Network monitoring system based on network cable multiplexing

Abstract

The utility model discloses a network monitoring system based on network cable multiplexing, which comprises a network camera, an Ethernet cable and a monitoring end, and is characterized in that the network camera comprises a camera module, a first main control chip and a first converter; the monitoring end comprises a second main control chip, a second converter and a display terminal; the Ethernet cable comprises a default cable group and a redundant cable group; the camera module is respectively connected with the first main control chip and the first converter; the second converter and the display terminal are respectively connected with the second main control chip; the first main control chip communicates with the second main control chip through a default line group; the first converter communicates with the second converter through the redundant line set. The first converter converts data output by the camera module into a differential signal and sends the differential signal to the second converter; when the first main control chip is damaged, the second main control chip processes data output by the second converter, so that the monitoring system continues to work normally, and important and monitoring information is prevented from being lost to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a network camera especially based on network line multiplexing network monitoring system. BACKGROUND

[0002] The network camera (IPC) market has been everywhere with the technical progress and the expansion of application scene, and is often used in video monitoring scene, but if the main control chip of IPC is damaged, even if other components are intact, the whole network camera will still be invalid, causing the monitoring blind area to be unable to use.

[0003] The conventional solution currently adopts multiple cameras to cover multiple angles to ensure that the damage of individual camera will not cause blind area. This scheme needs more cameras, and the cost is high, and at the same time, the angle of multiple cameras is required, which is not conducive to the placement in narrow space. UTILITARY MODEL

[0004] In view of the above-mentioned defects of the network camera, the utility model provides a network monitoring system based on network line multiplexing, which can ensure the normal work of the monitoring system when the camera main control chip is invalid.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model adopts the following technical scheme:

[0006] A network monitoring system based on network line multiplexing, comprising a network camera, an Ethernet cable and a monitoring end, the network camera comprising a camera module, a first main control chip and a first converter; the monitoring end comprising a second main control chip, a second converter and a display terminal; the Ethernet cable comprising a default line group and a redundant line group; the camera module is connected with the first main control chip and the first converter respectively; the second converter and the display terminal are connected with the second main control chip respectively; the first main control chip communicates with the second main control chip through the default line group; the first converter communicates with the second converter through the redundant line group; the first converter converts the image signal output by the camera module into a differential signal; the second converter converts the differential signal output by the first converter into an image signal.

[0007] According to one aspect of the utility model, the first main control chip and the second main control chip communicate through Ethernet protocol.

[0008] According to one aspect of the utility model, the first converter is DVP to LVDS chip, mipi to LVDS chip or differential signal processing circuit / device.

[0009] According to one aspect of the utility model, the second converter is LVDS to DVP chip, LVDS to mipi chip or differential signal processing circuit / device.

[0010] According to one aspect of the utility model, the network camera includes a first network port; a first master control chip and a first converter are connected to the first network port respectively.

[0011] According to one aspect of the utility model, the monitoring end includes a second network port; a second master control chip and a second converter are connected to the second network port respectively.

[0012] According to one aspect of the utility model, the first network port is connected to the second network port through an Ethernet cable.

[0013] According to one aspect of the utility model, the first network port and the second network port are RJ45 interfaces.

[0014] The utility model has the advantages of simple structure and low cost.

[0015] The first converter is added at the network camera, the second converter corresponding to the first converter is added at the monitoring end, redundant data lines in the hundred-megabyte network transmission line can be used to transmit the image information of the camera module in the form of differential signals, the original Ethernet line can be compatible, the application range is wide, the transmission is stable, the anti-interference capability is strong, when the first master control chip at the network camera side fails, the differential signals transmitted through the idle data lines during the hundred-megabyte network transmission through the network cable can still ensure the normal work of the monitoring system, and the video signals are not lost. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without paying creative labor for the ordinary skilled in the art.

[0017] Figure 1 It is a principle block diagram of the network monitoring system based on network line multiplexing.

