CN214474537U - Network equipment and network communication system - Google Patents
Network equipment and network communication system Download PDFInfo
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- CN214474537U CN214474537U CN202120493088.0U CN202120493088U CN214474537U CN 214474537 U CN214474537 U CN 214474537U CN 202120493088 U CN202120493088 U CN 202120493088U CN 214474537 U CN214474537 U CN 214474537U
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Abstract
An embodiment of the present application provides a network device and a network communication system, including: a network device applied in an embedded system, the network device comprising: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface, so that a principle circuit can be simplified in the network mode switching process, and the board distribution space is saved.
Description
Technical Field
The embodiment of the application relates to the field of communication, in particular to a network device and a network communication system.
Background
In the related art, the existing embedded network application mode is diversified, in the process of converting the embedded network into the ethernet and needing the wireless module, the existing conversion mode needs the external wireless transceiver module of the platform, which is harsh on the requirements of size and weight and higher in integration level, the wireless module connected independently occupies a certain space, and the wireless transceiver module and the controller need to be connected through wires for information transmission, if the wireless module is far away from the controller, a longer cable is needed, which further aggravates the situation of insufficient space resources and increases signal interference.
Therefore, how to simplify the network switching circuit and save the board layout space becomes an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a network device and a network communication system, and at least a principle circuit can be simplified through some embodiments of the application, so that the board distribution space is saved.
In a first aspect, an embodiment of the present application provides a network device, which is applied in an embedded system, where the network device includes: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; and the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface.
Therefore, according to the embodiment of the application, the wireless signal transceiver is directly connected with the single chip microcomputer, the connection serial port arranged on the original network equipment is saved, and the process of level conversion can be omitted. Because some embodiments of this application communicate the wireless signal transceiver directly with the singlechip through transistor-transistor logic (TTL) level, realize the switching transmission of ethernet and wireless transceiver (for example wifi) signal to the circuit of network equipment is simplified in the realization, the space of laying out the board is saved, has saved the transmission link of serial ports signal level simultaneously, has reduced the interference among the whole signal transmission process.
With reference to the first aspect, in an implementation manner, the network device further includes: a first gating unit and a second gating unit; the wired signal transceiver can be connected with the singlechip through the first gating unit; the first voltage transformation circuit can be connected with the wired signal transceiver through the second gating unit; the wireless signal transceiver can be connected with the single chip microcomputer through the first gating unit.
Therefore, the embodiment of the application can connect the wired signal transceiver and the wireless signal transceiver with the single chip microcomputer in a time-sharing manner by using the gating unit, so that two network modes of a wired network and a wireless network are integrated on one network device, thereby realizing the two network modes by one network device, simplifying the principle circuit of the original network device and saving the board arrangement space.
With reference to the first aspect, in an implementation manner, the network device further includes: the third gating unit is respectively connected with the first voltage transformation circuit and the wireless signal transceiver; the second voltage transformation circuit is respectively connected with the wired signal transceiver and the wireless signal transceiver; the wired signal transceiver comprises a first transceiving interface and a second transceiving interface, and is connected with the second voltage transformation circuit through the first transceiving interface and the second gating unit through a bus.
In the embodiment of the application, the second voltage transformation circuit is used for replacing two voltage transformation circuits on the original network equipment, so that the principle circuit of the integrated circuit can be simplified on the premise of ensuring the functions; by combining the third network mode with the circuit in the above embodiment and using the gating switch for switching, the three network modes can be realized in a switching manner in one network device, thereby saving board arrangement space.
With reference to the first aspect, in one implementation manner, the second voltage transformation circuit includes: a first isolation capacitor; a first pull-up resistor, a first end of the first pull-up resistor and a first end of the first isolation capacitor being connected to a point L, the point L receiving a signal of a signal input positive terminal; a first end of the second pull-up resistor and a second end of the first pull-up resistor are connected to a point N, and the point N receives a first voltage input by a voltage input end; a first end of the second isolation capacitor and a second end of the second pull-up resistor are connected to a point P, and the point P receives a signal of a signal input negative end; a second end of the third pull-up resistor and a second end of the second isolation capacitor are connected to a point G, and the point G outputs a signal of a negative end; a second end of the fourth pull-up resistor and a first end of the third pull-up resistor are connected to a point Q, and the point Q outputs a second voltage output by a voltage output end; the first end of the fourth pull-up resistor and the second end of the first isolation capacitor are connected to a point M, and the point M outputs a signal of a positive electrode end.
