CN201110964Y - Household control network system - Google Patents
Household control network system Download PDFInfo
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- CN201110964Y CN201110964Y CNU2007200300637U CN200720030063U CN201110964Y CN 201110964 Y CN201110964 Y CN 201110964Y CN U2007200300637 U CNU2007200300637 U CN U2007200300637U CN 200720030063 U CN200720030063 U CN 200720030063U CN 201110964 Y CN201110964 Y CN 201110964Y
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Abstract
The utility model discloses a household control network system, comprising a central control device, a central wireless transceiver module which is connected with the central control device, a household appliance at the terminal and a terminal wireless transceiver module connected with the household appliance at the terminal; wherein the central wireless transceiver module communicates with the terminal wireless transceiver module through a wireless network based on ZIGBEE protocol. Adopting wireless communication mode based on ZIGBEE standard, the household control network system maintains the advantages of low power consumption and strong networking capability of the ZIGBEE mode, and the communication distance is long, thus satisfying the needs of a household network. Besides, the wireless transceiver modules are integrated with the functions of receiving and transmitting, thereby reducing cost. Meanwhile, a ZIGBEE chip is cheap, thus reducing cost from another side.
Description
Technical field
The utility model relates to the household equipment interconnection technique, relates in particular to a kind of family control network system.
Background technology
Present Control Network technology comprises: power line carrier control technology (PLC), bus control technology, infrared control technology, wireless network control technology etc.
The wireless network control technology is the network control technology that produces along with the industrial technology progress after entering 21st century.But the wireless network control technology has numerous advantages such as free distributed characteristics, high fault tolerance, big overlay area remote monitoring, becomes in the recent period one of important focus of network research in the world.Under the promotion of IT wave, globalization processs such as traffic, information, economy, environment are accelerated greatly, and " digital family system " of a notion Network Based forms gradually.
In the prior art, realize that family control network system mainly adopts dual mode: first kind is to adopt based on the radio frequency of 433MHz to realize wireless telecommunications; Another kind is to adopt Bluetooth technology to realize wireless telecommunications.
For first kind of mode, do not have the emission module owing to the home appliance as its terminal only has receiver module, so function is limited; On the other hand, if on home appliance, add wireless transmitter module, then can increase its volume again and raise the cost as terminal.And because it adopts a kind of self-defining wireless communication mode, its lower floor does not have standard agreement and supports, thus its MANET ability a little less than.
For the second way,, thereby make its position that certain limitation be arranged to the terminal home appliance because the Bluetooth technology transmission range is shorter.And,, increased application cost from another point of view because the power consumption of bluetooth is bigger.Simultaneously, because the chip price costliness relevant with Bluetooth technology, therefore, it is also very huge to set up the hardware and software cost that this network system spends.
Therefore, demand occurring a kind of low cost, low energy consumption and the strong family control network system of MANET ability urgently.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of low cost, low energy consumption and the strong family control network system of MANET ability.
In order to solve the problems of the technologies described above, the utility model proposes a kind of family control network system, comprise central control equipment, the center radio receiving transmitting module that is connected with this central control equipment, terminal home appliance and the terminal wireless transceiver module that is connected with described terminal home appliance; Wherein, described center radio receiving transmitting module and described terminal wireless transceiver module adopt the wireless network based on the ZIGBEE agreement to carry out communication.
Described wireless network adopts star topology, and described center radio receiving transmitting module is the Centroid of described star topology, and described terminal wireless transceiver module is the endpoint node of described star topology.
Further, in described central control equipment, comprise MCU and the serial communication interface that is connected with described MCU.In described center radio receiving transmitting module and described terminal wireless transceiver module, all include MCU and the ZIGBEE radio-frequency module and the serial communication interface that are connected with described MCU.Wherein, described central control equipment connects the serial communication interface of described center radio receiving transmitting module by its serial communication interface; Described terminal home appliance connects the serial communication interface of described terminal wireless transceiver module by its serial communication interface, to realize the wired connection between central control equipment and center radio receiving transmitting module and terminal home appliance and the terminal wireless transceiver module.
Preferably, described serial communication interface can adopt the RS232 interface to realize.
