CN107729783A - A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system - Google Patents
A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system Download PDFInfo
- Publication number
- CN107729783A CN107729783A CN201711011313.7A CN201711011313A CN107729783A CN 107729783 A CN107729783 A CN 107729783A CN 201711011313 A CN201711011313 A CN 201711011313A CN 107729783 A CN107729783 A CN 107729783A
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- China
- Prior art keywords
- antenna port
- module
- resistance
- radio
- rfid
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10118—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the sensing being preceded by at least one preliminary step
- G06K7/10128—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the sensing being preceded by at least one preliminary step the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
Abstract
The invention discloses a kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system, including transceiver insulation module, antenna port control module, radio-frequency switch module and antenna port detection module；Transceiver insulation module is connected with antenna port control module and radio-frequency switch module respectively, radio-frequency switch module connection antenna port detection module.The present invention increases one-level radio-frequency switch module and antenna port detection module in receiving channel, radio-frequency switch module is connected into receiving channel and antenna port detection module, then transmission channel is controlled respectively from antenna port 1, launches antenna port 2 ... respectively, reflection in no connection antenna or the port for not being reliably connected antenna can be more much larger than the reflection for the port for being reliably connected antenna, the state of antenna port is detected by detecting the reflection power of antenna port, available antenna port is limited within some port ranges for being securely connected antenna, it ensure that the system safety of read write line.
Description
Technical field
The invention belongs to ultra-high frequency RFID technology field, more particularly to a kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detection
System.
Background technology
Radio frequency identification (Radio Frequency Identification, RFID), electronic tag (E-Tag), it is a kind of
Using radiofrequency signal automatic identification destination object and obtain the technology of relevant information.With advances in technology, RFID application fields
Expand day by day, be related to the various aspects of people's daily life, and by as Future Information social construction basis
Technology.
RFID typical cases include：It is used for storehouse management, production line automation, commodity sale in logistics field；Handing over
Logical transport field is used for container and parcel management, expressway tol lcollection and Car park payment；It is used for flock of sheep, fish in farming, animal husbandry and fishery
The management of class, fruit etc. and pet, wild animal tracking；It is used for pharmaceutical production, patient nursing, medical waste in medical industry
Tracking；It is used for parts and the visualized management of stock in manufacturing industry；RFID can also be applied to books and document management, gate inhibition
Management, positioning and object tracking, environment sensing and a variety of application fields such as check is false proof.
Super high frequency radio frequency recognition read-write machine has the characteristics that remote identification, multi-tag identification, efficiency high, with Internet of Things
The development of technology, super high frequency radio frequency recognition read-write machine is widely used in logistics, staff attendance, asset management, storehouse raw material are made an inventory
The several scenes such as management and construction of military informatization.
Generally, most of radio-frequency identification reader/writer can support the antenna port of 4 road transmit-receive sharings, but actual
In application scenarios, not 4 road antenna ports are all connected to antenna use；On the other hand, due to cable and antenna, cable and day
Reliability, radio-frequency maser quality and the coaxial cable reliable in quality sex chromosome mosaicism connected between line end mouth, even if user is by normal
Flow is connected to antenna port and antenna with coaxial cable, and also there is a strong possibility brings very big standing wave to launch, and thus brings
Great risk is exactly read write line power amplifier, the damage for receiving low-noise amplifier, even receives burning for demodulator, to reading
Write the wound that device brings unrepairable.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of reflection power by detecting antenna port
To detect the state of antenna port, available antenna port is limited within some port ranges for being securely connected antenna
Ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system.
