KR200326671Y1 - Network camera - Google Patents

Abstract

The present invention relates to a network camera system, and more specifically, some pins of a signal connector for signal transmission and reception provided in a camera are connected to the communication chip, and the other pins receive an external power source through the UTP cable to receive an internal camera. It relates to a network camera connected to the power module for supplying power to the reverse current prevention means. In the existing network camera system, when the PoE (Power over Ethernet) module is not used, the cable installation is complicated because the UTP (Unshield Twisted Pair) cable and the power cable must be connected to the signal connector and the power connector of the camera, respectively. In addition, even in the case of the existing network camera using the PoE module, the two-input one-output PoE input module and the one-input two-output PoE module are provided unless the signal connector inside the camera is a PoE compatible model designed to receive signals / power simultaneously. Since the output module should be provided to transmit and receive signals and power, the installation of cables and PoE modules is complicated. The present invention utilizes one 2-input 1-output PoE module to facilitate signal transmission and power supply to a network camera. To this end, the output signal / power connector of the PoE module is connected to the signal / power connector of the network camera through a UTP cable. Some pins of the signal connector inside the network camera are connected to a circuit of the network camera system as a signal terminal, and the other pins are connected to a power supply terminal to have a current backflow prevention function to split signals and power. Connector.

Description

Network camera {

The present invention relates to a network camera system, and more specifically, some pins of a signal connector for signal transmission and reception provided in a camera are connected to the communication chip, and the other pins receive an external power source through the UTP cable to receive an internal camera. It relates to a network camera connected to the power module for supplying power to the reverse current prevention means. In particular, the present invention provides a network camera having PoE compatibility so that both a signal and a power can be supplied using only one power over Ethernet module.

As shown in FIG. 1, when the existing network camera system does not use a PoE (Power over Ethernet) module, the hub / router 10 connected to the Internet network 11 may use an Unshield Twisted Pair (UTP) cable 12. Connected to the signal connector 110 inside the camera 100 to transmit and receive signals, and connect the power plug 25 of the power adapter 20 which is an AC / DC converter to an AC power source (not shown), The power supply is connected to the power connector 120 inside the camera 100 via a cable 22 to supply power to the network camera.

In the camera 100 of FIG. 1, the signal connector 110 is an RJ-45 connector, and generally includes an 8-pin terminal, which is connected to a hub / router 10 and an 8-strand UTP cable 12. Among them, four strands are connected to four pins of the signal connector 110 and wired 112 to the internal PCB company on the communication chip 140, and the remaining four strands are four pins of the signal connector 110 as spare cables. Is disconnected 114. Meanwhile, the power connector 120 inside the camera 100 of FIG. 1 is connected to the power adapter 20 with a power cable 22, and communicates with the power chip 132 via the power bus 132 through the power chip 130. ) Are supplied to the CPU 150 and the signal processing circuit 160, respectively. The power supplied to the camera 100 is supplied to the communication chip 140, the CPU 150, and the signal processing circuit 160 so that the image captured by the imaging unit (not shown) of the network camera 100 may be transferred to the CPU (not shown). The signal processing circuit 160 is processed under the control of 150 to transmit the image sent from the network camera 100 to the user remotely via the Internet network 11 via the communication chip 140 and the hub / router 10. . Signal transmission / reception processes on the network of the hub / router 10 and the network camera 100 are clear to those skilled in the art and thus will not be described in detail herein.

As shown in FIG. 1, when the PoE module is not used, since the signal cable 12 and the power cable 22 must be connected to the network camera 100 which is a network device, the installation cost of the cable is high and after installation. Maintenance also has the disadvantage of being complicated.

In order to solve the drawbacks of each cable when the signal cable and power cable to the network equipment are separately installed, a power supply device via Ethernet, a so-called Power Over Ethernet (PoE), is used. It will be briefly explained.

Ethernet is a standard for LAN (Local Area Network) using coaxial cable jointly developed by Xerox, Intel and DEC. Most of the LAN is built over Ethernet, so you can share files with a file server, and even share printers and modems. 10BASE standard is used for transmission cable with LAN connection method. Transmission speed is about 10Mbps, and CSMA / CD (Carrier) that sends data after confirming that node does not send all signals by monitoring the signal of transmission line. Sense Multiple Access with Collision Detection) access method. The CSMA / CD method provides a communication function to enable data transmission between a user device and a computer located in a short distance. The most widely used method of LAN connection is that all nodes monitor the cable during their transmission time. If a node detects a collision by sending a signal from another node during data transmission, it detects it and retransmits it immediately.

