CN218387499U - Network transmission system with surge protection based on PLC carrier - Google Patents

Abstract

The application discloses a network transmission system with surge protection based on PLC carrier, which comprises a transmitter and a receiver; the receiver includes: the data input module, the data processing module and the signal conversion module are used for converting the processed data into OFDM signals; the first power supply module is used for accessing a direct-current power supply; the first voltage conversion module is used for performing voltage reduction processing on the first voltage accessed by the first power supply module and then distributing the first voltage to the data processing module and the signal conversion module; the first transmission module is used for transmitting the OFDM signals output by the signal conversion module to a transmitter; and the first surge protection circuit and the second surge protection circuit are used for absorbing and releasing over-high voltage when inductive lightning interference occurs between the first power supply module and the first voltage conversion module. The application has the advantages that: the network transmission system based on the PLC carrier wave with the surge protection ensures normal transmission of network data when the inductive lightning interference occurs through the surge protection circuit.

Description

Network transmission system with surge protection based on PLC carrier

Technical Field

The application relates to the field of network transmission equipment, in particular to a network transmission system based on PLC carrier wave with surge protection.

Background

Network transmission refers to the process of communicating according to a network transmission protocol with a series of lines (optical fibers, twisted pair, etc.) through a circuit's adjustment changes. In which network transmission requires a medium, i.e. a physical path between a sender and a receiver in the network, which has some impact on the data communication of the network. Common transmission media are: twisted pair, coaxial cable, fiber optics, and wireless transmission media. Network protocols are some specifications for the transfer, management, of information in networks, including the internet.

In order to ensure that the equipment is used more stably in a complex environment, the surge protection of the equipment is required; due to the fact that thunderstorm weather is more in summer, the probability of lightning strike on a product is increased, and hardware or software of equipment is failed due to induced lightning on the equipment in the period, so that network data are abnormal.

SUMMERY OF THE UTILITY MODEL

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

In order to solve the technical problems mentioned in the background section above, some embodiments of the present application provide a network transmission system with surge protection based on a PLC carrier, including a transmitter and a receiver connected at least by a signal; the receiver includes: the data input module is used for receiving network data to be transmitted; the data processing module is used for modulating the network data received by the data input module; the signal conversion module is used for converting the data after modulation processing into OFDM signals; the first power supply module is used for accessing a direct-current power supply; the first voltage conversion module is used for carrying out voltage reduction processing on the first voltage accessed by the first power supply module and then directly or indirectly distributing the first voltage to the data processing module and the signal conversion module; the first transmission module is used for transmitting at least the OFDM signal output by the signal conversion module to a transmitter; the data input module is in signal connection with the data processing module, and the data processing module, the signal conversion module and the first transmission module are in signal connection in sequence; the first voltage conversion module is directly or indirectly electrically connected to the data processing module and the signal conversion module; the receiver further comprises: the first surge protection circuit is used for absorbing and releasing over-high voltage when inductive lightning interference occurs between the first power supply module and the first voltage conversion module; the second surge protection circuit is used for absorbing residual voltage output by the first surge protection circuit; the first surge protection circuit and the second surge protection circuit are electrically connected between the first power supply module and the first voltage conversion module.

Further, the receiver further includes: the third surge protection circuit is used for absorbing and discharging over-high voltage when inductive lightning interference occurs between the signal conversion module and the first transmission module; the third surge protection circuit is connected between the signal conversion module and the first transmission module through signals.

Further, the receiver further includes: the first common-mode protection circuit is used for absorbing and discharging over-high voltage when inductive lightning interference occurs between the data input module and the data processing module; the first common mode protection circuit is connected between the data input module and the data processing module through signals.

Further, the data processing module comprises: the first main chip is used for modulating the network data received by the data input module; the first Flash chip is used for storing a program file; the first main chip is in signal connection with the first Flash chip.

