CN201859962U - Photoelectricity isolation IC card seat - Google Patents
Photoelectricity isolation IC card seat Download PDFInfo
- Publication number
- CN201859962U CN201859962U CN 201020568642 CN201020568642U CN201859962U CN 201859962 U CN201859962 U CN 201859962U CN 201020568642 CN201020568642 CN 201020568642 CN 201020568642 U CN201020568642 U CN 201020568642U CN 201859962 U CN201859962 U CN 201859962U
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- power supply
- card deck
- isolated
- card
- over
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Abstract
The utility model discloses a photoelectricity isolation IC card seat which comprises an isolation power supply, a signal transmission unit, a clock unit, an overvoltage and overcurrent protection circuit and an IC card seat interface, wherein the isolation power supply, the signal transmission unit and the clock unit are controlled by a host system; the isolation power supply, the signal transmission unit and the clock unit transmit a data signal to the overvoltage and overcurrent protection circuit, the output of which is directly connected with the IC card seat interface that is connected with an IC card. The photoelectricity isolation IC card seat has the advantages that the structure is simple, antistatic, overcurrent and overvoltage capabilities are stronger, anti-attack capability of the whole system is improved, and the safety and reliability are good.
Description
Technical field
The utility model relates to a kind of photoelectricity and isolates the IC-card deck, belongs to prepayment meter control field.
Background technology
Widely used IC-card seat on prepayment meter at present, it is a kind of interface of standard, in the deck of this standard, the pin of IC-card directly contacts with the electrode of deck, and the electrode of deck directly links to each other by the control chip of internal wiring with prepayment meter inside.In actual use, owing to various reasons, the IC-card seat can be subjected to various attack, as static, high voltage, big electric current etc., because the internal control chip of prepayment meter directly links to each other with deck, therefore, these attacks can be directly delivered to the control chip of electric energy meter, cause the damage of prepayment meter control chip, the control section of whole prepayment meter was lost efficacy, thereby reach uncontrolled and purpose illegal electricity consumption.
In order to improve the anti-attack ability of IC-card seat, as Chinese patent 00252812.6 " closed IC-card and deck switch ", Chinese patent 98208165.0 " can prevent " and Chinese patent 98120004.4 " capable of preventing system from being attacked IC-card deck " etc. multiple solution has been proposed from the interface arrangement of IC-card deck attacking system, but these solutions resolution system problem of being attacked fundamentally.
Therefore, need provide a kind of new technical scheme to solve above-mentioned technical problem.
The utility model content
The purpose of this utility model provides a kind of simple in structure, and fail safe is good, and the photoelectricity that anti-attack ability is strong is isolated the IC-card deck.
The technical solution adopted in the utility model is:
A kind of photoelectricity is isolated the IC-card deck; it comprises insulating power supply, signal transmission unit, clock unit, over-voltage over-current protection circuit and IC-card deck interface; described insulating power supply, signal transmission unit and clock unit are controlled by host computer system; described insulating power supply, signal transmission unit and clock unit communicated data signal are given over-voltage over-current protection circuit; the output of described over-voltage over-current protection circuit directly is connected with IC-card deck interface, and described IC-card deck interface is connected with IC-card.
Described insulating power supply by the independent winding of mutually isolating on two independently-powered transformers, the same transformer, have a kind of power supply in the DC-DC module of electrical isolation.
Described insulating power supply comprises the insulating power supply output control circuit.
Described signal transmission unit is optocoupler and corresponding signal control circuit.
Described clock unit is produced by independent oscillating circuit or is transferred to the IC-card deck by the host computer system generation and by optocoupler.
Described over-voltage over-current protection circuit is made up of diode and thermistor.
Described diode is voltage stabilizing didoe or TVS pipe.
The beneficial effects of the utility model are: simple in structure, have stronger antistatic, overcurrent, overvoltage ability, and improve the anti-attack ability of machine system, the good and good reliability of fail safe.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a system architecture diagram of the present utility model.
Fig. 2 is that insulating power supply of the present utility model is for adopting the circuit of two independently-powered transformer-supplied.
Fig. 3 is that insulating power supply of the present utility model is for adopting the circuit of the independent winding power supply of isolating mutually on the same transformer.
Fig. 4 has the circuit of the DC-DC module for power supply of electrical isolation for employing for insulating power supply of the present utility model.
Fig. 5 is circuit theory diagrams of the present utility model.
Wherein: 1, host computer system, 2, insulating power supply, 3, signal transmission unit, 4, clock unit, 5, over-voltage over-current protection circuit, 6, IC-card deck interface, 7, IC-card, 8, the insulating power supply output control circuit.
Embodiment
As shown in Figure 1; a kind of photoelectricity of the present utility model is isolated the IC-card deck; it comprises insulating power supply 2, signal transmission unit 3, clock unit 4, over-voltage over-current protection circuit 5 and IC-card deck interface 6; insulating power supply 2, signal transmission unit 3 and clock unit 4 are by host computer system 1 control; insulating power supply 2, signal transmission unit 3 and clock unit 4 communicated data signals are given over-voltage over-current protection circuit 5; the output of over-voltage over-current protection circuit 5 directly is connected with IC-card deck interface 6, and IC-card deck interface 6 is connected with IC-card 7.
Fig. 2 adopts independently-powered transformer-supplied, adopts two independently transformer 1 and transformer 2 power supplies between host computer system and the IC-card deck system.
Fig. 3 is the independent winding power supply of isolating mutually on the same transformer.
Fig. 4 is the DC-DC module for power supply with electrical isolation, and the input power supply of DC-DC module is provided by host computer system.
As shown in Figure 5, insulating power supply 2 comprises insulating power supply output control circuit 8, insulating power supply output control circuit 8 comprises resistance R 7, resistance R 8, optocoupler OP1 and triode Q1, optocoupler OP1 output collector terminal is connected with resistance R 8 one ends with resistance R 7, optocoupler OP1 exports grounded emitter, resistance R 8 other ends are connected with triode Q1 base stage, and triode Q1 emitter is connected with resistance R 7 other ends.
Over-voltage over-current protection circuit 5 is managed by voltage stabilizing didoe D1-D5 or TVS and thermistor R1-R6 forms, and over-voltage over-current protection circuit 5 outputs directly are connected with IC-card deck interface 6.
The utility model is simple in structure, anti-attack ability is strong, fail safe and reliability height.
Claims (7)
1. a photoelectricity is isolated the IC-card deck; it is characterized in that: it comprises insulating power supply, signal transmission unit, clock unit, over-voltage over-current protection circuit and IC-card deck interface; described insulating power supply, signal transmission unit and clock unit are controlled by host computer system; described insulating power supply, signal transmission unit and clock unit communicated data signal are given over-voltage over-current protection circuit; the output of described over-voltage over-current protection circuit directly is connected with IC-card deck interface, and described IC-card deck interface is connected with IC-card.
2. a kind of photoelectricity according to claim 1 is isolated the IC-card deck, it is characterized in that: described insulating power supply by the independent winding of isolating mutually on two independently-powered transformers, the same transformer, have a kind of power supply in the DC-DC module of electrical isolation.
3. a kind of photoelectricity according to claim 1 is isolated the IC-card deck, and it is characterized in that: described insulating power supply comprises the insulating power supply output control circuit.
4. a kind of photoelectricity according to claim 1 is isolated the IC-card deck, it is characterized in that: described signal transmission unit is optocoupler and corresponding signal control circuit.
5. a kind of photoelectricity according to claim 1 is isolated the IC-card deck, it is characterized in that: described clock unit is produced by independent oscillating circuit or is transferred to the IC-card deck by the host computer system generation and by optocoupler.
6. a kind of photoelectricity according to claim 1 is isolated the IC-card deck, and it is characterized in that: described over-voltage over-current protection circuit is made up of diode and thermistor.
7. a kind of photoelectricity according to claim 6 is isolated the IC-card deck, it is characterized in that: described diode is voltage stabilizing didoe or TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020568642 CN201859962U (en) | 2010-10-20 | 2010-10-20 | Photoelectricity isolation IC card seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020568642 CN201859962U (en) | 2010-10-20 | 2010-10-20 | Photoelectricity isolation IC card seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859962U true CN201859962U (en) | 2011-06-08 |
Family
ID=44105762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020568642 Expired - Lifetime CN201859962U (en) | 2010-10-20 | 2010-10-20 | Photoelectricity isolation IC card seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201859962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407679A (en) * | 2014-11-29 | 2015-03-11 | 成都中远信电子科技有限公司 | Connection circuit for card holder of e-card system and computer |
-
2010
- 2010-10-20 CN CN 201020568642 patent/CN201859962U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407679A (en) * | 2014-11-29 | 2015-03-11 | 成都中远信电子科技有限公司 | Connection circuit for card holder of e-card system and computer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 226200 Jiangsu city of Nantong province Qidong Economic Development Zone No. 666 Lin Yang Lu Patentee after: JIANGSU LINYANG ENERGY CO., LTD. Address before: Qidong City, Jiangsu province 226200 Nantong City Economic Development Zone No. 666 Lin Yang Lu Patentee before: Jiangsu Linyang Electronics Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |
|
| CX01 | Expiry of patent term |