CN210986251U - Positioning and tracking network camera - Google Patents
Positioning and tracking network camera Download PDFInfo
- Publication number
- CN210986251U CN210986251U CN201921132981.XU CN201921132981U CN210986251U CN 210986251 U CN210986251 U CN 210986251U CN 201921132981 U CN201921132981 U CN 201921132981U CN 210986251 U CN210986251 U CN 210986251U
- Authority
- CN
- China
- Prior art keywords
- bearing
- plate
- pitching
- horizontal
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 12
- 241001330002 Bambuseae Species 0.000 claims description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 12
- 239000011425 bamboo Substances 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 11
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Landscapes
- Studio Devices (AREA)
- Accessories Of Cameras (AREA)
Abstract
The utility model provides a location tracking network camera, include: the panoramic lens assembly is arranged on the bottom shell assembly, and the tracking lens assembly is arranged on the holder assembly. The utility model discloses carry out security protection control construction when educating the camera to reduce the construction degree of difficulty, engineering maintenance cost and reduced whole scheme cost.
Description
Technical Field
The utility model relates to a technical field of make a video recording, in particular to location tracking network camera.
Background
Along with the development of science and technology and the need of society, the government provides the concept of 'balanced education and integration', and the education construction becomes the key point of social development. Many obsolete equipment of school need be changed, and the recorded broadcast is given lessons and the security protection control is the key of school's transformation, and traditional school's classroom is transformed, carries out the security protection control construction when increasing education camera to increased the construction degree of difficulty, engineering maintenance cost and promoted whole scheme cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a location tracking network camera has increased the demand of security protection control again when accomplishing education camera transformation needs to the construction degree of difficulty, engineering maintenance cost and reduction whole scheme cost have been reduced.
In order to achieve the above object, the present invention provides the following technical solutions:
a position tracking network camera, comprising: the device comprises a tracking lens assembly 1, a holder assembly 2, a bottom shell assembly 3 and a panoramic lens 4, wherein the holder assembly 2 and the panoramic lens assembly 4 are installed on the bottom shell assembly 3, and the tracking lens assembly 1 is installed on the holder assembly 2.
Preferably, the tracking lens assembly 1 includes: zoom lens subassembly 15, frame 16, camera back frame 12 before the camera, decorate circle 17, camera tailboard 11, first pitch bearing fixing base 14 and well section of thick bamboo 13, it installs to decorate circle 17 before the camera on the frame 16, frame 16 installs before the camera well section of thick bamboo 13 front end, zoom lens subassembly 15 is installed well section of thick bamboo 13 is inside, camera back frame 12 is installed well section of thick bamboo 13 rear end, camera tailboard 11 is installed on the camera back frame 12.
Preferably, the head assembly 2 comprises: the middle shell 21, the supporting plate component 214, the first pitch bearing 22, the second pitch bearing 29, the first pitch bearing pressing plate 23, the second pitch bearing pressing plate 211, the pitch light coupling baffle 210, the pitch gear 24, the pitch gear baffle 25, the pitch synchronous belt 26, the first ear shell fixing plate 27, the second ear shell fixing plate 212, the first ear shell 28, the second ear shell 213 and the supporting plate component 214, wherein the second pitch fixing shaft is connected with the second pitch bearing 29, the pitch light coupler flap 210 is mounted behind the second pitch bearing 29, the second pitch bearing hold down 211 is mounted behind the pitch light coupler flap 210, the second earcup fixing plate 212 is installed behind the second pitch bearing pressure plate 211, the second earmuff 213 is installed behind the second earmuff fixing plate 212, and the holder assembly 2 is installed on the bottom case assembly 3 through the first earmuff fixing plate 27 and the second earmuff fixing plate 212.
Preferably, the tracking lens assembly 1 is mounted on the middle housing 21, the first pitch bearing 22 and the second pitch bearing 29 are mounted in a bearing hole of the middle housing 21, the first pitch fixing shaft is connected with the first pitch bearing 22, the first pitch bearing pressing plate 23 is mounted behind the first pitch bearing 22, the first pitch bearing 22 is fixed on the first pitch bearing fixing seat 14, the pitch gear 24 is mounted on the first pitch bearing fixing seat 14, behind the first pitch bearing 22, the pitch gear blocking plate 25 is mounted on the pitch gear 24, and the pitch gear 24 and the pitch timing belt 26 are connected to the vertical motor 2148 of the supporting plate assembly 214.
