CN115833876A - Signal receiving method and device - Google Patents

Abstract

The embodiment of the application discloses a signal receiving method and device, and for a first node including a single-phase power line communication module and a second node including the single-phase power line communication module in a network, the second node can be respectively connected with a plurality of first nodes through an L phase line, the L phase line comprises an A phase line, a B phase line and a C phase line, and the second node can receive single-phase carrier signals respectively sent by the first nodes, so that the second node can receive the single-phase carrier signals. Wherein the plurality of single-phase carrier signals include at least two of an a-phase single-phase carrier signal, a B-phase single-phase carrier signal, or a C-phase single-phase carrier signal. After the second node receives the single-phase carrier signals through the L-phase line, the single-phase carrier signals are converted to the phase line where the single-phase power line communication module is located, and therefore the single-phase power line communication module of the second node can receive complete carrier signals sent by the first node with different phases.

Description

Signal receiving method and device

The present application claims priority of chinese patent application No. 202111092265.5 entitled "method, apparatus and system for identifying connection relationship of user list connection", which was filed on 9/17/2021, and the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a signal receiving method and apparatus.

Background

With the rapid development of power enterprises and the arrival of the information era, the national power grid puts forward new requirements and standards for marketing of the power enterprises so as to realize the standardization of marketing management. The business distribution through platform makes it possible to meet higher requirements of customers and achieve better power supply service. The marketing and distribution through means that a power supply enterprise uses a client as a center, the corresponding professional work of each original management department is subjected to the processes of structure optimization, resource integration, system upgrading and the like, the marketing and distribution data sharing is utilized to complete the positioning of power grid faults and power failure ranges, and the cross-professional and cross-department services such as maintenance, marketing management and the like are achieved, so that the service operation efficiency is improved, the market operation capacity is improved, and the marketing performance is improved.

Wherein the marketing through network comprises a distribution network and a marketing network, as shown in fig. 1 a. Normally, three-phase balance is required inside a meter box in a marketing network, and meters inside the meter box need to be distributed on A, B and C phases respectively. However, since the communication module of the meter box incoming line node is coupled with one of the phases, for the other two phases, the communication module of the incoming line node can only receive the carrier signal on the N-phase line (zero line), so that the subsequent determination of the positions of the meters on the other two phases can only depend on the signal on the N-phase line, and the positions of the meters on the other two phases cannot be accurately identified.

Disclosure of Invention

The embodiment of the application provides a signal receiving method and a signal receiving device, which are used for acquiring a complete carrier signal and providing a reliable carrier signal for subsequent processing.

In a first aspect of embodiments of the present application, a signal receiving method is provided, where the method is applied to a second node, the second node is connected to multiple first nodes through an L-phase line and an N-phase line, the second node includes a single-phase power line communication module, the L-phase line includes an a-phase line, a B-phase line, and a C-phase line, and the method includes: receiving single-phase carrier signals sent by a plurality of first nodes, wherein the single-phase carrier signals comprise any two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal; and converting the plurality of single-phase carrier signals to the phase line of the single-phase power line communication module. In this implementation manner, after the second node receives the plurality of single-phase carrier signals through the L-phase line, the plurality of single-phase carrier signals are converted to the phase line where the single-phase power line communication module is located, so that the single-phase power line communication module of the second node can receive the complete carrier signal sent by the first node with different phases.

In one possible implementation manner, the converting the plurality of single-phase carrier signals to the phase line on which the single-phase power line communication module is located includes: and converting the single-phase carrier signals to a phase line where the single-phase power line communication module is located through a three-phase coupling circuit. In this implementation, the plurality of single-phase carrier signals received by the second node are coupled to the single-phase power communication module by the three-phase coupling circuit, so that the single-phase power communication module of the second node can receive the carrier signals on different phases.

In one possible implementation, the method further includes: and sending the carrier signal received by the single-phase power line communication module to a third node, wherein the carrier signal received by the single-phase power line communication module comprises a plurality of single-phase carrier signals, and the third node comprises a power line communication module.

In one possible implementation, the method further includes: for any single-phase carrier signal in the plurality of single-phase carrier signals, determining a first strength at which the single-phase carrier signal is received by the single-phase power line communication module, and sending the first strength of the single-phase carrier signal to a control device, so that the control device determines a parent node corresponding to a first node that sends the single-phase carrier signal based on the first strength of the single-phase carrier signal sent by the second node and the first strength of the single-phase carrier signal sent by the third node. In this implementation, the second node and the third node may send the first strength of the single-phase carrier signal received by the second node and the third node to the control device, so that the control device determines the parent node corresponding to the first node based on the signal strength received by each node.

In a possible implementation manner, the parent node of the first node is a node corresponding to the maximum first strength. In this implementation, when a certain node is closer to a second node, the transmission line through which the carrier signal passes is shorter, and the attenuation amount is smaller, so that the strength of the carrier signal received by the node is greater, and therefore, the node corresponding to the maximum strength is determined as the parent node of the first node.

