CN105406972A - Wired and wireless switching control system and switching control method based on microcontroller - Google Patents
Wired and wireless switching control system and switching control method based on microcontroller Download PDFInfo
- Publication number
- CN105406972A CN105406972A CN201510414619.1A CN201510414619A CN105406972A CN 105406972 A CN105406972 A CN 105406972A CN 201510414619 A CN201510414619 A CN 201510414619A CN 105406972 A CN105406972 A CN 105406972A
- Authority
- CN
- China
- Prior art keywords
- module
- tcp
- communication
- gprs
- wireless telecommunications
- 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.)
- Pending
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a wired and wireless switching control system and a switching control method based on a microcontroller. The switching control system mainly comprises a wired communication TCP/IP module and a wireless communication GPRS module; the wired communication TCP/IP module mainly regards a DP83848 module as the core, and the wire communication TCP/IP module is connected with the microcontroller ARM and used for establishing TCP/IP connection and data transmission; the wireless communication GPRS module mainly regards a SIM900 communication module as the core and is connected with the microcontroller ARM in a serial port control manner, the control of the SIM900 is performed via an AT instruction, and network connection is established; the microcontroller ARM is respectively connected with the wired communication TCP/IP module and the wireless communication GPRS module so that the control and switching of wired communication TCP/IP and wireless communication GPRS are realized; according to the switching control method, when the sending of the TCP/IP module is abnormal, the GPRS module is rapidly turned on, and data transmission is accomplished; after certain interval, whether the TCP/IP is recovered to be normal is detected; if the TCP/IP is recovered to be normal, later data transmission is accomplished by the TCP/IP; and if the TCP/IP is still not normal, the GPRS accomplishes data transmission as emergency communication.
Description
Technical field
What the present invention relates to is a kind of based on the wired of microcontroller and wireless handover control system and method, belongs to wired TCP/IP communication and wireless GPRS communication technique field.Take wire communication as conventional communications, wireless telecommunications are communication for subsequent use, realize conventional communications to communication for subsequent use, communication for subsequent use to the switching of conventional communications.Be applicable to any occasion high to Realtime Capability of Communication requirement.
Background technology
In the epoch of these " large data ", communication and transfer of data are bases, have a good communication environment just to seem particularly important.
Wired TCP/IP communication has the features such as transmission rate is fast, long transmission distance, antijamming capability are strong, but wire communication process is by restrictions such as optical cable, netting twine, wirings, once communication line is impaired, communication is paralysed.
Wireless GPRS communication has permanent online, charging according to quantity, transmission digit rate high.But wireless GPRS exists packet loss phenomenon, wireless GPRS grouping sends data by different directions, finally reaches identical destination, the situation that data just one or several packet loss may occur or make mistakes in by the process of transmission of radio links.
In view of the feature of above two kinds of technology, need one with wired TCP/IP communication for conventional communications, wireless GPRS does the communication modes of communication for subsequent use.After wired TCP/IP communication disconnects, rapid open wireless GPRS ensures the normal connection of communication, after waiting wired TCP/IP to recover communication, automatically switches to wired TCP/IP communication by wireless GPRS communication, ensures the unimpeded of communication.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, and provide a textural association reasonable, easy to use and reliable, existing advantage that is wired and wireless two kinds of communication modes can be made full use of and carry out effective Schema control and switching, ensure the uninterrupted of communication network, economize on resources, reduce use cost based on the wired of microcontroller and wireless handover control system and method for handover control.
The object of the invention is to have come by following technical solution, a kind of based on the wired of microcontroller and wireless handover control system, it mainly includes line communication TCP/IP module and wireless telecommunications GPRS module, described wire communication TCP/IP module mainly with DP83848 module for core, be connected with microcontroller ARM, carry out the connection of TCP/IP and set up and transfer of data;
Wireless telecommunications GPRS module mainly with SIM900 communication module for core, be connected with microcontroller ARM by serial ports control mode, and carry out the control of SIM900 by AT instruction, set up network connect;
Described microcontroller ARM is connected to control and the switching that line communication TCP/IP module and wireless telecommunications GPRS module realize wire communication TCP/IP and wireless telecommunications GPRS.
