KR102352114B1 - Power line communication system driven in selective mode and method thereof - Google Patents

Abstract

The present invention relates to a powerline communication system driven in a selective mode. The powerline communication system driven in a selective mode comprises: a master (100) which receives and transmits data through a powerline; at least one repeater which relays a signal of the master; and a plurality of slaves (200) which receive data from the master (100). The master (100) is driven in at least one of a frequency modulation mode for transmitting data to the plurality of slaves (200) connected through the power line by modulating a frequency of AC power and a switching control mode of cutting off AC power for a set period and transmitting and receiving data to and from the slaves (200) for the interrupted period. According to the present invention, a stable communication state without an external noise source can be maintained.

Description

POWER LINE COMMUNICATION SYSTEM DRIVEN IN SELECTIVE MODE AND METHOD THEREOF

The present invention relates to a powerline communication system and method operated in selective mode.

Power line communication (PLC) is a communication technology that uses a power line as a communication medium. Data goes through the same power lines that provide electricity and traditional power lines for homes or cars that can be used for this purpose.

1 is a view for explaining the prior art.

Referring to FIG. 1, in the conventional power line communication system, data (refer to (b) of FIG. 1) is coupled (refer to (b) of FIG. 1) to AC power (see (a) of FIG. c)) and transmitted to a plurality of slaves connected through a power line.

Here, the slave transmits the data received from the master to one or more loads (eg, devices such as generators, sensors, pumps, lights, etc.), or controls or diagnoses each load with commands according to the data.

Such a conventional system modulates the frequency of the AC power shown in FIG. 1 (a) and couples the data shown in FIG. has been sent

Such a frequency modulation power line communication method is capable of transmitting large amounts of data at high speed. However, in the prior art, noise inevitably occurs as a power line is used. Therefore, in the prior art, a capacitor is added to shield noise. was provided with

However, the conventional power line communication system modulates the frequency of AC power and recognizes it as noise when transmitting a data carrier, so that the capacitor removes the data carrier, so that the signal may be lost or weakened.

Therefore, the conventional power line communication method of the frequency modulation method has a problem in that the communication distance of data is shortened or communication is impossible as it is a frequency modulation method in which data is coupled by modulating the frequency of AC power.

Therefore, in the prior art, when the master transmits data to a plurality of slaves, the data transmitted from the master may not be received by the slaves located at a distance of 100M or more.

However, in the prior art, as the master transmits randomly without specifying the transmission time, either one of the repeaters or the slave set as a repeater breaks down, or when it is difficult to receive a signal because the repeater is too far from the master, the repeaters There was a problem in that the signal overlapped and communication was difficult.

Therefore, in the prior art, in a situation where remote control of a repeater or slave is required to solve a communication abnormality, it is difficult to respond quickly due to deterioration of communication quality due to noise sources, limitation of communication distance, and signal overlap between repeaters. there was

Republic of Korea Patent Publication No. 10-1898554 (2018.09.07)

Therefore, an object of the present invention is to provide a power line communication system and method driven in a selective mode capable of remote control of a slave or repeater regardless of distance in order to solve the problems of the prior art.

In addition, another object of the present invention is to provide a power line communication system driven in a selective mode that can improve communication quality by selectively setting a data transmission mode for each situation, such as data capacity, transmission time, and communication abnormality, and a method therefor. is in providing.

Accordingly, the present invention may include the following examples in order to achieve the above object.

An embodiment according to the present invention includes a master for transmitting and receiving data through a power line, and at least one repeater for relaying a signal of the master; and a plurality of slaves receiving data from the master, wherein the master modulates the frequency of AC power to transmit data to a plurality of slaves connected through a power line and cuts off power during a set period in AC power and , characterized in that the operation is performed in at least one of the switching control modes for transmitting and receiving data to and from the slave during the blocked section.

In addition, in the above embodiment, the master includes a master sensing unit that detects the start and end points of a section set in AC power, a switching section that switches AC power to cut off power during a set section, a coupling section that transmits data to the slave, and a set A master control unit for controlling the switching unit and the coupling unit to transmit data as a frequency modulation mode or a switching control mode according to a mode conversion condition, wherein the mode conversion condition is set to at least one of data capacity, communication abnormality, and repeater control command characterized in that

In addition, the set section includes a first reference set as the time from the starting point set on the left of the zero potential point to the end point set on the right side of the zero potential point, and a second standard set as the time from the starting point set on the left side of the zero potential point to the zero potential point. It may be set as at least one of the third criteria set as the time from the starting point set as the upper point to the end point set at the right side of the zero potential point.

