CN205430620U - Wireless scene equipment - Google Patents
Wireless scene equipment Download PDFInfo
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- CN205430620U CN205430620U CN201620230983.2U CN201620230983U CN205430620U CN 205430620 U CN205430620 U CN 205430620U CN 201620230983 U CN201620230983 U CN 201620230983U CN 205430620 U CN205430620 U CN 205430620U
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Abstract
The utility model discloses technical scheme discloses a wireless scene equipment and wireless location method, wireless scene equipment includes: induction antenna, response recognition cell and the control unit wherein, work as the location in the toy entering scene that has identity induction element, the response recognition cell be used for reading the authentication information of toy, location is in the response within range of induction antenna, authentication information is including the information that is used for sign toy identity, the control unit is used for acquireing the authentication information that response recognition cell read is with the sureness the identity and the positional information of toy. Wireless scene equipment and wireless location method can fast, accurately realize the location of toy in the scene, and do not receive the influence of scene environment.
Description
Technical field
This utility model belongs to toy field of locating technology, is specifically related to a kind of wireless scene equipment and wireless location method.
Background technology
The sports at the places such as traditional mobile type toy such as tank, battlebus, racing car or scene of game are to constitute by building map, sand table, racing track etc., and toy completes the realization of various attitude in scene, sports to each other.Toy location mode in the scene generally has following three kinds:
Color sensor+coloured paper location.Toy self, equipped with color sensor, arranges different colours paster, the positional information that toy storage color is corresponding in scene.When toy is captured and call, by the color sensor of toy, the positional information that storage color is corresponding before through the color of scene, it is achieved thereby that the location that toy is in scene.This location mode updates, after requiring User Defined paster position, the positional information that toy self paster is corresponding, lack flexibly and conveniently property, and owing to paster color aberration can occur along with environment and time change, cause the reduction of toy inspection degree of accuracy, so whole process needs manual intervention, higher to environmental requirement.
Camera image identification positions.Toy self, equipped with photographic head, is disposed with shadow or the image of specific rule in scene, and video that toy is arrived by camera collection or image information, comparison map data base realizes toy location in scene.This location mode requires that user can generate map data base according to different scenes, the technology of application person is required higher, and due to illumination brightness differentia influence, the reliability causing toy photographic head sampled images can reduce, so whole process needs complicated early stage map datum planning, ambient lighting is required higher.
Intensity algorithm based on received signal strength indicator (RSSI, ReceivedSignalStrengthIndication) positions.Toy self is with RF transceiver, can be WLAN (Wi-Fi, WirelessFidelity), bluetooth (Bluetooth), purple honeybee (ZigBee), radio frequency (RF, the consensus standard such as RadioFrequency), and in scene, arrange a number of beacon (Beacon) signal transceiver.Toy can be by reading the intensity of different Beacon signals in scene, and the location algorithm or wireless signal fingerprint base by similar base station draws position.This location mode require user can appropriate design Beacon signal transceiver putting position in scene map, and received signals fingerprint storehouse can be gathered could realize location, and because multipath effect during radio frequency signal propagation causes indoor position accuracy relatively low.
Utility model content
Technical solutions of the utility model to solve the technical problem that being that existing toy location mode in the scene requires height to scene environment, and positioning precision is low.
For solving above-mentioned technical problem, technical solutions of the utility model provide a kind of wireless scene equipment, including: induction antenna, sensing recognition unit and control unit, wherein, when the toy with identity sensing unit enters the specific region in scene, described sensing recognition unit is for reading the authentication information of described toy, and described specific region is in the induction range of described induction antenna, and described authentication information includes the information for identifying toy identity；Described control unit is for obtaining the authentication information that described sensing recognition unit reads, to determine the positional information of described toy.
Optionally, described wireless scene equipment includes multiple induction antenna, the induction range of each induction antenna is different, and described control unit determines identity and the positional information of described toy for the induction range of the authentication information read according to described sensing recognition unit and induction antenna.
Optionally, described control unit is additionally operable to send to manipulation end identity and the positional information of described toy.
Optionally, described control unit is additionally operable to obtain the feedback information of described manipulation end.
Optionally, described wireless scene equipment also includes that radio communication unit, described control unit and manipulation end transmit information by described radio communication unit.
Optionally, described radio communication unit uses bluetooth, Wi-Fi, radio frequency or ZigBee mechanics of communication.
