Power line communication system, apparatus and method

Abstract

The present invention provides a power line communication system, apparatus and method. At different time periods, the same power line communication apparatus can receive the reported data of another power line communication apparatus, and the same power line communication apparatus can send the reported data thereof to a main control device; moreover, by means of different power line communication apparatuses, the same power line communication apparatus can respectively receive the reported data and report data at the same time period, so that the problem of signal transmission failure caused by signal interference is avoided.

Description

Power line communication system, device and method

[0001] Related applications

[0002] This invention claims priority from the Chinese invention patent with application number 2024101574488, application date February 4, 2024, and invention name “A power line communication system, device and method”. Technical Field

[0003] The present invention relates to the technical field of power line communication, and in particular to a power line communication system, device and method. Background Art

[0004] In existing power line communication systems, power line communication devices couple transmission signals onto power lines for transmission. If the same power line communication device receives reported data from other power line communication devices while simultaneously sending its own reported data to a master control device, signal interference will occur, resulting in signal transmission failure. Summary of the Invention

[0005] The present invention aims to solve the above problems.

[0006] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0007] In one aspect, the present invention provides a power line communication system, comprising: a master control device, and S power line communication devices connected in series on a power line behind the master control device; the S power line communication devices are numbered 1, 2, ..., S, and the power line communication devices numbered 1, 2, ..., S are arranged from the master control device in a direction away from the master control device, wherein:

[0008] The power line communication device includes: a first interface, a second interface, and a switch; a first end of the first interface is electrically connected to a power line interface close to the main control device, and a second end of the first interface is electrically connected to a first end of the switch; a first end of the second interface is electrically connected to a power line interface far from the main control device, and a second end of the second interface is electrically connected to a second end of the switch; the switch is in a closed state by default;

[0009] The master control device is used to send a control instruction on the power line, wherein the control instruction includes: a first device number N0, a second device number N1 and a synchronization time T0, N0 <N1;

[0010] The power line communication device is configured to receive the control instruction through the first end of the first interface, start timing from a synchronization time T0, and when the current time T satisfies formula 1, control the switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices through the first end of the second interface;

[0011] The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0012] When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0013] The second formula is:

[0014] When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to restore the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0015] Another aspect of the present invention provides a power line communication device, which is applied to the above-mentioned power line communication system, comprising: a first interface, a processor, a second interface and a switch; wherein:

[0016] The first end of the first interface is electrically connected to a power line interface close to the main control device, the second end of the first interface is electrically connected to the first end of the switch, and the third end of the first interface is electrically connected to the first input and output ends of the processor; the first end of the second interface is electrically connected to a power line interface far from the main control device, the second end of the second interface is electrically connected to the second end of the switch, and the third end of the second interface is electrically connected to the second input and output ends of the processor; the switch is in a closed state by default, and the control end of the switch is electrically connected to the control end of the processor;

[0017] The processor is configured to receive a control instruction through the first end of the first interface, the control instruction being sent by the master device on the power line, the control instruction including: a first device number N0, a second device number N1, and a synchronization time T0, N0 <N1;

[0018] The processor is further configured to start timing from a synchronization time T0, and when the current time T satisfies formula 1, control the switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices through the first end of the second interface;

[0019] The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0020] When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0021] The second formula is:

[0022] When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to restore the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0023] Another aspect of the present invention provides a power line communication method, applied to the above system, comprising:

[0024] The power line communication device receives the control instruction through the first end of the first interface;

[0025] The power line communication device starts timing from the synchronization time T0 and performs the following operations:

[0026] When the current time T satisfies formula 1, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and reported data from other power line communication devices is received through the first end of the second interface;

[0027] The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0028] When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0029] The second formula is:

[0030] When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to return to a closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0031] It can be seen from the technical solution provided by the above-mentioned present invention that the present invention provides a power line communication system, device and method. The same power line communication device can receive reported data from other power line communication devices and send its own reported data to the main control device at different times, and can also receive reported data and report data separately through different power line communication devices at the same time, avoiding the problem of signal transmission failure caused by signal interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] FIG1 is a schematic structural diagram of a power line communication system provided by an embodiment of the present invention;

[0034] FIG2 is a schematic structural diagram of a power line communication device provided by an embodiment of the present invention;

[0035] FIG3 is a flow chart of a power line communication method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] FIG1 shows a schematic structural diagram of a power line communication system provided by an embodiment of the present invention. Referring to FIG1 , the power line communication system provided by an embodiment of the present invention includes: a master control device, and S power line communication devices connected in series on a power line behind the master control device; the S power line communication devices are numbered 1, 2, ..., S, and the power line communication devices numbered 1, 2, ..., S are arranged from the master control device in a direction away from the master control device, wherein:

[0038] The power line communication device includes: a first interface, a second interface, and a switch; a first end of the first interface is electrically connected to a power line interface close to a main control device, and a second end of the first interface is electrically connected to a first end of the switch; a first end of the second interface is electrically connected to a power line interface far from the main control device, and a second end of the second interface is electrically connected to a second end of the switch; the switch is in a closed state by default;

[0039] The master device is used to send a control instruction on the power line. The control instruction includes: the first device number N0, the second device number N1 and the synchronization time T0, N0 <N1;

[0040] A power line communication device, configured to receive a control instruction via a first end of a first interface, start timing from a synchronization time T0, and when a current time T satisfies formula 1, control a switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices via the first end of the second interface;

[0041] Formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0042] When the current time T satisfies Formula 2, the control switch is in the off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0043] Formula 2 is:

[0044] When the current time T does not satisfy Formula 1 and Formula 2, the control switch is restored to the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0045] Specifically, the power line communication system provided by an embodiment of the present invention includes: a main control device, and S power line communication devices connected in series on the power line behind the main control device; the first power line communication device connected after the main control device among the S power line communication devices is numbered 1, the second power line communication device is numbered 2... and the Sth power line communication device is numbered S.

[0046] The power line communication device can be a smoke alarm, camera, smart light and other equipment. It can communicate with the main control device via the power line, or it can be used as an external device to connect to existing smoke alarms, cameras, smart lights and other equipment to control the existing equipment.

[0047] In the power line communication system of the present invention, the master control device can broadcast and send control instructions to uniformly control all power line communication devices in the power line communication system, or it can send control instructions to a power line communication device with a specific number to control the power line communication device with a specific number in the power line communication system.

[0048] The default state of the switch in the power line communication device of the present invention is a closed state. When the switch is closed, the equivalent communication path of the power line between the first end of the first interface and the first end of the second interface in the power line communication device is connected, and the power line equivalent power supply path between the first end of the first interface and the first end of the second interface is connected. When the switch is disconnected, the power line equivalent power supply path between the first end of the first interface and the first end of the second interface is still connected to supply power to the power line communication device, but the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected. Other power line communication devices in the power line communication system cannot communicate through the power line equivalent communication path of the power line communication device, and can only be sent or directly forwarded after processing by the power line communication device.

[0049] In the present invention, the main control device sends a control instruction on the power line, which can instruct the power line communication device to report data according to preset rules. When the data is reported, it can avoid the same power line communication device receiving the reported data of other power line communication devices and sending its own reported data to the main control device at the same time, thereby avoiding signal interference and causing signal transmission failure.

[0050] The control instructions sent by the master device may include a set of numbers, for example, including: the first device number N0, the second device number N1, and the synchronization time T0, where N0 < N1; thus, the reporting method of the power line communication devices with device numbers from N0 to N1 can be controlled. Of course, the control instructions sent by the master device may also include multiple sets of numbers, for example, including: the first device number N0, the second device number N1, and the synchronization time T0, where N0 < N1; the third device number N2, the fourth device number N3, and the synchronization time T0, where N0 < N1 < N2 < N3; thus, the reporting method of the power line communication devices with device numbers from N0 to N1 and the reporting method of the power line communication devices with device numbers from N2 to N3 can be controlled. If T0 is the same in multiple sets of numbers, the power line communication devices with device numbers from N0 to N1 and the power line communication devices with device numbers from N2 to N3 can report data at the same time without interfering with each other, thereby improving the efficiency of data reporting.

