CN109697490B - Radio frequency identification electronic tag information writing method and device - Google Patents
Radio frequency identification electronic tag information writing method and device Download PDFInfo
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- CN109697490B CN109697490B CN201910006361.XA CN201910006361A CN109697490B CN 109697490 B CN109697490 B CN 109697490B CN 201910006361 A CN201910006361 A CN 201910006361A CN 109697490 B CN109697490 B CN 109697490B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06K17/0003—Automatic card files incorporating selecting, conveying and possibly reading and/or writing operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
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Abstract
The invention provides a method and a device for writing radio frequency identification electronic tag information, wherein the method comprises the following steps of acquiring all radio frequency identification electronic tags in a read-write range and a feedback RSSI value; determining a first radio frequency identification electronic tag with the maximum RSSI value; and carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag. The invention improves the accuracy of writing the radio frequency identification electronic tag information and ensures the ordered progress of the information writing process.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to a method and a device for writing radio frequency identification electronic tag information.
Background
The radio frequency identification technology is a non-contact information identification technology, interaction can be carried out between a radio frequency identification reader-writer and a radio frequency identification electronic tag at a certain distance, the convenience of practical application can be greatly improved by realizing remote identification, but a new problem can be introduced in the writing process of issuing information and the like. Tag issuance is to write corresponding identification information into a new rfid tag, and since the identification information is related information for identifying the identity of a specific object (such as a vehicle, etc.), the identification information written in different rfid tags may be different. However, when information is written in, the rfid reader can perform communication interaction with all rfid tags in the read-write range at the same time, and if information needs to be written in a specific rfid tag in a directional manner, a plurality of rfid tags exist in the read-write range, so that independent operation cannot be achieved.
For high frequency radio frequency identification (such as bus card) of 13.56MHz, the identification distance is less than ten centimeters, so the radio frequency identification is less susceptible to the influence of the radio frequency identification electronic tag beside the issuing information writer in the information writing process. However, UHF RFID at the frequency band of 920-925MHz has a large impact due to the long read/write range. The electronic identification technology of the motor vehicle in the ultrahigh frequency radio frequency identification is an important development branch of the radio frequency identification technology in recent years, as the radio frequency identification technology applied to vehicle identity identification, the identification distance is usually far greater than the distance of the high frequency radio frequency identification in corresponding scenes, even if the transmission power is adjusted in scenes such as label issuing and the like, the identification information is easily wrongly written into other radio frequency identification electronic labels to be issued beside an issuing information writer, the accuracy of information writing is greatly influenced, and the writing of the radio frequency identification electronic label information is disordered and uncontrollable.
Disclosure of Invention
The invention aims to provide a method and a device for writing radio frequency identification electronic tag information, which solve the technical problems that in the prior art, the writing of the radio frequency identification electronic tag information is disordered and cannot be controlled, and the condition of wrong writing frequently occurs.
In order to solve the above technical problem, the present invention provides a rfid tag information writing method for determining whether to place an rfid tag by a sensor integrated with an issuer writer, wherein when the rfid tag is placed on the issuer writer, an information writing operation to the rfid tag is responded; and wherein the following steps are performed:
acquiring all radio frequency identification electronic tags and feedback RSSI values in a read-write range;
determining a first radio frequency identification electronic tag with the maximum RSSI value;
carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag;
meanwhile, a first threshold value is set, and when the RSSI value fed back by the first radio frequency identification electronic tag is smaller than the first threshold value, the operation enabling of directional communication with the first radio frequency identification electronic tag is closed;
the security module is used for carrying out password operation authentication and security protection on radio frequency identification interaction, and executes corresponding writing operation including written radio frequency identification electronic tag identification numbers by receiving a writing control command of the control module.
As a further improvement of the above-mentioned method for writing information into an rfid tag according to the present invention, the information written into the first rfid tag through directional communication is issue information including a card number, a dealing code, a use property, a date of delivery, a vehicle type, power, a discharge capacity, a number type, a number, an inspection validity period, a forced expiration period, a certified passenger/total mass, and a vehicle body color.
