CN207820113U - Wireless video monitoring equipment and system - Google Patents
Wireless video monitoring equipment and system Download PDFInfo
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- CN207820113U CN207820113U CN201820243951.5U CN201820243951U CN207820113U CN 207820113 U CN207820113 U CN 207820113U CN 201820243951 U CN201820243951 U CN 201820243951U CN 207820113 U CN207820113 U CN 207820113U
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Abstract
The utility model provides wireless video monitoring equipment and system, is related to the wireless communication technology field of outdoor study, including：Second audio/video information of the real-time collection site of video camera, the second audio/video information of video acquisition transmission terminal pair generates live audio/video information after handling, video acquisition transmission terminal also establishes data link with radio network unit, and live audio/video information is transmitted to by video management server using 3G/4G technologies, video management server is managed live audio/video information, generate the first audio/video information, and it is according to user right that the first audio/video information is concurrent to multiple client devices, and the dispatch command of client device is sent to video acquisition transmission terminal, video acquisition transmission terminal carries out remote control according to dispatch command and by PTZ agreements to video camera.The utility model improves remote monitoring, the flexible response ability of scheduling by providing the smooth wireless network stablized.
Description
Technical field
The utility model is related to the wireless communication technology fields of outdoor study, more particularly, to wireless video monitoring equipment
And system.
Background technology
For various outdoor large engineerings, field condition needs promptly to pass monitoring center back in real time.However, engineering
Point usually has uncertainty again, and network signal is unstable, and field condition and construction progress can not timely be transmitted to monitoring prison
Control center or other networking units, are not easy to quick remote supervisory, commander and scheduling.Or when accident occurs,
Help information can not be smoothly being sent out at the first time, cause event handling timely and effective.
Utility model content
In view of this, the purpose of this utility model is to provide wireless video monitoring equipment and system, it is smooth by providing
Stable wireless network and improve remote monitoring, the flexible response ability of scheduling.
In a first aspect, the utility model embodiment provides a kind of wireless video monitoring equipment, wherein including：It is set to
The wireless video collecting transmission unit and radio network unit at scene and the video management server for being set to monitoring center；
The wireless video collecting transmission unit establishes data link with the radio network unit, and uses 3G/4G skills
The live audio/video information of acquisition is transmitted to the video management server by art, and the video management server is to the scene
Audio/video information is managed, and generates the first audio/video information, and carried out to first audio/video information according to user right
Real-time release.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the wireless video collecting transmission unit includes：It is transmitted eventually by the connected video acquisition of RS485 interfaces or RS232 interface
End and video camera；
Second audio/video information of the real-time collection site of video camera, the video acquisition transmission terminal is to described second
Audio/video information is handled, and the live audio/video information is generated.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Two kinds of possible embodiments, wherein be provided with warning button on the video acquisition transmission terminal, pressed triggering the warning
In the case of button, the video management server carries out gang video recording.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein the video camera is pinhole camera, sucked type video camera or ball-shaped cloud platform camera shooting
Machine.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Four kinds of possible embodiments, wherein the video acquisition transmission terminal is waist-pack type equipment, Backpack type equipment or box sets
It is standby.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Five kinds of possible embodiments, wherein the video acquisition transmission terminal is using embedded real-time multi-task operating system and embedding
Enter formula processor.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Six kinds of possible embodiments, wherein the wireless video collecting transmission unit further includes reserve battery and charging equipment.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, further include GPS locator；
The GPS locator is connected with video acquisition transmission terminal, is positioned by wireless network.
Second aspect, the utility model embodiment also provide a kind of wireless video monitoring system, wherein including multiple clients
End equipment further includes any one of them wireless video monitoring equipment as above；
Video management server in the wireless video monitoring equipment is according to user right, simultaneously by the first audio/video information
It is sent to multiple client equipment, and the dispatch command of the client device is sent to by video acquisition using 3G/4G technologies
Transmission terminal；
The client device shows first audio/video information, and initiates the dispatch command；
The video acquisition transmission terminal is remotely controlled according to the dispatch command and by PTZ agreements to video camera
System.