Power over Ethernet (PoE), also called "Active Ethernet", is designed to eliminate the need to provide separate power to network equipment used in wireless APs and other wired LANs. The PoE module allows users to send data and power simultaneously via one CAT5 Ethernet cable, one of the twisted-pair cable standards by the criteria that define the category of UTP cable (based on the EIA / TIA568 Commercial Building Wiring). This not only provides great flexibility in the placement of wireless APs and network equipment, but also significantly reduces installation costs in most cases.

The PoE module starts with a CAT5 injector that puts DC power into the CAT5 cable, which is usually installed near an Ethernet switch or hub. Some wireless APs and network devices accept DC power directly from their CAT5 cable through their RJ-45 connectors. These devices are often referred to as "PoE compatible" or "Active Ethernet compatible" devices.

If the device is not PoE compatible, it can be converted to PoE through a method called "DC picker" or "tap." These are sometimes called "splitters" for Active Ethernet. These devices isolate the DC power from the CAT5 cable and supply it to the network equipment through the standard DC power connector.

In general, a network camera is not a "PoE compatible" or "Active Ethernet compatible" device that can directly accept DC power through an RJ-45 connector. As shown in FIG. A 1-output PoE input module (injector) 200 and a 1-input 2-output PoE output module (splitter) 300 were provided to perform signal transmission and power supply to the network camera 100. The same reference numerals are used for the same parts as the components of FIG. 1, and the descriptions of the same functions of the same components of FIGS. 2 and 1 will be omitted, and the following description will be mainly focused on the injector 200 and the splitter 300. Shall be.

As shown in FIG. 2, two PoE modules are used to simultaneously transmit signals and power to the network camera 100 having no "PoE compatibility". Here, the PoE module is used in the vicinity of the hub / router. In the vicinity of the network camera 100, a splitter 300 PoE module is used. The injector 200 is a 2-input 1-output module, and the signal connector 210 inside is connected to the hub / router 10 by the UTP cable 12 to transmit and receive signals, and the power connector 220 is a power cable ( 22) is connected to the power adapter 20 to supply power. The 8-pin signal connector 210 of the RJ-45 connector transmits and receives only 4 pins, and the 4 pins are disconnected. The two pins of the power connector 220 supply DC power of (+) and (-), respectively. The 4 pins of these signal connectors 210 are connected to 4 pins of the 8 pins of the output side signal / power connector 230 which is the RJ-45 connector of the output terminal of the injector 200, and the 2 pins of the power connector 220 are the output side. The other 4 pins of the 8 pins of the signal / power connector 230 are connected. In the power supply connection, two pins of the power connector 220 are commonly connected to each of the two pins of the output signal / power connector 230.

The output side signal / power connector 230 of the injector 200 is connected to the splitter 300 via eight UTP cables 252. The splitter 300 is a 1-input 2-output PoE module, and the internal input side signal / power connector 310 is an 8-pin RJ-45 connector and 4 pins are connected to 4 strands of the UTP cable 252 to receive a signal. The pin is connected to the other four strands of the UTP cable 252 to receive power. Therefore, the signal and power are split again in the input signal / power connector 310 so that the four-strand signal line 312 is connected to four of the eight pins of the output-side signal connector 330, and the four-power line 314 is connected. ) Is connected to the output power connector 320 'by two lines. The output signal connector 330 is connected to the signal connector 110 of the network camera 100 through the UTP cable 352, the output power connector 320 'is connected to the network camera 100 through the power cable 362 Is connected to the power supply connector 120).

Thus, even when the PoE module is used to supply signals and power to the network camera 100 which is the network equipment at the same time, when the network camera is not a "PoE compatible" network equipment, that is, a single signal and power If the signal and power cannot be separated immediately by being supplied through the RJ-45 connector, the injector 200 and the splitter 300 are used to supply the signal and power. It has the disadvantage of being complicated.

The object of the present invention is to provide a network camera having a power supply stage that is compatible with PoE.

1 is a configuration diagram illustrating a network camera system that does not use a conventional Power over Ethernet (PoE) module.

2 is a configuration diagram illustrating a network camera system using two existing PoE modules.

3 is a configuration diagram illustrating a network camera system using one PoE module according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 ... hub / router, 11 ... Internet

12, 52 ... UTP cable, 20 ... Power adapter

22 ... power cable, 25 ... plug

100 '... Network camera, 110, 210, 230 ... RJ-45 connector

112, 114 ', 122, 132 ... camera inner line, 120, 220 ... power connector

130 ... power module, 140 ... communication chip

150 ... CPU, 160 ... Signal Processing Circuit

200 ... Injector, 212, 214, 222 ... PoE module internal line

The present invention, in order to achieve the above technical problem, according to one aspect of the present invention is driven by a power supplied from the outside to process the signal photographed by the camera UTP connected to the signal connector provided in the camera under the operation of the communication chip In a network camera that transmits to the outside via a cable, some pins of the signal connector for signal transmission and reception provided in the camera are connected to the communication chip, the other pins receive external power through the UTP cable to the inside of the camera It provides a network camera, characterized in that connected to the power module for supplying power through a reverse current prevention means.

Preferably, the signal connector is an RJ-45 connector consisting of 8 pins so that the UTP cable is connected, 4 pins are connected to the communication chip for the signal, and the remaining 4 pins are common lines of 2 pins each for power inside the camera. It is characterized by being connected to the module.

Preferably, the reverse current preventing means is a diode installed in each line.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram illustrating a network camera system using one PoE module according to the present invention. In FIG. 3, a network camera is used as an example of network equipment which is not compatible with PoE. In FIG. 3, components having the same functions as those of FIGS. 1 and 2 are denoted by the same reference numerals, and a configuration of a camera that is PoE compatible will be described first with reference to FIG. 3.

In FIG. 3, the connector 110, which is an external interface of the camera 100 ′, is configured to be PoE compatible through a line connection 114 ′ with an internal power module 130, and is driven by power supplied from an external source. The network camera processes the signal photographed by the camera 100 ′ and transmits the signal to the outside through the UTP cable 52 connected to the signal connector 110 provided in the camera under the operation of the communication chip 140. The signal connector 110 for signal transmission and reception provided in the camera 100 'is an 8-pin RJ-45 connector, 4 of which is connected to the communication chip 140 for signal transmission, and the remaining 4 Pins are connected to the power module 130 in two lines by tying up two pins. Reverse current prevention means (V +, V-) are respectively installed in the connection line 114 'to the power module 130 to prevent the DC current supplied to the power module from flowing backward. The PoE compatible network camera 100 'splits the external power supplied to the signal connector 110 through the UTP cable 52 and supplies it to the power module 130, thereby providing a separate power connector 120. It can supply power inside the camera without going through it. As a result, the power connector may not be configured when the camera is manufactured. Even if a power connector is provided, a separate power cable does not need to be connected to the camera. When the network camera 100 'is supplied with the power module 130 through the power line 114', the power supplied through the UTP cable 52 is communicated with the communication chip 140 and the CPU by the power bus 132. 150, power is supplied to the signal processing circuit 160, respectively. The power supplied to the camera 100 is supplied to the communication chip 140, the CPU 150, and the signal processing circuit 160 so that the image captured by the imaging unit (not shown) of the network camera 100 may be transferred to the CPU (not shown). The signal is processed by the signal processing circuit 160 under the control of 150 and transmitted to the outside via the RJ-45 connector 110 under the operation of the communication chip 140.

As described above, the network camera 100 'that is PoE compatible uses a PoE module 200 to simultaneously supply signals and power, as shown in FIG. Can be supplied to the camera.

In FIG. 3, a single PoE module is used to simultaneously transmit signals and power to a network camera 100 having "PoE compatibility". Here, the injector PoE module 200 is used only in the vicinity of a hub / router and the network camera 100 ') Can be connected to the PoE module and the UTP cable (52). As described with reference to FIG. 2, the injector 200 of FIG. 3 is also a two-input one-output module, and the signal connector 210 therein is connected to the hub / router 10 by a UTP cable 12 and connected to a signal. And the power supply connector 220 is connected to the power adapter 20 by the power supply cable 22 to supply power. The 8-pin signal connector 210 of the RJ-45 connector transmits and receives only 4 pins, and the 4 pins are disconnected. The two pins of the power connector 220 supply DC power of (+) and (-), respectively. The 4 pins of these signal connectors 210 are connected to 4 pins of the 8 pins of the output side signal / power connector 230 which is the RJ-45 connector of the output terminal of the injector 200, and the 2 pins of the power connector 220 are the output side. The other 4 pins of the 8 pins of the signal / power connector 230 are connected. In the power connection, each of the two pins of the power connector 220 is commonly connected to the two pins of the output signal / power connector 230.

