Node communication device and node communication system

Abstract

The utility model provides a node communication device and a communication system, and the node communication device comprises a master control end and at least one controlled end. Wherein the main control end comprises a first zero point detection circuit, a first controller and a waveform control circuit, and the first zero point detection circuit, the first controller and the waveform control circuit are connected in sequence; each controlled end comprises a second zero point detection circuit and a second controller, and the second zero point detection circuit is connected with the second controller; and the waveform control circuit is connected with the second zero point detection circuit of each controlled end through a power line. According to the scheme, the use cost of the communication equipment can be reduced, and the communication reliability of the equipment is improved.

Description

[0001] This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office on January 31, 2024, with application number 2024202486634 and application name “A node communication device and node communication system”, all contents of which are incorporated by reference in this application. Technical Field

[0002] The utility model and the field of communication technology specifically relate to a node communication device and a node communication system. Background Art

[0003] With the development of Internet of Things technology, PLC (Power Line Communication) technology is becoming more and more widely used in smart home applications. In the existing solutions, in the existing control system, it is generally divided into wired and wireless systems. Among them, the wireless system is easily subject to interference from the space environment and usually cannot achieve long-distance, multi-node reliable communication; and the wired system includes weak current communication and strong current communication. Among them, the disadvantage of weak current communication is that the construction is difficult and the cost is high. Strong current communication is generally a communication method based on power lines using high-frequency modulation and demodulation technology. There are many electrical equipment in general buildings, among which the number of lighting lamps is the largest. If each PLC electrical equipment is required to be controlled individually, it will face the problem of high equipment cost. For example, if each downlight is required to be controlled to switch or dim individually, then the driver of each downlight needs to have a power line communication dedicated chip and circuit, and occupy a unique device number. There are dozens or hundreds of nodes in an office or home. If communication equipment is deployed in this way, the cost is high.

[0004] That is, the existing solutions have the problems of low communication reliability and high cost. Utility Model Content

[0005] A technical problem to be solved by the present invention is to provide a node communication device and a node communication system, which can reduce the use cost of communication equipment and improve communication reliability.

[0006] According to a first aspect of the utility model, there is provided a node communication device, comprising: a master control terminal and at least one controlled terminal;

[0007] Wherein, the main control end includes a first zero point detection circuit, a first controller, and a waveform control circuit, and the first zero point detection circuit, the first controller, and the waveform control circuit are connected in sequence;

[0008] Each controlled end includes a second zero point detection circuit and a second controller respectively, and the second zero point detection circuit is connected to the second controller; the waveform control circuit is connected to the second zero point detection circuit of each controlled end through a power line.

[0009] Based on the above scheme, the main control end detects the zero point position of the input signal through the first zero point detection circuit, and the first controller controls the waveform control circuit to convert the message to be communicated into a predetermined waveform signal and sends it to the controlled end based on the zero point position of the input signal and the predetermined waveform generation rule (the waveform output time of the signal is controlled according to the corresponding relationship between the agreed logical number and the zero-crossing signal pulse width), and sends it to the controlled end; the second zero point detection circuit of the controlled end obtains the zero-crossing signal pulse width of the predetermined waveform signal, and the second controller identifies the message to be communicated based on the signal recognition rule and the zero-crossing signal pulse width of the predetermined waveform signal; using this scheme, there is no need to configure the dedicated chip and circuit described in the background technology at each controlled end, which can reduce the use cost of communication equipment (such as PLC equipment) and improve the communication reliability of the communication equipment.

[0010] According to one implementation of the first aspect of the utility model, the waveform control circuit includes a first optocoupler, a bidirectional thyristor, a bidirectional TVS tube, a first resistor, and a second resistor;

[0011] The anode input end of the first optocoupler is connected to the first controller; one output end of the bidirectional thyristor is connected to the collector of the first optocoupler through the first resistor, and the other output end of the bidirectional thyristor is connected to the emitter of the first optocoupler through the second resistor; the control end of the bidirectional thyristor is connected to the emitter of the first optocoupler; and the two ends of the bidirectional TVS tube are respectively connected to the two output ends of the bidirectional thyristor;

[0012] The output end of the bidirectional thyristor is connected to the input end of the second zero point detection circuit through a power line.

[0013] According to an implementation of the first aspect of the present invention, a third resistor is provided between the first controller and the input end of the first optical coupler, and current is limited by the third resistor to protect the first optical coupler.

[0014] According to one embodiment of the first aspect of the utility model, the first zero point detection circuit includes a second optocoupler, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; wherein the live wire is connected to one input end of the second optocoupler through the fifth resistor, the neutral wire is connected to the other input end of the second optocoupler through the seventh resistor, the circuit supply voltage is connected to the collector of the second optocoupler through the fourth resistor, and the collector of the second optocoupler outputs a zero point detection signal through the sixth resistor; the emitter of the second optocoupler is grounded.