In order to solve the above technical problem, an rfid tag information writing apparatus according to the present invention includes:
the acquisition unit is used for acquiring all radio frequency identification electronic tags and the feedback RSSI values in a read-write range;
the determining unit is used for determining the first radio frequency identification electronic tag with the maximum RSSI value;
the writing unit is used for carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag;
the write-in unit performs directional communication with the first radio frequency identification electronic tag, specifically, sends a handshake signal to the first radio frequency identification electronic tag through the security module to enable the first radio frequency identification electronic tag to respond and activate, the security module is used for performing password operation authentication and security protection on radio frequency identification interaction, and the security module executes corresponding write-in operation including a written-in radio frequency identification electronic tag identification number by receiving a write-in control command of the control module.
As a further improvement of the above rfid tag information writing apparatus of the present invention, the determining unit sets a first threshold, and when the RSSI value fed back by the first rfid tag is smaller than the first threshold, the operation enabling of the directional communication with the first rfid tag is turned off.
As a further improvement of the above rfid tag information writing apparatus of the present invention, the information written by the writing unit to the first rfid tag through directional communication is release information including a card number, a dealing code, a use property, a delivery date, a vehicle type, power, a discharge capacity, a number type, a number, an inspection validity period, a forced scrapping period, a certified passenger/total mass, and a vehicle body color.
As a further improvement of the above-mentioned rfid tag information writing apparatus of the present invention, it is determined whether or not the rfid tag is placed by a sensor integrated with an issuing information writer, and the acquisition unit starts responding to an information writing operation to the rfid tag when the rfid tag is placed on the issuing information writer.
Compared with the prior art, the invention checks all the radio frequency identification electronic tags in the read-write range through the issuing information writer, obtains the RSSI value fed back by each radio frequency identification electronic tag, and selects the radio frequency identification electronic tag with the largest RSSI value as the object of directional communication to control the write-in information. The invention improves the accuracy of writing the radio frequency identification electronic tag information and ensures the ordered progress of the information writing process.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a distribution information writer distribution scenario.
Fig. 2 is a flowchart of a method for writing rfid tag information according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an rfid tag information writing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
It should be noted that the same reference numbers or labels may be used in different embodiments, but these do not represent an absolute relationship in structure or function. Also, references to "first", "second", and the like in the embodiments do not represent absolute relationships of structural or functional distinction, and these are merely for convenience of description.
The radio frequency identification electronic tag is usually used for being attached to an object, for example, the radio frequency identification electronic tag is mounted on a front windshield of a vehicle, correspondingly, identification information corresponding to the object is stored in the radio frequency identification electronic tag, and relevant information of the object can be known by acquiring the identification information in the radio frequency identification electronic tag through a radio frequency identification reader-writer. The identification information in the rfid tag is usually written with corresponding identification information in advance according to the usage object of the rfid tag before the tag is issued, such as vehicle registration information written in the electronic identification of the motor vehicle. As shown in fig. 1, the issuing information writer 10 is a radio frequency identification reader/writer dedicated for writing identification information into a radio frequency identification electronic tag, and may be connected to a computer, and the computer controls the written identification information, and when the radio frequency identification electronic tag 22 is placed on the issuing information writer 10, the issuing information writer 10 may trigger interaction with the radio frequency identification electronic tag 22 according to a command to write corresponding identification information. However, for example, in the case of an electronic identifier of a motor vehicle, corresponding information writing of the radio frequency identification electronic tag is to write issuing information requiring the license plate of the vehicle into the radio frequency identification electronic tag, and the information writing scene in this respect is often a situation in which a plurality of cards are required to be simultaneously written. The whole process can be shown in fig. 1, where the rfid tag 21 to be issued is placed on one side of the issuing information writer 10, and the issued rfid tag 23 may be placed on the other side of the issuing information writer 10. However, since the read/write range of the electronic rfid writer 10 is not limited to the position where the electronic rfid tag is placed by the electronic rfid writer 10, and may also cover the range near the electronic rfid writer 10 due to the diffusion of the radio frequency signal, the generated radio frequency signal may not only act on the electronic rfid tag 22, but also affect the electronic rfid tag 21 and the electronic rfid tag 23, and may even erroneously write corresponding identification information into the electronic rfid tag 21 to be issued or erroneously rewrite identification information in the issued electronic rfid tag 23. Therefore, the rfid tag on the issuing information writer 10 cannot guarantee normal writing information, but the rfid tag near the issuing information writer 10 wrongly writes information, so that the entire tag issuing process is disordered, and the operator cannot know which rfid tag the corresponding identification information is written randomly, and if the other rfid tags are placed far from the issuing information writer, it is obviously impractical in actual operation, and it is very inconvenient for the operator to issue the rfid tags in batches.
