CN204013884U - Radar video supervisory control system - Google Patents
Radar video supervisory control system Download PDFInfo
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- CN204013884U CN204013884U CN201420380522.4U CN201420380522U CN204013884U CN 204013884 U CN204013884 U CN 204013884U CN 201420380522 U CN201420380522 U CN 201420380522U CN 204013884 U CN204013884 U CN 204013884U
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Abstract
The utility model provides a kind of with low cost, radar video supervisory control system that cost performance is high.Comprise a radar monitoring system and a video monitoring system; Described radar monitoring system comprises one or many radar front end, the radar terminal being connected with radar front end; Described video monitoring system comprises a monitoring host computer and one or multiple cameras; Described radar terminal is connected by wire/radio network with monitoring host computer.Have that cost performance is high, easy operating, dependable performance and set up the advantages such as simple; on ground, the water surface (sea) scouts, harbor traffic management, anti-smuggling; in oil field, the security monitoring in the strategic point such as airport, large-scale goods yard, large-scale water Dam, petroleum pipeline, in fields such as ecological protection, anti-terrorisms, have boundless application prospect.
Description
Technical field
The utility model relates to microwave sounding technology and the married technical field of optical monitoring technology, relates in particular to a kind of radar video supervisory control system.Can obtain applying very widely in security field.
Background technology
At present, all kinds of safety-protection systems (Security & Protection System, SPS) are generally used in the safety precaution facility of zonule.These safety-protection systems are to safeguard that social public security is object, the intrusion alarm system that application safety strick precaution product and other Related product form, perimeter alarm system, video security monitoring system, gateway control system, anti-explosion safety check system etc.; Or be subsystem combination or integrated electronic system or network by these systems.These systems are general only to be used for zonule safety precaution, and operating distance is near, conventionally take optical detection equipment as main, as common CCTV camera, thermal camera etc.
For remote monitoring, as forest fire protection, land and sea border defense monitoring etc., adopt burnt video camera far away and thermal camera to form supervisory control system, guarded region is carried out to monitoring and observation round the clock, its monitoring radius is generally in 20Km.These supervisory control systems need manpower intervention, are difficult to realize monitoring automation.If guarded region is very large, or guarded region composition is complicated, to the demand of equipment and manpower, is very large.
Adopt small-scale terrestrial (water surface) reconnaissance radar can realize the automatic monitoring of long-distance large-range.Along with the development of microelectric technique, the cost of reconnaissance radar key components used significantly reduces, and makes ground reconnaissance radar gradually from the military commercial market of moving towards, and its operating radius can reach 10～30Km, in civilian monitoring field, brings into use.In conjunction with adopting up-to-date Radar Signal Processing Technology and GIS-Geographic Information System (GIS) technology, small-scale terrestrial (water surface) reconnaissance radar will become the important detecting devices of large area monitoring system.
Compare with optical monitoring equipment, adopting the outstanding advantages of ground reconnaissance radar is to realize automatic monitoring round-the-clock, round-the-clock to guarded region, can find in real time ground (water surface) moving target with active mode, and can accurately determine position and the kinematic parameter of target, because of but the desirable watch-dog of large area monitoring system.
Yet the major defect of radar detection is that target recognition accuracy is not high.Although radar imagery technology can make up the deficiency of this respect, the two-dimensional imaging technology of radar is mainly the identification for aerial and waterborne target.Identification on a surface target mainly still utilizes one-dimensional image technology to improve the identification correctness to target.
Optical monitoring equipment has just in time made up the deficiency of radar detecting equipment, can carry out optical imagery to target, makes people can accurately identify target.
Therefore, ground reconnaissance radar and optical detection equipment are combined with, the good region Automatic monitoring systems of component property just become problem in the urgent need to address in the industry.
Utility model content
In order to address the above problem, the utility model provides a kind of radar video supervisory control system, by radar initiatively find, location and tracked mobile target, and guided optical equipment Tracking Recognition target.This new system will significantly promote the intelligent level of supervisory control system, and the monitoring performance of security system is greatly improved.
The purpose of this utility model is to provide a kind of with low cost, radar video supervisory control system that cost performance is high for applications such as security and supervisory control systems.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of radar video supervisory control system, comprises a radar monitoring system and a video monitoring system;
Described radar monitoring system comprises one or some radar front ends, the radar terminal being connected with radar front end;
Described video monitoring system comprises a monitoring host computer and one or some video cameras;
Described radar terminal is connected by wire/radio network with monitoring host computer.
Described radar front end comprises that a detection main frame, a front controller, drive The Cloud Terrace and an electric power conversion apparatus; Electric power conversion apparatus is electrically connected to detection main frame, front controller and driving The Cloud Terrace; Drive The Cloud Terrace to support radar front end and drive radar front end to rotate.
Described radar video supervisory control system also comprises a power supply module, in order to radar front end is powered, and is electrically connected to radar terminal by network.
Described detection main frame comprises antenna, frequency synthesizer, transmitter, receiver and signal processor.
Described antenna comprises a transmitting antenna and the reception antenna being fixed in a frame.
Described frequency synthesizer is the frequency synthesizer of transmitting linear frequency modulation continuous wave.
Described radar terminal is desktop computer or portable computer.
Described video monitoring system also comprises a video storage device and the some video stations being connected with monitoring host computer.Between three, data and control command transmit and all by network, realize, and communication protocol adopts ICP/IP protocol.
Between described radar front end and radar terminal and between radar terminal and monitoring host computer, all by LAN cable, be connected.
Another object of the present utility model is to provide another radar video supervisory control system, comprises a radar monitoring system and a video monitoring system;
Described radar monitoring system comprises some radar front ends, a switch and a radar terminal, and described radar front end connects switch jointly, and described switch is connected with radar terminal;
Described video monitoring system comprises a monitoring host computer and a plurality of camera head;
Described radar terminal is connected by a wireless communication terminal with monitoring host computer.
Radar video supervisory control system described above, radar terminal, by radar terminal software, electronic chart, provides radar man-machine interface, realizes operator controlling multi-section radar front end.Meanwhile, radar terminal is also connected with video monitoring system by network, can command the definite position of camera points radar of video monitoring system, and video information data are delivered to radar terminal.The video monitoring system of multi-section radar front end, radar terminal and Adoption Network Control on Communication forms an organic whole, by radar detection discovery, the personnel that follow the tracks of ground (water surface) motion, vehicle, ship etc., in conjunction with electronic chart, determine its position and kinematic parameter, and dispatch suitable picture pick-up device and point to selected target and focus on identification.As required, the admission information of radar detection information and picture pick-up device can local be stored, and also can send to higher level command post.
Compare with existing supervisory control system, the utlity model has following beneficial effect:
Hardware configuration of the present utility model is effectively simplified, its volume is little, cost is low, function is strong, and radar detection and optical monitoring are organically combined, be widely used, especially target automatic search and with the interlock of optical video supervisory control system aspect there is extraordinary application prospect, particularly when between radar monitoring system and video monitoring system, by wireless communication terminal, realize the situation that IP is connected, be more suitable for the use occasion that motion in the field is monitored.The utility model radar video supervisory control system has that cost performance is high, easy operating, dependable performance and set up the advantages such as simple; on ground, the water surface (sea) scouts, harbor traffic management, anti-smuggling; in oil field, the security monitoring in the strategic point such as airport, large-scale goods yard, large-scale water Dam, petroleum pipeline, in fields such as ecological protection, anti-terrorisms, have boundless application prospect.
Accompanying drawing explanation
Fig. 1 a is that the equipment of radar monitoring system in the utility model embodiment forms schematic diagram.
Fig. 1 b is the operation principle block diagram of radar monitoring system in the utility model embodiment.
Fig. 2 a is the networking schematic diagram of radar video supervisory control system in the utility model embodiment.
Fig. 2 b is the schematic diagram that in the utility model embodiment, radar video supervisory control system adopts wireless networking.
Fig. 3 a is the portable scheme of installation of radar monitoring system in the utility model embodiment.
Fig. 3 b is the fixed scheme of installation of radar monitoring system in the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.The operation principle of radar monitoring system is first described, puts off until some time later bright radar video supervisory control system operation principle.