[0015] According to an embodiment of the first aspect of the present invention, the first zero point detection circuit further includes a capacitor, wherein one end of the capacitor is connected between the sixth resistor and the zero point signal output end, and the other end of the capacitor is grounded. The capacitor is used to remove clutter signals in the zero point signal.

[0016] According to one embodiment of the first aspect of the utility model, the second zero point detection circuit includes a second optocoupler, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; wherein the live wire is connected to one input end of the second optocoupler through the fifth resistor, the neutral wire is connected to the other input end of the second optocoupler through the seventh resistor, the circuit supply voltage is connected to the collector of the second optocoupler through the fourth resistor, and the collector of the second optocoupler outputs a zero point detection signal through the sixth resistor; the emitter of the second optocoupler is grounded.

[0017] According to an implementation of the first aspect of the utility model, the second zero point detection circuit further includes a capacitor, wherein one end of the capacitor is connected between the sixth resistor and the zero point signal output end, and the other end of the capacitor is grounded.

[0018] According to an implementation of the first aspect of the utility model, the controlled end further includes: a temperature detector and a voltage detector; wherein the temperature detector and the voltage detector are respectively connected to the second controller.

[0019] According to a second aspect of the present utility model, a node communication system is also proposed, comprising: the above-mentioned node communication device and a gateway.

[0020] According to one embodiment of the second aspect of the utility model, a node communication system also includes a cloud server and a mobile A, i.e. a client; wherein the mobile A, i.e. a client, is connected to a gateway via a cloud server, and the gateway is connected to a master control end of the node communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, a brief introduction is given below to the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic block diagram of the node communication device proposed by the utility model.

[0023] Figure 2 It is another schematic block diagram of the node communication device proposed by the utility model.

[0024] Figure 3 It is a schematic diagram of the zero point detection circuit proposed by the utility model.

[0025] Figure 4 It is another schematic block diagram of the node communication device proposed by the utility model.

[0026] Figure 5 It is a schematic block diagram of the node communication system proposed by the utility model. DETAILED DESCRIPTION

[0027] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations on the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one or more (including two). The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0028] References to "one embodiment" or "some embodiments" etc. described in this specification mean that the specific features, structures or characteristics described in conjunction with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. The term "connected" includes direct and indirect connections, unless otherwise specified.

[0029] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0030] A node communication device and a node communication system of the present invention are described in detail below with reference to the accompanying drawings.

[0031] First, refer to Figure 1 , shows a node communication device, including: a master control end, at least one controlled end (controlled end 1, controlled end 2...controlled end N); wherein the master control end includes a first zero point detection circuit, a first controller, and a waveform control circuit, and the first zero point detection circuit, the first controller, and the waveform control circuit are connected in sequence;

[0032] Each controlled end includes a second zero point detection circuit and a second controller respectively, and the second zero point detection circuit is connected to the second controller; the waveform control circuit is connected to the second zero point detection circuit of each controlled end through a power line.

[0033] Among them, the main control end detects the zero point position of the input signal through the first zero point detection circuit; the first controller outputs the waveform after the predetermined time from the zero point position of the signal is closed according to the zero point position of the input signal, and converts the message to be communicated into a predetermined waveform signal; wherein the predetermined time is determined according to the pre-agreed zero-crossing signal pulse width; the pre-agreed zero-crossing signal pulse width corresponds to the logic number 1. The predetermined waveform signal is sent to the controlled end; the second zero point detection circuit of the controlled end obtains the zero-crossing signal pulse width of the predetermined waveform signal, and the second controller identifies the message to be communicated according to the zero-crossing signal pulse width corresponding to the logic number 0 and the zero-crossing signal pulse width corresponding to the logic number 1, and the zero-crossing signal pulse width of the predetermined waveform signal; wherein the zero-crossing signal pulse width corresponding to the logic number 0 and the zero-crossing signal pulse width corresponding to the logic number 1 are based on the pre-agreed zero-crossing signal pulse width, and are determined according to the pre-agreed zero-crossing signal pulse width.

[0034] Based on the above solution, there is no need to configure the dedicated chip and circuit described in the background technology at each controlled end, which can reduce the use cost of communication equipment (such as PLC equipment) and improve the communication reliability of the communication equipment.