As shown in fig. 2, a flow chart of a method for writing rfid tag information according to an embodiment of the present invention is shown. In order to solve the problem of confusion of information writing in scenes such as label issuing, the radio frequency identification electronic label information writing method specifically comprises the following steps:
step S1, acquiring all the rfid tags and the RSSI (Received Signal Strength Indication) values fed back within the read-write range. As described above, the issuing information writer interacts with the rfid tag by a radio frequency signal, and is used exclusively for operations such as writing information into the rfid tag. Taking an electronic identification of an automobile as an example, the corresponding radio frequency identification electronic tag can perform radio frequency communication under the activation of the issuing information writer, and receive the written information sent by the issuing information writer. In the interaction process, the radio frequency identification electronic tag also feeds back a corresponding radio frequency signal to the issuing information writer, and the fed back radio frequency signal can obtain a corresponding RSSI value through receiving. For the issuing information writer, the detected rfid tag, i.e. the rfid tag in the read/write range of the issuing information writer, ideally, only the rfid tag placed on the issuing information writer is detected, but since the coverage of the rf signal cannot be accurately controlled, the rfid tag at a position near the issuing information writer may be detected. Therefore, the plurality of rfid tags in the read/write range can be acquired through the inventory, specifically, the trigger of the inventory is implemented according to the write command received by the corresponding information issuing writer, the inventory refers to sending a specific command to the outside in a specific time range to acquire the feedback of the rfid tags in the read/write range, the rfid tags in the read/write range and the feedback RSSI values are counted through the inventory, and in order to more accurately acquire the RSSI values returned by the rfid tags, the inventory can be performed for a plurality of times, and the RSSI values returned by the corresponding rfid tags are weighted and counted. In further embodiments, a sensor for inductively placing the rfid tag, such as an infrared sensor, an optical sensor, or a mechanical sensor, may be integrated on the corresponding issuing information writer, so as to ensure that the rfid tag information writing operation is performed only when the rfid tag is placed on the issuing information writer. Specifically, when the corresponding issuing information writer receives a card writing command sent by the connected operating computer, if it is determined by sensing that the issuing information writer has the rfid tag, the steps S1 to S3 are started, and if it is determined by sensing that the issuing information writer does not have the rfid tag, the corresponding rfid tag information writing operation is not executed, and further, a non-issuing-tag notification message may be sent to the computer. In another embodiment, an information queue for writing a plurality of cards can be set by operating the computer, and when the sensor of the information issuing writer senses that the radio frequency identification electronic tag is put in, the information writing operation is automatically executed, and information to be written is taken out from the information queue and written into the corresponding radio frequency identification electronic tag, so that the rapid information writing of the radio frequency identification electronic tags can be realized.
