CN203616772U - Double-rectangular-frame three-dimensional channel device - Google Patents
Double-rectangular-frame three-dimensional channel device Download PDFInfo
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- CN203616772U CN203616772U CN201320879434.4U CN201320879434U CN203616772U CN 203616772 U CN203616772 U CN 203616772U CN 201320879434 U CN201320879434 U CN 201320879434U CN 203616772 U CN203616772 U CN 203616772U
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Abstract
The utility model relates to the radio frequency identification technology field, and concretely provides a double-rectangular-frame three-dimensional channel device. The channel device is characterized in that, a radio frequency signal output end of a radio frequency reader-writer is connected with a power divider; a control signal output end of the radio frequency reader-writer is connected with control ends of two antenna switching modules respectively; two radio frequency signal output ends of the power divider are connected with radio frequency signal input ends of the antenna switching modules respectively; the output end of each antenna switching module is connected with two adapters respectively; each adapter is connected with a radio frequency antenna. Compared with the prior art, the channel device has advantages of three dimensional reading of labels, low misreading rate, no coupling among the antennae, simple wiring and the like.
Description
Technical field
The utility model relates to radio-frequency (RF) identification (RFID, Radio Frequency Identification) technical field, specifically one can realize that label three-dimensional reads, skip rate is low, between antenna without coupling, simple double square frame three-dimensional channel device connects up.
Background technology
In existing REID field, radio-frequency recognition system generally comprises radio-frequency antenna, for controlling the module for reading and writing of emission of radio frequency signals and reception, and be fixed on the radio-frequency (RF) tag on article to be identified, radio-frequency antenna output radiofrequency signal when use, radio-frequency (RF) tag is read, the information of carrying in radio-frequency (RF) tag is the signal receiving circuit in radio-frequency antenna feeds back to module for reading and writing again, after the information receiving is processed, can complete to radio-frequency (RF) tag with and the ID identification of represented object.In this system, radio-frequency antenna is the important component part of whole radio-frequency recognition system, and it completes transmitting and receiving of magnetic field in radio-frequency recognition system.In the time that REID is applied to three-dimensional channel device, radio-frequency antenna need to be made to the form of antenna frame, multiple frame antenna composition aerial arrays, aerial array completes the three-dimensional of label is read.
Existing three-dimensional channel device adopts the form of the overlapping complementation of two or three antenna frames conventionally, the poll work successively of each antenna, and adjacent two frame antenna can make up the other side blind area mutually, thus the three-dimensional that has realized label reads.But there is following problem in existing three-dimensional channel device: first, antenna switching circuit and adaptation circuit adopt integral type design, all on matching disc, and the form that signal transmission adopts alternating current-direct current to separate, be that radiofrequency signal and control signal are respectively by radio frequency wire size line and control signal wire transmission, adaptation is comparatively complicated, and matching disc connection wire is more, is unfavorable for producing and safeguarding; The second, all antenna-matching circuits all, in a circuit board, cause antenna to influence each other, and coupled problem is serious, and reading performance declines, and is unfavorable for stablizing reading tag; The 3rd, adopt the three-dimensional channel of three antenna frame forms, compared with adopting the three-dimensional channel of two antenna frame forms, due to three antennae polling work, the antennae polling time is certain, thus the time decreased that each antenna reads, in the time that multiple labels pass through lane device simultaneously, because the time is shorter, may there is skip phenomenon.
Summary of the invention
The shortcoming and defect that the utility model exists for prior art, propose that one can realize that label three-dimensional reads, skip rate is low, between antenna without coupling, simple double square frame three-dimensional channel device connects up.
The utility model can reach by following measures:
A kind of double square frame three-dimensional channel device, be provided with frequency read/write, power divider, antenna handover module, adaptation and radio-frequency antenna, the radiofrequency signal output terminal that it is characterized in that frequency read/write is connected with power divider, the control signal output terminal of frequency read/write is connected with the control end of two antenna handover modules respectively, the two-way radiofrequency signal output terminal of power divider is connected with the radio-frequency (RF) signal input end of antenna handover module respectively, the output terminal of each antenna handover module is connected with two adaptations respectively, each adaptation is all connected with a radio-frequency antenna.
Two radio-frequency antennas that are connected with same antenna handover module in the utility model are fixed in same channel bracket, two equal coilings of radio-frequency antenna coil are rectangle, and fixing up and down, two radio-frequency antenna coil partly overlap, the area of lap accounts for the 1/5-1/3 of each radio-frequency antenna coil total area, be preferably 1/4, four radio-frequency antennas are separately fixed in two channel bracket, can monitor the region between two channel bracket.
The radio-frequency transmissions circuit that is provided with microcontroller chip described in the utility model in frequency read/write, be connected with microcontroller chip, the radio-frequency (RF) receiving circuit being connected with microcontroller chip and the control switching circuit being connected with microcontroller chip;
The phase-switching circuit that is provided with power distributing circuit in described power divider and is connected with power distributing circuit output terminal, wherein power distributing circuit is the power distributing circuit that the radiofrequency signal of input is divided into two-way by 1:1 power ratio, the radio-frequency (RF) signal input end of power distributing circuit is provided with main coil, radiofrequency signal output terminal is provided with two secondary coils that the number of turn is identical for being coupled with main coil, and phase-switching circuit is used for 180 ° of the phase changes of the radiofrequency signal of input;
In described antenna handover module, be provided with the alternating current-direct current output circuit of controlling driving circuit and being connected with control driving circuit;
The impedance matching circuit that is provided with alternating current-direct current treatment circuit in described adaptation, be connected with alternating current-direct current treatment circuit output terminal, the high-frequency switch circuit being connected with the output terminal of impedance matching circuit;
Wherein the output terminal of the radio-frequency transmissions circuit of frequency read/write is connected with the input end of the power distributing circuit in power divider, the output terminal of control switching circuit is connected with phase-switching circuit, antenna handover module respectively, and radio-frequency (RF) receiving circuit is connected with power divider radio frequency signal feedback end.
The utility model compared with prior art, have the following advantages: (1) is realized label three-dimensional and read, skip rate is low: two frame antenna poll work, mutually make up the other side blind area, thereby the three-dimensional that has realized label reads, compare three antenna frame forms, because the poll time is certain, so the time that each antenna reads increases by 1/3rd, in the time that multiple labels pass through lane device simultaneously, antenna has time enough reading tag, thereby effectively reduce skip rate, has greatly improved device and read the performance of many labels; (2) nothing coupling between antenna, reading performance is good: the match circuit of each antenna is design separately all, and a corresponding matching disc of antenna, has solved interactional problem between two antennas, and between antenna, without being coupled, reading performance is good, can stablize reading tag; (3) antijamming capability is strong: antenna switching circuit and adaptation circuit adopt split mode to design, and this split-type design contributes to suppress radiofrequency signal harmonic wave and produces, and has reduced the interference of signal to emissive porwer, has improved the antijamming capability of device; (4) wiring is simple, be convenient to produce and safeguard: antenna switching circuit and adaptation circuit adopt split mode to design, and the form that signal transmission adopts alternating current-direct current to merge, control signal is superimposed to radiofrequency signal, signal after stack transmits adaptation circuit by rf signal line, antenna-matching circuit is simple, and matching disc connection wire is few, is convenient to produce and safeguard; (5) production cost is low: adopt two antenna frame forms to realize label three-dimensional and read, compare three antenna frame forms, antenna number reduces, corresponding match circuit also reduces one, and antenna-matching circuit adopts the form of alternating current-direct current merging, matching disc connection wire quantity reduces, and reduces individual equipment production work amount, is conducive to reduce cost of products.
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: frequency read/write 1, power divider 2, antenna handover module 3, adaptation 4, radio-frequency antenna 5, radio-frequency antenna 6, radio frequency radio-frequency antenna 7, radio-frequency antenna 8, microcontroller chip 9, radio-frequency transmissions circuit 10, control switching circuit 11, radio-frequency (RF) receiving circuit 12, power distributing circuit 13, phase-switching circuit 14, control driving circuit 15, alternating current-direct current output circuit 16, alternating current-direct current treatment circuit 17, match circuit 18, high-frequency switch circuit 19.
embodiment:
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, a kind of double square frame three-dimensional channel device the utility model proposes, comprise: frequency read/write 1, power divider 2, antenna handover module 3, adaptation 4, aerial array, described aerial array adopts the form of the overlapping complementation of two squaerial frames, two antennae polling work in every array, mutually make up the other side blind area, two aerial arrays are worked simultaneously, form magnetic field passages relatively uniformly two in the middle of aerial arrays, thereby the three-dimensional that can realize label reads.
