KR101748793B1 - Apparatus for power line communication including master and slave - Google Patents

Abstract

A power line communication device including a master and a slave according to an embodiment of the present invention includes a master power source for supplying DC power to a slave side through a power line connected between a master and a slave to supply power and transmit / And a second section for interrupting the supply of the DC power to the slave side is periodically repeated so that the DC power is supplied to the slave side, And a second switch for switching the supply of the DC power to the slave side in correspondence with the digital signal of the first data signal to be transmitted to the slave side in the first section, And controls the switching of the slave switching unit to switch the connection of the power source Master controller; master containing; And a slave power supply unit for supplying a slave power supply by using a DC power supplied from a master side; a master switching unit for switching connection of a DC power supplied to the master side; And controls the driving of the load connected to the slave side according to the data signal so that the supply and cutoff of the DC power supply to the master side in the second section corresponds to the digital signal of the second data signal to be transmitted to the master side, And a slave controller for controlling the switching of the slave switching unit to switch the connection of the DC power supplied to the master side using the power of the power supply unit.

Description

[0001] APPARATUS FOR POWER LINE COMMUNICATION INCLUDING MASTER AND SLAVE [0002]

The present invention relates to a power line communication apparatus including a master and a slave, using both a period during which the master supplies DC power to the slave and a period during which the master supplies the DC power to the slave.

In the prior art, a power line for transmitting power between a master and a slave and a communication line for transmitting data are separately provided. For example, in an automation apparatus, a robot, and the like, a motor widely uses an actuator. Since these devices use multiple motors, the number of separate signal lines for constituting the closed-loop control system of the motor is increased, which causes a problem in downsizing the device.

In addition, when the communication line needs to be installed over a long distance, various errors occur as the communication distance becomes distant, and noise interference occurs between the communication line and the power line.

In addition, there is a problem that labor and material costs are increased in order to establish a communication line separately.

In addition, when a communication error occurs, it is not easy to determine the cause, and it is not possible to know where the error occurred.

In addition, since it is necessary to check the transmission line and communication line, maintenance is difficult and maintenance cost is high.

SUMMARY OF THE INVENTION The present invention is conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for transmitting power and data between a master and a slave using a power line communication method, SUMMARY OF THE INVENTION It is an object of the present invention to provide a power line communication device including a slave.

 Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

A power line communication apparatus including a master and a slave according to an embodiment of the present invention includes a master power supply unit for supplying a DC power to a slave side through a power line connected between a master and a slave, And a second section for interrupting the supply of the DC power to the slave side is periodically repeated so that the DC power is supplied to the slave side, A first switching unit for switching a connection between the first switching unit and the second switching unit so that supply and cutoff of the DC power supply to the slave side in the first section corresponds to a digital signal of the first data signal to be transmitted to the slave side, The switching of the slave switching unit to switch the connection of the slave switching unit Master containing; site controller; And a slave power supply unit for supplying a slave power supply by using a DC power supplied from a master side; a master switching unit for switching connection of a DC power supplied to the master side; And controls the driving of the load connected to the slave side according to the data signal so that the supply and cutoff of the DC power supply to the master side in the second section corresponds to the digital signal of the second data signal to be transmitted to the master side, And a slave controller for controlling the switching of the master switching unit to switch the connection of the DC power supplied to the master side using the power of the power supply unit.

Wherein the first section includes N sections and each of the N sections includes an X section in which the DC power is always supplied to the slave side for stable power supply to the slave side, And the master control unit controls the supply and cutoff of the DC power to the Y sections included in the N sections by the digital signal of the first data signal to be transmitted to the slave side The switching of the master switching unit can be controlled so as to switch the connection of the DC power supplied to the slave side.

The second section includes N sections, and each of the N sections includes an R section in which DC power is supplied to the master side at all times in order to match the rule with the X section, and an R section used to represent the second data signal as a digital signal. And the slave control unit supplies the DC power to the master side so that the supply and cutoff of the DC power supply to the T sections included in each of the N sections corresponds to the digital signal of the second data signal to be transmitted to the master side The switching of the slave switching unit can be controlled so as to switch the connection of the DC power source.

The size of the DC power source included in the R section and the T section may be smaller than the size of the DC power source included in the X section and the Y section.

According to the disclosed invention, the first data can be transmitted from the master to the slave in the first section, and the second data can be transmitted from the slave to the master in the second section, so that the master and the slave can perform bidirectional Communication can be performed. Therefore, a larger amount of data can be transmitted and received in two directions within a short period of time.

Also, DC power is always supplied to the slave side in the X section so that power can be stably supplied during the first section, so that the power can be supplied stably while supplying the data signal.

In addition, since data is transmitted and received using a power line communication method, there is no need to separately install a communication line, thereby reducing cost and labor cost.

In addition, it is easy to identify the cause of failure in case of failure, and it is easy to maintain and reduce the maintenance cost.

1 is a diagram for explaining a power line communication apparatus including a master and a slave according to an embodiment of the present invention.
2 and 3 are diagrams for explaining a data transmission method of a power line communication apparatus including a master and a slave according to an embodiment of the present invention.

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

1 is a diagram for explaining a power line communication apparatus including a master and a slave according to an embodiment of the present invention.

Referring to FIG. 1, a powerline communication device 100 including a master and a slave includes a master 110 and a slave 120. The master 110 and the slaves 120 can supply power and transmit and receive data using a power line communication scheme.

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The master 110 includes a master power supply unit 111, a master switching unit 112, and a master control unit 113.

The master power supply unit 111 is connected between the master 110 and the slaves 120 to supply DC power to the slaves via a power line that supplies power and transmits and receives data signals. For example, the DC power source may have a voltage of 24V.

The master switching unit 112 is connected to the slave side so that the first section in which DC power is supplied to the slave side and the second section in which the DC power is not supplied to the slave side are periodically repeated, Lt; / RTI > For example, the master switching unit 112 can change the DC power source of 24V to a pulse voltage having a constant period through on / off switching.

The master control section 113 controls the slave side to switch the connection of the DC power supplied to the slave side so that the supply and cutoff of the DC power supply to the slave side in the first section corresponds to the digital signal of the first data signal to be transmitted to the slave side, The switching of the EVEN switching unit 112 can be controlled. In this way, the master 110 can transmit the first data signal to be transmitted to the slave side in the first section and supply the power to the slave side.

For example, the first section includes N sections, and each of the N sections is divided into an X section in which the DC power is always supplied to the slave side for stable power supply to the slave side, And a Y section used to represent the signal as a digital signal. The master control unit 113 controls the supply and cutoff of the DC power supply in the Y sections included in each of the N sections to correspond to the digital signal of the first data signal to be transmitted to the slave side, The switching of the slave switching unit 112 can be controlled so as to switch the connection of the slave switching unit 112.

A detailed description thereof will be given later with reference to FIG. 2 and FIG.

The slave 120 includes a slave power supply 121, a load 122, a slave switching unit 123, and a slave control unit 124.

The slave power supply unit 121 can supply power to the components included in the slave 120 using power supplied through the power line of the master 110. [

The load 122 is driven using the power supplied from the slave power supply 121. For example, the load 122 may include a motor or the like. Although not shown in the drawing, when the load 122 is a motor, a sensor (not shown) capable of sensing the driving environment of the motor may be further included.

The slave switching unit 123 may switch the connection of the DC power supplied to the master 110 side.

The slave control unit 124 can drive the load connected to the slave side according to the first data signal received via the power line. For example, when the first data signal is the drive control signal of the motor, the slave control unit 124 can control the driving of the motor (load) in accordance with the drive control signal of the motor.

The slave control unit 124 uses the power of the slave power supply unit 121 so as to correspond to the digital signal of the second data signal to be transmitted to the master side in the second period, The switching of the slave switching unit 123 can be controlled so as to switch the connection of the DC power supplied to the slave switching unit 123 side.

For example, the second section includes N sections, and each of the N sections includes an R section in which DC power is supplied to the master side at all times in order to match the rule with the X section, And may include a T interval used for rendering. The slave control unit 124 controls the supply of the DC power to the master side and the connection of the DC power supplied to the master side so that the supply and cutoff of the DC power supply to the T sections included in each of the N sections corresponds to the digital signal of the second data signal to be transmitted to the master side The switching of the slave switching unit 123 can be controlled.

Here, the size of the DC power source included in the R section and the T section may be smaller than the size of the DC power source included in the X section and the Y section.

A detailed description thereof will be given later with reference to FIG. 2 and FIG.

2 and 3 are diagrams for explaining a data transmission method of a power line communication apparatus including a master and a slave according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the master switching unit 112 periodically repeats a first period in which DC power is supplied to the slave side and a second period in which the DC power is not supplied to the slave side So that the connection of the DC power source supplied to the slave side can be switched. In this case, the first period and the second period may be included in one period.

FIG. 3 is an enlarged view of a portion corresponding to the first period in FIG.

Referring to FIGS. 1 and 3, the first section includes nine sections, and each of the nine sections is divided into an X section in which the DC power is supplied to the slave side at all times, And a Y section used to represent the first data signal as a digital signal. In the present embodiment, nine intervals are included in the first interval, but the number of intervals is not limited thereto.

The master controller 113 controls the connection of the DC power supplied to the slave side so that the supply and cutoff of the DC power supply in the Y sections included in each of the nine sections corresponds to the digital signal of the first data signal to be transmitted to the slave side The switching of the master switching unit 112 can be controlled.

For example, when the digital signal of the first data signal to be transmitted to the slave side is '000110001' based on FIG. 3, the master controller 113 controls the DC power source The switching of the master switching unit 112 can be controlled such that the supply and cutoff of the master switching unit 112 are driven in the order of 'blocking / blocking / blocking / supplying / supplying / blocking / blocking / blocking / Accordingly, the DC power is always supplied to the X section and the Y section is supplied and blocked in the order of 'block / block / block / supply / supply / block / block / block / supply'.

Accordingly, the slave controller 124 can determine the digital signal of the first data signal according to the supply and cutoff sequence existing in the Y section of the received signal of the first section. That is, the slave controller 124 determines that the digital signal of the first data signal is' 000110001 'based on the Y interval, and computes 49 ('32 + 16 + 1') corresponding to the digital signal have. Thus, the slave control unit 124 can calculate the letter or number corresponding to 49. [ For example, the slave unit control unit 124 can calculate the letter or number corresponding to 49 based on the ASCII code table.

In this way, the master 110 can transmit the first data signal in the first section, which is a section for supplying DC power to the slave side.

Also, the master 110 can always supply DC power to the slave side in the X section so that the power can be stably supplied during the first section, thereby supplying the data signal and supplying the power stably at the same time.

In the slave 120, when the digital signal of the second data signal to be transmitted to the master side is '001100001', the slave controller 124 controls the slave controller 120 to output the DC power of the slave section 120 in the T section included in each of the nine sections of the second section. It is possible to control the switching of the slave switching unit 123 such that the supply and the blocking are driven in the order of 'blocking / blocking / supplying / supplying / blocking / blocking / blocking / blocking / supplying'. Accordingly, the R section is always supplied with DC power, and the T section is supplied and blocked in the order of 'block / block / supply / supply / block / block / block / block / supply'.

Accordingly, the master control unit 113 can determine the digital signal of the second data signal according to the supply and cutoff sequence existing in the T section of the received signal of the second section. That is, the master control unit 113 determines that the digital signal of the second data signal is' 001100001 'based on the T section included in the second section, and determines that the value of 97 ('64 + 32 + 1' ) Can be calculated. Thus, the master control section 113 can calculate the letter or number corresponding to 97. For example, the master control section 113 can calculate the letter or number corresponding to 97 based on the ASCII code table.

As described above, the slave 120 can transmit the second data signal to the master 110 in the second section, which is a period in which DC power is not supplied to the slave side.

The power line communication apparatus including the master and the slave can transmit the first data from the master to the slave in the first section and the second data from the slave to the master in the second section, During the period, the master and slave can communicate in both directions. Thus, the power line communication device including the master and the slave can transmit / receive data in a short time because data can be transmitted / received in both a period for supplying the DC power and a section for interrupting the DC power.

The embodiments described may be constructed by selectively combining all or a part of each embodiment so that various modifications can be made.

It should also be noted that the embodiments are for explanation purposes only, and not for the purpose of limitation. In addition, it will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

110: Master
111: Master power supply
112: Master switching section
113:
120: Slave
121: Slave power supply
122: load
123: a slave switching unit
124: Slave controller

Claims (4)

A master power supply unit connected between the master and the slave to supply power to the slave side through power lines for transmitting and receiving data signals and a slave side; And a DC power source connected to the slave side is connected to the slave side so as to periodically repeat a second period in which the DC power is not supplied to the slave side, And a DC power supply for supplying a direct current power to the slave side in the first section so as to correspond to a digital signal of a first data signal to be transmitted to the slave side, Switching of the master switching unit to switch the connection of the power supply Master containing; a master controller which controls; And
A slave power supply unit for supplying a slave power supply using a DC power supplied from a master side, a load driven by a DC power supply supplied from the slave power supply unit, and a DC power supply connected to the master side Wherein the control unit controls the driving of a load connected to the slave side according to the first data signal received via the power line, and the supply and cutoff of the DC power to the master side in the second period is controlled by the master A slave control unit for controlling the switching of the slave switching unit to switch the connection of the DC power source supplied to the master side using the power of the slave power supply unit so as to correspond to the digital signal of the second data signal to be transmitted to the master side A master and a slave < RTI ID = 0.0 >≪ / RTI >
The method according to claim 1,
Wherein the first interval includes N intervals,
Each of the N intervals
And a Y section used for expressing the first data signal as a digital signal in order to stably supply power to the slave side, the X section being always supplied with the DC power at the slave side,
The master control unit,
To switch the connection of the DC power supplied to the slave side so that supply and cutoff of the DC power supply to the Y sections included in each of the N sections corresponds to the digital signal of the first data signal to be transmitted to the slave side And a master and a slave which controls switching of the master switching unit.
3. The method of claim 2,
Wherein the second section includes N periods,
Each of the N intervals
An R section in which the DC power is always supplied to the master side to match the X section and a T section used to express the second data signal as a digital signal,
Wherein the slave controller includes:
And a switching circuit for switching the connection of the DC power source supplied to the master side so that supply and cutoff of the DC power supply to the T sections included in each of the N sections corresponds to the digital signal of the second data signal to be transmitted to the master side, A power line communication device including a master and a slave for controlling switching of an eve switching part.
The method of claim 3,
Wherein the size of the DC power source included in the R section and the T section is smaller than the size of the DC power source included in the X section and the Y section.

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