One-way communication device based on power line

Abstract

In order to solve the problem of high cost of communication devices in the prior art, the present disclosure provides a single-phase communication device based on a power line to reduce the cost of the device. It includes a main device control module, a power supply circuit, a rectifier circuit, an input voltage conversion circuit and a slave device; the power supply circuit is connected to the main device control module, and is used to receive the control signal output by the main device control module, and switch the power supply polarity according to the control signal; the rectifier circuit is electrically connected to the power supply circuit and the slave device respectively, and is used to convert the electric energy output by the power supply circuit into direct current electric energy, and transmit the direct current electric energy to the slave device; the input voltage conversion circuit is electrically connected to the power supply circuit and the slave device respectively, and is used to convert the level signal output by the power supply circuit into a low-level signal that can be received by the slave device. The technical solution disclosed in the present disclosure can realize the power supply and communication of the slave device by the main device control module only through the power line connection, which is simple to implement and reduces the cost.

Description

Technical Field

[0001] The present disclosure relates to a communication device, and more particularly to a one-way communication device based on a power line. Background Art

[0002] Currently, various communication methods on the market, such as wireless WiFi, Bluetooth, infrared, or wired UART, CAN, etc., all require additional wireless communication modules or additional communication cables. In some scenarios where only one-way, low-speed communication is required, these existing methods are costly and complex to implement. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present disclosure provides a single-way communication device based on a power line to reduce the cost of the device.

[0004] In order to achieve the above-mentioned object, the unidirectional communication device based on the power line of the present disclosure includes a master device control module, a power supply circuit, a rectifier circuit, an input voltage conversion circuit and a slave device;

[0005] The power supply circuit is connected to the main equipment control module, and is used to receive the control signal output by the main equipment control module, and switch the power supply polarity according to the control signal;

[0006] The rectifier circuit is electrically connected to the power supply circuit and the slave device respectively, and is used to convert the electric energy output by the power supply circuit into direct current electric energy, and transmit the direct current electric energy to the slave device;

[0007] The input voltage conversion circuit is electrically connected to the power supply circuit and the slave device respectively, and is used for converting the level signal output by the power supply circuit into a low level signal that can be received by the slave device.

[0008] Optionally, the power supply circuit includes a VCC terminal, a GND terminal, a first NMOS transistor, a second NMOS transistor, a third NMOS transistor and a fourth NMOS transistor;

[0009] The VCC terminal, the first NMOS tube, the third NMOS tube and the GND terminal are connected in series in sequence;

[0010] The VCC terminal, the second NMOS transistor, the fourth NMOS transistor and the GND terminal are connected in series in sequence;

[0011] The common connection end of the first NMOS tube and the third NMOS tube and the common connection end of the second NMOS tube and the fourth NMOS tube are electrically connected to the rectifier circuit through a power line as the output end of the power supply circuit;

[0012] The master device control module includes four control pins, and the four control pins are respectively connected to the gate of the first NMOS tube, the gate of the second NMOS tube, the gate of the third NMOS tube and the gate of the fourth NMOS tube in a one-to-one correspondence.

[0013] Optionally, the rectifier circuit includes a rectifier bridge;

[0014] The rectifier bridge comprises a first input pin, a second input pin, a negative output pin and a positive output pin;

[0015] The first input pin and the second input pin are electrically connected to the power supply circuit through a power line as input ends of the rectifier circuit;

[0016] The negative output pin is connected to the power pin of the slave device;

[0017] The positive output pin is connected to the ground pin of the slave device.

[0018] Optionally, a capacitor is connected between the negative output pin and the positive output pin.

[0019] Optionally, the input voltage conversion circuit includes a first resistor, a second resistor and a triode;

[0020] One end of the first resistor is connected to the power supply end of the slave device, and the other end of the first resistor is connected to the base of the transistor;

[0021] One end of the second resistor is connected to the power supply circuit through one of the power lines, and the other end of the second resistor is connected to the collector of the transistor;

[0022] The emitter of the transistor is connected to the ground terminal of the slave device, and the collector of the transistor is connected to the signal input terminal of the slave device.