Wire communication TCP/IP module of the present invention also comprises network interface circuit; Described wireless telecommunications GPRS module also comprises SIM card circuit, status indicator lamp circuit, outer antennas; At separated in time, described microcontroller ARM by arranging communication mode and judging that Current communications pattern calls a module in described wire communication TCP/IP module and wireless telecommunications GPRS module, and checks whether wire communication TCP/IP module recovers normal.
Draw-in groove SIM card in wireless telecommunications GPRS module of the present invention is provided with GPRS client identification module, GPRS communicating circuit in wireless telecommunications GPRS module also comprises SIM900 communication module, TXD, RXD, PWRKEY pin of this SIM900 communication module connects described microcontroller, SIM_VDD, SIM_DATA, SIM_RST, SIM_CLK pin is connected with GPRS client identification module by draw-in groove SIM card, RF_ANT pin connects GPRS transmitting antenna P1, and STATUS, NETLIGHT pin is connected with status indicator lamp;
The DP83848 module of described wire communication TCP/IP module, TX_EN, TXD_0, TXD_1, RESET_N, MDIO, MDC, CRS, RX_ER, RXD_0, RXD_1 pin of this module is connected with microcontroller ARM, X1 pin connects crystal oscillator, and TD+, TD-, RD+, RD-, LED-LINK, LED_ACK pin connects network interface.
Utilize an above-mentioned method of carrying out switching controls based on the wired of microcontroller and wireless handover control system, described method for handover control mainly switches communication mode by microcontroller ARM and calls corresponding communication module; Under normal circumstances, communication mode is set to wire communication TCP/IP pattern, by communication mode, microcontroller ARM judges that calling wire communication TCP/IP module completes transfer of data;
When wire communication TCP/IP module sends abnormal, network connects and disconnects, data transmission fails and retransmit time-out, then arranging communication mode is wireless telecommunications GPRS; When poll enters next round transfer of data, ARM judges call wireless telecommunications GPRS module and complete later transfer of data by communication mode;
After the connection of wire communication TCP/IP module disconnection network reaches certain hour interval, communication mode is set to wire communication TCP/IP pattern; Poll enter next time communication mode time call wire communication TCP/IP module, check whether this module recovers normal communication, if recover normal, continue with these module transfer data; If this module is abnormal, communication mode is set to wireless telecommunications GPRS pattern, continues with wireless telecommunications GPRS module transmission data.
The concrete steps of method for handover control of the present invention are:
Step 1: corresponding initialization operation is carried out to microcontroller ARM.Initialize Timer, for judging in communication process that retransmitting time-out provides timing services with timing time-out.Retransmit time-out for judging whether wire communication TCP/IP has disconnected network and connected; Whether timing time-out is used for regularly patrolling and examining wire communication TCP/IP and has recovered to connect; Initiating communications pattern is wire communication TCP/IP pattern;
Step 2: initialization is carried out to wire communication TCP/IP module, corresponding pin configuration, enable setting, the network informations such as configuration of IP address;
Step 3: initialization is carried out to wireless telecommunications GPRS module, corresponding pin configuration, enable setting, serial ports initialization;
Step 4: judge Current communications pattern; If wire communication TCP/IP pattern, then enter step 5; If wireless telecommunications GPRS pattern, then enter step 11;
Step 5: judge whether wireless telecommunications GPRS opens.If open, enter step 6; Do not open, enter step 7;
Step 6: close wireless telecommunications GPRS, enter step 7;
Step 7: carry out transfer of data by wire communication TCP/IP, enter step 8;
Step 8: judge that whether transmission is successful, whether network connects normal; If normal, then enter 4; Abnormal, then enter step 9;
Step 9: judge that whether repeating transmission is overtime; If time-out, then do not enter step 4; Retransmit time-out and then enter step 10;
Step 10: Current communications pattern is set to wireless telecommunications GPRS pattern; Enter step 4;
Step 11: judge whether wireless telecommunications GPRS opens; If do not open, enter step 12; Open and then enter step 13;
Step 12: open wireless communication GPRS; Enter step 13;
Step 13: carry out transfer of data by wireless telecommunications GPRS; Enter step 14;
Step 14: whether overtimely judge that wire communication TCP/IP interval is patrolled and examined in timing; If time-out, does not enter step 4; Time-out then enters step 15;
Step 15: Current communications pattern is set to wire communication TCP/IP pattern; Enter step 4.
