CN204270488U - A kind of plug and play type electric energy meter 3G communication module - Google Patents
A kind of plug and play type electric energy meter 3G communication module Download PDFInfo
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- CN204270488U CN204270488U CN201420803902.4U CN201420803902U CN204270488U CN 204270488 U CN204270488 U CN 204270488U CN 201420803902 U CN201420803902 U CN 201420803902U CN 204270488 U CN204270488 U CN 204270488U
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Abstract
The utility model is applicable to electric energy meter technical field, provide a kind of plug and play type electric energy meter 3G communication module, comprising: light current interface, control circuit, storage unit, level shifting circuit, 3G communication unit, SIM card circuit and DC-DC switching power circuit; The described light current interface of described 3G communication module is connected with the communication interface of electric energy meter; Described DC-DC switching power circuit provides power supply for described 3G communication module; Described control circuit, level shifting circuit, 3G communication unit are connected successively with SIM card circuit, and described control circuit also connects storage unit.The connection carrier module utilizing carrier electric energy meter itself to exist or the communication interface of micro power radio module, 3G communication module is communicated with electric energy meter by this communication interface, the 3G communication that electric energy meter inner structure or program just can realize electric energy meter need not be revised, plug and play, relative new production 3G ammeter, reduce cost, decrease the wasting of resources.
Description
Technical field
The utility model belongs to electric energy meter technical field, particularly relates to a kind of plug and play type electric energy meter 3G communication module.
Background technology
Along with the development of science and technology, the meter reading method of electric energy meter has completed by the transformation of on-the-spot manual metering mode to remote automatic meter reading mode.Now conventional remote meter reading mode mainly contains RS485 bus mode, low voltage power line carrier mode, and the GPRS radio meter register mode etc. of rising recently, and several communication modes all cuts both ways.
The 3G communication technology to provide data service at a high speed, along with transmission capacity is large, the popularization of real-time 3G network, how 3G interface is incorporated one of requirement becoming Design of intelligent electric power meter in intelligent electric meter, the intelligent electric meter that current use 3G communicates is all a kind of electric energy meters of design separately, application for a patent for invention (the application number: 201310342053.7 that name is called " a kind of intelligent electric meter based on WIFI and 3G network ", Shen Qing Publication day: on Dec 4th, 2013), and name is called the utility application (application number: 201220556638.X of " 3G ammeter ", authorized announcement date: on April 17th, 2013), all disclose a kind of electric energy meter using 3G to communicate, all that existing ammeter inside is improved, increase and be connected with the microcontroller of ammeter inside " 3G wireless network communication system (7) " or " 3G interface module " that communicate, therefore not that the ammeter of 3G communication needs to carry out transformation and could realize 3G communication.
Utility model content
The object of the utility model embodiment is to provide a kind of plug and play type electric energy meter 3G communication module, is not that the ammeter that 3G communicates needs to carry out transforming the problem that could realize 3G communication to solve prior art.
The utility model embodiment realizes like this, a kind of plug and play type electric energy meter 3G communication module, described 3G communication module comprises: light current interface, control circuit, storage unit, level shifting circuit, 3G communication unit, SIM card circuit and DC-DC switching power circuit;
The described light current interface of described 3G communication module is connected with the communication interface of electric energy meter;
Described DC-DC switching power circuit provides power supply for described 3G communication module;
Described control circuit, level shifting circuit, 3G communication unit are connected successively with SIM card circuit, and described control circuit also connects storage unit.
In first preferred embodiment of a kind of plug and play type electric energy meter 3G communication module that the utility model provides: connect in the described level shifting circuit of described control circuit and described 3G communication unit:
Level shifting circuit between the reception FPDP of described control circuit and the transmission FPDP of described 3G communication unit comprises NPN type triode BG3, resistance R13 and resistance R14; Described triode BG3 base stage connects 2.85V voltage by described resistance R14, and collector connects the reception FPDP of described control circuit, and emitter connects the transmission FPDP of described 3G communication unit; Described resistance R13 one end connects 4V voltage, and the other end connects the collector of described triode BG3;
Level shifting circuit between the transmission FPDP of described control circuit and the reception FPDP of described 3G communication unit comprises diode D1, resistance R15 and resistance R16; Described diode D1 positive pole is connected with the reception FPDP of described 3G communication unit, the transmission FPDP of negative pole and described control circuit; Described resistance R15 one end connects the reception FPDP of described 3G communication unit, and the other end connects 2.85V voltage; Described resistance R16 one end connects the transmission FPDP of described control circuit, and the other end connects 4V voltage.
In second preferred embodiment of a kind of plug and play type electric energy meter 3G communication module that the utility model provides: described 3G communication module also comprises indicator light circuit and SIM card anti-static protection circuit.
The beneficial effect of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides comprises:
1, a kind of plug and play type electric energy meter 3G communication module of providing of the utility model, the connection carrier module utilizing carrier electric energy meter itself to exist or the communication interface of micro power radio module, 3G communication module is communicated with electric energy meter by this communication interface, the 3G communication that electric energy meter inner structure or program just can realize electric energy meter need not be revised, plug and play, relative new production 3G ammeter, reduces cost, decreases the wasting of resources.
2, comprise indicator light circuit and SIM card anti-static protection circuit, indicator light circuit is used for the duty to current 3G communication module; SIM card anti-static protection circuit in hot plug or when normally working, from extraneous static interference, ensures the correctness read and write data and the integrality of SIM card for the protection of SIM card.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the communication light current interface pin schematic diagram of carrier electric energy meter;
Fig. 2 is the structural representation of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides;
Fig. 3 is the structural representation of the light current interface circuit of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides;
Fig. 4 is the structural representation of the DC-DC switching power circuit of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides;
Fig. 5 is the structural representation of the level shifting circuit of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides;
Fig. 6 is the structural representation that the 3G communication unit of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides is connected with SIM card interface;
Fig. 7 is the structural representation of the indicator light circuit of a kind of plug and play type electric energy meter 3G communication module that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In order to technical scheme described in the utility model is described, be described below by specific embodiment.
Carrier electric energy meter itself is provided with the communication interface connecting carrier module or micro power radio module, and realize the communication of ammeter, be illustrated in figure 1 the communication light current interface pin schematic diagram of carrier electric energy meter, each pin definitions is:
1 pin and 2 pin VCC are communication module analog power, are provided by electric energy meter;
3 pin and 4 pin VSS are communicatedly;
5 pin RXD are that communication module sends signal pins to electric energy meter;
7 pin/SET is module installation enable pin;
8 pin TXD are electric energy meter signal of communication output pin;
9 pin/RST is reset output pin;
10 pin STA are module communication status pin;
11 pin EVENOUT are electric energy meter state-event output pin;
6 pin and 12 pin are that module reserves pin.
A kind of plug and play type electric energy meter 3G communication module that the utility model provides, be illustrated in figure 2 the structural representation that the utility model provides a kind of plug and play type electric energy meter 3G communication module, as shown in Figure 2, this 3G communication module comprises light current interface, control circuit, storage unit, level shifting circuit, 3G communication unit, SIM card circuit and DC-DC switching power circuit, 3G communication module utilizes light current interface to be connected with the communication interface of electric energy meter, realize the plug and play of 3G module, DC-DC switching power circuit provides power supply for 3G communication module, control circuit, level shifting circuit, 3G communication unit is connected successively with SIM card circuit, control circuit also connects storage unit.
Be respectively the structural representation of the light current interface of the plug and play type electric energy meter 3G communication module that the utility model provides, DC-DC switching power circuit and level shifting circuit as in Figure 3-5, the structural representation that the 3G communication unit being respectively the plug and play type electric energy meter 3G communication module that the utility model provides as shown in Figure 6 is connected with outside.
3G communication unit comprises conventional 3G chip and peripheral circuit, from Fig. 5 and Fig. 6, in the level shifting circuit of connection control circuit and 3G communication unit:
Level shifting circuit between the reception FPDP of control circuit and the transmission FPDP of 3G communication unit comprises NPN type triode BG3, resistance R13 and resistance R14; Triode BG3 base stage connects 2.85V voltage by resistance R14, the reception FPDP of collector connection control circuit, and emitter connects the transmission FPDP of 3G communication unit; Resistance R13 one end connects 4V voltage, the collector of other end connecting triode BG3.
Level shifting circuit between the transmission FPDP of control circuit and the reception FPDP of 3G communication unit comprises diode D1, resistance R15 and resistance R16; Diode D1 positive pole is connected with the reception FPDP of 3G communication unit; The transmission FPDP of negative pole and control circuit; Resistance R15 one end connects the reception FPDP of 3G communication unit, and the other end connects 2.85V voltage; The transmission FPDP of resistance R16 one end connection control circuit, the other end connects 4V voltage.
Further, a kind of plug and play type electric energy meter 3G communication module that the utility model provides also comprises indicator light circuit and SIM card anti-static protection circuit, and indicator light circuit is used for the duty to current 3G communication module; SIM card anti-static protection circuit in hot plug or when normally working, from extraneous static interference, ensures the correctness read and write data and the integrality of SIM card for the protection of SIM card.Be illustrated in figure 7 the structural representation of the indicator light circuit in a kind of plug and play type electric energy meter 3G communication module that the utility model provides.
In concrete operations, the ground connection contact pin of module and ammeter connecting contact pin suitably need be added and be about 0.5mm, module tenaculum electric heating is plugged, solve the problem that warm swap module or electric energy meter damage.
A kind of plug and play type electric energy meter 3G communication module that the utility model provides, the connection carrier module utilizing carrier electric energy meter itself to exist or the communication interface of micro power radio module, 3G communication module is communicated with electric energy meter by this communication interface, the 3G communication that electric energy meter inner structure or program just can realize electric energy meter need not be revised, plug and play, relative new production 3G ammeter, reduces cost, decreases the wasting of resources.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. a plug and play type electric energy meter 3G communication module, is characterized in that, described 3G communication module comprises: light current interface, control circuit, storage unit, level shifting circuit, 3G communication unit, SIM card circuit and DC-DC switching power circuit;
The described light current interface of described 3G communication module is connected with the communication interface of electric energy meter;
Described DC-DC switching power circuit provides power supply for described 3G communication module;
Described control circuit, level shifting circuit, 3G communication unit are connected successively with SIM card circuit, and described control circuit also connects storage unit.
2. 3G communication module as claimed in claim 1, is characterized in that, connect in the described level shifting circuit of described control circuit and described 3G communication unit:
Level shifting circuit between the reception FPDP of described control circuit and the transmission FPDP of described 3G communication unit comprises NPN type triode BG3, resistance R13 and resistance R14; Described triode BG3 base stage connects 2.85V voltage by described resistance R14, and collector connects the reception FPDP of described control circuit, and emitter connects the transmission FPDP of described 3G communication unit; Described resistance R13 one end connects 4V voltage, and the other end connects the collector of described triode BG3;
Level shifting circuit between the transmission FPDP of described control circuit and the reception FPDP of described 3G communication unit comprises diode D1, resistance R15 and resistance R16; Described diode D1 positive pole is connected with the reception FPDP of described 3G communication unit, the transmission FPDP of negative pole and described control circuit; Described resistance R15 one end connects the reception FPDP of described 3G communication unit, and the other end connects 2.85V voltage; Described resistance R16 one end connects the transmission FPDP of described control circuit, and the other end connects 4V voltage.
3. 3G communication module as claimed in claim 1, it is characterized in that, described 3G communication module also comprises indicator light circuit and SIM card anti-static protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803902.4U CN204270488U (en) | 2014-12-17 | 2014-12-17 | A kind of plug and play type electric energy meter 3G communication module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803902.4U CN204270488U (en) | 2014-12-17 | 2014-12-17 | A kind of plug and play type electric energy meter 3G communication module |
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| CN204270488U true CN204270488U (en) | 2015-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118258A (en) * | 2015-08-14 | 2015-12-02 | 武汉盛帆电子股份有限公司 | Intelligent bimodule communication electricity meter and centralized meter reading and networking method |
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2014
- 2014-12-17 CN CN201420803902.4U patent/CN204270488U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118258A (en) * | 2015-08-14 | 2015-12-02 | 武汉盛帆电子股份有限公司 | Intelligent bimodule communication electricity meter and centralized meter reading and networking method |
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