CN114254663A - Method, system and medium for preventing misreading of RFID (radio frequency identification) electronic tags on multiple adjacent objects - Google Patents
Method, system and medium for preventing misreading of RFID (radio frequency identification) electronic tags on multiple adjacent objects Download PDFInfo
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- 238000007781 pre-processing Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 4
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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
- G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- 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 provides a method, a system and a medium for preventing RFID electronic tags on a plurality of adjacent objects from being misread, which comprises the following steps: mounting a plurality of RFID tags on each of a group of adjacent objects; setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object; reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags; grouping the preprocessed RSSI values according to the object identification data, and calculating the difference value of the RSSI values in the group; collecting a certain number of samples, and substituting the collected RSSI values and corresponding difference values into a logistic regression model for training; and distinguishing the objects to be recognized by using the trained model. According to the invention, a plurality of RFID electronic tags are arranged on one object, the RSSI value is preprocessed, a logistic regression model is trained, and the trained model can be used for accurately distinguishing the object to be identified from a plurality of objects which are close to each other.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to a method, a system and a medium for preventing RFID electronic tags on a plurality of adjacent objects from being misread, and particularly relates to a method and a system for distinguishing objects to be identified under the scene that the distances between the RFID electronic tags on the plurality of objects are close.
Background
Radio Frequency Identification (RFID) is a wireless communication technology that can identify a specific target and read and write related data by Radio signals without establishing mechanical or optical contact between an Identification system and the specific target. The RFID is generally composed of a reader-writer, an antenna, an electronic tag and an upper application system.
In practical applications of RFID technology, there may be various types of signal reflections and interference due to the complexity and diversity of the field environment. For a given object to be identified, the reader-writer sends a radio frequency signal with a certain frequency through the antenna, and besides receiving a feedback signal of the RFID electronic tag on the object to be identified, the reader-writer also receives feedback signals of the RFID electronic tags on other similar objects besides the object to be identified, so that an upper-layer software system cannot distinguish the object to be identified from other similar objects.
Patent document CN205890295U discloses a radio frequency identification data bag, including data bag body and radio frequency identification body, the data bag body includes first lamellar body and second lamellar body, each side of first lamellar body and second lamellar body seals in order to form the accommodation space, the radio frequency identification body complex is between first lamellar body and second lamellar body, and be located one of them side of first lamellar body and second lamellar body, the radio frequency identification data bag is when depositing, can realize that the data bag is reversed and place, stagger the position each other of radio frequency identification body, can effectively avoid appearing misreading or can not read relevant information, make relevant personnel can be accurate when seeking to read and read. The technical solution of this patent document staggers the rfid body by the upside-down placement of the object to avoid the situation of misreading, but is not applicable in the situation where the object cannot be upside-down placed.
Disclosure of Invention
In view of the defects in the prior art, the present invention provides a method, a system and a medium for preventing misreading of RFID tags on a plurality of adjacent objects.
The method for preventing the RFID electronic tags on the adjacent objects from being misread comprises the following steps:
the method comprises the following steps: mounting a plurality of RFID tags on each of a group of adjacent objects;
step two: setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object;
step three: reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags;
step four: grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group;
step five: repeating the third step to the fourth step, collecting a certain number of samples, and substituting the collected RSSI values and the corresponding difference values into a logistic regression model for training;
step six: and distinguishing the objects to be recognized by using the model trained in the step five.
Preferably, in the first step, a plurality of RFID tags on the same object write the same identification data.
Preferably, in the first step, the distance between the plurality of RFID tags mounted on each object is set according to the distance between a group of adjacent objects.
Preferably, in the second step, the activation threshold of the RSSI values of a plurality of RFID tags on one object is set according to the distance between a group of adjacent objects.
Preferably, the pretreatment in the third step is specifically: comparing the read RSSI values of all the RFID electronic tags with a set activation threshold, and if the read RSSI values are lower than the set activation threshold, performing attenuation processing on the read RSSI values; if the read RSSI value is higher than the set activation threshold, no processing is performed on the read RSSI value.
Preferably, the attenuation process employs a Sigmoid function or a variant of a ReLU function.
Preferably, the RSSI values corresponding to the RFID tags with the same identification data are grouped in the fourth step, that is, a plurality of RFID tags on the same object are grouped in one group.
Preferably, in the fifth step, a logistic regression model is trained according to the collected sample data, and misreading recognition is performed according to the trained classification model.