Therefore, the embodiment of the application realizes voltage conversion between the wired signal transceiver and the wireless signal transceiver by using the pull-up resistor, and can also isolate direct-current interference signals while ensuring that alternating-current signals normally pass by using the isolation capacitor, thereby improving the overall performance of the network equipment circuit.
With reference to the first aspect, in an implementation manner, the single chip microcomputer is connected to the wireless signal transceiver through a TTL level.
Therefore, the embodiment of the application is connected with the wireless signal transceiver through the TTL level through the single chip microcomputer, so that the transmission link of the serial port signal level can be omitted, and the interference in the whole signal transmission process is reduced.
With reference to the first aspect, in one implementation manner, the first gating unit, the second gating unit, and the third gating unit are dial switches or relays.
Therefore, the embodiment of the application can control the gating unit to switch the network mode through two modes of manual gating and automatic gating, and the flexibility of switching the network mode according to actual requirements is improved.
In a second aspect, an embodiment of the present application provides a system for network communication, where the system includes: a network device, the network device comprising: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface; the user terminal is used for sending an instruction to the satellite ground station; and the satellite ground station is used for receiving and executing the instruction.
Drawings
Fig. 1 is a system diagram illustrating a network communication according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a prior art implementation of a circuit connection for converting an embedded network into an Ethernet network;
fig. 3 is a diagram illustrating an embedded network to ethernet structure according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a circuit connection relationship of another prior art implementation of an embedded network to an Ethernet network;
fig. 5 is a diagram illustrating another structure of converting an embedded network into an ethernet according to an embodiment of the present application;
FIG. 6 is a schematic diagram illustrating a circuit connection relationship between an embedded network and an Ethernet network according to a prior art implementation;
fig. 7 is a diagram illustrating a structure of another embedded network-to-ethernet structure according to an embodiment of the present application;
fig. 8 is an internal structural view of a second voltage transformation circuit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The method steps in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The embodiment of the application can be applied to various embedded system scenes needing to send network signals. For example, these scenarios include the process of information interaction between the satellite ground station and the user terminal, and the satellite ground station needs to receive and execute the instruction sent by the user terminal. For example, the user terminal sends an instruction (e.g., rotation) to the satellite earth station using a network signal sent by the network device, and the satellite earth station receives and executes the instruction.
The following is an example of information interaction between a satellite ground station and a user terminal, and illustrates the problems of the network device of the related art arrangement. Specifically, in the process of information interaction between a satellite ground station and a user terminal, an embedded network signal needs to be converted into an ethernet signal, a wireless module needs to be installed in the existing conversion mode, for some devices with higher integration level, the size and the weight are harsher, an independent wireless module occupies a certain space, the wireless module and a controller need to be in wired connection for information transmission, if the wireless module is far away from the controller, a long cable is needed, insufficient space resources are aggravated, and signal interference is increased.
At least to solve the above problem, some embodiments of the present application provide a network device, which is applied in an embedded system, and the network device includes: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface, so that a principle circuit can be simplified in the network mode switching process, and the board distribution space is saved. It is to be understood that the application scenarios of the embodiments of the present application are not limited thereto.
A system for network communication and a network device will be described in detail below with reference to fig. 1.
The network communication system of fig. 1 includes: a network device, the network device comprising: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface; the user terminal is used for sending an instruction to the satellite ground station; and the satellite ground station is used for receiving and executing the instruction.
In one embodiment, as shown in fig. 1, a network communication system 100 includes: the satellite earth station comprises network equipment 200, a satellite earth station 110 and a user terminal 120, wherein the network equipment 200 is embedded in the equipment of the satellite earth station 110, and when the satellite earth station works, the user terminal transmits a rotation instruction through network communication with the network equipment in order to control the satellite earth station to rotate, so that the satellite earth station rotates according to the rotation instruction, and the user terminal can select to be in wired connection or wireless connection with the network equipment.
It should be noted that the user terminal may be a notebook computer, a mobile phone, a tablet computer, or the like. As an embodiment, in the case that the user terminal is a notebook computer, the notebook computer may select to perform wired connection or wireless connection with the network device, and the notebook computer may perform wired connection through the network transformer and send a rotation instruction to the satellite ground station; the notebook computer can also send a rotation instruction to the satellite ground station through a wireless network.
As another embodiment, when the user terminal is a mobile phone, the mobile phone and the network device send a rotation command to the satellite ground station through the wireless network.
The following respectively describes technical solutions for implementing embedded network to ethernet in the related art and structures of network devices for implementing embedded network to ethernet provided by the present application, so as to embody differences between the present application and existing network devices.
In order to implement the embedded network to ethernet, as shown in fig. 2, in the prior art, the single chip microcomputer 210 needs to be connected to the wireless signal transceiver 220 through an RS232 serial port 232 and an external cable, and needs to convert a TTL level into an RS232 serial port level through a level conversion chip, when the wireless signal transceiver receives a signal, the RS232 level needs to be converted into the TTL level through level conversion, a network transformer 231 performs voltage transformation output, and the wireless module chassis 301 needs to be externally connected to the single chip microcomputer, which causes space waste, causes signal transmission to be interfered and wastes electrical equipment resources.
In view of the above problem, as shown in fig. 3, a network device 200 applied to an embedded system of the present application includes: a single chip microcomputer 210, a wireless signal transceiver 220 and a first voltage transformation circuit 230.
The single chip microcomputer 210 includes an output port a. The wireless signal transceiver 220 includes a first interface b and a second interface c, wherein the first interface b is connected to the output port a of the single chip microcomputer 210 by a bus. The first transformer 230 is connected to the wireless signal transceiver 220 through the second interface c.
In one embodiment of the application, the single chip microcomputer and the wireless signal transceiver are connected through transistor-transistor logic (TTL) level.
The embodiment of the application integrates a wireless signal transceiver, a single chip microcomputer and a first voltage transformation circuit into a network device, omits the level conversion process, directly connects the single chip microcomputer with the wireless signal transceiver, directly communicates through TTL level, and saves two MAX3232 chips and external cables.
It should be noted that, the single chip microcomputer appropriately reduces the frequency and specification of a Central Processing Unit (CPU), and integrates peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D conversion, a UART, a PLC, a DMA, and even an LCD driving circuit on a single chip to form a chip-level computer; the network device shown in fig. 3 is a connection mode between components in the second network mode.
Therefore, the wireless signal transceiver is directly connected with the single chip microcomputer and integrated on the same chip, the original serial port connection mode is saved, the level conversion process can be omitted, the wireless signal transceiver directly communicates with the single chip microcomputer through TTL, transmission of Ethernet and wireless signals is achieved, the principle circuit is simplified, the board distribution space is saved, meanwhile, the transmission link of the serial port signal level is omitted, and interference in the whole signal transmission process is reduced.
Another embedded network to ethernet implementation is exemplarily set forth below.
As shown in fig. 4, in the prior art, the embedded system works in the wired connection device 300, the single chip microcomputer 210 needs to be connected to the wired signal transceiver 310, the wired signal transceiver completes conversion of a network electrical interface protocol to realize network signal transceiving, and the interface is connected to the network transformer 231 to perform signal level coupling and output a network signal. However, the wired connection mode makes the way of outputting network signals single, and cannot be flexibly changed.
In view of the above problem, as shown in fig. 5, the network device 200 applied in the embedded system of the present application further includes, in an embodiment: a first gating unit 321 and a second gating unit 322; the wired signal transceiver 310 can establish connection with the single chip microcomputer 210 through the first gating unit 321; the first voltage transformation circuit 230, which can establish a connection with the wired signal transceiver 310 through the second gating unit 322; the wireless signal transceiver 220 can be connected to the single chip microcomputer through the first gating unit.
In the embodiment of the present application, based on the network device shown in fig. 3, a first gating unit and a second gating unit are added, and the wired signal transceivers in the wired connection mode are integrated together in the same network device, in other words, one network device can change the connection lines on the network device through the gating units, thereby implementing the interconversion between the two network modes.
In one embodiment, the first gating unit, the second gating unit and the third gating unit are dial switches or relays; the dial switch is used for manual gating; the relay is used for automatic gating.
The network device shown in fig. 5 is a connection method between the components in the first network mode.
As a specific embodiment, when the network device is switched from the second network mode to the first network mode, the first gating unit dials the dial switch from the wireless signal transceiver to be connected with the wired signal transceiver, and the second gating unit likewise dials the dial switch from the wireless signal transceiver to be connected with the wired signal transceiver, so as to form the network device as shown in fig. 5, where in the first network mode, the wireless signal transceiver has no connection relationship with other components on the network device, and when the system only needs to operate in the first network mode, the wireless signal transceiver can be removed.