In conjunction with second aspect, the utility model embodiment provides the first possible embodiment of second aspect,
In, the client device includes video wall, computer and notebook.
The utility model embodiment brings following advantageous effect：Wireless video monitoring equipment provided by the utility model and
System, including：It is set to live wireless video collecting transmission unit and radio network unit and is set to monitoring center
Video management server, wireless video collecting transmission unit include video acquisition transmission terminal and video camera；Video camera is adopted in real time
Collect second audio/video information at scene, the second audio/video information of video acquisition transmission terminal pair generates live sound and regards after handling
Frequency information, video acquisition transmission terminal also establishes data link with radio network unit, and is regarded live sound using 3G/4G technologies
Frequency information is transmitted to video management server, and video management server is managed live audio/video information, generates the first sound
Video information, and it is according to user right that the first audio/video information is concurrent to multiple client devices, and use 3G/4G technologies
The dispatch command of client device is sent to video acquisition transmission terminal, video acquisition transmission terminal is according to dispatch command and leads to
It crosses PTZ agreements and remote control is carried out to video camera.The utility model is improved long-range by providing the smooth wireless network stablized
The flexible response ability of monitoring, scheduling.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and is obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is the wireless video monitoring equipment schematic diagram that the utility model embodiment one provides；
Fig. 2 is the wireless video monitoring system schematic diagram that the utility model embodiment one provides；
Fig. 3 is the wireless video monitoring equipment schematic diagram that the utility model embodiment two provides.
Icon：
100- wireless video collecting transmission units；110- video cameras；111- ball-shaped cloud platform video cameras；120- video acquisitions pass
Defeated terminal；130- connecting rods；140- control panels；150-3G/4G connection sockets for antenna；200- radio network units；300- video tubes
Manage server；400- client devices.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
For various outdoor large engineerings, field condition needs promptly to pass monitoring center back in real time.However, engineering
Point usually has uncertainty again, and network signal is unstable, and field condition and construction progress can not timely be transmitted to monitoring prison
Control center or other networking units, are not easy to quick remote supervisory, commander and scheduling.Or when accident occurs,
Help information can not be smoothly being sent out at the first time, cause event handling timely and effective.
Based on this, the wireless video monitoring equipment and system that the utility model embodiment provides can be smooth by providing
Stable wireless network and improve remote monitoring, the flexible response ability of scheduling.
For ease of understanding the present embodiment, the wireless video monitoring disclosed in the utility model embodiment is set first
Standby and system describes in detail.
Embodiment one：
Fig. 1 is the wireless video monitoring equipment schematic diagram that the utility model embodiment one provides.
Radio video monitoring device and system based on video processing technique and 3G/4G radio mobile communication technologies are work
Journey special product, can be in mobile environment, and support wirelessly provides smoothness, high-definition transmission of video, can
The 3G/4G wireless network video solutions of high-performance, high availability, low cost are provided for construction site, love scene in real time,
It is the system for integrating video monitoring system, voice-transmission system and intervention schedule.
Referring to Fig.1, wireless video monitoring equipment includes：It is set to the wireless video collecting transmission unit 100 and nothing at scene
Line network element 200, and it is set to the video management server 300 of monitoring center；Wireless video collecting transmission unit 100 wraps
Include video camera and video acquisition transmission terminal 120.With reference to Fig. 2, wireless video monitoring system includes 400 He of multiple client equipment
Above-mentioned wireless video monitoring equipment.
Second audio/video information of the real-time collection site of video camera, video acquisition transmission terminal 120 believe the second audio and video
Breath carries out generating live audio/video information after analog-to-digital conversion, the processing such as compressed encoding, video acquisition transmission terminal 120 also with wirelessly
Network element 200 establishes data link, and live audio/video information is transmitted to video management server using 3G/4G technologies
300, video management server 300 carries out the management such as concentration video recording, real-time recording, editor to live audio/video information, generates the
One audio/video information, and it is according to user right that the first audio/video information is concurrent to multiple client devices 400, and use
The dispatch command of client device 400 is sent to video acquisition transmission terminal 120, video acquisition transmission terminal by 3G/4G technologies
120 carry out remote control according to dispatch command and by PTZ agreements to video camera.
