CN1471247A - Remote digital monitoring system and transmission method thereof - Google Patents
Remote digital monitoring system and transmission method thereof Download PDFInfo
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- CN1471247A CN1471247A CNA021266360A CN02126636A CN1471247A CN 1471247 A CN1471247 A CN 1471247A CN A021266360 A CNA021266360 A CN A021266360A CN 02126636 A CN02126636 A CN 02126636A CN 1471247 A CN1471247 A CN 1471247A
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- wavelength division
- surveillance center
- division multiplexer
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Abstract
The system and method are applicable to safety guard areas such as in bank and chained supermarket. Bi-directional remote transmission can be carried out through a shared optical fiber for monitored signals of image, audio, alarm, data and commands and service signal by using technique of wavelength division multiplex/dense set wavelength division multiplex. Integral centralized control is implemented when operation or process for storing, searching, calling, playing back as well as collecting and treating real time information or diachronic information by using embedded firmware and hard disc storage device and matrix. One monitoring center can control several tens front ends of network point. Some monitoring centers constitute the monitoring center in up level. Thus, the monitoring system can be built in large scale.
Description
Technical field
The present invention relates to a kind of digital monitor system of safety precaution, particularly a kind of remote digital monitoring system and transmission system thereof, this system be mainly used in units such as bank, chain supermarket, unattended operation ATM automatic teller machine, place business, face the monitoring of cabinet condition and safety precaution, also be useful in place and department that factor such as other security needs remote monitoring, commander, scheduling.
Background technology
Existing supervisory control system, its fore-end generally adopts home video tape recording, and display control apparatus is located in the site at front end place, directly writes down and manages, and shooting with video-corder of front-end information controlled by the central control room at front end place, belongs to decentralized control; The mode of the employing industrial computer/PC that has, its shortcoming are easy deadlocks, difficult operation; The need that have are laid special optic fibre and are promptly taken fiber resource separately, have increased expense and difficulty of construction; Gating matrix/controller that the employing that has is traditional, but can only control and manage current images, sound, can't have access to, playback lasts information, and controlled signal way is few, the information gathering of point and the message transmission of line have also promptly only been realized, can't realize more can't realizing the horizontal transmission of Information and the control of face, therefore can't realize system-wide unified monitoring by the informix control and management of line to point.
In addition, display control program and camera-shooting and recording device are distributed in the front end site, and because of the region disperses, fault is many, maintaining inconvenience, and have unsafe factor (possibility that the internal staff commits a crime to the control system of site).
The front end monitoring of present unattended ATM automatic teller machine also is difficult to management, in case go wrong, incurs loss through delay public security department and solves a case the time.
Summary of the invention
The purpose of this invention is to provide a kind of remote digital monitoring system and transmission method thereof that can overcome above-mentioned shortcoming, utilization digitizing technique and equipment, realization multichannel bidirectional remote instant, that last information (image, sound, warning, data etc.) transmit, store, call and can carry out Comprehensive Control to collection, the processing of information.
The present invention realizes that the technical scheme that above-mentioned purpose adopts is: the watch-dog of the front end site of this long-range digital monitor system contains camera-shooting and recording device, multi-channel video audio frequency optical sender, wavelength division multiplexer; Transmission facilities contains optical fiber and coaxial cable, electric wire; Wavelength division multiplexer, optical receiver, video/audio gating matrix, DVR, peripheral apparatus are contained in Surveillance center, and the watch-dog of front end site links to each other by transmission equipment with Surveillance center.
The wavelength division multiplexer of control centre of the present invention, optical receiver, DVR are formed array respectively.
The present invention looks digital curing Control Software is installed in audio frequency gating matrix, the DVR.
Wavelength division multiplexer of the present invention is a dense wave division multiplexer.
The monitoring of front end of the present invention site comprises the monitoring to the ATM ATM.
The present invention realizes that the technical scheme that above-mentioned purpose adopts also comprises: the transmission method of long-range digital monitor system, the video that gather its front end site, audio frequency, data-signal and service signal, through optical sender, wavelength division multiplexer passes through the optical fiber forward transmitted to Surveillance center's partial wave after closing ripple, enter gating matrix and embedded hard disc video tape recorder through light-receiving, the command information of Surveillance center, from gating matrix through optical receiver, wavelength division multiplexing closes ripple, by the optical fiber reverse transfer behind the front end wavelength division multiplexer partial wave, through optical receiver, control calling of camera-shooting and recording device and information, playback.