[0018] Legend: 1, network camera; 11, camera module; 12, first master control chip; 13, first converter; 14, first network port; 2, Ethernet cable; 3, monitoring end; 31, second master control chip; 32, second converter; 33, display terminal; 34, second network port. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1 As shown, a network monitoring system based on network cable multiplexing includes a network camera 1, an Ethernet cable 2 and a monitoring terminal 3, wherein the network camera 1 includes a camera module 11, a first main control chip 12 and a first converter 13; the monitoring terminal 3 includes a second main control chip 31, a second converter 32 and a display terminal 33; the Ethernet cable 2 includes a default line group and a redundant line group; the camera module 11 is connected to the first main control chip 12 and the first converter 13 respectively; the second converter 32 and the display terminal 33 are connected to the second main control chip 31 respectively; the first main control chip 12 communicates with the second main control chip 31 through the default line group; the first converter 13 communicates with the second converter 32 through the redundant line group; the first converter 13 converts the image signal output by the camera module 11 into a differential signal; the second converter 32 converts the differential signal output by the first converter 13 into an image signal.

[0022] Among them, the first main control chip 12 and the second main control chip 31 communicate with each other via the Ethernet protocol; the first converter 13 communicates with the second converter 32 via differential signals via a redundant line group; a single network camera 1 usually only needs to use a bandwidth of less than 100M when performing data transmission, and a standard network cable has 8 data lines. When performing 100M network transmission, only 4 of the data lines, namely the default line group, are used. The remaining 4 data lines do not have effective data transmission, namely the redundant line group, so the redundant line group can be used to transmit video signals as a backup; and the differential transmission scheme is a method that is more suitable for long-distance transmission of image data and has strong anti-interference performance, so the first converter 13 transmits signals to the second converter 32 in the form of differential signals;

[0023] Compared with the conventional network camera 1 monitoring system, in the network monitoring system disclosed in the application, the camera module 11 sends the collected image signals to the first master chip 12 and the first converter 13 at the same time, the image signals are processed, encoded and packaged by the first master chip 12, and then transmitted to the monitoring end 3 through the default line group (usually 1 / 2 line pair, 3 / 6 line pair of standard network cable) of the Ethernet line 2 through the Ethernet protocol; the first converter 13 converts the image signals into image differential signals, and transmits them to the monitoring end 3 through the redundant line group (usually 4 / 5 line pair, 7 / 8 line pair of standard network cable); at the monitoring end 3, the second master chip 31 receives the image signals sent by the first master chip 12 through the Ethernet protocol, and outputs them to the display terminal 33 for display after protocol conversion and decoding;

[0024] Under normal circumstances, when the first master chip 12 is good, the second converter 32 of the monitoring end 3 synchronously receives the data sent by the first converter 13 and converted into a format that can be processed by the second master chip 31, but when the first master chip 12 outputs normal signals, the second master chip 31 does not need to process the data output by the second converter 32; when the first master chip 12 is damaged, the display terminal 33 cannot normally obtain the image signals from the Ethernet protocol, at this time the second master chip 31 processes the data output by the second converter 32, so that the monitoring system continues to work normally, and the loss of important monitoring information is minimized;

[0025] Because the output interface of most camera modules 11 is not differential signal, and the master chip usually does not have differential input interface, it is necessary to convert it into differential signal through the converter, and then convert the differential signal into single-ended signal at the monitoring end 3; the signal output of the common camera module 11 on the market usually adopts DVP interface or mipi interface; among them, DVP is the abbreviation of Digital Video Port, which is a commonly used output interface of image sensor; and mipi interface is the abbreviation of Mobile Industry Processor Interface, which is a commonly used video transmission standard interface; and the common differential signal interface is LVDS, which is Low Voltage Differential Signaling;

[0026] Therefore, in the embodiment, the first converter 13 is a DVP-to-LVDS chip, a DVP-to-RJ45 chip and a mipi-to-LVDS chip; correspondingly, the second converter 32 is an LVDS-to-DVP chip, an RJ45-to-DVP chip and an LVDS-to-mipi chip.

[0027] Compared with a conventional network monitoring system, two converter chips are mainly added on hardware. The differential signals between the converters can be transmitted by using the idle data lines of the network cable originally used for 100 Mbps network transmission, so that the monitoring system can still work normally when the main control chip at the camera fails. Compared with the scheme of arranging multiple cameras to ensure that the picture is not lost, the monitoring system has obvious cost advantage and is more suitable for narrow space and convenient arrangement.

