CN209823751U - A system that transmits data by chopping DC power lines - Google Patents

Abstract

The utility model discloses a system for transmitting data through chopping of a DC power line, comprising a main controller and a slave controller, wherein the main controller comprises a host MCU, a data receiving circuit, a host data sending circuit and a power conversion module, and the slave controller comprises a slave MCU, a data acquisition circuit, a slave data sending circuit, a power reverse connection protection module and a voltage stabilizing module, and the power conversion module is connected to the power reverse connection protection module through a power line and a ground line. The utility model adopts two lines to realize the functions of power supply and communication, which can save more costs compared with three lines, and the two lines can be connected forwardly and reversely at will, which can solve the problem of burning equipment due to reverse power connection in engineering applications.

Description

A system that transmits data by chopping DC power lines

technical field

The utility model relates to the technical field of data transmission, in particular to a system for chopping and transmitting data through a DC power line.

Background technique

At present, if the power supply and communication between the main control board and the slave control board need to be realized, three wires are generally required, namely: power wire, ground wire, and data wire. When the communication distance between the two is short or there are only two wires due to engineering wiring The device cannot be installed properly.

During the experiment, it was found that the above functions can be completed by using only two wires, and the use of two wires to realize power supply and communication functions can save costs more than three wires. The two wires can be connected forward and reverse at will, which can solve the problem of burning out equipment caused by reverse power supply in engineering applications.

Utility model content

The purpose of this utility model is to provide a system for chopping and transmitting data through a DC power line, so as to solve the problems raised in the background technology.

To achieve said purpose, the utility model provides the following technical solutions:

A system for chopping and transmitting data through a DC power line, including a master controller and a slave controller, the master controller includes a host MCU, a data receiving circuit, a host data sending circuit and a power conversion module, and the slave controller includes a slave MCU, data acquisition circuit, slave data transmission circuit, power reverse connection protection module and voltage stabilizing module, the power conversion module is respectively connected to the power supply reverse connection protection module, data receiving circuit and host data transmission circuit through the power line, and the data receiving circuit is also Connect to the host MCU, the host MCU is also connected to the host data transmission circuit, the power supply reverse connection protection module is connected to the voltage stabilization module, the data acquisition circuit and the slave data transmission module respectively through the power line, the data acquisition circuit is also connected to the slave MCU, and the slave MCU is also connected to the slave MCU. Connect the slave data sending module, a ground wire is provided between the power conversion module and the power reverse connection protection module, and a ground wire is provided between the power reverse connection protection module and the voltage stabilizing module.

As a further solution of the present invention: the data receiving circuit includes a current limiting module and a voltage conversion and comparison module.

As a further solution of the present invention: the input end of the current limiting module is connected to the power conversion module, the output end of the current limiting module is connected to the input end of the voltage conversion comparison module, and the output end of the voltage conversion comparison module is connected to the MCU.

As a further solution of the utility model: the slave data sending module includes a current limiting module and a chopper circuit.

As a further solution of the present invention: the input end of the current limiting module is connected to the power reverse connection protection module, the output end of the current limiting module is connected to the input end of the chopper circuit, and the output end of the chopper circuit is connected to the slave MCU.

Compared with the prior art, the beneficial effect of the utility model is: the utility model uses two wires to realize the functions of power supply and communication, which can save costs compared with three wires, and the two wires can be connected forward and reverse at will, which can solve the problem of engineering In the application, the reverse power supply leads to the problem of burning out the device.

Description of drawings

Fig. 1 is the interrelation diagram of four kinds of voltages of the utility model.

Fig. 2 is a block diagram of the utility model.

Figure 3 is a schematic diagram of the data receiving circuit.

Figure 4 is a schematic diagram of the slave data sending circuit.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment 1: Please refer to Figures 1-4, a system for chopping and transmitting data through a DC power line, including a master controller and a slave controller, and the master controller includes a host MCU, a data receiving circuit, and a host data sending circuit And the power conversion module, the slave controller includes the slave MCU, data acquisition circuit, slave data transmission circuit, power reverse connection protection module and voltage stabilization module, the power conversion module is connected to the power reverse connection protection module through the power line and ground wire, such as As shown in Figure 1, only two wires are needed to complete the power supply and communication functions. The power reverse connection protection module is connected to the voltage stabilization module through the power wire and the ground wire, and the power conversion module is also connected to the data receiving circuit through the power wire. Connect the host MCU, the host MCU is also connected to the host data transmission circuit, the power reverse connection protection module is also connected to the data acquisition circuit through the power line, the data acquisition circuit is also connected to the slave MCU, and the slave MCU is also connected to the slave data transmission module. Through the above structure, only two wires are used to realize the power supply and communication functions, which is more cost-effective than three wires. The two wires can be connected in any direction, no worries about wrong connections, high installation efficiency, and can solve engineering applications. The problem of burning out the equipment caused by reverse power supply.

The circuit of the present invention has the following voltage values, which are described as follows: GND: the power ground of the main controller and the slave controller, the voltage is 0V; -5V; VCC2: This voltage is the low-level voltage when data is transmitted on the power line; VCC3: This voltage is the high-level voltage when data is transmitted on the power line; the relationship between the above four voltage values is: GND <VCC1<VCC2<VCC3.

Embodiment 2, on the basis of Embodiment 1, the data receiving circuit of this design includes a current limiting module and a voltage conversion comparison module. The input end of the current limiting module is connected to the power conversion module, the output end of the current limiting module is connected to the input end of the voltage conversion comparison module, and the output end of the voltage conversion comparison module is connected to the MCU. The slave data sending module includes a current limiting module and a chopper circuit. The input end of the current limiting module is connected to the power supply reverse connection protection module, the output end of the current limiting module is connected to the input end of the chopper circuit, and the output end of the chopper circuit is connected to the slave MCU.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. A system for transmitting data through direct current power line chopping comprises a master controller and a slave controller, and is characterized in that the master controller comprises a master MCU, a data receiving circuit, a master data transmitting circuit and a power conversion module, the slave controller comprises a slave MCU, a data acquiring circuit, a slave data transmitting circuit, a power reverse connection protection module and a voltage stabilizing module, the power conversion module is respectively connected with the power reverse connection protection module, the data receiving circuit and the master data transmitting circuit through power lines, the data receiving circuit is also connected with the master MCU, the master MCU is also connected with the master data transmitting circuit, the power reverse connection protection module is respectively connected with the voltage stabilizing module, the data acquiring circuit and the slave data transmitting module through power lines, the data acquiring circuit is also connected with the slave MCU, the slave MCU is also connected with the slave data transmitting module, and a ground wire is arranged between the power conversion module and the power reverse connection, and a ground wire is arranged between the power supply reverse connection protection module and the voltage stabilizing module.

2. The system for transmitting data via dc power line chopping of claim 1, wherein the data receiving circuit comprises a current limiting module and a voltage conversion comparison module.

3. The system for transmitting data through direct current power line chopping according to claim 2, wherein an input end of the current limiting module is connected with the power conversion module, an output end of the current limiting module is connected with an input end of the voltage conversion comparison module, and an output end of the voltage conversion comparison module is connected with the MCU.

4. The system for transmitting data through direct current power line chopping according to claim 1, wherein the slave data transmission module comprises a current limiting module and a chopper circuit.

5. The system for transmitting data through DC power line chopping according to claim 4, wherein the input end of the current limiting module is connected to the power reverse connection protection module, the output end of the current limiting module is connected to the input end of the chopper circuit, and the output end of the chopper circuit is connected to the slave MCU.