CN107424402A - The carrier module that can be communicated with external equipment - Google Patents

The carrier module that can be communicated with external equipment Download PDF

Info

Publication number
CN107424402A
CN107424402A CN201710823463.1A CN201710823463A CN107424402A CN 107424402 A CN107424402 A CN 107424402A CN 201710823463 A CN201710823463 A CN 201710823463A CN 107424402 A CN107424402 A CN 107424402A
Authority
CN
China
Prior art keywords
carrier
communicated
external equipment
module
data
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
Application number
CN201710823463.1A
Other languages
Chinese (zh)
Inventor
钟方强
熊志明
徐晓安
梁建辉
周军
严建敏
秦超
丁小勇
杜定泉
张奇柄
朱宏伟
杨江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yichuan Power Supply Branch Of Guo Wang Jiangxi Electric Power Corp
HANGZHOU QIANLONG ELECTRIC CO Ltd
Original Assignee
Yichuan Power Supply Branch Of Guo Wang Jiangxi Electric Power Corp
HANGZHOU QIANLONG ELECTRIC CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yichuan Power Supply Branch Of Guo Wang Jiangxi Electric Power Corp, HANGZHOU QIANLONG ELECTRIC CO Ltd filed Critical Yichuan Power Supply Branch Of Guo Wang Jiangxi Electric Power Corp
Priority to CN201710823463.1A priority Critical patent/CN107424402A/en
Publication of CN107424402A publication Critical patent/CN107424402A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

The invention provides a kind of carrier module that can be communicated with external equipment, the carrier module includes standard carrier module and carrier wave expansion module, the standard carrier module couples ammeter, and the carrier wave expansion module includes：TTL communication interface circuits, ammeter is coupled, for being communicated with ammeter；RS485 communication interface circuits, external equipment is coupled, for being communicated with external equipment；Microcontroller, couple the standard carrier module and ammeter, for obtaining the carrier communication signal by ammeter, and the carrier communication signal is differentiated, communicated according to differentiation result selection TTL communication interface circuits or RS485 communication interface circuits and its corresponding ammeter or external equipment.The present invention makes carrier module to be communicated to electric supply meter, while also realize the function of being communicated to other external equipments by increasing carrier wave expansion module on the basis of original standard carrier module.