And step S2, determining the first radio frequency identification electronic tag with the maximum feedback RSSI value. As described above, when different rfid tags are detected, the feedback signal of each rfid tag can be measured to obtain a corresponding RSSI value for determining the link quality, and this data can reflect the distance between the signal point and the receiving point. Therefore, the RSSI value fed back by each rfid tag is different due to different placement positions, and the first rfid tag feeding back the RSSI value with the maximum RSSI value is determined by comparing the RSSI values fed back by all the rfid tags. As described above, the characteristics of the RSSI value determine that the larger the RSSI value, the closer the distance to the rfid reader, whereas the smaller the RSSI value, the farther the distance to the rfid reader, and therefore the first rfid tag is usually the rfid tag placed on the issuing information writer. Specifically, the identification numbers corresponding to all the radio frequency identification electronic tags acquired by the queue cache inventory may be obtained, the RSSI value corresponding to the radio frequency identification electronic tag corresponding to each identification number may be recorded, and the identification number with the largest RSSI value, that is, the first radio frequency identification electronic tag, may be further determined through a corresponding sorting algorithm or comparative analysis. Since the first rfid tag is determined by comparing RSSI values, a relative algorithm is adopted, that is, as long as there is an rfid tag in the read/write range, a first rfid tag with the largest RSSI value is determined, and if the rfid tag is not placed on the issuing information writer and the checked rfid tag is a to-be-issued or issued rfid tag placed beside the issuing information writer, a write error occurs if the rfid tag with the largest RSSI value is determined by simply comparing, so in a preferred embodiment, a first threshold value is further set, the first threshold value is used to indicate the minimum RSSI value that the rfid tag placed on the issuing information writer can feed back, and the first threshold value is a preset reference threshold value, according to a reasonable value determined by the link quality received by the issuing information writer, when the RSSI value fed back by the first radio frequency identification electronic tag is smaller than a first threshold value, the first radio frequency identification electronic tag is determined not to be the radio frequency identification electronic tag placed on the issuing information writer, and at the moment, directional communication is not carried out on the corresponding first radio frequency identification electronic tag, namely, the operation enabling of the directional communication with the first radio frequency identification electronic tag is closed. Even if the corresponding issuing information writer receives the corresponding card writing command, the corresponding card writing operation is not executed, and further, no issuing label can be prompted.
And step S3, carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag. After the first radio frequency identification electronic tag is determined, corresponding operation can be performed on the first radio frequency identification electronic tag. The first radio frequency identification electronic tag has a corresponding identification number, and the identification number is used for uniquely determining one radio frequency identification electronic tag and can be used as an identifier for radio frequency identification interaction to distinguish different radio frequency identification electronic tags. According to the identification number of the first radio frequency identification electronic tag, a handshake process before information writing can be carried out with the first radio frequency identification electronic tag. The method specifically comprises the steps that handshake information for a first radio frequency identification electronic tag is sent to all radio frequency identification electronic tags in a read-write range, the received radio frequency identification electronic tags can be correspondingly handshake-interacted and activated only through the first radio frequency identification electronic tag, when an information write-in writer sends out a control signal for writing information, the written information is received because only the first radio frequency identification electronic tag is in an activated state, and other radio frequency identification electronic tags do not respond because other radio frequency identification electronic tags are not in the activated state. In order to improve the security of the radio frequency identification, a handshake signal can be sent to the first radio frequency identification electronic tag through a security module, the security module is used for carrying out password operation authentication and security protection on the radio frequency identification interaction, and the security module executes corresponding write-in operation by receiving a write-in control command of a control module, and at least can include written-in information content and a written-in radio frequency identification electronic tag identification number.
As described above, the directional communication with the first rfid tag may specifically be writing of corresponding identification information into the first rfid tag, and for the electronic identifier of the motor vehicle, since the corresponding rfid tag is installed on a front windshield of the vehicle and is used for identifying an identity of the vehicle, the identification information written into the rfid tag may correspondingly be vehicle registration information and the like, and is used for representing an identity of the vehicle corresponding to the object to be used, and may specifically include issuing information such as a card number, a card issuing code, a use property, a date of leaving the factory, a vehicle type, power, a displacement, a number type, a number, a verification validity period, a forced expiration period, a verification of passenger/total mass, a vehicle body color, and the like.
As shown in fig. 3, a schematic diagram of an rfid tag information writing apparatus according to an embodiment of the present invention is shown. The RFID electronic tag information writing device comprises an acquisition unit U1, a determination unit U2 and a writing unit U3, and the information writing process of the RFID electronic tag is realized through the cooperation among the acquisition unit U1, the determination unit U2 and the writing unit U3.
