KR20160095558A - Camera device and network system based on internet of things - Google Patents

Abstract

The present invention relates to a camera device and a network system based on Internet of things (IoT). According to the present invention, the camera device based on IoT comprises: a camera module to output an analog image signal captured in an image sensor; an image compressing module to convert the analog image signal outputted from the camera module into a digital image signal and compress the converted digital video signal by using a compression algorithm; an Ethernet module to convert the digital image signal compressed in the image compressing module into an Ethernet-based packet signal; a power over coax (PoC) modem module converting the Ethernet signal converted in the Ethernet module into a coaxial cable orthogonal frequency division multiplexing (OFDM) signal multiplexing the Ethernet signal converted in the Ethernet module into multiple orthogonal narrowband carrier waves, outputting the OFDM signal to an external device, and receiving a coaxial cable OFDM signal transmitted from the external device into an Ethernet signal to output the converted Ethernet signal to the Ethernet module; and a control module connected to the Ethernet module to enable the external device to control and monitor a sensor or a device. Thus, sensors or devices of a camera device can be controlled and monitored in a remote place based on Internet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an Internet-based camera device and a network system,

The present invention relates to an object-based Internet-based camera device and a network system, and more particularly, to a object-based Internet camera device and a network system that enable power supply through a coaxial cable while controlling various sensors.

Conventionally, analog cameras have been widely used, and video images taken by analog cameras have been transferred to the management apparatus through coaxial cables. However, in recent years, analog cameras have gradually been replaced by digital cameras in response to the demands of users who demand high image quality.

When replacing an analog camera with a digital camera, instead of just replacing the analog camera, you need to install a new cable suitable for digital transmission instead of the analogue coaxial cable that was already installed. In this case, upgrading is not easy due to the increase in new installation and construction costs.

On the other hand, Power Line Communication (PLC) is used to transmit and receive data. Power line communication refers to a communication system that transmits and receives data through a power line wired for power supply to a home or office. That is, the power line communication can be realized by modulating the data information into the high-frequency signal on the power line and transmitting the high-frequency signal by separating and receiving the high-frequency signal using the filter having the cutoff frequency of 50 Hz or 60 Hz.

A method of transmitting an analog signal and a digital signal using such power line communication is disclosed in Korean Patent Laid-Open Publication No. 2013-0042086. However, such a power line communication scheme is not suitable for a coaxial cable, and another cost increase is required for applying a power line communication scheme.

Patent Document 1: Korean Patent Publication No. 2013-0042086

In order to solve the above-described problems, it is an object of the present invention to provide a object-based Internet camera device and a network system which can provide power through a coaxial cable while controlling various sensors.

According to another aspect of the present invention, there is provided an object-based Internet camera device including a camera module for outputting an analog image signal picked up by an image sensor, An Ethernet module for converting the digital image signal compressed by the image compression module into an Ethernet-based packet signal, and an Ethernet module for converting the digital image signal compressed by the image compression module into an Ethernet- Converts the converted Ethernet signal into an OFDM signal for a coaxial cable for multiplexing with a plurality of orthogonal narrow band carriers, outputs the OFDM signal to an external device, converts an OFDM signal for a coaxial cable transmitted from the external device to an Ethernet signal, And a PoC (Power over Coax) modem module for outputting, It is connected to a sensor control module or device in the external device and provides a control module to enable monitoring.

The control module may support a plurality of communication protocols to enable communication with the sensor or the device according to an Ethernet signal provided by the external device.

The control module may comprise an RS-232 standard communication part, an RS-422 standard communication part, an RS-485 standard communication part and a non-standard communication part in a plurality of communication protocols.

The PoC modem module can linearly amplify the converted OFDM signal for the coaxial cable by controlling the gain of the OFDM signal.

The object Internet-based camera apparatus further includes a voltage conversion module for receiving a predetermined DC voltage and converting the DC voltage into necessary rated voltages, wherein the PoC modem module separates a predetermined DC voltage provided from the external device from OFDM for a coaxial cable To the voltage conversion module.

The object-based Internet camera network system according to another embodiment of the present invention includes the object-based Internet camera device according to the embodiment described above, and a PoC module for communicating with the PoC modem module of the object-based Internet camera device via a coaxial cable A network video storage device for storing an Ethernet signal provided by the PoC hub device, and a network storage device connected to the network storage device via a TCP / IP network, The object of the present invention can be achieved by providing a monitoring terminal device which monitors a device and also controls the sensor or the device.

Wherein the monitoring terminal device calls a function of a communication protocol specified through a protocol API when any one of a plurality of communication protocols is designated through a user interface of the operating system, Depending on the function of the protocol, voltage setting and line driver can be provided.

If the communication protocol of the designated control module is a non-standard communication protocol, the monitoring terminal device may allow the user to change the order and ID of the command and modify it according to the non-standard communication protocol.

With the above-described configuration, even if the present invention is replaced with a digital camera instead of an analog camera, the existing coaxial cable can be used as it is.

In addition, the present invention can remotely control and monitor sensors or devices of a camera device based on the Internet.

Further, since the output intensity of the analog signal of the OFDM for the coaxial cable can be adjusted, the length of the coaxial cable with the PoC hub device can be made different according to the installation section.

In addition, the present invention supports a different communication protocol for each sensor or device, thereby facilitating the editing of the user.

FIG. 1 is a schematic view of a object Internet-based camera network system according to an embodiment of the present invention.
Fig. 2 is a block diagram of the camera apparatus shown in Fig. 1. Fig.
FIG. 3 is a block diagram of the PoC modem module shown in FIG. 2. FIG.
FIG. 4 is a diagram showing the impedance automatic matching unit shown in FIG. 3 in more detail.
5 is a diagram showing an example of a universal control program applied to the present invention.
6 is a diagram illustrating a method for modifying a non-standard communication protocol.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of an object-based Internet camera device and a network system according to the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the technical scope of the present invention. Will be.

FIG. 1 is a schematic view of a object Internet-based camera network system according to an embodiment of the present invention.

1, the object-based Internet camera network system includes a camera device 110, a Power over Coax (PoC) hub device 120, a DC voltage generating device 130, a network video storage device 140, And a monitoring terminal device 150. The PoC hub device 120 and the network video storage device 140 are connected to the LAN 170 via the coaxial cable 160. The PoC hub device 120 and the network video storage device 140 are connected to the network storage device 140, (140) and the monitoring terminal device (150) are connected through the TCP / IP network (180).

The camera device 110 includes a camera module 210, an image compression module 220, an Ethernet module 230, and a PoC modem module 250, which will be described later. . The analog video signal received from the camera module 210 is converted into a digital video signal by the video compression module 220 and then compressed and converted into Ethernet data through the Ethernet module 230 and then transmitted to the PoC modem module 250 through the PoC modem module 250. [ And is transmitted to the hub device 120.

The PoC hub device 120 receives the Ethernet data transmitted from the camera device 110 using the PoC modem module provided in the camera device 110 and provides the received Ethernet data to the network video storage device 140.

The DC voltage generating device 130 receives a commercial power supply, generates a predetermined DC voltage, for example, a DC voltage of 48 V, and supplies the DC voltage to the PoC hub device 120. The PoC hub device 120 generates necessary internal voltages by using the supplied 48V DC voltage and can also supply the 48V DC voltage to the camera device 110. [ If no commercial power is supplied to the area where the PoC hub device 120 is installed, the DC voltage generating device 130 may not be provided.

The network video storage device 140 receives the Ethernet data transmitted from the PoC hub device 120 via the LAN 170 and stores the received data in the memory area.

The monitoring terminal device 150 is connected to the network storage device 140 through the TCP / IP network 180 to monitor the video and sensor signals of the camera device 110.

In FIG. 1, the camera device 110 is connected to the PoC hub device 120 in a point-to-point manner, but a plurality of camera devices 110 may be connected in an annular fashion.

Fig. 2 is a block diagram of the camera apparatus shown in Fig. 1. Fig.

2, the camera apparatus 110 includes a camera module 210, an image compression module 220, an Ethernet module 230, a power conversion module 240, a PoC modem module 250, (260), a device interface module (270), and a control module (280).

The camera module 210 outputs an analog video signal picked up from a CMOS (complementary metal oxide semiconductor) image sensor or the like. The image compression module 220 converts an analog image signal output from the camera module 210 into a digital image signal, and compresses the digital image signal using a compression algorithm.

The Ethernet module 230 converts the digital image signal compressed by the image compression module 220 into an Ethernet-based packet signal. To this end, the Ethernet module 230 internally incorporates an Ethernet-based MAC / PHY.

The power conversion module 240 may be supplied with a voltage of 48V to 56V supplied from the DC voltage generating device 140 shown in FIG. 1 to the PoC hub device 120 through the coaxial cable 160. The voltage conversion module 240 can convert the voltage of 48V to 56V supplied through the coaxial cable 160 to output 12V voltage, 3.3V voltage, and 1.26V voltage.

Meanwhile, the power conversion module 240 may include the configuration of the DC voltage generating device 130 shown in FIG. In this case, a voltage of 48 V to 56 V may be supplied to the PoC hub device 120 through the PoC modem module 250.

In the case of the power conversion module 240, if the length of the coaxial cable 160 is long, the voltage drop will be large. Therefore, it is desirable to design a predetermined direct voltage, for example, 48V to 56V.

The PoC modem module 250 converts the Ethernet data output from the Ethernet module 230 into an Orthogonal Frequency Division Multiplexing (OFDM) signal for a coaxial cable that multiplexes the Ethernet data with a plurality of orthogonal narrow band carriers, The power supplied from the power conversion module 240 may be synthesized and output to the coaxial cable 160 or the power input through the coaxial cable 160 may be separated and provided to the power conversion module 240.

The PoC modem module 250 can also support a PHY rate of up to 200 Mbps, which meets the Homeplug AV standard, and also supports Internet Group Management Protocol (IGMP) to support multicast sessions and QoS (Quality of Service) function.

The plurality of devices 260 may include, for example, motion sensor devices, optical sensor devices, LED devices, and other devices.

The device interface module 270 is a module for interfacing with a plurality of devices, and is an interface for controlling a plurality of devices and for communicating with a plurality of devices.

The control module 280 is used to control and monitor peripheral sensors and devices in addition to receiving images of the camera device 110 remotely. For example, when the installer of the camera device 110 is an RS- 422, RS-485 and other non-standard communication protocols. The control module 280 may include a processing unit and a serial interface unit for processing the Ethernet in series.

FIG. 3 is a block diagram of the PoC modem module shown in FIG. 2. FIG.

3, the PoC modem module 250 includes an OFDM modem unit 310, a signal converter unit 320, an impedance automatic matching unit 330, a linear power amplifier unit 340, a transmission filter unit 350 A reception filter unit 360, and a signal power combining / separating unit 370.

The OFDM modem unit 310 converts the Ethernet data output from the Ethernet module 230 into an Orthogonal Frequency Division Multiplexing (OFDM) signal for a coaxial cable that multiplexes the Ethernet data with a plurality of orthogonal narrow band carriers.

The OFDM modem unit 310 may further include a security button 312. This security button 312 is a button for security setting, and only a PoC hub device 120 having the same password as a password, for example, 1234567, can communicate an OFDM analog signal for a coaxial cable.

The signal converter unit 320 includes an A / D converter and a D / A converter to convert an OFDM signal for a coaxial cable into an OFDM analog signal for a coaxial cable or an OFDM analog signal for a coaxial cable to an OFDM signal for a coaxial cable.

The impedance automatic matching unit 330 functions to automatically match the impedance with the external coaxial cable 160.

The linear power amplifier 340 amplifies the OFDM analog signal for the coaxial cable output from the signal converter 320 and outputs the amplified OFDM analog signal to the transmission filter 350 or the OFDM analog signal for the coaxial cable provided by the reception filter 360 And outputs the amplified signal to the signal converter 320. Meanwhile, the linear power amplifier 340 can adjust the output intensity of the OFDM signal by controlling the gain.

The transmission filter unit 350 is a filter for transmitting the OFDM analog signal for the coaxial cable amplified by the linear power amplifier 340 to the signal power combining / separating unit 370 and for removing noise. The reception filter unit 360 is a filter for transmitting the OFDM analog signal for coaxial cable provided from the signal power combining / separating unit 370 to the linear power amplifier 340 and for removing noise.

The signal power combining / separating unit 370 combines the voltage of 48V to 56V provided to the voltage converting module 240 with the OFDM analog signal for the coaxial cable provided by the transmitting filter unit 350 and outputs it to the coaxial cable 160, The OFDM analog signal for coaxial cable inputted from the PoC hub device 120 and the 48V to 56V voltage provided from the PoC hub device 120 and supplies the 48V to 56V voltage provided from the PoC hub device 120 to the voltage conversion module 240 Can supply.

The signal power combining / separating unit 370 may include a matching transformer 372. The matching transformer 372 enables impedance matching with the external coaxial cable 160 and also transmits the OFDM signal provided through the transmission filter unit 350 to the coaxial connector 160 and the external coaxial cable 160, And the OFDM signal provided to the coaxial connector 160 through the reception filter unit 360. [

FIG. 4 is a diagram showing the impedance automatic matching unit shown in FIG. 3 in more detail.

4, the impedance automatic matching unit 330 includes a first impedance providing unit 410, a second impedance providing unit 420, and a switch 430. [

The transformer 332 electrically isolates the transmit filter 327 or the receive filter 328 from the external coaxial cable 160 and also enables basic impedance matching.

It is preferable that the first impedance providing unit 410 and the second impedance providing unit 420 are connected to the transformer 332 in parallel so as to prevent the signal from being cut off when the switch 430 is switched.

In FIG. 4, the inductor L41, the resistor R41, and the resistor R42 are shown in the first impedance provider 410 and the inductor L42, the resistor R43, and the resistor R44 are shown in the second impedance provider 420, The connection may vary depending on the impedance match.