Description

The carrier module that can be communicated with external equipment
Technical field
The present invention relates to carrier module technical field, more particularly to a kind of carrier module that can be communicated with external equipment.
Background technology
At present, in low-voltage collecting meter reading system, terminal device of the carrier module as acquisition system, only final stage user is electric A part on table, therefore its function is single, can only individually be communicated with electric supply meter, it is impossible to while it is used as other equipment Communication Monitoring.However as the development of intelligent grid, the popularization of the intelligent power distribution equipment of user terminal, the communication to these equipment Monitoring requirements increasingly increase, therefore research and develop a kind of communication apparatus and can carry out communication to plurality of devices simultaneously and have higher economic valency Value and social value.
The content of the invention
The present invention provides a kind of carrier module that can be communicated with external equipment, by changing to the technology of existing carrier module Enter, increase carrier wave expansion module on the basis of original standard carrier module, carrier module is led to electric supply meter News, while the function of being communicated to other external equipments is also realized, realize and low-voltage intelligent power network is completed with simplest equipment Construction.
To solve the above problems, the embodiment of the present invention provides a kind of carrier module that can be communicated with external equipment, including mark Quasi- carrier module and carrier wave expansion module, the standard carrier module couples ammeter, the carrier wave expansion module include：
TTL communication interface circuits, ammeter is coupled, for being communicated with ammeter；
RS485 communication interface circuits, external equipment is coupled, for being communicated with external equipment；
Microcontroller, the standard carrier module and ammeter are coupled, for obtaining carrier communication signal, and to the carrier wave Communication signal differentiated, according to differentiating result selection TTL communication interface circuits or RS485 communication interface circuits and its corresponding Ammeter or external equipment communicated.
As a kind of embodiment, the RS485 communication interface circuits include connecing with the data of micro controller data transmission Receiving end and data sending terminal, the data receiver and data sending terminal are provided with photoisolator.
As a kind of embodiment, the microcontroller includes the first discrimination module, and first discrimination module is used to hold Row following step：
Obtain electric meter address and preserve the electric meter address；
Obtain carrier communication signal and parse the address date in carrier communication signal；
By the address date of carrier communication signal compared with the electric meter address data preserved；
If address date is identical, data category judgement is carried out to carrier communication signal；
If address date is different, the carrier communication signal is abandoned, waits next group of carrier communication signal.
As a kind of embodiment, the microcontroller includes the second discrimination module, and second discrimination module is used to hold Row following step：
Obtain carrier communication signal and parse and obtain Data Identification；
Data Identification is differentiated；
If Data Identification identifies for ammeter data, control TTL communication interface circuits are communicated with ammeter；
If Data Identification identifies for external equipment, control RS485 communication interface circuits are communicated with external equipment.
As a kind of embodiment, in addition to：
Isolate authigenic power supply, for individually being powered to modules；
DC-DC power source conversion module, external power source is coupled, for outer power voltage to be changed.
As a kind of embodiment, the RS485 communication interface circuits also include the first light isolation device, second optically isolated Device, RS485 chips, transient state killer tube and protection PTC resistor, the first light isolation device, the second light isolation device, transient state suppression Tubulation and protection PTC resistor couple the RS485 chips；First light isolation device is located at the data receiver, Second light isolation device is located at the data sending terminal, and the RS485 also includes the communication with external equipment data transfer End, the transient state killer tube and the protection PTC resistor are located at the communication terminal.
As a kind of embodiment, the isolation authigenic power supply includes：
ON-OFF control circuit, including switching tube, switching tube on or off in the presence of control signal；
Conversion transformer, external power and the switching tube are coupled, be conducting to cut-off in switching tube or turn by the end of conducting Change among process, induced electromotive force is produced in the secondary of conversion transformer；
Clamp circuit, conversion transformer is coupled, opened for being not higher than induced electromotive force caused by conversion transformer primary side Close the withstanding voltage of pipe；
Current rectifying and wave filtering circuit, the conversion transformer is coupled, for being carried out to induced electromotive force caused by conversion transformer Arrange and filter and export DC voltage.
As a kind of embodiment, the clamp circuit includes electric capacity, diode and resistance, and resistance is in parallel with electric capacity, and two The connecting node of the positive pole coupling switching tube of pole pipe, negative pole coupling capacitance and resistance.
