CN204129763U - The anti-theft device of non-contact IC card - Google Patents
The anti-theft device of non-contact IC card Download PDFInfo
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- CN204129763U CN204129763U CN201420407383.XU CN201420407383U CN204129763U CN 204129763 U CN204129763 U CN 204129763U CN 201420407383 U CN201420407383 U CN 201420407383U CN 204129763 U CN204129763 U CN 204129763U
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Abstract
The utility model relates to the anti-theft device of non-contact IC card, comprising: rf signal reception unit, reads signal, and radio frequency is read signal change into induction current for the radio frequency receiving NFC fetch equipment; Rectification unit, carries out rectification by the induction current be converted to; Undesired signal generation unit, produce Radio Frequency Interfere, and the Radio Frequency Interfere produced sends according to the signal after rectification.The anti-theft device circuit structure of the non-contact IC card that the utility model provides is simple, realizes cost low, non-contact IC effectively can be prevented to be stuck in when not using and stolen card internal information by lawless person by NFC fetch equipment.
Description
Technical field
The utility model relates to electronic anti-theft technical field, is specifically related to the anti-theft device of non-contact IC card.
Background technology
Along with the development of science and technology, the I.D., bank card, passport etc. of people replace to non-contact IC card gradually by magnetic stripe card.
At present, many lawless persons steal other people IC card information by NFC fetch equipment.As in crowded public transport, in the crowded crowd, shopping place etc., lawless person is by the I.D., bank card, passport etc. of NFC fetch equipment near victim's non-contact IC card-type, NFC fetch equipment just can read the information in the IC-card of victim easily, causes that the personal information data of victim is leaked, bank card information leakage etc.The IC card information of stealing is copied the IC bank card, IC I.D. etc. that make new advances by lawless person, and steals the wealth of victim with the IC bank card copied, or utilizes the information of stealing to carry out other illegal activity, brings loss in various degree to stolen taker.
Lawless person steals other people non-contact IC card information principle by NFC fetch equipment is specially: NFC fetch equipment sends specific radio frequency and reads signal, non-contact IC card receives after specific radio frequency reads signal and responds, and the data of self are launched by set frequency, NFC fetch equipment carries out analyzing and processing after receiving the feedback signal of non-contact IC card, obtain the information stored in non-contact IC card, finally realize stealing of non-contact IC card information.
Utility model content
The purpose of this utility model overcomes shortcomings and deficiencies of the prior art, provides a kind of anti-theft device of non-contact IC card, prevents NFC device from stealing the information of non-contact IC card.
The purpose of this utility model is achieved through the following technical solutions: the anti-theft device of non-contact IC card, is characterized in that, comprising:
Rf signal reception unit, reads signal for the radio frequency receiving NFC fetch equipment, and radio frequency is read signal changes into induction current;
Rectification unit, carries out rectification by the induction current be converted to;
Undesired signal generation unit, produce Radio Frequency Interfere, and the Radio Frequency Interfere produced sends according to the signal after rectification.
When non-contact IC card does not use, the anti-theft device of non-contact IC card is arranged near non-contact IC card.When NFC fetch equipment is near non-contact IC card, and when launching radio frequency reading signal, the rf signal reception unit received RF of the anti-theft device of non-contact IC card reads signal, and radio frequency is read signal convert induction current to, induction current inputs to undesired signal generation unit after rectification unit rectification, undesired signal generation unit produces corresponding Radio Frequency Interfere, and launches.In free surrounding space, described Radio Frequency Interfere and radio frequency read signal and mix and superpose, and the superimposed RF signal after mixing superposition inputs in non-contact IC card.The radio frequency before superposition can only be resolved due to non-contact IC card and read signal, cannot resolve radio frequency read signal superpose with Radio Frequency Interfere after radiofrequency signal, therefore, cannot produce after non-contact IC card receives superimposed RF signal and feed back radiofrequency signal accordingly, cause NFC device cannot the information of reading non-contact type IC card.
Particularly, described rf signal reception unit comprises one first inductive coil.
Particularly, described rectification unit is half-wave rectification unit.