The purpose of the present invention is achieved through the following technical solutions：A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port inspection
Examining system, including transceiver insulation module, antenna port control module, radio-frequency switch module and antenna port detection module：
The transceiver insulation module is used to isolate the radiofrequency signal that read write line sends and received；
The antenna port control module is used to control transmission signal from different antenna ports to launch, and receives simultaneously
The label signal of return；
The radio-frequency switch module is used for the reflection power for detecting read write line, is provided for read write line available antenna port original
Foundation；
The antenna port detection module is used for when antenna port control module is switched to any one antenna port, inspection
The reflection power of read write line is surveyed, and judges the connection status of the antenna port on this basis；
Transceiver insulation module is connected with antenna port control module and radio-frequency switch module respectively, radio-frequency switch module connection
Antenna port detection module.
Further, the antenna port detection module includes coupled capacitor C1, C3, C5, C6, C7, receiving channel low noise
Acoustic amplifier U1, attenuation network, matching network of decaying, radiofrequency power detector U4, DC level output filter circuit；
Radio-frequency switch module U3 the first radio frequency interface RF1 is sequentially connected coupled capacitor C1, attenuation network, coupled capacitor C3
The input port with receiving channel low-noise amplifier U1 is connected afterwards, receiving channel low-noise amplifier U1 output port connection
With coupled capacitor C5；
Radio-frequency switch module U3 the second radio frequency interface RF2 is successively with coupled capacitor C6, decay matching network and coupling electricity
Radiofrequency power detector U4 input, radiofrequency power detector U4 output end connection DC level output filter are connected after appearance C7
Wave circuit.
Further, it is connected with and puts between the input port and coupled capacitor C3 of the receiving channel low-noise amplifier U1
Big device matching inductance L1, amplifier matching inductance L1 are grounded by amplifier matching capacitance C4.
Further, the attenuation network is used to decay to the input signal of reception, prevents input signal exceedes from connecing
Receive passage low-noise amplifier U1 input 1dB compression points；Attenuation network includes resistance R1, R2, R3, resistance R2 both ends difference
Connect coupled capacitor C1 and coupled capacitor C3；Resistance R2 both ends are also grounded by resistance R1 and resistance R3 respectively.
Further, the decay matching network is used to decay to reflected signal, and anti-stop signal exceedes radio-frequency power
Wave detector U4 linear transformation scope.Decay pair net includes resistance R4, R5, R6, resistance R5 both ends respectively with coupled capacitor
C6 is connected with coupled capacitor C7, and resistance R5 both ends are also grounded by resistance R4 and resistance R6 respectively.
Further, the DC level output filter circuit is used for the direct current for filtering out radiofrequency power detector U4 outputs
Noise in ordinary mail number, maintain signal stabilization.DC level output filter circuit includes resistance R7, electric capacity C10 and electric capacity C12,
Resistance R7 one end is connected with radiofrequency power detector U4 output port, and the resistance R7 other end is switch detection output signal
Output end；Resistance R7 both ends are grounded by electric capacity C10 and electric capacity C12 respectively.
Further, the input signal port of the radio-frequency switch module U3 is connected with coupled capacitor C2.
The beneficial effects of the invention are as follows：
1st, the present invention increases one-level radio-frequency switch module and antenna port detection module in receiving channel, by RF switch mould
Block connects receiving channel and antenna port detection module, then controls transmission channel respectively from antenna port 1, antenna port
2 ... launch respectively, and the reflection in no connection antenna or the port for not being reliably connected antenna can be than being reliably connected day
The reflection of the port of line is much larger, and the state of antenna port is detected by detecting the reflection power of antenna port, will be available
Antenna port is limited within some port ranges for being securely connected antenna, it is ensured that the system safety of read write line；
2nd, the present invention can carry out antenna port connection status automatic detection, without manual intervention, suitable for coaxial cable,
Reliably whether automatic automatic detection, antenna connector be reliably with read write line connection reliability automatic detection, radio-frequency maser for antenna
The detection of the occasions such as detection, the qualitative automatic detection of antenna standing wave ratio and read write line available antenna port automatic detection；While
It is adapted to the detection of single antenna port and multi-antenna port；
3rd, multiple attenuator circuits are provided with antenna port control module, overcurrent protection can be carried out to read write line, prevent from reading
Device is write to be burned.
Brief description of the drawings
Fig. 1 is the ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system structural representation of the present invention；
Fig. 2 is that the ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system antenna port detection module of the present invention and radio frequency are opened
Close module circuit diagram.
Embodiment
The present invention increases one-level radio-frequency switch module and antenna port detection module in receiving channel.In system initialization
When, radio-frequency switch module is connected into receiving channel and antenna port detection module, then controls transmission channel respectively from antenna end
Mouth 1, launches antenna port 2 ... respectively.Obviously, in the anti-of no connection antenna or the port that is not reliably connected antenna
The reflection for penetrating port that can be than being reliably connected antenna is much larger.The technical side of the present invention is further illustrated below in conjunction with the accompanying drawings
Case.
As shown in figure 1, a kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system, including transceiver insulation module, antenna
Port control modules, radio-frequency switch module and antenna port detection module：
The transceiver insulation module is used to isolate the radiofrequency signal that read write line sends and received；
The antenna port control module is used to control transmission signal from different antenna ports to launch, and receives simultaneously
The label signal of return；
The radio-frequency switch module, in system initialization, this switch is switched to antenna port detection module, for examining
The reflection power of read write line is surveyed, original foundation is provided for read write line available antenna port；
The antenna port detection module is used for when antenna port control module is switched to any one antenna port, inspection
The reflection power of read write line is surveyed, and judges the connection status of the antenna port on this basis；
Transceiver insulation module is connected with antenna port control module and radio-frequency switch module respectively, radio-frequency switch module connection
Antenna port detection module.
As shown in Fig. 2 the antenna port detection module of the present invention includes coupled capacitor C1, C3, C5, C6, C7, receiving channel
Low-noise amplifier U1, attenuation network, matching network of decaying, radiofrequency power detector U4, DC level output filter circuit；
Radio-frequency switch module U3 the first radio frequency interface RF1 is sequentially connected coupled capacitor C1, attenuation network, coupled capacitor C3
The input port with receiving channel low-noise amplifier U1 is connected afterwards, receiving channel low-noise amplifier U1 output port connection
With coupled capacitor C5；
Radio-frequency switch module U3 the second radio frequency interface RF2 is successively with coupled capacitor C6, decay matching network and coupling electricity
Radiofrequency power detector U4 input, radiofrequency power detector U4 output end connection DC level output filter are connected after appearance C7
Wave circuit.
Further, it is connected with and puts between the input port and coupled capacitor C3 of the receiving channel low-noise amplifier U1
Big device matching inductance L1, amplifier matching inductance L1 are grounded by amplifier matching capacitance C4.
Further, the attenuation network is used to decay to the input signal of reception, prevents input signal exceedes from connecing
Receive passage low-noise amplifier U1 input 1dB compression points；Attenuation network includes resistance R1, R2, R3, resistance R2 both ends difference
Connect coupled capacitor C1 and coupled capacitor C3；Resistance R2 both ends are also grounded by resistance R1 and resistance R3 respectively.
Further, the decay matching network is used to decay to reflected signal, and anti-stop signal exceedes radio-frequency power
Wave detector U4 linear transformation scope.Decay pair net includes resistance R4, R5, R6, resistance R5 both ends respectively with coupled capacitor
C6 is connected with coupled capacitor C7, and resistance R5 both ends are also grounded by resistance R4 and resistance R6 respectively.
Further, the DC level output filter circuit is used for the direct current for filtering out radiofrequency power detector U4 outputs
Noise in ordinary mail number, maintain signal stabilization.DC level output filter circuit includes resistance R7, electric capacity C10 and electric capacity C12,
Resistance R7 one end is connected with radiofrequency power detector U4 output port, and the resistance R7 other end is switch detection output signal
Output end；Resistance R7 both ends are grounded by electric capacity C10 and electric capacity C12 respectively.
Further, the input signal port of the radio-frequency switch module U3 is connected with coupled capacitor C2.
In practical application, the circuit theory diagrams of radio-frequency switch module and antenna port detection module are as shown below, wherein
Electric capacity C1, C2, C3, C5, C6, C7 are coupled capacitor.U1 is the low-noise amplifier of receiving channel, and electric capacity C4, inductance L1 are it
Input matching, resistance R1, R2, R3 form attenuation network, and the decay of appropriateness is carried out to receiving input signal, prevent from receiving input letter
It is number excessive so that receiving the input 1dB compression points of low-noise amplifier more than U1；U3 is radio-frequency switch module, system initialization
When, according to the instruction of switch controlling signal, UNICOM receives input and antenna detection module, i.e. RFC and RF2 UNICOMs, according to each
The antenna connection of antenna port, detects reflection power, and this reflection power is converted to direct current by radiofrequency power detector U4
Flat output, to indicate the value of reflection power.Resistance R4, R5, R6 are decay matching network, and carrying out appropriateness to reflected signal declines
Subtract, anti-stop signal is excessive so that linear transformation scope more than radiofrequency power detector U4.Resistance R7, C10, C12 are direct current
Flat output filter circuit, the noise in output DC level signal is filtered out, maintains signal stabilization.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.This area
Those of ordinary skill can make according to these technical inspirations disclosed by the invention various does not depart from the other each of essence of the invention
The specific deformation of kind and combination, these deform and combined still within the scope of the present invention.
Claims (10)
1. a kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system, it is characterised in that including transceiver insulation module, antenna end
Mouth control module, radio-frequency switch module and antenna port detection module：
The transceiver insulation module is used to isolate the radiofrequency signal that read write line sends and received；
The antenna port control module is used to control transmission signal from different antenna ports to launch, while receives return
Label signal；
The radio-frequency switch module is used to detect the reflection power of read write line, for read write line available antenna port provide it is original according to
According to；
The antenna port detection module is used for when antenna port control module is switched to any one antenna port, and detection is read
The reflection power of device is write, and judges the connection status of the antenna port on this basis；
Transceiver insulation module is connected with antenna port control module and radio-frequency switch module respectively, radio-frequency switch module connection antenna
Port detecting module.
2. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 1, it is characterised in that the antenna
Port detecting module includes coupled capacitor C1, C3, C5, C6, C7, receiving channel low-noise amplifier U1, attenuation network, decay
Distribution network, radiofrequency power detector U4, DC level output filter circuit；
Radio-frequency switch module U3 the first radio frequency interface RF1 be sequentially connected after coupled capacitor C1, attenuation network, coupled capacitor C3 with
Receiving channel low-noise amplifier U1 input port is connected, receiving channel low-noise amplifier U1 output port connection and coupling
Close electric capacity C5；
Radio-frequency switch module U3 the second radio frequency interface RF2 successively with coupled capacitor C6, decay matching network and coupled capacitor C7
Radiofrequency power detector U4 input, radiofrequency power detector U4 output end connection DC level output filtered electrical are connected afterwards
Road.
3. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2, it is characterised in that the reception
Amplifier matching inductance L1, amplifier matching are connected between passage low-noise amplifier U1 input port and coupled capacitor C3
Inductance L1 is grounded by amplifier matching capacitance C4.
4. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2, it is characterised in that the decay
Network is used to decay to the input signal of reception, prevents input signal from exceeding receiving channel low-noise amplifier U1 input
1dB compression points.
5. the ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2 or 4, it is characterised in that described
Attenuation network includes resistance R1, R2, R3, and resistance R2 both ends connect coupled capacitor C1 and coupled capacitor C3 respectively；Resistance R2's
Both ends are also grounded by resistance R1 and resistance R3 respectively.
6. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2, it is characterised in that the decay
Matching network is used to decay to reflected signal, and anti-stop signal exceedes radiofrequency power detector U4 linear transformation scope.
7. the ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2 or 6, it is characterised in that described
Decay pair net includes resistance R4, R5, R6, and resistance R5 both ends are connected with coupled capacitor C6 and coupled capacitor C7 respectively, resistance
R5 both ends are also grounded by resistance R4 and resistance R6 respectively.
8. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2, it is characterised in that the direct current
Level output filter circuit is used to filter out the noise in the DC level signal of radiofrequency power detector U4 outputs, maintains signal steady
It is fixed.
9. the ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2 or 8, it is characterised in that described
DC level output filter circuit includes resistance R7, electric capacity C10 and electric capacity C12, resistance R7 one end and radiofrequency power detector
U4 output port is connected, and the resistance R7 other end detects the output end of output signal for switch；Resistance R7 both ends lead to respectively
Cross electric capacity C10 and electric capacity C12 ground connection.
10. ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system according to claim 2, it is characterised in that described to penetrate
Frequency switch module U3 input signal port is connected with coupled capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011313.7A CN107729783A (en) | 2017-10-26 | 2017-10-26 | A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011313.7A CN107729783A (en) | 2017-10-26 | 2017-10-26 | A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN107729783A true CN107729783A (en) | 2018-02-23 |
Family
ID=61212786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711011313.7A Pending CN107729783A (en) | 2017-10-26 | 2017-10-26 | A kind of ultrahigh frequency radio frequency identification (RFID) reader antenna port detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109101853A (en) * | 2018-07-30 | 2018-12-28 | 成都九洲电子信息系统股份有限公司 | A kind of radio-frequency identification reader/writer system protection and antenna port detection system |
| CN111181661A (en) * | 2020-01-17 | 2020-05-19 | 深圳市资福医疗技术有限公司 | Method for detecting antenna connection state |
| CN112261687A (en) * | 2020-10-22 | 2021-01-22 | 北京计算机技术及应用研究所 | Air interface signal interference detection method for ultrahigh frequency RFID system |
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| CN103218642A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Multi-antenna ultrahigh frequency electronic tag reader |
| CN203813772U (en) * | 2014-04-25 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Receiving circuit, receiving link, and on board unit |
| CN205792605U (en) * | 2016-05-30 | 2016-12-07 | 天津中兴智联科技有限公司 | A kind of antenna standing wave detecting device |
| EP3190539A1 (en) * | 2016-01-07 | 2017-07-12 | Panthronics AG | Target detection by rfid reader |
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2017
- 2017-10-26 CN CN201711011313.7A patent/CN107729783A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103218642A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Multi-antenna ultrahigh frequency electronic tag reader |
| CN203813772U (en) * | 2014-04-25 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Receiving circuit, receiving link, and on board unit |
| EP3190539A1 (en) * | 2016-01-07 | 2017-07-12 | Panthronics AG | Target detection by rfid reader |
| CN205792605U (en) * | 2016-05-30 | 2016-12-07 | 天津中兴智联科技有限公司 | A kind of antenna standing wave detecting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109101853A (en) * | 2018-07-30 | 2018-12-28 | 成都九洲电子信息系统股份有限公司 | A kind of radio-frequency identification reader/writer system protection and antenna port detection system |
| CN109101853B (en) * | 2018-07-30 | 2021-07-27 | 成都九洲电子信息系统股份有限公司 | Radio frequency identification reader-writer system protection and antenna port detection system |
| CN111181661A (en) * | 2020-01-17 | 2020-05-19 | 深圳市资福医疗技术有限公司 | Method for detecting antenna connection state |
| CN112261687A (en) * | 2020-10-22 | 2021-01-22 | 北京计算机技术及应用研究所 | Air interface signal interference detection method for ultrahigh frequency RFID system |
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Inventor after: Yang Lin Inventor after: Han Nenghua Inventor before: Han Nenghua |
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Application publication date: 20180223 |