CN109614832B - Card reading method and device of radio frequency identification reader and computer readable storage medium - Google Patents
Card reading method and device of radio frequency identification reader and computer readable storage medium Download PDFInfo
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- 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
- G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
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Abstract
The invention relates to the field of wireless radio frequency identification, and provides a method and a device for reading a card by a radio frequency identification reader and a computer readable storage medium, so as to improve the card reading identification rate of the reader. The method comprises the following steps: judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader; if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag; and if the tag read by the area pointed by the antenna is an invalid tag, filtering the invalid tag. The technical scheme provided by the invention improves the identification rate of the label on one hand and can also improve the card reading efficiency of the reader on the other hand.
Description
Technical Field
The invention belongs to the field of wireless radio frequency identification, and particularly relates to a card reading method and device of a radio frequency identification reader and a computer readable storage medium.
Background
Radio Frequency IDentification (RFID) technology is a new technology for automatic IDentification, and is widely applied to various fields such as warehouse logistics, indoor positioning, book management and the like by virtue of various advantages. The RFID utilizes a radio frequency mode to perform non-contact bidirectional communication to exchange data so as to achieve the aim of identification. However, when more than one RFID tag communicates with a reader (reader) at the same time, since the passive RFID system tags share one transmission channel, collision between the tags may cause the tags not to normally communicate with the reader. Therefore, how to improve the card reading efficiency of the reader is a general problem in the industry.
At present, the method for improving the card reading efficiency of the reader adopts an anti-collision algorithm, which specifically includes a space division multiplexing method, a frequency division multiplexing method, a time division multiplexing method, a code division multiplexing method and the like.
However, in practice, it is found that after the above anti-collision algorithm is optimized to a certain degree, in any case, the optimization still causes some situations that the tag cannot be activated and/or identified, and the reading recognition rate of the reader is reduced.
Disclosure of Invention
The invention provides a card reading method and device of a radio frequency identification reader and a computer readable storage medium, which are used for improving the card reading identification rate of the reader.
The invention provides a card reading method of a radio frequency identification reader in a first aspect, which comprises the following steps:
judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader;
if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag;
and if the tag read by the area pointed by the antenna is an invalid tag, filtering the invalid tag.
With reference to the first aspect of the present invention, in a first implementation manner of the first aspect, the determining, by dividing an effective card reading area of a reader and adjusting an antenna of the reader, whether a tag read by an area indicated by the antenna is an effective tag includes:
dividing an effective card reading area of the reader into a plurality of small areas;
estimating a signal intensity parameter value of a tag T in a small area pointed by an antenna by adjusting the antenna of the reader;
and if the absolute difference value between the signal intensity parameter value of the tag T read by the small block area pointed by the antenna and the effective signal intensity of the tag of the small block area pointed by the antenna is not greater than a preset threshold value, determining that the tag T of the small block area pointed by the antenna is an effective tag.
With reference to the first implementation manner of the first aspect of the present invention, in a second implementation manner of the first aspect, the estimating, by adjusting an antenna of the reader, a signal strength parameter value of a tag T in a small area to which the antenna points includes:
adjusting the beam width of an antenna of the reader to enable the beam of the antenna to cover the small block area;
placing a plurality of labels in the range of the small area;
and reading a plurality of labels in the range of the small block area, and estimating the signal intensity parameter value of the label T of the beam coverage small block area according to the signal intensity value returned by the labels.
With reference to the first aspect of the present invention, the first implementation manner of the first aspect, or the second implementation manner of the first aspect, in a third implementation manner of the first aspect, the method further includes:
and setting the frequency hopping time of the reader when each frequency point reads the label.
A second aspect of the present invention provides a reader device for a radio frequency identification reader, the device comprising:
the effective tag judging module is used for judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader;
the tag storage module is used for storing and performing subsequent processing on the effective tag if the tag read by the area indicated by the antenna is the effective tag;
and the tag filtering module is used for filtering the invalid tag if the tag read by the area indicated by the antenna is the invalid tag.
