KR101059701B1 - Measuring system matching device and matching method for measuring power line communication signal - Google Patents

Abstract

The present invention provides a measurement system matching device and method for easily configuring an accurate measurement system in measuring equipment performance and communication characteristics for a line in power line communication (PLC). For this purpose, in particular, the power insertion terminal 11 can be inserted into the AC power outlet; In order to receive the power line communication signal and the power signal from the power supply insertion terminal 11, the primary coil winding 25 wound on a predetermined core 22, the secondary coil winding inductively coupled to the primary coil winding 25 ( 26 and the primary coil winding 25 and the secondary coil winding 26 are each provided with a condenser 23, 24 for attenuating the power signal in accordance with the frequency band pass of the power line communication signal by a series connection. A transformer 21 for converting a power signal; And a receiving impedance element 31 connected to the secondary coil winding 25 to impart a receiving impedance to the converted power line communication signal. The measurement system matching device for measuring power line communication signal is disclosed.

Power Line Communications (PLC), Broadband Communications, Transformers

Description

Measuring system matching device and method for measuring power line communication signal {APPARATUS AND METHOD MATCHING MEASURMENT SYSTEM FOR MONITORING POWER LINE COMMUNICATIONS SIGNAL}

The present invention relates to a measurement system matching device and a matching method for measuring power line communication signals. More particularly, the present invention relates to a measuring system matching device and a matching method for measuring power line communication signals to easily configure an accurate measuring system when measuring the performance and power characteristics of power line communication equipment.

Power Line Communications (PLC) is a technology for communicating high-frequency signals superimposed on a power line made for the purpose of transmitting electrical energy, and is classified into narrow-band power line communication and broadband power line communication according to the frequency band used.

Narrowband power line communication is a technology that provides communication speed of several kbps using 9 kHz to 450 kHz band and provides low speed data service such as control signal and interphone (voice). It is called. Broadband power line communication is a technology that enables communication speeds of several Mbps to 100 Mbps using the 1.7 MHz to 30 MHz band and provides the transmission service of voice, data, and multimedia signals. Say communication.

In fact, since PLCs communicate power lines through a medium, they are more difficult to implement than data transmission using communication cables or optical fibers. In particular, it is difficult to overcome special circumstances such as high load and interference, noise, impedance change and signal attenuation, and to transmit data through limited transmission power. Noise generated through power lines includes noise generated asynchronously such as electric motors, harmonic noise generated at 60 kHz integer frequency, and independent impulse noise generated when the electronic device is switched on or off. exist. As such, monitoring through power line communication signal measurement is necessary to understand the poor channel environment and channel characteristics of the PLC.

1 is a perspective view schematically showing a conventional power line communication signal measuring apparatus. Referring to FIG. Coupling was achieved with the instrument 102 of the signal. In this method, the measurement of the measuring system is cumbersome because the work of removing the covering of the power line 103 to separate one line and penetrating it to the sensor is cumbersome. In addition, it was difficult to estimate the exact coupling amount of the signal between the penetrated wire and the sensor, and the measurement rate was difficult because the coupling ratio of the signal was very small. Therefore, there is a need for a device that can easily configure a measurement system and ensure accuracy in measuring power line communication signals.

Accordingly, the present invention has been made in view of the above needs, and the first object of the present invention is to facilitate the construction of a measurement system for measuring a power line communication signal and to enable accurate measurement with a small loss when combining communication signals. To provide a measuring system matching device and a matching method for measuring power line communication signals.

The second object of the present invention is a measuring system matching device and a matching method for measuring power line communication signals to improve the measuring range and precision in line quality measurement and various signal measurement by providing a means of transmitting an accurate reference signal together with a receiving function. To provide.

It is a third object of the present invention to provide a measurement system matching device and a matching method for measuring power line communication signals to enable small size and light weight, and to facilitate handling and transportation.

The object of the present invention as described above is a power insertion terminal 11 which can be inserted into an AC power outlet; In order to receive the power line communication signal and the power signal from the power supply insertion terminal 11, the primary coil winding 25 wound on a predetermined core 22, the secondary coil winding inductively coupled to the primary coil winding 25 ( 26 and the primary coil winding 25 and the secondary coil winding 26 are each provided with a condenser 23, 24 for attenuating the power signal in accordance with the frequency band pass of the power line communication signal by a series connection. A transformer 21 for converting a power signal; And a reception impedance element 31 connected to the secondary coil winding 25 to impart a reception impedance to the converted power line communication signal. The measurement impedance matching device for measuring the power line communication signal may be achieved. have.

In addition, the AC power outlet preferably has a 220 Vrms terminal voltage.

The core 22 may be in the form of a toroid.

The frequency band of the power line communication signal is preferably a broadband of 1.7 to 30 MHz.

Measuring system matching device for measuring the power line communication signal is connected to the transformer 21, the inductor 82 for blocking the high frequency to pass the converted power signal; A power supply rectifying circuit 81 connected in series with the inductor 82 to supply active element power; And a receiving calibration amplifier 51 connected to the receiving impedance element 31 and receiving a power line communication signal converted based on the supplied active element power and outputting a gain-adjusted first output signal. Do.

In addition, the measurement system matching device for measuring the power line communication signal is a signal detector which is branched between the receiving impedance element 31 and the receiving calibration amplifier 51 and detects the converted power line communication signal to provide a trigger signal to a predetermined external measurement system. 61); more preferably.

The measurement system matching device for measuring the power line communication signal is further provided with a mode switching switch 41 including a transmitting terminal and a receiving terminal for switching the transmission and reception measurement mode between the transformer 21 and the reception impedance element 31. A transmission calibration amplifier 74 which receives a predetermined reference signal transmitted from an external measurement system and outputs a gain-controlled second output signal; And a transmission impedance element 75 connected between the transmission terminal and the transmission calibration amplifier 74 to impart a transmission impedance to the second output signal.

The reference signal may be a signal transmitted for line quality measurement of a power line.

The measurement system matching device for measuring power line communication signals includes a transformer 21, an inductor 82, a power supply rectifier circuit 81, a receive impedance element 31, a receive correction amplifier 51, a transmit impedance element 75, and a transmit calibration element. An enclosure (1) having an amplifier (74) therein and having at least one coaxial connector for transmitting and receiving a predetermined signal with an external measuring system on one surface thereof; And an upper cover 2 formed so that one end of the power insertion terminal 11 protrudes to the outside and the other end is connected to the primary coil winding 25 therein, and which is coupled to the outer circumferential surface of the housing 1. It is preferable.

Mode switching switch is preferably formed to protrude to the outside of the housing (1) to enable the user operation for switching the transmission and reception measurement mode.

The coaxial connector preferably includes a reception measurement coaxial connector 71 connecting the reception calibration amplifier 51 and an external measurement system and a transmission coaxial connector 73 connecting the transmission calibration amplifier 74 and the external measurement system.

The coaxial connector preferably includes a trigger coaxial connector that delivers a trigger signal to an external measurement system.

The upper cover 2 preferably further includes a ground terminal formed on one surface to be groundable.

On the other hand, an object of the present invention is another category, the power line communication signal from the AC power outlet and the power signal is transmitted to the primary coil winding 25 of the transformer 21 through the power insertion terminal 11 (S100); A power line communication signal and a power signal are induced and converted into the secondary coil winding 26 (S110); Applying the impedance from the received impedance element 31 to the converted power line communication signal to match the impedance (S120); Extracting the converted power signal by passing the converted power signal through the inductor 82 (S130); Supplying the extracted power signal to the active element power through the power rectifier circuit 81 (S140); Converting the power line communication signal into a receiving calibration amplifier 51 and outputting a gain-adjusted first output signal (S150); And transmitting the first output signal to an external measurement system through the coaxial connector 71 for receiving measurement (S160). The method may also be achieved by a measurement system matching method for measuring a power line communication signal.

In addition, an object of the present invention is a step of transmitting a predetermined reference signal from a predetermined external transmitter to the transmission calibration amplifier 74 through the transmission coaxial connector 73 (S200); A reference signal is input to the transmission calibration amplifier 74 and output as a gain-controlled second output signal (S210); A second output signal is provided with an impedance from the transmission impedance element 75 to match the impedance (S220); Transmitting the second output signal to the secondary coil winding 26 through a transmitting terminal (S230); A second output signal is induced and converted from the secondary coil winding 26 to the primary coil winding 25 (S240); And outputting the converted second output signal to the power line through the power insertion terminal 11 (S250). The method may also be achieved by a measurement system matching method for measuring a power line communication signal.

According to a preferred embodiment of the present invention as described above, it is easy to configure a power line communication measuring system as compared to the existing technology, there is an effect that the measurement is easy because there is little loss when combining communication signals.

In addition, the correct amount of coupling of the signal can be corrected, enabling accurate power line communication signal measurement.

In addition to providing a reception function, a means of transmitting an accurate reference signal has an effect of improving measurement range and precision in line quality measurement and various signal measurements.

In addition, it is possible to implement small size and light weight, which is easy to handle and transport.

< Example >

Figure 2 is a schematic diagram showing the overall configuration of an embodiment according to the present invention. Detailed configuration will be described below with reference to FIG. 2.