[0023] In the technical solution disclosed in the present invention, the main device control module and the power supply circuit are the host control part, and the rectifier circuit, the input voltage conversion circuit and the slave device are the slave device receiving part; the host control part and the slave device receiving part only need to be connected through a power cord, without the need for communication cables or wireless communication modules, so that the main device control module can realize power supply and communication (one-way communication) with the slave device; the cost is low and the implementation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0025] Figure 1 is a connection diagram of a single communication device in an exemplary embodiment of the present disclosure;

[0026] Figure 2 is a circuit connection diagram of a single communication device in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] like Figure 1 and Figure 2 As shown, a unidirectional communication device based on a power line includes a master device control module 1, a power supply circuit 2, a rectifier circuit 3, an input voltage conversion circuit 4 and a slave device 3;

[0030] The power supply circuit 2 is connected to the main device control module 1, and is used to receive the control signal output by the main device control module 1, and switch the power supply polarity according to the control signal;

[0031] The rectifier circuit 3 is electrically connected to the power supply circuit 2 and the slave device 3 respectively, and is used to convert the electric energy output by the power supply circuit 2 into direct current electric energy, and transmit the direct current electric energy to the slave device 3;

[0032] The input voltage conversion circuit 4 is electrically connected to the power supply circuit 2 and the slave device 3 respectively, and is used for converting the level signal output by the power supply circuit 2 into a low level signal that can be received by the slave device 3 .

[0033] In the technical solution disclosed in this embodiment, the power supply circuit 2 receives the control of the main device control module 1 and switches the power supply polarity; the rectifier circuit 3 converts the electric energy output by the power supply circuit 2 into DC electric energy, so that the power supply circuit 2 can supply power to the slave device 3, and the input voltage conversion circuit 4 converts the level signal output by the power supply circuit 2 into a low level signal that can be received by the slave device 3, so that the power supply circuit 2 can communicate with the slave device 3.

[0034] In the technical solution disclosed in this embodiment, the main device control module 1 and the power supply circuit 2 are the host control part, and the rectifier circuit 3, the input voltage conversion circuit 4 and the slave device 3 are the slave device receiving part; the host control part and the slave device receiving part only need to be electrically connected through a power cord, without the need for communication cables or wireless communication modules, so that the main device control module 1 can realize power supply and communication (one-way communication) with the slave device 3; the cost is low and the implementation is simple.

[0035] As an optional implementation, Figure 1 and Figure 2 As shown, the power supply circuit 2 includes a VCC power supply terminal, a GND ground terminal, a first NMOS transistor Q5, a second NMOS transistor Q6, a third NMOS transistor Q7 and a fourth NMOS transistor Q8;

[0036] The VCC power supply terminal, the first NMOS transistor Q5, the third NMOS transistor Q7 and the GND ground terminal are connected in series in sequence;

[0037] The VCC power supply terminal, the second NMOS transistor Q6, the fourth NMOS transistor Q8 and the GND ground terminal are connected in series in sequence;

[0038] The common connection end of the first NMOS transistor Q5 and the third NMOS transistor Q7 and the common connection end of the second NMOS transistor Q6 and the fourth NMOS transistor Q8 are electrically connected to the rectifier circuit 3 through the power line S as the output end of the power supply circuit 2;

[0039] The master device control module 1 includes four control pins, which are respectively connected to the gate of the first NMOS transistor Q5, the gate of the second NMOS transistor Q6, the gate of the third NMOS transistor Q7 and the gate of the fourth NMOS transistor Q8 in a one-to-one correspondence.

[0040] Among them, Figure 2 As shown, the VCC power supply terminal, the first NMOS tube Q5, the third NMOS tube Q7 and the GND grounding terminal are connected in series in sequence; that is, the VCC power supply terminal is connected to the D pole of the first NMOS tube Q5, the S pole of the first NMOS tube Q5 is connected to the D pole of the third NMOS tube Q7, and the S pole of the third NMOS tube Q7 is connected to the GND grounding terminal. The VCC power supply terminal, the second NMOS tube Q6, the fourth NMOS tube Q8 and the GND grounding terminal are connected in series in sequence; that is, the VCC power supply terminal is connected to the D pole of the second NMOS tube Q6, the S pole of the second NMOS tube Q6 is connected to the D pole of the fourth NMOS tube Q8, and the S pole of the fourth NMOS tube Q8 is connected to the GND grounding terminal. In this article, the G pole is the gate, the S pole is the source, the D pole is the drain,

[0041] Among them, Figure 2 As shown, the four control pins of the main device control module 1 include pin S1, pin S2, pin S3, and pin S4 respectively; pin S1 is connected to the gate of the first NMOS tube Q5; pin S2 is connected to the gate of the second NMOS tube Q6; pin S3 is connected to the gate of the third NMOS tube Q7; pin S4 is connected to the gate of the fourth NMOS tube Q8;

[0042] The main device control module 1 controls the third NMOS tube Q6 and the third NMOS tube Q7 to be turned on, and the third NMOS tube Q5 and the third NMOS tube Q8 to be turned off; or controls the third NMOS tube Q5 and the third NMOS tube Q8 to be turned on, and the third NMOS tube Q6 and the third NMOS tube Q7 to be turned off; and realizes the switching of the power supply polarity of the D pole of the third NMOS tube Q5 and the D pole of the third NMOS tube Q6.

[0043] As an optional implementation, Figure 2 As shown, the rectifier circuit 3 includes a rectifier bridge BD1;

[0044] The rectifier bridge includes a first input pin P1, a second input pin P2, a negative output pin P3 and a positive output pin P4;

[0045] The first input pin P1 and the second input pin P2 are used as input terminals of the rectifier circuit 3 and are electrically connected to the power supply circuit 2 through the power line S;

[0046] The negative output pin P3 is connected to the power pin V1 of the slave device 3;

[0047] The positive output pin P4 is connected to the ground pin G1 of the slave device 3 .

[0048] The function of converting the electric energy output by the power supply circuit 2 into direct current electric energy is realized by the rectifier bridge.

[0049] As an optional implementation, Figure 2 As shown, a capacitor C5 is connected between the negative output pin P3 and the positive output pin P4; the capacitor C5 is used for filtering, and the power supply from the device 3 is taken from both ends of the capacitor C5.

[0050] As an optional implementation, Figure 2 and Figure 2 As shown, the input voltage conversion circuit 4 includes a first resistor R16, a second resistor R17 and a transistor Q9;

[0051] One end of the first resistor R16 is connected to the power supply terminal of the slave device 3, and the other end of the first resistor R16 is connected to the base of the transistor Q9;

[0052] One end of the second resistor R17 is connected to the power supply circuit 2 through one of the power lines S, and the other end of the second resistor R17 is connected to the collector of the transistor Q9; it can be known that the power line here is the same as the power line in the previous text; specifically, one end of the second resistor R17 can be set at the second input pin P2 of the rectifier bridge BD1 to realize the connection of the power supply circuit through one of the power lines.

[0053] The emitter of the transistor Q9 is connected to the ground terminal of the slave device 3 , and the collector of the transistor Q9 is connected to the signal input terminal of the slave device 3 .

[0054] Here, the power supply terminal of the slave device 3 refers to the VDD power supply of the slave device 3, which can be connected to the power supply pin V1 of the slave device, or to the positive output pin P4 of the rectifier bridge, etc.; here, the ground terminal of the slave device 3 refers to the reference ground SGND of the slave device 3, which can be connected to the ground pin G1 of the slave device, or to the negative output pin P3 of the rectifier bridge, etc.

[0055] When the end of R17 away from transistor Q9 is at a high level, transistor Q9 is turned on and a low level signal is received from the signal input end of device 3; when the end of R17 away from transistor Q9 is at a high level, transistor Q9 is turned off and a high level signal is received from the signal input end of device 3; and then, the signal input end of device 3 can receive a signal by simply controlling the level of the end of R17 away from transistor Q9. It can be known that Figure 2 The VDD connected to the first resistor R16 is a high level signal that can be received by the GPIO pin of the slave device 3 , and the SGND connected to the transistor Q9 is a low level signal that can be received by the GPIO pin of the slave device 3 .

[0056] This embodiment uses Figure 2 Take the circuit in the figure as an example for further explanation.