Surveillance center of the present invention can monitor several front end sites simultaneously, and several Surveillance center build up more upper level Surveillance center by cascaded series, between Surveillance center networking and carry out each other that two-way multichannel is looked, audio frequency, transfer of data.
Advantage of the present invention and effect are: 1, used optical fiber, coaxial cable mixing (HFC) transmission technology in digital centralized monitoring system: 2, in supervisory control system, utilize professional optical fiber, under the situation that does not influence business data transmission, utilize wavelength division multiplexing, dense wave division multipurpose (DWDM) technology that the integrated information of signal such as the video of front end site, audio frequency, data, alarm and Surveillance center at different levels is carried out quick transmission multichannel, two-way; In the supervisory control system that the embedded solidification software of numeral is applied in the cascade of matrix and digital hard disk memory device, intensive control, call.In a word, the intensification of the present invention's height is monitored in real time and has been improved management mode, and the total digitalization record has improved digital reliability, and wavelength-division multiplex technique has made full use of fiber resource, and product technology is easy to utilize reliably, has market prospects preferably.
Description of drawings
Accompanying drawing 1 is Surveillance center's cell schematics of the present invention.
Accompanying drawing 2 is a sub-Surveillance center of the present invention and the related schematic diagram of upper level control centre.
Wherein, the thick line among Fig. 1, Fig. 2 represent to look, audio signal; Fine rule is represented data, control signal; The expression fiber-optic signal that circle is arranged.
Embodiment
Referring to Fig. 1, (can be contained on the omnibearing The Cloud Terrace by the front end site video camera of (containing the ATM ATM); Round-the-clock dust cover, motor-driven lens, camera signal automatic switching control equipment and induction installation can be arranged) picture signal that obtains, the voice signal that detectaphone obtains, the alarm signal that alarm detector obtains (passing through signal picker), through the multichannel that stube cable/electric wire is separately sent into this front end site look, the audio frequency optical sender.Behind modulation or coding, the light signal that has carried above-mentioned monitor message is sent into the wavelength division multiplexer of transmitting terminal (this front end site) through optical patchcord, has carried the light signal of banking business data simultaneously and has also sent into this wavelength division multiplexer through optical patchcord in machine.Through the ripple effect of closing of wavelength division multiplexer, (its distance can reach tens through same optical fiber with different wavelength this two classes light signal
The hundreds of kilometer) is sent to the wavelength division multiplexer of receiving terminal (central control room).Partial wave effect through wavelength division multiplexer, the light signal that has carried banking business data is sent into banking business data through optical patchcord and is handled light and receive machine, and the light signal that has carried above-mentioned monitor message through the multichannel that optical patchcord arrives receiving terminal (central control room) look, the audio frequency optical receiver.Because can there be a plurality of sites at a center, so be (multichannel is looked, an audio frequency optical receiver) array.Receive the demodulation or decoding of machine through light after, alarm signal is sent into through the alarm linkage device and is large-scalely looked, the audio frequency gating matrix, starts the embedded hard disc video tape recorder functions such as video recording of reporting to the police by matrix; Each road is looked, audio signal is then sent into the embedded hard disc video tape recorder respectively through stube cable/electric wire separately and carried out the digitlization storage of recording a video in real time.Because can there be a plurality of front ends site in a control centre, each front end site has a plurality of control points again, so the wavelength division multiplexer of receiving terminal (central control room), multi-channel video audio frequency optical receiver, embedded hard disc video tape recorder are formed array respectively.
The pilot signal of a plurality of remote front-ends site, after closing ripple through the business datum signal of separately transmitting terminal wavelength division multiplexer and bank, through optical fiber separately, be transferred to the wavelength division multiplexer array of receiving terminal (central control room), through its partial wave effect, the light signal that has carried banking business data is sent into banking business data through optical patchcord handle optical receiver; And carried the remote front-end site monitor message light signal through the multichannel that optical patchcord arrives receiving terminal (central control room) look, audio frequency optical receiver array.After demodulation or decoding, video, audio signal are sent into embedded hard disc video tape recorder array; Data-signal is sent into and is large-scalely looked, the audio frequency gating matrix.