Further, the data input module comprises: the first RJ45 port is in signal connection with the first network transformer, and the first network transformer is connected with the first main chip through a first common mode protection circuit.

Further, the signal conversion module includes: a first operational amplifier and a first coupler; the first main chip is connected to the first transmission module through the first operational amplifier, the first coupler and the third surge protection circuit in sequence.

Further, the first voltage conversion module includes: the first power supply chip is used for carrying out voltage reduction processing on a first voltage accessed by the first power supply module to obtain a second voltage; the first power supply chip is electrically connected with the first power supply module through the first surge protection circuit and the second surge protection circuit, and the first power supply chip is directly or indirectly electrically connected with the first main chip and the first Flash chip respectively.

Further, the receiver further comprises: the first monitoring module is used for cutting off the voltage input of the first power supply chip to the first main chip and the first Flash chip when the abnormal work of the first main chip is monitored; the first monitoring module is in signal connection with the first main chip, is electrically connected with the first power supply chip, and is directly or indirectly electrically connected with the first main chip and the first Flash chip respectively.

Furthermore, the first transmission module comprises a first mixed port, and the first mixed port is connected with the signal and the power supply of the transmitter in a co-cable co-transmission mode; a first isolation circuit is connected between the first mixing port and the first power module, and the first mixing port is in signal connection with the first coupler through a third surge protection circuit.

Further, the transmitter includes: the second transmission module is used for providing a second mixed port to form power supply and signal connection with the first transmission module; the signal compensation module is used for amplifying and restoring the OFDM signal received by the second mixing port; the data reading module is used for demodulating the signal amplified and reduced by the signal compensation module into a TCP/IP signal; the data output module is used for outputting TCP/IP signals; the second power supply module is used for accessing the direct-current power supply received by the first mixed port; the second voltage conversion module is used for performing voltage reduction processing on the direct-current power supply accessed by the second power supply module and then distributing the direct-current power supply to the data interpretation module and the signal compensation module; the second mixing port, the signal compensation module and the data reading module are sequentially in signal connection; the second voltage conversion module is directly or indirectly electrically connected to the data interpretation module and the signal compensation module; a second isolation circuit is connected between the second hybrid port and the second power supply module; a fourth surge protection circuit and a fifth protection circuit are connected between the second power module and the second voltage conversion module, a second common mode protection circuit is connected between the data reading module and the data output module, and a sixth surge protection circuit is connected between the second mixing port and the signal compensation module.

The beneficial effect of this application lies in: the network transmission system based on PLC carrier wave surge protection is provided, wherein the normal transmission of network data is ensured through a surge protection circuit when inductive lightning interference occurs.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and the description of the exemplary embodiments of the present application are provided for explaining the present application and do not constitute an undue limitation on the present application.

Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

fig. 1 is a schematic diagram of a network transmission system based on PLC carrier with surge protection according to an embodiment of the present application;

fig. 2 is a block diagram illustrating a receiver structure in a network transmission system based on PLC carrier with surge protection according to an embodiment of the present application;

fig. 3 is a schematic block diagram of a transmitter in a network transmission system based on PLC carrier with surge protection according to an embodiment of the present application;

the reference numerals have the meanings:

100. a network transmission system;

200. a receiver;

210. a data input module; 211. a first RJ45 port; 212. a first network transformer;

220. a data processing module; 221. a first main chip; 222. a first Flash chip;

230. a signal conversion module; 231. a first operational amplifier; 232. a first coupler;

240. a first power supply module; 241. a first power input port;

250. a first voltage conversion module; 251. a first power supply chip;

260. a first transmission module; 261. a first mixing port;

271. a first isolation circuit; 272. a first power output port;

280. a first monitoring module; 281. a first embedded controller;

291. a first surge protection circuit; 292. a second surge protection circuit; 293. a third surge protection circuit; 294. a first common mode protection circuit;

300. a transmitter;

310. a data output module; 311. a second RJ45 port; 312. a second network transformer;