In one possible implementation, the second node and the third node further include an impedance adjustment module, and the method further includes: when the impedance adjusting module of a target node is in a working state, determining a second strength of the single-phase carrier signal received by the single-phase power line communication module, and sending the second strength of the single-phase carrier signal to a control device, wherein the target node is the second node or the third node.

In one possible implementation, the parent node of the first node is determined by the control device according to a first strength and a second strength of the single-phase carrier signal.

In a second aspect of embodiments of the present application, there is provided a node, including: the system comprises a single-phase power line communication module and a three-phase coupling circuit; the three-phase coupling circuit is used for connecting a plurality of first nodes through L-phase lines, the L-phase lines comprise an A-phase line, a B-phase line and a C-phase line, and the plurality of first nodes are respectively connected with the nodes through one of the L-phase lines; the single-phase power line carrier communication module is used for receiving single-phase carrier line numbers sent by the plurality of first nodes through the three-phase coupling circuit, and the plurality of single-phase carrier signals comprise at least two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal.

In a possible implementation manner, the node further includes an impedance adjusting module, which is connected in parallel with the single-phase power line communication module, and is configured to adjust an impedance of the node.

In a possible implementation manner, the single-phase power line communication module is further configured to receive an adjustment instruction sent by a control device, and adjust the impedance of the impedance adjusting module according to the adjustment instruction, where the adjustment instruction is used to enable the impedance adjusting module.

In a possible implementation manner, the single-phase power line communication module is further configured to send the received single-phase carrier signals with different phases to a third node, where the third node includes the power line carrier communication module.

In a third aspect of embodiments of the present application, there is provided a signal receiving apparatus, where the apparatus is applied to a second node, the second node is connected to a plurality of first nodes through an L-phase line and an N-phase line, the second node includes a single-phase power line communication module, the L-phase line includes an a-phase line, a B-phase line, and a C-phase line, and the apparatus includes: the receiving unit is used for receiving single-phase carrier signals sent by a plurality of first nodes, wherein the single-phase carrier signals comprise any two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal; and the conversion unit is used for converting the single-phase carrier signals to a phase line where the single-phase power line communication module is located.

In a possible implementation manner, the converting unit is specifically configured to convert the plurality of single-phase carrier signals to a phase line on which the single-phase power line communication module is located through a three-phase coupling circuit.

In one possible implementation, the apparatus further includes: a transmitting unit;

the transmitting unit is configured to transmit the carrier signal received by the single-phase power line communication module to a third node, where the carrier signal received by the single-phase power line communication module includes a plurality of single-phase carrier signals, and the third node includes a power line communication module.

In one possible implementation, the apparatus further includes: a determination unit;

the determining unit is configured to determine, for any one of the plurality of single-phase carrier signals, a first strength at which the single-phase power line communication module receives the single-phase carrier signal;

the sending unit is further configured to send the first strength of the single-phase carrier signal to a control device, so that the control device determines a parent node corresponding to a first node that sends the single-phase carrier signal based on the first strength of the single-phase carrier signal sent by the second node and the first strength of the single-phase carrier signal sent by the third node.

In a possible implementation manner, the parent node of the first node is a node corresponding to the maximum first strength.

In one possible implementation, the second node and the third node further comprise an impedance adjustment module,

the determining unit is further configured to determine a second strength of the single-phase carrier signal received by the single-phase power line communication module in response to the impedance adjusting module of the target node being in an operating state;

the sending unit is further configured to send the second strength of the single-phase carrier signal to a control device, where the target node is the second node or the third node.

In one possible implementation, the parent node of the first node is determined by the control device according to a first strength and a second strength of the single-phase carrier signal.

In a fourth aspect of embodiments of the present application, there is provided a communication device, including: a processor and a memory; the memory for storing instructions or computer programs; the processor is configured to execute the instructions or the computer program in the memory, so as to enable the communication device to execute the signal receiving method of the first aspect.

In a fifth aspect of embodiments of the present application, there is provided a signal transmission system, including: the second node is connected with the plurality of first nodes through an L-phase line and an N-phase line, the second node comprises a single-phase power line communication module, and the L-phase line comprises an A-phase line, a B-phase line and a C-phase line;

the first node is used for sending a single-phase carrier signal;

the second node is configured to implement the signal receiving method according to the first aspect.

In one possible implementation, the system further includes: and a third node comprising a power line communication module for communicating with the second node.

According to the technical scheme, for the first node comprising the single-phase power line communication module and the second node comprising the single-phase power line communication module in the network, the second node can be respectively connected with the first nodes through the L-phase line, the L-phase line comprises the A-phase line, the B-phase line and the C-phase line, and the second node can receive single-phase carrier signals respectively sent by the first nodes, so that the single-phase carrier signals are received. Wherein the plurality of single-phase carrier signals include at least two of an a-phase single-phase carrier signal, a B-phase single-phase carrier signal, or a C-phase single-phase carrier signal. Wherein the phases of the single-phase carrier signals transmitted by the first nodes on different phases are different. After the second node receives the single-phase carrier signals through the L-phase line, the single-phase carrier signals are converted to the phase line where the single-phase power line communication module is located, and therefore the single-phase power line communication module of the second node can receive complete carrier signals sent by the first node with different phases.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1a is a schematic diagram of an operation and distribution through network;