The slave controls the slave transmitter according to the detection signal of the slave detector that detects the frequency modulation mode and the switching control mode, the slave transmitter that transmits data according to the detection signal of the frequency modulation mode or the switching control mode of the slave detector, and the slave detector and a slave control unit, wherein the slave transmission unit transmits data during a period in which power is cut off in the switching control mode.

Another embodiment of the present invention comprises: a) driving in a frequency modulation mode in which a master modulates the frequency of AC power to couple data and transmits and receives data to a plurality of slaves connected through a power line; b) the master Switches the AC power to cut off from the start point to the end point of the set section, and drives it in a switching control mode that transmits data to a plurality of slaves during the cut off section, and c) the master sets while transmitting data in the frequency modulation mode. The method may include at least one of switching to a switching control mode according to a mode switching condition and driving in a mixed mode for transmitting and receiving data to a plurality of slaves.

In step c), the mode switching condition may include one or more of data capacity, communication abnormality detection, and a remote control command of the slave 200 .

Step c) is c-1) transmitting and receiving data from the master to a plurality of slaves in frequency modulation mode, and c-2) when the master detects a mode switching condition, it switches from the frequency modulation mode to the switching control mode. Turning off the power during the set section and transmitting data during the cut off section, c-3) receiving a response from the slave from the master, inquiring the status of the slave, and controlling the slave according to the result of the status inquiry; and c -4) including the step of switching from the switching control mode to the frequency modulation mode after the control of the slave in the master.

A plurality of slaves are set as at least one repeater that relays the master's communication, the master calls all slaves in frequency modulation mode, and when communication abnormality is detected during the call, it switches to the switching control mode to sequentially call and control the repeaters It further includes a repeater control mode.

Therefore, the present invention can maintain a stable communication state in which an external noise source is removed as a signal is transmitted by cutting off the power, thereby enabling rapid situation propagation and response in case of an emergency.

1 is a diagram schematically illustrating a conventional power line communication method.
2 is a block diagram illustrating a power line communication system driven in a selective mode according to the present invention.
FIG. 3 is a block diagram illustrating the master of FIG. 2 .
FIG. 4 is a block diagram illustrating the slave of FIG. 2 .
5 is a graph illustrating an embodiment of the present invention.
6 is a block diagram illustrating a power line communication method driven in a selective mode according to the present invention.
7 is a flowchart illustrating step S210.
8 is a flowchart illustrating step S220.
9 is a flowchart illustrating step S300.
10 is a flowchart illustrating step S400.

The terms or words used in the present specification and claims are not to be construed as limited in their ordinary or dictionary meanings, and on the principle that the inventor can appropriately define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, terms such as “…unit”, “…group”, “module”, and “device” described in the specification mean a unit that processes at least one function or operation, which is implemented by a combination of hardware and/or software can be

Throughout the specification, the term “and/or” should be understood to include all combinations possible from one or more related items. For example, the meaning of “item first, item second and/or item third” may be presented from the first, second, or third item as well as two or more of the first, second, or third item. A combination of all possible items.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a power line communication system driven in a selective mode according to the present invention, FIG. 3 is a block diagram showing the master 100, and FIG. 4 is a block diagram showing the slave 200.

2 to 4 , the present invention operates according to a control command received from a master 100, a plurality of slaves 200 connected to the master 100 and power line communication through power line communication, and a control command received from the slave 200. A plurality of loads 300 may be included.

Here, the slave 200 performs the command of the master 100 and transmits the result and the response according to the call, and performs information and control of the connected load 300 . In addition, one or more of the plurality of slaves 200 may be set as repeaters capable of relaying the signal of the master 100 .

