CN108923539A - Distribution based on GSM is far standby to throw communication device - Google Patents
Distribution based on GSM is far standby to throw communication device Download PDFInfo
- Publication number
- CN108923539A CN108923539A CN201810878238.2A CN201810878238A CN108923539A CN 108923539 A CN108923539 A CN 108923539A CN 201810878238 A CN201810878238 A CN 201810878238A CN 108923539 A CN108923539 A CN 108923539A
- Authority
- CN
- China
- Prior art keywords
- gsm
- module
- interface circuit
- capacitor
- power
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 37
- 230000010354 integration Effects 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
-
- H02J13/0075—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Computer Security & Cryptography (AREA)
- Power Engineering (AREA)
- Telephonic Communication Services (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of far standby throwing communication devices of distribution based on GSM, including master controller, information receiver, the power module being connected with master controller, sensor module, GSM integration module；The sensor module mainly includes the sensor being mounted on the remote spare power of distribution switching station, information collecting device；The interface circuit that the input terminal of the GSM integration module is connect with master controller mainly includes power interface circuit, control interface, data interface circuit；The output end link information receiving module of the GSM integration module.Through the above way, the present invention can be realized the cooperation between the remote spare power of distribution, information receiver is sent information to by GSM network simultaneously, the real-time grasp to prepared auto restart action situation may be implemented, timely processing can be made when encountering problems, workload is reduced, it is horizontal to promote distribution management.
Description
Technical field
The present invention relates to distribution Remote BZT equipment fields, more particularly to a kind of matching based on GSM
Net is far standby to throw communication device.
Background technique
GSM is the abbreviation of Global System For Mobile Communications, by European Telecommunications Standards Organization
The digital mobile communication standard that ETSI is worked out, GSM is global system for mobile communications (Global System for
Mobilecommunications abbreviation).GSM is the most commonly used mobile phone standard of current application.The whole world is more than 200
Countries and regions are more than that GSM phone is used in 1,000,000,000 people.
With the development of mobile communication technology, GSM network oneself through developing into very mature cordless communication network, by
Step ground is applied to monitoring field.It is a kind of effective method using GSM network as the information transmission platform of remote monitoring system,
Its principle is simple, and level security is high, does not need to set up dedicated network and safeguards network, and GSM network broad covered area, therefore with
Traditional monitoring system, which is compared, its unique advantage.
But existing distribution switching station far standby throw does not use gsm module in communication system, when prepared auto restart acts in the distance,
It cannot be communicated in time between prepared auto restart, and equipment person liable cannot understand prepared auto restart action situation at the first time, to the pipe of distribution
Reason brings serious inconvenience.
Therefore it is solved the above problems it is urgent to provide a kind of based on the far standby throwing communication device of the distribution of GSM, passes through hardware knot
Structure builds a kind of communication device to realize the timely communication between prepared auto restart and the first time of prepared auto restart action situation
Solution.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of far standby throwing communication device of distribution based on GSM, Neng Goushi
The real-time grasp of cooperation and its action situation between the existing remote spare power of distribution.
In order to solve the above technical problems, one technical scheme adopted by the invention is that：It is remote to provide a kind of distribution based on GSM
It is standby to throw communication device, including master controller, information receiver, the power module being connected with master controller, sensor module,
GSM integration module；
The sensor module mainly includes the sensor being mounted on the remote spare power of distribution switching station, information collection dress
It sets；
The interface circuit that the input terminal of the GSM integration module is connect with master controller mainly include power interface circuit,
Control interface, data interface circuit；The output end link information receiving module of the GSM integration module.
In a preferred embodiment of the present invention, the information receiver uses mobile terminal or/and monitoring host computer, uses
In the far standby action situation thrown of the distribution that real-time reception GSM network is sent.
In a preferred embodiment of the present invention, the power module includes solar storage battery and solar storage battery
Connected A/D converter circuit.Passing through A/D converter circuit using solar storage battery is the power supply of entire communication device.