FIG. 1b is a diagram of a front switch and a meter;

fig. 2 is a schematic structural diagram of a node according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another node according to an embodiment of the present application;

fig. 4a is a schematic structural diagram of an impedance adjusting module according to an embodiment of the present disclosure;

fig. 4b is a schematic diagram of a node networking according to an embodiment of the present application;

FIG. 4c is an equivalent circuit diagram according to an embodiment of the present application;

fig. 5 is a flowchart of a signal receiving method according to an embodiment of the present disclosure;

fig. 6 is a schematic view of an application topology scene provided in an embodiment of the present application;

fig. 7 is a schematic diagram illustrating attenuation of signals received by various receiving nodes according to an embodiment of the present disclosure;

fig. 8 is a structural diagram of a signal receiving apparatus according to an embodiment of the present application;

fig. 9 is a structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions in the embodiments of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments.

The three-phase balance is required in a meter box in a marketing network, meters in the meter box need to be distributed on A, B and C three phases respectively, but a meter box incoming line node uses single-phase coupling, so that carrier signals sent by the meters in phase coupling with a Power Line Communication (PLC) module in the incoming line node can be received by a PLC module of the incoming line node, and the meters in other two phases are not coupled with the phases of the PLC module of the incoming line node, so that the PLC module of the incoming line node can only receive the carrier signals in the N phase, and cannot acquire complete carrier signals. For example, as shown in fig. 1b, the PLC modules are included in each of the equipment a-C and the meter D-I. One end of a PLC module in a wire inlet node B is connected to a phase C line, one end of the PLC module is connected to a phase N line, one end of a PLC module of a meter D is connected to a phase A line, and the other end of the PLC module of a mark E is connected to a phase B line, and the other end of the PLC module of the mark E is connected to the phase N line. The incoming line node of the meter box 1, i.e., the device B, and the incoming line node of the meter box 2, i.e., the device C, are the second nodes mentioned in this embodiment, and the meter D-meter I is the first node mentioned in this embodiment.

Based on this, the embodiment of the application provides a signal receiving method, for a line inlet node of a meter box, namely a second node, the line inlet node is connected with a plurality of first nodes through an L phase line and an N phase line, the L phase line comprises an A phase line, a B phase line and a C phase line, namely, the second node is connected with different first nodes through the A phase line, the B phase line and the C phase line respectively. When a first node is transmitting a single-phase carrier signal, a second node may receive the single-phase carrier signals transmitted by multiple first nodes. Wherein, the phases of the single-phase carrier signals sent by different first nodes are different. After receiving the single-phase carrier signals with different phases, the second node converts the single-phase carrier signals with different phases to a phase line where a single-phase power line communication module of the second node is located, so that the single-phase power line communication module of the second node can receive the single-phase carrier signals with different phases (including any phase signal of A/B/C and an N-phase line signal) to perform position identification through the complete single-phase carrier signals.

In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, a hardware structure of the second node in the embodiments of the present application will be described first.

Referring to fig. 2, which is a schematic structural diagram of a node provided in an embodiment of the present application, as shown in fig. 2, the node 200 may include a single-phase power line communication module 201 and a three-phase coupling circuit 202.

And a single-phase power line communication module 201 for transmitting data and carrier signals using a power line.

And a three-phase coupling circuit 202 for connecting the plurality of first nodes by L-phase lines, which include a-phase line, B-phase line and C-phase line. The plurality of first nodes are connected with the node through one of the L phase lines respectively. The three-phase coupling circuit 202 may include a coupling transformer and a safety capacitor, among others.

The single-phase power line communication module 201 is further configured to receive, through the three-phase coupling circuit 202, single-phase carrier signals sent by the plurality of first nodes, where the plurality of single-phase carrier signals include at least two of an a-phase single-phase carrier signal, a B-phase single-phase carrier signal, or a C-phase single-phase carrier signal. The phase of the single-phase power line communication module 201 is one of the ABC phases.

In this embodiment, the single-phase power line communication module 201 is located on one of the three phases, and when the second node receives the single-phase carrier signals of different phases through the three-phase coupling circuit, in order to enable the single-phase power line communication module 201 of the node to receive the single-phase carrier signals of different phases, the single-phase carrier signals of different phases are all converted to the phase where the single-phase power line communication module 201 is located through the three-phase coupling circuit.

It should be noted that, in fig. 2, the single-phase communication module 201 is illustrated as an example that the PCL module located on the phase line C, the first node D1 and the first node D2 is connected to the phase line a, the PLC modules located on the first node E1 and the first node E2 are connected to the phase line B, and the PLC modules located on the first node F1 and the first node F2 are connected to the phase line C, which does not limit the implementation of the present application. Each phase line can be connected with a plurality of first nodes in parallel, and the plurality of first nodes connected with the same phase line can transmit carrier signals with the same phase.