And the acquisition unit U1 is used for acquiring all radio frequency identification electronic tags in the read-write range and the feedback RSSI value. The obtaining unit U1 is the starting action of the whole information writing operation, and can finally judge the rfid tag placed on the issuing information writer by analyzing the response characteristics of the rfid tag in the reading and writing range. The obtaining unit U1 may obtain the identification number of the specific rfid tag through feedback of the rfid tag, and further may determine the RSSI value of the corresponding rfid tag by measuring the strength of the received signal. In further embodiments, whether the rfid tag is placed is determined by a sensor integrated with the issuer writer, for example, by an infrared induction switch, a photoelectric induction switch, or a mechanical induction switch, and the obtaining unit U1 may respond to a trigger to write information to the rfid tag, specifically, to respond to a written information command issued by a computer. In further embodiments, the obtaining unit U1 may also determine the placement of rfid tags through a sensor integrated with an information writer to realize triggering, so as to realize automatic writing when multiple rfid tags are operated.
And the determining unit U2 is used for determining the first radio frequency identification electronic tag with the maximum fed-back RSSI value. The determining unit U2 is configured to determine the first rfid tag having the largest RSSI value based on the information of the relevant rfid tags acquired by the acquiring unit U1, as described above, the RSSI value can be determined to some extent as to how far each rfid tag is from the issuing information writer, the rfid tag closest to the issuing information writer can be determined by determining the rfid tag having the largest RSSI value, and if the rfid tag is placed on the issuing information writer, the first rfid tag closest to the issuing information writer is the rfid tag placed on the issuing information writer. If the rfid tag is not placed on the issuing information writer or the rfid tag placed on the issuing information writer is damaged, the first rfid tag closest to the issuing information writer may be the rfid tag beside the issuing information writer and acquired by a large reading/writing range, and preferably, the determining unit U2 may set a first threshold, and when the RSSI value fed back by the first rfid tag is smaller than the first threshold, it indicates that the first rfid tag is not in the issuing information writer, and the operation of closing the directional communication with the first rfid tag may be enabled, that is, the writing operation of the first rfid tag by the writing unit U3 may not be triggered.
And the writing unit U3 is used for carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag. The determination unit U2 may determine the specific first rfid tag placed on the issuing information writer, so that directional communication with the first rfid tag is possible. Specifically, the control module may send a handshake signal to the first rfid tag to activate the first rfid tag in response, and the handshake signal tells all the rfid tags that only the first rfid tag receives corresponding written information, and may specifically use the identification number of the rfid tag to perform the determination, so that it may be ensured that only the first rfid tag is in an activated state when the information writer issues the directional communication, and at this time, when the corresponding written information is issued to the information writer, the first rfid tag may store the corresponding information in a storage module inside the rfid tag. In a preferred embodiment, a security module is further disposed behind the control module, specifically, the control module sends a corresponding write-in instruction to the security module according to the first rfid tag determined by the inventory, and the security module performs handshake and card writing according to the write-in instruction sent by the control module. Specifically, taking the electronic identifier of the motor vehicle mounted on the windshield of the vehicle as an example, the written information may be release information including a card number, a dealing code, a use property, a factory date, a vehicle type, power, a discharge capacity, a number plate type, a number plate number, a verification validity period, a forced scrapping period, a checked passenger/total mass, and a vehicle body color, and is used for representing the identity of the vehicle. The information writing process of a new radio frequency identification electronic tag can be completed through the writing unit U3, the electronic identification of the motor vehicle, in which the vehicle registration information and other issued information are written, can be installed at the corresponding position of the front windshield of the motor vehicle according to the specified installation position to realize the corresponding license plate putting work, so that the function of identifying the vehicle identity as that of an iron license plate can be realized, when the vehicle passes through the corresponding road position where the radio frequency identification reader-writer is installed, the information that the corresponding identity vehicle passes through the corresponding position can be obtained, the management of the vehicle is realized, and a convenient and fast solution is provided for the management of intelligent traffic. It should be noted that, the specific embodiment of the rfid tag information writing apparatus may also refer to the specific embodiment of the rfid tag information writing method.
