CN110458257B - Label checking method and device based on RFID system - Google Patents
Label checking method and device based on RFID system Download PDFInfo
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- CN110458257B CN110458257B CN201910630463.9A CN201910630463A CN110458257B CN 110458257 B CN110458257 B CN 110458257B CN 201910630463 A CN201910630463 A CN 201910630463A CN 110458257 B CN110458257 B CN 110458257B
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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Abstract
The invention discloses a method and a device for checking labels based on an RFID system, wherein the method comprises the following steps: after detecting the checking instruction, checking the labels through the at least two external antennas according to a checking rule; generating a current checking result based on checking information of the checked tags, wherein the checking information of each tag comprises a tag identification, an antenna identification, frequency, power, an RSSI (received signal strength indicator) value and checking time; determining a suspected missing label based on the label identification included in the current checking result and the label identification included in the previous checking result; obtaining selected checking information corresponding to the suspected missing label identification from the historical checking result and the current checking result; and checking the labels again through the external antenna corresponding to the antenna identification included in the selected checking information based on the selected checking information, and determining whether the labels corresponding to the suspected label identification is missing or not according to the checking result again. The scheme can avoid the leakage of the label as much as possible, and greatly improves the accuracy of label checking.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for checking a tag based on a Radio Frequency Identification (RFID) system.
Background
RFID is a communication technology for identifying a specific object and reading and writing related data by radio signals. RFID is a non-contact automatic identification technology that uses the radio frequency of electromagnetic waves for radio communication to automatically identify individuals without the need for mechanical or optical contact between the identification system and a specific target.
As shown in fig. 1, the RFID system is composed of three important components, namely, a tag, a reader, and an external antenna. The tag consists of a coupling element and a chip, contains an internal antenna and is used for communicating with an external antenna; the reader is used for reading the information of the label; the external antenna is used for transmitting radio frequency signals between the tag and the reader. The basic working principle is as follows: the reader sends a radio frequency signal with a certain frequency through the external antenna, and when the tag enters a working area of the external antenna, induction current is generated, so that the obtained energy is activated; the tag carries information such as self codes in radio frequency signals and sends the information out through a built-in antenna; the external antenna receives a radio frequency signal sent by the label and then transmits the radio frequency signal to the reader; the reader demodulates and decodes the received radio frequency signal and then sends the radio frequency signal to the server for relevant processing.
At present, the application range of the RFID system is very wide, for example, in an unmanned intelligent retail container, an unmanned intelligent supermarket, a warehouse in a shopping mall, a warehouse in a hospital, a book supermarket, etc., no matter which application scenario is, the tags in the RFID system need to be checked, and the missing tags are determined by comparing the current checking result with the previous checking result, so as to determine that the articles corresponding to the tags are taken away. Due to factors such as the environment of an application scene of the RFID system, article placement, the sensitivity of the label and the like, the label leakage can occur, and the label checking accuracy is greatly reduced.
Disclosure of Invention
The embodiment of the invention provides a label checking method and device based on an RFID system, which are used for solving the problems that in the prior art, the label is missed and the accuracy of label checking is greatly reduced.
According to an embodiment of the present invention, there is provided a tag inventory method based on an RFID system, which is applied to a reader included in the RFID system, wherein the RFID system further includes at least two external antennas and at least two tags, and the method includes:
after detecting the checking instruction, checking the labels through the at least two external antennas according to a checking rule;
generating a current checking result based on checking information of the checked tags, wherein the checking information of each tag comprises a tag identification, an antenna identification, frequency, power, a received signal indication strength (RSSI) value and checking time;
determining a suspected missing label based on the label identification included in the current checking result and the label identification included in the previous checking result;
obtaining selected checking information corresponding to the suspected missing label identification from a historical checking result and the current checking result;
and re-checking the labels based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking information, and determining whether the labels corresponding to the suspected missing label identifiers are missing according to the re-checking result.
Specifically, generating the current counting result based on the counting information of the counted tag specifically includes:
recording inventory information of each label which is inventoried by the at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label behind the counting time recorded in the initial counting result to obtain the current counting result.
Specifically, determining a suspected missing tag identifier based on the tag identifier included in the current inventory result and the tag identifier included in the previous inventory result includes:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current checking result and the label identification which is included in the previous checking result to obtain the suspected missing label identification.
