CN207704636U - A kind of micro- work(wireless communication devices of NB-IOT - Google Patents
A kind of micro- work(wireless communication devices of NB-IOT Download PDFInfo
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- CN207704636U CN207704636U CN201721689932.7U CN201721689932U CN207704636U CN 207704636 U CN207704636 U CN 207704636U CN 201721689932 U CN201721689932 U CN 201721689932U CN 207704636 U CN207704636 U CN 207704636U
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Abstract
The utility model is related to a kind of micro- work(wireless communication devices of NB IOT, for power information acquisition system, the technical issues of what is solved is existing NB IOT micro- work(wireless communication device poor compatibilities, it is connect with the electric energy meter in electricity consumption acquisition system by using by connector, the connector is matched with the network interface of the electric energy meter in existing electricity consumption acquisition system, the micro- work(wireless communication devices of NB IOT include MCU module, the upstream Interface module and downstream interface module being connect with MCU module, it further include the technical solution for the power module of the micro- work(wireless communication device power supplies of NB IOT, preferably resolve the problem, it can be used in the power information acquisition of intelligent electric meter.
Description
Technical field
The utility model is related to intelligent grid fields, and in particular to a kind of micro- work(wireless communication devices of NB-IOT.
Background technology
Present intelligent electric meter is according to configuration parameter, daily timing freezing data, then passes through its internal power carrier mould
Block periodically sends freezing data to concentrator, and the data of the ammeter are stored in local by concentrator, and timed task is waited for start
Or main website calling instruction is waited for, the preposition management of service communication that the freezing data of all ammeters under it is uploaded to main website side is single
Member.Main website would generally marshal data acquisition tasks, be then handed down to the preposition administrative unit of service communication, data issued by the unit
Transmit instructions to concentrator.Communication between the preposition administrative unit of business and concentrator is generally based on the real-time double of TCP connection
To communication mechanism.Although the preposition administrative unit of main website side business is usually reserved with UDP communication interfaces, concentrator is also usually reserved with
UDP communication interfaces, but currently in order to ensure the success rate of data acquisition, relied on come transmission data using Transmission Control Protocol
The retransmission mechanism of TCP ensures the reliability of data transmission procedure.
Concentrator maintains heartbeat link using short time timing heartbeat mechanism, and timing daily uploads the mechanism of data, right
The concentrator of failure is passed in timing, main website issues successively actively calls the acquisition tasks of data to the concentrator.Power information is adopted
When collecting system is disposed, tens to hundreds of intelligent electric meters are hung under a concentrator, under a preposition administrative unit of service communication
It hangs and tens of thousands of differs to hundreds of thousands concentrator.Under this architecture, the intelligent electric meter data that main website obtains can only be history
Data.The main website data warehouse of one power information acquisition system needs to accommodate the data of hundreds thousand of to millions of intelligent electric meters.
Although remaining with the direct acquisition instructions from main website to intelligent electric meter in whole system design, it is limited to power carrier
The communication mode of concurrent and transmission performance and the service communication preposition management and concentrator of module, is difficult to realize to each electricity
The real-time data acquisition of table.
The existing micro- work(wireless communication devices of NB-IOT are to redesign for power information acquisition system, Bu Nengyu
Intelligent electric meter before is compatible with, and the communication of concentrator and business main website cannot be substituted.The utility model applies NB-IOT
In power information extraction system, if carrying out the transformation of NB-IOT communication capacities to intelligent electric meter, realize straight from main website to ammeter
It adopts, whole system structure will be brought greater impact.
Utility model content
The technical issues of technical problem to be solved in the utility model is poor compatibility existing in the prior art.It provides
A kind of micro- work(wireless communication devices of new NB-IOT are used for power information acquisition system, the micro- work(wireless communication devices of the NB-IOT
Have the characteristics that good compatibility, there is low pressure information collection function, can realize detection of power loss.
In order to solve the above technical problems, the technical solution used is as follows：
A kind of micro- work(wireless communication devices of NB-IOT are used for power information acquisition system, the micro- work(channel radios of NB-IOT
T unit is connect by connector with the electric energy meter in electricity consumption acquisition system, in the connector and existing electricity consumption acquisition system
Electric energy meter network interface matching, the micro- work(wireless communication devices of NB-IOT include MCU module, are connect with MCU module
Upstream Interface module and downstream interface module further include the power module for the micro- work(wireless communication device power supplies of NB-IOT.
The operation principle of the utility model：The utility model is using apparent size and electric interfaces with carrier module complete one
Cause embedded NB-IOT communication modules, replace original carrier module, realize NB-IOT communication function will use connector with
Electric energy meter connection in electricity consumption acquisition system, the network interface of the connector and the electric energy meter in existing electricity consumption acquisition system
Matching, and MCU module is used, the upstream Interface module being connect with MCU module and downstream interface module are completed to using telecommunications in the past
It ceases the perfect of wireless carrier communication module in acquisition system to replace, realizes and business main website is changed by concentrator transfer acquisition information
Directly acquire electric energy meter information.
In said program, for optimization, further, the MCU module includes microcontroller, and what is connect with microcontroller guards the gate
Dog, clock circuit and debugging interface.
Further, the MCU module further include with microcontroller by the sequentially connected electrical level matching circuit of I/O port with fall
Power detection circuit, the power-fail detection circuit and is connected with external interface.
Further, the downstream interface module includes passing through the sequentially connected electrical level match of UART interface with MCU module
Unit, interface protection unit, TTL serial line interfaces and signal control interface.
Further, the upstream Interface module includes the wireless communication module being connect by UART interface with MCU module,
The SIM card interface being connect by interface protective circuit with wireless communication module, the antenna element being connect with wireless communication module.
Further, it is also associated between the wireless communication module and MCU module for characterizing wireless communication module work
Make the display unit of state.
Further, the power module includes being converted for the first power supply of MCU module and downstream interface module for power supply
The output voltage of unit, the first power conversion unit is DC3.3V and DC5V；Further include for upstream Interface module for power supply
The output voltage of two power conversion units, second source converting unit is DC3.8V.
Further, the power module further includes backup power supply, and the output voltage of backup power supply is DC3.8V.
Further, the power module further includes detection of power loss unit.
The beneficial effects of the utility model：
Effect one substitutes the micro- work(wireless communication devices of carrier wave NB-IOT of existing individual event carrier power meter, establish ammeter with
The preposition administrative unit of service communication of main website side is communicated, and concentrator is not needed, and the real-time for improving acquisition information improves；
Effect two realizes the low pressure information collection function based on honeycomb technology of Internet of things；
Effect three realizes detection of power loss function and power loss event reporting functions；
Effect four realizes acquisition, transmission and the access function of power information acquisition system business.
Description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1, the high-level schematic functional block diagram of the micro- work(wireless communication devices of NB-IOT in embodiment 1.
Fig. 2, the connection diagram of the micro- work(wireless communication devices of NB-IOT in embodiment 1.
Fig. 3, the light current interface of the micro- work(wireless communication devices of NB-IOT defines relation schematic diagram in embodiment 1.
Fig. 4, the forceful electric power interface of the micro- work(wireless communication devices of NB-IOT defines relation schematic diagram in embodiment 1.
Fig. 5, backup power supply connection diagram.
Fig. 6 carries out the connection diagram of detection of power loss using special module.
Fig. 7 carries out the connection diagram of detection of power loss using discrete component.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining that this practicality is new
Type is not used to limit the utility model.
Embodiment 1
The present embodiment provides a kind of micro- work(wireless communication devices of NB-IOT, are used for power information acquisition system, such as Fig. 1, institute
The micro- work(wireless communication devices of NB-IOT are stated to connect with the electric energy meter in electricity consumption acquisition system by connector, the connector with it is existing
The network interface of electric energy meter in some electricity consumption acquisition systems matches, and the micro- work(wireless communication devices of NB-IOT include MCU moulds
Block, the upstream Interface module and downstream interface module being connect with MCU module further include being used for the micro- work(wireless communication devices of NB-IOT
The power module of power supply.
Though module, there are many communication interface, for external interface form only there are two connector, one is RF connections, one
A is the connector docked with electric energy meter.RF connectors are realized using the special SMA connectors of RF；The connector docked with electric energy meter
It is the double contact pin realization of 2.54mm spacing, wherein including power interface, communication data interface and other functional interfaces.Module
Anti-mis-insertion design is used between electric energy meter.Module and electric energy meter connection error are avoided using the special structure design of module.
Using the design of existing hot-swapping controller chip and its control strategy, its main feature is that working as in circuit board into and out electrification
When bottom plate, a variety of protections can be provided for circuit board and bottom plate, include mistake/under-voltage protection of supply voltage, output voltage it is under-voltage
Protection and three-level current-limiting protection etc..Distributed power supply is used in multi-module embedded communication terminal, is to meet the other functions of system
In the case of performance, using Distributed Design, business is avoided excessively to concentrate.
Specifically, such as Fig. 2, the MCU module includes microcontroller, and microcontroller uses STM32F103CB, connect with microcontroller
House dog SP706, clock circuit and debugging interface, debugging interface uses SW interfaces.The micro- work(wireless communication devices of NB-IoT are embedding
Enter formula module and shares two groups of clocks, respectively MCU work clocks, SIM card work clock.The use of separate outer clock source is MCU
Work clock；The work clock of SIM card is directly provided by M6310 modules.The micro- embedded moulds of work(wireless communication device of NB-IoT
Block is designed with the reset of MCU outer watchdogs.The reset of MCU is realized by special watchdog chip.Modular power source be then by
Electric energy meter directly provides, and does corresponding DC-DC conversions on plate again.