[0057] like Figure 1 and Figure 2 As shown, in normal operation, the GPIO of slave device 3 (IC) is expected to receive a high level. The master device control module 1 controls Q6 and Q7 to turn on, and Q5 and Q8 to turn off. In this way, when the power reaches the slave device, point P1 of the rectifier bridge is the positive pole of the power supply, and point P2 is the negative pole of the power supply. At this time, in the rectifier bridge, diodes A and C are turned on, and diodes B and D are turned off. Therefore, at this time, P2-P3≈-0.7V, which is equivalent to the reverse bias of the BE junction of transistor Q9, so transistor Q9 is turned off, and the level received by slave device 3 (IC) is a high level.

[0058] When the master device control module 1 needs to pull the level received by the GPIO of the slave device 3 (IC): the master device control module 1 switches the control logic to turn on Q5 and Q8, and turn off Q6 and Q7. In this way, when the power reaches the slave device 3, the P1 point of the rectifier bridge is the negative pole of the power supply, and the P2 point is the positive pole of the power supply. At this time, in the rectifier bridge, diodes A and C are cut off, and diodes B and D are turned on. Therefore, at this time, P2-P3≈VCC. Therefore, the BE junction of the transistor Q9 is forward biased, and the transistor Q9 is turned on. At this time, the level received by the terminal IC is a low level.

[0059] In summary, the master device control module 1 switches the polarity, and the slave device 3 can receive high and low level signals accordingly while maintaining power supply. Therefore, as long as the baud rate of communication and timing sampling are agreed upon between the master and slave devices 3, the receiving end can receive the control command, thereby realizing communication from the master device to the slave device 3.

[0060] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A one-way communication device based on a power line, characterized in that: It includes a master device control module, a power supply circuit, a rectifier circuit, an input voltage conversion circuit and a slave device; The power supply circuit is connected to the main device control module, and is used to receive the control signal output by the main device control module, and switch the power supply polarity according to the control signal; wherein the power supply circuit includes a VCC terminal, a GND terminal, a first NMOS tube, a second NMOS tube, a third NMOS tube and a fourth NMOS tube; The VCC terminal, the first NMOS tube, the third NMOS tube and the GND terminal are connected in series in sequence; The VCC terminal, the second NMOS transistor, the fourth NMOS transistor and the GND terminal are connected in series in sequence; The common connection end of the first NMOS tube and the third NMOS tube and the common connection end of the second NMOS tube and the fourth NMOS tube are electrically connected to the rectifier circuit through a power line as the output end of the power supply circuit; The master device control module includes four control pins, and the four control pins are respectively connected to the gate of the first NMOS tube, the gate of the second NMOS tube, the gate of the third NMOS tube, and the gate of the fourth NMOS tube in a one-to-one correspondence; The rectifier circuit is electrically connected to the power supply circuit and the slave device respectively, and is used to convert the electric energy output by the power supply circuit into direct current electric energy, and transmit the direct current electric energy to the slave device; The input voltage conversion circuit is electrically connected to the power supply circuit and the slave device respectively, and is used to convert the level signal output by the power supply circuit into a low level signal that can be received by the slave device; wherein the input voltage conversion circuit includes a first resistor, a second resistor and a transistor.

2. The device according to claim 1, characterized in that The rectifier circuit includes a rectifier bridge; The rectifier bridge comprises a first input pin, a second input pin, a negative output pin and a positive output pin; The first input pin and the second input pin are electrically connected to the power supply circuit through a power line as input ends of the rectifier circuit; The negative output pin is connected to the power pin of the slave device; The positive output pin is connected to the ground pin of the slave device.

3. The device according to claim 2, characterized in that A capacitor is connected between the negative output pin and the positive output pin.

4. The device according to claim 1, characterized in that One end of the first resistor is connected to the power supply end of the slave device, and the other end of the first resistor is connected to the base of the transistor; One end of the second resistor is connected to the power supply circuit through one of the power lines, and the other end of the second resistor is connected to the collector of the transistor; The emitter of the transistor is connected to the ground terminal of the slave device, and the collector of the transistor is connected to the signal input terminal of the slave device.

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