Described frequency read/write 1: totally three output terminals, one of them output terminal is connected with antenna handover module by control signal wire, two other output terminal is connected with power divider with control wire size line by rf signal line respectively, for generation of radiofrequency signal, Phase-switching signal and antenna switching signal, wherein antenna switch-over control signal is sent to antenna handover module, and radiofrequency signal and Phase-switching signal are sent to power divider.Described frequency read/write 1 comprises microcontroller chip 9, radio-frequency transmissions circuit 10, control switching circuit 11 and radio-frequency (RF) receiving circuit 12, described microcontroller chip 9 is centralized control units of whole frequency read/write, both control transmitting and receiving of frequency read/write, controlled again the switching between modules; Described radio-frequency transmissions circuit 10, by select core transistor build circuit, realize the power amplification of modulation signal, and by rf signal line to next stage transmission; Described control switching circuit 11, receives the instruction of microcontroller chip, completes Phase-switching and antenna handover module complete antenna and switch by control signal wire power ratio control divider; Described radio-frequency (RF) receiving circuit 12, the label information that received RF antenna returns, and decoding, and these information are passed to microcontroller chip process.
Described power divider 2: input end is connected with frequency read/write with control signal wire by rf signal line respectively, output terminal is connected with two antenna handover modules by rf signal line, receive radiofrequency signal and Phase-switching signal from frequency read/write, the power averaging of realizing radiofrequency signal distributes and Phase-switching, and outwards exports two-way radiofrequency signal.Described power divider 2 comprises power distributing circuit 13 and phase-switching circuit 14, described power distributing circuit 13, by build capacitance-resistance value circuit realize radiofrequency signal by power ratio 1:1 mean allocation to two-way; Described phase-switching circuit 14, is provided with HF switch, according to Phase-switching signal, a wherein road radiofrequency signal of merit parallel circuit output terminal is realized to 0 ° or 180 ° of Phase-switchings.
Described antenna handover module 3: have two input ends, two output terminals, an input end is connected with frequency read/write by control signal wire, another input end is connected with power splitter by rf signal line, two output terminals are connected with two adaptations by two radio frequency wire size lines respectively, receive from the control signal of frequency read/write with from the radiofrequency signal of power splitter, the switching controls of complete twin aerial, and realize the merging exchanging with direct current.Described antenna handover module 3 comprises controls driving circuit 15 and alternating current-direct current output circuit 16, and described control driving circuit 15, is provided with HF switch, according to the antenna switching signal from frequency read/write, drives different HF switch, realizes the switching between antenna; Described alternating current-direct current output electricity, 16, realize the merging exchanging with direct current, control signal is superimposed to radiofrequency signal, the signal after stack is sent to adaptation by radio frequency line.
Described adaptation 4: input end is connected with antenna handover module by rf signal line, the control of complete twin aerial and coupling.Described adaptation comprises alternating current-direct current treatment circuit 17, match circuit 18 and high-frequency switch circuit 19, described alternating current-direct current treatment circuit 17, the control signal of transmitting according to rf signal line, opens the HF switch that antenna is corresponding, makes radiofrequency signal pass through antenna and outwards launches; Described match circuit 18 carries out impedance matching and resonant transformation to antenna, the radiofrequency signal arrival antenna as much as possible sending, and go out by aerial radiation; Described high-frequency switch circuit 19 is provided with HF switch, HF switch disconnects radio frequency signal transmission line and adaptation in the time that antenna is not worked, and avoids the distribution parameter existing in radio frequency signal transmission line to impact other aerial coils except connected aerial coil.
The utility model comprises two aerial arrays, described each aerial array adopts the form of the overlapping complementation of two squaerial frames, first day linear array comprises radio-frequency antenna 5 and radio-frequency antenna 6, the second aerial array comprises radio frequency radio-frequency antenna 7 and radio-frequency antenna 8, and the adaptation circuit of each antenna is design separately all, a corresponding adaptation of antenna, solve interactional problem between two antennas, between antenna, without coupling, reading performance is good, can stablize reading tag.
As depicted in figs. 1 and 2, antenna switching circuit and adaptation circuit adopt split mode to design, and this split-type design contributes to suppress radiofrequency signal harmonic wave and produces, and reduce the interference of signal to emissive porwer, improve the antijamming capability of device.Described antenna switching circuit, can realize in a radio frequency line, and AC and DC passes through together, and realizes and separating at adaptation end, and major advantage is that wiring is simple, reduces wire rod kind, reduces individual equipment production work amount, is conducive to reduce cost of products.
Radiofrequency signal inputs to antenna handover module, through controlling driving circuit, radiofrequency signal timesharing is switched to different radio frequency delivery outlets, radiofrequency signal is in the time of alternating current-direct current output circuit simultaneously, alternating current-direct current output circuit is realized the merging exchanging with direct current, and control signal is superimposed to radiofrequency signal, and the signal after stack is sent to the input end of adaptation through rf signal line, through the alternating current-direct current treatment circuit of adaptation, by the separately rear each self-forming of AC and DC loop.
The control signal superposeing in radiofrequency signal is for the HF switch of driven antenna match circuit, guarantee that by this HF switch aerial coil is not in the time working, radio frequency signal transmission line and aerial coil are off-state, eliminate the impact that the distribution parameter that exists in this radio frequency signal transmission line causes aerial coil, and then assurance antenna serviceability, eliminate the phase mutual interference between aerial coil, the radiofrequency signal obtaining after direct current treatment circuit, through match circuit, by the frequency resonance of respective antenna to 13.56M, output impedance is converted into 50 Ω, then radiofrequency signal is radiated in the air.
Claims (7)
1. a double square frame three-dimensional channel device, be provided with frequency read/write, power divider, antenna handover module, adaptation and radio-frequency antenna, the radiofrequency signal output terminal that it is characterized in that frequency read/write is connected with power divider, the control signal output terminal of frequency read/write is connected with the control end of two antenna handover modules respectively, the two-way radiofrequency signal output terminal of power divider is connected with the radio-frequency (RF) signal input end of antenna handover module respectively, the output terminal of each antenna handover module is connected with two adaptations respectively, each adaptation is all connected with a radio-frequency antenna.
2. a kind of double square frame three-dimensional channel device according to claim 1, it is characterized in that two radio-frequency antennas that are connected with same antenna handover module are fixed in same channel bracket, two equal coilings of radio-frequency antenna coil are rectangle, and fixing up and down, two radio-frequency antenna coil partly overlap, and the area of lap accounts for the 1/5-1/3 of each radio-frequency antenna coil total area.
3. a kind of double square frame three-dimensional channel device according to claim 2, is characterized in that the control switching circuit that is provided with microcontroller chip, the radio-frequency transmissions circuit being connected with microcontroller chip, the radio-frequency (RF) receiving circuit being connected with microcontroller chip and is connected with microcontroller chip in described frequency read/write.
4. a kind of double square frame three-dimensional channel device according to claim 3, it is characterized in that the phase-switching circuit that is provided with power distributing circuit and is connected with power distributing circuit output terminal in described power divider, wherein power distributing circuit is the power distributing circuit that the radiofrequency signal of input is divided into two-way by 1:1 power ratio, the radio-frequency (RF) signal input end of power distributing circuit is provided with main coil, radiofrequency signal output terminal is provided with two secondary coils that the number of turn is identical for being coupled with main coil, phase-switching circuit is used for 180 ° of the phase changes of the radiofrequency signal of input.
5. a kind of double square frame three-dimensional channel device according to claim 4, is characterized in that the alternating current-direct current output circuit that is provided with control driving circuit and is connected with control driving circuit in described antenna handover module.
6. a kind of double square frame three-dimensional channel device according to claim 5, the high-frequency switch circuit that it is characterized in that being provided with in described adaptation alternating current-direct current treatment circuit, the impedance matching circuit being connected with alternating current-direct current treatment circuit output terminal, is connected with the output terminal of impedance matching circuit.
7. a kind of double square frame three-dimensional channel device according to claim 6, the output terminal that it is characterized in that the radio-frequency transmissions circuit of frequency read/write is connected with the input end of the power distributing circuit in power divider, the output terminal of control switching circuit is connected with phase-switching circuit, antenna handover module respectively, and radio-frequency (RF) receiving circuit is connected with power divider radio frequency signal feedback end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879434.4U CN203616772U (en) | 2013-12-30 | 2013-12-30 | Double-rectangular-frame three-dimensional channel device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320879434.4U CN203616772U (en) | 2013-12-30 | 2013-12-30 | Double-rectangular-frame three-dimensional channel device |
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| CN203616772U true CN203616772U (en) | 2014-05-28 |
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| CN201320879434.4U Expired - Lifetime CN203616772U (en) | 2013-12-30 | 2013-12-30 | Double-rectangular-frame three-dimensional channel device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699919A (en) * | 2013-12-30 | 2014-04-02 | 威海北洋电气集团股份有限公司 | Double-rectangular frame three-dimensional channel device |
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- 2013-12-30 CN CN201320879434.4U patent/CN203616772U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699919A (en) * | 2013-12-30 | 2014-04-02 | 威海北洋电气集团股份有限公司 | Double-rectangular frame three-dimensional channel device |
| CN103699919B (en) * | 2013-12-30 | 2017-10-24 | 威海北洋电气集团股份有限公司 | A kind of Double-rectangular frame three-dimensional channel device |
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Granted publication date: 20140528 |
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