Wherein, China Mobile, China Telecom, China Unicom three kinds of 3G/4G technologies may be used in radio network unit 200
Any wireless technology.
Wireless video collecting transmission unit 100 further includes headset, reserve battery and charging equipment etc., and video camera and video are adopted
Collect transmission terminal 120 by RS485 interfaces or RS232 interface to be connected.Video acquisition transmission terminal 120 can set for waist-pack type
Standby, Backpack type equipment or box-type equipment；Video camera is pinhole camera, sucked type video camera or ball-shaped cloud platform video camera 111
Deng.
Wireless video monitoring equipment starts and according to parameter preset automatic running.Second sound of the real-time collection site of video camera
Video information.Resolution of video camera is 352 × 288 or 704 × 576, reaches as high as 25 frames/s.
Video acquisition transmission terminal 120 carries out the processing such as analog-to-digital conversion, optimization compression to the second audio/video information, generates existing
Field audio/video information.Video acquisition transmission terminal 120 uses embedded real-time multi-task operating system and embeded processor, complete
Total detachment PC (personal computer, personal computer) platform, more reliable and more stable, external lug is all using aviation
Connector carries out the processing such as analog-to-digital conversion, optimization compression based on H.264 the second audio/video information of video processing technique pair, generates existing
Field audio/video information.On the network foundation of 3G bandwidth, video acquisition transmission terminal 120 can be to reach as high as every road image 30
The speed of frame/s (NTSC) or 25 frames/s (PAL), the full high-resolution of transmission in real time, quasi- DVD effect images.Video acquisition transmission terminal
120 correspond to frame per second under different bandwidth is：3~8 frames of 64Kbps -/s, 6~15 frames of 128Kbps -/s, 256Kbps -12~25
Frame/s supports high quality two-way voice talkback, audio-visual synchronization transmission, ultralow code check, CBR and VBR and bandwidth self-adaption.
Meanwhile wireless video collecting transmission unit 100 establishes data link with radio network unit 200, and use 3G/4G
Live audio/video information is transmitted to video management server 300 by technology.
In addition, video acquisition transmission terminal 120 supports electronic map to access, based on spatial database, number will be applied
It is organically combined according to map, powerful spatial analysis and query function is provided, result is intuitively shown with abundant expression way.
Video management server 300 is recombined the live audio/video information received by video processing program, raw
At the first audio/video information, and according to user right, by release process by the first audio/video information Real-time and Concurrent to multiple visitors
Family end equipment 400；The monitor run in video management server 300 can according to demand carry out the video image currently monitored
Real-time recording.Video management server 300 may include standalone version Server system software, support multiple terminals concurrent transmission
(it is concurrent to could support up 200 client devices 400), if you need to support more terminal concurrence quantity, using WSH distributed systems
Management software platform support more people watch simultaneously with all the way or multiple paths of video images (viewing supports 300 with system maximum all the way
Client device 400 is watched simultaneously), it supports rights management, supports video wall, notebook, the viewing of PC computer wire/wireless.Depending on
The user identity that frequency management server 300 is based on SSL (SecureSockets Layer, Secure Socket Layer) identifies function, uses
Damascene structures design, built in hardware dog, ensure that system run all right is reliable.
Warning button is additionally provided on video acquisition transmission terminal 120, when there is accident generation, triggering warning is pressed
Button, so that video management server 300 carries out gang video recording, meanwhile, video management server 300 can also regard the sound of acquisition
Frequency information is into edlin.
400 the first audio/video information of real-time exhibition of client device, and interacted by double-directional speech and initiate dispatch command.
In turn, which is sent to video acquisition transmission terminal 120 by video management server 300 using 3G/4G technologies.
Video acquisition transmission terminal 120 supports a variety of PTZ (Pan/Tilt/Zoom, cradle head control) agreement, agreement expansible
Independent RS232 serial ports and RS422/485 serial ports are realized according to dispatch command to high-speed ball-forming machine, video camera or other integrated productions
The remote control of product, such as：The aperture of comprehensive operation and control and camera lens, the behaviour of focal length, depth of field distance are done to holder
It controls, with comprehensive control field condition.