The first impedance supplier 410 may be configured to decrease the total impedance when connected to the signal line through the switch 430 and the second impedance supplier 420 may be configured to reduce the total impedance through the switch 430, When connected, the overall impedance can be configured to increase.

In FIG. 4, for example, only two impedance providing units are illustrated, but a plurality of impedance providing units may be provided for impedance matching.

Fig. 5 is a diagram showing an example of a universal control program applied to the present invention, and Fig. 6 is a diagram showing a method for modifying a non-standard communication protocol.

As shown in FIG. 5, the universal control program is composed of four layers. The first layer 510 and the second layer 520 are provided in the control module of the camera device 110 and the third layer 530 and the fourth layer 540 are provided in the network video storage device 140 or monitoring And may be provided in the terminal apparatus 150.

The lowest layer first layer 510 is a hardware interface and provides a voltage setting and line driver suitable for a communication cable so that the communication protocol of the sensor device can operate smoothly. The second layer 520 is a part that supports various communication protocols and includes standard communication parts such as an RS-232 communication part 522, an RS-422 communication part 524 and an RS-485 communication part 526, It is the layer that supports part 528.

The third layer 530 is a protocol application program interface (API), and is a layer that calls each function of the communication protocol specified in the fourth layer. The uppermost fourth layer 540 is a user interface that allows the installer to specify RS-232, RS-422, and RS-485 to interface with the sensor device of the camera device 110 in the user interface.

On the other hand, if the communication with the sensor device of the camera device 110 is a non-standard communication protocol, the fourth layer 540 can edit the communication protocol from the standard protocol, that is, Can be modified to conform to a non-standard protocol.

The OFDM signal for a coaxial cable and the OFDM analog signal for a coaxial cable, which is an analog signal converted from a digital signal, are distinguished from each other. However, in another embodiment, an OFDM signal for a coaxial cable OFDM < / RTI > analog signals.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It should be interpreted that it is included in the scope of right.

110: camera device 120: PoC hub device
130: DC voltage generating device 140: Network video storage device
150: Monitoring terminal device 210: Camera module
220: image compressing module 230: Ethernet module
240: power conversion module 250: PoC modem module
260: plurality of devices 270: device interface module
280: Control module 310: OFDM modem section
320: Signal converter section 330: Impedance automatic matching section
340: linear power amplifier 350: transmission filter
360: receiving filter unit 370: signal power combining / separating unit

Claims (8)

A camera module for outputting an analog video signal picked up by the image sensor,
An image compression module for converting the analog image signal output from the camera module into a digital image signal and compressing the digital image signal using a compression algorithm,
An Ethernet module for converting the digital image signal compressed by the image compression module into an Ethernet-based packet signal;
Converts the Ethernet signal converted from the Ethernet module into an OFDM signal for a coaxial cable for multiplexing with a plurality of orthogonal narrow band carriers, outputs the OFDM signal to an external device, converts the OFDM signal for coaxial cable transmitted from the external device to an Ethernet signal A PoC (Power over Coax) modem module for outputting to the Ethernet module, and
And a control module connected to the Ethernet module to control and monitor the sensor or device in the external device. The method according to claim 1,
Wherein the control module supports a plurality of communication protocols to enable communication with the sensor or the device according to an Ethernet signal provided by the external device. 3. The method of claim 2,
Wherein the control module comprises an RS-232 standard communication part, an RS-422 standard communication part, an RS-485 standard communication part and a non-standard communication part in a plurality of communication protocols. The method according to claim 1,
Wherein the PoC modem module controls the gain of the OFDM signal for the converted coaxial cable to linearly amplify the OFDM signal. 5. The method of claim 4,
Further comprising a voltage conversion module for receiving a predetermined DC voltage and converting the DC voltage into necessary rated voltages,
Wherein the PoC modem module separates a predetermined DC voltage provided from the external device from OFDM for a coaxial cable and provides the DC voltage to the voltage conversion module. An object-based Internet-based camera device according to any one of claims 1 to 5,
A PoC hub device for communicating with the PoC modem module of the object Internet-based camera device through a coaxial cable;
A network video storage device for storing the Ethernet signal provided by the PoC hub device, and
And a monitoring terminal device connected to the network storage device via the TCP / IP network to monitor the video signal of the object-based Internet camera device, the sensor or the device, and to control the sensor or the device. Internet based camera network system. The method according to claim 6,
Wherein the monitoring terminal device calls a function of a communication protocol specified through a protocol API when any one of a plurality of communication protocols is specified through a user interface of the operating system,
Wherein the control module provides a voltage setting and line driver according to a function of a communication protocol called from the monitoring terminal device. 8. The method of claim 7,
Wherein if the communication protocol of the designated control module is a non-standard communication protocol, the monitoring terminal device allows the user to change the order and ID of the command and modify it according to the non-standard communication protocol.

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