The present invention is compared to the beneficial effect of prior art：By in original standard carrier module basis, increasing Add microcontroller design, the communication data of original carrier module is analyzed, if the communication data of ammeter class, just directly Communicated with the mode and ammeter of Transistor-Transistor Logic level, if to the communication data of external equipment, then pass through RS485 communication side Formula communicates to these peripheral hardwares.In view of the electrical security externally communicated, the hardware components that carrier module externally communicates are also With isolation features, i.e. RS485 communication interface electricity of the communication part with independent isolation authigenic power supply and with isolation effect Road, communication part is set to be completely independent in electric property, so that the carrier module realizes higher electrical safety performance.
Brief description of the drawings
Fig. 1 is the principle assumption diagram of the carrier module of the present invention；
Fig. 2 is the module connection figure of the carrier module of the present invention；
Fig. 3 is the circuit diagram of the TTL communication interface circuits of the carrier module of the present invention；
Fig. 4 is the circuit diagram of the RS485 communication interface circuits of the carrier module of the present invention；
Fig. 5 is the circuit diagram of the isolation authigenic power supply of the carrier module of the present invention；
Fig. 6 is the circuit diagram of the DC-DC power source conversion module of the carrier module of the present invention；
Fig. 7 is the circuit diagram of the microcontroller of the carrier module of the present invention.
Accompanying drawing marks：1st, standard carrier module；2nd, carrier wave expansion module；21st, TTL communication interface circuits；22nd, RS485 leads to Communication interface circuit；23rd, microcontroller；3rd, authigenic power supply is isolated；4th, DC-DC power source conversion module.
Embodiment
Below in conjunction with accompanying drawing, the technical characteristic above-mentioned and other to the present invention and advantage are clearly and completely described, Obviously, described embodiment is only the section Example of the present invention, rather than whole embodiments.
As shown in fig. 1, a kind of carrier module that can be communicated with external equipment, including standard carrier module 1 and carrier wave extension Module 2, a special carrier module, carrier module insertion standard are formed by standard carrier module 1 and carrier wave expansion module 2 Electric supply meter interface on, communicated by TTL communication interface circuits 21 with electric supply meter, while the extension of the carrier module RS485 communication interface circuits 22 are connected on external equipment, can be connected 1 peripheral hardware according to using difference, can also be connected more Platform peripheral hardware.Carrier module is connected by ammeter with low-voltage power line, and such carrier module can be by low-voltage power line, using load The mode and upper management device talk of ripple communication, and read the data of ammeter and peripheral hardware as needed, or control ammeter and Peripheral hardware, realize the intelligent management to ammeter and peripheral hardware.
As shown in Figures 2 and 3, carrier module of the invention specifically includes electric supply meter interface J1, standard carrier module 1, carried Ripple expansion module 2, isolation authigenic power supply 3 and DC-DC power source conversion module 4, wherein, electric supply meter interface and low-voltage power supply line Road connects, while provides carrier wave forceful electric power interface and light current communication interface and low-voltage DC source interface ,+12V the ports of the interface Connection isolation authigenic power supply 3 and DC-DC power source conversion module 4.Wherein, carrier module include TTL communication interface circuits 21, RS485 communication interface circuits 22 and microcontroller 23.
As shown in figure 3, standard carrier module 1 includes interface J3 and resistance R9~resistance R11.TTL communication interface circuits 21 Including resistance R2~resistance R6, resistance R4 both ends are respectively coupled to electric supply meter interface J1 the 8th pin and microcontroller 23 PA0/WKUP pins as METER_EVEV paths, resistance R5 both ends be respectively coupled to electric supply meter interface J1 the 5th pin and The PA3/USART2_RX pins of microcontroller 23 are respectively coupled to electric supply meter and connect as METER_RXD paths, resistance R6 both ends Mouth J1 the 2nd pin and the PA2/USART2_TX pins of microcontroller 23 are as METER_TXD paths, resistance R2 and resistance R3 For METER_RXD paths and the pull-up resistor of METER_TXD paths, resistance R2 one end coupling resistance R5 connects close to electric supply meter Mouth J1 sides, the output end of other end coupling DC-DC power source conversion module 4, resistance R3 one end coupling resistance R6 is close to user Ammeter interface J1 sides, the output end of other end coupling DC-DC power source conversion module 4.
As shown in figure 4, RS485 communication interface circuits 22 include the data receiver sum with the data transfer of microcontroller 23 Communication terminal according to transmitting terminal and with external equipment data transfer, specifically, RS485 communication interface circuits 22 include the first light every From device OP1, second light isolation device OP2, RS485 chip U4, transient state killer tube TVS_T and protection PTC resistor F1, first Light isolation device OP1 is located at data receiver, and data receiver is RS485 data acquisition channel, the first light isolation device OP1 Input coupling microcontroller 23 PA10/USART1_RX pins and pass through resistance R12 and couple DC-DC power source conversion module 4 Output end, the first light isolation device OP1 output end coupling RS485 chips and by resistance R13 couple COM 3.5V voltages Signal, the second light isolation device OP2 input couple the PA9/USART1_TX pins of microcontroller 23 and pass through resistance R19 Couple the output end of DC-DC power source conversion module 4, the second light isolation device OP2 output end be respectively coupled to RS485 chips and COM 3.5V voltage signals, transient state killer tube TVS_T and protection PTC resistor F1 are located at the communication with external equipment data transfer End, transient state killer tube TVS_T and RS485 chips are connected in parallel, and the VCC pin of RS485 chips is respectively coupled to protect PTC resistor F1, electric capacity C11 and COM 3.5V voltage signals, protection PTC resistor F1 output end coupling communication output interface J4.
