first reference voltage signal VREF1 is higher than the level of the second reference voltage signal VREF2. The communication signal becomes "0" when the second voltage signal IN2 applied during another half period of the AC power supply is equal to the first reference voltage signal VREF1. Quot; 10 "signal is given as a communication signal during one week, it may mean that the motor is driven when the control target group is a motor. It can also mean a command to control the dimming control to 75% when the control target group is an illumination lamp.
Further, when the voltage signal of "01" is given as the communication signal during one week, it may mean motor driving off when the control target group is a motor. It may also mean a command to control the dimming control to 50% when the control target group is an illumination lamp.
On the other hand, in the case of the current signal,
The communication signal becomes "1" when the first current signal IN10 applied during the half period of the AC power supply is higher than the first reference current signal CREF1 and lower than the second reference current signal CREF2. Here, the level of the first reference current signal CREF1 is lower than the level of the second reference current signal CREF2.
The communication signal becomes "1" when the second current signal IN11 applied during another half period of the AC power supply is higher than the first reference current signal CREF1 and lower than the second reference current signal CREF2. Here, the level of the first reference current signal CREF1 is lower than the level of the second reference current signal CREF2. Therefore, when a current signal of "11" is given as a communication signal during one week, it can be a response signal indicating that the motor drive-on or 100% dimming has been completed.
On the other hand, when the first current signal IN10 applied during the half period of the AC power supply is higher than the first reference current signal CREF1 and lower than the second reference current signal CREF2, the communication signal becomes "1". Here, the level of the first reference current signal CREF1 is lower than the level of the second reference current signal CREF2.
The communication signal becomes "0" when the second current signal IN11 applied during another half period of the AC power supply is the same as the first reference current signal CREF1. Therefore, when a current signal of "10" is given as a communication signal during one week, it may be a response signal indicating that the motor drive-on or 75% dimming has been completed.
Also, when a current signal of "01" is given as a communication signal during one week, it may be a response signal indicating that the motor drive OFF or 50% dimming has been completed.
FIG. 6 is a diagram for explaining another control example of the power control communication method using the amplitude variation of the power supply level according to FIG.
Referring to FIG. 6, the horizontal axis indicates time and the vertical axis indicates the amplitude of the current signal.
Waveform W1 in FIG. 6 represents a reference current signal, that is, a current signal that is not a communication signal.
Waveforms W2 to W4 indicate current signals as communication signals.
In the waveforms W1-W4, the interval T1 may include a synchronization signal, T2 may be an ID indicating a unique identification number, and the interval T3 may include a signal indicating data indicating the type of control command.
Therefore, when a current signal such as the waveform W4 is input, the synchronous signal is detected as "1111" through the
6, the current signal is expressed, but in the case of the voltage signal, the communication signal may appear as the reduced voltage signal, unlike in FIG.
FIG. 7 is a diagram illustrating an exemplary format of a communication signal according to FIG.
As a result, communication between the devices can be performed by synchronously transmitting the voltage signal via the power line and synchronously receiving the current signal through the power line.
8 is a flowchart of operation control according to Fig.
The initialization operation (step S1010) of the
And receives a voltage signal through the
In step S1030, the voltage signal received after storing the reference value is calculated as a data value and compared with a reference value. As a result, the
In step S1040, whether or not the voltage signal is a communication signal is checked. It is possible to determine whether the half period of the voltage waveform is a communication signal by sampling the voltage signal at least 50 times per 1/8 period of the half period of the voltage waveform during monitoring and comparing the value taken as the RMS value with a unit reference value .
The control target period is controlled in accordance with the state value detected in step S1050.
In step S1060, it is checked whether the set time has elapsed. If the set time has elapsed, an operation of generating a current signal as a response signal in step S1070 and transmitting the generated current signal through the power line is executed. In this case, the amplified current signal is transmitted through the power line. For example, if the load resistance L acts as a load on the power line for 32 ms, the amplified current signal is transmitted during the first communication signal transmission time.
FIG. 9 is another operation control flowchart according to FIG. 2. FIG.
In case of receiving the sensing signal through the
After the initialization in step S1110, if a sensing signal is received in step S1120, a current signal is generated during the transmission set time in step S1130 and the current signal is transmitted as a communication signal through the power line. For example, when the load resistance L is connected to the power line as a load for 32 ms, the amplified current signal is transmitted during the first communication signal transmission time.
In step S1140, it is checked whether a predetermined time has elapsed. If a predetermined time has elapsed, the voltage signal received in step S1150 is calculated as a data value and then compared with a reference value. For example, when the voltage signal is sampled 50 times or more every 1/8 period of the half period of the voltage waveform at the time of comparison, the RMS value is compared with a unit reference value to determine whether the half period of the voltage waveform is a communication signal It can be judged.
When the voltage signal is detected as a communication signal in step S1160, an operation of controlling the control target group is performed according to the state value detected in step S1170.
10 is an operation control flowchart according to Fig.
The flow of Fig. 10 is performed by the execution of the operation of the
After initialization in step S2010, the
After the elapse of the set time in step S2050, an operation of receiving the current signal through the power line for the second time is performed in step S2060. If it is checked as a communication signal by monitoring the current signal and it is determined as a response signal, it is determined that the normal communication is performed in step S2070. Thereafter, the operation of performing system maintenance and monitoring is continued.
11 is a flow chart of operation control of the synchronous communication system according to FIG.
FIG. 11 shows an example of performing a communication operation in the case of a communication format having a synchronization signal, an ID, and data as described with reference to FIG. 6 and FIG.