As another specific embodiment, when the network device is switched from the first network mode to the second network mode, the first gating unit dials the dial switch from the wired signal transceiver to be connected with the wireless signal transceiver, and the second gating unit dials the dial switch from the wired signal transceiver to be connected with the wireless signal transceiver, so as to form the network device shown in fig. 3.
Therefore, in the embodiment of the application, the wired signal transceiver is connected with the single chip microcomputer by using the gating unit, two network modes can be concentrated on one network device, different electric appliance lines are switched in a gating mode through the gating unit, and one network device can be switched into the two network modes, so that a principle circuit can be simplified, and the board arrangement space can be saved.
The following illustrates yet another embodiment of an embedded network to ethernet network.
In the prior art, as shown in fig. 6, the wired signal transceiver 310 and the wireless signal transceiver 220 are connected through two network transformer 231(HR911105A) interfaces to realize network signal transmission, wherein the network transformer mainly functions to perform impedance matching, filter out common mode interference, and enhance signals, so as to transmit longer distance, but the two network transformers result in too many components, affect signal transmission, and waste cable consumables due to connection.
In view of the above problems, the present invention integrates the wireless signal transceiver into the network device, so that there are no problems of impedance mismatch and long-distance transmission, and the network signal cannot be directly connected because the bias voltage between the wired signal transceiver and the wireless signal transceiver is not consistent.
As shown in fig. 7, in an implementation manner of the embodiment of the present application, the network device 200 further includes: the third gating unit is respectively connected with the first voltage transformation circuit and the wireless signal transceiver; a second transformer circuit 410 connected to the wired signal transceiver 310 and the wireless signal transceiver 220, respectively; the wired signal transceiver 310 includes a first transceiving interface f and a second transceiving interface e, and is connected to the second voltage transformation circuit 410 through a bus via the first transceiving interface f and the second gating unit 322.
The network device shown in fig. 7 is a connection method between the components in the third network mode.
In the embodiment of the present application, based on the network device shown in fig. 5, a second voltage transformation circuit 410 and a third gating unit 323 are added, and the network mode conversion is performed through the first gating unit, the second gating unit, and the third gating unit, in other words, one network device may change a connection line on the network device through the gating unit, thereby implementing the mutual conversion of the three network modes.
As a specific embodiment, when the network device is switched from the third network mode to the first network mode, the connection between the single chip microcomputer and the wired signal transceiver through the first gating unit is kept unchanged, the second gating unit is disconnected from the second voltage transformation circuit and connected with the first voltage transformation circuit, and the third gating unit is disconnected from the wireless signal transceiver.
As another specific embodiment, when the network device is switched from the third network mode to the second network mode, the first gating unit is disconnected from the wired signal transceiver and connected to the wireless signal transceiver, and the second gating unit is disconnected from the second voltage transformation circuit.
Therefore, the embodiment of the application uses the second voltage transformation circuit to replace the original two voltage transformation circuits, so that the principle circuit of the integrated circuit can be simplified on the premise of ensuring the functions; by combining the third network mode with the circuit in the above embodiment and switching by using the gating switch, the network device can switch the three network modes, thereby saving board layout space.
As shown in fig. 8, in an embodiment, the second voltage transformation circuit 410 includes: a first pull-up resistor 511, wherein a first end g of the first pull-up resistor 511 and a first end t of the first isolation capacitor 521 are connected to a point L, and the point L receives a signal input from the positive terminal 531; a second pull-up resistor 512, wherein a first terminal i of the second pull-up resistor 512 and a second terminal h of the first pull-up resistor 511 are connected to a point N, and the point N receives a first voltage input by a voltage input terminal 532; a second isolation capacitor 522, a first end s of the second isolation capacitor 522 and a second end j of the second pull-up resistor 512 are connected to a point P, and the point P receives a signal input from the negative electrode terminal 533; a third pull-up resistor 514, a second terminal q of the third pull-up resistor and a second terminal of the second isolation capacitor 522 are connected to a point G, and the point G outputs a signal of the negative terminal 536; a fourth pull-up resistor 513, wherein a second end m of the fourth pull-up resistor 513 and a first end n of the third pull-up resistor 514 are connected to a Q point, and the Q point outputs the second voltage output by the voltage output terminal 535; a first terminal l of the fourth pull-up resistor 513 and a second terminal u of the first isolation capacitor 521 are connected to a point M, and the point M outputs a signal of the positive terminal 534.