Optionally, described control unit is additionally operable to the identity according to described toy and positional information performs light efficiency and/or sound effect controls operation.
Optionally, described control unit is additionally operable to control described sensing recognition unit and the identity sensing unit of described toy is performed write operation.
Optionally, described induction antenna is RFID antenna, and described sensing recognition unit is rfid interrogator, and described identity sensing unit is RFID label tag.
Optionally, described induction antenna is NFC antenna, and described sensing recognition unit is NFC module, and described identity sensing unit is NFC module.
For solving above-mentioned technical problem, technical solutions of the utility model also provide for a kind of wireless location method, including: when the toy with identity sensing unit enters the specific region in scene, the authentication information of described toy is read by sensing recognition unit, described specific region is in the induction range of induction antenna, and described authentication information includes the information for identifying toy identity；Obtain the authentication information that described rfid interrogator reads, to determine identity and the positional information of described toy.
Optionally, being disposed with multiple induction antenna in described scene, the induction range of each induction antenna is different；The described identity determining described toy and positional information include: the authentication information read according to described sensing recognition unit and the induction range of induction antenna determine identity and the positional information of described toy.
Optionally, described wireless location method also includes: send identity and the positional information of described toy to manipulation end.
Optionally, described wireless location method also includes: obtain the feedback information of described manipulation end.
Optionally, bluetooth, Wi-Fi, radio frequency or ZigBee mechanics of communication is used to transmit information with described manipulation end.
Optionally, described wireless location method also includes: identity and positional information according to described toy perform light efficiency and/or sound effect controls operation.
Optionally, described wireless location method also includes: control described sensing recognition unit and the identity sensing unit of described toy is performed write operation.
Optionally, described induction antenna is RFID antenna, and described sensing recognition unit is rfid interrogator, and described identity sensing unit is RFID label tag.
Optionally, described induction antenna is NFC antenna, and described sensing recognition unit is NFC module, and described identity sensing unit is NFC module.
Compared with prior art, technical solutions of the utility model apply wireless induction identification technology, induction antenna can be exemplary flexibly deployable in scene, when the induction range of the toy entrance induction antenna with identity sensing unit just can accurately be identified and position, induction antenna and sensing recognition unit may operate under adverse circumstances, it is not affected by the surrounding environment, also can recognize that the toy of high-speed mobile, therefore technical solutions of the utility model have fixation and recognition precision height, and the advantage low to the requirement of scene environment.
Further, technical solutions of the utility model use multiple antenna design, multiple induction antennas can be with flexible arrangement diverse location in scene, the induction range utilizing different antennae realizes multizone location, and each region can identify and position multiple toy, therefore technical solutions of the utility model have the advantage that extensibility is strong.
Further, identity and the positional information of toy are uploaded to manipulation end by wireless communication technique by technical solutions of the utility model, process in real time and feed back for manipulation end, to manipulate toy for greater flexibility, it is achieved thereby that the association of toy, manipulation end and scene and the most mutual.
Accompanying drawing explanation
Fig. 1 is the structural representation of the wireless scene equipment of technical solutions of the utility model；
Fig. 2 is the structural representation of the wireless scene equipment of this utility model embodiment；
Fig. 3 is the structural representation of the wireless scene equipment of another embodiment of this utility model.
Detailed description of the invention
The wireless scene equipment of technical solutions of the utility model is realized the identification of toy by wireless induction identification technology and is accurately positioned, as shown in Figure 1, described wireless scene equipment includes: induction antenna is (single or multiple, figure exemplarily gives four, i.e. T1, T2, T3, T4), sensing recognition unit M2 and control unit M1, wherein, when the toy N0 with identity sensing unit N1 enters the specific region in scene M0, sensing recognition unit M2 is for the authentication information of reading toy N0, and described specific region is in the induction range of described induction antenna；Control unit M1 is for obtaining the authentication information that sensing recognition unit M2 reads, to determine identity and the positional information of toy N0.Described authentication information includes the information for identifying toy identity.
Described wireless induction identification technology can be radio frequency identification (RFID, RadioFrequencyIdentification) technology, specifically, described induction antenna uses RFID antenna, described sensing recognition unit uses rfid interrogator, and described identity sensing unit uses RFID label tag.RFID technique is a kind of non contact angle measurement, and feature is safety, quickly with not by such environmental effects.
Described wireless induction identification technology can also be near-field communication (NFC, NearFieldCommunication) technology, specifically, described induction antenna is NFC antenna, described sensing recognition unit is NFC module, and described identity sensing unit is NFC module.NFC technique is to be developed by RFID technique, adds the function that data double-way transmits, applies the most flexible.
As a example by RFID, technical solutions of the utility model are described in detail below.
The wireless scene equipment of this utility model embodiment refer to Fig. 2, including: control unit A1, rfid interrogator A2, RFID antenna R1, R2, R3 and R4, wherein, when the toy B1 with RFID label tag (Tag) enters the specific region in scenario A 0, rfid interrogator A2 is for the authentication information of reading toy B1, and described specific region is in the induction range of described RFID antenna；Control unit A1 is for obtaining the authentication information that rfid interrogator A2 reads, to determine identity and the positional information of toy B1.
Specifically, RFID antenna can be previously placed at a certain position in scenario A 0, RFID antenna has certain induction range, can also delimit specific region further in the induction range of RFID antenna in advance, and the scope of specific region can be less than or equal to the induction range of RFID antenna.Rfid interrogator A2 sends the radiofrequency signal of certain frequency by RFID antenna, when the toy B1 with RFID label tag enters specific region, such as it is arranged on the specific region in the induction range of RFID antenna R3 shown in Fig. 2, then can produce faradic current, obtain energy with the toy B1 of Tag and be activated；Authentication information in label is sent by toy B1 by the built-in transmission antenna of Tag, and described authentication information includes the coding information of described label；RFID antenna receives and sends, from toy B1, the carrier signal of coming, and is sent to rfid interrogator A2 through antenna adjustments device；The authentication information of rfid interrogator A2 reading toy, is demodulated and decoding is then delivered to control unit A1 including to the signal received.
Control unit A1 obtains the authentication information that rfid interrogator A2 reads, to determine identity and the positional information of toy B1.Owing to the position of RFID antenna is arranged in advance, its induction range also is able to determine, after control unit A1 gets the authentication information that rfid interrogator A2 reads, it is assured that the toy B1 sending this authentication information enters the specific region (in the induction range of RFID antenna) pre-set in scenario A 0, has also determined that toy B1 positional information in scene A0.Control unit A1 generally can use microcontroller (MCU).
Control unit A1 can be also used for the identity according to described toy and positional information, performs correspondingly predetermined registration operation, such as, in scene A0, perform light efficiency and/or sound effect controls operation；Or, control described rfid interrogator A2 and the RFID label tag of toy B1 performed write operation.
RFID label tag in toy B1 is except sending the coding information of self, it is also possible to sends the status information of toy, such as, can include information about power, toy current operating conditions etc..Control unit A1 can be also used for the status information according to toy B1, or combining position information and status information perform correspondingly predetermined registration operation.
RFID label tag has the unique ID in a whole world (UID), after control unit A1 obtains authentication information, the legitimacy of label first can be judged according to the coding (UID) of label, to guarantee to identify the identity of toy, validity judgement generally can use the logical operations such as the CRC check of data transmission procedure, ID coding rule verification.
It addition, as in figure 2 it is shown, the wireless scene equipment of the present embodiment can also include LED L0, control unit A1 controls LED effect, the instruction for tag recognition confirms.
Further, wireless scene equipment can include multiple RFID antenna, and the induction range of each RFID antenna is different, and control unit A1 determines identity and the positional information of toy for the induction range of the authentication information read according to rfid interrogator A2 and RFID antenna.
The quantity of RFID antenna and position can determine according to actual design demand, in the present embodiment, as a example by 4 RFID antenna, it is arranged in the diverse location in scenario A 0, correspondingly, each RFID antenna has different induction ranges, RFID antenna R1 as shown in Figure 2, R2, R3 and R4, can delimit specific region respectively further in RFID antenna R1, R2, R3 and R4 induction range.4 RFID antenna send radiofrequency signal in turn, rfid interrogator A2 detects whether that toy enters the induction range of current RFID antenna, if had, rfid interrogator A2 is sent to control unit A1 after reading the authentication information that toy sends, uniqueness due to RFID label tag, therefore according to the identification information of authentication information and current RFID antenna, control unit A1 just can determine which toy enters which specific region, namely determine toy positional information in the scene, this positional information includes the authentication information of toy and the identification information of RFID antenna, the RFID antenna that the identification information of RFID antenna is different in identification system, it can be such as the numbering etc. of RFID antenna.
RFID antenna is exemplary flexibly deployable in scene, when the induction range entering RFID antenna with the toy of RFID label tag just can accurately be identified and position, RFID antenna and rfid interrogator may operate under adverse circumstances, it is not affected by the surrounding environment, also can recognize that the toy of high-speed mobile, therefore fixation and recognition precision is high, and the requirement to scene environment is low.
Using RFID multiple antenna design, multiple RFID antenna can utilize the induction range of different antennae to realize multizone location with flexible arrangement diverse location in scene, and each region can identify and position multiple toy, and therefore extensibility is strong.
The control unit of wireless scene equipment can also be further used for sending to manipulation end identity and the positional information of described toy.Information can be carried out by wired or wireless mode mutual between control unit and manipulation end.Refer to Fig. 3, the wireless scene equipment of another embodiment of this utility model includes: control unit A1, rfid interrogator A2, RFID antenna R1, R2, R3 and R4, also includes radio communication unit A3.Control unit A1 of the wireless scene equipment of the present embodiment can also transmit information by radio communication unit A3 with manipulation end B2.
Specifically, control unit A1 is after the identity determining toy B1 and positional information, it is also possible to identity and the positional information of toy B1 are sent to manipulation end B2 by radio communication unit A3.Manipulation end B2 is corresponding with toy B1, for manipulating toy B1, after manipulation end B2 receives identity and the positional information of toy B1, can carry out correspondingly data and process, produces corresponding feedback information and sent to control unit A1 by radio communication unit A3.After control unit A1 obtains the feedback information of manipulation end B2, do and correspondingly process, to realize the control to scenario A 0.
Radio communication unit A3 can use the mechanicss of communication such as bluetooth (Bluetooth), radio frequency, Wi-Fi, ZigBee.Manipulation end B2 can be the electric terminals such as mobile phone, game paddle, panel computer, palm PC, and manipulation end B2 can directly manipulate toy B1.
By wireless communication technique, identity and the positional information of toy are uploaded to manipulation end, process in real time for manipulation end and feed back, to manipulate toy for greater flexibility, it is achieved thereby that the association of toy, manipulation end and scene and the most mutual.
RFID technique and wireless communication technique is used to combine, automatically the toy identified by radiofrequency signal and position in scene of game, and carry out Real Data Exchangs by wireless telecommunications and manipulation end, it is achieved that quickly location and data interaction, and process is without manual intervention, automaticity is high.
The workflow of the present embodiment wireless scene equipment can be exemplified below:
Current RFID antenna constantly sends radiofrequency signal, detects whether to enter specific region with the toy of RFID label tag, and this specific region is in the induction range of current RFID antenna；
Anti-collision detects: if there being multiple toy to simultaneously enter the induction range of the same antenna, the radiofrequency signal of RFID antenna all can be responded by the RFID label tag in each toy, control unit carries out validity judgement by anti-collision algorithm, detects the UID of all toy labels；
Card selection: according to the UID read, activates label；Certification: according to default key, completes communication certification；Card Reader: the sector specified in inquiry tag and block, reads data；Dormancy: complete tag reader, the information that caching reads, dormancy label；If there being multiple toy to enter specific region, repeating card selection, certification, Card Reader, dormancy flow process, reading the information of other label；
The next RFID antenna of switching, repeats above-mentioned flow process, and, the follow-up flow process of parallel processing: cache information is uploaded to manipulation end by radio communication unit by control unit；Result that control unit is fed back according to manipulation end and instruction, perform subsequent response.
In the present embodiment, the process that control unit is done specifically may include that data prediction, data buffer storage and Man Machine Interface are shown.Data prediction includes validity judgement, detects the UID of label, rejects the invalid data not meeting ID coding rule.Data buffer storage includes that the information by toy sends is stored in the buffer queue of control unit, and wait is wirelessly transferred, and deletes after end of transmission from buffer queue.Man Machine Interface show include making a sound according to logic of propositions, light effect is shown, different scene location can preset different sound and light programs.Logic of propositions can be configured beforehand through manipulation end, for example:
During many people (multimachine) control the battle of many toys, some anchor points (preset in specific region or specific region) are designed as healing pattern, then its light efficiency is designed as green, and after in game process, control unit gets the information of toy location, green flashes.Can be designed as adding the pattern of attack by the anchor point having again, then its light efficiency is designed as redness, and after getting the information of toy location in game process, red light flashes.
Control in single doll-play procedure at single (unit), some anchor point can separately design sets foot-point (the similar game beating suslik) for timing, in game process, control unit regularly or at random by sound and light program prompting this anchor point of user is activated, user needs to move on anchor point by manipulation end by toy, after control unit gets the information of toy location, it is provided that polychrome transform effect.
Control unit is uploaded to the information of manipulation end by radio communication unit and may include that the status information (as manipulation end has request) of the positional information of toy, toy；Can also include: the identification information (such as self numbering etc.) of control unit, the status information (as manipulation end has request) of control unit.The positional information of toy may include that the authentication information of toy, the identification information of RFID antenna, the precoding preset when manipulation end accesses according to wireless scene equipment putting position in the scene.The status information of control unit can include that sound and light program display state, toy carry out the flow state etc. played.
The data processed result that control unit is fed back according to manipulation end and the subsequent response that instruction can perform include: be turned on and off RFID antenna and read write line, control the switch of positioning function；According to the game flow of toy, feed back to the sound and light program that user is different；In the RFID label tag of toy, write data, must have the game data (such as Role Information) etc. cached for a long time in an rfid tag required for the ephemeral data (the game application such as stepping on Rhizoma Anemones flaccidae etc must have sequencing) of sequencing, game flow including game flow.
In an application example, the high integration non-contact reader chip that rfid interrogator uses operating frequency to be 13.56MHz, this chip support meets the non-contact read-write pattern of ISO/IEC14443TypeA/MIFAREONE agreement.As a example by using MIFAREONE agreement to realize whole read-write process, RFID label tag uses the label that MIFARES50 is customized.RFID antenna uses enamel covered wire coiling to reach preferable resonant frequency, achieves the transmitting-receiving of maximal efficiency with minimum power consumption.Control unit uses microcontroller, radio communication unit uses bluetooth transceiver, bluetooth transceiver and microcontroller can integrate, such as can be realized by the CC2541 of TI, CC2541 is real sheet loading system (SoC) solution of a power optimization applied for low energy consumption and privately owned 2.4GHz, both complete the data interaction of RFID, complete again the data communication of bluetooth.
In this utility model embodiment, RFID label tag can use passive label, it would however also be possible to employ active tag, and active tag itself has internal electric source supply, in order to power supply needed for supplying internal IC to produce external signal.In general, active tag has longer reading distance and bigger memory capacity can be used to store some additional informations that read write line is transmitted.
The operating frequency of RFID antenna can use high-frequency mode, such as 13.56MHz；Can be to use low frequency and hyperfrequency mode, low frequency operating frequency can be from 120KHz to 134KHz, the definition in the operating frequency whole world of hyperfrequency is not the most identical, such as the frequency of Europe and the definition of part Asia is 868MHz, the frequency range of North America definition is between 902MHz to 905MHz, and the frequency range in Japan's definition is between 950MHz to 956MHz.
Apply above-mentioned wireless scene equipment, technical solutions of the utility model also provide for a kind of wireless location method, including: when the toy with identity sensing unit enters the specific region in scene, the authentication information of described toy is read by sensing recognition unit, described specific region is in the induction range of induction antenna, and described authentication information includes the information for identifying toy identity；Obtain the authentication information that described sensing recognition unit reads, to determine identity and the positional information of described toy.
During actual application, according to game design demand, can be disposed with multiple induction antenna in described scene, the induction range of each induction antenna is different；The described identity determining described toy and positional information include: the authentication information read according to described sensing recognition unit and the induction range of induction antenna determine identity and the positional information of described toy.
Further, described wireless location method also includes: send identity and the positional information of described toy to manipulation end.Described wireless location method also includes: obtain the feedback information of described manipulation end.When being embodied as, the mechanics of communication such as Bluetooth, radio frequency, Wi-Fi, ZigBee can be used to transmit positional information or feedback information with described manipulation end.
In sum, wireless scene equipment and the wireless location method of technical solutions of the utility model has the following characteristics that
Induction antenna can be exemplary flexibly deployable in scene, when the induction range of the toy entrance induction antenna with identity sensing unit just can accurately be identified and position, induction antenna and sensing recognition unit may operate under adverse circumstances, it is not affected by the surrounding environment, also can recognize that the toy of high-speed mobile, therefore fixation and recognition precision is high, and the requirement to scene environment is low.