Preferably, the backup plate assembly 214 includes: the horizontal bearing pressing plate 2141, the horizontal synchronous belt 2142, the horizontal gear 2143, the horizontal bearing 2144, the horizontal bearing fixing seat 2145, the horizontal limiting optical coupler plate 2146, the supporting plate 2147, the vertical motor 2148 and the horizontal motor 2149, the horizontal bearing fixing seat 2145 is fixed on the supporting plate 2147, the horizontal bearing 2144 is embedded in the horizontal gear 2143, the horizontal bearing pressing plate 2141 is installed on the horizontal bearing fixing seat 2145, the horizontal synchronous belt 2142 is connected with the horizontal motor 2149, the vertical motor 2148 is connected with the pitching gear 24 through the pitching synchronous belt 26, and the supporting plate assembly is installed on the middle shell 21.
Preferably, the bottom shell assembly 3 comprises: the panoramic lens assembly comprises a CPU image processor main board 34, an interface board 33, a fixing plate 32, a shielding plate 39, an infrared receiving plate A37, an infrared receiving plate B38, a bottom plate 35 and a bottom shell 31, wherein a lens hole and an infrared receiving hole are formed in the front end of the bottom shell 31, the panoramic lens assembly 4, the infrared receiving plate A37 and the infrared receiving plate B38 are fixed on the bottom shell 31, the exposed part of the panoramic lens assembly 4 is shielded by installing the shielding plate 39, and the pan-tilt assembly 2 is fixed on the bottom shell 31 through the fixing plate 32.
Preferably, the panoramic lens assembly 4 includes: panorama high definition M12 camera lens 43, lens mount 42, sensor PCBA41 and panorama lens fixing base 44, panorama lens subassembly 4 is installed bottom shell 31 the place ahead middle part to the place ahead middle part bottom shell trompil with infrared receiver board A37 the infrared remote control receiver board B38 trompil is on a horizontal line, shielding plate 39 is used for sheltering from the exposed part of panorama lens trompil and remote control receiver board trompil, shielding plate 39 trompil exposes the panorama lens.
Through implementing above technical scheme, have following technological effect: the utility model provides a location tracking web camera, tracking camera are used for tracking and shoot mr or student, and panoramic camera is used for the algorithm location, confirms mr or student, has solved the difficult point that current education tracking camera and security protection control can not combine, has accomplished a tractor serves several purposes to construction degree of difficulty, engineering maintenance cost and reduction whole scheme cost have been reduced.
Drawings
Fig. 1 is a schematic structural diagram of a positioning and tracking network camera provided by the present invention;
fig. 2 is a schematic structural diagram of the tracking lens assembly provided by the present invention;
fig. 3 is a schematic structural view of the pan/tilt head assembly provided by the present invention;
fig. 4 is a schematic structural view of the bottom case assembly provided by the present invention;
fig. 5 is a schematic structural view of the panoramic lens assembly provided by the present invention;
fig. 6 is a schematic structural diagram of a support plate assembly provided in the present application.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed description of the embodiments provided in the present invention is provided with reference to the accompanying drawings.
The utility model provides a high definition location tracking network camera, as shown in attached figure 1-5, including tracking lens subassembly 1, cloud platform subassembly 2, drain pan subassembly 3, panoramic lens subassembly 4, cloud platform subassembly 2 and panoramic lens subassembly 4 install on drain pan subassembly 3, and tracking lens subassembly 1 installs on cloud platform subassembly 2. In this embodiment, tracking lens subassembly 1 is installed on cloud platform subassembly 2, under cloud platform subassembly 2's effect, makes tracking lens can rotate from top to bottom and left and right sides to realize tracking and shoot mr and student's purpose, solved the difficult point that current education tracking camera and security protection control can not combine, thereby reduced the construction degree of difficulty, engineering maintenance cost and reduced whole scheme cost.
On the basis of the foregoing embodiments, in other embodiments, further, the tracking lens assembly 1 includes: zoom lens subassembly 15, frame 16, camera back frame 12 before the camera, decorate circle 17, camera tailboard 11, first pitch bearing fixing base 14 and well section of thick bamboo 13, it installs to decorate circle 17 before the camera on the frame 16, frame 16 installs before the camera well section of thick bamboo 13 front end, zoom lens subassembly 15 is installed well section of thick bamboo 13 is inside, camera back frame 12 is installed well section of thick bamboo 13 rear end, camera tailboard 11 is installed on the camera back frame 12. In the present embodiment, the tracking lens assembly 1 is mainly used to track the state of a shooting teacher lecture or a student answering a question.