In connection with the technical solutions of the methods disclosed in the present Application, the methods may be directly embodied as hardware, a software module executed by a control unit, or a combination of the two, that is, one or more steps and/or one or more steps combinations, and may correspond to each software module of a computer program flow, or may correspond to each hardware module, for example, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or any suitable combination thereof. For convenience of description, the above-mentioned apparatuses are described as being divided into various modules by function, and of course, the functions of the modules may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus a necessary general hardware platform. Based on this understanding, the technical solutions of the present application may be embodied in the form of software products, which essentially or partially contribute to the prior art. The software is executed by a micro-control unit, which may include one or more micro-control units of any type, depending on the desired configuration, including but not limited to a micro-control unit, a microcontroller, a DSP (Digital Signal Processor), or any combination thereof. The software is stored in a memory, such as a volatile memory (e.g., random access memory, etc.), a non-volatile memory (e.g., read-only memory, flash memory, etc.), or any combination thereof.
In summary, the invention checks all the rfid tags in the read/write range by the release information writer, obtains the RSSI value fed back by each rfid tag, and selects the rfid tag with the largest RSSI value as the target of directional communication to control the write information. The invention improves the accuracy of writing the radio frequency identification electronic tag information and ensures the ordered progress of the information writing process.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A radio frequency identification electronic tag information writing method is characterized in that a sensor integrated by an issuing information writer is used for determining whether a radio frequency identification electronic tag is placed, and when the radio frequency identification electronic tag is placed on the issuing information writer, the information writing operation of the radio frequency identification electronic tag is responded; and wherein the following steps are performed:
acquiring all radio frequency identification electronic tags and feedback RSSI values in a read-write range;
determining a first radio frequency identification electronic tag with the maximum RSSI value;
carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag;
meanwhile, a first threshold value is set, and when the RSSI value fed back by the first radio frequency identification electronic tag is smaller than the first threshold value, the operation enabling of directional communication with the first radio frequency identification electronic tag is closed;
the security module is used for carrying out password operation authentication and security protection on radio frequency identification interaction, and executes corresponding writing operation including written radio frequency identification electronic tag identification numbers by receiving a writing control command of the control module.
2. The method according to claim 1, wherein the information written to the first rfid tag by directional communication is release information including card number, dealing code, use property, date of shipment, vehicle type, power, discharge capacity, number type, number, inspection expiration date, forced expiration date, approved passenger/total mass, and vehicle body color.
3. An RFID tag information writing device is characterized in that the RFID tag information writing device is used for determining whether the RFID tag is placed or not through a sensor integrated with an issuing information writer, and when the RFID tag is placed on the issuing information writer, the information writing device responds to the information writing operation of the RFID tag; the device comprises:
the acquisition unit is used for acquiring all radio frequency identification electronic tags and the feedback RSSI values in a read-write range;
the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining a first radio frequency identification electronic tag with the maximum RSSI value, setting a first threshold value, and closing the operation enabling of directional communication with the first radio frequency identification electronic tag when the RSSI value fed back by the first radio frequency identification electronic tag is smaller than the first threshold value;
The writing unit is used for carrying out directional communication with the first radio frequency identification electronic tag according to the identification number of the first radio frequency identification electronic tag;
the write-in unit carries out directional communication with the first radio frequency identification electronic tag, specifically, a handshake signal is sent to the first radio frequency identification electronic tag through a security module to enable the first radio frequency identification electronic tag to respond and activate, the security module is used for carrying out password operation authentication and security protection on radio frequency identification interaction, and the security module executes corresponding write-in operation including a written-in radio frequency identification electronic tag identification number by receiving a write-in control command of a control module.
4. The device as claimed in claim 3, wherein the information written by the writing unit to the first rfid tag through directional communication is release information including card number, dealing code, use property, date of delivery, vehicle type, power, discharge capacity, kind of number plate, number plate number, inspection validity period, mandatory discard period, approved and ordered passenger/total mass, and vehicle body color.
5. The rfid tag information writing apparatus according to claim 3, wherein the determination as to whether or not the rfid tag is placed is made by a sensor integrated with an issuer information writer, and the acquiring unit starts responding to an information writing operation to the rfid tag when the rfid tag is placed on the issuer information writer.
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| CN113283258B (en) * | 2021-06-02 | 2024-04-23 | 上海宜链物联网有限公司 | Method capable of automatically searching optimal working frequency point of electronic tag and reading device |
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