Specifically, the obtaining of the selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result includes:
and acquiring optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and latest inventory information corresponding to the suspected missing label identification from historical inventory results to obtain selected inventory information.
Specifically, re-checking the tag based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking information, and determining whether the tag corresponding to the suspected missing tag identifier is missing according to a re-checking result, specifically includes:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the tag through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the tag corresponding to the suspected missing tag identification is missing.
Optionally, the inventory rule includes a first set number of selected frequencies corresponding to each of the at least two external antennas, and the method further includes:
after the frequency calibration instruction is detected, sequentially checking the tags through the at least two external antennas under the selected power and the second set number of frequencies;
counting the number of labels checked by the at least two external antennas under each frequency;
and determining the frequency, ranked before the first set number, of the number of the tags checked by each external antenna in the at least two external antennas as the selected frequency of the corresponding external antenna.
According to an embodiment of the present invention, there is also provided a tag checking device based on an RFID system, which is applied to a reader included in the RFID system, the RFID system further includes at least two external antennas and at least two tags, and the device includes:
the checking module is used for checking the labels through the at least two external antennas according to a checking rule after detecting a checking instruction;
the generating module is used for generating the current checking result based on the checking information of the checked tags, wherein the checking information of each tag comprises a tag identifier, an antenna identifier, frequency, power, a received signal indication strength RSSI value and checking time;
a first determining module, configured to determine a suspected missing tag identifier based on a tag identifier included in the current inventory result and a tag identifier included in a previous inventory result;
the acquisition module is used for acquiring selected inventory information corresponding to the suspected missing label identification from a historical inventory result and the current inventory result;
and a second determining module, configured to re-check the tag based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking information, and determine whether the tag corresponding to the suspected missing tag identifier is missing according to a re-checking result.
Specifically, the generating module is configured to generate the current inventory result based on the inventory information of the label that is inventoried, and specifically configured to:
recording inventory information of each label which is inventoried by the at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label, which is recorded in the initial counting result and is later in counting time, so as to obtain the current counting result.
Specifically, the first determining module is configured to determine a suspected missing tag identifier based on the tag identifier included in the current inventory result and the tag identifier included in the previous inventory result, and specifically configured to:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current checking result and the label identification which is included in the previous checking result to obtain the suspected missing label identification.
Specifically, the obtaining module is configured to obtain, from a historical inventory result and the current inventory result, the selected inventory information corresponding to the suspected missing tag identifier, and specifically is configured to:
and acquiring optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and latest inventory information corresponding to the suspected missing label identification from historical inventory results to obtain selected inventory information.
Specifically, the second determining module is configured to re-check the tag based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking information, and determine whether the tag corresponding to the suspected missing tag identifier is missing according to a re-checking result, and specifically configured to:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the tag through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing tag identification is not checked through an external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the tag corresponding to the suspected missing tag identification is missing.
Optionally, the checking rule includes a first set number of selected frequencies corresponding to each external antenna in the at least two external antennas, and the apparatus further includes a statistical module and a third determining module, where:
the checking module is further configured to sequentially check the tags at the selected power and the second set number of frequencies through the at least two external antennas after detecting the frequency calibration instruction;
the statistical module is used for counting the number of the labels checked by the at least two external antennas under each frequency;
the third determining module is configured to determine, as the selected frequency of the corresponding external antenna, a frequency at which the rank of the number of tags checked by each of the at least two external antennas is located before the first set number.
The invention has the following beneficial effects:
the embodiment of the invention provides a method and a device for checking labels based on an RFID system, wherein after a checking instruction is detected, the labels are checked through at least two external antennas according to a checking rule; generating a current checking result based on checking information of the checked tags, wherein the checking information of each tag comprises a tag identification, an antenna identification, frequency, power, a received signal indication strength RSSI value and checking time; determining a suspected missing label based on the label identification included in the current checking result and the label identification included in the previous checking result; obtaining selected checking information corresponding to the suspected missing label identification from a historical checking result and the current checking result; and checking a label based on the selected checking information through an external antenna corresponding to the antenna identifier included in the selected checking information, and determining whether the label corresponding to the suspected missing label identifier is missing according to a checking result. According to the scheme, after the labels are checked through at least two external antennas according to the checking rule, the missing labels cannot be directly determined, the suspected missing label identification is determined at first, then the selected checking information corresponding to the suspected missing label identification is further determined, the labels are checked again based on the determined selected checking information, whether the labels corresponding to the suspected missing label identification are missing or not is finally determined according to the checking result, the missing of the labels can be avoided as much as possible through at least two rounds of label checking, and the accuracy of label checking is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a prior art RFID system;
fig. 2 is a flowchart of a tag inventory method based on an RFID system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a tag inventory apparatus based on an RFID system in an embodiment of the present invention.
Detailed Description
Aiming at the problems of missing discs of labels and greatly reducing the accuracy rate of label checking in the prior art, the embodiment of the invention provides a label checking method based on an RFID system, which is applied to a reader included in the RFID system shown in fig. 1, wherein the RFID system further comprises at least two external antennas and at least two labels, the number of the external antennas and the number of the labels can be set according to actual needs, and the number of the external antennas and the number of the labels in fig. 1 are exemplarily represented. The flow of the method is shown in fig. 2, and the execution steps are as follows:
s21: and after detecting the checking instruction, checking the label through at least two external antennas according to a checking rule.
The checking instruction may be sent by the server, specifically may be sent after the checking period is detected to have expired, may be sent after the decrease of the article is detected, or may be sent after the addition of the article is detected, and may be sent in many cases according to different scenes of actual application, which is not described in detail herein.
The inventory rule can be set according to actual needs, for example, assuming that there are 8 external antennas, each external antenna has 5 selected powers and 4 frequencies, the reader sequentially issues an instruction to the external antennas to instruct the external antenna 0 to begin inventory at the 1 st frequency and the 1 st power, after receiving a radio frequency signal returned by the tag, the reader instructs the external antenna 0 to begin inventory at the 1 st frequency and the 2 nd power, after receiving the radio frequency signal returned by the tag, the reader instructs the external antenna 0 to begin inventory at the 1 st frequency and the 3 rd power, after receiving the radio frequency signal returned by the tag, the reader instructs the external antenna 0 to begin inventory at the 1 st frequency and the 4 th power, after receiving the radio frequency signal returned by the tag, the reader instructs the external antenna 1 to begin inventory at the 1 st frequency and the 1 st power, 8230, after receiving the radio frequency signal returned by the tag, the reader instructs the external antenna 7 to begin inventory at the 1 st frequency and the 4 th power, and when all the selected frequencies of the external antennas are completed, all the inventory processes of the selected frequencies are performed again.
S22: and generating the current checking result based on the checking information of the checked label.
The inventory information of each tag includes tag identification, antenna identification, frequency, power, received Signal Strength Indication (RSSI) value and inventory time.
S23: and determining the suspected missing label identification based on the label identification included in the current checking result and the label identification included in the previous checking result.
S24: and obtaining selected inventory information corresponding to the suspected missing label identification from the historical inventory result and the current inventory result.
The historical counting results are stored with the previous counting results, and the selected counting information can be obtained by determining that the suspected missing label identification corresponds to the historical counting result and the current counting result. The number of the historical count results may be set according to actual needs, and for example, the count results of the previous 8 times, the previous 10 times, the previous 5 times, and the like may be saved.
S25: and checking the labels again through the external antenna corresponding to the antenna identification included in the selected checking information based on the selected checking information, and determining whether the labels corresponding to the suspected label identification is missing or not according to the checking result again.
After determining whether the tag is lost, the subsequent process can be continued according to different application scenarios, for example, in an unmanned intelligent retail container, the tag is usually lost after a user buys goods, at this time, a bill can be generated according to the article information corresponding to the lost tag, and the user settles the bill according to the bill, thereby completing the purchasing process.
According to the scheme, after the labels are checked through at least two external antennas according to the checking rule, the missing labels cannot be directly determined, the suspected missing label identification is determined at first, then the selected checking information corresponding to the suspected missing label identification is further determined, the labels are checked again based on the determined selected checking information, whether the labels corresponding to the suspected missing label identification are missing or not is finally determined according to the checking result, the missing of the labels can be avoided as much as possible through at least two rounds of label checking, and the accuracy of label checking is greatly improved.
Specifically, the generating of the current inventory result based on the inventory information of the label in S22 includes:
recording inventory information of each label which is inventoried by at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label behind the counting time recorded in the initial counting result to obtain the current counting result.