Client device 400 can be but be not limited to include video wall, computer and notebook.
Wireless video monitoring system can also include GPS locator；GPS locator passes through RS232 interface and video acquisition
Transmission terminal 120 is connected, and is positioned by wireless network.
Video acquisition transmission terminal 120, video management server 300 and client device 400 can be by corresponding sounds
Video information or other data informations are stored.
The special 3G/4G wireless video monitorings equipment of engineering and system that above-described embodiment provides are suitable for various outdoor big
Type engineering, it is by wireless video collecting transmission unit 100 and radio network unit 200 that the audio and video of on-site supervision are real-time
Monitoring center is passed on ground back, is convenient for remote supervisory, commander and scheduling；When accident occurs, video management server 300 uses
The dispatch command of client device 400 is sent to video acquisition transmission terminal 120 by 3G/4G technologies in time, can greatly be contracted
Short reaction time is convenient for fast remote dispatch control, it is ensured that processing procedure is in time, effectively.
Embodiment two：
Fig. 3 is the wireless video monitoring equipment schematic diagram that the utility model embodiment two provides.
IP65 standards, rain-proof, shock resistance are met using the wireless video monitoring equipment of box-type equipment, it can be with local keyboard control
System；It is easy to use using the wireless pinhole camera of wireless video monitoring equipment collocation and earphone-microphone of waist-pack type equipment；Using
The wireless video monitoring equipment of Backpack type equipment is transmitted using double card, it is ensured that smooth video is transmitted when network is poor.
Fig. 3 illustrates the wireless video monitoring equipment of box-type equipment.The wireless video monitoring equipment of the box-type equipment is applicable in
In the routine monitoring monitoring in industrial enterprise, construction site, to the emergent defendance of the scene of the accident, emergent when unexpected incidents occur
Rescue, mobile monitor, mobile command activity.Video acquisition transmission terminal includes ball-shaped cloud platform video camera 111, connecting rod 130, control
Panel 140 and 3G/4G connection sockets for antenna 150 processed.130 longest of connecting rod may extend to three meters.
The utility model embodiment brings following advantageous effect：The wireless video monitoring that above-mentioned multiple embodiments provide is set
Standby and system, including：It is set to live wireless video collecting transmission unit and radio network unit and is set in monitoring
The video management server of the heart, wireless video collecting transmission unit include video acquisition transmission terminal and video camera；Video camera is real
When collection site the second audio/video information, the second audio/video information of video acquisition transmission terminal pair handle after generate scene
Audio/video information, video acquisition transmission terminal also establish data link with radio network unit, and will be live using 3G/4G technologies
Audio/video information is transmitted to video management server, and video management server is managed live audio/video information, generates the
One audio/video information, and it is according to user right that the first audio/video information is concurrent to multiple client devices, and use 3G/4G
The dispatch command of client device is sent to video acquisition transmission terminal by technology, and video acquisition transmission terminal is according to dispatch command
And remote control is carried out to video camera by PTZ agreements.The utility model is improved by providing the smooth wireless network stablized
Remote monitoring, the flexible response ability of scheduling.
In all examples being illustrated and described herein, similar label indicates similar with letter in following attached drawing
, therefore, once being defined in a certain Xiang Yi attached drawing, then it need not further be defined in subsequent attached drawing
And explanation.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, in another example, multiple units or component can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be by some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in the executable non-volatile computer read/write memory medium of a processor.Based on this understanding, this practicality
Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for novel technical solution
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that computer equipment (can be personal computer, server or the network equipment an etc.) execution the utility model is each
The all or part of step of embodiment the method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Etc. the various media that can store program code.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to aforementioned
The utility model is described in detail in embodiment, it will be understood by those of ordinary skill in the art that：It is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to the skill recorded in previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation is replaced, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model is answered described is wanted with right
Subject to the protection domain asked.