It is reasonable that the present invention has textural association, easy to use and reliable, can make full use of existing advantage that is wired and wireless two kinds of communication modes and carry out effective Schema control and switching, ensures the uninterrupted of communication network, economize on resources, and reduces the features such as use cost.
Accompanying drawing explanation
Fig. 1 is the block schematic illustration of structure of the present invention composition.
Fig. 2 is TCP/IP communicating circuit schematic diagram of the present invention.
Fig. 3 is the circuit theory diagrams of supplementing of TCP/IP communicating circuit of the present invention and network interface.
Fig. 4 is GPRS communicating circuit schematic diagram of the present invention.
Fig. 5 is the supplementing of GPRS communicating circuit of the present invention, relay indicating light and SIM card circuit theory diagrams.
Fig. 6 is the flow chart of method for handover control of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail: shown in Fig. 1, of the present invention a kind of based on the wired of microcontroller and wireless handover control system, it mainly includes line communication TCP/IP module 1 and wireless telecommunications GPRS module 2, described wire communication TCP/IP module 1 main with DP83848 module for core, be connected with microcontroller ARM, carry out the connection of TCP/IP and set up and transfer of data;
Wireless telecommunications GPRS module 2 main with SIM900 communication module for core, be connected with microcontroller ARM by serial ports control mode, and carry out the control of SIM900 by AT instruction, set up network connection;
Described microcontroller ARM is connected to control and the switching that line communication TCP/IP module 1 and wireless telecommunications GPRS module 2 realize wire communication TCP/IP and wireless telecommunications GPRS.
Shown in Fig. 2-5, wire communication TCP/IP module of the present invention also comprises network interface circuit; Described wireless telecommunications GPRS module also comprises SIM card circuit, status indicator lamp circuit, outer antennas; At separated in time, described microcontroller ARM by arranging communication mode and judging that Current communications pattern calls a module in described wire communication TCP/IP module and wireless telecommunications GPRS module, and checks whether wire communication TCP/IP module recovers normal.
Draw-in groove SIM card in described wireless telecommunications GPRS module is provided with GPRS client identification module, GPRS communicating circuit in wireless telecommunications GPRS module also comprises SIM900 communication module, TXD, RXD, PWRKEY pin of this SIM900 communication module connects described microcontroller, SIM_VDD, SIM_DATA, SIM_RST, SIM_CLK pin is connected with GPRS client identification module by draw-in groove SIM card, RF_ANT pin connects GPRS transmitting antenna P1, and STATUS, NETLIGHT pin is connected with status indicator lamp;
The DP83848 module of described wire communication TCP/IP module, TX_EN, TXD_0, TXD_1, RESET_N, MDIO, MDC, CRS, RX_ER, RXD_0, RXD_1 pin of this module is connected with microcontroller ARM, X1 pin connects crystal oscillator, and TD+, TD-, RD+, RD-, LED-LINK, LED_ACK pin connects network interface.