With reference to the second aspect of the present invention, in a first implementation manner of the second aspect, the valid tag determining module includes:
the area dividing unit is used for dividing an effective card reading area of the reader into a plurality of small areas;
the estimation unit is used for estimating the signal strength parameter value of the tag T in the small block area pointed by the antenna by adjusting the antenna of the reader;
a determining unit, configured to determine that the tag T in the small block area indicated by the antenna is an effective tag if an absolute difference between a signal strength parameter value of the tag T read by the small block area indicated by the antenna and an effective signal strength of the tag in the small block area indicated by the antenna is not greater than a preset threshold.
With reference to the first implementation manner of the second aspect of the invention, in a second implementation manner of the second aspect, the estimation unit comprises:
a beam adjusting unit, configured to adjust a beam width of an antenna of the reader, so that the beam of the antenna covers the small block area;
the label placing unit is used for placing a plurality of labels in the range of the small block area;
and the parameter estimation unit is used for reading a plurality of labels in the range of the small block area and estimating the signal intensity parameter value of the label T of the beam coverage small block area according to the signal intensity value returned by the label.
With reference to the second aspect of the present invention, the first embodiment of the second aspect, or the second embodiment of the second aspect, in a third embodiment of the second aspect, the apparatus further comprises:
and the setting module is used for setting the frequency hopping time of the reader when the tag is read at each frequency point.
A third aspect of the invention provides a computing device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method when executing the computer program:
judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader;
if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag;
and if the tag read by the area pointed by the antenna is an invalid tag, filtering the invalid tag.
With reference to the third aspect of the present invention, in a first implementation manner of the third aspect, the determining whether a tag in an area pointed by an antenna is a valid tag by dividing an effective card reading area of the reader and adjusting the antenna of the reader includes:
dividing an effective card reading area of the reader into a plurality of small areas;
estimating a signal intensity parameter value of a tag T in a small area pointed by an antenna by adjusting the antenna of the reader;
and if the absolute difference value between the signal intensity parameter value of the tag T read by the small block area pointed by the antenna and the effective signal intensity of the tag of the small block area pointed by the antenna is not greater than a preset threshold value, determining that the tag T of the small block area pointed by the antenna is an effective tag.
With reference to the first implementation manner of the third aspect of the present invention, in a second implementation manner of the third aspect, the estimating, by adjusting an antenna of the reader, a signal strength parameter value of a tag T in a small area to which the antenna points includes:
adjusting the beam width of an antenna of the reader to enable the beam of the antenna to cover the small block area;
placing a plurality of labels in the range of the small area;
and reading a plurality of labels in the range of the small block area, and estimating the signal intensity parameter value of the label T of the beam coverage small block area according to the signal intensity value returned by the labels.
With reference to the third aspect of the present invention, the first implementation manner of the third aspect, or the second implementation manner of the third aspect, in a third implementation manner of the third aspect, the method further includes:
and setting the frequency hopping time of the reader when each frequency point reads the label.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, in which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the method:
judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader;
if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag;
and if the tag read by the area pointed by the antenna is an invalid tag, filtering the invalid tag.
With reference to the fourth aspect of the present invention, in a first implementation manner of the fourth aspect, the determining whether the tag in the area indicated by the antenna is a valid tag by dividing a valid card reading area of the reader and adjusting the antenna of the reader includes:
dividing an effective card reading area of the reader into a plurality of small areas;
estimating a signal intensity parameter value of a tag T in a small area pointed by an antenna by adjusting the antenna of the reader;
and if the absolute difference value between the signal intensity parameter value of the tag T read by the small block area pointed by the antenna and the effective signal intensity of the tag of the small block area pointed by the antenna is not greater than a preset threshold value, determining that the tag T of the small block area pointed by the antenna is an effective tag.
With reference to the first implementation manner of the fourth aspect of the present invention, in a second implementation manner of the fourth aspect, the estimating, by adjusting an antenna of the reader, a signal strength parameter value of a tag T in a small area to which the antenna points includes:
adjusting the beam width of an antenna of the reader to enable the beam of the antenna to cover the small block area;
placing a plurality of labels in the range of the small area;
and reading a plurality of labels in the range of the small block area, and estimating the signal intensity parameter value of the label T of the beam coverage small block area according to the signal intensity value returned by the labels.