The invention provides a system for preventing RFID electronic tags on a plurality of adjacent objects from being misread, which comprises the following modules:
a labeling module: mounting a plurality of RFID tags on each of a group of adjacent objects;
a reading identification module: setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object; reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags; grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group; collecting a certain number of samples, and substituting the collected RSSI values and corresponding difference values into a logistic regression model for training; and distinguishing the objects to be recognized by using the trained model.
According to the present invention, there is provided a computer readable storage medium storing a computer program, which when executed by a processor implements the steps of the method for preventing misreading of RFID tags on a plurality of adjacent objects.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, a plurality of RFID electronic tags are arranged on one object, and the RSSI value is read and preprocessed, so that the object to be identified can be accurately distinguished from a plurality of similar objects with similar positions identified in the identification area.
2. According to the invention, the RSSI value lower than the activation threshold value is attenuated by adopting the attenuation function, so that the difference value between the RSSI value and the RSSI value read by the RFID electronic tag on the object to be identified is increased, and the probability of false identification is reduced.
3. According to the method, the sample data of the RSSI values of the RFID electronic tags on a plurality of similar objects under different relative positions are collected, the logistic regression model is trained by using the sample data, and the trained model is finally utilized to distinguish the objects to be identified, so that the identification accuracy is high.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a frame tag and an antenna according to an embodiment of the invention.
Fig. 2 is a schematic diagram of RSSI attenuation according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention relates to the field of Radio Frequency Identification (RFID) and upper software thereof, in particular to a method and a system for distinguishing objects to be identified under the scene that distances between RFID electronic tags on a plurality of objects are close. The invention provides a method and a system for identifying a plurality of similar objects with similar positions in an area by an RFID reader-writer under the condition that the objects to be identified cannot be accurately distinguished.
The invention provides a method for preventing RFID electronic tags on a plurality of adjacent objects from being misread, in particular to a method for preventing misreading when the distances between the adjacent objects are close, which comprises the following steps:
the method comprises the following steps: mounting a plurality of RFID tags on each of a group of adjacent objects;
step two: setting an activation threshold value for RSSI (Received Signal Strength Indication) values of a plurality of RFID electronic tags on the same object;
step three: reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags;
step four: grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group;
step five: repeating the third step to the fourth step, collecting a certain number of samples, and substituting the collected RSSI values and the corresponding difference values into a logistic regression model for training;
step six: and distinguishing the objects to be recognized by using the model trained in the step five.
In the first step, a plurality of RFID electronic tags on the same object write in the same identification data; the distance between the plurality of RFID tags mounted on each object is set according to the distance between a group of adjacent objects.
In the second step, the activation threshold of the RSSI values of a plurality of RFID electronic tags on one object is set according to the distance between a group of adjacent objects.
The pretreatment in the third step specifically comprises the following steps: comparing the read RSSI values of all the RFID electronic tags with a set activation threshold, and if the read RSSI values are lower than the set activation threshold, performing attenuation processing on the read RSSI values; if the read RSSI value is higher than the set activation threshold, no processing is performed on the read RSSI value. The attenuation process employs a Sigmoid function or a variant of the ReLU function.
In the fourth step, the RSSI values corresponding to the RFID tags having the same identification data are grouped, that is, a plurality of RFID tags on the same object are grouped.
And fifthly, training a logistic regression model according to the collected sample data, and performing misreading identification according to the trained classification model. According to the invention, the number of the RFID electronic tags is increased, the RSSI value of the RFID electronic tags is preprocessed, and finally, a logistic regression model is trained by using calibrated sample data, so that objects to be recognized are distinguished, and the recognition accuracy is improved.
The invention provides a system for preventing RFID electronic tags on a plurality of adjacent objects from being misread, which comprises the following modules:
a labeling module: mounting a plurality of RFID tags on each of a group of adjacent objects;
a reading identification module: setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object; reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags; grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group; collecting a certain number of samples, and substituting the collected RSSI values and corresponding difference values into a logistic regression model for training; and distinguishing the objects to be recognized by using the trained model.
According to the present invention, there is provided a computer readable storage medium storing a computer program, which when executed by a processor implements the steps of the method for preventing misreading of RFID tags on a plurality of adjacent objects.
While the basic embodiment of the present invention has been described above, the present invention will be described in more detail with reference to preferred embodiments and/or variations of the basic embodiment.
