CN203149603U - Identification reader-writer for T5557 radio frequency cards - Google Patents

Identification reader-writer for T5557 radio frequency cards Download PDF

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Publication number
CN203149603U
CN203149603U CN 201320025630 CN201320025630U CN203149603U CN 203149603 U CN203149603 U CN 203149603U CN 201320025630 CN201320025630 CN 201320025630 CN 201320025630 U CN201320025630 U CN 201320025630U CN 203149603 U CN203149603 U CN 203149603U
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China
Prior art keywords
signal
module
write line
read write
identification read
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CN 201320025630
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Chinese (zh)
Inventor
赵烽
金华
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Third Research Institute of the Ministry of Public Security
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Third Research Institute of the Ministry of Public Security
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Abstract

The utility model provides an identification reader-writer for T5557 radio frequency cards. The identification reader-writer comprises a control device (1), a matching network module (5) and an antenna module (6), wherein the control device (1) consists of a signal transmitting unit and a signal receiving unit, the signal transmitting unit and the signal receiving unit are connected with the antenna module (6) through the matching network module (5), and the signal transmitting unit includes a signal generator generating square waves of which the frequency is 125KHz. The identification reader-writer for T5557 radio frequency cards, provided by the utility model, adopts technologies such as the inductive coupling technology, an LC series-parallel resonant circuit, a multilevel power amplification circuit and a filter circuit, long-distance card reading for T5557 radio frequency cards is realized, and the card reading distance can be larger than 50cm.

Description

The identification read write line that is used for T5557 type radio-frequency card
Technical field
The utility model relates to the wireless communication technical field, relates in particular to a kind of identification read write line of the T5557 type radio-frequency card for radio-frequency (RF) identification (RFID) system 125KHz frequency range.
Background technology
REID is a kind of non-contact automatic identification technology that utilizes radio communication to realize, is called electronic label technology again, is a kind of automatic identification technology of innovation.It is core with wireless communication technology, large scale integrated circuit technology, utilize the coupling of radiofrequency signal and space thereof, transport property, realization is to the automatic identification of static or moving target, obtain the target information data efficiently, can realize the tracking of global range internal object and sharing of information by the combination with technology such as internet.
Typical rfid system comprises radio-frequency (RF) tag, read write line, computer equipment.To form electromagnetic field, in order to activate radio-frequency (RF) tag, this electromagnetic field makes radio-frequency (RF) tag return the radiofrequency signal of the information of carrying to transmitter in the read write line by antenna output radiofrequency signal.Receiver in the read write line carries out demodulation by the radiofrequency signal to the information of carrying, and realizes data extract.
T5557 type radio-frequency card belongs to the 125KHz low-frequency range in rfid system, works for the inductive coupling mode between radio-frequency card and read write line.Read write line at this radio-frequency card all is the miniwatt read write line in the market, and the Card Reader distance is all less than 10cm, and existing read write line can't be applied directly to needs long application scenario apart from Card Reader, has therefore limited the range of application of this type of read write line.
The utility model content
At the deficiencies in the prior art part, the utility model provides an identification read write line that is exclusively used in T5557 type radio-frequency card, and this identification read write line has solved the application problem of T5557 type radio-frequency card length apart from Card Reader.
To achieve these goals, the technology that the utility model adopts is a kind of identification read write line for T5557 type radio-frequency card, comprise control device (1), matching network module (5) and Anneta module (6), described control device (1) comprises signal transmitter unit and signal receiving unit, described signal transmitter unit is connected with Anneta module (6) by matching network module (5), and described signal receiving unit is connected with Anneta module (6) by matching network module (5); Described signal transmitter unit comprises that producing frequency is the signal generator of 125KHz square wave.
In the preferred embodiment that the utility model provides, also comprise in the wherein said identification read write line and promote level module (3) and power amplifier level module (4), the described level module (3) that promotes is amplified the signal that described signal transmitter unit produces, promotion level module (3) is transported to the described signal through amplifying in the power amplifier level module (4) carries out power amplification, and power amplifier level module (4) will export in the matching network module (5) through the described signal of amplifying power.
In the preferred embodiment that the utility model provides, also comprise detecting circuit module (7) in the wherein said identification read write line, described detecting circuit module (7) will enter that signal carries out detection in the matching network module (5), be transported to the described signal receiving unit from detecting circuit module (7) through the described signal of detection.
In the preferred embodiment that the utility model provides, also comprise amplifying circuit module (8) in the wherein said identification card reader, described amplifying circuit module (8) is amplified detecting circuit module (7) output signal, and the described signal through amplifying is transported in the described signal receiving unit.
In the preferred embodiment that the utility model provides, wherein said identification read write line also comprises filtering circuit module (9), described filtering circuit module (9) is carried out filtering with amplifying circuit module (8) output signal, is transported in the described signal receiving unit through the described signal of filtering.
In the preferred embodiment that the utility model provides, wherein said control device is mainly formed by single-chip microcomputer.
In the preferred embodiment that the utility model provides, wherein said signal receiving unit is mainly formed by the A/D sampling module.
Compared with prior art, the identification read write line that is used for T5557 type radio-frequency card that the utility model provides adopts technology such as inductive coupling technology, LC series parallel resonance circuit, multistage power amplification circuit, filtering circuit, realized length at T5557 type radio-frequency card apart from Card Reader, the Card Reader distance can reach greater than 50cm.
Description of drawings
Fig. 1 is the connecting frame figure of the identification read write line that provides of the utility model.
Embodiment
A kind of identification read write line with long Card Reader distance that the utility model provides adopts technology such as inductive coupling technology, LC series parallel resonance circuit, multistage power amplification circuit, filtering circuit, has solved the application problem of T5557 type radio-frequency card length apart from Card Reader.
The identification card reader that the utility model is provided is described in further detail by the following examples, in order to better understand the content of the invention, but the content of embodiment does not limit the protection domain of the invention.
As described in Figure 1, be divided into transmit passage and reception signalling channel two parts in the identification card reader that the utility model provides.
In transmission channel, by one-chip computer module/MCU(1) upward signal transmitter unit output frequency is the square-wave signal fc(2 of 125KHz), this square-wave signal exports to and promotes to amplify in advance in the level module (3), and the signal after amplifying exports in the power amplifier level module (4) and carries out power amplification.Signal exported in the matching network module (5) again carry out impedance matching, at last signal loading is gone up and the output radiofrequency signal to Anneta module (6).The radiofrequency signal of output is to form electromagnetic field, in order to activate radio-frequency (RF) tag.
In receiving cable, the radiofrequency signal of carrying information enters in the detecting circuit module (7) through Anneta module (6), matching network module (5) carries out detection.Because radio-frequency card adopts load-modulate, the useful signal amplitude can be very little, and can be covered by the aerial voltage up to last hectovolt, thereby need to adopt the amplifying circuit module (8) with high-gain that small useful signal is amplified after detection.Again the signal after amplifying is transported in the filtering circuit module (9) and carries out filtering, deliver to one-chip computer module (1) at last again thus on signal receiving unit carry out A/D and gather and realize information decoding.
More than specific embodiment of the utility model is described in detail, but it is as example, the utility model is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and substituting also all among category of the present utility model.Therefore, not breaking away from impartial conversion and the modification of doing under the spirit and scope of the present utility model, all should be encompassed in the scope of the present utility model.