The node may further include an impedance adjusting module 203, as shown in fig. 3, where the impedance adjusting module 203 is connected in parallel with the single-phase power line communication module 201 for adjusting the impedance of the node. Specifically, the impedance adjusting module may adjust an output impedance corresponding to the node when sending the signal to the outside, and may also adjust an input impedance for receiving the single-phase carrier signal sent by the first node. The impedance adjusting module 203 includes a capacitor, a resistor, and a switch.

To facilitate understanding of the operation of the impedance adjusting module, the following description will be made with reference to the accompanying drawings.

As shown in fig. 4a, the impedance adjusting module and the PLC module are connected in parallel at both ends of the power line. The capacitor C can select a safety capacitor or a chip capacitor of 10nf, the resistor R can select a resistor of 10 ohms, and the switch K can select an electromagnetic relay or a solid-state relay. When the switch is turned on, the impedance adjusting module has no function, and the impedance of the node is the input impedance of the PLC module and other peripheral circuits. When the switch is closed, the impedance adjusting module acts, and the impedance of the node is the impedance of the impedance adjusting module and the impedance of the PLC module and other peripheral circuit input impedance after being connected in parallel. Because the impedance adjusting module has smaller equivalent impedance, the equivalent impedance of the node is about the impedance of the impedance adjusting module, and the impedance of the node is greatly reduced, so that the impedance adjustment is realized. Wherein, a node refers to each power device in the power distribution network, such as a switch or an electric meter.

It should be noted that, when the impedance adjusting module includes a capacitor, a resistor, and a switch, the adjusting effect achieved by the impedance adjusting module is binary adjustment, and in practical applications, the impedance adjusting module may include an impedance adjuster to achieve continuous adjustment or gradual adjustment.

In order to facilitate understanding of the basic idea of identifying the network topology in the embodiments of the present application, the impedance adjusting module including a capacitor, a resistor, and a switch is described as an example. Referring to fig. 4B, taking 3 nodes connected to the power line as an example, node a, node B and node C are included. Each node is provided with a PLC module and an impedance adjusting module, and the PLC module and the impedance adjusting module are connected to two ends of a line in parallel. When node a transmits a signal, both node B and node C may receive the signal. Since the PLC signal is a high frequency modulated signal, the received signal strength of C will change when the impedance of B is adjusted. That is, when the impedance of the node B changes, the signal attenuation amount of the signal during transmission changes, and the strength of the signal received by the node C changes accordingly. Similarly, when the impedance of node C is adjusted, the signal strength received by node B will change. According to the received signal strength change rule of the node B and the node C, the relative positions of A, B and C can be judged.

Specifically, the equivalent circuit diagram corresponding to fig. 4B is shown in fig. 4C, where Zx and Zy represent power line impedances, and Z2 and Z3 represent equivalent impedances of node B and node C. When the Z2 impedance becomes small (the switch of the impedance adjusting module in node B is closed), the divided voltage of node C decreases, the received signal strength becomes small, and the signal attenuation increases. When the impedance of Z3 becomes small (the switch of the impedance adjusting module of the node C is closed), the divided voltage of the node B needs to be analyzed according to the situation, for example, the line Y is short, zy is small, the divided voltage of the node B is obviously reduced, the received signal strength is reduced, and the signal attenuation is increased. For another example, if line Y is longer and Zy is larger, the voltage division of node B is not reduced significantly, and may even be increased, and the signal attenuation is reduced. That is, when the impedance of Z3 changes, the signal strength received by node B decreases slightly, increases slightly, or does not change.

Through the analysis, it can be known that when the physical position of the impedance adjusting node is located on the line between the transmitting node and the receiving node, the strength of the signal received by the receiving node changes greatly, that is, the attenuation of the signal changes greatly. For example, the impedance adjusting node is node B, the transmission node is node a, and the reception node is node C. When the physical position of the impedance adjusting node is not located on the line between the transmitting node and the receiving node, the strength of the signal received by the receiving node has little or no change, i.e., the attenuation of the signal has little or no change. For example, the impedance adjustment node is node C, the transmission node is node a, and the reception node is node B.

It should be noted that the impedance adjusting module and the PLC module in the node are both coupled to only one phase, as shown in fig. 3, and the impedance adjusting module is coupled to the C phase.

The single-phase power line communication module 201 is further configured to receive an adjustment instruction sent by the control device, and adjust the impedance of the impedance adjusting module according to the adjustment instruction. The adjustment instruction is used to enable the impedance adjusting module to control the switch in the impedance adjusting module to be turned on or off, thereby affecting the equivalent impedance of the node 200.

When the single-phase power line communication module 201 receives a plurality of single-phase carrier signals with different phases through the three-phase coupling circuit 202, it may send the received single-phase carrier signals with different phases to the third node. For example, in fig. 1a, the third nodes are device 1, device 21, device 22, device 23, device 31, device 32, and device 33. As another example, in FIG. 1b, the third nodes are device A and the CCO. The third node comprises a power line communication module and an impedance adjusting module.

Based on the above nodes, embodiments of the present application provide a signal receiving method, which will be described below with reference to the accompanying drawings.

