CN219204614U

CN219204614U - Network extender

Info

Publication number: CN219204614U
Application number: CN202223584419.5U
Authority: CN
Inventors: 苏斐; 李华娟; 李素锋
Original assignee: Shenzhen Yunzheng Electronics Co ltd
Current assignee: Shenzhen Yunzheng Electronics Co ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-06-16
Anticipated expiration: 2032-12-31

Abstract

The utility model provides a network extender, which comprises a receiver and a transmitter, wherein the receiver is connected with PSE equipment and comprises a receiving end network switching circuit for receiving and transmitting network signals, a POE input control circuit for receiving current signals of the PSE equipment and a POE coupling circuit for coupling the network signals and the current signals; the transmitter is connected with the PD equipment and comprises a transmitting end network switching circuit, a POE power receiving circuit for receiving coupling signals sent by the POE coupling circuit and a POE decoupling circuit for decoupling network signals and current signals. The network extender can detect the load running state in real time, automatically adjust the output power and automatically make rate adjustment according to the distance of the communication line. In addition, network transformers are respectively arranged between the transmitter and the receiver, between the transmitter and the PD equipment and between the receiver and the PSE equipment, so that the chip end can be isolated from the outside, and the anti-interference capability and the lightning protection capability are improved.

Description

Network extender

Technical Field

The utility model relates to the technical field of network wiring products, in particular to a network extender.

Background

Network extender products are often used in network cabling that effectively increase network transmission distances. The network extender with the POE function not only can realize the remote transmission of network signals, but also can meet the power supply requirement of PD equipment. Network extenders with POE functionality are typically used in pairs, consisting of a transmitter and a receiver. The receiver is connected with PSE equipment (such as a switch with POE function), the transmitter is connected with PD equipment (such as a network camera), and the transmitter and the receiver can be directly connected through a network cable, a twisted pair, a coaxial cable and the like.

However, the current network extender cannot adjust the output power in real time according to the operation state of the PD device, resulting in idle load waste. In addition, the current network extender cannot adjust the communication rate, and generally, different types are adopted to respectively correspond to the 10M or 100M rate, so that inconvenience is caused to wiring construction.

Disclosure of Invention

Aiming at the defects of the background technology, the utility model provides a network extender which can detect the running state of a load in real time, automatically adjust the output power and automatically adjust the speed according to the distance of a communication line.

The utility model provides a network extender, which comprises a receiver and a transmitter, wherein the receiver is connected with PSE equipment, and comprises the following components:

a receiving end network switching circuit for receiving and transmitting network signals,

POE input control circuit for receiving PSE device current signal,

POE coupling circuitry for coupling the network signal and the current signal;

a transmitter coupled to a PD device, the transmitter comprising:

a transmitting end network switching circuit for receiving and transmitting network signals,

POE receiving circuit for receiving coupling signal sent by POE coupling circuit,

POE decoupling circuitry for decoupling the network signal and the current signal;

and the POE coupling circuit is connected with the POE power receiving circuit through a coaxial cable.

Preferably, the receiver is further provided with a POE output control circuit at the receiving end; the POE output control circuit of the receiving end is used for detecting the running state of the transmitter and sending a power supply request to PSE equipment.

Preferably, the transmitter is also provided with a transmitting end POE output control circuit; the transmitting end POE output control circuit is used for detecting the running state of the PD equipment and controlling the power supply output of the transmitter.

Preferably, the receiver is further provided with a receiving end voltage reducing circuit;

the receiving end voltage reducing circuit is used for reducing voltage and supplying power to a chip in the receiver.

Preferably, the transmitter is further provided with a transmitting end voltage reducing circuit;

the transmitting end voltage reducing circuit is used for reducing voltage and supplying power to a chip in the transmitter.

Preferably, the receiving end network switching circuit comprises a digital-to-analog conversion circuit, the transmitting end network switching circuit comprises an analog-to-digital conversion circuit, and the control chips of the digital-to-analog conversion circuit and the analog-to-digital conversion circuit are STC 8S1K08S2.