Of the present inventionly a kind ofly utilize described method of carrying out switching controls based on the wired of microcontroller and wireless handover control system, described method for handover control mainly switches by microcontroller ARM the communication module that communication mode calls correspondence; Under normal circumstances, communication mode is set to wire communication TCP/IP pattern, by communication mode, microcontroller ARM judges that calling wire communication TCP/IP module completes transfer of data;
When wire communication TCP/IP module sends abnormal, network connects and disconnects, data transmission fails and retransmit time-out, then arranging communication mode is wireless telecommunications GPRS; When poll enters next round transfer of data, ARM judges call wireless telecommunications GPRS module and complete later transfer of data by communication mode;
After the connection of wire communication TCP/IP module disconnection network reaches certain hour interval, communication mode is set to wire communication TCP/IP pattern; Poll enter next time communication mode time call wire communication TCP/IP module, check whether this module recovers normal communication, if recover normal, continue with these module transfer data; If this module is abnormal, communication mode is set to wireless telecommunications GPRS pattern, continues with wireless telecommunications GPRS module transmission data.
By said method, when TCP/IP sends abnormal, GPRS module can be opened rapidly, complete the transmission of data, and after a certain interval, check whether TCP/IP recovers normal; If TCP/IP recovers normal, then complete later transfer of data with TCP/IP; If TCP/IP does not recover normal yet, then complete transfer of data using GPRS as emergency communication.
Shown in Fig. 6, the concrete steps of method for handover control of the present invention are:
Step 1: corresponding initialization operation is carried out to microcontroller ARM.Initialize Timer, for judging in communication process that retransmitting time-out provides timing services with timing time-out.Retransmit time-out for judging whether wire communication TCP/IP has disconnected network and connected; Whether timing time-out is used for regularly patrolling and examining wire communication TCP/IP and has recovered to connect; Initiating communications pattern is wire communication TCP/IP pattern;
Step 2: initialization is carried out to wire communication TCP/IP module, corresponding pin configuration, enable setting, the network informations such as configuration of IP address;
Step 3: initialization is carried out to wireless telecommunications GPRS module, corresponding pin configuration, enable setting, serial ports initialization;
Step 4: judge Current communications pattern; If wire communication TCP/IP pattern, then enter step 5; If wireless telecommunications GPRS pattern, then enter step 11;
Step 5: judge whether wireless telecommunications GPRS opens.If open, enter step 6; Do not open, enter step 7;
Step 6: close wireless telecommunications GPRS, enter step 7;
Step 7: carry out transfer of data by wire communication TCP/IP, enter step 8;
Step 8: judge that whether transmission is successful, whether network connects normal; If normal, then enter 4; Abnormal, then enter step 9;
Step 9: judge that whether repeating transmission is overtime; If time-out, then do not enter step 4; Retransmit time-out and then enter step 10;
Step 10: Current communications pattern is set to wireless telecommunications GPRS pattern; Enter step 4;
Step 11: judge whether wireless telecommunications GPRS opens; If do not open, enter step 12; Open and then enter step 13;
Step 12: open wireless communication GPRS; Enter step 13;
Step 13: carry out transfer of data by wireless telecommunications GPRS; Enter step 14;
Step 14: whether overtimely judge that wire communication TCP/IP interval is patrolled and examined in timing; If time-out, does not enter step 4; Time-out then enters step 15;
Step 15: Current communications pattern is set to wire communication TCP/IP pattern; Enter step 4.
Embodiment:
The present invention, effectively realizes the switching between wired TCP/IP module and wireless GPRS communication module and control for core with microcontroller ARMLPC17 series.
TCP/IP communication module adopts the DP8384810/100 single port physical layer device of National Semiconductor, except having reliable communication transfer, also has low-power consumption, supports the features such as multiple intelligent power pattern.Minimum electricity is used while guarantee transmission reliability.The ethernet module that the present invention utilizes ARMLPC1700 to carry is connected with DP83848 pin (specifically seeing accompanying drawing), realizes the communication foundation of mixed-media network modules mixed-media, transfer of data and communication state and returns.
GPRS communication module is with the SIM900 module of SIMCom company for core, and this module has stable performance, the feature such as elegant in shape, powerful.Carry out exchanges data by the mode of serial ports between SIM900 module and ARM in this patent, with AT instruction control module, set up communication and connect.This GPRS module also comprises sim card slot, and GPRS client identification module is arranged in this draw-in groove, the relay indicating light circuit of reaction GPRS operating state, antenna interface circuit etc.