11, the
In step S3040, the
In step S3050, the
FIG. 12 is an exemplary block diagram of an illuminance control actuator for lighting or the like which is applied to the present invention. FIG. 13 is a detailed embodiment of FIG. 12. FIG.
12, the illumination lamp control driver includes an illumination lamp current
The illumination lamp current
The
When the
Therefore, the illumination lamp driving
The illumination lamp driving
The relays RY1 to RY5 function as a control switch for driving the illumination lamp and for saving power in a stepwise manner. The core resistor CR is made of a coil or a capacitor made of copper and is connected between the line L6 and the line L8 to function as a setting resistor for increasing the impedance at the time of driving the minimum illuminance.
The illumination lamp
The
The illumination current
Each of the slave devices, that is, the
For convenience of explanation, the operation of controlling the illuminance of the illumination lamp in response to the reduced voltage signal in one
12, the
When the
On the other hand, if it is assumed in FIG. 13 that the brightness is controlled to 80%, 60%, 40%, and 20% in order to perform the power saving operation in stages, the activation signals 00, 01, 10, and 11 may be applied as the driving control signals have. That is, when the
Now, when the
Now, when the
Finally, when the
Sudden fluctuations of large input voltage due to the nature of the lighting lamp, which is implemented as a discharge lamp, cause the lighting to turn off. In order to solve this problem, in the embodiment of the present invention, the core resistance CR is installed and the primary coil configuration of the
The illumination control amount as described above in the power saving operation mode is only exemplary in the embodiment of the present invention, and the illumination control amount under the normal and power saving operation modes can be variously changed according to the change of the matter.
Accordingly, the
As described above, when bidirectional communication is performed through the power line using the current and voltage fluctuations of the power line, the burden of the communication line installation cost is reduced, and the installation of the power line communication modem or the like is not required. In addition, since the power saving rate is high, power savings can be reliably achieved.
14 is a block diagram of a voltage master device of a power control communication device according to another embodiment of the present invention.
14, the voltage master device may include a
The
The voltage master device of FIG. 14 is connected to the current master device through the power line PL shown in FIG. 3 and monitors the
The voltage master device also generates a voltage signal 6660 that causes the voltage level of the AC power source to fluctuate by using the
As a result, the level of the voltage signal 6660 which causes the voltage level of the AC power source to fluctuate is determined by the resistance value of the
15 is a block diagram of a current master device of a power control communication device according to another embodiment of the present invention.
Referring to Fig. 15, the current master device may include a current master circuit 1010, an
The current master circuit 1010 includes an analog circuit portion 1012 and a control portion 1014 such as a CPU or a microprocessor. The controller 1014 may correspond to the
The current master device of FIG. 15 is connected to the voltage master device of FIG. 14 through the power line shown in FIG. 2 and monitors the
The current master device may be correspondingly connected to the voltage master device in a plurality of ways. That is, a plurality of current master devices may be connected to one voltage master device. On the other hand, if the sensor and the core resistance are not installed or operated in the current master device, they will function as a current slave device.
Although the
The
The current master device monitors the voltage level at a predetermined time period and detects a voltage signal applied for communication from the voltage master device.
As a result, the difference between the current master device and the voltage master device depends on whether the current is used as a communication signal or a voltage as a communication signal in performing power line communication using the current and voltage variation signals.
The current master device (C-MASTER) has a core resistor (6900) connected in parallel to the power line so that it can make voltage current power line communication (VCPLC) to generate a current signal. A triac, or SSR, which is a relay or a contactless switch for driving the core resistor, is connected in series with the core resistor. When the current signal is generated, once the relay is driven under no load, the excitation of the relay is prevented or minimized. When the generation of the current signal is stopped, the problem of deterioration of the relay contact can be solved by turning off the relay first after turning off the triac first.
Meanwhile, since the voltage master device V-MASTER can generate a voltage signal to perform the VCPLC, the
When the voltage signal is generated, the relay is driven first after no-load, then the triac is operated. When the voltage signal is generated, when the relay is driven after the triac is first turned on, the arc occurrence of the relay contact is minimized or reduced .
Also, if the core resistance is overheated to a certain level due to excessive VCPLC communication, a temperature sensor such as a thermistor senses it. Thus, the relay or triac is not driven so that the overheat of the core resistance is not increased.
FIG. 16 is a diagram illustrating a control example of the power control communication method according to FIGS. 14 and 15. FIG. FIG. 17 is a diagram illustrating a monitoring example of the voltage signal and the current signal of FIG. 16. FIG.
16, the voltage master device (V-MASTER) generates a plurality of
The current master device (C-MASTER) can generate the compensated current signals (5100, 5200, 5300, 5400) of the amplified form in accordance with the set holding time of the signal. In this case also, the setting holding time can be used as the ID value of the device.
In the figure, the waveforms shown in the line connected between the voltage master device (V-MASTER) and the current master device (C-MASTER) schematically show the voltage level (5000) and the current level (4900) For example, the voltage master device (V-MASTER) monitors the
The current master device (C-MASTER) monitors the
Referring to FIG. 17, C-MASTER and V-MASTER continuously compare the value of the current comparison section and the value of the previous comparison section, and store and discard the current comparison section.
For this monitoring operation, a signal having a voltage level (5000) and a current level (4900) is waveform-converted by performing the operation of the analog circuit portion and the lower portion of the waveform is discarded.
First, in the case of current signal detection, similar to that described with reference to FIGS. 4 and 6, after the waveform is converted to a + waveform, a lower constant level of the waveform is discarded as shown at the bottom of FIG. 17, Type current signal.