1) radar monitoring system operation principle explanation
The equipment of radar monitoring system forms schematic diagram as shown in Figure 1a.Radar monitoring system comprises radar front end 1 and radar terminal 9, and radar terminal 9 connects and control radar front ends 1 by LAN cable 6, and LAN cable 6 is the longest reaches 100 meters, as farther in need, can be on LAN cable 6 interfaces adjunction optical transmitter and receiver.Radar front end 1 comprises surveys main frame 2, front controller 3, driving The Cloud Terrace 4, electric power conversion apparatus 5.In addition, also comprise power supply module 7 and as the tripod 8 of bracing or strutting arrangement.Drive The Cloud Terrace 4 to support radar front end and drive radar front end to rotate.Drive The Cloud Terrace 4 can be placed on tripod 8.Power supply module 7 is connected with driving The Cloud Terrace 4 cables and is radar front end 1 power supply.Power supply module 7 is also converted to LAN telecommunication cable 6 by radar cable 6a, is connected to radar terminal 9.
Radar terminal 9 can be a portable computer (or desktop computer), and radar special-purpose software is installed, and this radar special-purpose software provides radar man-machine interface, realizes operator controlling radar front end 1.
If Fig. 1 b is the fundamental diagram of radar monitoring system.In figure, show, radar monitoring system is mainly comprised of radar front end 1 (in dotted line frame), tripod 8, power supply module 7, radar terminal 9.Wherein, tripod 8 is for supporting radar front end 1, and power supply module 7 is for powering to radar front end 1.
The overwhelming majority work of radar monitoring system is completed by radar front end 1.Radar front end 1 is by surveying main frame 2, front controller 3, driving The Cloud Terrace 4, electric power conversion apparatus 5 to form.Wherein, survey main frame 2 and comprise antenna, frequency synthesizer, receiver, transmitter, signal processor.Rate synthesizer produces radar work wave, to transmitter, provides coherent to transmit, and to receiver, provides benchmark local oscillation signal; The radar wave that transmitter produces frequency synthesizer is sent by antenna after amplifying, and after antenna reception radar echo, sends to receiver to amplify, and receiver is sent to signal processor by amplifying signal and processes, and detects moving target.Front controller 3 is controlled the work of coordinating antenna, frequency synthesizer, receiver, transmitter, signal processor, controls the rotation of The Cloud Terrace simultaneously.
The function description of radar front end 1 composition module is as follows:
Antenna
Adopt microstrip antenna, transmitting antenna and reception antenna split, and are jointly arranged in a frame.Antenna gain >=25dB, the insulated degree requirement > 60dB between transmitting antenna and reception antenna, secondary lobe < 20dB.
Transmitter
Adopt solid state transmitter, transmitting power is adjustable between 10mW～2W.
Frequency synthesizer
Radar work adopts linear frequency modulation continuous wave, and the DDS in frequency synthesizer produces.Frequency synthesizer is the core of radar work, and it produces radar work wave, to transmitter, provides transmitting reference signal, to receiver, provides coherent local oscillation signal, provides clock signal, synchronizing signal to receiver, signal processor.
Receiver
As shown in Figure 1 b, receiver by low noise amplifier, frequency mixer, property filter, frequency window extract circuit, narrow-band amplifier forms.Wherein, low noise amplifier is the preamplifier before mixing, and its noise factor is answered < 1dB, gain >=25dB, and it is most important to guaranteeing the signal to noise ratio of receiving loop; Frequency mixer mixing and intermediate frequency amplify employing zero intermediate frequency scheme, and circuit structure is simple, needs to adopt characteristic filtering after mixing, and to eliminate the near-end impact of land clutter, the strong zero-frequency interference effect during simultaneously also mixing is down to minimum.Frequency is windowed and is extracted in the intermediate-freuqncy signal of circuit after the mixing of the receiver first order, by the frequency way of windowing, is extracted wherein a certain section of frequency spectrum and is processed separately, amplifies, and improves the signal to noise ratio of this section of frequency spectrum, for follow-up signal, processes high-quality signal is provided.
Signal processor
Signal processor is comprised of A/D conversion and digital signal processing module.The analog intermediate frequency output of receiver is converted to pure digi-tal signal after A/D conversion, and calculating afterwards and processing transfer to signal processing module to complete.The amount of calculation of processing due to signal is very large, and signal processing module takes DSP to add FPGA design on hardware, to guarantee the processing speed of this part circuit.