In addition, need to prove, in the Optical Fiber Transmission of the pilot signal of security protection, all adopted close wavelength-division multiplex technology, promptly a wavelength is carried out multidirectional audio frequency, the data-signal looked of transmission behind the dense wavelength division.
The present invention also brings into the safety precaution of ATM ATM in the digital monitor system, ATM ATM front end is installed one and is with two-way video camera induction device for switching, switching signal is directly inserted optical transceiver to be uploaded, simultaneously for strengthening management, ATM ATM outside has been installed a cover protective cover again, and the automatic gate inhibition of employing magnetic induction, technology such as automatic speech broadcast and alarm linkage.The looking of ATM automated teller machine monitoring, audio frequency, data to Surveillance center, are controlled, store, called and backed up by Surveillance center.
The signal that gather in-plant front end site then not by optical fiber, but adopts coaxial cable/electric wire to be transferred to embedded hard disc video tape recorder array.
The looking of embedded hard disc video tape recorder array, audio output signal, deliver to through cable/wire large-scalely look, the audio frequency gating matrix, again from large-scalely look, the delivery outlet of audio frequency gating matrix delivers to display device and printing device by cable/wire.For example PDP display, projection TV, monitor, printer etc.
From the front end site to large-scalely look, the transmission means of audio frequency gating matrix is called forward transmitted, otherwise and from large-scalely look, the transmission means of audio frequency gating matrix forward end site is called reverse transfer.
By to large-scalely look, button on the audio frequency gating matrix panel or external keyboard operate, can control total system.For example: to the calling of current realtime graphic, to the document image retrieval in (past or current), playback etc.Large-scale looking, sound control system matrix is to realize by connecting through the cascade function (at the RJ45 mouth) of embedded hard disc video tape recorder with the RS-485 standard signal to the control signal of embedded hard disc video tape recorder, and to the control signal of the The Cloud Terrace of front end site, be with the wavelength division multiplexer of RS-485 standard signal by receiving terminal (central control room), arrive the wavelength division multiplexer of transmitting terminal (front end site) again through common optical fiber, sending into the multichannel of front end site looks, the audio frequency optical sender, through oppositely receiving, after the demodulation, deliver to the decoder of comprehensive The Cloud Terrace motor-driven lens, thereby realize on the The Cloud Terrace motor-driven lens, down, a left side, right, focusing, the control of functions such as zoom.
The branch of front end site is controlled multimedia request, control signal, be give through above-mentioned forward transmitted mode large-scalely look, the audio frequency gating matrix, if in authority (Permission Levels can be set by management software), then large-scalely look, audio frequency gating matrix response request, carry out the calling of image, retrieval, playback, and look accordingly, audio signal delivers to branch control multimedia along the reverse transfer mode.Can carry out the recorded and stored, printing of important information (image, sound) etc. on the multimedia in minute control.
The authority of on management computer, carrying out, password setting, set up defences withdraw a garrison etc. control signal by the RS-485 standard signal and large-scalely look, the audio frequency gating matrix carries out communication and realizes.
The control of above-mentioned various functions is all looked by being installed in, the digital solidification software in audio frequency gating matrix and the embedded hard disc video tape recorder is realized.
Referring to Fig. 2, narrate the expansion of ultra-large type monitor network of the present invention: according to bank's administrative hierarchy and distribution, need classification to set up Surveillance center, and between Surveillance center at different levels, set up bigger monitoring network system between Surveillance center at the same level, large-scale the looking of next stage Surveillance center (subcenter), looking of audio frequency gating matrix, audio output signal and RS-485 standard signal, can look through the two-way multichannel that cable/wire is sent into subcenter, the audio frequency optical sender, through subcenter wavelength division multiplexer and the banking business data signal common optical fiber sent into simultaneously, be sent to the wavelength division multiplexer of remote upper level Surveillance center, after the partial wave effect, isolate looking of subcenter, audio output signal and RS-485 standard signal, sending into the two-way multichannel of this upper level Surveillance center looks, the audio frequency optical receiver, wither or decoded looking through separating, audio signal and RS-485 standard signal are sent into the large-scale of this upper level Surveillance center through the subnet hub and are looked, the audio frequency gating matrix can be called by it, retrieval, playback etc.