Similarly, in the case of the detection of the voltage signal, after the waveform is converted into the + waveform, the lower certain level of the waveform is discarded as shown in the upper part of FIG. 17, and the voltage signal is obtained as the decompressed type. Here, two waveforms showing a voltage signal of a reduced voltage type relatively lower than the amplitude of the normal voltage signals are shown. Therefore, these two decompression waveforms are recognized as voltage signals, and unique VCPLC communication according to the present invention is performed. The description related to the monitoring of the voltage and current signals in Fig. 17 is merely exemplary and it goes without saying that recognition of the communication signal can be performed by other methods or techniques.
As described above, when the voltage-current variation type power line communication is implemented by using the core resistance, the volume and size of the circuit elements are significantly reduced compared with the case of the voltage-current variation type by the down-transformer method. There is an advantage that the variation value of the current can be set as desired.
FIG. 18 is a diagram illustrating a detailed implementation of the illuminance control circuit of the illuminance control driver of FIG. 12;
The illuminance control circuit of FIG. 18 has been developed and developed for the following reasons. That is, the dimming power saving devices for saving power have been known to reduce the conduction angle of the sine wave by using a dimmer and to reduce the dimming by using a general single-ended transmission. These power-saving devices have a power saving efficiency of about 20%. Also, in the case of the discharge lamp, when the dimming power saving device is used, the discharge lamp is severely turned off due to instability of the power supply voltage of the power source. Such a shut-off phenomenon shortens the life span of the illumination lamp and makes it difficult for the person or the vehicle to approach the normal illumination control state from the dimming state even when approaching. Even in the case of the power saving operation, an operation of downing at a constant illuminance unconditionally only for a predetermined time has been performed.
In addition, there is a problem in the case of power saving using the phase control, which is limited to the incandescent lamp. A dimming controller using a triac, dimmer, dimming by damping the load power by delaying the application of the load voltage for 1/2 cycle. Such damping of the load power is suitable for resistive loads such as incandescent lamps, but not for other types of loads.
Due to the nature of the triac, the sustained current is needed. A resistive load such as an incandescent lamp is suitable for continuously supplying the retention current to the triac. However, the lights such as fluorescent lamps and LEDs receive power through the ballast. That is, since a lamp such as a fluorescent lamp or an LED is not a direct resistive load, it is difficult to supply a certain amount of current to the triac. Therefore, it is difficult to apply the phase control using the triac to incandescent lamps, and it is difficult to apply to illumination lamps such as LEDs.
18, the illuminance adjustment circuit may include a variable
The variable
The
The holding
The
The output
In FIG. 18, a holding
As another embodiment of the holding current supplying
Fig. 19 is a diagram showing another detailed embodiment of the illuminated control actuator of Fig. 12; Fig. 20 is an operation timing chart showing an example of a four-step power saving operation according to FIG. 19, and FIG. 21 is an operation timing diagram showing an example of a normal operation in four-step according to FIG.
19 corresponds to a specific circuit of the illumination lamp driving
Referring to Fig. 19, the connection structure of the first to ninth circuit block units 1100-1900 is shown in order to prevent the arc phenomenon of the relay contact as well as to prevent the lighting phenomenon from being turned off.
Here, the fifth
The drive control signal provided by the
The second
The third
The fourth
The
The seventh
The eighth
The ninth
In the circuit of Fig. 19, the relay elements in the second and fourth
The triacs in the third
The resistors R4-R6 are provided to prevent the illumination lamps from being turned off, and serve as setting resistors for increasing the impedance at the time of minimum illumination.
In Fig. 19, the fifth
20 shows the power saving operation timing in four stages which are sequentially performed according to the lapse of time when the
Referring to FIG. 20, the
In the case where the normal illuminance of the
In the time interval D1 / TIME between the start point (L0) and the first point (L1) of FIG. 20, the illumination lamp is turned on in normal illumination.
If the vehicle or person is not detected in the time period (D1 / TIME), the first step power saving operation is started. However, when a vehicle or a person is detected in the time interval (D1 / TIME), the normal illuminance control operation is maintained.
First, at the start point (L0), a BY signal in an active state and a PK signal in an inactive state are applied to the first
In the first step power saving operation, the PK signal in the activated state before the first time point L1 is applied to the first
In this state, the L-1 signal in the activated state at the first time point (L1) is applied to the first
When the first power saving operation is performed, the driving voltage bypassed from the output tap OT1 to the output terminal PHASE of the primary coil in the
In this manner, during the 50% power saving control, that is, during the second power saving operation, the driving voltage obtained from the second node tap TN2 through the output tap OT1 is driven to the output terminal PHASE by driving of the corresponding relay and triac, Lt; / RTI >
In the 40% power saving control, that is, in the third power saving operation, the driving voltage obtained from the third node taps TN3 through the output tap OT1 is given to the output terminal PHASE by driving of the corresponding relay and triac.
In the 20% power saving control, that is, in the fourth power saving operation, the driving voltage obtained from the fourth node taps TN4 through the output tap OT1 is given to the output terminal PHASE by driving of the corresponding relay and triac.
In the case of the embodiment of the present invention, the four-step power-saving operation is described by way of example, but it is to be understood that the present invention is not limited thereto.
In Fig. 20, if no vehicle or person is detected during the time period (D4 / TIME), the four-step power-saving operation is started. However, when a vehicle or a person is detected in the time interval D4 / TIME, the control returns to the normal illuminance control operation as shown in FIG.