Referring to fig. 5, which is a flowchart of a signal receiving method provided in an embodiment of the present application, as shown in fig. 5, the method is applied to a second node, and a hardware structure of the second node may be as shown in fig. 2 to 3, where the method may include:

s501: the method includes receiving single-phase carrier signals transmitted by a plurality of first nodes, wherein the plurality of single-phase carrier signals include at least two of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal.

The second node is connected with the plurality of first nodes through the L-phase line and the N-phase line, and the first nodes and the second nodes respectively comprise single-phase PLC modules. The L-phase lines comprise an A-phase line, a B-phase line and a C-phase line, namely the second nodes are respectively connected with different first nodes through the A/B/C-phase lines, and the phases of the single-phase carrier signals sent by the first nodes on different phases are different. The second node can be connected with the plurality of first nodes through a phase line, and the carrier signals sent by the plurality of first nodes on the same phase line have the same phase.

In this embodiment, the second node may receive the single-phase carrier signals with different phases sent by the first node on different phase lines through the phase line a, the phase line B, and the phase line C, respectively, so that the second node may receive the complete carrier signal sent by the first node on each phase line, and no longer only receive part of the carrier signals on the phase line N.

S502: and converting the plurality of single-phase carrier signals to the phase line of the single-phase power line communication module.

In this embodiment, because the single-phase PLC module of the second node is coupled to only one phase of the three phases, in order to enable the single-phase PLC module to receive a plurality of different single-phase carrier signals, the second node converts the single-phase carrier signals of a plurality of different phases to be converted to the phase line where the single-phase PLC module is located. As can be seen from fig. 2 or fig. 3, the second node may include a three-phase coupling circuit, and the second node may convert the plurality of single-phase carrier signals to the phase line on which the single-phase PLC module is located through the three-phase coupling circuit.

The single-phase PLC module of the second node may further forward the received multiple single-phase carrier signals to the outside, so that other devices in the power distribution network may also receive the multiple single-phase carrier signals. Specifically, the second node transmits the received carrier signal to a third node including the PLC module by the single-phase PLC module. And the third node is other nodes except the first node and the second node in the power network.

It can be seen that, for a first node including a single-phase power line communication module and a second node including a single-phase power line communication module in a network, since the second node may be connected to a plurality of first nodes through L-phase lines, respectively, the L-phase lines include a-phase line, a B-phase line, and a C-phase line, and the second node may receive single-phase carrier signals respectively sent by the plurality of first nodes. The phase positions of the single-phase carrier signals sent by the first nodes on different phase lines are different, and after the second node receives a plurality of single-phase carrier signals with different phases through the L-phase line, the single-phase carrier signals with the different phases are converted to the phase line where the single-phase power line communication module is located, so that the single-phase power line communication module of the second node can receive the complete carrier signals sent by each first node.

Since the single-phase PLC module of the second node may receive the single-phase carrier signal transmitted by each first node, the location of each first node may be determined based on the strength of the single-phase carrier signal transmitted by the first node. That is, the parent nodes corresponding to the meters of the three phases in the marketing network are determined. A specific implementation of determining a parent node of a first node provided in the embodiments of the present application will be described below with reference to the accompanying drawings.

For the implementation of determining the parent node of the first node, the present embodiment provides the following two implementations:

one implementation manner is that after receiving the single-phase carrier signal sent by the first node, the second node and the third node may determine the strength (first strength) of the received single-phase carrier signal, and send the first strength of the single-phase carrier signal to the control device; the control device determines a parent node of the first node according to the first strength of the single-phase carrier signal transmitted by the second node and the first strength of the single-phase carrier signal transmitted by the third node. And the father node of the first node is the node corresponding to the maximum first strength.

It can be understood that, in the process of single-phase carrier signal transmission, the longer the branch line is, the greater the attenuation of the single-phase carrier signal is during transmission, and the further the node from the first node (the longer the transmission line is), the smaller the strength of the single-phase carrier signal received by the node. Therefore, after the control device receives the strength of the single-phase carrier signal transmitted by each node in the power distribution network, the node which receives the signal strength of the single-phase carrier signal which is the greatest (the smallest attenuation) can be determined to be closest to the first node, and the node can be determined as a parent node of the first node.

For example, as shown in fig. 6, the control device is a CCO, and the first node is a meter a1, a meter b1, a meter c1, a meter a2, a meter b2, a meter c2, a meter a3, a meter b3, and a meter c3 at the bottommost layer. The second nodes are respectively a node F, a node J and a node K, and the third nodes are respectively a CCO, a node A-a node D, a node E and a node G-a node I. Wherein, 20. Meter a1, meter a2 and meter a3 are coupled at phase a, meter B1, meter B2 and meter B3 are coupled at phase B, and meter C1, meter C2 and meter C3 are coupled at phase C. How the CCO determines the parent node of each meter will be described below in conjunction with fig. 6.