Because TCP/IP communication has reliable transmission performance, the antijamming capability by force and fast advantage such as transmission rate, under normal mode, under GPRS is in closed condition, connected and transfer of data by TCP/IP mode between equipment.The reasons such as TCP/IP transmission line is impaired cause and disconnect, and microcontroller ARM detects that state is off, and opens rapidly GPRS module, quick registration, connects and transmits data.In GPRS communication process, ARM timing detects the communication state of TCP/IP.Communication state returns TCP/IP and connects, then switch back TCP/IP, and closes GPRS module, saving resource.
Claims (5)
1. one kind based on the wired of microcontroller and wireless handover control system, it mainly includes line communication TCP/IP module and wireless telecommunications GPRS module, it is characterized in that described wire communication TCP/IP module mainly with DP83848 module for core, be connected with microcontroller ARM, carry out the connection of TCP/IP and set up and transfer of data;
Wireless telecommunications GPRS module mainly with SIM900 communication module for core, be connected with microcontroller ARM by serial ports control mode, and carry out the control of SIM900 by AT instruction, set up network connect;
Described microcontroller ARM is connected to control and the switching that line communication TCP/IP module and wireless telecommunications GPRS module realize wire communication TCP/IP and wireless telecommunications GPRS.
2. according to claim 1 based on the wired of microcontroller and wireless handover control system, it is characterized in that described wire communication TCP/IP module also comprises network interface circuit; Described wireless telecommunications GPRS module also comprises SIM card circuit, status indicator lamp circuit, outer antennas; At separated in time, described microcontroller ARM by arranging communication mode and judging that Current communications pattern calls a module in described wire communication TCP/IP module and wireless telecommunications GPRS module, and checks whether wire communication TCP/IP module recovers normal.
3. according to claim 2 based on the wired of microcontroller and wireless handover control system, it is characterized in that the draw-in groove SIM card in described wireless telecommunications GPRS module is provided with GPRS client identification module, GPRS communicating circuit in wireless telecommunications GPRS module also comprises SIM900 communication module, the TXD of this SIM900 communication module, RXD, PWRKEY pin connects described microcontroller, SIM_VDD, SIM_DATA, SIM_RST, SIM_CLK pin is connected with GPRS client identification module by draw-in groove SIM card, RF_ANT pin connects GPRS transmitting antenna P1, STATUS, NETLIGHT pin is connected with status indicator lamp,
The DP83848 module of described wire communication TCP/IP module, TX_EN, TXD_0, TXD_1, RESET_N, MDIO, MDC, CRS, RX_ER, RXD_0, RXD_1 pin of this module is connected with microcontroller ARM, X1 pin connects crystal oscillator, and TD+, TD-, RD+, RD-, LED-LINK, LED_ACK pin connects network interface.
4. utilize a method of carrying out switching controls described in claim 1 or 2 or 3 based on the wired of microcontroller and wireless handover control system, it is characterized in that described method for handover control mainly switches communication mode by microcontroller ARM and calls corresponding communication module; Under normal circumstances, communication mode is set to wire communication TCP/IP pattern, by communication mode, microcontroller ARM judges that calling wire communication TCP/IP module completes transfer of data;
When wire communication TCP/IP module sends abnormal, network connects and disconnects, data transmission fails and retransmit time-out, then arranging communication mode is wireless telecommunications GPRS; When poll enters next round transfer of data, ARM judges call wireless telecommunications GPRS module and complete later transfer of data by communication mode;
After the connection of wire communication TCP/IP module disconnection network reaches certain hour interval, communication mode is set to wire communication TCP/IP pattern; Poll enter next time communication mode time call wire communication TCP/IP module, check whether this module recovers normal communication, if recover normal, continue with these module transfer data; If this module is abnormal, communication mode is set to wireless telecommunications GPRS pattern, continues with wireless telecommunications GPRS module transmission data.
5. the method for switching controls is carried out in utilization according to claim 4 based on the wired of microcontroller and wireless handover control system, it is characterized in that the concrete steps of described method for handover control are:
Step 1: corresponding initialization operation is carried out to microcontroller ARM,
Initialize Timer, for judging in communication process that retransmitting time-out provides timing services with timing time-out,
Retransmit time-out for judging whether wire communication TCP/IP has disconnected network and connected; Whether timing time-out is used for regularly patrolling and examining wire communication TCP/IP and has recovered to connect; Initiating communications pattern is wire communication TCP/IP pattern;
Step 2: initialization is carried out to wire communication TCP/IP module, corresponding pin configuration, enable setting, the network informations such as configuration of IP address;
Step 3: initialization is carried out to wireless telecommunications GPRS module, corresponding pin configuration, enable setting, serial ports initialization;
Step 4: judge Current communications pattern; If wire communication TCP/IP pattern, then enter step 5; If wireless telecommunications GPRS pattern, then enter step 11;
Step 5: judge whether wireless telecommunications GPRS opens,
If open, enter step 6; Do not open, enter step 7;
Step 6: close wireless telecommunications GPRS, enter step 7;
Step 7: carry out transfer of data by wire communication TCP/IP, enter step 8;
Step 8: judge that whether transmission is successful, whether network connects normal; If normal, then enter 4; Abnormal, then enter step 9;
Step 9: judge that whether repeating transmission is overtime; If time-out, then do not enter step 4; Retransmit time-out and then enter step 10;
Step 10: Current communications pattern is set to wireless telecommunications GPRS pattern; Enter step 4;
Step 11: judge whether wireless telecommunications GPRS opens; If do not open, enter step 12; Open and then enter step 13;
Step 12: open wireless communication GPRS; Enter step 13;
Step 13: carry out transfer of data by wireless telecommunications GPRS; Enter step 14;
Step 14: whether overtimely judge that wire communication TCP/IP interval is patrolled and examined in timing; If time-out, does not enter step 4; Time-out then enters step 15;
Step 15: Current communications pattern is set to wire communication TCP/IP pattern; Enter step 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510414619.1A CN105406972A (en) | 2015-07-15 | 2015-07-15 | Wired and wireless switching control system and switching control method based on microcontroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510414619.1A CN105406972A (en) | 2015-07-15 | 2015-07-15 | Wired and wireless switching control system and switching control method based on microcontroller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105406972A true CN105406972A (en) | 2016-03-16 |
Family
ID=55472236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510414619.1A Pending CN105406972A (en) | 2015-07-15 | 2015-07-15 | Wired and wireless switching control system and switching control method based on microcontroller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105406972A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808523A (en) * | 2017-11-15 | 2018-03-16 | 西安艾润物联网技术服务有限责任公司 | Detection means and its detection method, computer-readable recording medium |
| CN111124034A (en) * | 2019-11-28 | 2020-05-08 | 中国航空工业集团公司西安航空计算技术研究所 | Time sequence control method using time processing unit |
| CN111885644A (en) * | 2020-06-16 | 2020-11-03 | 太原市高远时代科技有限公司 | Automatic switching method for wired network and wireless network |
| CN113643465A (en) * | 2021-06-23 | 2021-11-12 | 广东履安实业有限公司 | Intelligent controller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812342A (en) * | 2006-01-23 | 2006-08-02 | 北京朗通环球科技有限公司 | Link backup method and apparatus for computer network |
| US20080165723A1 (en) * | 2007-01-05 | 2008-07-10 | Samsung Electronics Co., Ltd | Apparatus and method for reducing latency in the transmission control protocol layer of a portable communication terminal |
| CN201928289U (en) * | 2010-07-30 | 2011-08-10 | 天津赛思科技发展有限公司 | Output controller device for railway passenger transport broadcasting system |