Digital signal processing module mainly completes to be found, locates and follows the tracks of the detection of moving target, and narrow band signal is processed and adopted two-dimensional fft technique and CFAR detection technology to complete the detection to low-speed motion target; By Kalman Forecasting Methodology, realize the tracking to target.
Mode of operation in signal processor is controlled it by front controller.
Front controller
Front controller 3 is an embedded processing module, and it directly accepts the various instructions that radar terminal 9 man-machine interfaces are sent, and is forwarded to other part of radar front end 1 after parsing, with control radar front end 1, by the expection of terminal man-machine interface, carries out work; In addition, front controller 3 also sends to radar terminal 9 the result of the working condition of detection main frame 2 each parts and signal processing, makes operator grasp at any time operating state and the target information of radar front end 1.Therefore, front controller 3 is control centres of radar front end 1, requires its working stability reliable, simple and compact for structure, therefore adopt embedded processing module to realize.
Electric power conversion apparatus
Electric power conversion apparatus 5 is DC-DC conversion assemblies, and it converts the DC voltage of power supply module 7 to supply voltage that radar front end 1 each module needs.Because this radar monitoring system adopts continuous wave system, thus need the output ripple of electric power conversion apparatus 5 very low, otherwise power supply disturbs the normal work that will have a strong impact on radar monitoring system.Secondly, because this radar monitoring system is when adopting portable mode work, use battery-poweredly, economize on electricity is the important performance requirement of this radar monitoring system, and therefore, this power conversion component need adopt the scheme that conversion efficiency is high.
Drive The Cloud Terrace
Driving The Cloud Terrace 4 is direct fastenings of radar front end 1, and it accepts front controller instruction, drives whole radar front end 1 (being mainly antenna) to rotate, the target that antenna alignment is detected.Meanwhile, also by front controller 3, to radar terminal 9, provide the real time information of antenna corner, be convenient to radar terminal 9 and process.
Drive the Design of Mechanical Structure of The Cloud Terrace should support the change of radar front end mounting means, make the radar can be with portable forms or the portable mounting means as shown in Fig. 3 a and Fig. 3 b and fixed mounting means.
The workflow of each module of radar front end
Operating personnel complete controlling radar front end 1 by radar terminal 9.Radar terminal 9 is connected to front controller 3 by LAN cable 6, and front controller 3 is forwarded to the command analysis of radar terminal other each parts again, controls each component working.After energising, front controller 3 control radar front end 1 each parts complete initialization, wait for the order of controlling of receiving radar terminal 9; Radar terminal 9 completes after initialization, waits for that operating personnel send radar work order.
As shown in Figure 1 b, front controller 3 sends control command by cable to frequency synthesizer, determines work wave and synchronous beat that radar front end adopts, to control other each component working; In addition, front controller 3 has also been controlled the transmitting power of transmitter.Frequency synthesizer provides transmitting coherent signal to transmitter, then by antenna feed, is gone out after being amplified by transmitter power.
Antenna is received radar echo, after low noise amplifier amplifies, deliver to the frequency mixer of receiver, the benchmark local oscillation signal mixing providing with frequency synthesizer, resulting zero intermediate frequency signals is again through amplification, characteristic filtering, the extraction of windowing, walk abreast and amplify by arrowband, A/D conversion, finally enters processing and extraction that digital signal processing module carries out echo signal.Synchronizing signal and sampled signal that digital signal processing module is required provide by frequency synthesizer.Gain, the frequency that front controller has been controlled receiver by cable windowed and extracted and the filtering of narrow band signal is processed and amplified.
Front controller 3 has also been controlled the mode of operation of digital signal processing module, the detection of realize target, tracking, identification.In addition front controller 3 also connects and is controlling rotating speed and the corner that drives The Cloud Terrace 4, obtains the real-time angle of antenna work.
2) radar video supervisory control system job description
As shown in Figure 2 a, radar video supervisory control system is comprised of radar monitoring system and video monitoring system.The video monitoring system here should be the video monitoring system of Adoption Network communication in principle.As shown in the figure, radar monitoring system itself can be independent of video monitoring system operation, between radar monitoring system and video monitoring system, by network cable, connects communication, and communication protocol adopts TCP/IP.