In specific implementation, each meter sends a single-phase carrier signal to an upstream node through a phase line where the meter is located, and after each upstream node receives the single-phase carrier signal sent by each meter, the upstream node can determine the strength of the received single-phase carrier signal and send the strength to the CCO. The CCO may receive the strengths transmitted by each of nodes a-K and determine the parent node for each meter based on the strengths transmitted by each node. Specifically, the CCO, upon receiving the strength of each node's transmission, may form a signal attenuation table to determine the parent node by the signal attenuation. The signal strength and the signal attenuation amount are in negative correlation, and the larger the signal strength is, the smaller the signal attenuation amount is. For example, as shown in fig. 7, the MAC address of each table is set horizontally, the MAC address of each upstream node is set vertically, and the number in the figure is the signal attenuation in dB. As can be seen from fig. 7, for meters c1 to c 20. Similarly, for the meter B3-20. By analogy, the parent nodes of meter a1 and meter b1 can be determined as node F, and the parent nodes of meter a3 and meter c3 can be determined as node K. For meter b2, the parent node can be determined as node J, but for meter a2 and meter c2, the attenuation amounts corresponding to node J and node H are the same, and the corresponding parent node cannot be determined.

Based on this, the parent node to which the table corresponds may be determined in another manner. In this embodiment, each upstream node may include an impedance adjusting module, the equivalent impedance of the node is changed by enabling the impedance adjusting module, the strength of the single-phase carrier signal received by the subsequent node can be changed as long as the single-phase carrier signal passes through the node, and then the parent node of the first node is determined according to the first strength of the single-phase carrier signal when the impedance adjusting module is not operated and the second strength of the single-phase carrier signal when the impedance adjusting module is operated. Specifically, in response to the impedance adjusting module of the target node being in the working state, the second strength of the single-phase carrier signal in the ABC three phases received by the single-phase power line communication module is determined, and the second strength of the single-phase carrier signal is sent to the control device, so that the control device determines the parent node of the first node according to the first strength and the second strength of the single-phase carrier signal. The target node may be the second node or the third node.

Specifically, the control device determines a first set according to a first strength and a second strength sent by each receiving node, where a node in the first set is a node whose received signal strength changes due to the operation of an impedance adjusting module of a target node; and the control equipment determines a father node corresponding to the first node according to the first set corresponding to each target node. The control equipment determines a second set comprising the most nodes according to the number of the nodes included in the first set corresponding to each target node; and the control device determines the target node corresponding to the second set as a parent node corresponding to the first node.

Through the above, it can be understood that when the impedance adjusting module of a certain target node acts, the strength of a large number of single-phase carrier signals received by other receiving nodes changes, which may indicate that the single-phase carrier signals sent by the first node may all be forwarded outwards through the target node, and thus the influence range may be large. Therefore, the probability that the target node is directly connected with the first node is high, and the target node is determined to be a father node of the first node.

For example, in fig. 7, the impedance adjusting module of the node K is in an operating state, the strengths of the single-phase carrier signals respectively sent upstream by the meters a3/b3/c3 are all affected by the impedance adjusting module of the node K. That is, the CCO can determine that the affected node set includes 11 nodes by comparing the first strength and the second strength sent by each receiving node.

If the impedance adjusting module of the control node I is in a working state, except for the node K, the strengths of the single-phase carrier signals respectively sent upstream by the meter a3/b3/c3 are affected. That is, the CCO can determine that the affected node set includes 10 nodes by comparing the first strength and the second strength sent by each receiving node { CCO, a-H, J }.

If the impedance adjusting module of the control node J is in a working state, except the node J, the strengths of the single-phase carrier signals respectively sent upstream by the meter a3/b3/c3 are not influenced. Odd, the CCO may determine that the affected set of nodes includes { J } for 1 node, via the first and second strengths of the transmissions of more than each receiving node.

And sequentially controlling the impedance adjusting modules of different receiving nodes to be in a working state, so that the CCO determines a node set influenced by the current adjusting node, and determines the adjusting node corresponding to the node set comprising the most nodes as a father node of the first node. That is, the K node is determined to be the parent node of table meter a3/b3/c 3.

Based on the foregoing method embodiments, the present application provides a signal receiving apparatus and a communication device, which will be described below with reference to the accompanying drawings.

Referring to fig. 8, which is a structural diagram of a signal receiving apparatus according to an embodiment of the present disclosure, as shown in fig. 8, the apparatus 800 may implement a function of a second node in the foregoing embodiment, where the second node is connected to a plurality of first nodes through L-phase lines and N-phase lines, the second node includes a single-phase power line communication module, and the L-phase lines include a-phase line, a B-phase line, and a C-phase line, and may include: a receiving unit 801 and a converting unit 802.

The receiving unit 801 is configured to receive single-phase carrier signals sent by a plurality of first nodes, where the plurality of single-phase carrier signals include any two of an a-phase single-phase carrier signal, a B-phase single-phase carrier signal, and a C-phase single-phase carrier signal. For specific implementation of the receiving unit 801, reference may be made to the related description of S501 in the above method example.

A converting unit 802, configured to convert the single-phase carrier signals to a phase line where the single-phase power line communication module is located. For a specific implementation of the converting unit 802, reference may be made to the related description of S502 in the above method example.

In a specific implementation manner, the converting unit 802 is specifically configured to convert the plurality of single-phase carrier signals to a phase line on which the single-phase power line communication module is located through a three-phase coupling circuit.