The power insertion terminal 11 is a terminal inserted into an AC power outlet and the ground terminal 12 provides a conventional ground connection between the power line and an embodiment according to the present invention.

The transformer 21 converts a power signal and a power line communication signal input from the power insertion terminal 11 and transfers the power signal to another configuration such as the reception impedance element 31. In addition, the transformer 21 serves as a filter to block low frequencies of a power signal having a normal 60 Hz. To this end, it has a configuration such as the core 22, the primary side capacitor 23 and the secondary side capacitor 24, which will be described in detail in FIG.

The receiving impedance element 31 may be composed of a combination of passive elements for impedance matching, and imposes impedance on the converted power line communication signal and the converted power signal.

The transmission / reception measurement mode changeover switch 41 is a switch for switching the signal transmission path to operate in the signal reception mode or the signal transmission mode. Therefore, it includes a transmitting terminal (not shown) and a receiving terminal (not shown). The transmitting terminal connects the secondary coil winding 26 of the transformer 21 and the receiving calibration amplifier 51, and the receiving terminal is the secondary coil winding 26 of the transformer 21 and the transmitting calibration amplifier 74. Connect it.

The reception calibration amplifier 51 adjusts the gain as the ratio of the output to the input to correct the level deviation of the received signal such as the performance deviation of each element. It is connected to the coaxial connector 71 for receiving measurement and outputs a first output signal to an external measuring system (not shown).

The signal detector 61 is branched between the receiving impedance element 31 and the receiving calibration amplifier 51, and receives the attenuated power signal and the converted power line communication signal to detect an unamplified power line communication signal. This allows trigger signals to be provided to external measurement systems to capture irregular or bursty signals.

The coaxial connector 71 for reception measurement, the coaxial connector 72 for triggering, and the coaxial connector 73 for transmission use a Bayonet Neil-Concelman (BNC) connector. The coaxial connector 71 for receiving measurement transmits the receiving calibration amplifier 51 and an external measuring system, the coaxial connector 72 for triggering transmits the signal detector 61 and the external measuring system, and the coaxial connector 73 for transmitting transmits the signal. The calibration amplifier 74 and an external signal oscillator (not shown) are connected.

The transmission calibration amplifier 74 receives a reference signal generated from an external signal oscillator (not shown) and serves to correct a deviation generated from the embodiment according to the present invention.

The transmit impedance element 75 may be composed of a combination of passive elements for impedance matching and imposes a transmit impedance on a second output signal output from the transmit calibration amplifier 74.

The power rectifier circuit 81 generates DC power to be supplied to the active element and supplies active element power to the receiving calibration amplifier 51 and the transmission calibration amplifier 74 which require it. The high frequency cut-off inductor 82 connected in series with the power rectifier circuit 81 is configured to cut a high frequency to pass only a power signal.

The internal wiring lead 91 is a configuration required for signal transmission of an internal circuit by connecting each element or each component.

3 is a block diagram showing the structure of the transformer 21 and the peripheral elements of one embodiment according to the present invention. Referring to FIG. 3, the transformer 21 is a core 22, a primary coil winding 25, a secondary coil winding 26, a primary side capacitor 23, and a secondary side capacitor (in order to cut low frequency as a filter). 24).

The core 22 uses a toroidal core as a core 22 (eg, a ferrite core) made of a material having good high frequency characteristics.

The primary coil winding 25 winds as few windings on the core 22 to pass the signal in the high frequency band with very little loss.

In addition, the primary coil winding 25 has a small number of windings, so the inductance is small. In order to block an overcurrent induced in the secondary coil winding 26 due to the primary coil winding 25, the secondary capacitor 24 has a small capacity. Use a capacitor.

The signal conversion by the transformer 21 attenuates the AC power induced in the secondary coil winding 26 to the required level for the power supply of the receiving calibration amplifier 51 and the transmission calibration amplifier 74, which are active elements, but completely shuts off. It doesn't work. To this end, the transformer 21 is configured by appropriately adjusting the number of turns of the primary coil winding 25 and the capacity of the secondary capacitor 24.

The inductor 82 is connected in series with the power supply rectifier circuit 81 using an inductor 82 for high frequency interruption in order to prevent loss of a power line communication signal having a high frequency component.

The power rectifier circuit 81 and the mode switching switch 41 are as described above with reference to FIG. 2.

Figure 4a is a front view showing a front of an embodiment according to the present invention, Figure 4b is a side view showing a side of an embodiment according to the present invention, Figure 4c is a rear view showing a back of an embodiment according to the present invention. That is, FIGS. 4A, 4B, and 4C illustrate an example of an external shape including all of the components of the present invention shown in FIG. 2.

As shown in FIG. 4A, the power supply insertion terminal 11 and the ground terminal 12 are positioned at the front center portion and the front lower portion, respectively, in the same manner as the general plug. Therefore, it can be inserted into a general AC power outlet. The front mode switch mode 41 is protruded to the outside, the user can switch the transmission and reception measurement mode with a simple operation.

And as shown in Figure 4b, the side has a side length similar to the diameter of the front. Moreover, the coaxial connector 71 for receiving measurement which is a coaxial connector, and the coaxial connector 72 for a trigger protrude outside. The same applies to the coaxial connector 73 for transmission not shown in FIG. 4B. Referring to FIG. 4C, three coaxial connectors described in FIG. 4B are spaced apart from each other.

Figure 5 is an exploded perspective view showing a state in which the upper cover 2, the housing 1 and the core 22 is disassembled in one embodiment according to the present invention. For the purpose of understanding the present invention, only the top cover 2, the housing 1, and the core 22 are simply illustrated, and other components are omitted. . Each component has been described above, but the upper cover 2 and the housing 1 may be molded of high density polyethylene (HDPE) or the like. In the embodiment according to the present invention is divided into the upper cover (2) and the enclosure (1) for mounting the internal configuration is only one example and may be implemented in other shapes and sizes.

For measuring power line communication signals coordination  Method>

6 is a flowchart illustrating a measurement system matching process for measuring power line communication signals in a reception mode according to an embodiment of the present invention. As shown in FIG. 6, the power line communication signal and the power signal are transmitted from the AC power outlet to the primary coil winding 25 of the transformer 21 through the power insertion terminal 11 (S100). ). In addition, the power line communication signal and the power signal are induced in the secondary coil winding 26 due to electromagnetic induction, thereby converting voltage and current (S110).

The converted power line communication signal is provided with an impedance from the reception impedance element 31 to perform impedance matching (S120).

The converted power signal passes through the high frequency cut-off inductor 82 to extract the converted power signal (S130). The extracted power signal is used as an active element power source through the power rectifier circuit 81 (S140). That is, it is supplied to the power supply of the receiving calibration amplifier 51 which is an active element.

Meanwhile, the converted power line communication signal is input to the reception calibration amplifier 51 and outputs a gain-adjusted first output signal (S150). Subsequently, the first output signal is transmitted to the external measurement system through the coaxial connector 71 for receiving measurement (S160). In this way, the external measurement system measures the power line communication signal as the first output signal (S170).

7 is a flowchart illustrating a measurement system matching process for measuring power line communication signals in a transmission mode according to an embodiment of the present invention. The predetermined reference signal is transmitted from the predetermined external transmitter to the transmission calibration amplifier 74 through the coaxial connector 73 for transmission (S200).

Next, the reference signal is input to the transmission calibration amplifier 74 and output as a gain-controlled second output signal (S210). After that, the second output signal is given an impedance from the transmission impedance element 75 to perform impedance matching (S220), and the second output signal is transmitted to the secondary coil winding 26 through the transmission terminal (S230). .

Subsequently, the second output signal is induced from the secondary coil winding 26 to the primary coil winding 25 to be converted (S240), and the converted second output signal is output to the power line through the power insertion terminal 11. It becomes (S250). In this way, it becomes a useful means in the external measuring system for measuring the line quality of the power line or measuring various signals (S260). In other words, the signal may be analyzed or monitored by a spectrum analyzer, which may be a component of an external measurement system.

1 is a perspective view schematically showing a conventional power line communication signal measuring apparatus,

2 is a schematic view showing the overall configuration of an embodiment according to the present invention;

3 is a diagram showing the structure of the transformer 21 and the peripheral elements in one embodiment according to the present invention,

Figure 4a is a front view showing the front of an embodiment according to the present invention,

Figure 4b is a side view showing the side of an embodiment according to the present invention,

Figure 4c is a rear view showing the back of an embodiment according to the present invention,

Figure 5 is an exploded perspective view showing a state in which the upper cover 2, the housing 1 and the core 22 is disassembled in one embodiment according to the present invention,

6 is a flowchart illustrating a measurement system matching process for measuring power line communication signals in a reception mode according to an embodiment of the present invention;

7 is a flowchart illustrating a measurement system matching process for measuring power line communication signals in a transmission mode according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: enclosure 2: top cover