In a preferred embodiment of the present invention, the GSM integration module includes gsm module, data encryption module, data
Log module.
In a preferred embodiment of the present invention, the power interface circuit provides 5V power supply for GSM integration module, packet
Include electrolytic capacitor EC2, EC3, capacitor C8-C10, diode D4, power interface J5, electrolytic capacitor EC2, capacitor C10, capacitor C8,
Electrolytic capacitor EC3, capacitor C9 are successively connected in parallel between the first pin of power interface J5 and third pin respectively, diode D4's
Anode connect with one end of capacitor C8, one end of cathode and electrolytic capacitor EC3 connect, one end of electrolytic capacitor EC2 and VCC company
It connects, one end of capacitor C9 is connect with VDD.
In a preferred embodiment of the present invention, the data communication interface circuit mainly includes resistance R7-R10, pressure stabilizing
Pipe D3, Schmidt trigger U1C, resistance R9, R10, the anode of voltage-stabiliser tube D3 are in parallel with the input terminal of Schmidt trigger U1C,
The other end of R9 is connect with master controller, and the output end of Schmidt trigger U1C is connect with resistance R8, and one end of R7 and R8's is another
One end is in parallel.
The beneficial effects of the invention are as follows：The present invention by the way that sensor and information collecting device are arranged on remote spare power,
It can rapidly realize the acquisition of the sampling quantities such as the acquisition of position of the switch information and electric current, voltage, the time of backup auto-activating device；
By GSM integration module, encrypted information rapidly can be sent to the far standby GSM for throwing communication device of another distribution
Integration module realizes the cooperation between far standby throwing；Information receiver, Ke Yishi are sent information to by GSM network simultaneously
Now to the real-time grasp of prepared auto restart action situation, timely processing can be made when encountering problems, reduces workload, promoted and matched network management
Reason is horizontal.The configuration of the present invention is simple, it is easy to accomplish, it has a good application prospect.
Detailed description of the invention
Fig. 1 is that the present invention is based on the far standby functional block diagrams for throwing one preferred embodiment of communication device of the distribution of GSM；
Fig. 2 is the structural block diagram that the master controller is connect with gsm module；
Fig. 3 is the circuit diagram of the power interface circuit；
Fig. 4 is the circuit diagram of the control interface；
Fig. 5 is the circuit diagram of the data communication interface circuit.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes：
A kind of distribution based on GSM is far standby to throw communication device, including master controller, information receiver and master controller
The output end link information of connected power module, sensor module, GSM integration module, the GSM integration module receives mould
Block.
The sensor module mainly includes the sensor being mounted on the remote spare power of distribution switching station, information collection dress
It sets, for rapidly realizing adopting for the sampling quantities such as the acquisition of position of the switch information and the electric current of backup auto-activating device, voltage, time
Collection.
Above-mentioned distribution switching station refers to that the switchgear with multiple distribution lines, remote spare power refer to that a distant place is spare
Power supply automatic throw-in equipment.
The information receiver uses mobile terminal or/and monitoring host computer, matches for what real-time reception GSM network was sent
The far standby action situation thrown of net.As shown in Figure 1, remote by realization two, GSM net between the communication device A and communication device B
The real-time grasp of cooperation and its action situation between standby throwing.
The A/D converter circuit that the power module includes solar storage battery, is connected with solar storage battery, utilizes the sun
Energy storage device is the power supply of entire communication device by A/D converter circuit.
Single-chip microcontroller or monitoring host computer can be used in the master controller, the control core as the communication device.
The GSM integration module includes gsm module, data encryption module, data log module.The data encryption module
It is encrypted for transmission data, the data log module is used for record memory device action message, is conveniently used for inquiring.