320. a data interpretation module; 321. a second main chip; 322. a second Flash chip;

330. a signal compensation module; 331. a second operational amplifier; 332. a second coupler;

340. a second power supply module; 341. a second power input port;

350. a second voltage conversion module; 351. a second power supply chip;

360. a second transmission module; 361. a second mixing port;

371. a second isolation circuit; 372. a second power output port;

380. a second monitoring module; 381. a second embedded controller;

391. a fourth surge protection circuit; 392. a fifth surge protection circuit; 393. a sixth surge protection circuit; 394. a second common mode protection circuit.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It is noted that references to "a" or "an" modification in this application are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that references to "one or more" are intended to be exemplary unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the PLC-based network transmission system 100 with surge protection includes a receiver 200 and a transmitter 300, where the transmitter 300 and the receiver 200 are used in pairs, and after the two are connected as shown in fig. 1, one of the receiver 200 and the transmitter 300 is powered on or both are powered on; in this embodiment, the receiver 200 is powered by DC12-48V, and the power supply is divided into two paths, one path supplies power to the receiver 200, and the other path supplies power to the transmitter 300 through cable transmission together with signals.

As shown in fig. 2, as a specific scheme, the receiver 200 includes: the data input module 210, the data processing module 220, the signal conversion module 230, the first power module 240, the first voltage conversion module 250, and the first transmission module 260.

The data processing module 220 is in signal connection with the data input module 210, the data input module 210 is used for receiving network data to be transmitted, and then the data processing module 220 modulates the network data received by the data input module 210; the data processing module 220, the signal conversion module 230 and the first transmission module 260 are sequentially in signal connection, and the signal conversion module 230 is configured to convert the modulated data into an OFDM signal and output the OFDM signal to the first transmission module 260; the first voltage conversion module 250 is directly or indirectly electrically connected to the data processing module 220 and the signal conversion module 230, the first power module 240 is used for accessing a direct current power supply, and then the first voltage conversion module 250 directly or indirectly distributes the direct current power supply accessed by the first power module 240 to the data processing module 220 and the signal conversion module 230 after performing voltage reduction processing on the direct current power supply; the first transmission module 260 is configured to transmit the OFDM signal output by the dc power supply and signal conversion module 230 to the transmitter 300.

As shown in fig. 2, as a specific solution, the first power supply module 240 includes a first power supply input port 241, and the first power supply input port 241 is connected to DC12-48V.

As shown in fig. 2, as a specific scheme, the data processing module 220 includes: a first main chip 221 and a first Flash chip 222; the first main chip 221 is in signal connection with the first Flash chip 222, the first main chip 221 is configured to modulate network data received by the data input module 210, and the first Flash chip 222 is configured to store a program file.

As shown in fig. 2, as a specific solution, the data input module 210 includes: a first RJ45 port 211 and a first network transformer 212, the first RJ45 port 211 is in signal connection with the first network transformer 212, and the first network transformer 212 is in signal connection between the first RJ45 port 211 and the first main chip 221.

As shown in fig. 2, as a specific solution, the signal conversion module 230 includes: a first operational amplifier 231 and a first coupler 232; the first main chip 221 is signal-connected to the first transmission module 260 through the first operational amplifier 231 and the first coupler 232 in sequence.

As shown in fig. 2, as a specific scheme, the first transmission module 260 includes a first hybrid port 261, where the first hybrid port 261 is in signal connection with the first coupler 232, and is in signal and power connection with the transmitter 300 in a co-cable co-transmission manner, so as to perform data transmission while supplying power to the transmitter 300; a first isolation circuit 271 is connected between the first hybrid port 261 and the first power input port 241 to isolate interference in the input power line and ensure that excessive voltage does not enter the device signal port.