With reference to the fourth aspect of the present invention, the first implementation manner of the fourth aspect, or the second implementation manner of the fourth aspect, in a third implementation manner of the fourth aspect, the method further includes:
and setting the frequency hopping time of the reader when each frequency point reads the label.
According to the technical scheme provided by the invention, before the tag is read, whether the tag in the area indicated by the antenna is an effective tag is judged, so that on one hand, the effective tag is read only when the tag in the area indicated by the antenna is judged to be the effective tag, and the tag identification rate is improved; on the other hand, filtering the tags judged to be invalid not only skips the invalid tags directly, but also improves the tag identification rate, and also saves various resources (such as time and the like) for reading the invalid tags, which is also an important way for improving the card reading efficiency of the reader.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating an implementation of a card reading method of a radio frequency identification reader according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention for dividing a valid card reading area into a plurality of small areas;
FIG. 3 is a schematic structural diagram of a card reading device of a radio frequency identification reader according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a card reading device of a radio frequency identification reader according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a card reading device of a radio frequency identification reader according to another embodiment of the present invention;
FIG. 6-a is a schematic structural diagram of a card reading device of a radio frequency identification reader according to another embodiment of the present invention;
FIG. 6-b is a schematic structural diagram of a card reading device of a radio frequency identification reader according to another embodiment of the present invention;
FIG. 6-c is a schematic structural diagram of a card reading device of a radio frequency identification reader according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart illustrating an implementation of a card reading method for a radio frequency identification reader according to an embodiment of the present invention, where an execution main body may be a tag reader (reader) in the RFID technology. The method illustrated in fig. 1 mainly comprises the following steps S101 to S103, which are explained in detail below:
s101, judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader.
In the embodiment of the present invention, the reader is a tag reader (reader) in an RFID technology, and mainly includes a Microprocessor (Microprocessor), an RFID radio frequency module, a phased array antenna, and other peripherals. The effective reading area of the reader is a space area divided according to the area range where the actual tag is located, and the antenna can be a phased array antenna of the reader. As an embodiment of the present invention, by dividing the effective card reading area of the reader and adjusting the antenna of the reader, determining whether the tag read by the area indicated by the antenna is an effective tag can be implemented through the following steps S1011 to S1013:
s1011, the effective card reading area of the reader is divided into a plurality of small areas.
In the embodiment of the present invention, the effective card reading area is subdivided into more small areas, considering that if the effective card reading area is too large, the effective card reading area contains more tags, wherein there may be tags which are not effective. In the embodiment of the present invention, any one of the plurality of small blocks into which the effective card reading area is divided may be represented by a space vector (Xi, Yi, Zi), as shown in fig. 2, and the black shaded area represents the small blocks divided from the effective card reading area.
S1012, by adjusting the antenna of the reader, the signal strength parameter value of the tag T read by the small block area pointed by the antenna is estimated.
In the RFID field, since the Signal Strength parameter value of the tag is closely related to parameters such as the orientation of the antenna of the reader and the beam width, the Signal Strength parameter value of the tag T read in the small area indicated by the antenna, for example, the Received Signal Strength Indication (RSSI) value, can be estimated by adjusting the antenna of the reader. Specifically, by adjusting the antenna of the reader, the signal strength parameter value of the tag T read by the small area indicated by the estimated antenna may be: adjusting the beam width of an antenna of a reader, enabling the beam of the antenna to cover a small block area A, placing a plurality of labels in the range of the small block area A, reading the plurality of labels in the range of the small block area A, and estimating the signal intensity parameter value of a label T of the small block area A covered by the beam of the antenna according to the signal intensity values returned by the labels. For example, since the RSSI value of the tag is closely related to the distance between the tag and the reader antenna, the beam direction, the transmission power, and the like, after the beam of the antenna covers a certain small block area a, the RSSI value of the tag T in the beam coverage small block area a can be calculated according to the distance between the tag and the reader antenna, the beam direction, and the transmission power within the range of the small block area a covered by the beam of the antenna.
