CN101655899A - Method and system for evaluating radio frequency identification electronic label - Google Patents
Method and system for evaluating radio frequency identification electronic label Download PDFInfo
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- CN101655899A CN101655899A CN200810118623A CN200810118623A CN101655899A CN 101655899 A CN101655899 A CN 101655899A CN 200810118623 A CN200810118623 A CN 200810118623A CN 200810118623 A CN200810118623 A CN 200810118623A CN 101655899 A CN101655899 A CN 101655899A
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Abstract
The invention provides a method and a system for evaluating a radio frequency identification electronic label. The method comprises that: A1, a reader generates a signal comprising a first instruction; A2, the signal currently generated by the reader is transmitted to an antenna; A3, the antenna transmits the received signal to the radio frequency identification electronic label; A4, that whetherthe radio frequency identification electronic label can normally respond to the first instruction or not is judged, and if the radio frequency identification electronic label can normally respond to the first instruction, the reader generates the signal comprising the instruction at a first operating frequency point and at second output power which is a predetermined digital value lower than firstoutput power, and returns to the step A2, otherwise, the reader enters a step A5; and A5, the last output power of the reader is recorded as the lowest power at which the radio frequency identification electronic label is normally started at the first frequency point. The method and the system for evaluating the radio frequency identification electronic label realize the evaluation on the frequency point performance of the radio frequency identification electronic label in a working frequency band.
Description
Technical field
The present invention relates to the test of radio-frequency (RF) identification, specifically, is a kind of method and system of assessing radio frequency recognizing electronic label.
Background technology
Radio-frequency (RF) identification (Radio Frequency Identification, RFID) technology is a kind of non-contact automatic identification technology that utilizes radio communication to realize, it is by the automatic recognition objective object of radiofrequency signal and obtain related data, identification work need not manual intervention, can work in various rugged surroundings.The RFID technology is considered to one of the most rising technology of 21 century, is applied to industries such as logistics, manufacturing, public information service management and operational paradigm can significantly be provided, and reduces cost.
The RFID electronic tag has characteristics such as volume is little, capacity is big, reusable, supports fast reading and writing, non-visual recognition, mobile identification, multiple goal identification and long-term follow management.
RFID can be widely used has also determined it itself is a technology that the customization degree is high, and different application systems needs different labels just can meet specific requirement.And tag class in the market is various, the different product of different manufacturers product and even same producer, and technical parameter has nothing in common with each other, and performance also there are differences.Can not screen label miscellaneous when prior art also has a kind of method of the RFID of assessment electronic tag, find the label of suitable application scenarios, solve the problem of label type selecting in the rfid system integrating process, for the successful implementation of system lays the first stone.
Summary of the invention
The purpose of this invention is to provide the method and system of assessing radio frequency recognizing electronic label, the normal lowest power that starts of the frequency of evaluation and test radio frequency recognizing electronic label.
To achieve these goals, the embodiment of the invention provides a kind of method of assessing radio frequency recognizing electronic label, comprising:
Steps A 1, reader produces the signal that comprises first instruction in first working frequency points and first output power, and described first output power is the peak power output of reader;
Steps A 2, the signal of described first instruction sends to antenna with comprising of the current generation of described reader;
Steps A 3, the radio frequency recognizing electronic label of described sky alignment and described antenna spacing preset distance sends the signal that receives;
Steps A 4, judge whether described radio frequency recognizing electronic label can normal response described first instruct, if enter, described reader produces the signal that comprises described instruction in first working frequency points and second output power that is lower than the described first output power predetermined value, return steps A 2, otherwise enter steps A 5;
Steps A 5 is noted down the lowest power that normally starts at first frequency for described radio frequency recognizing electronic label with the output power of described reader last time.
Above-mentioned method wherein, also comprises:
Steps A 6, repeating said steps A1 obtains the normal lowest power that starts of described radio frequency recognizing electronic label each frequency in the frequency range that can work to steps A 5.