As shown in fig. 2, as a specific solution, the first voltage conversion module 250 includes a first power supply chip 251; the first power supply chip 251 is electrically connected with the first power supply input port 241, and a first voltage input by the first power supply input port supplies power to the first operational amplifier 231 and the first power supply chip 251 respectively, and is 12V as an optional value of the first voltage; the first power supply chip 251 performs voltage reduction processing on the dc power supply connected to the first power supply input port 241 to obtain a second voltage, which is an optional value of the second voltage and is 3.3V; the first power supply chip 251 is electrically connected to the first main chip 221 and the first Flash chip 222 through a first power output port 272, and respectively supplies power to the first main chip 221 and the first Flash chip 222.

As shown in fig. 2, as a preferable scheme, the receiver 200 further includes a first monitoring module 280, configured to cut off voltage input of the first power chip 251 to the first main chip 221 and the first Flash chip 222 when it is monitored that the first main chip 221 operates abnormally; specifically, the first monitoring module 280 includes a first embedded controller 281, the first embedded controller 281 is in signal connection with the first main chip 221, and the first embedded controller 281 is electrically connected between the first power supply chip 251 and the first power supply output port.

As shown in fig. 2, preferably, the receiver 200 further includes a first surge protection circuit 291, a second surge protection circuit 292, a third surge protection circuit 293 and a first common mode protection circuit 294; the first surge protection circuit adopts discharge pipeline and line surge protection, the second surge protection circuit 292 adopts piezoresistor line and line, line and ground surge protection, the first surge protection circuit and the second surge protection circuit 292 are electrically connected between the first power input port 241 and the first power chip in sequence, the first surge protection circuit absorbs and releases over-high voltage when inductive lightning interference occurs between the first power input port 241 and the first power chip, and then the second surge protection circuit 292 absorbs residual voltage output by the first surge protection circuit; the third surge protection circuit 293 adopts surge protection of a voltage dependent resistor line and a line, a discharge line and the ground, and is connected between the first coupler 232 and the first hybrid port 261 in signal mode, and is used for absorbing and discharging over-high voltage when inductive lightning interference occurs between the first coupler 232 and the first hybrid port 261; the first common mode protection circuit 294 is signal-connected between the first network transformer 212 and the first main chip 221, and is configured to absorb and discharge an excessive voltage when inductive lightning interference occurs between the first network transformer 212 and the first main chip 221.

With this arrangement, when the ports of the receiver 200 are tested for inductive lightning or the receiver 200 is in use for inductive lightning interference, the surge protection circuit and the common mode protection circuit absorb and bleed off too high voltage to ground so as to protect the receiver 200 from malfunction due to interference.

As shown in fig. 2 and 3, as a specific scheme, the transmitter 300 includes: the second transmission module 360, the signal compensation module 330, the data interpretation module 320, the data output module 310, the second power module 340, and the second voltage conversion module 350.

The second transmission module 360 comprises a second hybrid port 361, and the second hybrid port 361 and the first hybrid port 261 form a power supply and signal connection; the second mixing port 361, the signal compensation module 330 and the data interpretation module 320 are sequentially in signal connection, the signal compensation module 330 is used for amplifying and restoring the OFDM signal received by the second mixing port 361, then the data interpretation module 320 demodulates the signal amplified and restored by the signal compensation module 330 into a TCP/IP signal, and the data output module 310 is used for outputting the TCP/IP signal; the second power module 340 is configured to access a dc power received by the second hybrid port 361; the second voltage converting module 350 is directly or indirectly electrically connected to the data interpretation module 320 and the signal compensating module 330, and the second voltage converting module 350 is configured to step down the dc power received by the second power module 340 and then directly or indirectly distribute the dc power to the data interpretation module 320 and the signal compensating module 330.

As shown in fig. 3, as a specific solution, the second power module 340 includes a second power input port 341, a second isolation circuit 371 is connected between the second power input port 341 and the second hybrid port 361, and the second power input port 341 is connected to DC12-48V provided by the second hybrid port 361.