In one embodiment, signals may be output from the signal input positive terminal 531 and the signal input negative terminal 533, and input from the signal output positive terminal 534 and the output signal output negative terminal 536.
As a specific example, the wired signal transceiver DM9000EP is driven by voltage type, and the bias voltages of the wired signal transceiver and the wireless signal transceiver are not the same (the communication voltage of the wired signal transceiver is 3.3V, and the communication voltage of the wireless signal transceiver is 1.8V), so the signals cannot be directly connected. Because the network signal is a high-frequency alternating current signal, the middle of the network signal can be isolated by an isolation capacitor, so that the current of the alternating current signal can be ensured to normally pass, the conversion between 3.3V and 1.8V is realized through an external pull-up resistor, and the effect of isolating a direct current interference signal can be achieved. Considering the requirements of the driving capability and impedance matching of the wired signal transceiver and the wireless signal transceiver, a first isolation capacitor of 0.1uF is arranged between the signal input positive terminal and the signal output positive terminal, and a second isolation capacitor of 0.1uF is arranged between the signal input negative terminal and the signal output negative terminal; a first pull-up resistor of 49.9 Ω is placed between the positive terminal of the signal input and the voltage input terminal, a second pull-up resistor of 49.9 Ω is placed between the voltage input terminal and the negative terminal of the signal input, a third pull-up resistor of 33 Ω is placed between the negative terminal of the signal output and the voltage output terminal, and a fourth pull-up resistor of 33 Ω is placed between the voltage output terminal and the positive terminal of the signal output.
Therefore, the embodiment of the application realizes voltage conversion between the wired signal transceiver and the wireless signal transceiver by using the pull-up resistor, can ensure that an alternating current signal normally passes through by using the isolation capacitor, and can isolate a direct current interference signal.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A network device applied in an embedded system, the network device comprising:
the singlechip comprises an output port;
the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode;
and the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface.
2. The network device of claim 1, further comprising:
a first gating unit and a second gating unit;
the wired signal transceiver can be connected with the singlechip through the first gating unit;
the first voltage transformation circuit can be connected with the wired signal transceiver through the second gating unit;
the wireless signal transceiver can be connected with the single chip microcomputer through the first gating unit.
3. The network device of claim 2, further comprising:
the third gating unit is respectively connected with the first voltage transformation circuit and the wireless signal transceiver;
the second voltage transformation circuit is respectively connected with the wired signal transceiver and the wireless signal transceiver;
the wired signal transceiver comprises a first transceiving interface and a second transceiving interface, and is connected with the second voltage transformation circuit through the first transceiving interface and the second gating unit through a bus.
4. The network device of claim 3, wherein the second transformer circuit comprises:
a first isolation capacitor;
a first pull-up resistor, a first end of the first pull-up resistor and a first end of the first isolation capacitor being connected to a point L, the point L receiving a signal of a signal input positive terminal;
a first end of the second pull-up resistor and a second end of the first pull-up resistor are connected to a point N, and the point N receives a first voltage input by a voltage input end;
a first end of the second isolation capacitor and a second end of the second pull-up resistor are connected to a point P, and the point P receives a signal of a signal input negative end;
a second end of the third pull-up resistor and a second end of the second isolation capacitor are connected to a point G, and the point G outputs a signal of a negative end;
a second end of the fourth pull-up resistor and a first end of the third pull-up resistor are connected to a point Q, and the point Q outputs a second voltage output by a voltage output end;
the first end of the fourth pull-up resistor and the second end of the first isolation capacitor are connected to a point M, and the point M outputs a signal of a positive electrode end.
5. The network device of claim 1, wherein the single-chip microcomputer is connected to the wireless signal transceiver via a TTL level.
6. The network device of claim 2, wherein the first, second, and third gating units are dip switches or relays.
7. A system for network communication, the system comprising:
a network device, the network device comprising: the singlechip comprises an output port; the wireless signal transceiver comprises a first interface and a second interface, and the first interface is in wired connection with the output port of the singlechip in a bus mode; the first voltage transformation circuit is connected with the wireless signal transceiver through the second interface;
the user terminal is used for sending an instruction to the satellite ground station;
and the satellite ground station is used for receiving and executing the instruction.
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| CN202120493088.0U CN214474537U (en) | 2021-03-08 | 2021-03-08 | Network equipment and network communication system |
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| CN202120493088.0U CN214474537U (en) | 2021-03-08 | 2021-03-08 | Network equipment and network communication system |
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