The repeater receives data transmitted from the master 100 and transmits signals to other adjacent slaves 200 and repeaters. The repeater can be arbitrarily set by the master 100 . For example, if the maximum transmission range of the master 100 is 1 to 5 slave 200, the repeater is set to the 5 slave 200 and sends the signal of the master 100 to the 5 and subsequent slaves 200. relay the

That is, the entire slave 200 is set to be divided into a plurality of communication areas by a plurality of repeaters.

The master 100 receives the data packet to be transmitted through the external communication network 400 and transmits the connected AC power to the plurality of slaves 200 by frequency modulation or switching control of the AC power.

To this end, the master 100 includes a master detection unit 120 that detects the start and end points of the setting section of the AC power, an external communication unit 130 that receives data from the external communication network 400, and the AC power set by switching A switching unit 140 that cuts off during the section, a master control unit 110 that controls to transmit data according to a command received through the external communication network 400, and a coupling unit 150 that couples data to AC power. may include

The master detection unit 120 detects the start and end of a section set based on the zero potential point of the AC power. Here, the zero crossing point may be calculated based on the peak point of the AC power source (eg, a sine wave of 50/60 Hz). The setting section and setting criteria will be described with reference to FIG. 5 .

5 is a graph illustrating an embodiment of the present invention. In FIG. 5, (a) is a graph showing AC power, (b) is a graph showing a zero potential point, (c) is a diagram showing a switching control section, (d) is a diagram in which data is coupled to be.

Referring to FIG. 5 , the master sensing unit 120 detects the start point and the end point of a section (time) set based on the zero potential point in the AC power of (a). Here, the set section is the first reference (t1) set to the left and right section (time) from the zero potential point, the second standard (t2) set to the left section from the zero potential point, and the second set to the right section based on the zero potential point It may be selected from any one of the three criteria (t3).

For example, if the section blocked by the first criterion (t1) is 2 msec, the master sets the carrier speed for 2 msec at low speed (eg 4 bit, 8 bit) or high speed (16 bit or higher) communication. can do. At this time, the corresponding section provides a stable communication environment because noise is not generated.

The switching unit 140 cuts off the AC power during a period set based on the zero potential point under the control of the master control unit 110 . For example, the switching unit 140, see Fig. 5 (c), the start point of the section set by at least one of the first reference (t1) to the third reference (t3) under the control of the master control unit 110 cut off the AC power, and turn on the AC power at the end point of the section.

When controlling the switching mode of the master controller 110 , the coupling unit 150 may transmit data to a section in which the AC power is cut off, referring to FIG. 5 ( d ). Alternatively, the coupling unit 150 couples the data to the AC power source (eg, sine wave) by the frequency modulation method of the AC power when the frequency modulation mode is controlled by the control of the master control unit 110 (see FIG. 1 c). can kill To this end, the coupling unit 150 may include a data transmission module (not shown) for transmitting data during a power-off section, and a frequency modulation module (not shown) for applying a frequency to AC power.

In the frequency modulation mode, a large amount of data can be quickly transmitted as a frequency is applied to an AC power source.

The switching control mode cuts off the voltage for a period set based on the zero potential point and transmits data in a stable communication environment without noise, so it is possible to transmit a long distance (eg, 1KM or more) compared to the frequency modulation mode.

The mixed mode proceeds in a manner in which a frequency modulation mode and a switching control mode are combined.

The frequency modulation mode can transmit large amounts of data quickly, but has a shortcoming in that the actual transmission distance is less than 100M. Therefore, when the communication method using the frequency modulation mode has a transmission distance of 100M or more, a repeater is added according to the transmittable distance.

Instead, in the switching control mode, data is transmitted in a stable state without noise because the power is cut off, so transmission of 1KM or more is possible.

Therefore, in the mixed mode, in order to take advantage of the advantages of the frequency modulation mode and the switching control mode, the switching control mode is switched to the switching control mode in an emergency such as a communication error while the frequency modulation mode is in progress, or, conversely, the switching from the switching control mode to the frequency modulation mode. characterized. In this case, the mode conversion may be performed according to a set condition.

The mode switching condition is set as one or more of whether the data capacity setting criteria such as update of the driving program of the load 300 are exceeded, communication error due to noise, or remote control command of the slave and the repeater and/or the load 300 It is possible.

That is, in the present invention, when the data capacity exceeds a set standard and fast transmission is required, the mode conversion is performed as a frequency modulation mode, and when data is transmitted accurately and far in a stable state, the mode conversion is performed as a switching control mode.

The repeater control mode may include a process in which the master 100 calls and remotely controls set repeaters from among a plurality of slaves 200 connected through a power line, and checks whether the repeater is abnormal during the remote control process and resets it.

Here, the repeater control mode is a frequency modulation mode like the mixed mode. After checking the status of all repeaters, a plurality of repeaters are sequentially called in the switching control mode to directly control the repeater, and after releasing the error-detected repeater, it is reset to a new repeater.

For example, the first to Nth slaves 200 may be divided into a plurality of communication areas. For example, the first to fifth slave 200 is a communication area 1 for transmitting data directly from the master 100, and the 4th slave 200 and the 6th slave 200 are communication area 2 and 7 The slave 200 to the ninth slave 200 may be divided into a communication area 3, and the N-2 th slave 200 to the Nth slave 200 may be divided into an N communication area.

Among them, the fifth slave 200, the eighth slave 200, and the eleventh slave 200 are set as repeaters and when a call signal from the master 100 is received, a repeater (set as a repeater) in another communication area adjacent to the response at the same time The call signal of the master 100 is relayed to the slave 200).

Therefore, the master control unit 110 may call all the slaves 200 in the frequency modulation mode, and receive a response from all the slaves 200 for a set time to check whether the communication of all the slaves 200 is abnormal.

In this process, for example, if a response is not received from any one of the repeaters, it is switched to the repeater control mode and directly controls the corresponding repeater or calls the slave 200 in an adjacent position to reset the repeater and control it. .

The slave 200 includes a slave sensing unit 220 sensing a frequency modulation mode and a switching control mode, a slave receiving unit 230 receiving data from the master 100, and a slave sensing unit 220 according to a detection signal. It may include a slave controller 210 that controls, and a slave transmitter 240 that transmits data in a frequency modulation mode or a switching control mode under the control of the slave controller 210 .

The slave detection unit 220 detects whether the AC power is modulated by a cutoff section due to a switching control mode or a frequency modulation mode in the AC power. Here, the slave sensing unit 220 may detect the start point and the end point of the set section by the switching control mode, and output it to the slave control unit 210 .

The slave receiver 230 receives the signal from the master 100 , decodes it, extracts data, and outputs the data to the slave controller 210 .

The slave transmitter 240 transmits data to the master 100 in a frequency modulation mode or a switching control mode under the control of the slave controller 210 .

The slave controller 210 executes the load 300 according to the data received by the slave receiver 230 or resets a communication environment such as a signal gain according to a remote control command of the master. Here, the slave controller 210 controls the slave transmitter 240 according to the detection result of the slave detector 220 .

For example, when the switching control mode is detected in the AC power, the slave controller 210 drives the slave transmitter 240 to transmit data at the start point of the section in which the AC power is cut off, and ends data transmission at the end point.

The present invention includes such a configuration, and an embodiment of a power line communication method driven in a selective mode according to the present invention will be described below.

6 is a block diagram illustrating a power line communication method driven in a selective mode according to the present invention.

Referring to FIG. 6 , the present invention includes a step S100 of transmitting data in a frequency modulation mode, a step S200 of transmitting data during a section in which the power is cut off based on a zero potential point, and a frequency modulation mode according to a set mode conversion standard. It may include a step S300 of driving in a mixed mode in which the switching control mode is mixed, and a step S400 of driving in a repeater control mode in which the master 100 controls the repeater.

Step S100 is a step of coupling data by modulating the frequency of AC power in the master 100 and transmitting the data with a plurality of slaves 200 . Here, the master 100 controls the coupling unit 150 to transmit data in a frequency modulation mode when data having a capacity (eg, 1K Byte or more) greater than the set standard is received from the communication unit through the external communication network 400 . .

At this time, the slave 200 receives the data of the master 100 and then responds in the frequency modulation mode, receives it from the data receiver of the master 100 and checks whether data is transmitted.

Step S200 is a step of driving the switching control mode in which the master 100 cuts off the AC power for a set period and transmits data during the blocked period. Here, step S200 may include step S210 in which the master 100 transmits data from all the slaves 200 in bulk, and step S220 of requesting and receiving responses from the slaves 200 .

