CN104331720A - Multichannel ultrahigh radio frequency identification system - Google Patents
Multichannel ultrahigh radio frequency identification system Download PDFInfo
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- CN104331720A CN104331720A CN201410573765.4A CN201410573765A CN104331720A CN 104331720 A CN104331720 A CN 104331720A CN 201410573765 A CN201410573765 A CN 201410573765A CN 104331720 A CN104331720 A CN 104331720A
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Abstract
The invention discloses a multichannel ultrahigh radio frequency identification system which comprises an RFID (radio frequency identification) reader-writer, a radio frequency switch control board and a radio frequency coaxial cable. A low-pass filter, a band-pass filter and a high-pass filter are respectively added at power ends, control ends and radio frequency signal ends of the RFID reader-writer and the radio frequency switch control board, so that power, control signals and radio frequency signals share the radio frequency coaxial cable for transmission and are not easily mutually interfered, and the system effectively solves the technical problem that an RFID reader-writer and a radio frequency switch control board are complicatedly wired and easily generate faults.
Description
Technical field
The present invention relates to less radio-frequency field, refer in particular to one and be applicable to multichannel ultra-high frequency RFID radio-frequency recognition system.
Background technology
As shown in Figure 1, traditional hyperchannel ultrahigh-frequency radio-frequency identification system is generally made up of rfid interrogator 1' and radio-frequency (RF) switch control panel 2'; Described read write line 1' comprises the first supply module 11', control signal sending module 12' and radiofrequency signal module 13'; Described radio-frequency (RF) switch control panel 2' comprises the second supply module 21', relay amplifier 24', radio-frequency switch module 22' and some antenna 23'.First supply module 11' is responsible for read write line 1' and powers, and is electrically connected with the second supply module 21' by a power cable 3'; Control signal sending module 12' by N bars cable 4' be connected with radio-frequency switch module 22' (suppose that this radio-frequency recognition system has X antenna channels, then need N bars cable, wherein during X>=2, log
2x≤N < log
2x+1; N and X is positive integer); Radiofrequency signal module 13' is connected with relay amplifier 24' by a radio frequency coaxial-cable 5', and described relay amplifier 24' can amplify reception or transmission radiofrequency signal; The second described supply module 21' is responsible for radio frequency switch control rule plate 2' and powers; Described radio-frequency switch module 22' one end is connected with relay amplifier 24', and one end is connected with some antennas, the steering order sent by reception control signal sending module 12', the antenna 23' that gating is corresponding, receives/send radiofrequency signal.
Specifically, when supposing that hyperchannel ultrahigh-frequency radio-frequency identification system is connected with 4 strip antenna, namely during X=4, log
24≤N < log
24+1, then N=2, therefore this radio-frequency recognition system inside adds up to for the cable connecting rfid interrogator 1' and radio-frequency (RF) switch control panel 2': 2 bars cables, 1 power cable, article 1, radio frequency coaxial-cable, so just easily cause system to install loaded down with trivial details, how lengthy and jumbled line is, and cable cost is high, also may there is the situation of cable wrong interface simultaneously, thus cause the failure rate of product high, particularly when read write line 1' and radio-frequency (RF) switch control panel 2' is distant, the problems referred to above just more easily occur.
Summary of the invention
The invention reside in and provide a kind of novel hyperchannel ultra-high frequency RFID radio-frequency recognition system, this radio-frequency recognition system can realize the connection of multi-signal between read write line and radio-frequency (RF) switch control panel by single cable, and can not produce interference each other.
For achieving the above object, technical scheme of the present invention is:
Adopt such scheme:
A kind of hyperchannel ultrahigh-frequency radio-frequency identification system, it comprises rfid interrogator, radio-frequency (RF) switch control panel and a radio frequency coaxial-cable;
Aforesaid rfid interrogator comprises the first supply module, the first power-supply filter, control signal sending module, the first bandpass filter, radiofrequency signal module and the first Hi-pass filter;
Aforesaid radio-frequency (RF) switch control panel comprises second source wave filter, the second supply module, the second bandpass filter, controller module, the second Hi-pass filter, radio-frequency switch module and some antenna elements;
Wherein the first supply module is divided into the output of two-way power supply, one tunnel powers to rfid interrogator, another road first power-supply filter is connected with radio frequency coaxial-cable, through second source filter to output current to the second supply module, be responsible for powering to radio-frequency (RF) switch control panel by the second supply module;
Control signal sending module through the first bandpass filter by radio frequency coaxial-cable to controller module transmission of control signals, this control signal is separated out through the second bandpass filter and is transferred to controller module, final by controller module to radio-frequency switch module sending controling instruction, trigger radio-frequency switch module gating respective antenna unit;
Radiofrequency signal module through the first Hi-pass filter by antenna element from radio frequency coaxial-cable to radio-frequency switch module gating sending/receiving radiofrequency signal, this radiofrequency signal is separated out through the second Hi-pass filter and is transferred to radio-frequency switch module, then by the antenna element sending/receiving radiofrequency signal of radio-frequency switch module gating.
Further, the first described supply module, the second supply module are direct supply; The first described power-supply filter, second source wave filter are DC wave filter.
Further, described DC wave filter is the low-pass filter circuit be made up of inductance and electric capacity.
Further, the first described bandpass filter, the second bandpass filter only Permissible bandwidth scope are that the ripple of the special frequency channel of 300KHz ~ 500KHz passes through;
Further, the ripple of the first described Hi-pass filter, the second Hi-pass filter only special frequency channel of Permissible bandwidth >=800MHz passes through.
Further, described controller module is made up of field programmable gate array (FPGA), this FPGA device comprises decoder module, signal control module, this decoder module is for identifying that read write line sends the steering order of gating respective antenna unit, the control signal of the low and high level then sent to radio-frequency switch module by signal control module, triggers radio-frequency switch module gating respective antenna unit.
Further, at the second Hi-pass filter and relay amplifier of connecting between radio-frequency switch module, for realizing, the radiofrequency signal sent and receive is amplified.
Adopt technique scheme, by increasing low-pass filter, bandpass filter and Hi-pass filter respectively at the power end of rfid interrogator end and radio-frequency (RF) switch control panel end, control end and radiofrequency signal end, realize the shared radio frequency coaxial-cable of power supply, control signal and radiofrequency signal to transmit, and three's signal not easily interferes with each other, efficiently solve line between rfid interrogator and radio-frequency (RF) switch control panel complicated, easily produce the technical matters of fault.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 commonly uses RFID radio-frequency recognition system annexation figure;
Fig. 2 is RFID radio-frequency recognition system annexation figure of the present invention;
Fig. 3 is that the present invention increases the annexation figure of relay amplifier at RFID radio-frequency recognition system.
Embodiment
As shown in Figure 2, the invention discloses a kind of novel hyperchannel ultra-high frequency RFID radio-frequency recognition system, it comprises rfid interrogator 1, radio-frequency (RF) switch control panel 2 and one for transmitting the radio frequency coaxial-cable 3 of power supply, control and radiofrequency signal.
This rfid interrogator 1 comprises the first supply module 11, first power-supply filter 12, control signal sending module 13, first bandpass filter 14, radiofrequency signal module 15 and the first Hi-pass filter 16.
This radio-frequency (RF) switch control panel 2 comprises second source wave filter 21, second supply module 22, second bandpass filter 23, controller module 24, second Hi-pass filter 25, radio-frequency switch module 26 and some antenna elements 27.
This first supply module 11 is preferably direct supply, it is divided into two-way power supply and exports, one tunnel powers to rfid interrogator 1, another road first DC wave filter 12 is connected with radio frequency coaxial-cable 3, output current to the second supply module 22 through the second DC wave filter 21, be responsible for powering to radio-frequency (RF) switch control panel 2 by the second supply module 22, this first DC wave filter 12 and the second DC wave filter 21 are the low-pass filter be made up of inductance and electric capacity, this low-pass filter allows the direct current of low frequency to pass through, the undesired signal higher to frequency then has larger inhibiting effect, therefore the first DC wave filter 12 is set at rfid interrogator 1, can effectively prevent control signal and radiofrequency signal from moving back to the first supply module end 12, and the second DC wave filter 21 is set in radio-frequency (RF) switch control panel 2, by effective, the control signal and radiofrequency signal of passing through radio frequency coaxial-cable 3 can be filtered, ensure to export the electric current of the second supply module 22.
Control signal sending module 13 passes through radio frequency coaxial-cable 3 to controller module 24 transmission of control signals through the first bandpass filter 14, this control signal is separated out through the second bandpass filter 23 and is transferred to controller module 24, this controller module 24 is made up of field programmable gate array (FPGA), this FPGA device comprises decoder module, signal control module (not shown), this decoder module is for identifying that read write line 1 sends the steering order of gating respective antenna unit 27, the control signal of the low and high level then sent to radio-frequency switch module 26 by signal control module, trigger radio-frequency switch module 26 gating respective antenna unit 27, it should be noted that, first bandpass filter 14, second bandpass filter 23 only Permissible bandwidth scope is that the ripple of the special frequency channel of 300KHz ~ 500KHz passes through.
Radiofrequency signal module 15 send/receive radiofrequency signal by radio frequency coaxial-cable 3 to the antenna element 27 of radio-frequency switch module 26 gating through the first Hi-pass filter 16, this radiofrequency signal is separated out through the second Hi-pass filter 25 and is transferred to radio-frequency switch module 26, then send/receive radiofrequency signal by the antenna element 27 of radio-frequency switch module 26 gating, simultaneously the ripple of the first Hi-pass filter 16, second Hi-pass filter 25 only special frequency channel of Permissible bandwidth >=800MHz passes through.
Pass through technique scheme, because low-pass filter only allows the signal of low frequency (being generally no more than the frequency of 100Hz) to pass through, and galvanic frequency is zero in theory, bandpass filter only Permissible bandwidth scope is that the ripple of the special frequency channel of 300KHz ~ 500KHz passes through, and the ripple of the Hi-pass filter 25 only special frequency channel of Permissible bandwidth >=800MHz passes through, therefore between rfid interrogator 1 and radio-frequency (RF) switch control panel 2, share a radio frequency coaxial-cable 3 carry out power supply, control signal and radio signal transmission, three's signal can not interfere with each other, efficiently solve line between rfid interrogator and radio-frequency (RF) switch control panel complicated, the technical matters of easy generation fault.
Simultaneously in order to increase the intensity that radiofrequency signal sends and receives, as Fig. 3, can at the second Hi-pass filter 25 and relay amplifier 28 of connecting between radio-frequency switch module 26, for realize that the radiofrequency signal that sends the radiofrequency signal module 15 of rfid interrogator 1 and receiving antenna unit 27 feed back to the amplification of radiofrequency signal, increase the recognition accuracy of this radio-frequency recognition system.
Above-described embodiment and diagram non-limiting invention product form and style, any person of an ordinary skill in the technical field, to its suitable change done and modification, all should be considered as not departing from patent category of the present invention.
Claims (7)
1. a hyperchannel ultrahigh-frequency radio-frequency identification system, is characterized in that: it comprises rfid interrogator, radio-frequency (RF) switch control panel and a radio frequency coaxial-cable;
Aforesaid rfid interrogator comprises the first supply module, the first power-supply filter, control signal sending module, the first bandpass filter, radiofrequency signal module and the first Hi-pass filter;
Aforesaid radio-frequency (RF) switch control panel comprises second source wave filter, the second supply module, the second bandpass filter, controller module, the second Hi-pass filter, radio-frequency switch module and some antenna elements;
Wherein the first supply module is divided into the output of two-way power supply, one tunnel powers to rfid interrogator, another road first power-supply filter is connected with radio frequency coaxial-cable, through second source filter to output current to the second supply module, be responsible for powering to radio-frequency (RF) switch control panel by the second supply module;
Control signal sending module through the first bandpass filter by radio frequency coaxial-cable to controller module transmission of control signals, this control signal is separated out through the second bandpass filter and is transferred to controller module, final by controller module to radio-frequency switch module sending controling instruction, trigger radio-frequency switch module gating respective antenna unit;
Radiofrequency signal module through the first Hi-pass filter by antenna element from radio frequency coaxial-cable to radio-frequency switch module gating sending/receiving radiofrequency signal, this radiofrequency signal is separated out through the second Hi-pass filter and is transferred to radio-frequency switch module, then by the antenna element sending/receiving radiofrequency signal of radio-frequency switch module gating.
2. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 1, is characterized in that: the first described supply module, the second supply module are direct supply; The first described power-supply filter, second source wave filter are DC wave filter.
3. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 2, is characterized in that: described DC wave filter is the low-pass filter circuit be made up of inductance and electric capacity.
4. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 1, is characterized in that: the first described bandpass filter, the second bandpass filter only Permissible bandwidth scope are that the ripple of the special frequency channel of 300KHz ~ 500KHz passes through.
5. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 1, is characterized in that: the ripple of the first described Hi-pass filter, the second Hi-pass filter only special frequency channel of Permissible bandwidth >=800MHz passes through.
6. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 1, it is characterized in that: described controller module is made up of field programmable gate array (FPGA), this FPGA device comprises decoder module, signal control module, this decoder module is for identifying that read write line sends the steering order of gating respective antenna unit, the control signal of the low and high level then sent to radio-frequency switch module by signal control module, triggers radio-frequency switch module gating respective antenna unit.
7. a kind of hyperchannel ultrahigh-frequency radio-frequency identification system as claimed in claim 1, is characterized in that: at the second Hi-pass filter and relay amplifier of connecting between radio-frequency switch module, amplifies the radiofrequency signal sent and receive for realizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573765.4A CN104331720A (en) | 2014-10-24 | 2014-10-24 | Multichannel ultrahigh radio frequency identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410573765.4A CN104331720A (en) | 2014-10-24 | 2014-10-24 | Multichannel ultrahigh radio frequency identification system |
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| Publication Number | Publication Date |
|---|---|
| CN104331720A true CN104331720A (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410573765.4A Pending CN104331720A (en) | 2014-10-24 | 2014-10-24 | Multichannel ultrahigh radio frequency identification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410368A (en) * | 2016-11-16 | 2017-02-15 | 中科微声（天津）传感技术有限公司 | Multifunctional antenna |
| CN106652427A (en) * | 2016-12-14 | 2017-05-10 | 南京长峰航天电子科技有限公司 | Serial control system of electronic array |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239688A (en) * | 1990-03-17 | 1993-08-24 | Robert Bosch Gmbh | Multi-range, multi-use antenna adapter |
| CN201374699Y (en) * | 2009-03-16 | 2009-12-30 | 中国移动通信集团公司 | Interface equipment of electrical modulating antenna |
| CN103632178A (en) * | 2013-12-11 | 2014-03-12 | 威海北洋电气集团股份有限公司 | RFID dense archives management device and application method thereof |
| CN204166552U (en) * | 2014-10-24 | 2015-02-18 | 厦门信达物联科技有限公司 | A kind of hyperchannel ultrahigh-frequency radio-frequency identification system |
-
2014
- 2014-10-24 CN CN201410573765.4A patent/CN104331720A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239688A (en) * | 1990-03-17 | 1993-08-24 | Robert Bosch Gmbh | Multi-range, multi-use antenna adapter |
| CN201374699Y (en) * | 2009-03-16 | 2009-12-30 | 中国移动通信集团公司 | Interface equipment of electrical modulating antenna |
| CN103632178A (en) * | 2013-12-11 | 2014-03-12 | 威海北洋电气集团股份有限公司 | RFID dense archives management device and application method thereof |
| CN204166552U (en) * | 2014-10-24 | 2015-02-18 | 厦门信达物联科技有限公司 | A kind of hyperchannel ultrahigh-frequency radio-frequency identification system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410368A (en) * | 2016-11-16 | 2017-02-15 | 中科微声（天津）传感技术有限公司 | Multifunctional antenna |
| CN106410368B (en) * | 2016-11-16 | 2023-09-22 | 苏州光声纳米科技有限公司 | Multifunctional antenna |
| CN106652427A (en) * | 2016-12-14 | 2017-05-10 | 南京长峰航天电子科技有限公司 | Serial control system of electronic array |
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Application publication date: 20150204 |