Claims (7)

1. an identification read write line that is used for T5557 type radio-frequency card is characterized in that comprise control device (1), matching network module (5) and Anneta module (6), described control device (1) comprises signal transmitter unit and signal receiving unit,
Described signal transmitter unit is connected with Anneta module (6) by matching network module (5), and described signal receiving unit is connected with Anneta module (6) by matching network module (5);
Described signal transmitter unit comprises that producing frequency is the signal generator of 125KHz square wave.
2. according to the identification read write line shown in the claim 1, it is characterized in that, also comprise in the described identification read write line and promote level module (3) and power amplifier level module (4), the described level module (3) that promotes is amplified the signal that described signal transmitter unit produces, promotion level module (3) is transported to the described signal through amplifying in the power amplifier level module (4) carries out power amplification, and power amplifier level module (4) will export in the matching network module (5) through the described signal of amplifying power.
3. according to the identification read write line shown in the claim 1, it is characterized in that, also comprise detecting circuit module (7) in the described identification read write line, described detecting circuit module (7) will enter that signal carries out detection in the matching network module (5), be transported to the described signal receiving unit from detecting circuit module (7) through the described signal of detection.
4. according to the identification read write line shown in the claim 3, it is characterized in that, also comprise amplifying circuit module (8) in the described identification card reader, described amplifying circuit module (8) is amplified detecting circuit module (7) output signal, and the described signal through amplifying is transported in the described signal receiving unit.
5. according to the identification read write line shown in the claim 4, it is characterized in that, described identification read write line also comprises filtering circuit module (9), described filtering circuit module (9) is carried out filtering with amplifying circuit module (8) output signal, is transported in the described signal receiving unit through the described signal of filtering.
6. according to the identification read write line shown in the claim 1, it is characterized in that described control device is mainly formed by single-chip microcomputer.
7. according to the identification read write line shown in the claim 1, it is characterized in that described signal receiving unit is mainly formed by the A/D sampling module.
CN 201320025630 2013-01-17 2013-01-17 Identification reader-writer for T5557 radio frequency cards Active CN203149603U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320025630 CN203149603U (en) 2013-01-17 2013-01-17 Identification reader-writer for T5557 radio frequency cards

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Application Number Priority Date Filing Date Title
CN 201320025630 CN203149603U (en) 2013-01-17 2013-01-17 Identification reader-writer for T5557 radio frequency cards

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104504420A (en) * 2014-12-19 2015-04-08 桂林电子科技大学 Passive transponder based on magnetic coupling induction
CN104899534A (en) * 2015-05-28 2015-09-09 福建联迪商用设备有限公司 Non-contact type card reader
CN105749372A (en) * 2014-12-17 2016-07-13 南通市第人民医院 Monitoring device for configuring liquid medicine information
CN107832811A (en) * 2017-10-31 2018-03-23 公安部第三研究所 The high-power read write line of low frequency global function for radio frequency identification

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105749372A (en) * 2014-12-17 2016-07-13 南通市第人民医院 Monitoring device for configuring liquid medicine information
CN104504420A (en) * 2014-12-19 2015-04-08 桂林电子科技大学 Passive transponder based on magnetic coupling induction
CN104899534A (en) * 2015-05-28 2015-09-09 福建联迪商用设备有限公司 Non-contact type card reader
CN104899534B (en) * 2015-05-28 2017-12-08 福建联迪商用设备有限公司 A kind of Non-contact Media Reader
CN107832811A (en) * 2017-10-31 2018-03-23 公安部第三研究所 The high-power read write line of low frequency global function for radio frequency identification

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