CN203573337U - RFID three-dimensional detection device - Google Patents
RFID three-dimensional detection device Download PDFInfo
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- CN203573337U CN203573337U CN201320768881.2U CN201320768881U CN203573337U CN 203573337 U CN203573337 U CN 203573337U CN 201320768881 U CN201320768881 U CN 201320768881U CN 203573337 U CN203573337 U CN 203573337U
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Abstract
The utility model relates to the technical field of RFID radio frequency identification, and in particular relates to an RFID three-dimensional detection device which can effectively reduce radio frequency identification misdetection rate and reduces interference between a number of antennas when a multi-antenna identification system works. The device is characterized in that a power distribution circuit, two antenna switching control modules, a first antenna group and a second antenna group are arranged; the input end of the power distribution circuit is connected with the output end of a radio frequency signal transmission circuit; the power distribution circuit is used for distributing an input radio frequency signal into two paths of output according to the ratio of 1:1; two antenna switching control modules are respectively correspondingly connected with two paths of output ends of the power distribution circuit; the first antenna group and the second antenna group are respectively correspondingly connected with two antenna switching control modules; more than two antennas are respectively arranged in the first antenna group and the second antenna group; and a micro control chip is respectively connected with two switching control modules. Compared with the prior art, the device provided by the utility model has the advantages of reasonable structure and stable work, can effectively reduce radio frequency identification misdetection rate, and reduces interference between a number of antennas when the multi-antenna identification system works.
Description
Technical field
The utility model relates to RFID REID field, specifically a kind ofly can effectively reduce radio-frequency (RF) identification loss, the RFID three-dimensional detection device of the interference while alleviating many antenna identification systems work between multiple antennas.
Background technology
As everyone knows, RFID REID is at document management, the fields such as entrance guard management obtain application more and more widely, existing radio frequency identification equipment generally consists of the following components: be arranged near the radio-frequency reading-writing device in region to be detected, be fixed on the radio-frequency (RF) tag on people/thing to be detected, during use, when people wears radio-frequency (RF) tag or article, be fixed with radio-frequency (RF) tag and enter region to be detected, radio-frequency reading-writing device can read the id information in radio-frequency (RF) tag by sending read signal, matching management software, just can complete the management to processes such as personnel's discrepancy/article arrangements.
When using RFID identification equipment to carry out related management, antenna is indispensable parts, it is for exporting radio frequency read signal and receiving the information of being returned by radio-frequency (RF) tag, antenna adopts coil winding to form, third side, to meeting, there is a blind area in the magnetic field that individual antenna forms, when this causes single antenna work, loss is higher, in order to address this problem, researchist proposes many system for antenna supervising, but the problem of disturbing mutually between many antennas of how avoiding simultaneously working and how to improve the utilization factor of radiofrequency signal, avoid because of multiple antennas problems such as causing checkout equipment power consumption rising of simultaneously working urgently to be resolved hurrily.
Summary of the invention
The utility model is for the shortcoming and defect existing in prior art, proposes a kind of rational in infrastructure, working stability, can effectively reduce radio-frequency (RF) identification loss, the RFID three-dimensional detection device of the interference while alleviating many antenna identification systems work between multiple antennas.
The utility model can reach by following measures:
A kind of RFID three-dimensional detection device, be provided with microcontroller chip, radiofrequency signal transtation mission circuit and radiofrequency signal receiving circuit, microcontroller chip is connected with radiofrequency signal receiving circuit with radiofrequency signal transtation mission circuit respectively, it is characterized in that being also provided with that input end is connected with the output terminal of radiofrequency signal transtation mission circuit for the radiofrequency signal of input is assigned as to the power distributing circuit of two-way output by 1:1, two respectively with the antenna switching controls module of the corresponding connection of two-way output terminal of power distributing circuit, respectively with the first antenna sets and second antenna sets of two corresponding connections of antenna switching controls module, in described the first antenna sets and the second antenna sets, be respectively equipped with plural antenna, microcontroller chip is connected with two switching controls modules respectively.
In the utility model, antenna switching controls module is provided with radio-frequency switch circuit and the match circuit being connected with radio-frequency switch circuit, the wherein quantity of antenna in corresponding the first coupled antenna sets or the second antenna sets in antenna switching controls module, be provided with more than two-way with antenna sets in antenna radio-frequency antenna switch and match circuit one to one, for completing the switching controls to more than two antenna.
The utility model is also provided with phase-switching circuit, the control signal input end of phase-switching circuit is connected with microcontroller chip, the input end of phase-switching circuit is connected with power distributing circuit Yi road output terminal, the input end of phase-switching circuit is connected with switching controls module, in phase-switching circuit, be provided with pickup coil, for the phase place of the radiofrequency signal of input being carried out to 180 ° of switchings.
The transtation mission circuit of radiofrequency signal described in the utility model comprises the modulation circuit being connected with microcontroller chip, the power amplification circuit being connected with modulation circuit output terminal, wherein the output terminal of power amplification circuit is connected with power distributing circuit, radiofrequency signal receiving circuit described in the utility model comprises the comparison decision circuit being connected with microcontroller chip, the demodulation circuit of intermediate frequency that output terminal is connected with the input end of relatively judgement, the envelope detection circuit that output terminal is connected with the input end of demodulation circuit of intermediate frequency, wherein the match circuit of the input end of envelope detection circuit in antenna switching controls module is connected with antenna.
In the preferred each antenna switching controls module of the utility model, be provided with three road radio-frequency switch circuits and No. three match circuits, in the first antenna sets and the second antenna sets, be respectively equipped with three aerial coils.
Microcontroller chip described in the utility model can adopt ARM to realize.
When the utility model is used, the first antenna sets and the second antenna sets are arranged on respectively to the both sides in region to be detected, make two groups of antennas emitting radio frequency signal in opposite directions, the overlay area overlaid of two groups of antennas, system powers on, and device completes the loading of master data, radiofrequency signal transtation mission circuit is delivered to power distributing circuit by radiofrequency signal, by power distributing circuit, by 1:1 power ratio, input signal is equally divided into the two-way radiofrequency signal that phase place is identical, and two-way radiofrequency signal is delivered to two radio-frequency switch circuit input ends in antenna switching controls module, by microcontroller chip, to antenna switching controls module, export two-way antenna switch-over control signal, two-way antenna switch-over control signal is controlled respectively each antenna switching controls module Zhong mono-road radio-frequency switch circuit conducting, make to have respectively in the first antenna sets and the second antenna sets antenna in running order and to region to be detected emitting radio frequency signal, the radio-frequency (RF) tag that has respectively an antenna to treat in surveyed area in the first antenna sets and the second antenna sets reads, microcontroller chip timesharing sends switch-over control signal to two antenna switching controls modules, change the on off state of radio-frequency switch circuit in antenna handover module, make the plural antennae polling in the first antenna sets and the second antenna sets, guarantee sometime section in, the first antenna sets and the second antenna sets only have respectively antenna emitting radio frequency signal in opposite directions, and the surveyed area of two antennas is overlapping.
The utility model is preferably respectively equipped with three radio-frequency antennas in the first antenna sets and the second antenna sets, in respective antenna switching controls module, be provided with the match circuit that three road radio-frequency switch circuits and three tunnels and radio-frequency switch circuit connect one to one, the antenna of the first antenna sets and the second antenna sets corresponding and work in pairs one by one simultaneously, microcontroller chip sends control command to two antenna switching controls modules successively, three pairs of antennas in the first antenna sets and the second antenna sets are switched successively, adjacent antenna makes up mutually work blind area, complete the detection to region to be checked, and due to three antenna time-sharing works in the first antenna sets and the second antenna sets, the problem that can effectively avoid many antennas to disturb mutually.
The utility model can also transmit control signal to phase-switching circuit by microcontroller chip, and the radiofrequency signal phase place of the first antenna sets and the transmitting of the second antenna sets internal antenna is changed, and completes the switching of radio frequency sensing range.
The utility model compared with prior art, has the following advantages:
The three-dimensional omnidirectional that 1, can realize label reads: utilize multiple antenna sets to become aerial array, and each antennae polling work, adjacent two antennas make up the other side blind area mutually, thereby realize the three-dimensional omnidirectional of label within the specific limits, read, and effectively reduce loss.
2, the scope of reading tag is large: utilize the aerial array that three antennas form to replace individual antenna, three antennae polling work, each work antenna obtains whole energy of frequency read/write, thereby the scope of effective magnetic field is increased greatly, and the scope of reading tag increases greatly.
3, the utilization factor of read write line is high: multiple antennas use same read write line, and when each antenna work, can obtain whole energy of read write line, greatly improve the utilization factor of read write line, also solved the mutual interference problem existing when multiple antennas connect multiple read write lines and work simultaneously simultaneously.
accompanying drawing explanation:
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is another kind of structural representations of the present utility model.
Reference numeral: microcontroller chip 1, radiofrequency signal transtation mission circuit 2, radiofrequency signal receiving circuit 3, power distributing circuit 4, antenna switching controls module 5, the first antenna sets 6, the second antenna sets 7, antenna 8, radio-frequency switch circuit 9, match circuit 10, phase-switching circuit 11.
embodiment:
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model proposes a kind of RFID three-dimensional detection device, be provided with microcontroller chip 1, radiofrequency signal transtation mission circuit 2 and radiofrequency signal receiving circuit 3, microcontroller chip 1 is connected with radiofrequency signal receiving circuit 3 with radiofrequency signal transtation mission circuit 2 respectively, it is characterized in that being also provided with that input end is connected with the output terminal of radiofrequency signal transtation mission circuit 2 for the radiofrequency signal of input is assigned as to the power distributing circuit 4 of two-way output by 1:1, two respectively with the antenna switching controls module 5 of the corresponding connection of two-way output terminal of power distributing circuit 4, respectively with the first antenna sets 6 and second antenna sets 7 of two corresponding connections of antenna switching controls module 5, in described the first antenna sets 6 and the second antenna sets 7, be respectively equipped with plural antenna 8, microcontroller chip is connected with two switching controls modules respectively.
In the utility model, antenna switching controls module 5 is provided with radio-frequency switch circuit 9 and the match circuit 10 being connected with radio-frequency switch circuit 9, the wherein quantity of antenna 8 in corresponding the first coupled antenna sets 6 or the second antenna sets 7 in antenna switching controls module 5, be provided with more than two-way with antenna sets in antenna 8 radio-frequency antenna on-off circuit 9 and match circuit 10 one to one, for completing the switching controls to more than two antenna.
The utility model is also provided with phase-switching circuit 11, the control signal input end of phase-switching circuit 11 is connected with microcontroller chip 1, the input end of phase-switching circuit 11 is connected with power distributing circuit 4 Yi road output terminals, the input end of phase-switching circuit 11 is connected with switching controls module 5, in phase-switching circuit 11, be provided with pickup coil, for the phase place of the radiofrequency signal of input being carried out to 180 ° of switchings.
The transtation mission circuit of radiofrequency signal described in the utility model 2 comprises the modulation circuit being connected with microcontroller chip 1, the power amplification circuit being connected with modulation circuit output terminal, wherein the output terminal of power amplification circuit is connected with power distributing circuit, radiofrequency signal receiving circuit 3 described in the utility model comprises the comparison decision circuit being connected with microcontroller chip, the demodulation circuit of intermediate frequency that output terminal is connected with the input end of relatively judgement, the envelope detection circuit that output terminal is connected with the input end of demodulation circuit of intermediate frequency, wherein the match circuit 10 of the input end of envelope detection circuit in antenna switching controls module 5 is connected with antenna 8.
In the preferred each antenna switching controls module 5 of the utility model, be provided with three road radio-frequency switch circuits 9 and No. three match circuit 10, the first antenna sets and be provided with three aerial coils with corresponding respectively in the second antenna sets.
Microcontroller chip described in the utility model can adopt ARM to realize.
The utility model compared with prior art, has the following advantages:
The three-dimensional omnidirectional that 1, can realize label reads: utilize multiple antenna sets to become aerial array, and each antennae polling work, adjacent two antennas make up the other side blind area mutually, thereby realize the three-dimensional omnidirectional of label within the specific limits, read, and effectively reduce loss.
2, the scope of reading tag is large: utilize the aerial array that three antennas form to replace individual antenna, three antennae polling work, each work antenna obtains whole energy of frequency read/write, thereby the scope of effective magnetic field is increased greatly, and the scope of reading tag increases greatly.
3, the utilization factor of read write line is high: multiple antennas use same read write line, and when each antenna work, can obtain whole energy of read write line, greatly improve the utilization factor of read write line, also solved the mutual interference problem existing when multiple antennas connect multiple read write lines and work simultaneously simultaneously.
Claims (5)
1. a RFID three-dimensional detection device, be provided with microcontroller chip, radiofrequency signal transtation mission circuit and radiofrequency signal receiving circuit, microcontroller chip is connected with radiofrequency signal receiving circuit with radiofrequency signal transtation mission circuit respectively, it is characterized in that being also provided with that input end is connected with the output terminal of radiofrequency signal transtation mission circuit for the radiofrequency signal of input is assigned as to the power distributing circuit of two-way output by 1:1, two respectively with the antenna switching controls module of the corresponding connection of two-way output terminal of power distributing circuit, respectively with the first antenna sets and second antenna sets of two corresponding connections of antenna switching controls module, in described the first antenna sets and the second antenna sets, be respectively equipped with plural antenna, microcontroller chip is connected with two switching controls modules respectively.
2. RFID three-dimensional detection device according to claim 1, it is characterized in that antenna switching controls module is provided with radio-frequency switch circuit and the match circuit being connected with radio-frequency switch circuit, the wherein quantity of antenna in corresponding the first coupled antenna sets or the second antenna sets in antenna switching controls module, be provided with more than two-way with antenna sets in antenna radio-frequency antenna switch and match circuit one to one.
3. RFID three-dimensional detection device according to claim 1, it is characterized in that being provided with phase-switching circuit, the control signal input end of phase-switching circuit is connected with microcontroller chip, the input end of phase-switching circuit is connected with power distributing circuit Yi road output terminal, the input end of phase-switching circuit is connected with switching controls module, is provided with the pickup coil for the phase place of the radiofrequency signal of input being carried out to 180 ° of switchings in phase-switching circuit.
4. RFID three-dimensional detection device according to claim 1, it is characterized in that described radiofrequency signal transtation mission circuit comprises the modulation circuit being connected with microcontroller chip, the power amplification circuit being connected with modulation circuit output terminal, wherein the output terminal of power amplification circuit is connected with power distributing circuit, described radiofrequency signal receiving circuit comprises the comparison decision circuit being connected with microcontroller chip, the demodulation circuit of intermediate frequency that output terminal is connected with the input end of relatively judgement, the envelope detection circuit that output terminal is connected with the input end of demodulation circuit of intermediate frequency, wherein the match circuit of the input end of envelope detection circuit in antenna switching controls module is connected with antenna.
5. RFID three-dimensional detection device according to claim 1, is characterized in that being provided with in each antenna switching controls module three road radio-frequency switch circuits and No. three match circuits, and the first antenna sets is provided with three aerial coils with corresponding respectively in the second antenna sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320768881.2U CN203573337U (en) | 2013-11-29 | 2013-11-29 | RFID three-dimensional detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320768881.2U CN203573337U (en) | 2013-11-29 | 2013-11-29 | RFID three-dimensional detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573337U true CN203573337U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320768881.2U Expired - Lifetime CN203573337U (en) | 2013-11-29 | 2013-11-29 | RFID three-dimensional detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109460688A (en) * | 2018-09-27 | 2019-03-12 | 威海北洋光电信息技术股份公司 | Three-dimensional settlement channel device and its application method based on isosceles triangle antenna |
-
2013
- 2013-11-29 CN CN201320768881.2U patent/CN203573337U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109460688A (en) * | 2018-09-27 | 2019-03-12 | 威海北洋光电信息技术股份公司 | Three-dimensional settlement channel device and its application method based on isosceles triangle antenna |
| CN109460688B (en) * | 2018-09-27 | 2021-11-09 | 威海北洋光电信息技术股份公司 | Three-dimensional settlement channel device based on delta-shaped antenna and using method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
|
| CX01 | Expiry of patent term |