11: power insertion terminal 12: ground terminal

21: Transformer 22: Core

23: primary capacitor 24: secondary capacitor

25: primary coil winding 26: secondary coil winding

31: receiving impedance element

41: mode changeover switch

51: receive calibration amplifier

61: signal detector

71: Coaxial connector for reception measurement

72: coaxial connector for trigger

73: coaxial connector for transmission

74: transmit calibration amplifier

75: transmit impedance element

81: power supply rectifier circuit 82: inductor

91: lead wire for internal connection

101: toroidal sensor 102: instrument 103: power line

Claims (15)

A power insertion terminal 11 insertable into an AC power outlet having a 220Vrms terminal voltage; Primary coil winding 25 wound around a toroidal core 22 to receive power line communication signals and power signals of 1.7 to 30 MHz from the power insertion terminal 11, and the primary coil winding 25. A secondary connection of the secondary coil winding 26 and the primary coil winding 25 and the secondary coil winding 26 inductively coupled to A transformer (21) provided with condensers (23, 24) to convert the power line communication signal and the power signal; and And a reception impedance element 31 connected to the secondary coil winding 25 to impart a reception impedance to the converted power line communication signal. An inductor (82) connected to the transformer (21) for cutting high frequency to pass the converted power signal; A power rectifier circuit 81 connected in series with the inductor 82 to supply active element power; A reception calibration amplifier (51) connected to the reception impedance element (31) and receiving the converted power line communication signal based on the supplied active element power and outputting a gain-adjusted first output signal; A signal detector (61) for branching between the receiving impedance element (31) and the receiving calibration amplifier (51) and detecting the converted power line communication signal to provide a trigger signal to a predetermined external measurement system; A mode switching switch (41) including a transmitting terminal and a receiving terminal for switching between a transmission and reception measurement mode between the transformer (21) and the reception impedance element (31); A transmission calibration amplifier 74 which receives a reference signal transmitted from an external measuring system for measuring line quality of the power line and outputs a gain-adjusted second output signal; And A measurement impedance matching device for measuring power line communication signals, comprising: a transmission impedance element 75 connected between the transmission terminal and the transmission calibration amplifier 74 and providing a transmission impedance to the second output signal. . delete delete delete delete delete delete delete The method of claim 1, The transformer 21, the inductor 82, the power rectifier circuit 81, the reception impedance element 31, the reception calibration amplifier 51, the transmission impedance element 75, and the transmission calibration amplifier 74. (1) including the inside and having at least one coaxial connector for transmitting and receiving a predetermined signal with the external measuring system on one surface; And One end of the power insertion terminal 11 protrudes to the outside and the other end is formed to be connected to the primary coil winding 25 therein, and an upper cover 2 capable of coupling to the outer peripheral surface of the opening of the enclosure 1; Measuring system matching device for power line communication signal measurement, comprising. The method of claim 9, The mode switching switch is a measurement system matching device for measuring the power line communication signal, characterized in that protruding to the outside of the housing (1) to enable a user operation for switching the transmission and reception measurement mode. The method of claim 9, The coaxial connector, A coaxial connector 71 for receiving measurement connecting the receiving calibration amplifier 51 and the external measuring system; And And a transmission coaxial connector (73) for connecting the transmission calibration amplifier (74) and the external measurement system. The method of claim 9, And the coaxial connector includes a trigger coaxial connector for transmitting the trigger signal to an external measurement system. The method of claim 9, The upper cover (2) further comprises a grounding terminal formed on one surface so as to be grounded measuring system matching device for measuring power line communication signals. Transmitting the power line communication signal and the power signal from the AC power outlet to the primary coil winding 25 of the transformer 21 through the power insertion terminal 11 (S100); The power line communication signal and the power signal are induced and converted into a secondary coil winding (26) (S110); Applying an impedance from the received impedance element 31 to the converted power line communication signal to match an impedance (S120); Extracting the converted power signal by passing the converted power signal through an inductor (S130); Supplying the extracted power signal to an active element power source through a power rectifier circuit 81 (S140); The converted power line communication signal is input to the reception calibration amplifier 51 to output a gain-adjusted first output signal (S150); And And transmitting (S160) the first output signal to an external measurement system through a coaxial connector for receiving measurement (S160). Transmitting a predetermined reference signal from a predetermined external transmitter to the transmission calibration amplifier 74 through the coaxial connector 73 for transmission (S200); Outputting the reference signal as a gain-adjusted second output signal to the transmission calibration amplifier (74) (S210); The second output signal is provided with an impedance from a transmission impedance element (75) to match an impedance (S220); Transmitting the second output signal to the secondary coil winding (26) through a transmitting terminal (S230); The second output signal is induced and converted from the secondary coil winding 26 to the primary coil winding 25 (S240); and And a step (S250) of outputting the converted second output signal to a power line through a power insertion terminal (11).

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