Radar monitoring system is comprised of the radar station as radar front end, radar terminal and the network switch and network service cable.Radar station can be a plurality of according to guarded region planning and configuration, and radar terminal only configures 1, and intrasystem radar station and radar terminal all should distribute suitable IP address, and radar terminal is realized IP by IP address and radar station and communicated by letter.
Between the CCTV camera of video monitoring system and monitoring host computer, by network cable, be connected, realize the transmission to the control of video camera and view data.In video monitoring system, every video camera is all assigned unique IP address, and monitoring host computer is controlled video camera by this address, and obtains realtime image data from video camera.
Described video monitoring system should have following functions: the calculating function that this system drive software is installed accesses this system in IP mode easily, and in the drive software appointing system that can provide by system, the real-time monitor data of this video camera is read in the IP address of certain video camera m, show on computers, and can be on computers to operations such as image amplify, dwindles, drags.At present, this has been the conventional func that many video monitoring systems are equipped with.
Described radar monitoring system is realized with the network of video monitoring system and is connected with IP and communicates by letter by network cable, on radar terminal, can carry out Long-distance Control to the video camera of appointment, and can will specify the real-time data collection of video camera to be sent to radar terminal, so that display-object on radar terminal, identification target.
The workflow of radar video supervisory control system is roughly as follows:
Suppose that radar station is installed to suitable position by the requirement of guarded region, the video camera of video monitoring is also installed to the position of regulation on request, and video camera has been provided with presetting bit to the key area of radar station monitoring.At radar terminal place, control radar station is powered up, allow radar station scanning work, on radar terminal, should be able to observe the scanning probe picture of each radar station.On radar terminal, should be able to control each radar station, scanning position, the scope of adjusting radar station arrive appointed area, and can amplify, dwindle, drag radar detection picture.Gain that can also control radar station on radar terminal and observe thresholding, to obtain the optimum efficiency that moving target is surveyed.
On described radar terminal, electronic chart is installed, can the moving target detecting is accurately located, be followed the tracks of, meanwhile, can also set zone of alarm according to key monitoring region.Once in motion target enters alarm region, on radar terminal, can produce sound and light alarm.
On radar terminal, find that there is moving target and enter key monitoring region, produce and report to the police, at this moment, operating personnel click (or being set to automatically) to this target on screen, just can dispatch suitable camera points and focus on this target place, target image is sent on the screen of radar terminal and shows, operating personnel just can judge whether what this target is actually, should take further defence measure.
Radar scanning data and the image on the screen of radar terminal, observed, the target image observed of scheduling video camera all can store on medium, is sent to upper management department, for decision-making in the time of simultaneously also can be by network implementation.
By above-mentioned radar video supervisory control system, to have given full play to the initiatively advantage of accurate detection discovery moving target of radar monitoring system, and networked with video monitoring system, scheduling picture pick-up device is enrolled target image in time, reaches the object of accurate identification target.And, can find simultaneously, follow the tracks of, identify a plurality of moving targets, therefore, can greatly promote the intelligent level of existing supervisory control system.
Fig. 2 b be radar monitoring system with video monitoring system between adopt radio communication to be connected schematic diagram.Wherein between two systems, adopt radio communication connection, other parts are identical with Fig. 2 a, and workflow is also the same.The wireless communication terminal is here a kind of radio communication terminal based on IP data communications, and this is the communication equipment of current existing use.The data of native system for single-channel communication, require the communication bandwidth of normal video transmission to be not less than 2Mb.If many video monitoring equipments are carried out to radar interlock, communication bandwidth must increase, the requirement transmitting to meet multi-channel video; At this moment, wireless communication preferably adopts special mobile communications network to realize, but control method between radar monitoring system and video monitoring equipment is basically identical with cable network situation.It is a kind of scheme of system group network more flexibly that radio communication connects, and is more suitable for the occasion that motion in the field uses.
Claims (9)
1. a radar video supervisory control system, is characterized in that, comprises a radar monitoring system and a video monitoring system;
Described radar monitoring system comprises one or some radar front ends and the radar terminal that is connected with radar front end;
Described video monitoring system comprises a monitoring host computer and one or some video cameras;
Described radar terminal is connected by wire/radio network with monitoring host computer.
2. radar video supervisory control system as claimed in claim 1, is characterized in that, also comprises a power supply module, in order to radar front end is powered, and is electrically connected to radar terminal by network.
3. radar video supervisory control system as claimed in claim 1, is characterized in that, described radar front end comprises that a detection main frame, a front controller, drive The Cloud Terrace and an electric power conversion apparatus; Electric power conversion apparatus is electrically connected to detection main frame, front controller and driving The Cloud Terrace; Drive The Cloud Terrace to support radar front end and drive radar front end to rotate.
4. radar video supervisory control system as claimed in claim 3, is characterized in that, described detection main frame comprises antenna, frequency synthesizer, transmitter, receiver and signal processor.
5. radar video supervisory control system as claimed in claim 4, is characterized in that, described frequency synthesizer is the frequency synthesizer of transmitting linear frequency modulation continuous wave.
6. radar video supervisory control system as claimed in claim 1, is characterized in that, described radar terminal is desktop computer or portable computer.
7. radar video supervisory control system as claimed in claim 1, it is characterized in that, described video monitoring system also comprises a video storage device and the some video stations being connected with monitoring host computer, and between three, data and control command transmit and all by network, realize, and communication protocol adopts ICP/IP protocol.
8. radar video supervisory control system as claimed in claim 1, is characterized in that, between described radar front end and radar terminal and between radar terminal and monitoring host computer, all can be connected by LAN cable.
9. a radar video supervisory control system, is characterized in that, comprises a radar monitoring system and a video monitoring system;
Described radar monitoring system comprises some radar front ends, a switch and a radar terminal, and described radar front end connects switch jointly, and described switch is connected with radar terminal;
Described video monitoring system comprises a monitoring host computer and a plurality of camera head;
Described radar terminal is connected by a wireless communication terminal with monitoring host computer.
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| CN201420380522.4U CN204013884U (en) | 2014-07-10 | 2014-07-10 | Radar video supervisory control system |
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| CN201420380522.4U CN204013884U (en) | 2014-07-10 | 2014-07-10 | Radar video supervisory control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376538A (en) * | 2015-12-08 | 2016-03-02 | 湖南纳雷科技有限公司 | Radar and video fused large-scale monitoring system and method |
| CN108627823A (en) * | 2017-03-15 | 2018-10-09 | 上海涵适电子科技有限公司 | Ground radar safety-protection system |
| CN108983221A (en) * | 2018-05-28 | 2018-12-11 | 成都雷通科技有限公司 | A kind of control system of security radar equipment |
| CN111856446A (en) * | 2020-05-22 | 2020-10-30 | 青岛若愚科技有限公司 | Network monitoring system based on millimeter wave radar and millimeter wave antenna array structure |
-
2014
- 2014-07-10 CN CN201420380522.4U patent/CN204013884U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376538A (en) * | 2015-12-08 | 2016-03-02 | 湖南纳雷科技有限公司 | Radar and video fused large-scale monitoring system and method |
| CN108627823A (en) * | 2017-03-15 | 2018-10-09 | 上海涵适电子科技有限公司 | Ground radar safety-protection system |
| CN108983221A (en) * | 2018-05-28 | 2018-12-11 | 成都雷通科技有限公司 | A kind of control system of security radar equipment |
| CN111856446A (en) * | 2020-05-22 | 2020-10-30 | 青岛若愚科技有限公司 | Network monitoring system based on millimeter wave radar and millimeter wave antenna array structure |
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Effective date of registration: 20190301 Address after: 100040 Beijing Shijingshan Lugu District Yicuiyuan 11, 7 gates Patentee after: Beijing Coral Garden Science and Technology Development Department Address before: Room 7-401, Building 11, Yicuiyuan, Lugu South Road, Shijingshan District, Beijing Patentee before: BEIJING HUAYUAN LINGJIN ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100040 Beijing Shijingshan Lugu District Yicuiyuan 11, 7 gates Patentee after: Beijing Junlian Tianzhong Technology Co.,Ltd. Address before: 100040 Beijing Shijingshan Lugu District Yicuiyuan 11, 7 gates Patentee before: Beijing Coral Garden Science and Technology Development Department |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |