CN206042003U - RFID electronic tags reads apart from testing arrangement - Google Patents
RFID electronic tags reads apart from testing arrangement Download PDFInfo
- Publication number
- CN206042003U CN206042003U CN201621043696.7U CN201621043696U CN206042003U CN 206042003 U CN206042003 U CN 206042003U CN 201621043696 U CN201621043696 U CN 201621043696U CN 206042003 U CN206042003 U CN 206042003U
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- duplexer
- antenna
- write line
- read write
- amplifier
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Abstract
The utility model relates to a RFID electronic tags reads apart from testing arrangement, including ARM treater, reader -writer chip, transmission passageway, receive channel, duplexer and test antenna, the ARM treater passes through control bus and is connected with reader -writer chip, transmission passageway and receive channel, the ARM treater pass through RS232 communication interface and upper computer connection, reader -writer chip's the transmission port of transmission port through launching the path connection duplexer, reader -writer chip's receive port passes through the receive port that receive channel connects the duplexer, test antenna connects the antenna end mouth of duplexer. The utility model discloses a fixed test mode of distance does not need the label apart from adjusting device between test antenna and the label, transmit power dynamic is big, conveniently tests the label that various read -write distance are different, high and the process calibration of transmit power resolution ratio ensures that the test result possesses high accuracy and accuracy.
Description
Technical field
This utility model is related to a kind of RFID test, particularly tag read distance test.
Background technology
FRID is a kind of noncontact automatic identification technology, its ultimate principle be using radiofrequency signal and space propagation characteristic,
Realize the automatic identification to being identified object.Recently as the development of Internet of Things industry, RFID technique has obtained widely should
With.
One RFID system is generally made up of application system, read write line, antenna, RFID.RFID system wants energy
Obtain correct identification information it may first have to ensure that RFID is qualified.One important indicator of electronic tag is
Maximum reading/writing distance, which is meant that the ultimate range that can be read out to electronic tag under regulation transmission power.Conventional survey
Examination mode is that transmission power is fixed on setting fixed antenna position, then adjust electronic tag between antenna away from
From when the maximum reading/writing distance for being adjusted to a farthest distance that can be read and write as electronic tag.But this mode has
One very big defect is to need a mechanical type tag distances adjusting means, and translational speed is slower, and detection time is long, only
It is adapted to the validation test of single label, as the occasion quickly tested to a large amount of labels by some needs cannot just meet.
Such as electronic tag manufacturer typically adopts production line balance, needs quickly to test substantial amounts of label one by one, then goes up
The mode stated just less is suitable for.
Utility model content
A kind of RFID reading distance of simple, low cost is provided to solve problem above this utility model
Test device.This device can determine the maximum reading/writing distance of label, the test device low cost, and test speed is fast, electronic tag
It is fixed with the distance between test antenna, it is not necessary to electronic tag distance adjusting means.
For achieving the above object, this utility model provides following technical scheme：A kind of RFID reads distance and surveys
Trial assembly is put, it is characterised in that including arm processor, read write line chip, transmission channel, receiving channel, duplexer and test days
Line；
Arm processor is connected with read write line chip, transmission channel and receiving channel by controlling bus；Arm processor leads to
Cross LAN/USB RS232 communication interfaces be connected with host computer；The emission port of read write line chip is by transmission channel connection duplex
The emission port of device；The receiving port of read write line chip connects the receiving port of duplexer by receiving channel；Test antenna connects
Connect the antenna port of duplexer.
Transmission channel includes wave filter, attenuator, amplifier and power amplifier；Send from the TX pins of read write line chip
Signal is taken inventory, is then fed in transmission channel, pass sequentially through wave filter, amplifier, attenuator and the power amplification of transmission channel
Device, signal are out sent to duplexer from power amplifier, are finally transmitted into electronic tag by duplexer by antenna.
Receiving channel includes attenuator, wave filter and amplifier；The reflected signal of electronic tag is received by the antenna, Ran Houjing
Duplexer sends into receiving channel, passes sequentially through attenuator, wave filter and the amplifier of receiving channel, signal from amplifier out after
The RX pins of read write line chip are sent to, last read write line chip can be demodulated to signal, obtain the concrete of electronic tag return
Information simultaneously notifies arm processor.
Radio frequency transmissions power from the output of diplexer antenna port is calibrated, it is ensured that the accuracy of performance number；Test
Fixed range is adopted between antenna and electronic tag；Arm processor gradually increases transmission power by controlling transmission channel, until
A marginal value that can just read label is reached, electronic tag maximum reading/writing distance is calculated by critical transmission power level.
The test mode that this utility model is fixed using distance between test antenna and label, it is not necessary to which tag distances are adjusted
Device；Transmission power dynamic range is big, convenient to test the different label of various reading/writing distances；Transmission power high resolution and process
Calibration, it is ensured that test result possesses high accuracy and accuracy；System is controlled and numerical computations adopt high speed arm processor, power
Change is realized using the high speed integrated circuit such as adjustable attenuator and amplifier so that test speed is quickly.
Description of the drawings
Fig. 1 is composition frame chart of the present utility model.
The schematic diagram of Fig. 2 transmission channels and receiving channel.
Specific embodiment
The utility model is described in more detail below in conjunction with the accompanying drawings.
As shown in figure 1, this utility model provides a kind of RFID reads distance test device, at ARM
Reason device, read write line chip, transmission channel, receiving channel, duplexer and test antenna；Arm processor passes through controlling bus and reading
Write the connection of device chip, transmission channel and receiving channel；Arm processor by LAN/USB RS232 communication interfaces and host computer connect
Connect；The emission port of read write line chip connects the emission port of duplexer by transmission channel；The receiving port of read write line chip
The receiving port of duplexer is connected by receiving channel；Test antenna connects the antenna port of duplexer.
As shown in Fig. 2 transmission channel includes wave filter, adjustable radio frequency attenuator, tunable radio frequency amplifier and power amplification
Device；Receiving channel includes adjustable radio frequency attenuator and tunable radio frequency amplifier.
Receiving channel includes adjustable radio frequency attenuator, wave filter and tunable radio frequency amplifier；The reflected signal of electronic tag
It is received by the antenna, then Jing duplexers send into receiving channel, pass sequentially through attenuator, wave filter and the amplifier of receiving channel,
Signal is out sent to the RX pins of read write line chip afterwards from amplifier, and last read write line chip can be demodulated to signal, obtain
The specifying information of electronic tag return simultaneously notifies arm processor.
Signal sends：Send from the TX pins of read write line chip and take inventory signal, be then fed in transmission channel, pass sequentially through
The wave filter of transmission channel, amplifier, attenuator and power amplifier, signal are out sent to duplexer from power amplifier,
Electronic tag is transmitted into by antenna by duplexer finally.
Signal is received:The reflected signal of electronic tag is received by the antenna, and then Jing duplexers send into receiving channel, lead to successively
Attenuator, wave filter and the amplifier of receiving channel is crossed, signal is out sent to the RX pins of read write line chip afterwards from amplifier, most
Read write line chip can be demodulated to signal afterwards, obtained the specifying information of electronic tag return and notified arm processor.
The course of work of this device is as follows：The arm processor of this device by LAN/USB the communication interface such as RS232 receive
The test command of host computer, nominative testing frequency, power bracket in order.Then arm processor control read write line chip is with solid
Determine power production electronic tag and take inventory signal, signal passes through duplexer, antenna after transmission channel adjustment transmission power, then
Electronic tag is sent to electromagnetic wave, if electromagnetic wave energy activates label enough, electronic tag can reflect answer signal,
After antenna receives answer signal, Jing duplexers send into receiving channel, decay to a suitable power in receiving channel, finally
Read write line chip is sent to, arm processor reads the result taken inventory from read write line chip.Arm processor control is initiated repeatedly to take inventory
Signal adjusts transmission power and appropriate adjustment receiving channel gain simultaneously from small to large, has response when label is entered from nonreply
During critical state, stop taking inventory, then calculate the maximum reading/writing distance of electronic tag according to transmission power now.Last ARM
Processor reports host computer maximum reading/writing distance value and completes once to test.
Preferred embodiment of the present utility model is the foregoing is only, this utility model is not restricted to, for ability
For the technical staff in domain, this utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle it
Interior, any modification, equivalent substitution and improvements made etc. are should be included within right of the present utility model.
Claims (3)
1. a kind of RFID reads distance test device, it is characterised in that including arm processor, read write line chip, send out
Penetrate passage, receiving channel, duplexer and test antenna；Arm processor by controlling bus and read write line chip, transmission channel and
Receiving channel connects；Arm processor by LAN/USB RS232 communication interfaces be connected with host computer；The transmitting of read write line chip
Port connects the emission port of duplexer by transmission channel；The receiving port of read write line chip is by receiving channel connection duplex
The receiving port of device；Test antenna connects the antenna port of duplexer.
2. a kind of RFID according to claim 1 reads distance test device, it is characterised in that transmission channel
Including wave filter, attenuator, amplifier and power amplifier；Send from the TX pins of read write line chip and take inventory signal, then send
Enter in transmission channel, pass sequentially through wave filter, amplifier, attenuator and the power amplifier of transmission channel, signal is put from power
Big device is out sent to duplexer, is finally transmitted into electronic tag by duplexer by antenna.
3. a kind of RFID according to claim 1 reads distance test device, it is characterised in that receiving channel
Including attenuator, wave filter and amplifier；The reflected signal of electronic tag is received by the antenna, and then Jing duplexers are sent into and receive logical
Road, passes sequentially through attenuator, wave filter and the amplifier of receiving channel, and signal is out sent to read write line chip afterwards from amplifier
RX pins, last read write line chip can be demodulated to signal, are obtained the specifying information of electronic tag return and are notified ARM process
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621043696.7U CN206042003U (en) | 2016-09-08 | 2016-09-08 | RFID electronic tags reads apart from testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621043696.7U CN206042003U (en) | 2016-09-08 | 2016-09-08 | RFID electronic tags reads apart from testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206042003U true CN206042003U (en) | 2017-03-22 |
Family
ID=58298747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621043696.7U Active CN206042003U (en) | 2016-09-08 | 2016-09-08 | RFID electronic tags reads apart from testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206042003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449531A (en) * | 2021-06-25 | 2021-09-28 | 无锡科睿坦电子科技股份有限公司 | Method and device for automatically testing read-write distance of RFID (radio frequency identification) tag |
-
2016
- 2016-09-08 CN CN201621043696.7U patent/CN206042003U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449531A (en) * | 2021-06-25 | 2021-09-28 | 无锡科睿坦电子科技股份有限公司 | Method and device for automatically testing read-write distance of RFID (radio frequency identification) tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |