CN202904590U - Extending device, reading head device and reading head extending system - Google Patents
Extending device, reading head device and reading head extending system Download PDFInfo
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- CN202904590U CN202904590U CN 201220331129 CN201220331129U CN202904590U CN 202904590 U CN202904590 U CN 202904590U CN 201220331129 CN201220331129 CN 201220331129 CN 201220331129 U CN201220331129 U CN 201220331129U CN 202904590 U CN202904590 U CN 202904590U
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Abstract
The embodiment of the utility model discloses an extending device, a reading head device and a reading head extending system. The method of the embodiment of the utility model comprises a first antenna 20, a processor 40 and a second antenna 24, wherein the first antenna receives a downlink signal which is obtained by synthesizing a first local oscillation signal and a first frequency mixing signal and sent by the reading head device, the processor 40 restores the downlink signal received from the first antenna 20 by a receiving unit 401, and sends the restored signal to an RFID card by the second antenna 24, thus the RFID card responses to the downlink signal and sends an uplink signal to the reading head device. The extending device is added to restore the downlink signal, and the channel of the downlink signal is changed, thus the division channel transmission of the uplink signal and the downlink signal is realized, the sensitivity of the reading head is improved, the reading efficiency is ensured while extending the reading range, and moreover the use number of the reading head is reduced.
Description
Technical field
The utility model relates to the communications field, relates in particular to a kind of expanding unit, reading head arrangement and read head expanding system.
Background technology
Radio-frequency (RF) identification (RFID, Radio Frequency IDentification) technology can be identified specific objective and read and write related data by radio signals, and need not to set up machinery between recognition system and the specific objective or optics contacts.Concrete, the RFID technology comprises interrogator and transponder, after transponder enters magnetic field, receive the radiofrequency signal that interrogator sends, the energy that relies on induction current to obtain sends out the product information that is stored in the chip, perhaps initiatively send the signal of a certain frequency, after interrogator reading information and the decoding, deliver to CIS and carry out the relevant data processing.
The RFID technology has been made an inventory and has been produced many industries such as spool reason at logistics, transportation, parking lot, article at present and has been widely used.But the receiving sensitivity of RFID technology self is poor, and the scope of its covering is very limited, in a lot of industries the inside, for the scope that extended RFID reads, needs to adopt some expansion techniques to realize the covering of RFID technology.
At present, prior art mainly is the method by control radio-frequency (RF) switch minute multichannel, and then the mode by antenna pulling away realizes that the large tracts of land of RFID technology covers.
Inventor of the present utility model finds in the research and practice process to prior art, and prior art has three shortcomings:
The first, because the intrinsic loss of radio-frequency (RF) switch can't be avoided, can not divide too many road, what radio-frequency (RF) switch minute multichannel can cause signal comes echo attenuation excessive, and reading efficiency descends;
The second, antenna pulling away has increased difficulty of construction, and simultaneously so that the signal attenuation of antenna itself, antenna is oversize also can to cause reading efficiency decline;
Three, when opening multiplex operation simultaneously, the distribution of signal also can cause signal attenuation to strengthen, and causes degradation problem under the reading efficiency.
The utility model content
The utility model embodiment provides a kind of expanding unit, reading head arrangement and read head expanding system, is used for improving the sensitivity of read head, guarantees reading efficiency, reduces the usage quantity of read head.
A kind of expanding unit comprises: the first antenna 20, processor 40 and the second antenna 24; Described the first antenna 20 is used for receiving the downgoing signal that described reading head arrangement sends, and described downgoing signal is the first local oscillation signal and the first frequency variation signal to be closed rood arrive; Described processor 40 is used for the downgoing signal reduction that the first antenna 20 is received; Described the second antenna 24 is used for the downgoing signal of processor 40 reduction is sent to the radio frequency discrimination RFID card, so that described rfid card responds and upward signal is sent to described reading head arrangement.