Further again, in order to realize the communication that is connected of described central control equipment and other network equipment, in described central control equipment, also comprise the Ethernet interface that is connected with its inner MCU; Infrared remote control instruction for described central control equipment can receiving terminal home appliance telepilot be sent also comprises the infrared remote control receiving head piece that is connected with its inner MCU in described central control equipment.
In addition, adopt following communications protocol form between described center radio receiving transmitting module and the described terminal wireless transceiver module:
Transmitting terminal: command word+Target id+source ID+ orders bag+check bit;
Receiving end: ACK command word+Target id+source ID+ orders bag+check bit.
Further again, also all include in described center radio receiving transmitting module and described terminal wireless transmitting-receiving mould and its inner corresponding ZIGBEE radio-frequency module power amplifier module that is connected and the power amplifier switch module that is connected with described power amplifier module and the memory module that is connected with its inner corresponding MCU, the control end of described power amplifier switch module connects MCU.
In addition, in described central control equipment, also comprise the memory module that is connected with its inner MCU.
The utility model therefore inherited low-power consumption and the strong advantage of MANET ability of ZIGBEE, and its communication distance is also far away, can satisfy the demand of family wireless network owing to the wireless network communication mode that has adopted based on the ZIGBEE standard.And therefore radio receiving transmitting module described in the utility model has reduced cost owing to integrated receive and send out two kinds of functions; Simultaneously, because the price of ZIGBEE chip is lower, also reduced cost from another point of view.
Description of drawings
The schematic network structure of a kind of embodiment of the family control network system that Fig. 1 the utility model is proposed;
Fig. 2 is the topological structure synoptic diagram of wireless network among Fig. 1;
Fig. 3 is the structured flowchart of an embodiment of central control equipment among Fig. 1;
Fig. 4 is the structured flowchart of an embodiment of center radio receiving transmitting module and terminal wireless transceiver module among Fig. 1;
Fig. 5 is circuit theory diagrams embodiment illustrated in fig. 4;
Fig. 6 is a transmitting terminal protocol format embodiment illustrated in fig. 1;
Fig. 7 is a receiving end protocol format embodiment illustrated in fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
With reference to figure 1, illustrate the schematic network structure of an embodiment of a kind of family control network system that the utility model proposes.As shown in Figure 1, comprise central control equipment 1, the center radio receiving transmitting module 1 ' that is connected with central control equipment 1, refrigerator 2, the terminal wireless transceiver module 2 ' that is connected with refrigerator 2, washing machine 3, the terminal wireless transceiver module 3 ' that is connected with washing machine 3, TV 4, the terminal wireless transceiver module 4 ' that is connected with TV 4, air-conditioning 5, the terminal wireless transceiver module 5 ' that is connected with air-conditioning 5.Wherein, carry out wireless telecommunications between described center radio receiving transmitting module 1 ' and the terminal wireless transceiver module 2 ', 3 ', 4 ', 5 ', the communication between the terminal wireless transceiver module 2 ', 3 ', 4 ', 5 ' is transmitted by center radio receiving transmitting module 1 '.Described terminal wireless transceiver module 2 ', 3 ', 4 ', 5 ' with corresponding respectively terminal home appliance refrigerator 2, washing machine 3, TV 4, air-conditioning 5 between carry out wired connection.Wherein, being connected between described terminal home appliance 2,3,4,5 and the terminal wireless transceiver module 2 ', 3 ', 4 ', 5 ' can be adopted the communication of serial transmission mode, also can adopt the communication of serial transmission mode between described central control equipment 1 and the center radio receiving transmitting module 1 ', above-mentioned serial transmission mode preferably can adopt RS232 serial ports transmission standard.
For example, for being connected between terminal wireless transceiver module 2 ' and the refrigerator 2, described terminal wireless transceiver module 2 ' carries out data communication by the MCU of RS232 serial communication mode and refrigerator 2, (central control equipment 1 is sent to center radio receiving transmitting module 1 ' with control command by the RS232 interface with its control command from central control equipment 1 that receives, center radio receiving transmitting module 1 ' carries out wireless transmit by the wireless network based on the ZIGBEE consensus standard with this control command, and then receive this order by terminal wireless transceiver module 2 ') be sent to refrigerator 2, and receive the feedback information of refrigerator 2, what this feedback information was sent to described control command the most at last sends end (being central control equipment 1).Can analogy obtain for other terminal household equipment, do not give unnecessary details at this.
With reference to figure 2, illustrate the topological structure synoptic diagram of wireless network among Fig. 1.As shown in Figure 2, this figure embodies the topological structure of the ZIGBEE wireless communication networks of forming between center radio receiving transmitting module 1 ' among Fig. 1 and each terminal wireless transceiver module.What by this figure as can be seen, it adopted is the hub-and-spoke network topology structure.Wherein, what be positioned at the center is center radio receiving transmitting module 1 ', and it is the Centroid of whole Star Network; Around being positioned at is terminal node, and it is counterpart terminal radio receiving transmitting module 2 ', 3 ', 4 ', 5 ' respectively.Centroid 1 in the Centroid 1 ' of this Star Network (among the figure dotted line delineation) and other network " communicate by letter.In addition, the position of described center radio receiving transmitting module 1 ' in Star Network is equivalent to the repeater in the ZIGBEE agreement, and terminal wireless transceiver module 2 ', 3 ', 4 ', 5 ' is equivalent to the terminal device in the ZIGBEE agreement.
With reference to figure 3, illustrate the structured flowchart of an embodiment of central control equipment 1 among Fig. 1.As shown in Figure 3, central control equipment 1 comprises MCU11, connects RJ45 Ethernet interface 13, RS232 serial line interface 14, infrared remote control receiving head piece 15 and the memory module 12 of this MCU11.Wherein, central control equipment 1 connects external ethernet equipment by the RJ45 Ethernet interface, PC etc. for example, and described Ethernet can be an Internet, uses with convenient.Central control equipment 1 connects center radio receiving transmitting module 1 ' by the RS232 interface, control command is sent to described center radio receiving transmitting module 1 ', and is carried out the encapsulation of ZIGBEE agreement and carried out wireless transmit by this center radio receiving transmitting module 1 '.Described infrared remote control receiving head piece 15 is used for the infrared remote control instruction that the receiving terminal apparatus telepilot sends, and the MCU that this infrared remote control instruction is sent to terminal device inside is instructed identification and handling.
The major function of this central control equipment 1 is to carry out forwarding of data, all transmits by this central control equipment 1 to the control command of each terminal home appliance and from the feedback information of each terminal home appliance.Described memory module 12 is used to store data to be transmitted, and specifically can adopt eeprom memory.
With reference to figure 4, illustrate the structured flowchart of an embodiment of center radio receiving transmitting module and terminal wireless transceiver module among Fig. 1.As shown in Figure 4, described radio receiving transmitting module comprises MCU61, the ZIGBEE radio-frequency module 62 that is connected with MCU61, power amplifier module 63 and power amplifier switch module 64, and the RS232 serial communication interface 65 that connects described MCU61.
Described power amplifier switch module 64 in order to control power amplifier module 63 work and be controlled by MCU61, when needs emission data, MCU61 control power amplifier switch module 64 starts, the lower floor of ZIGBEE radio-frequency module 62 is built-in ZIGBEE protocol stack, armed data are carried out exporting power amplifier module 63 to after the ZIGBEE protocol encapsulation carry out processing and amplifying, and then launch by power amplifier switch module 64 and antenna.The process of a wireless transmit has more than been described, for the process of wireless receiving, be the inverse process of emission: when having detected rf data and need receive, MCU61 control power amplifier switch module 64 starts, and will transfer to described ZIGBEE radio-frequency module 62, and convert rf data to the spi bus data transmission to MCU61 by described ZIGBEE radio-frequency module 62 by the rf data that antenna receives; MCU61 resolves the information that receives and relevant information is sent to that its pairing equipment (central control equipment or terminal home appliance) is carried out or forwarding etc. by RS232 interface 65.
With reference to figure 5, illustrate circuit structure diagram embodiment illustrated in fig. 4.As shown in Figure 5, the MCU61 shown in the IC1 corresponding diagram 4, the ZIGBEE radio-frequency module 62 shown in the IC2 corresponding diagram 4, the power amplifier module 63 shown in the IC4 corresponding diagram 4, the power amplifier switch module 64 shown in the IC5 corresponding diagram 4.
Transmitting terminal (center radio receiving transmitting module and terminal wireless transceiver module all can be used as transmitting terminal), between IC1 and the IC2 by the SPI mouth communicate (SS1 among the IC1, MISO1, MOSI1, SPICLK1 mouth respectively with IC2 in corresponding connection of CEBi, MISOo, MOSIi, SPICLKi, specifically can be) with reference to the service manual of related chip, the related register of IC2 is set, start the wireless transmission ability of IC2, the order bag is sent by wireless mode, wait for that receiving end receives.
Receiving end (center radio receiving transmitting module and terminal wireless transceiver module all can be used as receiving end), IC1 communicates by SPI mouth and IC2, the related register of IC2 is set, start the wireless receiving ability of IC2, after receiving wireless data, IC1 reads the wireless data that IC2 receives by the SPI mouth, and operates accordingly according to the data that receive, and replys transmitting terminal or transmits data to RS232 mouth or TTL serial ports etc.
Wherein, IC3 is the EPROM chip, and it is connected with the PTB mouth of IC1 by CS, SK, DI, DO, finishes the memory function of data.Differential signal input end RIN_M, the RIN_P of IC2 is connected the OUT2 port of IC5 with capacitor C 17 by inductance L 1, transformer T1; Differential signal output terminal RAO_M, the RAO_P of IC2 is connected the input end RFin of IC4 by inductance L 2, transformer T2 with capacitor C 11, and then connects the OUT1 port of IC5 through the capacitor C 18 of series connection by the output terminal RFout of IC4.The power port VDD of IC5 connects the PTC6 port of IC1, and when IC5 works on power with control; The control port VCONT of IC5 connects the PTC7 port of IC1, to determine the strobe state of its two switch passages; The INPUT port of IC5 is connected antenna ANT by capacitance C41 with LC filter network L4, C40.When center radio receiving transmitting module or terminal wireless transceiver module need be launched data, PTC6, PCT7 output high level signal by its IC1, on the one hand control IC5 and enter duty, control IC5 on the other hand and be communicated with switch ways between its INPUT and the OUT1.IC1 outputs to armed data among the IC2 by the SPI mouth, after by IC2 it being carried out the encapsulation process of ZIGBEE agreement, generate radio frequency balanced differential signal by its differential signal output terminal RAO_M, RAO_P output, and then change under the effect of transformer T2 single-ended to earth signal after, carrying out power amplification by IC4 handles, so that farther reception and transmission range to be provided, and finally launch by IC5 and antenna ANT.And when center radio receiving transmitting module or terminal wireless transceiver module need receive data, PTC6 port output high level signal by its IC1, control IC5 enters duty, and by its PCT7 port output low level signal, control IC5 is communicated with the switch ways between its INPUT and the OUT2.The data that receive by antenna ANT input to IC2 through capacitor C 17 couplings, transformer T1 after converting differential signal to; IC2 becomes the spi bus data with the data-switching that receives, and outputs among the IC1 by the SPI mouth; After IC1 resolves identification to the data that receive, control connected equipment (central control equipment or terminal home appliance) and carry out corresponding operating.
The TxD3 of IC1, RxD3 mouth also are connected to interface level change-over circuit (Fig. 5 does not show), in order to general+3VTTL level conversion one-tenth+5VTTL level.Because other connection is conventional the connection, and those skilled in the art can be easy to realize according to the correlation technique handbook, no longer more fully set forth at this.
With reference to figure 6, illustrate transmitting terminal protocol format embodiment illustrated in fig. 1.As shown in the figure, described command word represents that this is transmitted as steering order, described Target id is that (every home appliance Shi Douhui that dispatches from the factory has a globally unique numbering for the ID of desire control home appliance, this numbering is the ID of home appliance), described source ID is the ID of transmitting end equipment, described order bag is the concrete order of this time control, for example can be to start refrigerating function or enter energy saver mode or the like for the control of refrigerator, described check bit is the proof test value of aforementioned all bytes except that command word, it can adopt simply and add up, and also can adopt parity checking or CRC check or the like.
When receiving above-mentioned steering order, receiving end just will instruct the MCU that is forwarded to its pairing home appliance by serial ports, by MCU control corresponding action.After described home appliance was finished described steering order, receiving end just sent feedback information to transmitting terminal, and concrete protocol format is with reference to shown in Figure 7.Among Fig. 7, described ACK command word is expressed as answer signal, described Target id is transmitting terminal ID, described source ID is the ID of described home appliance, the implementation status that described order bag is described steering order (can be divided into successful execution, carry out failure, can't find relevant device etc.), described check bit is the proof test value of above-mentioned all bytes except that the ACK command word, and it can adopt simply and add up, and also can adopt parity checking or CRC check or the like.
Above-mentioned transmitting terminal all is relative with receiving end, for example its transmitting terminal in fact just when receiving end emission feedback information.Described transmitting terminal and receiving end are center radio receiving transmitting module or terminal wireless transceiver module.
Below a concise and to the point course of work setting forth system described in the utility model.
Suppose, the user is positioned at company now, this moment, he can land central control equipment 1 and sending controling instruction by computer and internet, such as starting air conditioner refrigerating function and design temperature, then this moment, this steering order transferred to center radio receiving transmitting module 1 ' by central control equipment 1 by described RS232 serial ports, and center radio receiving transmitting module 1 ' is encapsulated as ZIGBEE Frame and radio frequency output according to the ZIGBEE lower-layer protocols with this steering order; At this moment, four terminal wireless transceiver modules all can receive this Frame and judge whether the Target id in this frame is the ID that its household electrical appliances that link to each other set among Fig. 1, if not then do not process, otherwise by the RS232 serial ports this frame is sent to it and is connected home appliance, promptly this moment, air-conditioning 5 can receive control information from terminal wireless transceiver module 5 ', and the MCU of air-conditioning 5 carries out the steering order that receives.If run succeeded, then send feedback information to terminal wireless transceiver module 5 ', and be forwarded to center radio receiving transmitting module 1 ' by it, and center radio receiving transmitting module 1 ' is sent to central control equipment 1 with this feedback information, and central control equipment 1 forwards it to the computer at described user place again.
Above-mentioned work also process can also adopt Infrared remote controller to realize, promptly the user is sent to central control equipment 1 by the home appliance telepilot with steering order, because comparatively simple and process and foregoing description are similar, just is not described in detail.
In the description of above-mentioned Long-distance Control air-conditioning, the form of the Frame that center radio receiving transmitting module 1 ' sends becomes form shown in Figure 6, and the protocol format that information adopted that self terminal radio receiving transmitting module 5 ' is returned is form shown in Figure 7.
Need to prove, just can coupled home appliance after each terminal wireless transceiver module powers in the native system communicate obtaining the id number of described home appliance, and be kept at its EPROM the inside.And, if transmitting terminal does not receive the answer signal of receiving end, then can continue to send several times, if still do not receive answer signal, this home appliance relevant terminal radio receiving transmitting module fault then is described or not in network, reports to the sender simultaneously.
In addition, when setting up network described in the utility model, the ID of each home appliance of registration under the administration interface of central control equipment 1.Like this, if just do not receive when an ID does not belong to the Frame of present networks and do not process.Equally, when new home appliance is introduced, must go into network process, just its id number of registration in central control equipment 1.
Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (9)
1. a family control network system is characterized in that, comprises central control equipment, the center radio receiving transmitting module that is connected with this central control equipment, terminal home appliance and the terminal wireless transceiver module that is connected with described terminal home appliance; Wherein, described center radio receiving transmitting module and described terminal wireless transceiver module adopt the wireless network based on the ZIGBEE agreement to carry out communication.
2. family control network system according to claim 1 is characterized in that, comprises MCU and the serial communication interface that is connected with described MCU in described central control equipment.
3. family control network system according to claim 2 is characterized in that, all includes MCU and the ZIGBEE radio-frequency module and the serial communication interface that are connected with described MCU in described center radio receiving transmitting module and described terminal wireless transceiver module.
4. family control network system according to claim 3 is characterized in that, described central control equipment connects described center radio receiving transmitting module by its serial communication interface; Described terminal home appliance connects described terminal wireless transceiver module by its serial communication interface.