S1013, if an absolute difference between a signal strength parameter value of the tag T in the small block area pointed by the antenna and the effective signal strength of the tag in the small block area pointed by the antenna is not greater than a preset threshold, determining that the tag T in the small block area pointed by the antenna is an effective tag.
In the embodiment of the present invention, the effective signal strength of the tag in the small area pointed by the antenna is a preset value, or a value calculated in advance, for example, an average value of the calculated effective signal strengths of the tags in all the small areas, where the value corresponds to an effective tag in the small area pointed by the reader. In consideration of errors caused by various reasons, in the embodiment of the present invention, if an absolute difference between a signal strength parameter value of a tag T in a small block area pointed by an antenna and an effective signal strength of a tag in the small block area pointed by the antenna is not greater than a preset threshold, the tag T in the small block area pointed by the antenna is determined to be an effective tag. Taking the RSSI measurement as an example of the signal strength parameter value or the effective signal strength, let the RSSI of the tag in the small block area a pointed by the antenna be R0RSSI of tag T in the small area indicated by the antenna is RAThe predetermined threshold is phi, if RA-R0And if the | is less than or equal to phi, determining the label T in the small block area pointed by the antenna as an effective label.
And S102, if the tag of the area pointed by the antenna is an effective tag, storing and carrying out subsequent processing on the effective tag.
In the embodiment of the invention, only the effective tags are stored and subsequently processed, so that the identification rate of the tags is greatly improved.
And S103, if the label of the area pointed by the antenna is an invalid label, filtering the invalid label.
In the embodiment of the present invention, the invalid tag filtering may be that the reader does not directly read the invalid tag, or even if the reader reads the invalid tag, no further processing is performed.
To improve the tag identification rate and further improveThe card reading efficiency of the reader, as an embodiment of the present invention, can set the frequency hopping time of the reader when reading the tag at each frequency point. The frequency point hopping time is a time at which the frequency point is used in a system for reading a tag using a frequency hopping technique, and is, for example, at time t1Internal use frequency point f1Then f is1Has a frequency hopping time of t1At time t2Internal use frequency point f2Then f is2Has a frequency hopping time of t2And so on. In the embodiment of the present invention, similar to the prior art, the reader may read the tag in a frequency hopping manner, however, when the tag is read in the frequency hopping manner in the prior art, after a plurality of frequency points are set, the reader continuously and sequentially uses a certain frequency point to read the tag, and the time for reading the tag at each frequency point is equal, which may cause a problem that: when the tag cannot be read at a certain frequency point or the efficiency of reading the tag is poor, the frequency point still occupies more time for reading the tag, so that the overall rate of reading the tag by the reader is reduced. Different from the prior art, the frequency hopping time of the reader when each frequency point reads the label can be set, and the method specifically comprises the following steps: counting the card reading rate of the reader at each frequency point, and dividing the card reading rates into a plurality of different grades, wherein the higher the rate is, the higher the grade is; the frequency hopping time is set for each frequency point according to the principle that the higher the grade is, the longer the frequency hopping time is when the label is read at the frequency point, so that the probability or frequency of reading the label at the frequency point with high label reading speed is higher than the probability or frequency of reading the label at the frequency point with low label reading speed when the label is read in a subsequent frequency hopping mode, and the efficiency of reading the label by the reader is integrally improved.
As can be seen from the above-mentioned card reading method of the rfid reader illustrated in fig. 1, before reading the tag, it is determined whether the tag in the area indicated by the antenna is an effective tag, so on one hand, when the tag in the area indicated by the antenna is determined to be an effective tag, the reading of the effective tag is started, and the tag identification rate is improved; on the other hand, filtering the tags judged to be invalid not only skips the invalid tags directly, but also improves the tag identification rate, and also saves various resources (such as time and the like) for reading the invalid tags, which is also an important way for improving the card reading efficiency of the reader.
Fig. 3 is a schematic diagram of a card reading device of an rfid reader according to an embodiment of the present invention. The device illustrated in fig. 3 may be a tag reader in RFID technology, and for convenience of description, only the parts relevant to the present invention are shown. The rfid reader reading apparatus illustrated in fig. 3 mainly includes an effective tag determination module 301, a tag reading module 302, and a tag filtering module 303, which are described in detail as follows:
the effective tag judging module 301 is configured to judge whether a tag read by an area indicated by an antenna is an effective tag by dividing an effective card reading area of the reader and adjusting the antenna of the reader;
a tag reading module 302, configured to store and perform subsequent processing on an effective tag if the tag read by the area indicated by the antenna is the effective tag;
the tag filtering module 303 is configured to filter invalid tags if the tags read by the area indicated by the antenna are invalid tags.
It should be noted that, since the apparatus provided in the embodiment of the present invention is based on the same concept as the method embodiment of the present invention, the technical effect brought by the apparatus is the same as the method embodiment of the present invention, and specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
The valid tag determining module 301 illustrated in fig. 3 may include an area dividing unit 401, an estimating unit 402, and a determining unit 403, such as the card reading apparatus of the rfid reader illustrated in fig. 4, where:
the area dividing unit 401 is configured to divide an effective card reading area of the reader into a plurality of small areas;
an estimating unit 402, configured to estimate a signal strength parameter value of a tag T read by a small area indicated by an antenna of a reader by adjusting the antenna;
a determining unit 403, configured to determine that the tag T in the small block area indicated by the antenna is a valid tag if an absolute difference between a signal strength parameter value of the tag T read by the small block area indicated by the antenna and an effective signal strength of the tag in the small block area indicated by the antenna is not greater than a preset threshold.
The evaluation unit 402 illustrated in fig. 4 may comprise a beam adjustment unit 501, a tag placement unit 502 and a parameter evaluation unit 503, such as the rfid reader card reading device illustrated in fig. 5, wherein:
a beam adjusting unit 501, configured to adjust a beam width of an antenna of a reader, so that the beam of the antenna covers a small area;
a label placing unit 502 for placing a plurality of labels within the range of the small region;
and a parameter estimation unit 503, configured to read a plurality of tags in the range of the small block area, and estimate a signal strength parameter value of the tag T whose beam covers the small block area according to the signal strength value returned by the tag.
The rfid reader reading device of any of fig. 3 to 5 may further include a setting module 601, such as the rfid reader reading device of any of fig. 6-a to 6-c. The setting module 601 is used for setting the frequency hopping time of the reader when the tag is read at each frequency point, specifically, the setting module 601 counts the card reading rates of the reader at each frequency point, and divides the card reading rates into a plurality of different grades, wherein the higher the rate is, the higher the grade is; and setting the frequency hopping time for each frequency point according to the principle that the higher the grade is, the longer the frequency hopping time is when the label is read at the frequency point.
Fig. 7 is a schematic structural diagram of a computing device according to an embodiment of the present invention. As shown in fig. 7, the computing device 7 of this embodiment may be a tag reader in RFID technology, and the computing device 7 mainly includes: a processor 70, a memory 71 and a computer program 72, such as a program for a radio frequency identification reader reading method, stored in the memory 71 and executable on the processor 70. The processor 70, when executing the computer program 72, implements the steps in the rfid reader card reading method embodiments described above, such as the steps S101 to S103 shown in fig. 1. Alternatively, the processor 70, when executing the computer program 72, implements the functions of the modules/units in the above-described device embodiments, such as the functions of the valid tag determination module 301, the tag reading module 302, and the tag filtering module 303 shown in fig. 3.
Illustratively, the computer program 72 for the rfid reader reading method mainly includes: judging whether the tag read by the area indicated by the antenna is an effective tag or not by dividing the effective card reading area of the reader and adjusting the antenna of the reader; if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag; and if the tags in the area pointed by the antenna are invalid tags, filtering the invalid tags. The computer program 72 may be divided into one or more modules/units, which are stored in the memory 71 and executed by the processor 70 to accomplish the present invention. One or more modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of computer program 72 in computing device 7. For example, the computer program 72 may be divided into functions of the valid tag determination module 301, the tag reading module 302, and the tag filtering module 303 (modules in the virtual device), and the specific functions of each module are as follows: the effective tag judging module 301 is configured to judge whether a tag read by an area indicated by an antenna is an effective tag by dividing an effective card reading area of the reader and adjusting the antenna of the reader; a tag reading module 302, configured to store and perform subsequent processing on an effective tag if the tag read by the area indicated by the antenna is the effective tag; the tag filtering module 303 is configured to filter invalid tags if the tags read by the area indicated by the antenna are invalid tags.