In a specific implementation manner, the apparatus further includes: a transmitting unit;

the transmitting unit is configured to transmit the carrier signal received by the single-phase power line communication module to a third node, where the carrier signal received by the single-phase power line communication module includes a plurality of single-phase carrier signals, and the third node includes a power line communication module.

In a specific implementation manner, the apparatus further includes: a determination unit;

the determining unit is configured to determine, for any one of the plurality of single-phase carrier signals, a first strength at which the single-phase power line communication module receives the single-phase carrier signal;

the sending unit is further configured to send the first strength of the single-phase carrier signal to a control device, so that the control device determines a parent node corresponding to a first node that sends the single-phase carrier signal based on the first strength of the single-phase carrier signal sent by the second node and the first strength of the single-phase carrier signal sent by the third node.

In a specific implementation manner, the parent node of the first node is a node corresponding to the maximum first strength.

In a particular implementation, the second node and the third node further comprise an impedance adjustment module,

the determining unit is further configured to determine a second strength of the single-phase carrier signal received by the single-phase power line communication module in response to the impedance adjusting module of the target node being in an operating state;

the sending unit is further configured to send a second strength of the single-phase carrier signal to a control device, where the target node is the second node or the third node.

In a particular implementation, the parent node of the first node is determined by the control device based on a first strength and a second strength of the single-phase carrier signal.

It should be noted that, for specific implementation of each unit in this embodiment, reference may be made to the related description in the embodiment described in fig. 2 or fig. 5, and details of this embodiment are not described herein again.

It should be noted that the hardware structure of the aforementioned signal receiving apparatus 800 may be as shown in fig. 9, and fig. 9 is a schematic structural diagram of a device according to an embodiment of the present application.

Referring to fig. 9, the apparatus 900 includes: a processor 910, a communication interface 920, and a memory 930. Wherein the number of the processors 910 in the device 900 may be one or more, and one processor is taken as an example in fig. 9. In the embodiment of the present application, the processor 910, the communication interface 920 and the memory 930 may be connected by a bus system or other means, wherein fig. 9 illustrates the connection by the bus system 940 as an example.

The processor 910 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor 910 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory 930 may include a volatile memory (english: volatile memory), such as a random-access memory (RAM); the memory 930 may also include a non-volatile memory (SSD), such as a flash memory (flash memory), a hard disk (HDD) or a solid-state drive (SSD); the memory 930 may also comprise a combination of the above-described kinds of memories.

Optionally, memory 930 stores an operating system and programs, executable modules or data structures, or subsets thereof, or expanded sets thereof, wherein the programs may include various operating instructions for performing various operations. The operating system may include various system programs for implementing various basic services and for handling hardware-based tasks. The processor 910 can read the program in the memory 930 to implement the signal receiving method provided by the embodiment of the present application.

The bus system 940 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus system 940 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

An embodiment of the present application further provides a signal transmission system, which may include: the second node is connected with the first nodes through an L-phase line and an N-phase line, the second node comprises a single-phase power line communication module, and the L-phase line comprises an A-phase line, a B-phase line and a C-phase line.

The first node is used for sending a single-phase carrier signal;

the second node is configured to implement the signal receiving method described in the above embodiment.

Optionally, the system may further include: a third node comprising a power line communication module for communicating with the second node; and the second node is also used for sending the carrier signal received by the single-phase power line communication module to the third node.

Optionally, the system may further include: and the control equipment comprises a power line communication module. And the control equipment receives the carrier signal forwarded by the second node or the third node through the power line communication module.

The embodiments of the present application also provide a computer-readable storage medium, which includes instructions or a computer program, when the computer-readable storage medium runs on a computer, the computer is caused to execute the signal receiving method provided in the above embodiments.

The embodiments of the present application also provide a computer program product containing instructions or a computer program, which when run on a computer, causes the computer to execute the signal receiving method provided in the above embodiments.

The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is only a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each service unit in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a hardware form, and can also be realized in a software service unit form.

The integrated unit, if implemented as a software business unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Those skilled in the art will recognize that, in one or more of the examples described above, the services described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the services may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above embodiments are intended to explain the objects, aspects and advantages of the present invention in further detail, and it should be understood that the above embodiments are merely illustrative of the present invention.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (20)

1. A signal receiving method, wherein the method is applied to a second node, the second node is connected to a plurality of first nodes through an L-phase line and an N-phase line, the second node includes a single-phase power line communication module, the L-phase line includes an a-phase line, a B-phase line and a C-phase line, and the method includes:

receiving single-phase carrier signals sent by a plurality of first nodes, wherein the single-phase carrier signals comprise at least two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal;

and converting the single-phase carrier signals to the phase line where the single-phase power line communication module is located.

2. The method of claim 1, wherein the converting the plurality of single-phase carrier signals to the phase line of the single-phase power line communication module comprises:

and converting the single-phase carrier signals to a phase line where the single-phase power line communication module is located through a three-phase coupling circuit.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and sending the carrier signal received by the single-phase power line communication module to a third node, wherein the carrier signal received by the single-phase power line communication module comprises a plurality of single-phase carrier signals, and the third node comprises a power line communication module.