Specifically, such as Fig. 2, the MCU module further includes passing through the sequentially connected electrical level matching circuit of I/O port with microcontroller
With power-fail detection circuit, the power-fail detection circuit and it is connected with external interface.
Power-fail detection circuit has 2 kinds of schemes, a kind of such as Fig. 6 to realize detection of power loss using special module.Another such as Fig. 7,
Power-fail detection circuit is built using discrete component.The micro- work(wireless communication devices of NB-IOT are provided by backup power supply after system power failure
Electric energy, backup power supply can ensure the micro- work(wireless communication devices of NB-IOT after a power failure can normal operation for a period of time.Two kinds
In the implementation of detection of power loss, scheme one use dedicated detection of power loss module, realized from principle it is fairly simple, but
Be the cost of special module costly；Scheme two using discrete component carry out detection of power loss, circuit is somewhat more complex, but from
This angle considers that scheme two is far superior to scheme one.
The power-fail detection circuit of discrete component is used in the present embodiment, can be ensured in terms of reliability.Such as Fig. 7, power down
Detection circuit includes connecting pin VCC1, first switch pipe Q1, second switch pipe Q2, third switching tube Q3 and signal output pin
COMP1；Further include rectification circuit and the second bleeder circuit, rectification circuit includes diode D3 and D4, and the second bleeder circuit includes
The first end of 3rd resistor R3 and the 4th resistance R4,3rd resistor R3 are the input terminal of the second bleeder circuit, 3rd resistor R3's
Second end connects the first end of the 4th resistance R4, and the first end of the second end ground connection of the 4th resistance R4, the 4th resistance R4 is second
The output end of bleeder circuit；Forceful electric power input interface connects the control of first switch pipe Q1 by rectification circuit and the second bleeder circuit
End；Wherein, the anode connection forceful electric power input port of rectification circuit, the cathode of rectification circuit connect the input terminal of the second bleeder circuit,
The control terminal of the output end connection first switch pipe Q1 of second bleeder circuit.Further include capacitance C1, capacitance C2, capacitance in circuit
C3, capacitance C4 constitute the circuits RC, and filtering interference signals respectively at corresponding resistor.
After system power failure, backup power supply is by being supplied to the micro- work(wireless communication devices of NB-IOT, system electricity after DC-DC voltage stabilizings
The micro- work(wireless communication device work of NB-IOT is not interfered with after the power down of source, only consuming the module that is in backup power supply can just stop
Work.
Such as Fig. 3, the light current interface of the micro- work(wireless communication devices of NB-IOT defines relation schematic diagram in embodiment 1.Fig. 4, it is real
The forceful electric power interface for applying the micro- work(wireless communication devices of NB-IOT in example 1 defines relation schematic diagram.Wherein, VCC 12V are defeated as power supply
Enter, the micro- work(wireless communication device power inputs of NB-IOT, 12V+1V.RXD is module serial ports output signal (5V/TTL)；/ SET is
Module setting is enabled；When low level, the micro- work(wireless communication devices of NB-IOT can be set.Open-drain mode, normality are high-impedance state；
TXD is module serial ports input signal (5V/TTL)；/ RST is to reset output, and low level is effective, and open-drain mode, normality is high resistant
State, can be used for resetting the micro- work(wireless communication devices of NB-IOT, and reset signal pulsewidth is not less than 0.2S；STA is address when receiving
02s high-impedance states are exported with correct module；Communication module transmission process exports high-impedance state, and CPU judges to forbid when communication is sent in table
Operational relay.It is required that the micro- work(wireless communication device outputs of NB-IOT are open-drain mode, normality is low level.The micro- work(of NB-IOT without
Line communication device low level current driving capability is not less than 2mA；I exports electric energy meter state-event EVENTOUT, open-drain mode,
Normality is low level.When there is the generation of active reporting event, high-impedance state, requesting query active reporting status word are exported；It has inquired
Finish output low level.N is zero curve；NC is hanging, ensures the safe insulation between zero curve, firewire；L is firewire.
Specifically, such as Fig. 2, the downstream interface module includes passing through the sequentially connected level of UART interface with MCU module
Matching unit, interface protection unit, TTL serial line interfaces and signal control interface.
Specifically, such as Fig. 2, the upstream Interface module includes the wireless telecommunications being connect by UART interface with MCU module
Module, using M5310, the SIM card interface being connect by interface protective circuit with wireless communication module connects with wireless communication module
The interface of the antenna element connect, antenna element uses SMA interfaces.
Specifically, it such as Fig. 2, is also associated between the wireless communication module and MCU module for characterizing wireless telecommunications mould
The indicator light of block working condition.Module key signal and power unit are designed with test point；The micro- work(wireless communications of NB-IOT
Device itself is designed with status indicator lamp, can determine whether module status according to LED status.
Specifically, such as Fig. 2, the power module includes the first power supply for MCU module and downstream interface module for power supply
The output voltage of converting unit, the first power conversion unit is DC3.3V and DC5V, using TLV1117-33；Further include being used for
The output voltage of the second source converting unit of line interface module for power supply, second source converting unit is DC3.8V, is used
MIC29302。
Specifically, such as Fig. 5, power module further includes backup power supply, and the output voltage of backup power supply is DC3.8V.Standby electricity
Source using super capacitor be used as collection of energy and memory device, by charging circuit progress super capacitor charging, discharge circuit into
Row standby is discharged, storage capacitor amount calculation formula：
C in formulaSUPFor the capacity of super capacitor, VSUP_MAXFor super capacitor rated voltage, VSUP+MINElectric discharge boost chip
Minimum starts voltage, η electric discharge boost chip efficiency, T discharge times, using the TPS61030 of TI as super in this implementation
The electric discharge boost chip of capacitance.
Although the illustrative specific implementation mode of the utility model is described above, in order to the art
Technical staff is it will be appreciated that the utility model, but the utility model is not limited only to the range of specific implementation mode, to this technology
For the those of ordinary skill in field, as long as long as the utility model that various change is limited and determined in the attached claims
In spirit and scope, all are created using the utility model of the utility model design in the row of protection.
Claims (9)
1. a kind of micro- work(wireless communication devices of NB-IOT are used for power information acquisition system, it is characterised in that：The NB-IOT is micro-
Work(wireless communication device is connect by connector with the electric energy meter in electricity consumption acquisition system, the connector and electricity consumption acquisition system
In electric energy meter network interface matching；
The micro- work(wireless communication devices of NB-IOT include MCU module, and the upstream Interface module and downlink being connect with MCU module connect
Mouth mold block further includes the power module for the micro- work(wireless communication device power supplies of NB-IOT.
2. the micro- work(wireless communication devices of NB-IOT according to claim 1, are used for power information acquisition system, feature exists
In：The MCU module includes microcontroller, the house dog being connect with microcontroller, clock circuit and debugging interface.
3. the micro- work(wireless communication devices of NB-IOT according to claim 2, are used for power information acquisition system, feature exists
In：The MCU module further includes with microcontroller by the sequentially connected electrical level matching circuit of I/O port and power-fail detection circuit, described
Power-fail detection circuit and it is connected with external interface.
4. the micro- work(wireless communication devices of NB-IOT according to claim 1, are used for power information acquisition system, feature exists
In：The downstream interface module includes passing through the sequentially connected electrical level match unit of UART interface, interface protection list with MCU module
Member, TTL serial line interfaces and signal control interface.
5. the micro- work(wireless communication devices of NB-IOT according to claim 1, are used for power information acquisition system, feature exists
In：The upstream Interface module includes the wireless communication module being connect by UART interface with MCU module, with wireless communication module
The SIM card interface connected by interface protective circuit, and the antenna element that is connect with wireless communication module.
6. the micro- work(wireless communication devices of NB-IOT according to claim 5, are used for power information acquisition system, feature exists
In：The display list for characterizing wireless communication module working condition is also associated between the wireless communication module and MCU module
Member.
7. according to any micro- work(wireless communication devices of NB-IOT of claim 1-6, it is used for power information acquisition system,
It is characterized in that：The power module includes the first power conversion unit for MCU module and downstream interface module for power supply；Power supply
Module further includes the second source converting unit for upstream Interface module for power supply.
8. the micro- work(wireless communication devices of NB-IOT according to claim 7, are used for power information acquisition system, feature exists
In：The power module further includes backup power supply, and the output of back power supply and the first power conversion unit and second source conversion are single
The output of member is consistent.
9. the micro- work(wireless communication devices of NB-IOT according to claim 7, are used for power information acquisition system, feature exists
In：The power module further includes detection of power loss unit, and the detection of power loss unit is connect with MCU module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721689932.7U CN207704636U (en) | 2017-12-07 | 2017-12-07 | A kind of micro- work(wireless communication devices of NB-IOT |
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| CN201721689932.7U CN207704636U (en) | 2017-12-07 | 2017-12-07 | A kind of micro- work(wireless communication devices of NB-IOT |
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| CN207704636U true CN207704636U (en) | 2018-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818675A (en) * | 2017-12-07 | 2018-03-20 | 国网重庆市电力公司客户服务中心 | Power information acquisition system and the micro- work(radio communication devices of NB IOT |
-
2017
- 2017-12-07 CN CN201721689932.7U patent/CN207704636U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818675A (en) * | 2017-12-07 | 2018-03-20 | 国网重庆市电力公司客户服务中心 | Power information acquisition system and the micro- work(radio communication devices of NB IOT |
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