On the basis of the foregoing embodiments, in other embodiments, the pan/tilt head assembly 2 further includes: middle-shell 21, support frame subassembly 214, first pitch bearing 22, second pitch bearing 29, first pitch bearing clamp plate 23, second pitch bearing clamp plate 211, every single move opto-coupler separation blade 210, every single move gear 24, every single move gear separation blade 25, every single move hold-in range 26, first earlap fixed plate 27, second earlap fixed plate 212, first earlap 28, second earlap 213 and support plate subassembly 214, the second every single move the fixed axle with second pitch bearing 29 is connected, every single move opto-coupler separation blade 210 is installed second pitch bearing 29 is at the back, second pitch bearing clamp plate 211 is installed every single move opto-coupler separation blade 210 is at the back. In this embodiment, preferably, the second earcup fixing plate 212 is installed behind the second pitch bearing pressing plate 211, the second earcup 213 is installed behind the second earcup fixing plate 212, and the head module 2 is installed on the bottom shell 3 through the first earcup fixing plate 27 and the second earcup fixing plate 212.
On the basis of the above embodiments, in other embodiments, further, the tracking lens assembly 1 is mounted on the middle shell 21, the first pitch bearing 22 and the second pitch bearing 29 are mounted in the bearing hole of the middle shell 21, the first pitch fixing shaft is connected to the first pitch bearing 22, and the first pitch bearing pressing plate 23 is mounted behind the first pitch bearing 22, so as to fix the first pitch bearing 22 on the first pitch bearing fixing seat 14. In this embodiment, preferably, the pitch gear 24 is mounted on the first pitch bearing fixing seat 14, the pitch gear catch 25 is mounted on the pitch gear 24 behind the first pitch bearing 22, the pitch gear 24 and the pitch synchronous belt 26 are connected to the vertical motor 2148 of the supporting plate assembly 214, and the tracking lens can be driven to rotate up and down by the vertical motor 2148, so that the tracking lens can rotate up and down, a tracking teacher or a student shoots, and the length of the first pitch bearing fixing seat 14 of the tracking lens assembly 1 is long.
On the basis of the above embodiments, in other embodiments, further, the supporting plate assembly 214 includes: horizontal bearing pressing sheets 2141, horizontal synchronous belts 2142, horizontal gears 2143, horizontal bearings 2144, horizontal bearing fixing seats 2145, horizontal limiting optical coupling plates 2146, supporting plates 2147, vertical motors 2148 and horizontal motors 2149. In this embodiment, preferably, the horizontal bearing fixing seat 2145 is fixed to the supporting plate 2147, the horizontal bearing 2144 is embedded in the horizontal gear 2143, the horizontal bearing pressing sheet 2141 is mounted on the horizontal bearing fixing seat 2145, the horizontal synchronous belt 2142 is connected to the horizontal motor 2149, the vertical motor 2148 is connected to the pitch gear 24 through the pitch synchronous belt 26, the supporting plate assembly is mounted on the middle housing 21, and the middle housing 21 is driven by the horizontal motor 2148 to rotate, so that the tracking lens assembly 1 is driven to rotate left and right, and the tracking lens can rotate horizontally, thereby achieving the effect of tracking and shooting the teacher lectures or the students to answer questions in the horizontal direction.
On the basis of the above embodiments, in other embodiments, further, the bottom case assembly 3 includes: a CPU image processor mainboard 34, an interface board 33, a fixing plate 32, a shielding plate 39, an infrared receiving plate A37, an infrared receiving plate B38, a bottom plate 35 and a bottom shell 31, in this embodiment, preferably, the front end of the bottom shell 3 has a lens hole and an infrared receiving hole, the panoramic lens assembly 4, the infrared receiving plate A37 and the infrared receiving plate B38 are fixed on the bottom shell 3, and can transmit the image shot by the whole lens assembly 4 to the CPU image processor mainboard 34, the CPU image processor mainboard 34 sends an instruction to the pan-tilt assembly 2 and the tracking lens assembly 1 according to the set parameter values, locks the target position, and the tracking lens assembly 1 enlarges the image to a proper size, the panoramic lens assembly 4 transmits the image to the CPU image processor mainboard 34 in real time, the purpose of tracking the target in real time is realized, the exposed part of the panoramic lens assembly 4 is shielded by installing the shielding plate 39, the holder assembly 2 is fixed to the bottom case 3 by the fixing plate 32.