The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided by the present invention, it should be understood that the disclosed apparatus/computing device and method may be implemented in other ways. For example, the above-described apparatus/computing device embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the method of the embodiments of the present invention may also be completed by instructing related hardware through a computer program, where the computer program of the method for reading a card by using a radio frequency identification reader may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps in the embodiments of the methods may be realized, that is, whether a tag read by an area indicated by an antenna is an effective tag is determined by dividing an effective card reading area of the reader and adjusting the antenna of the reader; if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag; and if the tags in the area pointed by the antenna are invalid tags, filtering the invalid tags. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals. The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. A method for reading a card by a radio frequency identification reader, the method comprising:
dividing an effective card reading area of a reader into a plurality of small areas;
adjusting the beam width of an antenna of the reader to enable the beam of the antenna to cover the small block area;
placing a plurality of labels in the range of the small area;
reading a plurality of labels in the range of the small block area, and estimating a signal intensity parameter value of a label T of the small block area covered by the wave beam according to a signal intensity value returned by the labels;
if the absolute difference value between the signal intensity parameter value of the tag T read by the small block area pointed by the antenna and the effective signal intensity of the tag of the small block area pointed by the antenna is not greater than a preset threshold value, determining that the tag T of the small block area pointed by the antenna is an effective tag;
if the tag read by the area indicated by the antenna is an effective tag, storing and subsequently processing the effective tag;
and if the tag read by the area pointed by the antenna is an invalid tag, filtering the invalid tag.
2. The method for reading a card by a radio frequency identification reader according to claim 1, the method further comprising:
and setting the frequency hopping time of the reader when each frequency point reads the label.
3. A radio frequency identification reader-reading apparatus, the apparatus comprising:
the effective label judging module comprises an area dividing unit, an estimating unit and a determining unit;
the area dividing unit is used for dividing an effective card reading area of the reader into a plurality of small areas;
the estimation unit comprises a beam adjusting unit, a label placing unit and a parameter estimation unit;
the beam adjusting unit is configured to adjust a beam width of an antenna of the reader, so that the beam of the antenna covers the small block area;
the label placing unit is used for placing a plurality of labels in the range of the small area;
the parameter estimation unit is used for reading a plurality of labels in the range of the small block area and estimating the signal intensity parameter value of the label T of the small block area covered by the beam according to the signal intensity value returned by the label;
the determining unit is configured to determine that the tag T in the small block area indicated by the antenna is an effective tag if an absolute difference between a signal strength parameter value of the tag T read in the small block area indicated by the antenna and an effective signal strength of the tag in the small block area indicated by the antenna is not greater than a preset threshold;
the tag storage module is used for storing and performing subsequent processing on the effective tag if the tag read by the area indicated by the antenna is the effective tag;
and the tag filtering module is used for filtering the invalid tag if the tag read by the area indicated by the antenna is the invalid tag.
4. The radio frequency identification reader-reading device of claim 3, wherein the device further comprises:
and the setting module is used for setting the frequency hopping time of the reader when the tag is read at each frequency point.
5. A computing device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 2 when executing the computer program.
6. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 2.
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| CN201811382908.8A CN109614832B (en) | 2018-11-20 | 2018-11-20 | Card reading method and device of radio frequency identification reader and computer readable storage medium |
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| CN113408310A (en) * | 2020-03-17 | 2021-09-17 | 菜鸟智能物流控股有限公司 | Data processing method and device, electronic equipment and computer readable storage medium |
| CN112288060A (en) * | 2020-11-09 | 2021-01-29 | 北京沃东天骏信息技术有限公司 | Method and apparatus for identifying a tag |
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