[0035] In one embodiment, reference Figure 2 As shown, the waveform control circuit includes a first optocoupler U1, a bidirectional thyristor Q1, a bidirectional TVS tube D1, a first resistor R1, and a second resistor R2;

[0036] The anode input terminal of the first optical coupler U1 is connected to the first controller; one output terminal of the bidirectional thyristor Q1 is connected to the collector of the first optical coupler U1 through the first resistor R1, and the other output terminal of the bidirectional thyristor Q1 is connected to the emitter of the first optical coupler U1 through the second resistor R2; the control terminal of the bidirectional thyristor Q1 is connected to the emitter of the first optical coupler U1; Figure 2 In the embodiment, the control end of the bidirectional thyristor Q1 is connected between the other output end of the first optical coupler U1 and the second resistor R3.

[0037] Two ends of the bidirectional TVS tube D1 are respectively connected to two output ends of the bidirectional thyristor Q1; the two output ends of the bidirectional thyristor Q1 are connected to the input end of the second zero point detection circuit through the power line.

[0038] In one embodiment, a third resistor R2 is provided between the first controller and the input end of the first optical coupler U1 , and current is limited by the third resistor to protect the first optical coupler.

[0039] In one embodiment, reference Figure 3 The first zero point detection circuit includes a second optocoupler U2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; wherein, the live wire is connected to an input end (pin 1) of the second optocoupler U2 through the fifth resistor R5, the neutral wire is connected to the other input end (pin 2) of the second optocoupler through the seventh resistor R7, the circuit power supply voltage (VCC) is connected to the collector (pin 4) of the second optocoupler through the fourth resistor R4, and the collector of the second optocoupler U2 outputs a zero point detection signal (ZERO) through the sixth resistor R6; the emitter (pin 3) of the second optocoupler U2 is grounded.

[0040] In one embodiment, the first zero point detection circuit further includes a capacitor C1, wherein one end of the capacitor is connected between the sixth resistor R6 and the zero point signal output end, and the other end of the capacitor C1 is grounded. The capacitor is used to remove clutter signals in the zero point signal.

[0041] In one embodiment, reference Figure 3 The second zero point detection circuit has a similar structure to the first zero point detection circuit and will not be described in detail here.

[0042] In one embodiment, reference Figure 4 As shown, the controlled end also includes: a temperature detector and a voltage detector; wherein the temperature detector and the voltage detector are respectively connected to the second controller. The temperature detector is used to detect the temperature of the controlled end; the voltage detector is used to detect the voltage of the received signal of the controlled end (the voltage of the predetermined waveform signal or the voltage of the non-predetermined waveform signal); the second controller is used to obtain the zero-crossing signal pulse width corresponding to the logic number 0 and the zero-crossing signal pulse width corresponding to the logic number 1 in real time according to the temperature of the controlled end and the voltage of the received signal from the pre-calibrated corresponding relationship between the temperature of the controlled end, the voltage of the received signal and the logic numbers 0 and 1; and identify the message to be communicated according to the zero-crossing signal pulse width corresponding to the logic number 0, the zero-crossing signal pulse width corresponding to the logic number 1 and the zero-crossing signal pulse width of the predetermined waveform signal.

[0043] The utility model also provides a node communication system, comprising: the above-mentioned node communication device and a gateway.

[0044] refer to Figure 5 The utility model proposes a node communication system which also includes a cloud server and a mobile APP client; wherein the mobile APP client is connected to the gateway through the cloud server, and the gateway is connected to the main control end of the node communication device.

[0045] Combination Figures 1 to 4 In the scheme, the working principle of the master end converting the communication message into a predetermined waveform signal is as follows:

[0046] 1. The first zero point detection circuit detects the zero point in real time and records it. R5 and R7 are current limiting resistors, R4 is a pull-up resistor for level pull-up; R6 is a current limiting resistor for current limiting, and C1 is a coupling capacitor for removing coupled noise signals. When it is not zero point, the voltage difference between LIN (live wire) and NIN (neutral wire) is non-zero, and the current flows through R5 and R7. Pins 3 and 4 on the right end of the optocoupler U2 are connected, and the pull-up of R4 fails. After passing through the current limiting resistor R6 and the coupling capacitor C1, the signal pin ZERO level is 0; when it is zero point, the voltage difference between LIN and NIN is zero, and the current flowing through R5 and R7 is 0. Pins 3 and 4 on the right end of the optocoupler U2 are not connected, and the pull-up of R4 takes effect. After passing through the current limiting resistor R6 and the coupling capacitor C1, the signal pin ZERO level is 1. Based on this principle, the reading of the zero point waveform is realized. The signal pin ZERO is connected Figure 2 A first controller is shown.

[0047] The first controller inputs the message to be transmitted into the signal pin DIM1 through the control instruction.