As shown in figure 5, isolation authigenic power supply 3 includes ON-OFF control circuit, clamp circuit, conversion transformer and rectification filter Wave circuit, ON-OFF control circuit include switching tube, and switching tube Q1 control pole is used to receive pwm control signal, and switching tube Q1 exists On or off in the presence of pwm control signal；Clamp circuit couples ON-OFF control circuit, for producing conversion transformer primary side Raw induced electromotive force is not higher than the withstanding voltage of switching tube；Conversion transformer is conducting to cut-off or by the end of leading in switching tube Q1 Among logical transfer process, induced electromotive force is produced in the secondary of conversion transformer；Current rectifying and wave filtering circuit couples conversion transformer, For carrying out arranging filtering to induced electromotive force caused by conversion transformer and exporting COM 3.5V voltage signals.Wherein, clamper Circuit includes electric capacity C9, diode D2 and resistance R15, and resistance R15 is in parallel with electric capacity C11, and diode D2 positive pole coupling is opened Close pipe Q1, negative pole coupling capacitance C11 and resistance R15 connecting node.When switching tube Q1 is from the conversion for being conducting to cut-off, conversion Transformer T1 primary side can produce higher induced electromotive force, if this induced electromotive force exceedes switching tube Q1 withstanding voltages, meeting Switching tube Q1 is damaged, therefore the effect of clamp circuit is exactly to make conversion transformer when switching tube Q1 is from the conversion for being conducting to cut-off The induced electromotive force of T1 primary sides is not higher than switching tube Q1 withstanding voltages, so as to protection switch pipe Q1, and can be closed in switching tube Q1 When disconnected, afterflow vibration is eliminated.Wherein, electric capacity C11 and resistance R15 composition RC circuits, can reduce damped vibration.
As shown in fig. 6, DC-DC power source conversion module 4 is by DC-DC conversion chips U3, electric capacity C10, C15~18, resistance R16 ~resistance R18, diode D4 and inductance L1 the compositions ,+3.3V output ends connection microcontroller 23 of DC-DC power source conversion circuit With the power input of RS485 communication interface circuits 22.
As shown in fig. 7, microcontroller 23 includes chip U2, chip U2 periphery is additionally provided with by electric capacity C4, C5, crystal oscillator Y1 groups Into crystal oscillating circuit and the reset circuit that is made up of electric capacity C1, resistance R1, reset chip U1, reset circuit ensure microcontroller 23 reliable reset under upper electric or improper power conditions.
The inside of microcontroller 23 includes the first discrimination module and the second discrimination module, and the first discrimination module is following for performing Step：
S101：Obtain electric meter address and preserve the electric meter address；
S102：Obtain carrier communication signal and parse the address date in carrier communication signal；
S103：By the address date of carrier communication signal compared with the electric meter address data preserved；
S104：If address date is identical, data category judgement is carried out to carrier communication signal；
S105：If address date is different, the carrier communication signal is abandoned, waits next group of carrier communication signal.
Second discrimination module is used to perform following step：
S201：Obtain carrier communication signal and parse and obtain Data Identification；
S202：Data Identification is differentiated；
S203：If Data Identification identifies for ammeter data, control TTL communication interface circuits 21 are led to ammeter:
S204：If Data Identification identifies for external equipment, control RS485 communication interface circuits 22 are carried out with external equipment Communication.
During above-mentioned differentiation, step performed by the second discrimination module can be based on address used in the first discrimination module and judge The step of.
In the present embodiment, Data Identification is DI0~DI3 totally 4 bytes, is sentenced by this Data Identification to DI3 Not, if DI3 bytes are " A8 " characters, then it is assumed that the carrier communication signal is the communication data of external equipment, then is led to by RS485 Communication interface circuit 22 and external equipment communicate, if not " A8 " character, then by TTL communication interface circuits 21 directly and ammeter Communicated, can thus realize and be communicated with same carrier module and ammeter, while external equipment can also be communicated Dual-use function.
The present invention is by the way that on the basis of original standard carrier module 1, increase microcontroller 23 designs, to original carrier wave mould The communication data of block is analyzed, if the communication data of ammeter class, with regard to directly being led to the mode and ammeter of Transistor-Transistor Logic level These peripheral hardwares if to the communication data of external equipment, are then communicated by news by RS485 communication modes.Consider The electrical security externally communicated, the hardware components that carrier module externally communicates also have isolation features, i.e. communication part has Independent isolation authigenic power supply 3 and the RS485 communication interface circuits 22 with isolation effect, make communication part in electric property It is completely independent, so that the carrier module realizes higher electrical safety performance.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further Describe in detail, it will be appreciated that the foregoing is only the specific embodiment of the present invention, the protection being not intended to limit the present invention Scope.Particularly point out, to those skilled in the art, within the spirit and principles of the invention, that is done any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims (8)