Due to different checking rules, one external antenna may check the same tag at the same frequency and different power, and in order to ensure the accuracy and simplicity of the checking result, the repeated tag needs to be re-checked at this time, and the re-checking process may be performed on the repeated tag that appears later, that is, the repeated tag that appears later in the checking result is deleted, so that the checking result may be obtained.
Specifically, in the above S23, the determining of the suspected missing tag identifier based on the tag identifier included in the current inventory result and the tag identifier included in the previous inventory result specifically includes:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current counting result and the label identification which is included in the previous counting result to obtain the suspected missing label identification.
For the label identifiers not included in the current counting result but included in the previous counting result, the labels may be the labels which are already missing, and therefore, the labels can be defined as the suspected missing label identifiers.
Specifically, in the step S24, the obtaining of the selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result specifically includes:
and acquiring the optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and the latest inventory information corresponding to the suspected missing label identification from the historical inventory result to obtain the selected inventory information.
The selected inventory information may include, but is not limited to, the optimal inventory information and the latest inventory information, which may be obtained from the cached inventory results and then the inventory tag may be checked based on the inventory information. Of course, there are many other ways of determining the selected inventory information, and this will not be described here.
Specifically, the step S25 of re-inventorying the tag based on the selected inventory information through the external antenna corresponding to the antenna identifier included in the selected inventory information and determining whether the tag corresponding to the suspected missing tag identifier is missing according to the re-inventorying result specifically includes:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing label identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the label through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing label identification is not checked through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the label corresponding to the suspected missing label identification is missing.
The most probable missing tag is scanned under the most probable missing tag, and therefore, if the most probable missing tag is scanned under the inventory information, the most probable missing tag is not scanned under the most probable missing tag, and if the most probable missing tag is not scanned under the most probable missing tag, the most probable missing tag is not scanned under the inventory information, and therefore, the most probable missing tag is determined directly that the most probable missing tag is missed.
Optionally, the inventory rule includes a first set number of selected frequencies corresponding to each of the at least two external antennas, and the method further includes:
after the frequency calibration instruction is detected, sequentially checking the tags under the selected power and the second set number of frequencies through at least two external antennas;
counting the number of labels checked by at least two external antennas at each frequency;
and determining the frequency, the rank of the number of the tags counted by each external antenna in the at least two external antennas is positioned before the first set number, as the selected frequency of the corresponding external antenna.
Because factors such as external environment and the like change under different application scenarios, frequency calibration needs to be performed periodically, a frequency calibration period can be set, a frequency calibration instruction can be automatically sent when the frequency calibration period expires, and the frequency calibration period can be set according to actual needs, for example, the frequency calibration period can be set to be 24 hours, 48 hours, 29 hours and the like; frequency calibration instructions can also be initiated manually; other situations are also possible and will not be described one by one here. When a frequency calibration command is detected, frequency calibration may be performed to determine a selected frequency for each external antenna. Since the external antennas usually support a plurality of frequencies, sometimes several tens of frequencies, and when performing S21-S25, if these frequencies are all used for tag inventory, it takes a long time, so that several preferred frequencies of each external antenna can be determined to be used for tag inventory, and a preferred manner can determine a frequency ranking the number of tags inventorized by each of the at least two external antennas before the first set number as the selected frequency of the corresponding external antenna.
Based on the same inventive concept, an embodiment of the present invention provides a tag checking device based on an RFID system, where the structure of the device is shown in fig. 3, and the device includes:
the checking module 31 is configured to check the tags through at least two external antennas according to a checking rule after detecting the checking instruction;
a generating module 32, configured to generate a current inventory result based on inventory information of the counted tags, where the inventory information of each tag includes a tag identifier, an antenna identifier, frequency, power, a received signal strength RSSI value, and inventory time;
a first determining module 33, configured to determine a suspected missing tag identifier based on a tag identifier included in the current inventory result and a tag identifier included in a previous inventory result;
an obtaining module 34, configured to obtain selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result;
the second determining module 35 is configured to re-inventory the tag based on the selected inventory information through the external antenna corresponding to the antenna identifier included in the selected inventory information, and determine whether the tag corresponding to the suspected missing tag identifier is missing according to a re-inventory result.