Preferably, the POE coupling circuit is isolated from the coaxial cable by a network transformer T3, and the POE decoupling circuit is isolated from the coaxial cable by a network transformer T5.

Preferably, the POE input control circuit is provided with a rectifier bridge BR1.

Preferably, the receiving end POE output control circuit and the transmitting end POE output control circuit adopt DL2180 as PSE control chips.

The network extender of the utility model can detect the load running state in real time, automatically adjust the output power and automatically adjust the speed according to the distance of the communication line. In addition, network transformers are respectively arranged between the transmitter and the receiver, between the transmitter and the PD equipment and between the receiver and the PSE equipment of the network extender, so that the chip end can be isolated from the outside, and the anti-interference capability and the lightning protection capability are improved.

Drawings

The utility model is described in detail below with reference to examples and figures, wherein:

fig. 1 is a schematic circuit diagram of a network extender of the present utility model.

Fig. 2 is a circuit schematic of a receiver-side network switching circuit.

Fig. 3 is a schematic circuit diagram of a POE input control circuit.

Fig. 4 is a schematic circuit diagram of the POE output control circuit at the receiving end.

Fig. 5 is a schematic circuit diagram of POE coupling circuit.

Fig. 6 is a circuit schematic of the receiver-side step-down circuit.

Fig. 7 is a circuit schematic of a transmitting-side network switching circuit.

Fig. 8 is a schematic circuit diagram of the POE power receiving circuit.

Fig. 9 is a schematic circuit diagram of the transmitting-end POE output control circuit.

Fig. 10 is a schematic circuit diagram of POE decoupling circuit.

Fig. 11 is a circuit schematic of the transmitting-side step-down circuit.

Reference numerals:

100-receiver, 200-transmitter, 300-PSE device, 400-PD device, 101-receiving end network switching circuit, 102-POE input control circuit, 103-POE coupling circuit, 104-receiving end POE output control circuit, 105-receiving end step-down circuit, 201-transmitting end network switching circuit, 202-POE receiving circuit, 203-POE decoupling circuit, 204-transmitting end POE output control circuit, 205-transmitting end step-down circuit.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Thus, reference throughout this specification to one feature will be used in order to describe one embodiment of the utility model, not to imply that each embodiment of the utility model must be in the proper motion. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.

The principles of the present utility model are described in detail below with reference to the drawings and examples.

As shown in fig. 1-11, the present utility model proposes a network extender comprising a receiver 100 and a transmitter 200, the receiver 100 being connected to a PSE device 300, the receiver 100 comprising:

a receiving-end network switching circuit 101 for receiving and transmitting network signals,

POE input control circuit 102 for receiving a current signal from PSE device 300,

POE coupling circuit 103 for coupling a network signal and a current signal;

the transmitter 200 is connected with the PD device 400, the transmitter 200 comprising:

a transmitting end network switching circuit 201 for receiving and transmitting network signals,

A POE receiving circuit 202 for receiving the coupling signal transmitted from the POE coupling circuit 103,

POE decoupling circuitry 203 for decoupling the network signal and the current signal;

the POE coupling circuit 103 and the POE power receiving circuit 202 are connected by a coaxial cable.

In this embodiment, the PSE device is a network switch with POE function, and the PD device 400 is a network camera with POE function.

In this embodiment, the receiver 100 is further provided with a receiving end POE output control circuit 104; the POE output control circuit 104 is configured to detect an operation state of the transmitter 200 and send a power supply request to the PSE device 300. When a power supply request is sent, the PSE device outputs working current to the receiver, otherwise, the working current of the terminal is output.

In this embodiment, the transmitter 200 is further provided with a transmitting end POE output control circuit 204; the transmitting end POE output control circuit 204 is configured to detect an operation state of the PD device 400 and control a power supply output of the transmitter 200. When the PD device 400 to which the transmitter 200 is connected operates normally, the transmitter 200 outputs an operation current; the transmitter may cease outputting when the port is not connected to the PD device 400 or the PD device is disconnected from the transmitter.

In addition, the POE output control circuit 104 counts the transmission loss of the transmitter 200 and the coaxial cable.

In this embodiment, the receiver 100 is further provided with a receiver-side step-down circuit 105. The power supply voltage of the PSE device 300 is 48V, and the receiving-end step-down circuit 105 reduces the 48V voltage to 3.3V for chip step-down power supply in the receiver 100.

In this embodiment, the transmitter 200 is further provided with a transmitting-end step-down circuit 205; the power supply requirement of the PD end camera is 48V, and the transmitting end voltage reducing circuit 205 reduces the 48V voltage to 3.3V to reduce the voltage of the chip in the transmitter 200 for power supply.

In this embodiment, the transmitter 200 and the receiver 100 are connected by a coaxial cable, and an analog signal is transmitted between the two. The receiving-end network switching circuit 101 comprises a digital-to-analog conversion circuit, the transmitting-end network switching circuit 201 comprises an analog-to-digital conversion circuit, a control chip of the digital-to-analog conversion circuit and the analog-to-digital conversion circuit is STC 8S1K08S2, a special program is written to achieve the self-adaptive conversion effect, the distance of a communication line is automatically negotiated after the power is on, and then the speed is automatically adjusted by 10M or 100M.

In this embodiment, the POE coupling circuit 103 is isolated from the coaxial cable connection terminal BNC1 by the network transformer T3, and the POE decoupling circuit 203 is isolated from the coaxial cable connection terminal BNC2 by the network transformer T5. The network transformer of the embodiment has a lightning protection effect of 1.5KV and is safer to use.

In this embodiment, the POE input control circuit 102 is provided with a rectifier bridge BR1. And a rectifier diode is arranged in the rectifier bridge BR1, so that the network extender supports forward and reverse power supply, the network cable power supply supports 1236 and 4578 wiring modes, and the PD power receiving control chip has better compatibility.

In this embodiment, the receiving end POE output control circuit 104 and the transmitting end POE output control circuit 204 use DL2180 as a PSE control chip.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A network extender comprising a receiver and a transmitter, wherein the receiver is coupled to a PSE device, the receiver comprising:

POE input control circuit for receiving PSE device current signal,

POE coupling circuitry for coupling the network signal and the current signal;

the transmitter is connected with the PD equipment, and the transmitter includes:

A POE receiving circuit for receiving the coupling signal sent by the POE coupling circuit,

and the POE coupling circuit and the POE power receiving circuit are connected through a coaxial cable.

2. The network extender of claim 1, wherein the receiver is further provided with a receiver POE output control circuit; the POE output control circuit of the receiving end is used for detecting the running state of the transmitter and sending a power supply request to PSE equipment.

3. The network extender of claim 2, wherein the transmitter is further provided with a transmitting end POE output control circuit; and the POE output control circuit of the transmitting end is used for detecting the running state of the PD equipment and controlling the power supply output of the transmitter.

4. The network extender of claim 3, wherein the receiver is further provided with a receiver-side buck circuit;

5. The network extender of claim 4, wherein the transmitter is further provided with a transmitting-side step-down circuit;

6. The network extender of claim 5, wherein the receiver-side network switch circuit includes a digital-to-analog conversion circuit and the transmitter-side network switch circuit includes an analog-to-digital conversion circuit, the digital-to-analog conversion circuit and a control chip of the analog-to-digital conversion circuit being STC 8S1K08S2.

7. The network extender of claim 6, wherein the POE coupling circuitry is isolated from the coaxial cable by a network transformer T3 and the POE decoupling circuitry is isolated from the coaxial cable by a network transformer T5.

8. The network extender of claim 7, wherein the POE input control circuit has a rectifier bridge BR1.

9. The network extender of claim 8, wherein the receive POE output control circuit and the transmit POE output control circuit employ DL2180 as a PSE control chip.