In one embodiment, TC35i module can be used in the gsm module, which is that Siemens Company releases a kind of radio communication mold
Block integrates radio circuit, base band, provides a user the AT command interface of standard, is data, voice, short message and fax
Quickly, reliable, safe transmission is provided, the exploitation design and application of user are facilitated.TC35i module application interface is using 40 feet
Zip socket, has comprising pin function：3.3-5.5V, the dc power interface that peak value is 2A, analog audio input, output connect
Mouthful, the standard RS232 signaling interface of 8 pins, 6 pins meet the SIM card connection of GSM11.11 standard, control interface.
In conjunction with Fig. 2, for the flexibility for increasing system, gsm module is directly deducted a part of pay 5V power supply power supply inside device by Zhu, master control
Device and gsm module processed complete communication by RxD, TxD and three line of ground wire of serial communication, DTR the and RTS interface of serial communication with
The control interface of gsm module connects, and realizes control and exchange that master controller transmits data.The input terminal of the gsm module
The interface circuit connecting with master controller mainly includes power interface circuit, control interface, data interface circuit, below it is right
Each circuit is described in detail：
Referring to Fig. 3, the power interface circuit provides 5V power supply for gsm module comprising electrolytic capacitor EC2, EC3,
Capacitor C8-C10, diode D4, power interface J5, electrolytic capacitor EC2, capacitor C10, capacitor C8, electrolytic capacitor EC3, capacitor C9
It is successively connected in parallel between the first pin of power interface J5 and third pin respectively, one end of the anode and capacitor C8 of diode D4
One end of connection, cathode and electrolytic capacitor EC3 connects, and one end of electrolytic capacitor EC2 is connect with VCC, one end of capacitor C9 and VDD
Connection.The operating voltage of TC35i module is 3.3-5V, and stable operating voltage is 4.4V or so, in starting connection logging in network
In transmission process, it is necessary to which a possibility that considering voltage decline guarantees that minimum voltage is higher than 4V.Master controller DC output voltage is logical
Comparison circuit to be crossed to be compared with reference voltage, error voltage adjusts DC output voltage by on/off time scale control circuit,
Line filter (electrolytic capacitor EC2) prevents AC signal noise inputs, the feedback noise for inhibiting power source internal to generate.
Referring to Fig. 4, the control interface is controlled respectively using DTR the and RTS signal wire of master controller serial communication
The IGT ignition lead and EMERG0FF of TC35i module processed forcibly close line, realize the starting to gsm module and close control.Starting
It when TC35i module, is worked normally after TC35i module need to be made to power on 10ms, master controller start-up course DTR pin and RTS pin
There are the fluctuations of an about 4s or so, and to filter out the fluctuation, the control interface is touched using RC delay circuit and Schmidt
Hair device filters out the fluctuation signal, mainly includes resistance R1, R2, R4, diode D1, triode T1, T2, capacitor C1, Schmidt
Trigger U1F, R1 and C1 form RC delay circuit, and one end of C1 is connect with power supply VCC, the collector and emitter of triode T1
It is connected in parallel on the both ends of R1, the anode of base stage and diode D1 and R2 connection, the cathode of D1 and one end of C1 connect, triode T2's
Base stage connect by R4 with the output end of Schmidt trigger U1F, emitter is grounded, the input terminal of Schmidt trigger U1F and
Resistance R1 connection.
Referring to Fig. 5, the data communication interface circuit mainly includes resistance R7-R10, voltage-stabiliser tube D3, schmidt trigger
Positive, the other end of R9 and the master control in parallel with the input terminal of Schmidt trigger U1C of device U1C, resistance R9, R10, voltage-stabiliser tube D3
Device connection processed, the output end of Schmidt trigger U1C are connect with resistance R8, and one end of R7 and the other end of R8 are in parallel.The number
Receiving short message and PC communication function are completed according to communication interface circuit, TC35i module and master controller serial port use three-wire system
Data exchange is carried out, because the RS232 interface of master controller and the level specification of TC35i module serial line interface are different, which makes
RxD and TxD level conversion is realized with simple Schmidt trigger, voltage-stabiliser tube and resistance.