1. a kind of carrier module that can be communicated with external equipment, it is characterised in that including standard carrier module and carrier wave expanded mode Block, the standard carrier module couples ammeter, the carrier wave expansion module include：
TTL communication interface circuits, ammeter is coupled, for being communicated with ammeter；
RS485 communication interface circuits, external equipment is coupled, for being communicated with external equipment；
Microcontroller, the standard carrier module and ammeter are coupled, for obtaining carrier communication signal, and to the carrier communication Signal is differentiated, according to differentiation result selection TTL communication interface circuits or RS485 communication interface circuits and its corresponding electricity Table or external equipment are communicated.
2. the carrier module according to claim 1 that can be communicated with external equipment, it is characterised in that the RS485 communications Interface circuit includes the data receiver and data sending terminal with micro controller data transmission, the data receiver and data hair Sending end is provided with photoisolator.
3. the carrier module according to claim 1 that can be communicated with external equipment, it is characterised in that the microcontroller bag The first discrimination module is included, first discrimination module is used to perform following step：
Obtain electric meter address and preserve the electric meter address；
Obtain carrier communication signal and parse the address date in carrier communication signal；
By the address date of carrier communication signal compared with the electric meter address data preserved；
If address date is identical, data category judgement is carried out to carrier communication signal；
If address date is different, the carrier communication signal is abandoned, waits next group of carrier communication signal.
4. the carrier module according to claim 1 that can be communicated with external equipment, it is characterised in that the microcontroller bag The second discrimination module is included, second discrimination module is used to perform following step：
Obtain carrier communication signal and parse and obtain Data Identification；
Data Identification is differentiated；
If Data Identification identifies for ammeter data, control TTL communication interface circuits are communicated with ammeter；
If Data Identification identifies for external equipment, control RS485 communication interface circuits are communicated with external equipment.
5. the carrier module according to claim 1 that can be communicated with external equipment, it is characterised in that also include：
Isolate authigenic power supply, for individually being powered to modules；
DC-DC power source conversion module, external power source is coupled, for outer power voltage to be changed.
6. the carrier module according to claim 2 that can be communicated with external equipment, it is characterised in that the RS485 communications Interface circuit also includes the first light isolation device, the second light isolation device, RS485 chips, transient state killer tube and protection PTC electricity Resistance, the first light isolation device, the second light isolation device, transient state killer tube and protection PTC resistor couple the RS485 cores Piece；First light isolation device is located at the data receiver, and second light isolation device is located at the data sending terminal, The RS485 also includes the communication terminal with external equipment data transfer, and the transient state killer tube and the protection PTC resistor are located at The communication terminal.
7. the carrier module according to claim 5 that can be communicated with external equipment, it is characterised in that the spontaneous electricity of isolation Source includes：
ON-OFF control circuit, including switching tube, switching tube on or off in the presence of control signal；
Conversion transformer, external power and the switching tube are coupled, cut-off is conducting to or by the end of the converted of conducting in switching tube Cheng Dangzhong, induced electromotive force is produced in the secondary of conversion transformer；
Clamp circuit, conversion transformer is coupled, for making induced electromotive force caused by conversion transformer primary side be not higher than switching tube Withstanding voltage；
Current rectifying and wave filtering circuit, the conversion transformer is coupled, for being arranged to induced electromotive force caused by conversion transformer Filter and export DC voltage.
8. the carrier module according to claim 7 that can be communicated with external equipment, it is characterised in that the clamp circuit bag Electric capacity, diode and resistance are included, resistance is in parallel with electric capacity, the positive pole coupling switching tube of diode, negative pole coupling capacitance and resistance Connecting node.
CN201710823463.1A 2017-09-13 2017-09-13 The carrier module that can be communicated with external equipment Pending CN107424402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710823463.1A CN107424402A (en) 2017-09-13 2017-09-13 The carrier module that can be communicated with external equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710823463.1A CN107424402A (en) 2017-09-13 2017-09-13 The carrier module that can be communicated with external equipment

