CN210112027U - Network communication system - Google Patents
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- CN210112027U CN210112027U CN201921497551.8U CN201921497551U CN210112027U CN 210112027 U CN210112027 U CN 210112027U CN 201921497551 U CN201921497551 U CN 201921497551U CN 210112027 U CN210112027 U CN 210112027U
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Abstract
The utility model discloses a network communication system, which comprises a first gateway device, a network interface chip, a second gateway device, a switch, an electronic switch, a switch control circuit, a single chip microcomputer and a power module, wherein the first gateway device is connected with the network interface chip, the network interface chip is connected with the second gateway device, and the second gateway device is connected with the switch; the power module comprises a voltage input end, a transformer, a rectifier bridge, a first capacitor, a first resistor, a first triode, a first diode, a third diode, a second triode, a second resistor, a second capacitor, an inductor, a third resistor, a fourth resistor, a third capacitor, an operational amplifier, a second diode, a fourth capacitor and a voltage output end, wherein one end of a primary coil of the transformer is connected with one end of the voltage input end. Implement the utility model discloses a network communication system has following beneficial effect: the safety and the reliability of the circuit are higher.
Description
Technical Field
The utility model relates to a network communication field, in particular to network communication system.
Background
The remote data transmission has the advantages of high transmission speed, convenience in operation and the like, and is widely applied to various industries. In order to transmit data collected from various places to a certain server, remote data transmission is generally implemented by using a network communication system. At present, a network communication system comprises a plurality of gateway devices, and when a certain gateway device is powered off or crashed, remote transmission of data cannot be realized, so that inconvenience is brought to users. After a certain gateway device in some existing network communication systems is powered off or crashed, the microprocessor sends a control signal to the electronic switch through the switch control circuit, so that communication connection can still be achieved between the gateway devices, and user experience can be better met. However, the power supply part of the conventional network communication system lacks a corresponding circuit protection function, such as: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the present invention is to provide a network communication system with high circuit security and reliability, which is directed to the above-mentioned defects of the prior art.
The utility model provides a technical scheme that its technical problem adopted is: constructing a network communication system, which comprises a first gateway device, a network interface chip, a second gateway device, a switch, an electronic switch, a switch control circuit, a single chip microcomputer and a power supply module, wherein the first gateway device is connected with the network interface chip, the network interface chip is connected with the second gateway device, the second gateway device is connected with the switch, the network interface chip is connected with the electronic switch, the electronic switch is connected with the switch control circuit, the switch control circuit is connected with the single chip microcomputer, the single chip microcomputer is connected with the power supply module, and the single chip microcomputer is also connected with the network interface chip;
the power supply module comprises a voltage input end, a transformer, a rectifier bridge, a first capacitor, a first resistor, a first triode, a first diode, a third diode, a second triode, a second resistor, a second capacitor, an inductor, a third resistor, a fourth resistor, a third capacitor, an operational amplifier, a second diode, a fourth capacitor and a voltage output end, wherein one end of a primary coil of the transformer is connected with one end of the voltage input end, the other end of the primary coil of the transformer is connected with the other end of the voltage input end, one end of a secondary coil of the transformer is connected with one input end of the rectifier bridge, the other input end of the rectifier bridge is connected with the other end of a secondary coil of the transformer, one output end of the rectifier bridge is respectively connected with the anode of the first capacitor, one end of the first resistor and the collector electrode of the first triode, the base electrode of the first triode is respectively connected with the other end of the first resistor, the cathode of the first diode and the base electrode of the second triode, the emitting electrode of the first triode is connected with the anode of the third diode, the cathode of the third diode is respectively connected with the emitting electrode of the second triode, one end of the second resistor, one end of the inductor, one end of the third resistor, one end of the fourth resistor and the inverting input end of the operational amplifier, and the collector electrode of the second triode is respectively connected with the other end of the second resistor and the anode of the second capacitor;
the non-inverting input end of the operational amplifier is connected with the other end of the inductor, the output end of the operational amplifier is respectively connected with the anode of the second diode, the other end of the fourth resistor and the anode of the third capacitor, the cathode of the second diode is respectively connected with the anode of the fourth capacitor and one end of the voltage output end, the other output end of the rectifier bridge is respectively connected with the cathode of the first capacitor, the anode of the first diode, the cathode of the second capacitor, the other end of the third resistor, the cathode of the third capacitor, the cathode of the fourth capacitor and the other end of the voltage output end, and the type of the third diode is L-1822.
In the network communication system, the power module further includes a fifth resistor, one end of the fifth resistor is connected to one end of the inductor, the other end of the fifth resistor is connected to one end of the third resistor, one end of the fourth resistor and the inverting input terminal of the operational amplifier, and the resistance of the fifth resistor is 26k Ω.
In the network communication system of the present invention, the operational amplifier is of the type LM 324.
In the network communication system of the present invention, the first transistor is an NPN transistor.
In the network communication system of the present invention, the second transistor is an NPN transistor.
In the network communication system of the present invention, the model of the network interface chip is KSZ8863 RLLI.
Implement the utility model discloses a network communication system has following beneficial effect: the intelligent gateway is provided with a first gateway device, a network interface chip, a second gateway device, a switch, an electronic switch, a switch control circuit, a single chip microcomputer and a power supply module; the power module comprises a voltage input end, a transformer, a rectifier bridge, a first capacitor, a first resistor, a first triode, a first diode, a third diode, a second triode, a second resistor, a second capacitor, an inductor, a third resistor, a fourth resistor, a third capacitor, an operational amplifier, a second diode, a fourth capacitor and a voltage output end, wherein the third diode is used for current-limiting protection, so that the safety and the reliability of the circuit are high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic configuration diagram of an embodiment of a network communication system according to the present invention;
fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the embodiment of the network communication system of the present invention, a schematic structural diagram of the network communication system is shown in fig. 1. In fig. 1, the network communication system includes a first gateway device 1, a network interface chip 2, a second gateway device 3, a switch 4, an electronic switch 5, a switch control circuit 6, a single chip microcomputer 7 and a power module 8, wherein the first gateway device 1 is connected to the network interface chip 2, the network interface chip 2 is connected to the second gateway device 3, the second gateway device 3 is connected to the switch 4, the network interface chip 2 is connected to the electronic switch 5, the electronic switch 5 is connected to the switch control circuit 6, the switch control circuit 6 is connected to the single chip microcomputer 7, the single chip microcomputer 7 is connected to the power module 8, and the single chip microcomputer 7 is further connected to the network interface chip 2.
The switch 4 is used for communication connection with the server. The model number of the network interface chip 2 is KSZ8863 RLLI. Direct communication is only possible between adjacent gateway devices, and this method also does not form a loop because the last gateway device does not connect to the first gateway device. This wiring method can be used to transmit power, digital signals and analog signals.
Fig. 2 is a schematic circuit diagram of a power module in this embodiment, in fig. 2, the power module 8 includes a voltage input terminal Vin, a transformer T, a rectifier bridge Z, a first capacitor C1, a first resistor R1, a first transistor Q1, a first diode D1, a third diode D3, a second transistor Q2, a second resistor R2, a second capacitor C2, an inductor L, a third resistor R3, a fourth resistor R4, a third capacitor C3, an operational amplifier a1, a second diode D2, a fourth capacitor C4, and a voltage output terminal Vo, wherein one end of a primary winding of the transformer T is connected to one end of the voltage input terminal Vin, the other end of the primary winding of the transformer T is connected to the other end of the voltage input terminal Vin, one end of a secondary winding of the transformer T is connected to one input terminal of the rectifier bridge Z, the other end of the rectifier bridge Z is connected to the other end of the secondary winding of the transformer T, an output end of the rectifier bridge Z is connected with an anode of a first capacitor C1, one end of a first resistor R1 and a collector of a first triode Q1, a base of the first triode Q1 is connected with the other end of the first resistor R1, a cathode of a first diode D1 and a base of a second triode Q2, an emitter of the first triode Q1 is connected with an anode of a third diode D3, a cathode of a third diode D3 is connected with an emitter of the second triode Q2, one end of a second resistor R2, one end of an inductor L, one end of a third resistor R3, one end of a fourth resistor R4 and an inverting input end of an operational amplifier a1, and a collector of the second triode Q2 is connected with the other end of the second resistor R2 and the anode of the second capacitor C2.
The non-inverting input end of the operational amplifier a1 is connected to the other end of the inductor L, the output end of the operational amplifier a1 is connected to the anode of the second diode D2, the other end of the fourth resistor R4 and the anode of the third capacitor C3, the cathode of the second diode D2 is connected to the anode of the fourth capacitor C4 and one end of the voltage output end Vo, and the other output end of the rectifier bridge Z is connected to the cathode of the first capacitor C1, the anode of the first diode D1, the cathode of the second capacitor C2, the other end of the third resistor R3, the cathode of the third capacitor C3, the cathode of the fourth capacitor C4 and the other end of the voltage output end Vo.
In this embodiment, the third diode D3 is a current limiting diode, and is used for current limiting protection of the emitter current of the first transistor Q1. The current limiting protection principle is as follows: when the emitter current of the first triode Q1 is large, the third diode D3 can reduce the emitter current of the first triode Q1 to keep the first triode Q1 in a normal working state, and the elements in the circuit are not burnt out due to too large current, so that the safety and reliability of the circuit are high. It should be noted that in the present embodiment, the model of the third diode D3 is L-1822. Of course, in practical applications, the third diode D3 may also be another type of diode with similar functions.
The working principle of the power module 8 is as follows: the transformer T can step down the mains supply, and then the stepped down power is processed through the rectifier bridge Z, so as to provide a suitable working voltage for the single chip microcomputer 7. When the output voltage fluctuates due to the change of the mains voltage or the current of the single chip microcomputer 7, the output voltage can be adjusted through an adjusting circuit consisting of the first triode Q1, the second triode Q2, the first resistor R1, the second resistor R2, the first diode D1 and the second capacitor C2, so that the stability of the output power supply can be ensured.
The operational amplifier a1, the inductor L, the fourth resistor R4, the third capacitor C3, and the second diode D2 can also form a filter circuit, which can perform filtering processing on the power module 8, thereby further ensuring the stability of the output of the power module 8. The power module 8 can also select electronic components with different parameters according to different required output voltages and currents.
In this embodiment, the model of the operational amplifier a1 is LM 324. The first transistor Q1 is an NPN transistor. The second transistor Q2 is an NPN transistor. Of course, in practical applications, the first transistor Q1 and the second transistor Q2 may also be PNP transistors, but the circuit structure is also changed accordingly.
In this embodiment, the power module 8 further includes a fifth resistor R5, one end of the fifth resistor R5 is connected to one end of the inductor L, and the other end of the fifth resistor R5 is connected to one end of the third resistor R3, one end of the fourth resistor R4, and the inverting input terminal of the operational amplifier a 1. The fifth resistor R5 is a current limiting resistor for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the fifth resistor R5 is located is large, the current of the branch where the fifth resistor R5 is located can be reduced by the fifth resistor R5, so that the branch can be kept in a normal operating state, and the components in the circuit cannot be burned out due to the large current, so that the safety and reliability of the circuit are further enhanced. It should be noted that, in the present embodiment, the resistance of the fifth resistor R5 is 26k Ω. Of course, in practical applications, the resistance of the fifth resistor R5 may be adjusted according to specific situations, that is, the resistance of the fifth resistor R5 may be increased or decreased according to specific situations.
In short, in the present embodiment, the current-limiting diode is provided in the power module 8, so that the safety and reliability of the circuit are high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A network communication system is characterized by comprising a first gateway device, a network interface chip, a second gateway device, a switch, an electronic switch, a switch control circuit, a single chip microcomputer and a power module, wherein the first gateway device is connected with the network interface chip, the network interface chip is connected with the second gateway device, the second gateway device is connected with the switch, the network interface chip is connected with the electronic switch, the electronic switch is connected with the switch control circuit, the switch control circuit is connected with the single chip microcomputer, the single chip microcomputer is connected with the power module, and the single chip microcomputer is also connected with the network interface chip;
the power supply module comprises a voltage input end, a transformer, a rectifier bridge, a first capacitor, a first resistor, a first triode, a first diode, a third diode, a second triode, a second resistor, a second capacitor, an inductor, a third resistor, a fourth resistor, a third capacitor, an operational amplifier, a second diode, a fourth capacitor and a voltage output end, wherein one end of a primary coil of the transformer is connected with one end of the voltage input end, the other end of the primary coil of the transformer is connected with the other end of the voltage input end, one end of a secondary coil of the transformer is connected with one input end of the rectifier bridge, the other input end of the rectifier bridge is connected with the other end of a secondary coil of the transformer, one output end of the rectifier bridge is respectively connected with the anode of the first capacitor, one end of the first resistor and the collector electrode of the first triode, the base electrode of the first triode is respectively connected with the other end of the first resistor, the cathode of the first diode and the base electrode of the second triode, the emitting electrode of the first triode is connected with the anode of the third diode, the cathode of the third diode is respectively connected with the emitting electrode of the second triode, one end of the second resistor, one end of the inductor, one end of the third resistor, one end of the fourth resistor and the inverting input end of the operational amplifier, and the collector electrode of the second triode is respectively connected with the other end of the second resistor and the anode of the second capacitor;
the non-inverting input end of the operational amplifier is connected with the other end of the inductor, the output end of the operational amplifier is respectively connected with the anode of the second diode, the other end of the fourth resistor and the anode of the third capacitor, the cathode of the second diode is respectively connected with the anode of the fourth capacitor and one end of the voltage output end, the other output end of the rectifier bridge is respectively connected with the cathode of the first capacitor, the anode of the first diode, the cathode of the second capacitor, the other end of the third resistor, the cathode of the third capacitor, the cathode of the fourth capacitor and the other end of the voltage output end, and the type of the third diode is L-1822.
2. The network communication system according to claim 1, wherein the power module further comprises a fifth resistor, one end of the fifth resistor is connected to one end of the inductor, the other end of the fifth resistor is respectively connected to one end of the third resistor, one end of the fourth resistor and the inverting input terminal of the operational amplifier, and the resistance of the fifth resistor is 26k Ω.
3. The network communication system according to claim 1 or 2, wherein the operational amplifier is of type LM 324.
4. The network communication system according to claim 1 or 2, wherein the first transistor is an NPN transistor.
5. The network communication system according to claim 1 or 2, wherein the second transistor is an NPN transistor.
6. The network communication system of claim 1 or 2, wherein the network interface chip has a model number of KSZ8863 RLLI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921497551.8U CN210112027U (en) | 2019-09-09 | 2019-09-09 | Network communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921497551.8U CN210112027U (en) | 2019-09-09 | 2019-09-09 | Network communication system |
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| CN210112027U true CN210112027U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521278A (en) * | 2020-05-12 | 2020-08-11 | 广东建安物联科技有限公司 | Novel heat source and fire intelligent detection system and method based on narrow-band Internet of things |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521278A (en) * | 2020-05-12 | 2020-08-11 | 广东建安物联科技有限公司 | Novel heat source and fire intelligent detection system and method based on narrow-band Internet of things |
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