[0048] 2. The first controller controls the waveform output of the thyristor according to the zero point detection result of the waveform sent by the signal pin ZERO, the characteristics of the thyristor, and the waveform generation rules of the thyristor, and outputs a predetermined waveform signal of a certain characteristic (the predetermined waveform signal includes but is not limited to a sine wave, a triangle wave, a square wave, a sawtooth wave, etc.);

[0049] In the waveform control circuit, R1, R2, and R3 are current limiting resistors, U1 is an optocoupler, Q1 is a bidirectional thyristor, and D1 is a TVS tube (its function is to quickly respond to and suppress transient voltages in the circuit to prevent voltage from damaging electronic equipment). When the signal pin DIM1 outputs a high level, the optocoupler U1 is turned on, causing its 6th and 4th pins to be short-circuited, and the current is limited by R1 and R3, and Q1 is turned on; when the signal passes through the zero point, the thyristor Q1 is automatically disconnected, thereby achieving output waveform control.

[0050] The working principle of the controlled end identifying the message to be communicated based on the predetermined waveform signal received from the power line is as follows:

[0051] 1. The controlled end receives the processed predetermined waveform signal output by the master end;

[0052] 2. The controlled end detects the zero-crossing signal pulse width of the predetermined waveform signal through the second zero point detection circuit;

[0053] 3. The controlled end obtains the first controlled end temperature and the first receiving signal voltage;

[0054] 4. Obtaining the zero-crossing signal pulse width corresponding to the logic numbers 0 and 1 according to the temperature of the first controlled terminal and the voltage of the first received signal;

[0055] 5. Identify the message to be communicated according to the zero-crossing signal pulse width corresponding to the logic numbers 0 and 1, and the zero-crossing signal pulse width corresponding to the predetermined waveform signal.

[0056] The utility model also provides a node communication system, comprising: the above-mentioned node communication device.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A node communication device, characterized in that: include: A master terminal and at least one controlled terminal; Wherein, the main control end includes a first zero point detection circuit, a first controller, and a waveform control circuit, and the first zero point detection circuit, the first controller, and the waveform control circuit are connected in sequence; Each controlled end includes a second zero point detection circuit and a second controller respectively, and the second zero point detection circuit is connected to the second controller; the waveform control circuit is connected to the second zero point detection circuit of each controlled end through a power line.

2. The node communication device according to claim 1, characterized in that: The waveform control circuit includes a first optical coupler, a bidirectional thyristor, a bidirectional TVS tube, a first resistor, and a second resistor; The anode input end of the first optocoupler is connected to the first controller; one output end of the bidirectional thyristor is connected to the collector of the first optocoupler through the first resistor, and the other output end of the bidirectional thyristor is connected to the emitter of the first optocoupler through the second resistor; the control end of the bidirectional thyristor is connected to the emitter of the first optocoupler; and the two ends of the bidirectional TVS tube are respectively connected to the two output ends of the bidirectional thyristor; The output end of the bidirectional thyristor is connected to the input end of the second zero point detection circuit through a power line.

3. The node communication device according to claim 1, characterized in that: A third resistor is arranged between the first controller and the input end of the first optical coupler.

4. The node communication device according to claim 1, characterized in that: The first zero point detection circuit includes a second optocoupler, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; wherein the live wire is connected to one input end of the second optocoupler through the fifth resistor, the neutral wire is connected to the other input end of the second optocoupler through the seventh resistor, the circuit power supply voltage is connected to the collector of the second optocoupler through the fourth resistor, and the collector of the second optocoupler outputs a zero point detection signal through the sixth resistor; the emitter of the second optocoupler is grounded.

5. The node communication device according to claim 4, characterized in that: The first zero point detection circuit also includes a capacitor, wherein one end of the capacitor is connected between the sixth resistor and the zero point signal output end, and the other end of the capacitor is grounded.

6. The node communication device according to claim 1, characterized in that: The second zero point detection circuit includes a second optocoupler, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; wherein the live wire is connected to one input end of the second optocoupler through the fifth resistor, the neutral wire is connected to the other input end of the second optocoupler through the seventh resistor, the circuit power supply voltage is connected to the collector of the second optocoupler through the fourth resistor, and the collector of the second optocoupler outputs a zero point detection signal through the sixth resistor; the emitter of the second optocoupler is grounded.

7. The node communication device according to claim 6, characterized in that: The second zero point detection circuit also includes a capacitor, wherein one end of the capacitor is connected between the sixth resistor and the zero point signal output end, and the other end of the capacitor is grounded.

8. The node communication device according to any one of claims 1 to 7, characterized in that: The controlled end also includes: a temperature detector and a voltage detector; wherein the temperature detector and the voltage detector are respectively connected to the second controller.

9. A node communication system, characterized in that: It comprises the node communication device and gateway as described in any one of claims 1 to 8.

10. The node communication system according to claim 9, characterized in that: Also includes: Cloud server and mobile A, i.e., client; wherein, mobile A, i.e., client is connected to the gateway via the cloud server, and the gateway is connected to the main control end of the node communication device.

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