Among them, step S210 will be described with reference to FIG. 7 and step S220 will be described with reference to FIG. 8 .

7 is a flowchart illustrating step S210.

Referring to FIG. 7 , step S210 includes step S211 in which the master detection unit 120 detects the start of a setting section, step S212 in which the control unit controls the switching unit 140 to cut off AC power, and the control unit includes the coupling unit Step S213 of controlling 150 to transmit data, step S214 for detecting the end of the set section, and step S215 for stopping data transmission and turning on AC power when the end of the set section is detected.

Step S211 is a step in which the master control unit 110 receives a start detection signal of a set section from the master detection unit 120 . The master sensing unit 120 calculates the zero potential point through the peak point and period of the AC power (eg, a sine wave of 50/60 Hz), and the first reference (t1) to the third reference (t1) to the third reference ( t3), any one of the starting point detection signals is output to the master control unit 110 .

Step S212 is a step in which the master control unit 110 controls the switching unit to cut off the power from the start point to the end point of the set section. The switching unit 140, for example, cuts off the power for a time from the start point set on the left to the end point set on the right side based on the zero potential point according to the first criterion t1, or through the second criterion t2. The power can be cut off for the time from the start point to the end point (zero potential point) set on the left based on the zero potential point, or the power can be cut off for the time from the zero potential point (start point) to the right end point through the third criterion (t3). .

Preferably, the first criterion (t1) to the third criterion (t3) are selectively applied according to the data capacity.

Step S213 is a step in which the master control unit 110 controls the coupling unit 150 to transmit data during the period in which the power is cut off. The master control unit 110 controls the coupling unit 150 according to data received from the external communication network 400 or a command stored in the memory to transmit data. Therefore, the coupling unit 150 transmits data from the starting point where the power is cut off.

At this time, the master control unit 110 transmits data to all the slaves 200 collectively. Accordingly, all the slaves 200 transmit data simultaneously by the master control unit 110 , and the slaves 200 spaced apart from the master 100 by a predetermined distance or more receive data through a repeater relay.

Alternatively, the master 100 may sequentially call all the slaves 200 according to a set order (eg, distance order).

Step S214 is a step in which the master control unit 110 receives the end detection signal of the set section of the master detection unit 120 . The master detection unit 120 outputs to the master control unit 110 when the end of the setting section is sensed.

In step S215, the master control unit 110 receives the detection signal at the end of the set section from the master detection unit 120, controls the coupling unit 150 and the switching unit 140 to block data transmission, and energizes the AC power. is a step

This step S210 is characterized in that the master 100 transmits data to all the slaves 200 in a batch through the switching control mode, and relays the data through a repeater set to at least one of the plurality of slaves 200. It enables the control of the master 100 up to the slave 200 located at a long distance through the

Here, the above-described switching control for data transmission may be performed by repeated switching of the switching unit 140 instead of being performed only once, and as shown in FIG. 5 , the first to third standards t1 to t3 are mixed. can be applied.

Step S220 will be described with reference to FIG. 8 .

8 is a flowchart illustrating step S220.

Referring to FIG. 8 , step S220 is a step of requesting and receiving a response from each slave 200 in the switching control mode in the master 100 . To this end, step S220 includes step S221 in which the master control unit 110 receives a start detection signal of a set section, step S222 of cutting off AC power when the start section is detected, and step S223 of requesting and receiving a response from the slave 200 It may include a step S224 of detecting the end of the setting section, and a step S225 of turning on the AC power.

Step S221 is a step in which the master control unit 110 receives a start detection signal of a set section from the master detection unit 120 .

Step S222 is a step in which the master control unit 110 controls the switching unit 140 to cut off the AC power for a set section (time) from the start section of the section set based on the zero potential point.

In step S223 , the master control unit 110 controls the coupling unit 150 to transmit a response request signal to the slave 200 , and receives a response from the slave 200 through the data receiving unit 160 .

Here, the slave 200 detects the switching control mode, receives and executes data according to the corresponding mode, and transmits the data including the result to the master 100 .