A kind of reading head arrangement comprises: combiner 4, antenna 9 and RFID read head 1; Described combiner 4 is used for obtaining the first local oscillation signal and the first frequency variation signal, and described the first local oscillation signal and the first frequency variation signal is closed the road, obtains closing the downgoing signal behind the road; Described antenna 9, be used for the downgoing signal that described combiner 4 closes behind the road is sent to expanding unit, so that expanding unit reduces described downgoing signal, and the downgoing signal of reduction sent to the radio frequency discrimination RFID card, so that described rfid card response concurrent is served capable signal; Described RFID read head 1 is used for receiving the upward signal that rfid card sends.
A kind of read head expanding system comprises: rfid card, expanding unit and reading head arrangement; Described reading head arrangement obtains downgoing signal, and described downgoing signal is sent to expanding unit, and described downgoing signal is mixed frequency signal and local oscillation signal to be closed rood arrive; Described expanding unit receives the downgoing signal that reading head arrangement sends, and the described downgoing signal that receives is reduced, and the downgoing signal of reduction is sent to rfid card; Described rfid card responds the downgoing signal that described expanding unit sends, and upward signal is sent to described reading head arrangement.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages:
The utility model embodiment adopt that the first antenna 20 receives that reading head arrangements send by the first local oscillation signal and the first mixed frequency signal close rood to downgoing signal, by processor 40 downgoing signal that receiving element 401 first antennas 20 receive is reduced, and send to rfid card by the second antenna 24, so that rfid card responds this downgoing signal and upward signal is sent to reading head arrangement, the present embodiment has increased expanding unit, this expanding unit can reduce downgoing signal, the present embodiment can change the channel of downgoing signal, realize that the uplink and downlink signal divides transmission, the probability that makes downgoing signal scurry into upward signal reduces greatly, can improve the sensitivity of read head, in the expansion read range, guarantee reading efficiency, and reduced the usage quantity of read head.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a structural drawing of expanding unit among the utility model embodiment;
Fig. 2 is the schematic diagram of expanding unit among the utility model embodiment;
Fig. 3 is a structural drawing of reading head arrangement among the utility model embodiment;
Fig. 4 is the schematic diagram of reading head arrangement among the utility model embodiment;
Fig. 5 is a structural drawing of expanding system among the utility model embodiment;
Fig. 6 is the schematic diagram of rfid card among the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those skilled in the art are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of expanding unit, reading head arrangement and read head expanding system, is used for improving sensitivity, guarantees reading efficiency, reduces the usage quantity of read head.Below describe in detail respectively.See also Fig. 1 to Fig. 6:
Embodiment one
The present embodiment provides a kind of expanding unit.For example, this expanding unit is specifically as follows the expansion module of radio-frequency card reader, it should be noted that, this expanding unit is not specifically done restriction.Wherein, see also Fig. 1, this expanding unit specifically can comprise: the first antenna 20, processor 40 and the second antenna 24.
Wherein, the first antenna 20 can be used for receive the downgoing signal that reading head arrangement sends, and downgoing signal is the first local oscillation signal and the first frequency variation signal to be closed rood arrive;
Wherein, processor 40 can be used for the downgoing signal reduction that the first antenna 20 is received;
Wherein, the second antenna 24 can be used for the downgoing signal of processor 40 reduction is sent to the RFID card, so that rfid card responds and upward signal is sent to reading head arrangement.
Wherein, can reduce to the downgoing signal that receives in the following manner: at first the downgoing signal that receives is carried out shunt, obtain the second local oscillation signal and the second frequency variation signal, the second local oscillation signal is coupled, the second local oscillation signal and the second frequency variation signal after the coupling are carried out mixing, the downgoing signal that obtains reducing.
Concrete, seeing also Fig. 2, Fig. 2 is a schematic diagram of expanding unit in the present embodiment, optional, processor 40 can comprise: shunt 15, coupling mechanism 27 and frequency mixer 19.
Optionally, an end of shunt 15 output terminals is connected with coupling mechanism 27, and the other end is connected with frequency mixer 19, and coupling mechanism 27 is connected with frequency mixer 19;
Optionally, shunt 15 is used for downgoing signal is carried out shunt, obtains the second local oscillation signal and the second frequency variation signal;
Optionally, coupling mechanism 27 is used for the second local oscillation signal coupling after shunt 15 shunt;
Optionally, frequency mixer 19 is used for the second local oscillation signal and the second frequency variation signal after coupling mechanism 27 couplings are carried out mixing, the downgoing signal that obtains reducing.
Optionally, the second local oscillation signal after will being coupled and the second frequency variation signal carry out after the mixing, can also carry out filtering and amplification to the second local oscillation signal after the mixing and the second frequency variation signal, obtain the downgoing signal of the reduction behind the filter and amplification.
Wherein, see also Fig. 2, processor 40 can also comprise: wave filter 28 and power amplifier 18.Optionally, wave filter 28 is used for the second local oscillation signal after the mixing and the second frequency variation signal are carried out filtering, and power amplifier 18 is used for wave filter 28 filtered the second local oscillation signals and the second frequency variation signal are amplified.
Wherein, for downgoing signal being taked corresponding compensate function, guarantee the stability of downgoing signal, the second local oscillation signal after will being coupled and the second frequency variation signal carry out before the mixing, adopt the ALC control circuit that downgoing signal is compensated, also improve the sensitivity that signal receives so that the second local oscillation signal and the second frequency variation signal can increase an amplifying circuit before mixing.
Wherein, processor 40 can also comprise ALC control circuit 13, ALC control circuit 13 can carry out level control to downgoing signal, wherein, the mixing power that ALC control circuit 13 can detect specifically whether local oscillation power equals that the second local oscillation signal is coupled and carry out mixing with the second frequency variation signal, if, the pad value of locking downgoing signal, if not, local oscillation power adjusted to equal mixing power, and the pad value of locking downgoing signal.
As from the foregoing, the utility model embodiment adopt that the first antenna 20 receives that reading head arrangements send by the first local oscillation signal and the first mixed frequency signal close rood to downgoing signal, by processor 40 downgoing signal that receiving element 401 first antennas 20 receive is reduced, and send to rfid card by the second antenna 24, so that rfid card responds this downgoing signal and upward signal is sent to reading head arrangement, the present embodiment has increased expanding unit, this expanding unit can reduce downgoing signal, the present embodiment can change the channel of downgoing signal, realize that the uplink and downlink signal divides transmission, the probability that makes downgoing signal scurry into upward signal reduces greatly, can improve the sensitivity of read head, in the expansion read range, guarantee reading efficiency, and reduced the usage quantity of read head.
Embodiment two
The present embodiment provides a kind of reading head arrangement.For example, this reading head arrangement is specifically as follows the read head module of radio-frequency card reader, it should be noted that, this reading head arrangement is not specifically done restriction.Wherein, see also Fig. 3, this reading head arrangement specifically can comprise: combiner 4, antenna 9 and RFID read head 1.
Wherein, combiner 4 can be used for obtaining the first local oscillation signal and the first frequency variation signal, and the first local oscillation signal and the first frequency variation signal are closed the road, obtains closing the downgoing signal behind the road;
Wherein, antenna 9 can be used for the downgoing signal that combiner 4 closes behind the road is sent to expanding unit, so that expanding unit reduces downgoing signal, and sends to the radio frequency discrimination RFID card with the downgoing signal of reduction, so that the rfid card response concurrent is served capable signal;
Wherein, RFID read head 1 can be used for receiving the upward signal that rfid card sends.
Optionally, see also Fig. 4, Fig. 4 is a schematic diagram of reading head arrangement in the present embodiment, and wherein, the reading head arrangement in the present embodiment can also comprise: mixting circuit 2, mixing amplifying circuit 3, local oscillation circuit 8 and local oscillator amplifying circuit 10.
Wherein, the read head of reading head arrangement can send a signal, and this signal can obtain first frequency variation signal through the mixting circuit of reading head arrangement; This signal that read head sends can obtain first local oscillation signal through local oscillator.After reading head arrangement obtains the first frequency variation signal and the first local oscillation signal, can the first frequency variation signal and the first local oscillation signal just be closed the road with a combiner, obtain closing the downgoing signal behind the road.Wherein, for amplifying signal, can before closing the road, the first frequency variation signal and the first local oscillation signal be carried out the signal amplification through an amplifying circuit respectively.
Concrete, an end of mixting circuit 2 is connected with RFID read head 1, and the other end is connected with mixing amplifying circuit 3, and mixting circuit 2 is used for generating the first frequency variation signal;
One end of local oscillation circuit 8 is connected with RFID read head 1, and the other end is connected with local oscillator amplifying circuit 10, and local oscillation circuit 8 is used for generating the first local oscillation signal;
Mixing amplifying circuit 3 is used for amplifying the first frequency variation signal, and mixing amplifying circuit 3 is used for amplifying the first local oscillation signal.
In addition, see also Fig. 4, the present embodiment can also comprise: amplifying circuit 6 and starter.
Wherein, in order to improve the sensitivity of upward signal,, after reading head arrangement sends upward signal, can the upward signal that rfid card sends be amplified through an amplifying circuit at rfid card, that is to say that amplifying circuit 6 is used for the upward signal that rfid card sends is amplified; Starter is used for the locking local oscillator, and judges whether expanding unit is opened, if expanding unit is opened, then starts reading head arrangement, if expanding unit is not opened, then starts expanding unit and starts reading head arrangement.
As from the foregoing, the utility model embodiment adopts combiner 4 to obtain the first local oscillation signal and the first frequency variation signal, and the first local oscillation signal and the first frequency variation signal closed the road, obtain closing the downgoing signal behind the road, by antenna 92 downgoing signal that combiner 4 closes behind the road is sent to expanding unit, so that expanding unit reduces downgoing signal, and with the reduction downgoing signal send to rfid card, so that the rfid card response concurrent is served capable signal, receive the upward signal that rfid card sends by RFID read head 1, the present embodiment has increased expanding unit, this expanding unit can reduce downgoing signal, the present embodiment can change the channel of downgoing signal, realizes that the uplink and downlink signal divides transmission, and the probability that makes downgoing signal scurry into upward signal reduces greatly, can improve the sensitivity of read head, in the expansion read range, guaranteed reading efficiency, and reduced the usage quantity of read head, and can add amplifying circuit at upward signal and improve receiving sensitivity.
Embodiment three
The present embodiment provides a kind of read head expanding system.For example, this read head expanding system is specifically as follows access control system, it should be noted that, this expanding system is not specifically done restriction.Wherein, see also Fig. 5, this expanding system specifically can comprise: reading head arrangement 601, expanding unit 602 and rfid card 603;
Wherein, reading head arrangement 601 obtains downgoing signal, and downgoing signal is sent to expanding unit 602, and downgoing signal is mixed frequency signal and local oscillation signal to be closed rood arrive, and wherein, reading head arrangement 601 specifically can be referring to Fig. 4;
Expanding unit 602 receives the downgoing signal that reading head arrangement 601 sends, and the downgoing signal that receives is reduced, and the downgoing signal of reduction is sent to rfid card, and wherein, expanding unit 602 specifically can be referring to Fig. 2;
It should be noted that, reading head arrangement 601 in the present embodiment can be any reading head arrangement in above-described embodiment, and the expanding unit 602 in the present embodiment can be any expanding unit in above-described embodiment, wherein, implementation can referring to above-described embodiment, repeat no more herein.