The present invention can rapidly realize switch position by the way that sensor and information collecting device are arranged on remote spare power
The acquisition of the sampling quantities such as electric current, voltage, the time of acquisition and backup auto-activating device that confidence ceases；It, can by GSM integration module
Encrypted information is rapidly sent to the far standby GSM integration module for throwing communication device of another distribution, realizes far standby throw
Between cooperation；Information receiver is sent information to by GSM network simultaneously, may be implemented to prepared auto restart action situation
It grasps in real time, timely processing can be made when encountering problems, reduce workload, it is horizontal to promote distribution management.Structure of the invention letter
It is single, it is easy to accomplish, it has a good application prospect.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of distribution based on GSM is far standby to throw communication device, which is characterized in that including master controller, information receiver, with
The connected power module of master controller, sensor module, GSM integration module；
The sensor module mainly includes the sensor being mounted on the remote spare power of distribution switching station, information collecting device；
The interface circuit that the input terminal of the GSM integration module is connect with master controller mainly includes power interface circuit, control
Interface circuit, data interface circuit；The output end link information receiving module of the GSM integration module.
2. the distribution according to claim 1 based on GSM is far standby to throw communication device, which is characterized in that the information receives
Device uses mobile terminal or/and monitoring host computer.
3. the distribution according to claim 1 based on GSM is far standby to throw communication device, which is characterized in that the power module
Including solar storage battery, the A/D converter circuit being connected with solar storage battery.
4. the distribution according to claim 1 based on GSM is far standby to throw communication device, which is characterized in that the comprehensive mould of the GSM
Block includes gsm module, data encryption module, data log module.
5. the distribution according to claim 1 based on GSM is far standby to throw communication device, which is characterized in that the power interface
Circuit provides 5V power supply for GSM integration module comprising electrolytic capacitor EC2, EC3, capacitor C8-C10, diode D4, power supply connect
Mouth J5, electrolytic capacitor EC2, capacitor C10, capacitor C8, electrolytic capacitor EC3, capacitor C9 are successively connected in parallel on power interface J5's respectively
Between first pin and third pin, the anode of diode D4 connect with one end of capacitor C8, cathode and electrolytic capacitor EC3 one
End connection, one end of electrolytic capacitor EC2 are connect with VCC, and one end of capacitor C9 is connect with VDD.
6. the distribution according to claim 1 based on GSM is far standby to throw communication device, which is characterized in that the data communication
Interface circuit mainly includes resistance R7-R10, voltage-stabiliser tube D3, Schmidt trigger U1C, and resistance R9, R10, voltage-stabiliser tube D3 are just
Pole is in parallel with the input terminal of Schmidt trigger U1C, and the other end of R9 is connect with master controller, and Schmidt trigger U1C's is defeated
Outlet is connect with resistance R8, and one end of R7 and the other end of R8 are in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810878238.2A CN108923539B (en) | 2018-08-03 | GSM-based distribution network remote standby switching communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810878238.2A CN108923539B (en) | 2018-08-03 | GSM-based distribution network remote standby switching communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108923539A true CN108923539A (en) | 2018-11-30 |
| CN108923539B CN108923539B (en) | 2024-06-07 |
Family
ID=
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201026806Y (en) * | 2007-01-26 | 2008-02-27 | 山西六合华鼎科贸有限公司 | System for long-range control or failure process of railway electric power through and self-closing circuit GPRS or CDMA |