Publications (1)

Publication Number Publication Date
CN107424402A true CN107424402A (en) 2017-12-01

Family

ID=60432353

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710823463.1A Pending CN107424402A (en) 2017-09-13 2017-09-13 The carrier module that can be communicated with external equipment

Country Status (1)

Country Link
CN (1) CN107424402A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108492544A (en) * 2018-04-08 2018-09-04 安特仪表集团有限公司 High speed carrier communication device and system
CN109682042A (en) * 2018-12-27 2019-04-26 哈尔滨研拓科技发展有限公司 A kind of electrical cabinet air-conditioner controller with industrial bus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102104399A (en) * 2011-01-16 2011-06-22 郭建国 System for ensuring power line carrier communications between energy meter gateways and white information appliances
CN102122163A (en) * 2011-01-13 2011-07-13 中国电力科学研究院 Residential electricity online monitoring system based on smart meter
CN102901851A (en) * 2011-07-25 2013-01-30 南京能瑞自动化设备股份有限公司 Single-phase remote-cost control intelligent ammeter with RS485 control signal output
CN204142835U (en) * 2014-08-06 2015-02-04 福建省农业机械化研究所 A kind of single-phase electric energy meter
CN106530672A (en) * 2016-12-29 2017-03-22 四川创能海博科技有限公司 Electricity consumption information acquisition query system, acquisition method and query method
CN206099797U (en) * 2016-08-31 2017-04-12 杭州乾龙电器有限公司 Spontaneous power supply circuit of isolated form

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102122163A (en) * 2011-01-13 2011-07-13 中国电力科学研究院 Residential electricity online monitoring system based on smart meter
CN102104399A (en) * 2011-01-16 2011-06-22 郭建国 System for ensuring power line carrier communications between energy meter gateways and white information appliances
CN102901851A (en) * 2011-07-25 2013-01-30 南京能瑞自动化设备股份有限公司 Single-phase remote-cost control intelligent ammeter with RS485 control signal output
CN204142835U (en) * 2014-08-06 2015-02-04 福建省农业机械化研究所 A kind of single-phase electric energy meter
CN206099797U (en) * 2016-08-31 2017-04-12 杭州乾龙电器有限公司 Spontaneous power supply circuit of isolated form
CN106530672A (en) * 2016-12-29 2017-03-22 四川创能海博科技有限公司 Electricity consumption information acquisition query system, acquisition method and query method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108492544A (en) * 2018-04-08 2018-09-04 安特仪表集团有限公司 High speed carrier communication device and system
CN109682042A (en) * 2018-12-27 2019-04-26 哈尔滨研拓科技发展有限公司 A kind of electrical cabinet air-conditioner controller with industrial bus
CN109682042B (en) * 2018-12-27 2020-08-07 哈尔滨研拓科技发展有限公司 Regulator cubicle air conditioner controller with industrial bus

Similar Documents

Publication Publication Date Title
CN104868731B (en) Two-way isolation DC DC converters
CN102840800B (en) electronic detonator encoder
CN109166298A (en) Electric energy meter of new generation based on the communication of magnetic coupling and single channel power supply export technique
CN104734516B (en) Switching power circuit and computer power supply
CN107424402A (en) The carrier module that can be communicated with external equipment
CN206389350U (en) A kind of light-coupled isolation communicating circuit
CN107834634A (en) A kind of charging current limiter circuit for energy-storage battery group management system and the energy-storage battery group management system comprising charging current limiter circuit
CN207354279U (en) Plastic optical fiber equipment
CN102331735A (en) PLC bus control circuit applied to digital home
CN105099559A (en) Intelligent optical network unit
CN209201075U (en) A kind of dual-channel transmission system of coaxial cable transmission telecommunications number and data-signal
CN105611982B (en) A kind of battery, communication terminal and communication system
CN208423909U (en) A kind of charger
CN207184162U (en) One kind is used for active power distribution network intelligent terminal battery isolation monitoring of structures
CN207282006U (en) Final stage device for low-voltage collecting meter reading system monitors system
CN213957869U (en) Internet gateway circuit
CN108880878A (en) NB-IOT network switching device
CN209250636U (en) Power supply ethernet network based on power line Ethernet merges adaptive device
CN206788242U (en) A kind of communicator in single-phase broadband power line carrier kilowatt meter reading-out system
CN207896971U (en) A kind of fiber optical transceiver of band distal end fault location function
CN207586291U (en) A kind of three-phase intelligent electric-energy meter and PLC module assembly system
CN201515367U (en) Power line chopping communication transceiver circuit
CN203659206U (en) Optical communication device
CN205864075U (en) A kind of active power distribution network intelligent terminal's accumulator isolation monitoring device
CN208707633U (en) A kind of high-speed communication circuit of meter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
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: 20171201