Wherein, below will illustrate briefly with the execution flow process work to this expanding system, as follows:
The downgoing signal that step 2, reading head arrangement 601 will close behind the road sends to expanding unit 602;
Step 3, expanding unit 602 receive the downgoing signal that reading head arrangement 601 sends;
Wherein, rfid card 603 responds and upward signal is sent to reading head arrangement 601;
Step 5, reading head arrangement 601 receive the upward signal that rfid card 603 sends, and the signal of finishing rfid card and RFID read head is mutual.
As from the foregoing, the expanding system of the present embodiment has increased expanding unit 602, this expanding unit 602 can reduce downgoing signal, the expanding system of the present embodiment can change the channel of downgoing signal, realize that the uplink and downlink signal divides transmission, the probability that makes downgoing signal scurry into upward signal reduces greatly, can improve the sensitivity of read head, in the expansion read range, guaranteed reading efficiency, and reduced the usage quantity of read head, and can add amplifying circuit at upward signal and improve receiving sensitivity.
Embodiment four
The below is elaborated to the technical solution of the utility model with a concrete application examples, for example, and specifically can be as follows:
The reading head arrangement of the present embodiment can be as shown in Figure 4, and this reading head arrangement specifically can comprise: RFID read head 1, mixting circuit 2, the descending amplifying circuit 3 of read head, combiner 4, read head coupled circuit 5, the up amplifying circuit 6 of read head, digital transmission module 7, local oscillation circuit 8, local oscillator amplifying circuit 10 and read head antenna 9.
Wherein, RFID read head 1 has connected mixting circuit 2 and has reached descending amplifying circuit 3, connected local oscillation circuit 8 and signal amplification circuit 10 thereof, has connected up amplifying circuit 6, has connected to count the road 7 that conducts electricity; Wherein, combiner 4 has connected coupled circuit 5 and antenna 9, has connected descending amplifying circuit 3, descending local oscillation circuit 10 and up amplifying circuit 6.
The expanding unit of the present embodiment can be as shown in Figure 2, and expanding unit specifically can comprise: the first antenna 20, expanding unit end entrance coupled circuit 11, attenuator circuit 12, shunt 15, descending frequency variation signal amplifying circuit 16, descending local oscillator amplifying circuit 17, mixting circuit 19, filtering circuit 28, power amplifier 18, local oscillation signal coupled circuit 27, detecting circuit 14, level are controlled ALC control circuit 13, are counted conduct electricity road 21, monolithic control system 22, power-supply management system 23, rfid card antenna 25 and rfid card 26.
The rfid card of the present embodiment comprises antenna 25 and rfid card as shown in Figure 6.
Wherein, the shunt 15 in the expanding unit has connected attenuator circuit 12, coupled circuit 11 and ALC control circuit 13, has also connected down mixes signal amplification circuit 16 and mixting circuit 19, has connected descending local oscillator amplifying circuit 17 and coupled circuit 27.Wherein, mixting circuit 19 has connected coupled circuit 27, filtering circuit 28 and power amplifier 18 and the second antenna 24, and monolithic system 22 has connected digital transmission module 21 and power management module 23.
Wherein, the power supply tube portion of the RFID read head 1 in the reading head arrangement can be to RFID read head module 2, mixting circuit 2, mixing amplifying circuit 3, local oscillation circuit 8, local oscillator amplifying circuit 10 and 7 power supplies of up amplifying circuit.
Wherein, the power management 23 in the expanding unit can to digital transmission module 21, Single Chip Microcomputer (SCM) system 22, ALC control circuit 13,, detecting circuit 14, amplifying circuit 16, amplifying circuit 17, mixting circuit 19 and power amplifier 18 power supplies.
In the work engineering, can start first reading head arrangement, then obtain the first mixed frequency signal and the first local oscillation signal.
Wherein, can take corresponding compensate function by 13 pairs of downgoing signals of ALC control circuit, guarantee the stability of downgoing signal, also improve the sensitivity that signal receives so that the second local oscillation signal and the second frequency variation signal can increase an amplifying circuit before mixing.
For example, RFID read head 1 sends a signal, it for example can be the signal that sends a 922M, through obtaining the frequency variation signal of a 2.4G behind mixting circuit 2 shift frequencies, amplified by amplifying circuit 3 again, this signal that RFID sends is through after the local oscillator 8, can obtain first local oscillation signal, combiner 4 closes the road with the first local oscillation signal and the first frequency variation signal, obtain a downgoing signal after closing the road, then by antenna 9 this downgoing signal is sent to expanding unit, the first antenna 20 in the expanding unit receives the downgoing signal that reading head arrangement sends, successively by shunt 15 along separate routes, amplifying circuit 16 amplifies, mixting circuit 19 reduction RFID signals, can obtain the signal of the 915M of a reduction, and after filtration wave circuit 28 filtering, after power amplifier 18 amplifies, by the second antenna 24 downgoing signal of this reduction is transmitted to rfid card, the RFID antenna 25 of rfid card receives the downgoing signal of the 915M of this reduction, rfid card 26 these downgoing signals of response also pass through upward signal of antenna 25 emissions to reading head arrangement, the antenna 9 of reading head arrangement receives this upward signal, by combiner 4, by amplifying circuit 6 amplifying signals, the RFID read head 1 in the reading head arrangement receives this upward signal.
Above a kind of expanding unit provided by the utility model, reading head arrangement and read head expanding system are described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for those skilled in the art, the thought according to the utility model embodiment all will change in specific embodiments and applications, and to sum up, this description should not be construed as restriction of the present utility model.
Claims (8)
1. an expanding unit is characterized in that, comprising:
The first antenna (20), processor (40) and the second antenna (24);
Described the first antenna (20) is used for receiving the downgoing signal that described reading head arrangement sends, and described downgoing signal is the first local oscillation signal and the first frequency variation signal to be closed rood arrive;
Described processor (40) is used for the downgoing signal reduction that the first antenna (20) is received;
Described the second antenna (24) is used for the downgoing signal of processor (40) reduction is sent to the radio frequency discrimination RFID card, so that described rfid card responds and upward signal is sent to described reading head arrangement.
2. device according to claim 1 is characterized in that,
Described processor (40) comprising: shunt (15), coupling mechanism (27) and frequency mixer (19);
One end of described shunt (15) output terminal is connected with described coupling mechanism (27), and the other end is connected with described frequency mixer (19), and described coupling mechanism (27) is connected with described frequency mixer (19);
Described shunt (15) is used for described downgoing signal is carried out shunt, obtains the second local oscillation signal and the second frequency variation signal;
Described coupling mechanism (27) is used for the second local oscillation signal coupling after shunt (15) shunt;
Described frequency mixer (19) is used for the second local oscillation signal and the second frequency variation signal after described coupling mechanism (27) coupling are carried out mixing, obtains the downgoing signal of described reduction.
3. device according to claim 2 is characterized in that,
Described processor (40) also comprises: wave filter (28) and power amplifier (18);
Described wave filter (28) is used for the second local oscillation signal after the described mixing and the second frequency variation signal are carried out filtering;
Described power amplifier (18) is used for filtered the second local oscillation signal of described wave filter (28) and the second frequency variation signal are amplified.
4. according to claim 2 or 3 described devices, it is characterized in that,
Also comprise: the ALC control circuit (13) that is used for described downgoing signal is carried out level control;
Wherein, described ALC control circuit (13), the mixing power that specifically whether equals for detection of local oscillation power that the second local oscillation signal is coupled and carry out mixing with the second frequency variation signal, if, lock the pad value of described downgoing signal, if not, described local oscillation power adjusted to equal described mixing power, and lock the pad value of described downgoing signal.
5. a reading head arrangement is characterized in that, comprising:
Combiner (4), antenna (9) and RFID read head (1);
Described combiner (4) is used for obtaining the first local oscillation signal and the first frequency variation signal, and described the first local oscillation signal and the first frequency variation signal is closed the road, obtains closing the downgoing signal behind the road;
Described antenna (9), be used for the downgoing signal that described combiner (4) closes behind the road is sent to expanding unit, so that expanding unit reduces described downgoing signal, and the downgoing signal of reduction sent to the radio frequency discrimination RFID card, so that described rfid card response concurrent is served capable signal;
Described RFID read head (1) is used for receiving the upward signal that rfid card sends.
6. device according to claim 5 is characterized in that,
Also comprise: mixting circuit (2), mixing amplifying circuit (3), local oscillation circuit (8) and local oscillator amplifying circuit (10);
One end of described mixting circuit (2) is connected with described RFID read head (1), and the other end is connected with described mixing amplifying circuit (3), and described mixting circuit (2) is used for generating described the first frequency variation signal;
One end of described local oscillation circuit (8) is connected with described RFID read head (1), and the other end is connected with described local oscillator amplifying circuit (10), and described local oscillation circuit (8) is used for generating described the first local oscillation signal;
Described mixing amplifying circuit (3) is used for amplifying described the first frequency variation signal, and described mixing amplifying circuit (3) is used for amplifying described the first local oscillation signal.
7. according to claim 5 or 6 described devices, it is characterized in that, also comprise: amplifying circuit (6) and starter;
Described amplifying circuit (6) is used for the upward signal that described rfid card sends is amplified;
Described starter is used for the locking local oscillator, and judges according to local oscillator whether described expanding unit is opened, if described expanding unit is opened, then starts described reading head arrangement, if expanding unit is not opened, then starts expanding unit and starts reading head arrangement.
8. a read head expanding system is characterized in that, comprising:
Rfid card, such as each described expanding unit in the claim 1 to 4 with such as each described reading head arrangement in the claim 5 to 7;
Described reading head arrangement obtains downgoing signal, and described downgoing signal is sent to expanding unit, and described downgoing signal is mixed frequency signal and local oscillation signal to be closed rood arrive;
Described expanding unit receives the downgoing signal that reading head arrangement sends, and the described downgoing signal that receives is reduced, and the downgoing signal of reduction is sent to rfid card;
Described rfid card responds the downgoing signal that described expanding unit sends, and upward signal is sent to described reading head arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331129 CN202904590U (en) | 2012-07-10 | 2012-07-10 | Extending device, reading head device and reading head extending system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220331129 CN202904590U (en) | 2012-07-10 | 2012-07-10 | Extending device, reading head device and reading head extending system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202904590U true CN202904590U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220331129 Withdrawn - After Issue CN202904590U (en) | 2012-07-10 | 2012-07-10 | Extending device, reading head device and reading head extending system |
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| Country | Link |
|---|---|
| CN (1) | CN202904590U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842017A (en) * | 2012-07-10 | 2012-12-26 | 深圳市捷顺科技实业股份有限公司 | Method, device and system for expanding reading head |
| CN108988878A (en) * | 2017-05-31 | 2018-12-11 | 莱尔德达本多夫有限责任公司 | Signal Coupling device and method for run signal Coupling device |
-
2012
- 2012-07-10 CN CN 201220331129 patent/CN202904590U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842017A (en) * | 2012-07-10 | 2012-12-26 | 深圳市捷顺科技实业股份有限公司 | Method, device and system for expanding reading head |
| CN102842017B (en) * | 2012-07-10 | 2015-10-28 | 深圳市捷顺科技实业股份有限公司 | A kind of extended method of read head, device and system |
| CN108988878A (en) * | 2017-05-31 | 2018-12-11 | 莱尔德达本多夫有限责任公司 | Signal Coupling device and method for run signal Coupling device |
| CN108988878B (en) * | 2017-05-31 | 2021-08-24 | 莱尔德达本多夫有限责任公司 | Signal coupling device and method for operating a signal coupling device |
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