In the fourth step power saving operation, the PK signal in the activated state before the fourth time point L4 is applied to the first
In this state, the L-4 signal in the activated state at the fourth time point L4 is applied to the first
When a certain time elapses at the fourth time point L4, the triac PK-TA in the
As described above, at least one of the relays RY1-1 to RY1-4 in the second
21, the horizontal axis represents time, and the vertical axis represents the control level of each drive control signal applied to the first
Referring to FIG. 21, in the case where an event is generated to control the illumination lamp again to normal steady state in the state where the power saving operation is being performed as described above (for example, when the vehicle is sensed) An OR signal and a BY signal in an inactive state are applied to the first
The triac PK-TA in the sixth
After the bypass relay (BY-RY) is switched off and a predetermined time has elapsed, an inactive L-4 signal is applied to the first
L-4, L-3, L-2, and L-1 signals in the deactivated state from the time point L4 to the time point L1 in FIG. 21 are sequentially applied to the first
The power saving operation of the illumination lamp is terminated at the time point L1 and the normal illumination control operation of 100% is started again. At this time, the triac (OUT-TA) in the
When a person or a vehicle is detected through the detection sensor, the circuit of Fig. 19 and the circuit of Fig. 20 installed in the illumination control driver are immediately driven. As a result, the illuminance of the illumination lamp quickly returns to the normal illuminance, for example, 100% of the illuminance. On the other hand, when the person or the vehicle is not detected for a predetermined time in the normal illuminance state, the power saving operation for each step is performed again by the circuit of Fig. 19 or the circuit of Fig. This operation is advantageous in that it does not inconvenience or hinder the entry of a person or a vehicle while performing a power saving operation. Moreover, the light-pollution prevention system is programmed in the control unit to set the reservation time and the cancellation time by the light-pollution prevention system according to the installation place so that the power-saving operation is performed after the set time, Can be performed. As a result, the problem caused by light pollution is solved, so that a function as a power saving device of smart lighting is provided.
22 is an illustration of an implementation of a powerline communication device including a grounded connection powerline communication modem in accordance with another embodiment of the present invention.
Referring to Fig. 22, the power line communication apparatus includes a plurality of communication modems B1, B2, B3, and B4. For convenience of explanation, the communication modem B4 connected to the in-wall outlet in the household will be referred to as a first communication modem. The communication modem B1, which can be installed in the voltage drop transformer installed in the main pole supporter, that is, the telephone pole, is used as the third communication modem, the communication modem B2, B3, which can be installed in the meter box of the customer, The modem will be referred to as a modem without any other purpose than the convenience of description. More specifically, the communication modem B2 may be referred to as a 3-1 communication modem, and the communication modem B3 may be referred to as a 3-2 communication modem. However, the present invention is not limited to this, and it will be understood that a plurality of communication modems B1 to B4 may be sequentially referred to as first, second, and third communication modems.
The communication modems B1 to B4 shown in Fig. 22 use the ground (earth or ground) as a part of the communication line. The communication modems B1 to B4 use DC power as communication signals. DC power is generated by rectifying AC power supplied through power lines. In the case of indoor power line communication, the first line of the power lines and the indoor ground line are used as communication lines. Also, in the case of outdoor power line communication, the first line and the ground of the power lines are used as a communication line, and the ground is connected to the DC power ground terminal of the communication modem through a ground bar.
First, the first communication modem B4 is connected to power lines A5 for supplying AC power into the household and a first ground ground line A13 for the power lines A5. The first communication modem B4 generates a DC power source transformed and rectified from the AC power source. The first communication modem B4 is connected between the first line of the power lines (for example, any one of the R phase (indicated by PH) and the N phase of the power lines A5) and the first ground ground line A13 And transmits the modulated communication signal to the destination (for example, the third communication modem or the second communication modem). The first communication modem B4 receives an incom- ing modulated communication signal (e.g., an N-phase line) received via the modem ground B4-15 connected to the first ground line A13 Lt; / RTI >
The modulated communication signal may be DC data as shown in FIG. Also, an incom- ing-modulated communication signal may appear like the DC data of Figure 24 between the first line (e.g., N-phase line) and the modem ground (GND: B4-15). The modem ground (GND: B4-15) indicates a ground (GND) terminal of the bridge rectifier B4-8 that performs full-wave rectification.
Fig. 24 is a signal waveform diagram C1 showing an example of DC data appearing through the power line communication apparatus of Fig. 22; Fig. 24, the channel CH1 in the signal waveform diagram C1 represents the waveform of the alternating voltage applied through the power lines A5 through the first channel of the oscilloscope, and the channel CH2 is connected to the power lines A5 B2-15, B3-B4, and B5-3 of the communication lines when a communication signal is transmitted through the first line (line N) and the first ground line A13, 15, and B4-15) through a second channel of the oscilloscope.
The waveform signal (C1-1) of the first channel shows a signal of AC 220V in the form of a sine wave (sine wave) normally supplied to the household of the customer. On the other hand, the waveform signal C1-3 of the second channel represents a DC data signal of DC + peak voltage type. The interval C1-4 represents one period of the four periods of the binary data. C1-2 indicates the range of voltage values of
22 has circuit components as shown in Fig. 23, and the first communication modem B4 in Fig. 22 has the circuit components as shown in Fig. 23, and the first line (for example, the R phase of the power lines A5 and the N phase line in the N phase) (For example, a third communication modem or a second communication modem) between the first ground ground wire A13 and the communication signal as shown in the second channel of Fig. The first communication modem B4 also has circuit elements as shown in Fig. 23 and is connected between the first line (line N) and the ground (B4-15) of the first communication modem B4 DC voltage type communication signal. The received communication signal is a communication signal (as an incom- ing-modulated communication signal) as seen in the second channel of Fig. The incom- ing-modulated communication signal is demodulated by the CPU B4-12 of the first communication modem B4 in the reception period of the communication signal.
FIG. 23 is a diagram showing a specific circuit configuration of the first communication modem B4 in FIG.
Referring to FIG. 23, the first communication modem B4 includes a transformer and a rectifier including a transformer B4-9 and a bridge rectifier B4-8. That is, the transforming and rectifying section is connected to the power lines (line on the PH and line on the N-phase) to transform the voltage of the AC power source according to the set winding ratio of the transformer B4-9 and to rectify the bridge rectifier B4-8 And full-wave rectifies the transformed AC voltage to generate the DC power.
The transformer B4-9 functioning as a lottery type insulation transformer transmits the AC voltage between the power lines A5 and the DC voltage generated by the bridge rectifier B4-8 for full wave rectification to the first line And serves as a necessary AC / DC insulation forming element.
Here, in the case of the three-phase four-wire type, the PH shown through the power lines A12 means a hot line and means a line of any one of R, S, and T phases. Further, N means a neutral line, i.e., a neutral line. Thus, the line-to-line voltage of R-N, S-N, or T-N is 220 volts and the phase-to-phase voltage of R-S, S-T, or T-R may be 380 volts, which is three times the root of the line- Although the voltage of the three-phase four-wire type is taken as an example, it will be understood that the present invention is not limited thereto and can be applied to other connection or AC power transmission schemes.
Adjusting the volume resistors (B4-10) allows powerline communication at various voltage levels. That is, if the discrimination is made according to the detection voltage level band, the communication between the indoor and outdoor buildings and the building can be distinguished, and if the voltage level is differentiated according to the communication area, the power line communication can be performed for each transmission area.
In Fig. 22, WH (A10) in the meter box A2 indicates a meter, reference numeral A14 of the indoor outlet A3 indicates an electrical outlet, and reference symbol A11 indicates a leakage breaker in the household. Line A13 indicates a third-type ground wire laid together with power lines of the outlet.
The first communication modem B4 includes a transmission / reception unit. The transmission / reception unit receives the DC power applied from the transforming and rectifying unit. The transceiver transmits a modulated communication signal between the first line and the first ground line to the destination. In addition, the transceiver includes a transceiver for demodulating an incom- ing-modulated communication signal received via the first line and the modem ground (B4-15). The transceiver may include circuit components B4-1 to B4-6, B4-10 to B4-14 except for the transformer B4-9 and the bridge rectifier B4-8 in FIG. Among the circuit components B4-1 to B4-6 and B4-10 to B4-14, the circuit component B4-12 includes a CPU (central processing unit) functioning as a control unit of the modem for generating and transmitting DC data, And B4-14 and B4-5 are photocouplers controlled by the CPU B4-12, respectively. Further, B4-1 and B4-2S are power semiconductor devices each of which can be realized as a field effect transistor (FET), a thyristor or a triac. For example, in the case where the power semiconductor device has three terminals, the current may flow or be interrupted between the remaining two terminals by control through the gate terminal. B4-4, and B4-11 are capacitors for DC voltage charging, respectively, and B4-6 and B4-10 are resistors for current limitation, respectively. It will be appreciated that inductors or diodes may further be included in the first communication modem B4 and further circuitry elements, not shown, required for circuit operation may be further included.
In Fig. 23, the ground ground line can be the earth ground line A13, which is connected to the power semiconductor element B4-2. Further, a first line (e.g., N-phase line) is coupled to one of the primary windings of the transformer B4-9, which is connected to the capacitor B4-4 through the power semiconductor device B4-1. ). The capacitor B4-4 may be replaced by a resistor.
On the other hand, the circuit of the second communication modem B1, which can be installed in the third communication modems B2 and B3 that can be installed in the meter box A2 of the customer and the pillar transformer A4 in the columnar ladder A1, The components may also be the same as the circuit components of the first communication modem B4. 22, the transformer B4-9 in the first communication modem B4 is represented by the transformer B1-9 in the second communication modem B1, In the modem B2, it is indicated as a transformer B2-9. Likewise, other circuit elements are labeled according to the communication modem, with the leading character changed.
The second communication modem B1 is connected to both ends of the secondary winding of the transformer A4 and includes supply power lines A5 for providing AC power to the consumer meter A2 and a second ground ground line A8 for the supply power lines And generates a DC power source transformed and rectified from the AC power supplied through the transformer A4. The second communication modem B1 is connected to the second ground line A8 (ground) via a modulated communication (first communication line) between the first supply line (the N-phase line facing the meter side) And transmits the signal to the third or first communication modem. The second communication modem B1 demodulates the incom- ing-modulated communication signal received from the third or first communication modem through the first line and the modem ground B1-15. The modem grounding bar (B1-7) is connected to the grounding bar (B2-7) of the third communication modem via the ground A8.
The third communication modems B2 and B3 are installed at the location of the box A2 of the acceptance meter and are composed of the third-first communication modem B2 and the third-second communication modem B3. The first line of the communication line becomes the supply first line (N-line line in A5). The second line of the communication line is a ground A8 connected between the ground bar B1-7 and the ground bar B2-7, that is, the ground.
The communication signal of the second communication modem B1 is applied to the CPU B2-12 of the third-first communication modem B2. The CPU B2-12 communicates with the CPU B3-12 of the third-second communication modem B3 via the connection line B2-16. The connection line B2-16 may be implemented through a PCB pattern. The communication signal of the second communication modem B1 is relayed to the CPU B3-12 of the third-second communication modem B3 through the connection line B2-16. The relayed communication signal is transmitted to the first communication modem B4 connected to the first supply line (line N in A5) and the ground line A13. As a result, the first communication modem B4 receives the DC voltage appearing between the first line A13 and the first line A13 as communication data.