That is, the slave 200, for example, detects the data transmitted in the section where the power is cut off by the switching control mode of the AC power of the master 100, executes a command according to the detected data, and displays the result It is transmitted to the master 100 in the section where the power is cut off.

The data receiving unit 160 of the master 100 receives responses from the slaves 200 and outputs them to the master control unit 110 .

Step S224 is a step in which the master control unit 110 receives the end detection signal of the set section from the master detection unit 120 .

Step S225 is a step in which the master control unit 110 receives the detection signal at the end of the set period and turns on the AC power. The master control unit 110 receives a response from each slave 200 through the switching control mode, analyzes the received response and switches to a repeater control mode to be described later to reset the repeater or the slave 200 through the external communication network 400 ) of the state information can be transmitted.

Step S300 will be described with reference to FIG. 9 . 9 is a flowchart illustrating step S300.

9, step S300 is a step S310 of receiving a remote control command through the external communication network 400, a step S320 of detecting a mode switching condition, and switching to and transmitting a switching control mode when the mode switching condition is met It includes a step S330, a step S340 of inquiring and resetting the state of the slave 200, and a step S350 of driving in a frequency modulation mode.

Step S310 is a step of driving the master 100 in the frequency modulation mode.

Step S320 is a step in which the master control unit 110 detects a mode change condition. The master control unit 110 is switched to the switching control mode when a remote control command received from the external communication network 400 or a communication abnormality (eg, noise state) is detected in the frequency modulation mode state.

The mode switching condition is, for example, the type of the slave 200 and/or the load 300, an emergency situation due to an abnormality in the communication line such as noise, or the reset or initialization of the slave 200 and/or the load 300 , can be determined according to the capacity of the data.

Step S330 is a step of switching to the switching control mode when the master control unit 110 corresponds to the mode switching condition.

Step S340 is a step in which the master control unit 110 transmits data during the set period blocked based on the zero potential point through step S330 and inquires the state of the slave 200 to reset the communication environment.

For example, in the case of communication abnormality, the master 100 switches from the frequency modulation mode to the switching control mode and inquires the state of the slave 200 to reset the signal gain or reset the communication baud rate to solve the cause of the communication abnormality.

Step S350 is a step in which the master control unit 110 switches to the frequency modulation mode and transmits data when the communication abnormality is resolved through step S340.

That is, the mixed mode proceeds by mixing the switching control mode and the frequency modulation mode according to the mode switching condition, and the mode switching condition is set to an emergency such as an abnormality in the slave 200 or communication abnormality, or an abnormality in the load 300 . can be Alternatively, the mode conversion condition may be set according to the type or capacity of data.

Step S400 is a step for remote control and/or resetting by calling existing repeaters in the master 100 as a repeater control mode, and preferably may be performed in conjunction with steps S220 and S300.

That is, in step S400, when all slaves 200 are called through steps S220 and S300, if there is no response from the slave 200 within a set time, it can be switched to the repeater control mode.

Alternatively, in step S400, it is also possible to call and control the repeater without prior progress of steps S220 and S300 according to the setting command of the master 100. This will be described with reference to FIG. 9 .

10 is a flowchart illustrating step S400.

Referring to FIG. 10 , step S400 includes step S410 driven in a switching control mode to cut off AC power during a setting period, step S420 for sequentially calling repeaters, step S430 for detecting whether the repeaters are abnormal, resetting the repeater and a step S440 of controlling the called repeater, and a step S450 of controlling the called repeater.

Step S410 is a step in which the master 100 is driven in the switching control mode. Here, the master control unit 110 controls the switching unit 140 to cut off the power at a starting point set based on the zero potential point.

Step S420 is a step in which the master 100 sequentially calls a plurality of repeaters.

Step S430 is a step in which the master 100 receives response signals from the repeaters and checks whether the repeaters can communicate. For example, when a response is received after calling the repeater of the previous number from the repeaters 1 to N, the master 100 calls the repeater of the next order to receive the response.

Step S440 is a step of resetting as a repeater by calling the slave 200 adjacent to the repeater in the corresponding order when a repeater that has not been called is detected during the call process of the repeater. And, after calling the reset repeater, the master 100 checks the normal operation and then calls the next repeater.

Step S450 is a step in which the master 100 receives a response from the repeater and remotely controls the corresponding repeater. Here, steps S430 and S450 may be performed simultaneously. That is, when the response is received, the master 100 may remotely control the corresponding repeater and then call the next repeater.

And the master 100 ends the communication when the call and control of the repeater is completed.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. is within the scope of the right.

100: master
110: master control unit
120: master detection unit
130: external communication unit
140: switching unit
150: coupling part
160: data receiving unit
200: slave
210: slave control unit
220: slave sensing unit
230: slave receiver
240: slave transmitter
300: load
400: external communication network

Claims (8)

a master 100 for transmitting and receiving data through a power line;
at least one repeater relaying a signal of the master; and
a plurality of slaves 200 for receiving data from the master 100; including,
Master 100 is
a frequency modulation mode for transmitting data to a plurality of slaves 200 connected through a power line by modulating the frequency of the AC power; and
a switching control mode in which the AC power is cut off during a set period, and data is transmitted and received to the slave 200 during the cut off period; driven by at least one of
Master 100 is
A master detection unit 120 for detecting the start point and the end point of the section set in AC power;
a switching unit 140 for switching AC power to cut off power during a set period;
a coupling unit 150 for transmitting data to the slaves 200; and
a master control unit 110 for controlling the switching unit 140 and the coupling unit 150 to transmit data in a frequency modulation mode or a switching control mode according to a set mode switching condition; including,
Mode switching conditions
being set to at least one of data capacity, communication abnormality, and a slave control command; Powerline communication system driven in selective mode, characterized in that.
delete The method according to claim 1, wherein the set interval is
a first criterion set as the time from the starting point set at the left of the zero potential point to the end point set at the right of the zero potential point;
a second criterion set as the time from the starting point set on the left of the zero potential point to the zero potential point; and
a third criterion set as the time from the start point set as the zero potential point to the end point set at the right side of the zero potential point; Powerline communication system driven in a selective mode, characterized in that at least one of.
The method according to claim 1, Slave 200
a slave detection unit 220 for detecting a frequency modulation mode and a switching control mode;
a slave transmitter 240 for transmitting data according to a detection signal in a frequency modulation mode or a switching control mode of the slave detector 220; and
a slave control unit 210 for controlling the slave transmission unit 240 according to the detection signal of the slave sensing unit 220; including,
The slave transmitter 240 is
transmitting data during a period in which power is cut off in the switching control mode; Powerline communication system driven in selective mode, characterized in that.
a) the master 100 modulates the frequency of the AC power and couples the data to drive in a frequency modulation mode for transmitting and receiving data to a plurality of slaves 200 connected through a power line;
b) the master 100 switches the AC power to cut off from the start point to the end point of a set section, and drives in a switching control mode in which data is transmitted to a plurality of slaves 200 during the cut off section; and
c) driving the master 100 in a mixed mode for transmitting and receiving data to and from a plurality of slaves 200 by switching to a switching control mode according to a mode switching condition set while transmitting data in a frequency modulation mode; Powerline communication method driven in a selective mode comprising at least one of.
The method according to claim 5, wherein the mode conversion condition in step c) is
Data capacity, communication abnormality detection, including one or more of a remote control command of the slave 200; Powerline communication method driven in a selective mode, characterized in that.
The method according to claim 6, c) step
c-1) transmitting and receiving data from the master 100 to the plurality of slaves 200 in a frequency modulation mode;
c-2) when the master 100 detects a mode switching condition, switching from the frequency modulation mode to the switching control mode to cut off the power during a set period, and transmitting data during the blocked period;
c-3) receiving a response from the slave 200 in the master 100, inquiring the status of the slave 200, and controlling the slave 200 according to the status inquiry result; and
c-4) a step of switching from the switching control mode to the frequency modulation mode after the control of the slave 200 in the master 100; a power line communication method driven in a selective mode comprising a.
The method according to claim 6 or 7, wherein the plurality of slaves 200 are set as at least one repeater that relays the communication of the master 100,
The master 100 calls all the slaves 200 in the frequency modulation mode, and when communication abnormality is detected during the call, the master 100 switches to the switching control mode to sequentially call and control the repeaters; Powerline communication method driven in a selective mode further comprising a.

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