| CN103545797A (en) * | 2013-10-10 | 2014-01-29 | 国家电网公司 | Distribution network area protecting and self-healing system |
| US20150311721A1 (en) * | 2012-12-07 | 2015-10-29 | Nuevo Power, Inc. | Remote access, control, and management of a power micro grid |
| CN105119375A (en) * | 2015-09-07 | 2015-12-02 | 国网辽宁省电力有限公司鞍山供电公司 | Carrier technology-based inter-substation area tie line backup power automatic switching communication system |
| US20160006300A1 (en) * | 2014-07-02 | 2016-01-07 | Schneider Electric Industries Sas | Remote terminal unit modular equipment |
| CN106410961A (en) * | 2016-08-25 | 2017-02-15 | 成都汉度科技有限公司 | Smart distribution network device monitoring method |
| CN107171431A (en) * | 2017-06-29 | 2017-09-15 | 国网山东省电力公司淄博供电公司 | Tune electric equipment free of discontinuities, system and control method |
| CN208369316U (en) * | 2018-08-03 | 2019-01-11 | 国家电网有限公司 | Distribution based on GSM is far standby to throw communication device |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201026806Y (en) * | 2007-01-26 | 2008-02-27 | 山西六合华鼎科贸有限公司 | System for long-range control or failure process of railway electric power through and self-closing circuit GPRS or CDMA |
| US20150311721A1 (en) * | 2012-12-07 | 2015-10-29 | Nuevo Power, Inc. | Remote access, control, and management of a power micro grid |
| CN103545797A (en) * | 2013-10-10 | 2014-01-29 | 国家电网公司 | Distribution network area protecting and self-healing system |
| US20160006300A1 (en) * | 2014-07-02 | 2016-01-07 | Schneider Electric Industries Sas | Remote terminal unit modular equipment |
| CN105119375A (en) * | 2015-09-07 | 2015-12-02 | 国网辽宁省电力有限公司鞍山供电公司 | Carrier technology-based inter-substation area tie line backup power automatic switching communication system |
| CN106410961A (en) * | 2016-08-25 | 2017-02-15 | 成都汉度科技有限公司 | Smart distribution network device monitoring method |
| CN107171431A (en) * | 2017-06-29 | 2017-09-15 | 国网山东省电力公司淄博供电公司 | Tune electric equipment free of discontinuities, system and control method |
| CN208369316U (en) * | 2018-08-03 | 2019-01-11 | 国家电网有限公司 | Distribution based on GSM is far standby to throw communication device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203251317U (en) | A smart home monitoring system using Bluetooth low-energy BLE modules | |
| WO2012113219A1 (en) | Method and device for controlling operating mode of household electrical appliance, and intelligent household electrical appliance controller | |
| CN104464103B (en) | STS (standard transfer specification) split electricity meter based on low-power-consumption carrier communication mode | |
| CN108734840A (en) | A kind of access control system and its control method | |
| CN202677599U (en) | Self-adapting watt-hour meter collector | |
| CN103298152B (en) | Based on bus type many illumination collector of wireless telecommunications | |
| CN207676146U (en) | A kind of intelligent socket hardware system | |
| CN208369316U (en) | Distribution based on GSM is far standby to throw communication device | |
| CN205176507U (en) | Smart home systems based on zigbee | |
| CN108923539A (en) | Distribution based on GSM is far standby to throw communication device | |
| CN206907214U (en) | Collector | |
| CN206562234U (en) | A kind of terraced control system that can be controlled with mobile terminal | |
| CN208538219U (en) | A kind of access control system | |
| CN201608905U (en) | Communication network monitoring device | |
| CN209087129U (en) | A kind of unified conversion circuit based on RS485 | |
| CN108923539B (en) | GSM-based distribution network remote standby switching communication device | |
| CN207637292U (en) | A kind of kilowatt meter reading-out system | |
| CN204392247U (en) | A kind of repeater | |
| CN201066904Y (en) | Interface communication circuit with anti-interference capability and mobile phone applying this circuit | |
| CN112153492A (en) | Electric energy acquisition terminal wireless signal gain device | |
| CN206283519U (en) | A kind of control device of wireless | |
| CN206389392U (en) | A kind of home energy source router | |
| CN102315861A (en) | Programmable communication unit based on coaxial cable access | |
| CN205081807U (en) | Intelligence home gateway based on zigbee and GPRS | |
| CN216216886U (en) | Dual-mode power line carrier communication device based on Bluetooth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |