CN202916912U - Smart card isolation type electric energy meter - Google Patents
Smart card isolation type electric energy meter Download PDFInfo
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- CN202916912U CN202916912U CN 201220557372 CN201220557372U CN202916912U CN 202916912 U CN202916912 U CN 202916912U CN 201220557372 CN201220557372 CN 201220557372 CN 201220557372 U CN201220557372 U CN 201220557372U CN 202916912 U CN202916912 U CN 202916912U
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Abstract
The utility model discloses a smart card isolation type electric energy meter. A smart card port is separated in a photoelectric mode. An output of an active oscillator or an oscillator composed of positive crystal and a gate circuit provides clock signals to a smart card. An isolating circuit and an oscillating circuit are made into a single circuit module. The smart card port and a microprocessor port are output, and electric isolation of the smart card and a microprocessor is achieved.
Description
Technical field
The utility model relates to the electric system Electric Measurement Technology, more particular words it, the utility model relates to a kind of intelligent electric energy meter with electric isolation type contact intelligent card module for reading and writing.
Background technology
Along with the construction of China's extensive city net and deepening continuously of improvement project, on the critical facility electrical measuring device in the electrical network, the status in the urban distribution network with certain load density is more and more important.Continuing to bring out of skyscraper and large public building more and more tends to reach perfection with complicated city function, the electric system user has higher requirement to reliability and the dirigibility of electric energy meter, and the performance that therefore improves intelligent electric energy meter has very important effect.
Development along with Electric Measurement Technology, present intelligent electric meter generally has data computing and communication function, for some network KWH meter, wherein be provided with the plug-in card part, to realize the procotol transfer function, and for other power consumer forward purchasing electric systems, carry out taking over and managing of the electricity charge with card insert type equipment.Do not carry out effective electrical isolation between current smart card part and the single-chip microcomputer of electric energy meter or the similar processing module, have following defective:
1, need to be at the indoor design three-way power with the electric energy meter of RS485 communication interface and contact type intelligent card interface, cost is high;
2, because the bayonet socket contact can touch by bayonet socket, and microcontroller and bayonet socket be without electrical isolation, when the static of the high voltage macro-energy that requires of being above standard causes bayonet socket to lose efficacy, there is the risk of electric energy meter metering inefficacy;
3, owing to need between indoor design three-way power and three-way power, need electrical isolation with the electric energy meter of RS485 communication interface and contact type intelligent card interface, the electric energy meter design difficulty of inner limited space is increased greatly.
The utility model content
The purpose of this utility model is by adopting photovoltaic isolated intelligent card interface, adopt active oscillator or be output as smart card by the oscillator that consists of without source crystal and gate circuit clock signal is provided, buffer circuit and oscillatory circuit are made independent circuit module, output intelligent card interface and Microprocessor Interface realize the electrical isolation between smart card and the microcontroller.
In order to solve the problems of the technologies described above, design proposal of the present utility model: the isolated electric energy meter of a kind of smart card, it comprises microprocessor, smart card module for reading and writing and power module, further comprise buffer circuit and oscillatory circuit, wherein said power module is connected to respectively microprocessor, smart card module for reading and writing, buffer circuit and oscillatory circuit and operating voltage is provided for it, described buffer circuit is connected between microprocessor and the smart card module for reading and writing, and described oscillatory circuit is connected to the smart card module for reading and writing.
Further, in preferred embodiment of the present utility model, described microprocessor is to connect respectively power module and buffer circuit by its MPU (MICROPROCESSOR UNIT) interface; Described smart card module for reading and writing is to connect respectively power module, buffer circuit and oscillatory circuit by its contact type intelligent card interface.
Further, in preferred embodiment of the present utility model, described contact type intelligent card interface is the photo-electric isolating interface.
Further, in preferred embodiment of the present utility model, described oscillatory circuit is for active oscillator or by without the integrated crystal formula oscillator of source crystal and gate circuit and for described smart card module for reading and writing provides clock signal, and it and described buffer circuit are co-located on the circuit board with described microprocessor, smart card module for reading and writing and power module split.
Further, in preferred embodiment of the present utility model, power module is the power circuit access electric network power line of mutually isolating by two-way.
The utility model has following beneficial effect owing to having adopted technique scheme:
1, band RS485 communication electric energy meter three-way power can change to the two-way power supply, has simplified Power Management Design;
When 2, simplifying the design of electric energy meter smart card read-write interface, the static of the high voltage macro-energy that requires being above standard is so that during the bayonet socket disabler, on the normal metering of electric energy meter without affecting;
3, simplified the design of electric energy meter.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the structure principle chart of the utility model preferred embodiment.
Embodiment
As shown in Figure 1, the preferred embodiment of the isolated electric energy meter of the utility model smart card comprises microprocessor 1, smart card module for reading and writing 2 and power module 3, further comprise buffer circuit 4 and oscillatory circuit 5, wherein said power module 3 is connected to respectively microprocessor 1, smart card module for reading and writing 2, buffer circuit 4 and oscillatory circuit 5 and operating voltage is provided for it, described buffer circuit 4 is connected between microprocessor 1 and the smart card module for reading and writing 2, and described oscillatory circuit 5 is connected to smart card module for reading and writing 2.
Further, in preferred embodiment of the present utility model, described microprocessor 1 is to connect respectively power module 3 and buffer circuit 4 by its MPU (MICROPROCESSOR UNIT) interface 11; Described smart card module for reading and writing 2 is to connect respectively power module 3, buffer circuit 4 and oscillatory circuit 5 by its contact type intelligent card interface 21.
Further, in preferred embodiment of the present utility model, described contact type intelligent card interface 21 is the photo-electric isolating interface.
Further, in preferred embodiment of the present utility model, described oscillatory circuit 5 is for active oscillator or by without the integrated crystal formula oscillator of source crystal and gate circuit and for described smart card module for reading and writing 2 provides clock signal, and it and described buffer circuit 4 are co-located on the circuit board with described microprocessor 1, smart card module for reading and writing 2 and power module 3 splits.
Preferred implementation of the present utility model is detailed description only, is not to be restriction to technology category of the present utility model.
Claims (5)
1. isolated electric energy meter of smart card, it comprises microprocessor (1), smart card module for reading and writing (2) and power module (3), it is characterized in that: further comprise buffer circuit (4) and oscillatory circuit (5), wherein said power module (3) is connected to respectively microprocessor (1), smart card module for reading and writing (2), buffer circuit (4) and oscillatory circuit (5) also provide operating voltage for it, described buffer circuit (4) is connected between microprocessor (1) and the smart card module for reading and writing (2), and described oscillatory circuit (5) is connected to smart card module for reading and writing (2).
2. the isolated electric energy meter of smart card as claimed in claim 1, it is characterized in that: described microprocessor (1) is to connect respectively power module (3) and buffer circuit (4) by its MPU (MICROPROCESSOR UNIT) interface (11); Described smart card module for reading and writing (2) is to connect respectively power module (3), buffer circuit (4) and oscillatory circuit (5) by its contact type intelligent card interface (21).
3. the isolated electric energy meter of smart card as claimed in claim 2, it is characterized in that: described contact type intelligent card interface (21) is the photo-electric isolating interface.
4. the isolated electric energy meter of smart card as claimed in claim 1, it is characterized in that: described oscillatory circuit (5) is for active oscillator or by without the integrated crystal formula oscillator of source crystal and gate circuit and provide clock signal for described smart card module for reading and writing (2), and it and described buffer circuit (4) are co-located on the circuit board with described microprocessor (1), smart card module for reading and writing (2) and power module (3) split.
5. the isolated electric energy meter of smart card as claimed in claim 1 is characterized in that: described power module (3) is the power circuit access electric network power line that adopts two-way mutually to isolate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557372 CN202916912U (en) | 2012-10-26 | 2012-10-26 | Smart card isolation type electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557372 CN202916912U (en) | 2012-10-26 | 2012-10-26 | Smart card isolation type electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916912U true CN202916912U (en) | 2013-05-01 |
Family
ID=48165202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220557372 Expired - Fee Related CN202916912U (en) | 2012-10-26 | 2012-10-26 | Smart card isolation type electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202916912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
-
2012
- 2012-10-26 CN CN 201220557372 patent/CN202916912U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20131026 |