In this way, signals and power can be simultaneously supplied to the network cameras with PoE compatibility through the PoE module, thereby simplifying cable installation and maintenance.

Meanwhile, the present invention uses a PoE module as shown in FIG. 3 instead of using two PoE modules as described with reference to FIG. 2 to a network camera that is not PoE compatible. It adopts power supply method to supply power by design change.

As shown in FIG. 3, the network camera 100 ′ is driven by a power supplied from the outside to process a signal photographed by the camera, thereby providing a signal connector 110 provided in the camera under the operation of the communication chip 140 ( 8-pin RJ-45 connector is commonly used) to transmit to the outside via a UTP cable (52) connected. In this case, in the case of a network camera 100 'having no PoE compatibility, a separate power connector 120 is provided in the camera to receive power through a separate power cable (not shown) to supply power to the power module 130. Can be supplied. However, in this case, since the cable installation and maintenance is complicated as described with reference to FIG. 2, the unused pin of the signal connector 110 inside the camera is connected to the power module 130 inside the camera as in the present invention. The power was also supplied through the UTP cable 52 connected to the signal connector 110. At this time, the signal connector 110 is an RJ-45 connector consisting of 8 pins so that the UTP cable is connected, 4 pins are connected to the communication chip 140 for the signal, and the remaining 4 pins are common lines by 2 pins. It is connected to the power module 130 inside the camera through the reverse current prevention means (V +, V-). Preferably, the reverse current preventing means is a diode installed in each line. As a result, a separate power cable does not need to be connected to the network camera 100 'having PoE compatibility to supply power.

Next, prepare a power over Ethernet (PoE) module 200 and connect the signal cable 12 from the network element that enables internet communication to the signal connector 210 of the PoE module near the hub / router 10. And a power cable 22 to the power connector 220 of the PoE module, and the signal connector 210 and the power connector 220 to the output connector 230 of the PoE module. Both signals and power are supplied through the 230.

Next, one end of the UTP cable 52 capable of simultaneously transmitting and receiving signals and power to the output connector 230 of the PoE module is provided, and the other end of the UTP cable 52 is provided in the camera 100 '. To the connector 110 for signaling.

The present invention proposes to supply power without using a separate power connector by changing the power supply terminal of a network camera that is not PoE compatible. As shown in FIG. 3, the apparatus for supplying power to the network camera of the present invention is driven by a power supplied from the outside to process a signal photographed by the camera 100 ′ to operate the camera under the operation of the communication chip 140. 100 ') using a single PoE module 200 and a UTP cable 52 to supply power to the network camera to the outside through the UTP cable 52 connected to the signal connector 110 provided in the 100'. To this end, the present invention includes a power connection line 114 ′ connecting an unused pin of the signal connector 110 inside the camera to the power module 130. Preferably, diodes V + and V- are installed on the power connection line 114 'to prevent reverse flow of current. In addition, a signal connector 210 to which a signal cable from a network element enabling internet communication is connected, a power connector 220 to which a power cable is connected, and connected to the signal connector 210 and the power connector 220. Power over Ethernet (PoE) module 200 having an output side connector 230 for supplying a signal and power, and an output side connector 230 of the power over Ethernet module 200 and the camera 100 '. UTP cable 52 is connected between the signal connector 110 so as to supply a signal and power at the same time.

As described above, by slightly modifying the power supply terminal of the network camera having no PoE compatibility, it is possible to supply both the signal and the power to the network camera using only one PoE module.

As described above, the network camera configured to have the present invention uses only one PoE module that uses a part of the UTP cable for signal transmission and the other part for power supply, without having to connect both a signal cable and a power cable to the network camera. It can be used by connecting directly to a network camera, thereby reducing the installation and maintenance costs.

Claims (3)

In the network camera which is driven by the power supplied from the outside to process the signal taken by the camera and transmitted to the outside through the UTP cable connected to the signal connector provided in the camera under the operation of the communication chip, Some pins of the signal connector for signal transmission and reception included in the camera are connected to the communication chip, and the other pins provide reverse current prevention means to a power module that receives external power through the UTP cable and supplies power to the camera. Network camera, characterized in that connected via. According to claim 1, The signal connector is an RJ-45 connector consisting of an 8-pin to connect the UTP cable, 4 pins are connected to the communication chip for the signal, the remaining 4 pins are a common line by 2 pins the camera Network camera, characterized in that connected to the internal power module. The network camera according to claim 1, wherein the reverse current preventing means is a diode installed in each line.