Particularly, described rectification unit comprises one first diode, and the positive pole of the first diode is connected with the output terminal of rf signal reception unit, and negative pole is connected with the input end of undesired signal generation unit.
Particularly, described undesired signal generation unit comprises one first inductance, one second inductance, a triode, a resistance and an electric capacity, described resistance and electric capacity form parallel circuit, one end of parallel circuit is connected with the base stage of triode, the other end is connected and is connect the emitter of triode after the first inductance, the collector of triode is connected after the second inductance and is connected with base stage, connects the output terminal of rectification unit simultaneously.
Particularly, the anti-theft device of described non-contact IC card also comprises the indicating member be connected between rf signal reception unit and undesired signal generation unit.
Particularly, described indicating member comprises more than one light emitting diode.
Particularly, described rf signal reception unit also comprises one second inductive coil, and the series circuit that the series circuit that described second inductive coil and light emitting diode are formed and the first inductive coil and the first diode are formed is connected in parallel.
The utility model comprises following advantage and beneficial effect compared to existing technology: the anti-theft device circuit structure of the non-contact IC card that the utility model provides is simple, realize cost low, non-contact IC effectively can be prevented to be stuck in when not using and stolen card internal information by lawless person by NFC fetch equipment.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the anti-theft device of non-contact IC card in embodiment;
Fig. 2 is the circuit theory diagrams of the anti-theft device of non-contact IC card in embodiment;
Fig. 3 is the anti-theft device application schematic diagram of non-contact IC card.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
The anti-theft device of non-contact IC card, when non-contact IC card does not use and non-contact IC card near placing.As shown in Figure 1, the anti-theft device of described non-contact IC card comprises: rf signal reception unit, rectification unit, indicating member and undesired signal generation unit.Described rf signal reception unit reads signal for the radio frequency receiving NFC fetch equipment, and radio frequency is read signal changes into induction current; The induction current be converted to is carried out rectification by described rectification unit; Signal after the rectification of described undesired signal generation unit produces Radio Frequency Interfere, and the Radio Frequency Interfere produced sends.
As shown in Figure 3, when IC-card does not use, the anti-theft device of non-contact IC card is arranged near IC-card.When NFC fetch equipment is near IC-card, and when launching radio frequency reading signal, the rf signal reception unit received RF of the anti-theft device of non-contact IC card reads signal, and radio frequency is read signal convert induction current to, induction current inputs to undesired signal generation unit after rectification unit rectification, undesired signal generation unit produces corresponding Radio Frequency Interfere, and launches.In free surrounding space, described Radio Frequency Interfere and radio frequency read signal and mix and superpose, and the superimposed RF signal after mixing superposition inputs in IC-card.The radio frequency before superposition can only be resolved due to IC-card and read signal, cannot resolve radio frequency read signal superpose with Radio Frequency Interfere after radiofrequency signal, therefore, cannot produce after IC-card receives superimposed RF signal and feed back radiofrequency signal accordingly, cause NFC device cannot read the information of IC-card.
In the present embodiment, the particular circuit configurations of the anti-theft device of described non-contact IC card as shown in Figure 2.Described rf signal reception unit comprises the first inductive coil E1, the second inductive coil E2, and described rectification unit is the half-wave rectification unit be made up of one first diode D1.Described indicating member is made up of a light emitting diode D2.Described undesired signal generation unit comprises one first inductance L 1,1 second inductance L 2, triode Q1, an a resistance R1 and electric capacity C1.
Described resistance R1 and electric capacity C1 forms parallel circuit, one end of parallel circuit is connected with the base stage of triode Q1, the other end is connected and is connect the emitter of triode Q1 after the first inductance L 1, the collector of triode Q1 is connected after the second inductance L 2 and is connected with base stage, connect the negative pole of the first diode D1, the positive pole of the first diode D1 is connected with one end of the first inductive coil E1 simultaneously.The negative pole of described light emitting diode D2 is connected with the negative pole of the first diode D1, and positive pole is connected with one end of the second inductive coil E2, and the other end of the first inductive coil E1 and the other end of the second inductive coil E2 are all connected with the collector of triode Q1.
Radio frequency is read signal after reading signal and changes into induction current by described first inductive coil E1, the second inductive coil E2 received RF.The induction current that described second inductive coil E2 produces makes light emitting diode D2 glisten, and realizes alarm, and the induction current simultaneously produced with the first inductive coil E1 is input to the base stage of triode Q1 simultaneously.The oscillatory circuit that resistance R1, electric capacity C1 and inductance L 1 forms produces Radio Frequency Interfere, and Radio Frequency Interfere is transmitted in free surrounding space by the first inductance L 1 and the second inductance L 2.
The above embodiment only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (8)
1. the anti-theft device of non-contact IC card, is characterized in that, comprising:
Rf signal reception unit, reads signal for the radio frequency receiving NFC fetch equipment, and radio frequency is read signal changes into induction current;
Rectification unit, carries out rectification by the induction current be converted to;
Undesired signal generation unit, produce Radio Frequency Interfere, and the Radio Frequency Interfere produced sends according to the signal after rectification.
2. the anti-theft device of non-contact IC card according to claim 1, is characterized in that: described rf signal reception unit comprises one first inductive coil.
3. the anti-theft device of non-contact IC card according to claim 1, is characterized in that: described rectification unit is half-wave rectification unit.
4. the anti-theft device of non-contact IC card according to claim 3, it is characterized in that: described rectification unit comprises one first diode, the positive pole of the first diode is connected with the output terminal of rf signal reception unit, and negative pole is connected with the input end of undesired signal generation unit.
5. the anti-theft device of non-contact IC card according to claim 1, it is characterized in that: described undesired signal generation unit comprises one first inductance, one second inductance, a triode, a resistance and an electric capacity, described resistance and electric capacity form parallel circuit, one end of parallel circuit is connected with the base stage of triode, the other end is connected and is connect the emitter of triode after the first inductance, the collector of triode is connected after the second inductance and is connected with base stage, connects the output terminal of rectification unit simultaneously.
6. the anti-theft device of non-contact IC card according to claim 1, is characterized in that: also comprise the indicating member be connected between rf signal reception unit and undesired signal generation unit.
7. the anti-theft device of non-contact IC card according to claim 6, is characterized in that: described indicating member comprises more than one light emitting diode.
8. the anti-theft device of non-contact IC card according to claim 7, it is characterized in that: described rf signal reception unit also comprises one second inductive coil, the series circuit that the series circuit that described second inductive coil and light emitting diode are formed and the first inductive coil and the first diode are formed is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407383.XU CN204129763U (en) | 2014-07-22 | 2014-07-22 | The anti-theft device of non-contact IC card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407383.XU CN204129763U (en) | 2014-07-22 | 2014-07-22 | The anti-theft device of non-contact IC card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204129763U true CN204129763U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420407383.XU Expired - Fee Related CN204129763U (en) | 2014-07-22 | 2014-07-22 | The anti-theft device of non-contact IC card |
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| Country | Link |
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| CN (1) | CN204129763U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156754B (en) * | 2014-07-22 | 2017-08-25 | 赵伊宁 | The anti-theft device of non-contact IC card |
| CN109409155A (en) * | 2018-10-19 | 2019-03-01 | 湖北用芯物联科技有限公司 | A kind of radio frequency signal shield circuit and shield card |
| WO2020052285A1 (en) * | 2018-09-10 | 2020-03-19 | 李文昌 | Radio frequency identification circuit and contact-less ic card anti-theft device |
-
2014
- 2014-07-22 CN CN201420407383.XU patent/CN204129763U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156754B (en) * | 2014-07-22 | 2017-08-25 | 赵伊宁 | The anti-theft device of non-contact IC card |
| WO2020052285A1 (en) * | 2018-09-10 | 2020-03-19 | 李文昌 | Radio frequency identification circuit and contact-less ic card anti-theft device |
| CN109409155A (en) * | 2018-10-19 | 2019-03-01 | 湖北用芯物联科技有限公司 | A kind of radio frequency signal shield circuit and shield card |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20190722 |