As shown in fig. 3, as a specific scheme, the signal compensation module 330 includes: a second operational amplifier 331 and a second coupler 332; the second coupler 332 is in signal connection between the second operational amplifier 331 and the second hybrid port 361.

As shown in fig. 3, as a specific solution, the data interpretation module 320 includes: a second main chip 321 and a second Flash chip 322; the second hybrid port 361 is connected to the second main chip 321 through the second coupling and the second operational amplifier 331 in sequence, and the second main chip 321 is configured to demodulate a signal output by the second operational amplifier 331 and output a TCP/IP signal; the second Flash chip 322 is connected to the second main chip 321 through signals, and the second Flash chip 322 is used for storing program files.

As shown in fig. 3, as a specific scheme, the data output module 310 includes: a second RJ45 port 311 and a second network transformer 312, the second RJ45 port 311 is in signal connection with the second network transformer 312, and the second network transformer 312 is connected between the second RJ45 port 311 and the second main chip 321.

As shown in fig. 3, as a specific solution, the second voltage conversion module 350 includes a second power chip 351; the second power supply chip 351 is electrically connected with the second power supply input port 341, and the third voltage input by the second power supply input port supplies power to the second operational amplifier 331 and the second power supply chip 351 respectively, and is 12V as an optional value of the third voltage; the second power chip 351 performs voltage reduction processing on the dc power supply connected to the second power input port 341 to obtain a fourth voltage, which is an optional value of the fourth voltage and is 3.3V; the second power supply chip 351 is electrically connected to the second main chip 321 and the second Flash chip 322 through the second power output port 372, and respectively supplies power to the second main chip 321 and the second Flash chip 322.

As shown in fig. 3, as a preferable scheme, the transmitter 300 further includes a second monitoring module 380, configured to cut off voltage input from the second power chip 351 to the second main chip 321 and the second Flash chip 322 when it is monitored that the second main chip 321 operates abnormally; specifically, the second monitoring module 380 includes a second embedded controller 381, the second embedded controller 381 is in signal connection with the second main chip 321, and the second embedded controller 381 is electrically connected between the second power chip 351 and the second power output port.

As shown in fig. 3, the transmitter 300 preferably further includes a fourth surge protection circuit 391, a fifth surge protection circuit 392, a sixth surge protection circuit 393, and a second common mode protection circuit 394; the fourth surge protection circuit adopts discharge pipeline and line surge protection, the fifth surge protection circuit 392 adopts piezoresistor line and line, line and ground surge protection, the fourth surge protection circuit and the fifth surge protection circuit 392 are electrically connected between the second power input port 341 and the second power chip 351 in sequence, the fourth surge protection circuit 391 is used for absorbing and releasing over-high voltage when inductive lightning interference occurs between the second power input port 341 and the second power chip 351, and then the fifth surge protection circuit 392 absorbs residual voltage output by the fourth surge protection circuit; the sixth surge protection circuit 393 adopts varistor wire and wire, discharge tube wire and ground surge protection, and its signal is connected between the second coupler 332 and the second mixing port 361, and is used for absorbing and discharging an excessive voltage when inductive lightning interference occurs between the second coupler 332 and the second mixing port 361; the second common mode protection circuit 394 is signal connected between the second network transformer 312 and the second main chip 321 for absorbing and discharging the excessive voltage when inductive lightning interference occurs between the second network transformer 312 and the second main chip 321.

With such an arrangement, when the ports of the transmitter 300 are tested for inductive lightning or the transmitter 300 is interfered by inductive lightning in use, the surge protection circuit and the common mode protection circuit absorb and discharge an excessive voltage to the ground so as to protect the transmitter 300 from malfunction due to interference.

The specific working principle is as follows: after connection is carried out according to a connection schematic diagram of a figure I, any one end of a receiving end or a sending end is supplied with power by adopting DC12-48V, a power supply is divided into two paths, one path is used for filtering interference in a power grid through an isolation circuit and then is transmitted with a signal together through a cable; the other path passes through a first surge protection circuit and a second surge protection circuit (when no inductive lightning interference exists, the partial circuits do not work and cannot influence signals, when inductive lightning interference occurs, an inductive lightning device in the protection circuits can absorb and discharge over-high voltage to the ground, so that the normal work of equipment is not influenced by the residual over-high voltage, and the power is reduced through a first power chip 251 to respectively supply power to the chips. After power-on, the Flash chip works, the whole system operates according to a set program, network data such as a camera and the like pass through the first network transformer 212 and the first common-mode protection circuit 294, the data are transmitted to the first main chip 221 to be modulated, serial data are converted into N parallel data and are distributed to N different sub-channels, after a series of processing, baseband signals are output through the first operational amplifier 231 and the first coupler 232 according to a serial mode, finally, OFDM signals are output through up-conversion, the OFDM signals are transmitted to the first mixed port 261 and loaded onto a power line, are transmitted together with a power supply through the same cable, are transmitted through two core wires and are connected with the second mixed port 361 of the transmitter 300.

The power supply of the second hybrid port 361 supplies power to the second power chip 351 through the second isolation circuit 371 and the second power input port 341 (the coupler is electrically isolated, the power supply does not enter the signal port), the power supply is converted into different voltages and respectively supplies power to different chips, after the power supply is powered on, the Flash chip works, the whole system operates according to a set program, the receiver 200 and the transmitter 300 perform signal handshake, after communication connection is established, the OFDM signal is transmitted to the transmitter 300 through any two core wires, the OFDM signal is transmitted to the second operational amplifier 331, and signal attenuation in long-distance transmission is compensated through operation processing, amplification and restoration. The amplified OFDM signal is transmitted to the second main chip 321, and data is demodulated into a TCP/IP signal by demodulation processing and then output to a computer or NVR or other terminal device.

In conclusion, if an inductive lightning exists in the signal transmission process, no matter interference enters from the two core wire ports or the power supply port of the system, multiple surge protection is designed on the two ports of the system, when the inductive lightning occurs, and the voltage at the two ends of the discharge tube exceeds the action protection voltage value, the discharge tube is changed from high resistance to low resistance, absorbs the input over-high voltage and simultaneously discharges surge energy to the ground, and then the surge protection is carried out through the piezoresistor, so that the voltage is further reduced, the residual voltage is ensured not to generate interference on a signal circuit, the protection effect is achieved, and the stable work of the product in the surge environment is ensured.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application referred to in the embodiments of the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the spirit of the application. For example, the above features and (but not limited to) the features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.

Claims (10)

1. A network transmission system with surge protection based on PLC carrier comprises a transmitter and a receiver which are at least connected through signals;

the receiver includes:

the data input module is used for receiving network data to be transmitted;

the data processing module is used for modulating the network data received by the data input module;

the signal conversion module is used for converting the data after modulation processing into OFDM signals;

the first power supply module is used for accessing a direct-current power supply;

the first voltage conversion module is used for carrying out voltage reduction processing on a first voltage accessed by the first power supply module and then directly or indirectly distributing the first voltage to the data processing module and the signal conversion module;

a first transmission module, configured to transmit at least the OFDM signal output by the signal conversion module to the transmitter;

the data input module is in signal connection with the data processing module, and the data processing module, the signal conversion module and the first transmission module are in signal connection in sequence; the first voltage conversion module is directly or indirectly electrically connected to the data processing module and the signal conversion module;

the method is characterized in that:

the receiver further comprises:

the first surge protection circuit is used for absorbing and discharging over-high voltage when inductive lightning interference occurs between the first power supply module and the first voltage conversion module;

the second surge protection circuit is used for absorbing residual voltage output by the first surge protection circuit;

the first surge protection circuit and the second surge protection circuit are electrically connected between the first power supply module and the first voltage conversion module.

2. The PLC carrier surge protection based network transmission system of claim 1, wherein:

the receiver further comprises:

the third surge protection circuit is used for absorbing and releasing over-high voltage when inductive lightning interference occurs between the signal conversion module and the first transmission module;

the third surge protection circuit is connected between the signal conversion module and the first transmission module through signals.

3. The PLC-carrier-based network transmission system with surge protection according to claim 2, wherein:

the receiver further comprises:

the first common-mode protection circuit is used for absorbing and releasing over-high voltage when inductive lightning interference occurs between the data input module and the data processing module;

the first common mode protection circuit is connected between the data input module and the data processing module through signals.

4. The PLC carrier surge protection based network transmission system of claim 3, wherein:

the data processing module comprises:

the first main chip is used for modulating the network data received by the data input module;

the first Flash chip is used for storing a program file;

and the first main chip is in signal connection with the first Flash chip.

5. The PLC-carrier-based network transmission system with surge protection according to claim 4, wherein:

the data input module includes: the first RJ45 port is in signal connection with the first network transformer, and the first network transformer is connected with the first main chip through a first common mode protection circuit.

6. The PLC-carrier-based network transmission system with surge protection according to claim 5, wherein:

the signal conversion module includes: a first operational amplifier and a first coupler; the first main chip is connected to the first transmission module through the first operational amplifier, the first coupler and the third surge protection circuit in sequence.

7. The PLC-carrier-based network transmission system with surge protection according to claim 6, wherein:

the first voltage conversion module includes:

the first power supply chip is used for carrying out voltage reduction processing on a first voltage accessed by the first power supply module to obtain a second voltage;

the first power supply chip is electrically connected with the first power supply module through the first surge protection circuit and the second surge protection circuit, and the first power supply chip is directly or indirectly electrically connected with the first main chip and the first Flash chip respectively.

8. The PLC-carrier-based network transmission system with surge protection according to claim 7, wherein:

the receiver further comprises:

the first monitoring module is used for cutting off the voltage input of the first power supply chip to the first main chip and the first Flash chip when the abnormal work of the first main chip is monitored;

the first monitoring module is in signal connection with the first main chip, the first monitoring module is electrically connected with the first power chip, and the first monitoring module is directly or indirectly electrically connected with the first main chip and the first Flash chip respectively.

9. The PLC carrier surge protection based network transmission system of claim 8, wherein:

the first transmission module comprises a first mixed port, and the first mixed port is connected with the transmitter in a signal and power supply mode in a co-cable co-transmission mode;

and a first isolation circuit is connected between the first hybrid port and the first power supply module, and the first hybrid port is in signal connection with the first coupler through a third surge protection circuit.

10. The PLC carrier surge protection based network transmission system of claim 9, wherein:

the transmitter includes:

a second transmission module for providing a second hybrid port to form a power and signal connection with the first transmission module;

the signal compensation module is used for amplifying and restoring the OFDM signal received by the second mixing port;

the data reading module is used for demodulating the signal amplified and reduced by the signal compensation module into a TCP/IP signal;

the data output module is used for outputting the TCP/IP signal;

the second power supply module is used for accessing a direct-current power supply received by the second mixed port;

the second voltage conversion module is used for performing voltage reduction processing on the direct-current power supply accessed by the second power supply module and then distributing the direct-current power supply to the data interpretation module and the signal compensation module;

the second mixing port, the signal compensation module and the data interpretation module are sequentially in signal connection; the second voltage conversion module is directly or indirectly electrically connected to the data interpretation module and the signal compensation module; a second isolation circuit is connected between the second mixing port and the second power supply module;

a fourth surge protection circuit and a fifth surge protection circuit are connected between the second power supply module and the second voltage conversion module, a second common mode protection circuit is connected between the data reading module and the data output module, and a sixth surge protection circuit is connected between the second mixing port and the signal compensation module.

Images