On the basis of the foregoing embodiments, in other embodiments, further, the panoramic lens assembly 4 includes: panorama high definition M12 lens 43, lens mount 42, sensor PCBA41 and panorama lens fixing base 44. In this embodiment, preferably, the panoramic lens assembly 4 is mounted at the front middle part of the bottom case 3, and the front central bottom case opening and the infrared receiving panel a37 and the infrared receiving B panel 38 opening are on a horizontal line, the shielding plate 39 is used to shield the exposed portions of the panoramic lens opening and the remote control receiver plate opening, the shielding plate 39 is provided with a hole to expose the panoramic lens, the panoramic camera component captures images, the images are sent to the CPU image processing main board for analysis and calculation, whether the shooting target is a student or a teacher is determined, the calculation result is sent to the pan head component and the tracking lens component, the pan head component and the tracking lens component track the teaching state of the teacher on the lecture platform, or the close-up when the student asks questions in class is tracked, the image shot by the tracking lens component is output to the recording and broadcasting host computer through the SDI interface, and simultaneously, videos shot by the tracking lens assembly and the panoramic lens assembly are transmitted to a monitoring center through a network to be stored. The positioning and tracking network camera supports various standard protocols and private video streaming protocols of manufacturers such as Haikang, Dahua and the like, and images shot by the panoramic lens and the tracking lens can be accessed into NVRs of the manufacturers such as Haikang, Dahua, Xiongmai and the like to store videos.
The utility model discloses avoided, when traditional classroom of school transformed, still need carry out the shortcoming of security protection control construction when increasing education camera, this patent increased the demand of security protection control again when having accomplished the transformation needs of education camera, combined together education camera and security protection control to reduce the construction degree of difficulty, engineering maintenance cost and reduced whole scheme cost.
It introduces in detail above the embodiment of the present invention provides a location tracking network camera, to the general technical personnel in this field, according to the embodiment of the present invention, there is a change part on the concrete implementation and application scope, to sum up, this description content should not be understood as being right the utility model discloses a restriction.
Claims (7)
1. A position tracking network camera, comprising: track lens subassembly (1), cloud platform subassembly (2), drain pan subassembly (3) and panoramic lens subassembly (4), cloud platform subassembly (2) with panoramic lens subassembly (4) are installed on drain pan subassembly (3), track lens subassembly (1) is installed on cloud platform subassembly (2).
2. The position tracking network camera according to claim 1, wherein the tracking lens assembly (1) comprises: zoom lens subassembly (15), frame (16), camera after-frame (12), dress circle (17), camera tailboard (11), a first pitch bearing fixing base (14) and well section of thick bamboo (13) before the camera, dress circle (17) is installed before the camera on-frame (16), install before the camera frame (16) well section of thick bamboo (13) front end, install zoom lens subassembly (15) well section of thick bamboo (13) inside, install camera after-frame (12) well section of thick bamboo (13) rear end, install camera tailboard (11) on camera after-frame (12).
3. The position tracking webcam according to claim 1, characterized in that the pan-tilt assembly (2) comprises: a middle shell (21), a supporting plate component (214), a first pitching bearing (22), a second pitching bearing (29), a first pitching bearing pressing plate (23), a second pitching bearing pressing plate (211), a pitching optocoupler baffle (210), a pitching gear (24), a pitching gear baffle (25), a pitching synchronous belt (26), a first ear shell fixing plate (27), a second ear shell fixing plate (212), a first ear shell (28), a second ear shell (213) and a supporting plate component (214), wherein a second pitching fixing shaft is connected with the second pitching bearing (29), the pitching optocoupler baffle (210) is installed behind the second pitching bearing (29), the second pitching bearing pressing plate (211) is installed behind the pitching optocoupler baffle (210), the second ear shell fixing plate (212) is installed behind the second pitching bearing pressing plate (211), and the second ear shell (213) is installed behind the second ear shell fixing plate (212), the cloud platform subassembly (2) pass through first earlap fixed plate (27) with second earlap fixed plate (212) is installed on drain pan subassembly (3).
4. The position tracking web camera according to claim 3, characterized in that the tracking lens assembly (1) is mounted on the center housing (21), the first pitch bearing (22) and the second pitch bearing (29) are mounted in bearing holes of a middle shell (21), the first pitching fixing shaft is connected with the first pitching bearing (22), the first pitching bearing pressure plate (23) is arranged behind the first pitching bearing (22) to fix the first pitching bearing (22) on the first pitching bearing fixing seat (14), the pitch gear (24) is mounted on the first pitch bearing mount (14), behind the first pitch bearing (22), the pitch gear flap (25) is mounted on the pitch gear (24), the pitch gear (24) and pitch timing belt (26) are connected to a vertical motor (2148) of the back plate assembly (214).
5. The position tracking webcam of claim 4, wherein the bearing plate assembly (214) comprises: horizontal axis bearing piece (2141), horizontal synchronous belt (2142), horizontal gear (2143), horizontal bearing (2144), horizontal bearing fixing base (2145), horizontal spacing opto-coupler board (2146), backup pad (2147), perpendicular motor (2148) and horizontal motor (2149), horizontal bearing fixing base (2145) is fixed in backup pad (2147), horizontal bearing (2144) imbeds in horizontal gear (2143), and will horizontal axis bearing piece (2141) is installed on horizontal bearing fixing base (2145), horizontal synchronous belt (2142) with horizontal motor (2149) are connected, perpendicular motor (2148) passes through every single move hold area (26) with every single move gear (24) are connected, the backup pad subassembly is installed on mesochite (21).
6. The position tracking webcam according to claim 1, characterized in that said bottom shell assembly (3) comprises: the panoramic lens assembly comprises a CPU image processor main board (34), an interface board (33), a fixing plate (32), a shielding plate (39), an infrared receiving plate A (37), an infrared receiving plate B (38), a bottom plate (35) and a bottom shell (31), wherein a lens hole and an infrared receiving hole are formed in the front end of the bottom shell (31), the panoramic lens assembly (4), the infrared receiving plate A (37) and the infrared receiving plate B (38) are fixed on the bottom shell (31), the exposed part of the panoramic lens assembly (4) is shielded through the mounting shielding plate (39), and the holder assembly (2) is fixed on the bottom shell (31) through the fixing plate (32).
7. The position tracking network camera according to claim 6, wherein the panoramic lens assembly (4) comprises: panorama high definition M12 camera lens (43), lens mount (42), sensor PCBA (41) and panorama lens fixing base (44), install panorama lens subassembly (4) drain pan (31) the place ahead middle part to the place ahead middle part drain pan trompil with infrared receiver panel A (37) infrared receiver panel B (38) trompil is on a horizontal line, shielding plate (39) are used for sheltering from the exposed part of panorama lens trompil and remote control receiver panel trompil, shielding plate (39) trompil exposes panorama lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921132981.XU CN210986251U (en) | 2019-07-18 | 2019-07-18 | Positioning and tracking network camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921132981.XU CN210986251U (en) | 2019-07-18 | 2019-07-18 | Positioning and tracking network camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210986251U true CN210986251U (en) | 2020-07-10 |
Family
ID=71460430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921132981.XU Expired - Fee Related CN210986251U (en) | 2019-07-18 | 2019-07-18 | Positioning and tracking network camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210986251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267014A (en) * | 2019-07-18 | 2019-09-20 | 深圳市浪涛科技有限公司 | A kind of locating and tracking web camera |
-
2019
- 2019-07-18 CN CN201921132981.XU patent/CN210986251U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267014A (en) * | 2019-07-18 | 2019-09-20 | 深圳市浪涛科技有限公司 | A kind of locating and tracking web camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1479525B (en) | System and method for capturing audio and video frequency data | |
| WO2011049353A2 (en) | System and method for providing electronic learning content | |
| CN106254781B (en) | Full-automatic recorded broadcast and live broadcast all-in-one machine based on three cameras | |
| US20020075295A1 (en) | Telepresence using panoramic imaging and directional sound | |
| CN206237504U (en) | A kind of intelligent tutoring tracking camera | |
| RU2011130860A (en) | REMOTE PRESENCE SYSTEM, REMOTE PRESENCE METHOD AND VIDEO DATA COLLECTION DEVICE | |
| US2934601A (en) | Closed circuit television system and method of operation | |
| CN210578944U (en) | Panorama non-blind area watch-dog | |
| CN210986251U (en) | Positioning and tracking network camera | |
| CN105744132A (en) | Optical lens accessory for shooting panoramic image | |
| CN107734212A (en) | A kind of automatic recorded broadcast director system | |
| CN108961880A (en) | A kind of implementation method contacting classroom | |
| CN110933350A (en) | Electronic cloud mirror recording and broadcasting system, method and device | |
| CN111756993A (en) | VR (virtual reality) sound and video simultaneous recording method for tourism live-action | |
| CN111984065A (en) | Big data interactive teaching practical training platform | |
| CN111163252A (en) | Panoramic shooting device, panoramic shooting system, shooting method and aircraft | |
| CN213461928U (en) | Panoramic camera and electronic device | |
| CN211785807U (en) | Automatic observation system for double shooting of lightning channel | |
| CN110267014A (en) | A kind of locating and tracking web camera | |
| CN209103567U (en) | A kind of connection classroom system | |
| CN111597916A (en) | Concentration degree detection method, terminal device and system | |
| CN209343559U (en) | A kind of connection classroom system | |
| CN214795526U (en) | Video conference system device | |
| CN215643184U (en) | Virtual classroom system | |
| CN210865168U (en) | Intelligent teaching machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200710 |