Using multiple antenna design, multiple induction antennas can utilize the induction range of different antennae to realize multizone location with flexible arrangement diverse location in scene, and each region can identify and position multiple toy, and therefore extensibility is strong.
By wireless communication technique, identity and the positional information of toy are uploaded to manipulation end, process in real time for manipulation end and feed back, to manipulate toy for greater flexibility, it is achieved thereby that the association of toy, manipulation end and scene and the most mutual.
Wireless induction technology and wireless communication technique is used to combine, automatically the toy identified by wireless induction and position in scene of game, and carry out Real Data Exchangs by wireless telecommunications and manipulation end, it is achieved that quickly location and data interaction, and process is without manual intervention, automaticity is high.
Although this utility model is open as above with preferred embodiment; but it is not for limiting this utility model; any those skilled in the art are without departing from spirit and scope of the present utility model; technical solutions of the utility model are made possible variation and amendment by the method and the technology contents that may be by the disclosure above; therefore; every content without departing from technical solutions of the utility model; any simple modification, equivalent variations and the modification made above example according to technical spirit of the present utility model, belongs to the protection domain of technical solutions of the utility model.
Claims (10)
1. a wireless scene equipment, it is characterised in that including: induction antenna, sensing recognition unit and control unit, wherein,
When the toy with identity sensing unit enters the specific region in scene, described sensing recognition unit is for reading the authentication information of described toy, described specific region is in the induction range of described induction antenna, and described authentication information includes the information for identifying toy identity；
Described control unit is for obtaining the authentication information that described sensing recognition unit reads, to determine identity and the positional information of described toy.
2. wireless scene equipment as claimed in claim 1, it is characterized in that, including multiple induction antennas, the induction range of each induction antenna is different, and described control unit determines identity and the positional information of described toy for the induction range of the authentication information read according to described sensing recognition unit and induction antenna.
3. wireless scene equipment as claimed in claim 1, it is characterised in that described control unit is additionally operable to send to manipulation end identity and the positional information of described toy.
4. wireless scene equipment as claimed in claim 3, it is characterised in that described control unit is additionally operable to obtain the feedback information of described manipulation end.
5. wireless scene equipment as claimed in claim 3, it is characterised in that also include that radio communication unit, described control unit and manipulation end transmit information by described radio communication unit.
6. wireless scene equipment as claimed in claim 5, it is characterised in that described radio communication unit uses bluetooth, Wi-Fi, radio frequency or ZigBee mechanics of communication.
7. wireless scene equipment as claimed in claim 1, it is characterised in that described control unit is additionally operable to the identity according to described toy and positional information performs light efficiency and/or sound effect controls operation.
8. wireless scene equipment as claimed in claim 1, it is characterised in that described control unit is additionally operable to control described sensing recognition unit and the identity sensing unit of described toy is performed write operation.
9. the wireless scene equipment as described in any one of claim 1 to 8, it is characterised in that described induction antenna is RFID antenna, described sensing recognition unit is rfid interrogator, and described identity sensing unit is RFID label tag.
10. the wireless scene equipment as described in any one of claim 1 to 8, it is characterised in that described induction antenna is NFC antenna, described sensing recognition unit is NFC module, and described identity sensing unit is NFC module.
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| CN201620230983.2U CN205430620U (en) | 2016-03-24 | 2016-03-24 | Wireless scene equipment |
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| CN201620230983.2U CN205430620U (en) | 2016-03-24 | 2016-03-24 | Wireless scene equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106991893A (en) * | 2017-04-24 | 2017-07-28 | 广西民族师范学院 | One kind simulation foundation sand table |
| CN108108642A (en) * | 2017-11-15 | 2018-06-01 | 北京橄榄家园科技有限公司 | intelligent electronic toy based on radio frequency identification |
-
2016
- 2016-03-24 CN CN201620230983.2U patent/CN205430620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106991893A (en) * | 2017-04-24 | 2017-07-28 | 广西民族师范学院 | One kind simulation foundation sand table |
| CN108108642A (en) * | 2017-11-15 | 2018-06-01 | 北京橄榄家园科技有限公司 | intelligent electronic toy based on radio frequency identification |
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Granted publication date: 20160803 |