CN202033757U - Radio frequency induction lock and card-reading module thereof - Google Patents
Radio frequency induction lock and card-reading module thereof Download PDFInfo
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- CN202033757U CN202033757U CN2010202736163U CN201020273616U CN202033757U CN 202033757 U CN202033757 U CN 202033757U CN 2010202736163 U CN2010202736163 U CN 2010202736163U CN 201020273616 U CN201020273616 U CN 201020273616U CN 202033757 U CN202033757 U CN 202033757U
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Abstract
The utility model discloses a radio frequency induction lock and a card-reading module thereof, comprising a microprocessor, a resonant circuit, an antenna, a detection circuit, a filtering circuit and an amplifying circuit, wherein, the microprocessor is used for outputting a carrier signal of specific frequency and processing a received data signal; the resonant circuit is used for generating a sinusoidal damping signal in resonance with the carrier signal; the antenna is used for radiating the sinusoidal damping signal to the air to activate a passive card and receiving the data signal fed by the passive card; the detection circuit is used for carrying out detection processing for the data signal received by the antenna; the filtering circuit is used for carrying out filtering processing for the detected data signal; and the amplifying circuit is used for carrying out power amplifying for the filtered and detected data signal to transmit to the microprocessor. The utility model chooses electronic components of low cost and a microprogramming chip and combines a reasonable circuit and a feasible program to commonly realize the same technical effect with a special base chip.
Description
[technical field]
The utility model relates to a kind of radio frequency induction lock that is applied to occasions such as hotel, hotel, high-end residential sub-district, relates in particular to card reading module wherein.
[technical background]
On the home market, the technology that the card reading module of radio frequency induction lock produces carrier wave is monopolized by external forerunner, technological core is mainly grasped in U.S. ATMEL and Switzerland EMI two company's hands, the model that the former produces is that the special IC (private base station chip) of U2270B and model that the latter produces are that the special IC (private base station chip) of EM4095 all can be realized card-reading function, and all be operated on the 125KHz frequency, occupy the domestic and international market of the overwhelming majority at present.
Obviously, the result of monopolization causes the height enterprise of product price, also causes state internal lock industry manufacturer's manufacturing cost can not to be in any more thus, and, because the supply shortage phenomenon often appears in the underproductiving of aforementioned two companies, has had a strong impact on the ordinary production of the relevant industries that depend on these chips.
Although highly integrated circuit has its convenient part, bring the raising of manufacturing cost and produce that supply falls short of demand, obviously do not meet market discipline.
Technically, the barrier that this two company constitutes in the patent of first to file and the complicacy of integrated circuit high integration have influenced domestic colleague's adding, therefore, directly research and develop the special IC that can produce the 125KHz carrier signal voluntarily and both belonged to the duplication of labour, also do not meet the competition requirement in market.Tend to seek a kind of lower cost solution of alternative such special IC in the industry.
[utility model content]
The purpose of this utility model just is being to provide a kind of card reading module of radio frequency induction lock, strives for realizing and have the equal technique effect of known technology with lower cost;
Another purpose of the present utility model is to provide a kind of radio frequency induction lock, its cost is reduced relatively, and the function that is realized is constant.
For realizing this purpose, the utility model adopts following technical scheme:
The card reading module of radio frequency induction lock of the present utility model comprises: microprocessor is used to export the carrier signal of characteristic frequency and handles the data-signal that receives; Resonant circuit is used to produce the sinusoidal damping vibration attenuation signal with this carrier signal phase resonance; Antenna, be used for to aerial radiation should sine damping vibration attenuation signal activating passive card, and receive passive card feedback data signal; Detecting circuit is used for that the data-signal that antenna receives is carried out detection and handles; Filtering circuit is used for the data-signal after the detection is carried out Filtering Processing; Amplifying circuit is used for the data-signal behind the detection filter is carried out power amplification, to be transferred to described microprocessor.
Concrete, be serially connected with the resistance (R14) that is used for current limliting between described resonant circuit and the microprocessor.Described resonant circuit comprises inductance (ANT1) and electric capacity (C8), and this inductance (ANT1) uses as described antenna simultaneously.
Preferable, this module also comprises a negative circuit, is serially connected with the data-signal that is used between amplifying circuit and the microprocessor after amplifying and carries out anti-phase.
For reducing cost, described resonant circuit, detecting circuit, filtering circuit, amplifying circuit or negative circuit comprise at least one electronic devices and components.Described microprocessor is a singlechip chip.
For adding strong adaptability, the frequency of the carrier signal of described microprocessor output is defined as 125KHz.
For ease of realizing, the port that described microprocessor is used to export the characteristic frequency carrier signal is its timer port.
Radio frequency induction lock of the present utility model comprises aforesaid card reading module and passive card, and carrier signal of card reading module transmission is used to activate passive card work and to card reading module feedback data signal, card reading module is further handled this data-signal.
Compared with prior art, the utlity model has following advantage: the utility model is simple in structure, be easy to realize, by adopting the economical product of single-chip microcomputer in conjunction with known electronic devices and components (diode, triode, resistance, inductance and electric capacity etc.) and so on, can realize and the external equal function of private base station chip in conjunction with program design at single-chip microcomputer, not only overcome the harsh shortcoming of working condition, also greatly reduce production cost, make and reduce greatly based on the radio frequency induction lock of radio-frequency technique and the whole cost of corresponding miscellaneous equipment.
[description of drawings]
Fig. 1 is the circuit diagram of card reading module of the radio frequency induction lock of the primary embodiment of the utility model;
Fig. 2 is the circuit diagram of card reading module of the radio frequency induction lock of another embodiment of the utility model.
[embodiment]
Below in conjunction with drawings and Examples the utility model is further described:
Consult Fig. 1, it shows the circuit structure of the card reading module of the utility model radio frequency induction lock, be applied in the known radio frequency induction lock, activate passive card by this card reading module to aerial radiation carrier signal, passive card in cycle regular hour realize reading and writing data between self and the card reading module by data-signal being fed back to card reading module, realize that thus the non-contact signal between card reading module and the passive card is mutual.
The model that the microprocessor of Fig. 1 adopts Philips company to produce is the singlechip chip of 87LPC767, and its I/O mouth supports low level to drive, and promptly supports to irritate current drives.Adapt to this this card reading module of characteristics design, this card reading module is made of this microprocessor and current-limiting resistance, resonant circuit, antenna, detecting circuit, filtering circuit, amplifying circuit and negative circuit etc.
Microprocessor is integrated with corresponding program, is used for producing the square wave carrier signal that frequency is 125KHz by its timer port (being labeled as P0.7).
Current-limiting resistance R14 one end is connected with the timer port of microprocessor, and the other end is connected with resonant circuit, plays metering function.Described resonant circuit is made up of inductance ANT1 that is connected in series with current-limiting resistance R14 and capacitor C 8, capacitor C 8 other end ground connection.Suitably adjust the resistance value of inductance ANT1 and choose suitable capacitor C 8, can make thus the LC series resonant circuit formed reach resonance during for 125KHz in frequency, thereby producing frequency is the sinusoidal damping vibration attenuation carrier signal of 125KHz, through inductance ANT1 to aerial radiation so that activate passive card.
This shows that inductance ANT1 also independently takes on antenna to realize mutual effect with passive card except constituting jointly the series resonant circuits with capacitor C 8.This antenna not only has the function of the carrier signal that produces to aerial radiation microprocessor, and can be used for receiving the passive card back feedback data signal that is activated.
The data-signal that receives by antenna ANT1 is detected circuit and further handles, detecting circuit is by detector diode D3, D4, current-limiting resistance R13 and capacitor C 3 are formed jointly, are demodulated the data-signal that demodulates from the faint electromagnetic wave that antenna ANT1 receives from passive card by detecting circuit.By the data-signal after the demodulation further by the filtering circuit filtering clutter interference of forming jointly by resistance R 17 and C9, then, filtered data-signal is amplified by an amplifying circuit, this amplifying circuit is made of jointly coupling capacitance C7, current-limiting resistance R18, first order amplifying triode P3 and biasing resistor R19 thereof and R20, amplifying circuit with this filtering after data-signal be amplified to suitable size further handle so that offer microprocessor.
The I/O mouth of the 87LPC767 singlechip chip that the adaptation microprocessor is selected for use is supported the characteristic that low level drives, utilize the anti-phase P0.5 port that just is transferred to microprocessor afterwards of data-signal after an anti-phase triode N1 will amplify as negative circuit, data-signal from the passive card sheet can be sent to microprocessor and carry out the Manchester code decoding, so that the corresponding status command of the final output of microprocessor is to implement further control.
The collection of illustrative plates that records according to oscillograph shows that the card reading module of present embodiment is in 100KHz～150KHz frequency range, and in the time of specifically near 125KHz, the emissive power of antenna ANT1 reaches maximal value.
As seen, because the utility model adopts cheap electronic devices and components and singlechip chip to substitute present private base station chip on the market, can make based on this kind card reading module comprise radio frequency induction in being locked in the cost of series products be minimized, the market competitiveness is promoted thus.
Fig. 2 has further disclosed another embodiment of the present utility model, it is different from last embodiment part and is: the model that the microprocessor of present embodiment has adopted AVR company to produce is the single-chip microcomputer of ATMEGA8, its I/O mouth characteristic is to support high level to drive, promptly support to draw current drives, therefore, omitted the negative circuit that last embodiment disclosed.
Although among the embodiment that Fig. 2 disclosed, the label of electronic devices and components and concrete connectivity port title are slightly different, but do not influence those skilled in the art's reading, circuit theory still is same as last embodiment among this embodiment, not unconventional connotation of the present utility model.
In sum, the utility model selects for use cheap electronic devices and components and little process chip in conjunction with reasonably circuit and feasible program have realized and the equal technique effect of private base station chip jointly.
Above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model, therefore, although this instructions has been described in detail the utility model with reference to each above-mentioned embodiment, but, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (9)
1. the card reading module of radio frequency induction lock is characterized in that it comprises:
Microprocessor is used to export the carrier signal of characteristic frequency and handles the data-signal that receives;
Resonant circuit is used to produce the sinusoidal damping vibration attenuation signal with this carrier signal phase resonance;
Antenna, be used for to aerial radiation should sine damping vibration attenuation signal activating passive card, and receive passive card feedback data signal;
Detecting circuit is used for that the data-signal that antenna receives is carried out detection and handles;
Filtering circuit is used for the data-signal after the detection is carried out Filtering Processing;
Amplifying circuit is used for the data-signal behind the detection filter is carried out power amplification, to be transferred to described microprocessor.
2. the card reading module of radio frequency induction lock according to claim 1 is characterized in that: be serially connected with the resistance (R14) that is used for current limliting between described resonant circuit and the microprocessor.
3. the card reading module of radio frequency induction lock according to claim 2, it is characterized in that: described resonant circuit comprises inductance (ANT1) and electric capacity (C8), this inductance (ANT1) uses as described antenna simultaneously.
4. the card reading module of radio frequency induction lock according to claim 1, it is characterized in that: this module also comprises a negative circuit, is serially connected with the data-signal that is used between amplifying circuit and the microprocessor after amplifying and carries out anti-phase.
5. according to the card reading module of any described radio frequency induction lock in the claim 1 to 4, it is characterized in that: described resonant circuit, detecting circuit, filtering circuit, amplifying circuit or negative circuit comprise at least one electronic devices and components.
6. according to the card reading module of any described radio frequency induction lock in the claim 1 to 4, it is characterized in that: the frequency of the carrier signal of described microprocessor output is defined as 125KHz.
7. according to the card reading module of any described radio frequency induction lock in the claim 1 to 4, it is characterized in that: described microprocessor is a singlechip chip.
8. according to the card reading module of any described radio frequency induction lock in the claim 1 to 4, it is characterized in that: the port that described microprocessor is used to export the characteristic frequency carrier signal is its timer port.
9. a radio frequency induction is locked, comprise card reading module and passive card, it is characterized in that described card reading module adopts as any one described card reading module in the claim 1 to 8, carrier signal of card reading module transmission is used to activate passive card work and to card reading module feedback data signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202736163U CN202033757U (en) | 2010-07-28 | 2010-07-28 | Radio frequency induction lock and card-reading module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202736163U CN202033757U (en) | 2010-07-28 | 2010-07-28 | Radio frequency induction lock and card-reading module thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202033757U true CN202033757U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202736163U Expired - Fee Related CN202033757U (en) | 2010-07-28 | 2010-07-28 | Radio frequency induction lock and card-reading module thereof |
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| CN (1) | CN202033757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231182A (en) * | 2010-07-28 | 2011-11-02 | 广东顶固集创家居股份有限公司 | Radio frequency induction lock and reading card module |
-
2010
- 2010-07-28 CN CN2010202736163U patent/CN202033757U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231182A (en) * | 2010-07-28 | 2011-11-02 | 广东顶固集创家居股份有限公司 | Radio frequency induction lock and reading card module |
| CN102231182B (en) * | 2010-07-28 | 2014-08-27 | 广东顶固集创家居股份有限公司 | Radio frequency induction lock and reading card module |
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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 |
Granted publication date: 20111109 Termination date: 20150728 |
|
| EXPY | Termination of patent right or utility model |