Claims (10)
1. a kind of wireless video monitoring equipment, which is characterized in that including：Be set to scene wireless video collecting transmission unit and
Radio network unit and the video management server for being set to monitoring center；
The wireless video collecting transmission unit establishes data link with the radio network unit, and uses 3G/4G technologies will
The live audio/video information of acquisition is transmitted to the video management server, and the video management server regards the live sound
Frequency information is managed, and generates the first audio/video information, and carried out in real time to first audio/video information according to user right
Publication.
2. wireless video monitoring equipment according to claim 1, which is characterized in that the wireless video collecting transmission unit
Including：Pass through RS485 interfaces or RS232 interface connected video acquisition transmission terminal and video camera；
Second audio/video information of the real-time collection site of video camera, the video acquisition transmission terminal regard second sound
Frequency information is handled, and the live audio/video information is generated.
3. wireless video monitoring equipment according to claim 2, which is characterized in that set on the video acquisition transmission terminal
It is equipped with warning button, in the case where triggering the warning button, the video management server carries out gang video recording.
4. wireless video monitoring equipment according to claim 2, which is characterized in that the video camera be pinhole camera,
Sucked type video camera or ball-shaped cloud platform video camera.
5. wireless video monitoring equipment according to claim 2, which is characterized in that the video acquisition transmission terminal is waist
Packet mode equipment, Backpack type equipment or box-type equipment.
6. wireless video monitoring equipment according to claim 2, which is characterized in that the video acquisition transmission terminal uses
Embedded real-time multi-task operating system and embeded processor.
7. wireless video monitoring equipment according to claim 2, which is characterized in that the wireless video collecting transmission unit
Further include reserve battery and charging equipment.
8. wireless video monitoring equipment according to claim 1, which is characterized in that further include GPS locator；
The GPS locator is connected with video acquisition transmission terminal, is positioned by wireless network.
9. a kind of wireless video monitoring system, which is characterized in that further include such as claim 1~8 including multiple client equipment
Any one of them wireless video monitoring equipment；
Video management server in the wireless video monitoring equipment by the first audio/video information and is sent to according to user right
Multiple client equipment, and the dispatch command of the client device is sent to by video acquisition transmission using 3G/4G technologies
Terminal；
The client device shows first audio/video information, and initiates the dispatch command；
The video acquisition transmission terminal carries out long-range according to the dispatch command and by cradle head control PTZ agreements to video camera
Control.
10. wireless video monitoring system according to claim 9, which is characterized in that the client device includes TV
Wall, computer and notebook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820243951.5U CN207820113U (en) | 2018-02-09 | 2018-02-09 | Wireless video monitoring equipment and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820243951.5U CN207820113U (en) | 2018-02-09 | 2018-02-09 | Wireless video monitoring equipment and system |
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| CN207820113U true CN207820113U (en) | 2018-09-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108076328A (en) * | 2018-02-09 | 2018-05-25 | 山东路科公路信息咨询有限公司 | Wireless video monitoring equipment and system |
| CN112260846A (en) * | 2019-07-22 | 2021-01-22 | 南京明德软件有限公司 | Test data acquisition network topological structure system |
| CN113660458A (en) * | 2021-07-21 | 2021-11-16 | 艾奕康设计与咨询(深圳)有限公司 | Video patrol device for constructional engineering |
| CN115243112A (en) * | 2022-06-07 | 2022-10-25 | 苏州思萃工业互联网技术研究所有限公司 | Device that surveillance video traced to source |
-
2018
- 2018-02-09 CN CN201820243951.5U patent/CN207820113U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108076328A (en) * | 2018-02-09 | 2018-05-25 | 山东路科公路信息咨询有限公司 | Wireless video monitoring equipment and system |
| CN112260846A (en) * | 2019-07-22 | 2021-01-22 | 南京明德软件有限公司 | Test data acquisition network topological structure system |
| CN112260846B (en) * | 2019-07-22 | 2023-10-17 | 南京明德软件有限公司 | Test data acquisition network topology structure system |
| CN113660458A (en) * | 2021-07-21 | 2021-11-16 | 艾奕康设计与咨询(深圳)有限公司 | Video patrol device for constructional engineering |
| CN115243112A (en) * | 2022-06-07 | 2022-10-25 | 苏州思萃工业互联网技术研究所有限公司 | Device that surveillance video traced to source |
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