| CN202816124U (en) * | 2012-08-01 | 2013-03-20 | 大连易联科信息技术有限公司 | Concentrator for power line carrier communication |
| CN205283567U (en) * | 2015-07-15 | 2016-06-01 | 浙江骐远智能科技有限公司 | Wired and wireless switching control system based on microcontroller |
-
2015
- 2015-07-15 CN CN201510414619.1A patent/CN105406972A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812342A (en) * | 2006-01-23 | 2006-08-02 | 北京朗通环球科技有限公司 | Link backup method and apparatus for computer network |
| US20080165723A1 (en) * | 2007-01-05 | 2008-07-10 | Samsung Electronics Co., Ltd | Apparatus and method for reducing latency in the transmission control protocol layer of a portable communication terminal |
| CN201928289U (en) * | 2010-07-30 | 2011-08-10 | 天津赛思科技发展有限公司 | Output controller device for railway passenger transport broadcasting system |
| CN202816124U (en) * | 2012-08-01 | 2013-03-20 | 大连易联科信息技术有限公司 | Concentrator for power line carrier communication |
| CN205283567U (en) * | 2015-07-15 | 2016-06-01 | 浙江骐远智能科技有限公司 | Wired and wireless switching control system based on microcontroller |
Non-Patent Citations (1)
| Title |
|---|
| 张逸 等: "3G技术在电能质量检测***中的应用", 《电力***保护与控制》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808523A (en) * | 2017-11-15 | 2018-03-16 | 西安艾润物联网技术服务有限责任公司 | Detection means and its detection method, computer-readable recording medium |
| CN111124034A (en) * | 2019-11-28 | 2020-05-08 | 中国航空工业集团公司西安航空计算技术研究所 | Time sequence control method using time processing unit |
| CN111885644A (en) * | 2020-06-16 | 2020-11-03 | 太原市高远时代科技有限公司 | Automatic switching method for wired network and wireless network |
| CN113643465A (en) * | 2021-06-23 | 2021-11-12 | 广东履安实业有限公司 | Intelligent controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100466794C (en) | System and method for realizing antenna equipment central managing | |
| CN105406972A (en) | Wired and wireless switching control system and switching control method based on microcontroller | |
| CN103067960B (en) | Indoor distribution system antenna feeder monitoring method | |
| CN105592439A (en) | Terminal and communication method | |
| CN205283567U (en) | Wired and wireless switching control system based on microcontroller | |
| CN107872250B (en) | A kind of communication module and its communication means that electric system public affairs private network is general | |
| CN112491842B (en) | Multi-protocol Internet of things gateway for smart construction site | |
| CN111245710A (en) | Intelligent gateway based on LoRa and data communication management method thereof | |
| CN107241274B (en) | Internet of things integrated service wireless router and system | |
| CN102682586A (en) | Transmission line state monitoring communication system | |
| CN105871614A (en) | Protection method and device of board cards in communication device | |
| CN112333797A (en) | Intelligent switching system and method for terminal communication card operator based on eSIM technology | |
| CN102573109B (en) | Wireless data transmission method, device and system based on code division multiple access (CDMA) or general packet radio service (GPRS) wireless public network | |
| CN101902769B (en) | Single board wireless debugging method and device | |
| CN103856411A (en) | Switching system connected with UART interface of router | |
| CN105977925B (en) | A kind of adaptive bus protection implementation method that should have main frame and off host pattern | |
| CN100366013C (en) | Accident power-off remote transmitting alarming system and alarming method thereof | |
| CN207348674U (en) | A kind of door machine control system based on technology of Internet of things | |
| CN208112977U (en) | A kind of mobile SIM card pond and mobile SIM card cell system | |
| CN111083687A (en) | Dual-mode airborne satellite communication modulation-demodulation terminal | |
| CN205883238U (en) | Revolving stage and relay system in multi -link | |
| CN203275993U (en) | Control system of electric equipment | |
| CN101877787A (en) | Video wireless transmission monitoring system and method based on 3G (The 3rd Generation) network | |
| CN101888649B (en) | Serial interface communication testing system | |
| CN203537563U (en) | Multi-mode wireless communication terminal used for testing electrical network communication quality of service (QoS) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160316 |