[0051] After each power line communication device receives the control instructions sent by the master device, it obtains the current time T, and then determines that when the current time T meets the preset formula, it controls the switch to be in the off state, so that the equivalent communication path of the power line between the first end of the first interface and the first end of the second interface is disconnected.

[0052] Among them, when meeting Formula 1, the power line communication device can receive the reported data of other power line communication devices through the first end of the second interface; that is, the power line communication device can receive the reported data.

[0053] When meeting Formula 2, the power line communication device can send the reported data on the power line through the first end of the first interface; that is, the power line communication device can report data.

[0054] When neither meeting Formula 1 nor meeting Formula 2, the control switch resumes the closed state, and power line communication is carried out through the equivalent communication path of the power line between the first end of the first interface and the first end of the second interface. The power line communication device can resume the normal path so that other power line communication devices can transmit data through the power line.

[0055] Thus, the same power line communication device can receive the reported data of other power line communication devices and send its own reported data to the master device at different times, thereby avoiding the problem of signal interference and signal transmission failure.

[0056] In specific implementation, if the control instruction sent by the main control device includes: the first device number 5, the second device number 10 and the synchronization time T0; at the same current time, if the power line communication device with the device number 6 determines that the current time conforms to the first formula, then it is determined that the power line communication device with the device number 6 receives the reported data through the first end of the second interface on the power line; at the same time, the power line communication device with the device number 5 can determine that its own current time conforms to the second formula, then it is determined that the power line communication device with the device number 5 reports data through the first end of the first interface on the power line; thus, the present invention can receive the reported data through the power line communication device with the device number 6 and send the reported data through the power line communication device with the device number 5; thereby, it can avoid the signal interference caused by the same power line communication device receiving the reported data of other power line communication devices and sending its own reported data to the main control device at the same time, resulting in the problem of signal transmission failure.

[0057] It can be seen that through the power line communication system provided by the embodiment of the present invention, the same power line communication device can not only receive reported data from other power line communication devices and send its own reported data to the main control device at different times, but can also receive reported data and report data through different power line communication devices at the same time, thereby avoiding the problem of signal transmission failure caused by signal interference.

[0058] FIG2 shows a schematic diagram of the structure of a power line communication device provided by an embodiment of the present invention. The power line communication device is applied to the power line communication system as shown in FIG1 . The following is only a brief description of the structure and function of the power line communication device. For other matters not covered, please refer to the relevant description of the power line communication system mentioned above, which will not be described in detail here. Referring to FIG2 , the power line communication device provided by an embodiment of the present invention includes: a first interface, a processor, a second interface, and a switch; wherein:

[0059] A first end of the first interface is electrically connected to a power line interface close to the main control device, a second end of the first interface is electrically connected to a first end of the switch, and a third end of the first interface is electrically connected to a first input / output terminal of the processor; a first end of the second interface is electrically connected to a power line interface far from the main control device, a second end of the second interface is electrically connected to a second end of the switch, and a third end of the second interface is electrically connected to a second input / output terminal of the processor; the switch is in a closed state by default, and a control end of the switch is electrically connected to a control end of the processor;

[0060] The processor is configured to receive a control instruction through the first end of the first interface, the control instruction being sent by the master device on the power line, and the control instruction including: the first device number N0, the second device number N1 and the synchronization time T0, N0 <N1;

[0061] The processor is further configured to start timing from a synchronization time T0, and when the current time T satisfies formula 1, control the switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices through the first end of the second interface;

[0062] Formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0063] When the current time T satisfies Formula 2, the control switch is in the off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0064] Formula 2 is:

[0065] When the current time T does not satisfy Formula 1 and Formula 2, the control switch is restored to the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0066] It can be seen that through the power line communication device provided by the embodiment of the present invention, the same power line communication device can not only receive reported data from other power line communication devices and send its own reported data to the main control device at different times, but can also receive reported data and report data through different power line communication devices at the same time, thereby avoiding the problem of signal transmission failure caused by signal interference.