According to the scheme, after the labels are checked through at least two external antennas according to the checking rule, the missing labels cannot be directly determined, the suspected missing label identification is determined at first, then the selected checking information corresponding to the suspected missing label identification is further determined, the labels are checked again based on the determined selected checking information, whether the labels corresponding to the suspected missing label identification are missing or not is finally determined according to the checking result, the missing of the labels can be avoided as much as possible through at least two rounds of label checking, and the accuracy of label checking is greatly improved.
Specifically, the generating module 32 is configured to generate the current inventory result based on the inventory information of the label that is inventoried, and specifically configured to:
recording inventory information of each label which is inventoried by at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label, which is recorded in the initial counting result and is later in counting time, to obtain the current counting result.
Specifically, the first determining module 33 is configured to determine the suspected missing tag identifier based on the tag identifier included in the current inventory result and the tag identifier included in the previous inventory result, and is specifically configured to:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current counting result and the label identification which is included in the previous counting result to obtain the suspected missing label identification.
Specifically, the obtaining module 34 is configured to obtain selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result, and specifically configured to:
and acquiring the optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and the latest inventory information corresponding to the similar missing label identification from the historical inventory result to obtain the selected inventory information.
Specifically, the second determining module 35 is configured to re-inventory the tag based on the selected inventory information through the external antenna corresponding to the antenna identifier included in the selected inventory information, and determine whether the tag corresponding to the suspected missing tag identifier is missing according to a re-inventory result, and specifically configured to:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing label identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the label through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the tag corresponding to the suspected missing tag identification is missing.
Optionally, the checking rule includes a first set number of selected frequencies corresponding to each of the at least two external antennas, and the apparatus further includes a statistical module and a third determining module, where:
the checking module is further used for sequentially checking the labels under the selected power and the second set number of frequencies through at least two external antennas after detecting the frequency calibration instruction;
the statistical module is used for counting the number of labels checked by at least two external antennas at each frequency;
and the third determining module is used for determining the frequency, the ranking of the number of the tags counted by each external antenna in the at least two external antennas is before the first set number, as the selected frequency of the corresponding external antenna.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While alternative embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (12)
1. A label checking method based on a Radio Frequency Identification (RFID) system is applied to a reader included in the RFID system, the RFID system also comprises at least two external antennas and at least two labels, and the method is characterized by comprising the following steps:
after detecting the checking instruction, checking the labels through the at least two external antennas according to a checking rule; the checking rule comprises a first set number of selected frequencies and selected powers corresponding to each external antenna in the at least two external antennas;
generating a current checking result based on checking information of the checked tags, wherein the checking information of each tag comprises a tag identification, an antenna identification, frequency, power, a received signal indication strength RSSI value and checking time;
determining a suspected missing label based on the label identification included in the current checking result and the label identification included in the previous checking result;
obtaining selected checking information corresponding to the suspected missing label identification from a historical checking result and the current checking result;
and re-checking the labels based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking information, and determining whether the labels corresponding to the suspected missing label identifiers are missing according to the re-checking result.
2. The method according to claim 1, wherein generating the current inventory result based on the inventory information of the inventoried label specifically comprises:
recording inventory information of each label which is inventoried by the at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label, which is recorded in the initial counting result and is later in counting time, so as to obtain the current counting result.
3. The method according to claim 1, wherein determining the suspected missing tag identifier based on the tag identifier included in the current inventory result and the tag identifier included in the previous inventory result includes:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current checking result and the label identification which is included in the previous checking result to obtain the suspected missing label identification.
4. The method according to claim 1, wherein obtaining the selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result specifically includes:
and acquiring the optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and the latest inventory information corresponding to the suspected missing label identification from the historical inventory result to obtain the selected inventory information.
5. The method as claimed in claim 4, wherein the tag is checked again based on the selected inventory information through an external antenna corresponding to the antenna identifier included in the selected inventory information, and whether the tag corresponding to the suspected missing tag identifier is missing is determined according to the result of the check again, specifically including:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the tag through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the tag corresponding to the suspected missing tag identification is missing.
6. The method of any of claims 1-5, further comprising:
after the frequency calibration instruction is detected, sequentially checking the tags under the selected power and the second set number of frequencies through the at least two external antennas;
counting the number of labels checked by the at least two external antennas under each frequency;
and determining the frequency, ranked before the first set number, of the number of the tags checked by each external antenna in the at least two external antennas as the selected frequency of the corresponding external antenna.
7. A tag checking device based on an RFID system, which is applied to a reader included in the RFID system, wherein the RFID system further includes at least two external antennas and at least two tags, and the device includes:
the checking module is used for checking the labels through the at least two external antennas according to a checking rule after detecting a checking instruction; the checking rule comprises a first set number of selected frequencies and selected powers corresponding to each external antenna in the at least two external antennas;
the generating module is used for generating the counting result based on the counting information of the counted tags, wherein the counting information of each tag comprises a tag identification, an antenna identification, frequency, power, a received signal indication strength (RSSI) value and counting time;
a first determining module, configured to determine a suspected missing tag identifier based on a tag identifier included in the current inventory result and a tag identifier included in a previous inventory result;
the acquisition module is used for acquiring selected inventory information corresponding to the suspected missing label identification from a historical inventory result and the current inventory result;
and a second determining module, configured to re-inventory the tag based on the selected inventory information through an external antenna corresponding to the antenna identifier included in the selected inventory information, and determine whether the tag corresponding to the suspected missing tag identifier is missing according to a re-inventory result.
8. The apparatus according to claim 7, wherein the generating module is configured to generate the current inventory result based on the inventory information of the label that is inventoried, and specifically configured to:
recording the inventory information of each label inventoried by the at least two external antennas to obtain an initial inventory result;
and performing re-processing on the counting information of the repeated label, which is recorded in the initial counting result and is later in counting time, so as to obtain the current counting result.
9. The apparatus according to claim 7, wherein the first determining module is configured to determine a suspected missing tag identifier based on a tag identifier included in the current inventory result and a tag identifier included in a previous inventory result, and is specifically configured to:
comparing the label identification included in the current checking result with the label identification included in the previous checking result;
and finding out the label identification which is not included in the current counting result and the label identification which is included in the previous counting result to obtain the suspected missing label identification.
10. The apparatus of claim 7, wherein the obtaining module is configured to obtain, from a historical count result and the current count result, selected count information corresponding to the suspected missing tag identifier, and is specifically configured to:
and acquiring optimal inventory information corresponding to the maximum RSSI value of the suspected missing label identification and latest inventory information corresponding to the suspected missing label identification from historical inventory results to obtain selected inventory information.
11. The apparatus of claim 10, wherein the second determining module is configured to re-inventory tags based on the selected inventory information through an external antenna corresponding to an antenna identifier included in the selected inventory information, and determine whether a tag corresponding to the suspected missing tag identifier is missing according to a re-inventory result, and is specifically configured to:
checking a label under the frequency and the power included in the optimal checking information through an external antenna corresponding to the antenna identifier included in the optimal checking information;
if the suspected missing label identification is checked through an external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, determining that the label corresponding to the suspected missing label identification is not missing;
if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the optimal checking information under the frequency and the power included in the optimal checking information, checking the tag through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information; and if the suspected missing tag identification is not checked through the external antenna corresponding to the antenna identification included in the latest checking information under the frequency and the power included in the latest checking information, determining that the tag corresponding to the suspected missing tag identification is missing.
12. The apparatus of any of claims 7-11, further comprising a statistics module and a third determination module, wherein:
the checking module is further configured to sequentially check the tags at the selected power and the second set number of frequencies through the at least two external antennas after detecting the frequency calibration instruction;
the counting module is used for counting the number of the labels checked by the at least two external antennas under each frequency;
the third determining module is configured to determine, as the selected frequency of the corresponding external antenna, a frequency at which the rank of the number of tags checked by each of the at least two external antennas is located before the first set number.
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| CN110991575B (en) * | 2019-11-18 | 2023-05-23 | 深圳市优必选科技股份有限公司 | Asset inventory method and device, readable storage medium and robot |
| CN111667209B (en) * | 2020-04-20 | 2021-01-12 | 上海术源信息科技有限公司 | RFID-based material data checking and calibrating method and system and storage medium |
| CN111967547B (en) * | 2020-07-06 | 2021-11-05 | 深圳市成为信息技术有限公司 | Multi-label checking method, electronic equipment and storage medium |
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