And a such higher level Surveillance center can pass through several subnet hub cascade experimental process centers; And several such higher level Surveillance center set up the more Surveillance center of upper level in the same way, thereby obtain ultra-large monitoring network system.
Embodiment 1:
This is the embodiment that the present invention's large-scale (city-level and more than the city-level) bank monitoring center is set up.
1, the fore-end native system first phase engineering of supervisory control system is built together and is established 16 of front end sites, and the headend equipment of each front end site is made up of the safety monitoring of the savings of facing cabinet, cashier, business monitoring and business hall, warehouse, passage, machine room, armoured van anchor point and the monitoring of ATM ATM.Totally 262 of business and security monitoring cameras are installed, intercom and detectaphone device 132 covers, switching video camera 2 covers of ATM ATM, alarm linkage device 17 covers.
The video camera that system front end adopts is the line colour TV camera of financial tailored version, and is furnished with automatic diaphragm lens.In order to realize that master control is carried out light video recording to the alarm signal of control point and other interlocks are handled, system has also disposed a signal picker in each front end site, the signal that gather each front end site by optical sender and wavelength division multiplexing after optical fiber upload.
2, the hop of system
In order to realize the centralized control to far-end outlet, according to the on-site field condition of branch bank, system has adopted existing professional fiber optic network, under traffic affecting prerequisite not, look closely before the site, urban district, audio signal transmission is to Surveillance center.Because the master control of professional fiber optic network (computer center of city branch) is man-to-man pattern and each site networking, therefore, we respectively dispose one in each site to the center and overlap wavelength division multiplexer, simultaneously disposed serial optical transceiver according to the different demands of the video of each site transmission, audio frequency, bi-directional data, two way audio again, formed that a full real-time Transmission is looked, the monitor network of audio signal.
3, the core of system
The central apparatus of system is by system master, the storage of digitlization hard disc recording, compositions such as large scale display.The system centre structure as shown in Figure 2.
System master: system master equipment is by large-scale matrix switching controls main frame, Audio Matrix main frame, alarm interface unit, cascade controller, warning follower, global function supervisory keyboard, and the cascade supervisory keyboard is formed.System master equipment can satisfy front end 262 road camera shooting and videos input of existing site, and 132 the tunnel intercept the audio frequency input, and the keyboard controller of the input of No. 16 monitors and 16 tunnel.Surveillance center consults and duplicates all images, sound, Video Document control as long as the operation Master Keyboard just can be carried out; Control to video camera zoom lens and The Cloud Terrace; Management function to the systems such as setting up defences and withdraw a garrison of the switching on and shutting down of storage facilities and alarm has realized real centralized control.
The digital recording storage area: system has disposed also that 132 single channel are looked, audio frequency DVR and 9 ten six tunnel many pictures digital hard disc video recorders except having disposed powerful central control equipment.For business being faced the looking of cabinet, needs that audio frequency carries out real time record, disposed and had that the adjustable Embedded single channel of Pyatyi definition is looked, the audio frequency video tape recorder, and at the hard disk of every built-in 2 80G of DVR, system is set to third gear pattern (VCD form), can preserve look, AV one month.System adopts the video of security protection has dynamically scout 16 way word DVR of technology, 16 picture segmentation functions of video, the hard disk of built-in 160G can be preserved one month image on request by the pattern video recording that the pattern and the video of different compressed image sizes are dynamically recorded a video.System carries out special processing to the alert image, special configuration two single channel digital VTRs, by these two DVR stored records, the hard disk of every built-in 80G, alert can preserve three to more than six months to the image of all alarm linkages specially.
System memory devices all adopts digital hard disc video recorder, and the software of operating system is the embedded chip that solidifies, and has reduced " deadlock " phenomenon that adopts PC, industrial computer to occur, and has improved the reliability of system greatly.
Large-size screen monitors show: Surveillance center has disposed two plasma panels and two colour monitors, give a plasma picture segmentation of 16 way word DVR respectively, the form that can carry out nine pictures or 16, eight, four, single-image demonstration like this shows, large-screen can and be reported to the police by different function such as the zones of different of city's corresponding levels, subbranch's level and savings, cashier, business hall, ATM, passage, machine room and preferentially be shown and automaticallyes switch, makes the digital monitoring center function of system more apparent effective.