[0028] Embodiment two

[0029] As shown in Figure 1 A network monitoring system based on network cable multiplexing includes a network camera 1, an Ethernet cable 2 and a monitoring end 3. The network camera 1 includes a camera module 11, a first main control chip 12 and a first converter 13. The monitoring end 3 includes a second main control chip 31, a second converter 32 and a display terminal 33. The Ethernet cable 2 includes a default line group and a redundant line group. The camera module 11 is connected with the first main control chip 12 and the first converter 13 respectively. The second converter 32 and the display terminal 33 are connected with the second main control chip 31 respectively. The first main control chip 12 communicates with the second main control chip 31 through the default line group. The first converter 13 communicates with the second converter 32 through the redundant line group. The first converter 13 converts the image signal output by the camera module 11 into a differential signal. The second converter 32 converts the differential signal output by the first converter 13 into an image signal.

[0030] The first main control chip 12 communicates with the second main control chip 31 through Ethernet protocol. The first converter 13 communicates with the second converter 32 through differential signals. When a single network camera 1 transmits data, it usually only needs to use bandwidth within 100 Mbps. The standard network cable has 8 data lines. When transmitting 100 Mbps network, only 4 data lines, i.e. the default line group, are used. The remaining 4 data lines, i.e. the redundant line group, have no effective data transmission. Therefore, the redundant line group can be used to transmit video signals as backup. The differential transmission scheme is a way suitable for long-distance transmission of image data, and has strong anti-interference performance. Therefore, the first converter 13 transmits signals to the second converter 32 in the form of differential signals.

[0031] Compared with the conventional network camera 1 monitoring system, in the network monitoring system described in the present application, the camera module 11 sends the collected image signal to the first main control chip 12 and the first converter 13 at the same time. The image signal is processed, encoded and packaged by the first main control chip 12 and then transmitted to the monitoring terminal 3 through the Ethernet protocol via the default line group of the Ethernet cable 2 (usually the 1 / 2 line pair and 3 / 6 line of the standard network cable); the first converter 13 converts the image signal into an image differential signal and transmits it to the monitoring terminal 3 through the redundant line group (usually the 4 / 5 line pair and 7 / 8 line pair of the standard network cable); at the monitoring terminal 3, the second main control chip 31 receives the image signal sent by the first main control chip 12 via the Ethernet protocol, performs protocol conversion and decoding on it, and then outputs it to the display terminal 33 for display;

[0032] Under normal circumstances, when the first main control chip 12 is in good condition, the second converter 32 of the monitoring terminal 3 synchronously receives the data sent by the first converter 13 and converts it into a data format that can be processed by the second main control chip 31. However, when the output signal of the first main control chip 12 is normal, the second main control chip 31 does not need to process the data output by the second converter 32. When the first main control chip 12 is damaged, the display terminal 33 will not be able to normally obtain the image signal from the Ethernet protocol. At this time, the second main control chip 31 will process the data output by the second converter 32, so that the monitoring system can continue to operate normally and minimize the loss of important monitoring information.

[0033] Because the output interface of most camera modules 11 is not a differential signal, and the main control chip usually does not have a differential input interface, it is necessary to convert it into a differential signal through a converter, and then convert the differential signal into a single-ended signal at the monitoring end 3. The signal output of the common camera modules 11 on the market usually adopts a DVP interface or a MIPI interface. Among them, DVP is the abbreviation of Digital Video Port and is a commonly used output interface of image sensors. The MIPI interface is the abbreviation of Mobile Industry Processor Interface and is a commonly used video transmission standard interface. Common differential signal interfaces include LVDS, which is Low Voltage Differential Signaling.

[0034] Therefore, in this embodiment, the first converter 13 is a DVP to LVDS chip, a DVP to RJ45 chip, or a mipi to LVDS chip; correspondingly, the second converter 32 is a LVDS to DVP chip, a RJ45 to DVP chip, or a LVDS to mipi chip.

[0035] Compared with a conventional network monitoring system, two converter chips are mainly added on hardware, differential signals between the converters can be transmitted by using idle data lines of the network line originally used for 100M network transmission, so that the monitoring system can still work normally when the main control chip at the camera fails, compared with the scheme of arranging multiple cameras to ensure that the picture is not lost, the monitoring system has obvious cost advantage, and is more suitable for narrow space and is convenient to arrange.

[0036] Further, the camera module 11 supporting output differential signals and the main control chip with differential input interface can be used, so that the first converter 13 and the second converter 32 can use simpler differential signal processing circuit / device (such as common mode circuit for suppressing common mode interference and guaranteeing signal integrity), without using conversion chips, so that the circuit structure can be further simplified.

[0037] In actual application, the network camera 1 includes a first network port 14; the first main control chip 12 and the first converter 13 are connected to the first network port 14 respectively; correspondingly, the monitoring end 3 includes a second network port 34; the second main control chip 31 and the second converter 32 are connected to the second network port 34 respectively; the first network port 14 is connected to the second network port 34 through the Ethernet line 2; the standard network line has 8 data lines, and the line sequence is 1 to 8; according to the data line use condition of the standard network line in the conventional 100M network transmission, the first main control chip 12 and the second main control chip 31 perform Ethernet communication through the 1 / 2 line pair and the 3 / 6 line of the standard network line, and the first converter 13 and the second converter 32 perform differential signal transmission through the 4 / 5 line pair and the 7 / 8 line pair of the standard network line.

[0038] The first network port 14 and the second network port 34 both adopt a standard RJ45 interface, which can improve the universality of the equipment, and only one standard network line needs to be connected during use, that is, the original line can be compatible.

[0039] The embodiment of the utility model has the following advantages:

[0040] The first converter is added at the network camera, the second converter corresponding to the first converter is added at the monitoring end, the image information output by the camera module can be transmitted in the form of differential signal by using the redundant data line in the 100M network transmission line, the original Ethernet line can be compatible, and the application range is wide; the transmission is stable, the anti-interference capability is strong, when the first main control chip at the network camera side fails, the differential signal transmitted by the idle data line during the 100M network transmission through the network line can still guarantee the normal work of the monitoring system, and the video signal is not lost; compared with the scheme of arranging multiple cameras to ensure that the picture is not lost, the monitoring system has obvious cost advantage, is more suitable for narrow space, is flexible to use, and is convenient to arrange.

[0041] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A network monitoring system based on network cable multiplexing, comprising a network camera, an Ethernet cable and a monitoring terminal, characterized in that: The network camera includes a camera module, a first main control chip and a first converter; the monitoring terminal includes a second main control chip, a second converter and a display terminal; the Ethernet cable includes a default line group and a redundant line group; the camera module is connected to the first main control chip and the first converter respectively; the second converter and the display terminal are connected to the second main control chip respectively; the first main chip communicates with the second main chip via the default line group; The first converter communicates with the second converter through a redundant line group; the first converter converts the image signal output by the camera module into a differential signal; the second converter converts the differential signal output by the first converter into an image signal.

2. The network monitoring system based on network cable multiplexing according to claim 1, characterized in that: The first main control chip and the second main control chip communicate with each other via the Ethernet protocol.

3. The network monitoring system based on network cable multiplexing according to claim 2, characterized in that: The first converter is a DVP to LVDS chip, a mipi to LVDS chip or a differential signal processing circuit / device.

4. The network monitoring system based on network cable multiplexing according to claim 3, characterized in that: The second converter is an LVDS to DVP chip, an LVDS to MIPI chip or a differential signal processing circuit / device.

5. The network monitoring system based on network cable multiplexing according to claim 1, characterized in that: The network camera includes a first network port; a first main control chip and a first converter are respectively connected to the first network port.

6. The network monitoring system based on network cable multiplexing according to claim 5, characterized in that: The monitoring end includes a second network port; the second main control chip and the second converter are respectively connected to the second network port.

7. The network monitoring system based on network cable multiplexing according to claim 6, characterized in that: The first network port is connected to the second network port via an Ethernet cable.

8. The network monitoring system based on network cable multiplexing according to claim 6, characterized in that: The first network port and the second network port are RJ45 interfaces.

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