Example (b):
in the field of steel logistics, steel coil transportation depends on a heavy-load special frame vehicle, the vehicle is divided into a lower vehicle body and a frame, gaps are reserved on supporting structures on two sides of the frame, and the vehicle body can be driven to the lower portion of the frame to lift the frame and the steel coil for carrying. In order to accurately identify the frame, an RFID reader and an antenna are mounted on the vehicle body, and an RFID electronic tag is mounted on the frame. The parking positions of the frames are not fixed, the adjacent frames may be very close to each other, and radio frequency signals are transmitted to the adjacent frame tags through gaps among the frames, so that false identification is caused. The invention can solve the problem that the adjacent frame is mistakenly identified under the condition that the parking distance of the adjacent frame is too close. A method for preventing misreading of RFID tags on a plurality of nearby (adjacent) objects, which is specifically as follows in this embodiment:
1. 2 RFID electronic tags are arranged on each frame, and the same identification data is written in (as shown in figure 1);
2. adjusting the distance between 2 RFID electronic tags on the same frame according to the field condition;
3. acquiring the setting of the RSSI attenuation threshold of the label through a field experiment;
4. the vehicle-mounted software and the RFID antenna feeder system read all 4 tag data and corresponding RSSI values of 2 groups (2 tags on one frame are a group) on adjacent frames;
5. according to the set attenuation threshold, carrying out attenuation processing on all RSSIs lower than the threshold (as shown in FIG. 2), and not carrying out any processing on all RSSIs higher than the threshold, wherein the attenuation function can select a Sigmoid function or a variant of a ReLU function according to the situation;
6. calculating difference values of the RSSI of 2 tags in the same group;
7. repeating the step 4-6, collecting a certain number of samples, and substituting the samples into the logistic regression model for training;
8. and when the system is actually deployed, distinguishing by using the trained model.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A method for preventing misreading of RFID electronic tags on a plurality of adjacent objects is characterized by comprising the following steps:
the method comprises the following steps: mounting a plurality of RFID tags on each of a group of adjacent objects;
step two: setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object;
step three: reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags;
step four: grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group;
step five: repeating the third step to the fourth step, collecting a certain number of samples, and substituting the collected RSSI values and the corresponding difference values into a logistic regression model for training;
step six: and distinguishing the objects to be recognized by using the model trained in the step five.
2. The method for preventing the misreading of the RFID tags of the adjacent objects as claimed in claim 1, wherein in the first step, the RFID tags on the same object write the same identification data.
3. The method according to claim 1, wherein in the first step, the distance between the plurality of RFID tags mounted on each object is set according to the distance between a group of adjacent objects.
4. The method according to claim 1, wherein in the second step, the threshold for activating the RSSI values of the RFID tags on one object is set according to the distance between a group of adjacent objects.
5. The method for preventing the misreading of the RFID electronic tags on the adjacent objects according to claim 1, wherein the preprocessing in the third step is specifically as follows: comparing the read RSSI values of all the RFID electronic tags with a set activation threshold, and if the read RSSI values are lower than the set activation threshold, performing attenuation processing on the read RSSI values; if the read RSSI value is higher than the set activation threshold, no processing is performed on the read RSSI value.
6. The method for preventing misreading of RFID electronic tags on a plurality of adjacent objects according to claim 5, wherein said attenuation process employs a Sigmoid function or a variant of a ReLU function.
7. The method according to claim 1, wherein the RSSI values corresponding to the RFID tags with the same identification data are grouped into one group in the fourth step, that is, the plurality of RFID tags on the same object are grouped into one group.
8. The method according to claim 1, wherein the logistic regression model is trained according to the collected sample data in the fifth step, and the misreading recognition is performed according to the trained model.
9. A system for preventing misreading of RFID tags on a plurality of adjacent objects comprises the following modules:
a labeling module: mounting a plurality of RFID tags on each of a group of adjacent objects;
a reading identification module: setting an activation threshold value for RSSI values of a plurality of RFID electronic tags on the same object; reading all RFID electronic tags in a certain area, and preprocessing the RSSI value of the read RFID electronic tags; grouping the preprocessed RSSI values according to the identification data of the object, and calculating the difference value of the RSSI values in the group; collecting a certain number of samples, and substituting the collected RSSI values and corresponding difference values into a logistic regression model for training; and distinguishing the objects to be recognized by using the trained model.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method for preventing misreading of RFID tags on a plurality of adjacent objects according to any one of claims 1 to 8.
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Cited By (1)
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| GB2619552A (en) * | 2022-06-10 | 2023-12-13 | Sony Interactive Entertainment Europe Ltd | Computer implemented method and system for providing an augmented reality entertainment environment |
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