4. The method of claim 3, further comprising:

for any single-phase carrier signal in the plurality of single-phase carrier signals, determining a first strength at which the single-phase carrier signal is received by the single-phase power line communication module, and sending the first strength of the single-phase carrier signal to a control device, so that the control device determines a parent node corresponding to a first node that sends the single-phase carrier signal based on the first strength of the single-phase carrier signal sent by the second node and the first strength of the single-phase carrier signal sent by the third node.

5. The method of claim 4, wherein the parent node of the first node is the node corresponding to the maximum first strength.

6. The method of claim 4 or 5, wherein the second node and the third node further comprise an impedance adjustment module, the method further comprising:

when the impedance adjusting module of a target node is in a working state, determining a second strength of the single-phase carrier signal received by the single-phase power line communication module, and sending the second strength of the single-phase carrier signal to a control device, wherein the target node is the second node or the third node.

7. The method of claim 6, wherein a parent node of the first node is determined by the control device based on the first and second strengths of the single-phase carrier signal.

8. A node, characterized in that the node comprises: the system comprises a single-phase power line communication module and a three-phase coupling circuit; the three-phase coupling circuit is used for connecting a plurality of first nodes through L-phase lines, the L-phase lines comprise an A-phase line, a B-phase line and a C-phase line, and the plurality of first nodes are respectively connected with the nodes through one of the L-phase lines;

the single-phase power line carrier communication module is used for receiving single-phase carrier line numbers sent by the plurality of first nodes through the three-phase coupling circuit, and the plurality of single-phase carrier signals comprise at least two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal.

9. The node of claim 8, further comprising an impedance adjustment module connected in parallel with the single phase power line communication module, the impedance adjustment module configured to adjust the impedance of the node.

10. The node according to claim 9, wherein the single-phase power line communication module is further configured to receive an adjustment instruction sent by a control device, and adjust the impedance of the impedance adjusting module according to the adjustment instruction, where the adjustment instruction is used to enable the impedance adjusting module.

11. The node of any of claims 8-10, wherein the single-phase power line communication module is further configured to transmit the received plurality of single-phase carrier signals of different phases to a third node, and wherein the third node comprises the power line carrier communication module.

12. A signal receiving device, wherein the device is applied to a second node, the second node is connected with a plurality of first nodes through an L-phase line and an N-phase line, the second node includes a single-phase power line communication module, the L-phase line includes an a-phase line, a B-phase line and a C-phase line, including:

the receiving unit is used for receiving single-phase carrier signals sent by a plurality of first nodes, wherein the single-phase carrier signals comprise any two single-phase carrier signals of an A-phase single-phase carrier signal, a B-phase single-phase carrier signal or a C-phase single-phase carrier signal;

and the conversion unit is used for converting the single-phase carrier signals to a phase line where the single-phase power line communication module is located.

13. The apparatus according to claim 12, wherein the converting unit is configured to convert the plurality of single-phase carrier signals to the phase line of the single-phase power line communication module via a three-phase coupling circuit.

14. The apparatus of claim 12 or 13, further comprising: a transmitting unit;

the transmitting unit is configured to transmit the carrier signal received by the single-phase power line communication module to a third node, where the carrier signal received by the single-phase power line communication module includes a plurality of single-phase carrier signals, and the third node includes a power line communication module.

15. The apparatus of claim 14, further comprising: a determination unit;

the determining unit is configured to determine, for any one of the plurality of single-phase carrier signals, a first strength at which the single-phase power line communication module receives the single-phase carrier signal;

the sending unit is further configured to send the first strength of the single-phase carrier signal to a control device, so that the control device determines a parent node corresponding to a first node that sends the single-phase carrier signal based on the first strength of the single-phase carrier signal sent by the second node and the first strength of the single-phase carrier signal sent by the third node.

16. The apparatus of claim 15, wherein the parent node of the first node is the node corresponding to the greatest first strength.

17. The apparatus of claim 15 or 16, wherein the second node and the third node further comprise an impedance adjustment module,

the determining unit is further configured to determine a second strength of the single-phase carrier signal received by the single-phase power line communication module in response to the impedance adjusting module of the target node being in an operating state;

the sending unit is further configured to send the second strength of the single-phase carrier signal to a control device, where the target node is the second node or the third node.

18. The apparatus of claim 17, wherein a parent node of the first node is determined by the control device based on the first and second strengths of the single-phase carrier signal.

19. A communication device, the device comprising: a processor and a memory;

the memory for storing instructions or computer programs;

the processor is configured to execute the instructions or the computer program in the memory to cause the communication device to execute the signal receiving method according to any one of claims 1 to 7.

20. A signal transmission system, the system comprising: a first node and a second node according to any one of claims 8-11, the second node being connected to a plurality of the first nodes via L-phase lines and N-phase lines, the second node comprising a single-phase power line communication module, the L-phase lines comprising a-phase lines, B-phase lines and C-phase lines;

the first node is used for sending a single-phase carrier signal;

the second node, configured to implement the signal receiving method according to any one of claims 1 to 7.

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