Above-mentioned method, wherein, the value of first working frequency points in the described steps A of carrying out 1 is the minimum value of described radio frequency recognizing electronic label in the frequency range that can work for the first time, and the value of first working frequency points in the described steps A of carrying out after carrying out for the first time 1 increases the value that obtains after the default step-length for the value of the first last working frequency points.
Above-mentioned method wherein, also comprises:
Step B1, reader produces the signal that comprises second instruction, and described second instruction is for meeting the instruction of first agreement;
Step B2, the signal of described second instruction sends to antenna with comprising of the current generation of described reader;
Step B3, the signal that alignment radio frequency recognizing electronic label emission in described day receives;
Step B4, when described reader did not report an error and passes through checking, corresponding described first agreement and second of preserving was instructed.
Above-mentioned method wherein, also comprises:
Step B5, repeating said steps B1 be to step B4, preserves to belong to that the described reader of making of described first agreement does not report an error and all instructions during by checking.
Above-mentioned method wherein, also comprises:
Step B6, repeating said steps B1 be to step B5, preserves to make described reader not report an error under each agreement and all instructions during by checking.
To achieve these goals, the embodiment of the invention also provides a kind of system that assesses radio frequency recognizing electronic label, comprising:
Reader is used to produce the signal that comprises first instruction;
Coupling mechanism is used to receive the described signal that comprises first instruction, and described signal is divided into first signal and secondary signal;
Antenna is connected with described coupling mechanism, launches after being used to obtain described first signal;
Measuring instrument is connected with described coupling mechanism, is used for obtaining current frequency of operation of described reader and emissive power according to described secondary signal;
The response determining device is used to judge whether described radio frequency recognizing electronic label is normal response to the response of described first instruction, obtains a judged result;
Controller is used for when described judged result indication response is normal response, and the current transmit power of controlling described reader reduces predetermined amplitude, is not normal response until described judged result indication response;
Register is used for when described judged result indication response is not normal response corresponding frequency of operation and the emissive power that once measures before the described power measurement instruments of preserving.
The embodiment of the invention has following beneficial effect:
The embodiment of the invention produces the signal that comprises first instruction by reader, and after sending the signal that receives by the radio frequency recognizing electronic label of sky alignment and described antenna spacing preset distance, judge whether described radio frequency recognizing electronic label can normal response described first instruct, if then reduce output power, can not normal response until electronic tag, this moment with the output power record of reader last time for described radio frequency recognizing electronic label at the normal lowest power that starts of first frequency.The embodiment of the invention has simply realized the measurement of radio frequency recognizing electronic label at the normal lowest power that starts of first frequency.
Description of drawings
Fig. 1 is the schematic flow sheet of the frequency Performance Evaluation of radio frequency recognizing electronic label working frequency range;
Fig. 2 is the synoptic diagram that utilizes radio frequency recognizing electronic label normal lowest power that starts at different frequency places that the method for the embodiment of the invention measures;
Fig. 3 is the structural representation of system that is used for the frequency Performance Evaluation of radio frequency recognizing electronic label working frequency range;
Fig. 4 is the schematic flow sheet of radio frequency recognizing electronic label agreement compliance assessment;
Fig. 5 is the schematic flow sheet of radio frequency recognizing electronic label memory block assessment;
Fig. 6 checks the schematic flow sheet of Performance Evaluation for radio frequency recognizing electronic label;
Fig. 7 is the schematic flow sheet of the directional sensitivity assessment of radio frequency recognizing electronic label;
Fig. 8 is the schematic flow sheet of the read assessment of radio frequency recognizing electronic label.
Embodiment
The method and system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is by the various performance index of a plurality of steps difference testing radio frequency identification electronic tags.
In the method for assessment radio frequency recognizing electronic label of the present invention, comprise following ten steps, comment the different performance index of radio frequency recognizing electronic label respectively, it specifically comprises:
Packing forms and external form are assessed, and obtain the physical dimension and the encapsulating material attribute of radio frequency recognizing electronic label;
The lowest power value of radio frequency recognizing electronic label when each frequency range can normally start obtained in the working frequency range assessment;
Agreement and instruction set that radio frequency recognizing electronic label can be supported are obtained in the assessment of agreement compliance when normal response;
Radio frequency recognizing electronic label memory block information when normal response is obtained in memory block capacity assessment;
Check Performance Evaluation, obtain reliably checking distance farthest and checking distance farthest of radio frequency recognizing electronic label;
Depend on material properties assessment, reliably checking distance farthest and checking distance farthest when obtaining radio frequency recognizing electronic label and being attached to different materials;
Radio frequency recognizing electronic label and the antenna lowest power value during normal startup under various different angles is obtained in directional sensitivity assessment;
The read operation Performance Evaluation obtains the reliable farthest read operation distance and the read operation distance farthest of radio frequency recognizing electronic label;
The write operation Performance Evaluation obtains the reliable farthest write operation distance of radio frequency recognizing electronic label and write operation distance farthest;
Assessment of cost obtains the cost of manufacture of radio frequency recognizing electronic label under various production quantities.
Respectively above-mentioned step is described in detail below.
＜packing forms and external form assessment 〉
Radio frequency recognizing electronic label will be attached to above the article, the physical dimension to label of different systems (length and width, thickness), pliability, reliability (working temperature, working relative humidity) require different, and these indexs all to be external form and packing forms by label decide, so tag package form and external form assessment specifically comprise:
Obtain the physical dimension and the encapsulating material attribute of radio frequency recognizing electronic label, it can be by measuring or verifying and obtain;
The physical dimension of preservation radio frequency recognizing electronic label and encapsulating material attribute are at database.
When there be clear and definite the requirement in system to tag package form and external form, then directly can screen according to the data in the database.
＜working frequency range assessment 〉
The assessment of label working frequency range need be obtained the lowest power value of radio frequency recognizing electronic label when each frequency range can normally start.
Radio frequency recognizing electronic label generally all can be operated in the frequency range of a broad, but is not that frequency performance all in frequency range is all the same.
As shown in Figure 1, the assessment of label working frequency range need be measured at each frequency, all comprises the steps: at any one frequency
Step 17 (not shown) is changed first frequency, and repeating step 11 obtains described radio frequency recognizing electronic label at the normal lowest power that starts of each frequency to step 16.
The working frequency range of supposing radio frequency recognizing electronic label is A MHz～B MHz, consider the lowest power when each frequency that can not testing radio frequency be identified in the electronic tag working frequency range normally starts, at this moment, can test A MHz, A+ (B-A)/n MHz, A+2 (B-A)/n MHz ..., the normal lowest power that starts of radio frequency recognizing electronic label during A+n (B-A)/this n+1 of nMHz frequency, certainly, this n can be provided with according to user's request.For the test of each frequency, all execution in step 11 can obtain radio frequency recognizing electronic label at the normal lowest power that starts of each frequency to step 16.
The value of first working frequency points in the described step of carrying out 11 is the minimum value (A MHz) of described radio frequency recognizing electronic label in the frequency range that can work for the first time, and the value of first working frequency points in the described step of carrying out after carrying out for the first time 11 increases the value that obtains after the default step-length ((B-A)/n MHz) for the value of the first last working frequency points.
In above-mentioned step, can normal response during instruction at radio frequency recognizing electronic label, described reader reduces current output power, the amplitude of this reduction can be according to different demand settings, as require the measuring accuracy height, then should the reduction amplitude can be smaller, otherwise can be greatly.
As shown in Figure 2, for utilizing the synoptic diagram of radio frequency recognizing electronic label normal lowest power that starts that method of the present invention measures at different frequency places, Fig. 3 is the broken line synoptic diagram after the assessment of label working frequency range, in the assessment high spot reviews label when in 840～960MHz frequency range, starting, the lowest power value that reader need send.
As shown in Figure 2, the lowest power minimum of the normal startup of radio frequency recognizing electronic label about the 920MHz frequency.
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used for the working frequency range assessment of radio frequency recognizing electronic label, as shown in Figure 3, comprising:
Reader is used to produce the signal that comprises instruction;
Coupling mechanism is used to receive the described signal that comprises instruction, and described signal is divided into first signal and secondary signal;
Antenna is launched after being used to obtain described first signal;
Measuring instrument is connected with coupling mechanism, is used for obtaining current frequency of operation of described reader and emissive power according to described secondary signal;
The response determining device is used for obtaining the response of radio frequency recognizing electronic label to the instruction of described first signal, judges that whether described response is normal response, obtains a judged result;
Controller is used for when described judged result indication response is normal response, and the current transmit power of controlling described reader reduces predetermined amplitude, is not normal response until described judged result indication response;
Register is used for preserving frequency of operation and emissive power that a preceding power measurement instruments measures when described judged result indication response is not normal response.
＜agreement compliance assessment 〉
The assessment of agreement compliance need be obtained agreement and the instruction set that radio frequency recognizing electronic label can be supported, as shown in Figure 4, the assessment of agreement compliance comprises the steps:
Change first agreement, repeating step 41 can obtain institute's protocols having and corresponding instruction set that radio frequency recognizing electronic label can be supported to step 49.
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used for the assessment of agreement compliance, comprising:
Reader is used to produce the signal that comprises first instruction, and described instruction meets first agreement;
Antenna is used for sending the signal that described reader produces to radio frequency recognizing electronic label;
Determining device is used to judge whether described reader reports an error, and whether judges described reader by checking, and obtains a judged result;
Controller, be used for described judged result indication reader report an error or verify not by the time, control described reader and produce other instructions that meet first agreement outside first instruction;
Register is used for not reporting an error at described judged result indication reader, and verifies when passing through the record present instruction.
Wherein, this instruction comprises each imperative instruction and optional instruction.
＜memory block assessment 〉
The memory block amount of capacity of radio frequency recognizing electronic label is mainly obtained in the memory block assessment.
Most of radio-frequency recognition systems not only need radio frequency recognizing electronic label can store an identification code, also want to store a certain amount of other information, the capacity of the desired radio frequency recognizing electronic label of different system schemas and extended capability memory block has nothing in common with each other.
As shown in Figure 5, the assessment of the memory block of the embodiment of the invention comprises the steps:
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used for the memory block assessment, comprising:
Reader is used to produce the signal that comprises the read operation instruction, comprises the size and the start address of memory block in the described read operation instruction;
Antenna is used for sending the signal that described reader produces to radio frequency recognizing electronic label;
Determining device is used to judge whether reading of data is successful, and obtains a judged result;
Controller, be used for when described judged result indication reading of data is unsuccessful, control described reader and produce the signal that comprises new read operation instruction, the memory block start address in the described new read operation instruction be the size of memory block of previous read operation instruction and start address and;
Register is used for when described judged result indication reading of data is successful the size and the start address of the memory block that comprises in the record present instruction.
＜check Performance Evaluation 〉
Checking Performance Evaluation is the performance of checking of assessment radio frequency recognizing electronic label.
The embodiment of the invention check Performance Evaluation need between test antenna and the radio frequency recognizing electronic label various distances check performance, since identical at the testing process of each distance, be that first distance is that example is elaborated with the distance between antenna and the radio frequency recognizing electronic label below.
As shown in Figure 6, the Performance Evaluation of checking of the embodiment of the invention comprises the steps:
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used to check Performance Evaluation, comprising:
Reader is used to produce the signal that comprises the instruction that is used to initiate continuous inventory operation;
Antenna is used for sending the signal that described reader produces to the radio frequency recognizing electronic label of different distance;
Register, be used to write down corresponding the checking the success ratio value and check speed of various distances between antenna and the radio frequency recognizing electronic label, also be used for writing down to obtain reliably checking distance farthest and checking distance farthest, the described distance of checking farthest is for checking success ratio greater than the maximal value in the distance set between 0 antenna and the radio frequency recognizing electronic label, and the described distance of reliably checking farthest is for checking success ratio greater than the maximal value in the antenna of preset value and the distance set between the radio frequency recognizing electronic label.
＜directional sensitivity assessment 〉
Changes of properties degree when radio frequency recognizing electronic label becomes different angles with reader antenna is judged the susceptibility of its direction.In general, because the gain when different angles of radio frequency recognizing electronic label and antenna is different, performance also has than big-difference.But most of radio-frequency recognition system all can not satisfy position and the angle that is completely fixed article, so the directional sensitivity of label can impact system performance.
The assessment of the directional sensitivity of specific embodiments of the invention with radio frequency recognizing electronic label and antenna when preset distance (as 1m), when radio frequency recognizing electronic label becomes different angles with antenna, at the normal lowest power that starts of default frequency, as shown in Figure 7, comprising:
Step 77 (not shown), repeating step 71 are obtained described radio frequency recognizing electronic label and described antenna at the normal lowest power that starts of all angles to step 76.
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used for the directional sensitivity assessment of radio frequency recognizing electronic label, comprising:
Reader is used to produce the signal that comprises instruction;
Coupling mechanism is used to receive the described signal that comprises instruction, and described signal is divided into first signal and secondary signal;
Antenna is used for to the interval preset distance, and becomes the radio frequency recognizing electronic label of first angle to send first signal that receives;
Measuring instrument is connected with coupling mechanism, is used for obtaining current frequency of operation of described reader and emissive power according to described secondary signal;
The response determining device is used for obtaining the response of radio frequency recognizing electronic label to the instruction of described first signal, judges that whether described response is normal response, obtains a judged result;
Controller is used for when described judged result indication response is normal response, and the current transmit power of controlling described reader reduces predetermined amplitude;
Register is used for when described judged result indication response is not normal response, preserves emissive power that a preceding power measurement instruments measures as described radio frequency recognizing electronic label normal lowest power that starts when being first angle with antenna.
＜read assessment 〉
The read/write operation performance of the main assessment tag of this step, for the radio-frequency recognition system of frequent use read/write operation, the quality of this performance can influence the performance of total system.
As shown in Figure 8, the read appraisal procedure of the radio frequency recognizing electronic label of the embodiment of the invention comprises:
The system of the assessment radio frequency recognizing electronic label of the embodiment of the invention is used for the read-write assessment, comprising:
Reader is used to produce the signal that comprises the instruction that is used to initiate continuous read/write operation;
Antenna is used for sending the signal that described reader produces to the radio frequency recognizing electronic label of different distance;
Register, be used to write down the corresponding read/write success ratio value of various distances between antenna and the radio frequency recognizing electronic label, also be used for record and obtain reliably read/write distance and read/write distance farthest farthest, described read/write distance farthest is the read/write success ratio greater than 0 antenna and the maximal value in the distance set between the radio frequency recognizing electronic label, and described reliable farthest read/write distance is that the read/write success ratio is greater than the maximal value in the antenna of preset value and the distance set between the radio frequency recognizing electronic label.
For above-mentioned treatment scheme, when concrete operations, first distance can be set be 0.5m, increase gradually then, as each increase 0.1m, until the read/write success ratio is 0, certainly, the selection of this stepping can be provided with according to different demands, as requires when high, can be set to 0.01m, its difference only is the difference of multiplicity.
＜attachment material attribute assessment 〉
In above-mentioned various assessments, the performance of radio frequency recognizing electronic label may change after being attached to certain material, assess, check Performance Evaluation, directional sensitivity assessment etc. as read, therefore, after label is attached to material, top said various appraisal procedures according to the embodiment of the invention can obtain the performance of the radio frequency recognizing electronic label under the different attachment material, and then select only attachment material.Illustrate as follows.
With radio frequency recognizing electronic label attached on a certain material, according to flow process shown in Figure 6, obtain radio frequency recognizing electronic label corresponding to this attachment material check success ratio, farthest check distance, reliably check data such as distance farthest.Conversion materials repetitive stream journey more is up to obtaining the data of radio frequency recognizing electronic label corresponding to each interested material.
At last, it is far away and check the material of success ratio value than the stable data correspondence to check distance, is exactly the attachment material that label is supported.
Test for other performances also is so, no longer is elaborated at this.
＜assessment of cost 〉
For the radio-frequency recognition system of last scale, the cost determination of radio frequency recognizing electronic label the cost and the profit of total system, and under most of situation, the label cost is not that the increase along with quantity increases linearly.Therefore, the cost of label in conjunction with its various performance index, is weighed its cost performance again in the time of can representing different number of labels with a broken line graph.
By the assessment of above-mentioned different performance, can finish assessment to a radio frequency recognizing electronic label, the radio frequency recognizing electronic label information that is directed to application has just all been determined.Actual RFID application system generally can be paid close attention to certain a part of tag performance and technical indicator, by assessment result, can screen various label product well, finally selects the label of the most suitable application.
Simultaneously, should be appreciated that above-mentioned all is the assessment of carrying out respectively at different performance, certainly, assessment when also can carry out multiple performance to label in conjunction with two or more flow processs wherein and since its processing procedure to assess similarly substantially respectively, be not described in detail at this.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a method of assessing radio frequency recognizing electronic label is characterized in that, comprising:
Steps A 1, reader produces the signal that comprises first instruction in first working frequency points and first output power, and described first output power is the peak power output of reader;
Steps A 2, the signal of described first instruction sends to antenna with comprising of the current generation of described reader;
Steps A 3, the radio frequency recognizing electronic label of described sky alignment and described antenna spacing preset distance sends the signal that receives;
Steps A 4, judge whether described radio frequency recognizing electronic label can normal response described first instruct, if, described reader produces the signal that comprises described instruction in first working frequency points and second output power that is lower than the described first output power predetermined value, return steps A 2, otherwise enter steps A 5;
Steps A 5 is noted down the lowest power that normally starts at first frequency for described radio frequency recognizing electronic label with the output power of described reader last time.
2. method according to claim 1 is characterized in that, also comprises:
Steps A 6, repeating said steps A1 obtains the normal lowest power that starts of described radio frequency recognizing electronic label each frequency in the frequency range that can work to steps A 5.
3. method according to claim 2, it is characterized in that, the value of first working frequency points in the described steps A of carrying out 1 is the minimum value of described radio frequency recognizing electronic label in the frequency range that can work for the first time, and the value of first working frequency points in the described steps A of carrying out after carrying out for the first time 1 increases the value that obtains after the default step-length for the value of the first last working frequency points.
4. according to claim 1 or 2 or 3 described methods, it is characterized in that, also comprise:
Step B1, reader produces the signal that comprises second instruction, and described second instruction is for meeting the instruction of first agreement;
Step B2, the signal of described second instruction sends to antenna with comprising of the current generation of described reader;
Step B3, the signal that alignment radio frequency recognizing electronic label emission in described day receives;
Step B4, when described reader did not report an error and passes through checking, corresponding described first agreement and second of preserving was instructed.
5. method according to claim 4 is characterized in that, also comprises:
Step B5, repeating said steps B1 be to step B4, preserves to belong to that the described reader of making of described first agreement does not report an error and all instructions during by checking.
6. method according to claim 5 is characterized in that, also comprises:
Step B6, repeating said steps B1 be to step B5, preserves to make described reader not report an error under each agreement and all instructions during by checking.
7. a system that assesses radio frequency recognizing electronic label is characterized in that, comprising:
Reader is used to produce the signal that comprises first instruction;
Coupling mechanism is used to receive the described signal that comprises first instruction, and described signal is divided into first signal and secondary signal;
Antenna is connected with described coupling mechanism, launches after being used to obtain described first signal;
Measuring instrument is connected with described coupling mechanism, is used for obtaining current frequency of operation of described reader and emissive power according to described secondary signal;
The response determining device is used to judge whether described radio frequency recognizing electronic label is normal response to the response of described first instruction, obtains a judged result;
Controller is used for when described judged result indication response is normal response, and the current transmit power of controlling described reader reduces predetermined amplitude, is not normal response until described judged result indication response;
Register is used for when described judged result indication response is not normal response corresponding frequency of operation and the emissive power that once measures before the described power measurement instruments of preserving.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810118623A CN101655899A (en) | 2008-08-20 | 2008-08-20 | Method and system for evaluating radio frequency identification electronic label |
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| CN200810118623A CN101655899A (en) | 2008-08-20 | 2008-08-20 | Method and system for evaluating radio frequency identification electronic label |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890765A (en) * | 2011-07-20 | 2013-01-23 | 富士通株式会社 | Method and device for locating radio frequency identification tags |
| CN103116734A (en) * | 2013-03-19 | 2013-05-22 | 天津工业大学 | Anti-collision method of RFID (Radio Frequency Identification) system based on power control |
| CN108932781A (en) * | 2018-07-26 | 2018-12-04 | 天津中兴智联科技有限公司 | A kind of RSSI Self-study of threshold method in entrance guard management scene |
| CN109871719A (en) * | 2019-03-11 | 2019-06-11 | 深圳鑫洲林科技有限公司 | A kind of method and system improving multi-tag reading rate |
| CN112580377A (en) * | 2020-12-21 | 2021-03-30 | 江门市得实计算机外部设备有限公司 | Radio frequency power calibration method, device, equipment and storage medium |
| CN113283258A (en) * | 2021-06-02 | 2021-08-20 | 上海宜链物联网有限公司 | Method and reading device capable of automatically searching optimal working frequency point of electronic tag |
| CN117081628A (en) * | 2023-08-31 | 2023-11-17 | 厦门汉印电子技术有限公司 | Frequency point determining method and device, printing equipment and storage medium |
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2008
- 2008-08-20 CN CN200810118623A patent/CN101655899A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890765A (en) * | 2011-07-20 | 2013-01-23 | 富士通株式会社 | Method and device for locating radio frequency identification tags |
| CN102890765B (en) * | 2011-07-20 | 2015-10-14 | 富士通株式会社 | RFID tag localization method and device |
| CN103116734A (en) * | 2013-03-19 | 2013-05-22 | 天津工业大学 | Anti-collision method of RFID (Radio Frequency Identification) system based on power control |
| CN108932781A (en) * | 2018-07-26 | 2018-12-04 | 天津中兴智联科技有限公司 | A kind of RSSI Self-study of threshold method in entrance guard management scene |
| CN108932781B (en) * | 2018-07-26 | 2021-06-11 | 天津中兴智联科技有限公司 | RSSI threshold value self-learning method in access control management scene |
| CN109871719A (en) * | 2019-03-11 | 2019-06-11 | 深圳鑫洲林科技有限公司 | A kind of method and system improving multi-tag reading rate |
| CN112580377A (en) * | 2020-12-21 | 2021-03-30 | 江门市得实计算机外部设备有限公司 | Radio frequency power calibration method, device, equipment and storage medium |
| CN113283258A (en) * | 2021-06-02 | 2021-08-20 | 上海宜链物联网有限公司 | Method and reading device capable of automatically searching optimal working frequency point of electronic tag |
| CN113283258B (en) * | 2021-06-02 | 2024-04-23 | 上海宜链物联网有限公司 | Method capable of automatically searching optimal working frequency point of electronic tag and reading device |
| CN117081628A (en) * | 2023-08-31 | 2023-11-17 | 厦门汉印电子技术有限公司 | Frequency point determining method and device, printing equipment and storage medium |
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