The branch control part of system: the Surveillance center of system is a private network that establishes one's own system fully, ten branch control computers of functional department at the corresponding levels and subbranch's level multimedia software has been installed and disposed look, the audio collection card, and encryption is provided with, the real-time image and the sound of administrative area freely be had access to, deposit, be duplicated to each minute control platform just can according to the extent of competence of setting on the multimedia computer of oneself like this.Because Surveillance center is integrated networking, the internet security height without authority setting, anyly can't enter private monitoring network per capita.
Embodiment 2:
This is the embodiment that the small-sized supervisory control system of the present invention is set up.Owing to be subjected to the restriction of circuit, the Sub-branches in counties in remote area adopts subnet line concentration pattern and higher level to carry out the professional networking of optical fiber in lines, therefore need set up the small-sized Surveillance center of subbranch's level.And between Sub-branches in counties and each sub-department, adopt Optical Fiber Transmission, also adopt the pattern of wavelength division multiplexing and look the voice-frequency-multichannel optical transceiver, the looking of each sub-department, audio signal are focused on Sub-branches in counties, Sub-branches in counties form one have that tens of roads business is looked, the Surveillance center at county level of audio frequency and tens of road security protection videos.System has adopted for this reason that a small-sized matrix system and Duo Tai single channel are looked, audio frequency DVR and 16 way word DVR.Like this, Surveillance center at county level just can finish the looking in real time of local system, Voice Surveillance management by small-sized matrix.Surveillance center at county level adopts the subnet expanding system, is concentrated to upper level Surveillance center again by fiber optic network and carries out big centralized control.
Claims (7)
1, a kind of long-range digital monitor system is characterized in that the watch-dog of front end site contains camera-shooting and recording device, multi-channel video audio frequency optical sender, wavelength division multiplexer; Transmission facilities contains optical fiber and coaxial cable, electric wire; Wavelength division multiplexer, optical receiver, video/audio gating matrix, DVR, peripheral apparatus are contained in Surveillance center, and the watch-dog of front end site links to each other by transmission equipment with Surveillance center.
2, long-range digital monitor system according to claim 1 is characterized in that wavelength division multiplexer, optical receiver, the DVR of control centre formed array respectively.
3, long-range digital monitor system according to claim 1 is characterized in that looking digital that curing Control Software being installed in audio frequency gating matrix, the DVR.
4, long-range digital monitor system according to claim 1 is characterized in that wavelength division multiplexer is a dense wave division multiplexer.
5, long-range digital monitor system according to claim 1, the monitoring that it is characterized in that the front end site comprises the monitoring to the ATM ATM.
6, a kind of transmission method of long-range digital monitor system, it is characterized in that video, audio frequency, data-signal and the service signal that gather the front end site, after closing ripple, optical sender, wavelength division multiplexer pass through the optical fiber forward transmitted to Surveillance center's partial wave, enter gating matrix and embedded hard disc video tape recorder through light-receiving, the command information of Surveillance center, close ripple from gating matrix through optical receiver, wavelength division multiplexing, by the optical fiber reverse transfer behind the front end wavelength division multiplexer partial wave, through optical receiver, the calling of control camera-shooting and recording device and information, playback.