Conversely, the communication signal of the first communication modem B4 is provided between the first supply line (line N in A5) and the second line (A13: third-type ground line). The communication signal of the first communication modem B4 is transmitted to the third-second communication modem B3 and relayed to the third-first communication modem B2 through the connection line B2-16. The 3-1 communication modem B2 transmits the communication signal of the first communication modem B4 to the second communication modem B1 via the relay line between the second line and the second line in the first line A5 do. In this case, the second line is a ground line connecting the grounding bar B2-7 to the ground ground A8 and the grounding bar B1-7 of the second communication modem B1. Accordingly, the second communication modem B1 can receive the communication signal of the first communication modem B4.
First, data communication between the second communication modem B1 and the third communication modem B2 will be described.
Conventionally, a conventional power line communication system is a system in which communication is performed by transmitting a high-frequency modulated signal through a 220-volt voltage signal via power lines (R-phase and N-phase lines) of two lines. There is a problem that when the communication signal modulated at a high frequency is transmitted through the power lines, it is difficult to match the voltage of the power line and the communication signal is mostly radiated or lost to the air and the ground. Also, the resistance value of the resistive load devices does not allow the high frequency signal to reach the destination and is distorted or attenuated, so that it is difficult to ensure the communication quality.
However, in the embodiment of the present invention, a DC voltage (voltage) is applied between the first line (N-phase line of the power lines A5) and the ground line Type communication signal is transmitted. Here, the second line, that is, the ground ground line refers to two ground rods B1-7 and B2-7 connected to each other via the ground A8.
Referring to FIG. 22, when the third communication modem B2 transmits data to the second communication modem B1, among the power lines A5 for supplying AC power, A communication signal in the form of a DC voltage is loaded between the ground ground wire (second wire) and the ground ground wire (second wire). For this purpose, it is necessary to maintain the continuous connection of the ground ground wire (formation of a closed circuit). That is, the ground ground line is connected to the first, second, and third communication modems B4, B1, and B2-B3. The grounding wires A13 of the first communication modem B4, the grounding rods B2-7 and B3-7 of the third communication modem B2-B3 and the grounding rods B1-7 of the second communication modem B1 Are connected to one line via the ground A8.
Accordingly, when the continuous grounding line can not be maintained due to the absence of the grounding rods, it may be necessary to provide the grounding rods in the required places to form a connection with the ground.
In the second communication modem B1 of Fig. 22, a relatively large-capacity diode A4-3 is provided in the ground terminal box A4-2 of the pillar-form transformer A4 in the column-shaped transformer A1. The diode A4-3 is a circuit element for preventing the collision of the DC voltage. That is, the DC + voltage and the DC GND provided as communication signals are short-circuited when the diode A4-3 is not present. As a result, in order to transmit a communication signal to a long distance, a device for preventing a short circuit is required.
More specifically, the DC + voltage output from the power semiconductor element B2-1 is applied to the first line (N-phase line in A5) when the communication signal is provided in the 3-1 modem B2. The first line is connected to the pillar-shaped transformer A4 in the columnar strut A1. As a result, the DC + voltage causes the DC current to flow to the ground A8 through the second type grounding rod A6 of the pillar transformer A4. On the other hand, the voltage of the DC GND of the third communication modem B2 is connected to the grounding bar B2-7 through the power semiconductor element B2-2. The ground bar B2-7 is connected to the second type grounding bar A6 using the ground A8 as a connection medium. Therefore, when the diode A4-3 is provided, the DC + voltage is prevented from being shorted to the DC GND. If a short circuit occurs, the DC + voltage may disappear instantaneously at a low voltage below a certain voltage, so communication to a long distance may not be easy.
Also, the diode A4-4 in the ground terminal box A4-2 is the same as the diode A4-3, which is different from the diode A4-4 in the installation direction. As a result, the diode A4-4 smoothly transmits a communication signal to the second communication modem B1 from a communication modem installed on an external electric pole different from the main pole A1.
It has been experimentally demonstrated that power line communication is possible if the distance between the communication modems is less than 100M without installing the diodes A4-3 and A4-4. This is because there is a certain amount of ground resistance on the ground line connected through the ground rods. That is, there is a ground resistance value between the second-class grounding rods (B1-7) and the third-class grounding rods (B2-7). Therefore, the degree of the potential difference depends on the magnitude of the ground resistance value.
In the third communication modem B2, the DC GND (B2-15) of the bridge rectifier B2-9 is connected to the ground ground line A8 through the switching power semiconductor element B2-2. On the other hand, DC + of the DC voltage charging capacitor B2-4 is connected to the first line (line N) of the power lines A5 through the switching power semiconductor element B2-1. Therefore, when the power semiconductor device B2-1 is turned on, a DC + voltage (for example, a set DC voltage) is applied to the first line (line N) via the capacitor B2-4. When the switching power semiconductor device B2-2 is turned on, the DC GND B2-15 is connected to the ground A8 and the grounding bar B1-7 connected to the ground bar B2-7. Therefore, a communication signal in the form of a DC voltage appears in the input section B1-13 of the second communication modem B1. That is, the DC voltage data of the high pulse type like the DC data of Fig. 24 is provided to the CPU B12 of the second communication modem B1. The input unit B1-13 may be connected to the CPU B1-12 of the second communication modem B1 through an AD converter.
The DC + voltage is applied through the first line (line N in A5) of the power lines due to the turn-on of the power semiconductor elements B2-1 and B2-2, and the DC GND (B1-15) It flows through the ground line. As a result, a DC high pulse type voltage is generated between the first line and the second line. The high pulse may be
On the other hand, another type of power line communication is as follows. The power semiconductor elements B2-1 and B2-2 of the third communication modem B2 are first turned on to supply the DC + voltage to the first line. The second ground line serves as a line connecting the ground rods (B2-7) - the ground (A8) - the ground bar (A6). The DC + voltage appears in the detecting section B1-13 of the AD converter of the second communication modem B1. When the power semiconductor element B2-2 is driven again, the grounding rods B1-7 to ground A8 and the grounding bar A6 are shorted to the first line. Thus, the charging voltage of the capacitor B2-4 is instantaneously discharged. The current due to the pulse + DC + voltage flows to the ground. Eventually, the communication data may be transmitted in microseconds to milliseconds.
More specifically, first, when the power semiconductor elements B2-1 and B2-2 of the third communication modem B2 are turned on at the same time, the pulse width of the DC voltage in the ADC converter detecting section B1-13 of the second communication modem B1 A data signal is detected.
On the other hand, the resistor B2-3 is an element provided to prevent a current exceeding leakage sensitivity from flowing when the DC voltage is charged to the capacitor B2-4 at the initial stage of the communication operation of the modem to prevent the circuit breaker or the like from being disconnected. When the current of the capacitor B2-4 is instantaneously applied to the first line during the charging operation of the DC voltage, the earth leakage breaker or the like may be cut off. Therefore, in order to prevent this, the charge current can flow through the resistor B2-3 while preventing the circuit breaker of the earth leakage breaker during the charging operation of the capacitor B2-4.
Receiving the communication signal, the CPU (B2-12) supplies the DC data as shown in Fig. 24 from the first supply line (N-phase line) through the receiving volume resistance (B2-10) Lt; RTI ID = 0.0 > (B2-13). ≪ / RTI > The CPU (B2-12) receives the received data signal of the pulse shape as shown in Fig. 24 having passed through an internal resistor and an operational amplifier through the ADC converter and restores the original data sent from the transmission side.
Binary data can be generated by controlling the photocouplers B2-5 and B2-14 and turning on / off the power semiconductor devices B2-1 and B2-2 as described above. In addition, binary data can be converted into decimal and hexadecimal numbers, and power line communication (PLC) can be performed accordingly.
The indoor communication between the third communication modem B3 and the first communication modem B4 is performed similarly to the outdoor communication as described above between the third communication modem B2 and the second communication modem B1 . In this case, the ground line that becomes the second line may be the third-class ground line A13 embedded in the buried pipe of the receptacle A-14. A diode B3-16 is connected to the third communication modem B3. The diode B3-16 serves to prevent a short circuit between the first line and the second line. That is, when there is no diode B3-16, the first line (line N in A5) and the second line are short-circuited. In this case, the DC + voltage is discharged to the ground due to the connection of the ground rods B3-7, the ground A8 and the second type grounding bar A6. As a result, the diode B3-16 prevents a short circuit between the DC + voltage and the DC GND voltage so that DC pulse type data can be transmitted.
In the case of power line communication between the second communication modem B1 and the first communication modem B4, the third communication modem B2-B3 serves as a relay modem. As a result, the CPU B2-12 and the CPU B3-12 in the third communication modem B2-B3 are connected to each other via the connection line B2-16. Communication between the first communication modem B4 and the second communication modem B1 is performed by the relaying role of the third communication modem B2-B3. For example, the CPU B3-12 of the 3-2 communication modem B3 receives the communication signal transmitted from the first communication modem B4, and the CPU B2 of the 3-1 communication modem B2 -12). ≪ / RTI > The CPU B2-12 transmits the communication signal of the first communication modem B4 to the second communication modem B1. As a result, data in the form of a DC pulse voltage can be communicated between the first communication modem B4 and the second communication modem B1 via the relay of the third communication modem B2-B3.
As described above, if another DC voltage (communication signal) is supplied to the commercial power line supplying AC, the data can be transferred to a relatively long distance according to the voltage value and the current value of the capacitor B2-4. The capacitor B2-4 may be replaced by a resistance element, although it is not limited thereto. Alternatively, the capacitor-contact type high-frequency modulated signal used in the existing power line communication method may be transmitted on the first line and the second line.
According to this communication method, the power line communication can be continuously extended and executed through the KEPCO and another KEPCO without distortion or loss of data. Therefore, the configuration of a broadband Internet network may be possible.
As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention.
Description of the Related Art [0002]
100: first communication device
200: second communication device
Claims (24)
Generating a voltage signal that is connected to the first communication device via the power line and causes a voltage level of the AC power source to vary during a second communication signal transmission time, monitors the current level of the AC power source, And a second communication device for detecting the current signal generated by the second communication device,
Wherein the first communication device and the second communication device are configured to perform voltage-current based power line communication, wherein the power source variation of the power line is used as a communication signal.
Generating a voltage signal that is connected to the first communication device through the power line and causes a voltage level of the AC power source to fluctuate during a second communication signal transmission time when a control event is generated and monitors a current level of the AC power source, And a second communication device for detecting the current signal generated by the first communication device as a control response signal,
Wherein the first communication device and the second communication device are configured to perform voltage-current based power line communication, wherein the power source variation of the power line is used as a communication signal.
Generates a voltage signal that is connected to the first communication devices through the power line and causes a voltage level of the AC power source to fluctuate during a second communication signal transmission time when a control event occurs, and monitors a current level of the AC power source And a second communication device for receiving the current signal generated by at least one of the first communication devices as a control response signal,
Wherein the first communication devices and the second communication device are configured to perform voltage-current based power line communication, wherein the power source variation of the power line is used as a communication signal.
A current signal which is connected to a power line to which AC power is supplied and changes the signal amplitude of the AC current for a predetermined time is generated as a slave communication signal and the signal amplitude of the AC voltage appearing on the power line is monitored for a predetermined time, A first communication device for controlling a control target group at the time of detection as a signal; And
Generating the voltage signal, which is connected to the first communication device through the power line and causes the signal amplitude of the AC voltage to fluctuate when the control event occurs, as the master communication signal and monitors the signal amplitude of the AC current, And a second communication device for detecting the current signal generated by the first communication device as a response signal,
Wherein the first communication device and the second communication device are configured to perform voltage-current based power line communication, wherein the power source variation of the power line is used as a communication signal.
The first communication device comprising:
A current change driver for generating a switching drive signal in response to the voltage signal detected as a master communication signal;
A switching unit operated in response to the switching driving signal;
A load resistor that is connected in parallel to the power line when the switching unit is operated and functions as a setting resistor to generate the slave communication signal;
A line voltage ramp lowering the voltage of the power line to produce an output voltage to detect the master communication signal;
A zero crossing detection unit receiving the output voltage of the line voltage drop unit and detecting a zero crossing point of the voltage signal;
A voltage change detection unit receiving the output voltage of the line voltage drop unit and generating a voltage change detection signal indicating a voltage level variation of the power line;
Wherein the controller is operative in synchronization with the zero crossing point to perform communication via the power line and generates the current signal as the slave communication signal and analyzes the voltage change detection signal received from the voltage change detection section A slave controller for generating a voltage change drive control signal when the voltage signal is determined as the master communication signal; And
And a drive circuit for controlling the controlled object in response to the voltage change drive control signal,
The second communication device comprising:
An input interface unit for interfacing inputs of the input unit to generate an input signal for generating the control event;
A voltage change driving unit for generating a voltage change switching drive signal in response to an applied reduced pressure master control signal;
A switching unit operated in response to the voltage change switching drive signal;
A reduced-pressure resistor that is connected in series to the power line when the switching unit is operated and functions as a setting resistor to generate the master communication signal;
A line current change detection unit receiving a current applied through a current transformer connected to the power line and generating a current change detection signal indicating a current level variation of the power line;
A zero crossing detection unit receiving an alternating current applied through the current transformer and detecting a zero crossing point of the current signal; And
Generating a reduced-pressure master control signal that is operated in synchronization with the zero-crossing point so that communication via the power line is performed and causes the reduced-pressure resistor to be serially connected to the power line when the input signal is generated, And a master control unit that analyzes the current change detection signal as a set of analysis conditions and determines the current signal as a response signal when the current signal is determined as the slave communication signal, A power control communication device used as a communication signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160030005A KR101891877B1 (en) | 2016-03-13 | 2016-03-13 | Power control communication device using current and voltage change in power line |
| PCT/KR2017/002673 WO2017160036A1 (en) | 2016-03-13 | 2017-03-13 | Power-controlled communication device using power fluctuation of power line as communication signal |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020160030005A KR101891877B1 (en) | 2016-03-13 | 2016-03-13 | Power control communication device using current and voltage change in power line |
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| KR1020180048204A Division KR20180048494A (en) | 2018-04-26 | 2018-04-26 | Power control communication device using current and voltage change in power line |
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| KR20170106617A KR20170106617A (en) | 2017-09-21 |
| KR101891877B1 true KR101891877B1 (en) | 2018-08-27 |
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| WO (1) | WO2017160036A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102039654B1 (en) * | 2018-12-28 | 2019-11-01 | 김근식 | Power line communication system in AC-powered devices |
| CN109799393B (en) * | 2018-12-29 | 2024-03-12 | 王翰凌 | Ground resistance tester for household circuit |
| CN109785555B (en) * | 2019-03-15 | 2023-08-08 | 广西科技大学鹿山学院 | Ward calling system and calling method thereof |
| KR102609837B1 (en) | 2019-04-04 | 2023-12-05 | 삼성전자 주식회사 | Electronic device and method of communicating with an external device via a power supply line |
| KR102333914B1 (en) * | 2019-08-16 | 2021-12-13 | 최창준 | Power Line Communication with Polarity switching |
| KR102263801B1 (en) * | 2020-11-26 | 2021-06-14 | (주)와이즈랩 | Communication system using power line |
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| JP2775063B2 (en) * | 1989-07-17 | 1998-07-09 | 松下電工株式会社 | Fire monitoring method and system using multiplex transmission |
| KR100759100B1 (en) * | 2006-07-12 | 2007-09-19 | 주식회사 씨쎄븐 | Apparatus and method for driving led illuminated displaying devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101174014B1 (en) * | 2010-11-30 | 2012-08-16 | 엘지이노텍 주식회사 | System for supplying power in adjusting quantity of light |
| KR101300379B1 (en) * | 2010-12-15 | 2013-08-29 | 삼성전기주식회사 | Power supply having protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2775063B2 (en) * | 1989-07-17 | 1998-07-09 | 松下電工株式会社 | Fire monitoring method and system using multiplex transmission |
| KR100759100B1 (en) * | 2006-07-12 | 2007-09-19 | 주식회사 씨쎄븐 | Apparatus and method for driving led illuminated displaying devices |
| KR101235220B1 (en) * | 2006-07-28 | 2013-02-20 | 삼성전자주식회사 | Phase detectiom device and phase controlling device having the same and fuser controlling device |
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| KR20170106617A (en) | 2017-09-21 |
| WO2017160036A9 (en) | 2018-09-20 |
| WO2017160036A1 (en) | 2017-09-21 |
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