[0067] FIG3 shows a flow chart of a power line communication method according to an embodiment of the present invention. The power line communication method is applied to the power line communication system as shown in FIG1 . The following is a brief description of the process of the power line communication method. For other matters not covered, please refer to the relevant description of the power line communication system described above, which will not be described in detail here. Referring to FIG3 , the power line communication method according to an embodiment of the present invention includes:

[0068] S1, the power line communication device receives a control instruction through the first end of the first interface;

[0069] S2: The power line communication device starts timing from the synchronization time T0 and performs the following operations:

[0070] When the current time T satisfies formula 1, the control switch is in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reported data of other power line communication devices is received through the first end of the second interface;

[0071] Formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1;

[0072] When the current time T satisfies Formula 2, the control switch is in the off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface;

[0073] Formula 2 is:

[0074] When the current time T does not satisfy Formula 1 and Formula 2, the control switch is restored to the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

[0075] It can be seen that through the power line communication method provided by the embodiment of the present invention, the same power line communication device can not only receive reported data from other power line communication devices and send its own reported data to the main control device at different times, but can also receive reported data and report data separately through different power line communication devices at the same time, thereby avoiding the problem of signal transmission failure caused by signal interference.

[0076] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments without departing from the principles and intent of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power line communication system, characterized in that: include: A master control device, and S power line communication devices connected in series on the power line behind the master control device; the S power line communication devices are numbered 1, 2, ..., S, and the power line communication devices numbered 1, 2, ..., S are arranged from the master control device in a direction away from the master control device, wherein: The power line communication device includes: a first interface, a second interface, and a switch; a first end of the first interface is electrically connected to a power line interface close to the main control device, and a second end of the first interface is electrically connected to a first end of the switch; a first end of the second interface is electrically connected to a power line interface far from the main control device, and a second end of the second interface is electrically connected to a second end of the switch; the switch is in a closed state by default; The master control device is used to send a control instruction on the power line, wherein the control instruction includes: a first device number N0, a second device number N1 and a synchronization time T0, N0 <N1; The power line communication device is configured to receive the control instruction through the first end of the first interface, start timing from a synchronization time T0, and when the current time T satisfies formula 1, control the switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices through the first end of the second interface; The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1; When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface; The second formula is: When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to restore the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

2. A power line communication device, applied to the power line communication system according to claim 1, characterized in that: include: A first interface, a processor, a second interface, and a switch; wherein: The first end of the first interface is electrically connected to a power line interface close to the main control device, the second end of the first interface is electrically connected to the first end of the switch, and the third end of the first interface is electrically connected to the first input and output ends of the processor; the first end of the second interface is electrically connected to a power line interface far from the main control device, the second end of the second interface is electrically connected to the second end of the switch, and the third end of the second interface is electrically connected to the second input and output ends of the processor; the switch is in a closed state by default, and the control end of the switch is electrically connected to the control end of the processor; The processor is configured to receive a control instruction through the first end of the first interface, the control instruction being sent by the master device on the power line, the control instruction including: a first device number N0, a second device number N1, and a synchronization time T0, N0 <N1; The processor is further configured to start timing from a synchronization time T0, and when the current time T satisfies formula 1, control the switch to be in an off state, disconnect the power line equivalent communication path between the first end of the first interface and the first end of the second interface, and receive reported data from other power line communication devices through the first end of the second interface; The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1; When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface; The second formula is: When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to restore the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

3. A power line communication method, applied to the system according to claim 1, characterized in that: include: The power line communication device receives the control instruction through the first end of the first interface; The power line communication device starts timing from the synchronization time T0 and performs the following operations: When the current time T satisfies formula 1, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and reported data from other power line communication devices is received through the first end of the second interface; The formula 1 is: Among them, % is the remainder operation, T s is the default value, N w is the device number of the power line communication device, N0≤N w ≤N1; When the current time T satisfies formula 2, the switch is controlled to be in an off state, the power line equivalent communication path between the first end of the first interface and the first end of the second interface is disconnected, and the reporting data is sent on the power line through the first end of the first interface; The second formula is: When the current time T does not satisfy Formula 1 and Formula 2, the switch is controlled to restore the closed state, and power line communication is performed through the power line equivalent communication path between the first end of the first interface and the first end of the second interface.

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