7, transmission method according to claim 6, it is characterized in that described Surveillance center can monitor several front end sites simultaneously, and several Surveillance center build up more upper level Surveillance center by cascaded series, between Surveillance center networking and carry out each other that two-way multichannel is looked, audio frequency, transfer of data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB021266360A CN100370717C (en) | 2002-07-22 | 2002-07-22 | Remote digital monitoring system and transmission method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021266360A CN100370717C (en) | 2002-07-22 | 2002-07-22 | Remote digital monitoring system and transmission method thereof |
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| CN1471247A true CN1471247A (en) | 2004-01-28 |
| CN100370717C CN100370717C (en) | 2008-02-20 |
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| CNB021266360A Expired - Fee Related CN100370717C (en) | 2002-07-22 | 2002-07-22 | Remote digital monitoring system and transmission method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452872C (en) * | 2006-06-22 | 2009-01-14 | 孙强 | Embedded type network video monitor and control system |
| CN100525440C (en) * | 2006-09-13 | 2009-08-05 | 谭政 | Warm back-up method in use for video monitoring and controlling system |
| CN1835583B (en) * | 2005-03-18 | 2010-04-28 | 北京富星创业科技发展有限公司 | Security monitoring management system working method |
| CN101350662B (en) * | 2008-09-01 | 2010-06-23 | 成都优博创技术有限公司 | Cascade connection networking method based on xWDM wavelength-division multiplex RF far-drawing unit |
| CN101226664B (en) * | 2008-02-02 | 2011-01-26 | 北京海鑫科金高科技股份有限公司 | Intelligent monitoring system and method for self-help bank and ATM |
| CN101227600B (en) * | 2008-02-02 | 2011-04-06 | 北京海鑫科金高科技股份有限公司 | Intelligent monitoring apparatus and method for self-service bank and ATM |
| CN102339484A (en) * | 2010-07-14 | 2012-02-01 | 新谊整合科技股份有限公司 | Entrance guard and security system with function of video surveillance, and surveillance method thereof |
| CN103309298A (en) * | 2013-03-13 | 2013-09-18 | 四川天翼网络服务有限公司 | Financial industry video monitoring and analyzing system |
| CN104933003A (en) * | 2015-06-24 | 2015-09-23 | 成都广迈科技有限公司 | Self-coding computer communication system |
| CN106385571A (en) * | 2016-11-12 | 2017-02-08 | 国网山西省电力公司忻州供电公司 | Video monitoring system |
| CN112560789A (en) * | 2020-12-28 | 2021-03-26 | 平安银行股份有限公司 | Image object detection method and device, electronic equipment and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1210781A1 (en) * | 1999-08-20 | 2002-06-05 | Anritsu Company | Dense wavelength division multiplexer (dwdm) monitoring system |
| CN1255020A (en) * | 1999-11-10 | 2000-05-31 | 彭宏庆 | TV monitor system |
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2002
- 2002-07-22 CN CNB021266360A patent/CN100370717C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835583B (en) * | 2005-03-18 | 2010-04-28 | 北京富星创业科技发展有限公司 | Security monitoring management system working method |
| CN100452872C (en) * | 2006-06-22 | 2009-01-14 | 孙强 | Embedded type network video monitor and control system |
| CN100525440C (en) * | 2006-09-13 | 2009-08-05 | 谭政 | Warm back-up method in use for video monitoring and controlling system |
| CN101226664B (en) * | 2008-02-02 | 2011-01-26 | 北京海鑫科金高科技股份有限公司 | Intelligent monitoring system and method for self-help bank and ATM |
| CN101227600B (en) * | 2008-02-02 | 2011-04-06 | 北京海鑫科金高科技股份有限公司 | Intelligent monitoring apparatus and method for self-service bank and ATM |
| CN101350662B (en) * | 2008-09-01 | 2010-06-23 | 成都优博创技术有限公司 | Cascade connection networking method based on xWDM wavelength-division multiplex RF far-drawing unit |
| CN102339484A (en) * | 2010-07-14 | 2012-02-01 | 新谊整合科技股份有限公司 | Entrance guard and security system with function of video surveillance, and surveillance method thereof |
| CN102339484B (en) * | 2010-07-14 | 2014-06-25 | 新谊整合科技股份有限公司 | Entrance guard and security system with function of video surveillance, and surveillance method thereof |
| CN103309298A (en) * | 2013-03-13 | 2013-09-18 | 四川天翼网络服务有限公司 | Financial industry video monitoring and analyzing system |
| CN104933003A (en) * | 2015-06-24 | 2015-09-23 | 成都广迈科技有限公司 | Self-coding computer communication system |
| CN106385571A (en) * | 2016-11-12 | 2017-02-08 | 国网山西省电力公司忻州供电公司 | Video monitoring system |
| CN112560789A (en) * | 2020-12-28 | 2021-03-26 | 平安银行股份有限公司 | Image object detection method and device, electronic equipment and storage medium |
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|---|---|
| CN100370717C (en) | 2008-02-20 |
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