5. domestic network controlling system according to claim 4 is characterized in that, described serial communication interface is the RS232 interface.
6. family control network system according to claim 4 is characterized in that, also comprises the infrared remote control receiving head piece and the Ethernet interface that are connected with its inner MCU in described central control equipment.
7. according to each described family control network system in the claim 1 to 6, it is characterized in that, described wireless network adopts star topology, described center radio receiving transmitting module is the Centroid of described star topology, and described terminal wireless transceiver module is the endpoint node of described star topology.
8. according to each described family control network system in the claim 1 to 6, it is characterized in that: in described center radio receiving transmitting module and described terminal wireless transmitting-receiving mould, also all include the power amplifier module that is connected with its inner corresponding ZIGBEE radio-frequency module.
9. domestic network controlling system according to claim 8, it is characterized in that, in described center radio receiving transmitting module and described terminal wireless transmitting-receiving mould, also all include the memory module that is connected with its inner corresponding MCU, and the power amplifier switch module that is connected with its inner corresponding power amplifier module, the control end of described power amplifier switch module connects MCU; In described central control equipment, also comprise the memory module that is connected with its inner MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200300637U CN201110964Y (en) | 2007-10-30 | 2007-10-30 | Household control network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200300637U CN201110964Y (en) | 2007-10-30 | 2007-10-30 | Household control network system |
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| CN201110964Y true CN201110964Y (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200300637U Expired - Fee Related CN201110964Y (en) | 2007-10-30 | 2007-10-30 | Household control network system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183903A (en) * | 2011-05-03 | 2011-09-14 | 苏州聚元微电子有限公司 | Wall surface electronic switch controller capable of realizing multi-point control |
| CN102495614A (en) * | 2011-12-26 | 2012-06-13 | 奕天电子科技（上海）有限公司 | Intelligent household control system |
| CN102566532A (en) * | 2011-11-17 | 2012-07-11 | 广州视声电子实业有限公司 | KNX (Konnex) bus equipment-based control system |
| CN102694706A (en) * | 2012-03-21 | 2012-09-26 | 广东美的电器股份有限公司 | Internet of things type home appliance system with cloud service function and method for controlling internet of things type home appliance system |
| CN103032356A (en) * | 2011-09-30 | 2013-04-10 | 深圳光启高等理工研究院 | Intelligent fan |
| CN105988421A (en) * | 2015-02-12 | 2016-10-05 | 上海磐颖实业有限公司 | Remote digital transmission control module integrating functions of transmitting, receiving, relaying and controlling |
| CN106205107A (en) * | 2016-06-23 | 2016-12-07 | 广州极汇信息科技有限公司 | A kind of Intelligent shopping trolley management system and method |
-
2007
- 2007-10-30 CN CNU2007200300637U patent/CN201110964Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183903A (en) * | 2011-05-03 | 2011-09-14 | 苏州聚元微电子有限公司 | Wall surface electronic switch controller capable of realizing multi-point control |
| CN103032356A (en) * | 2011-09-30 | 2013-04-10 | 深圳光启高等理工研究院 | Intelligent fan |
| CN103032356B (en) * | 2011-09-30 | 2016-09-28 | 深圳光启高等理工研究院 | Intelligent fan |
| CN102566532A (en) * | 2011-11-17 | 2012-07-11 | 广州视声电子实业有限公司 | KNX (Konnex) bus equipment-based control system |
| CN102495614A (en) * | 2011-12-26 | 2012-06-13 | 奕天电子科技（上海）有限公司 | Intelligent household control system |
| CN102694706A (en) * | 2012-03-21 | 2012-09-26 | 广东美的电器股份有限公司 | Internet of things type home appliance system with cloud service function and method for controlling internet of things type home appliance system |
| CN105988421A (en) * | 2015-02-12 | 2016-10-05 | 上海磐颖实业有限公司 | Remote digital transmission control module integrating functions of transmitting, receiving, relaying and controlling |
| CN106205107A (en) * | 2016-06-23 | 2016-12-07 | 广州极汇信息科技有限公司 | A kind of Intelligent shopping trolley management system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080903 Termination date: 20101030 |