A high-performance reader module based on a radio frequency chip

Abstract

The application provides a high-performance reader module based on a radio frequency chip, comprising: a communication module, which is used for detecting radio frequency tags in a preset range through a reading and writing device and acquiring real-time position information of the radio frequency tags; a radio frequency module, which is used for generating a radio frequency signal by performing radio frequency modulation on a preset initial signal through a radio frequency chip and the position information of the radio frequency tags; a reading and writing control module, which is used for generating radio frequency data by performing encryption and decoding on the radio frequency signal through the radio frequency chip and reading corresponding radio frequency tags; and a reading and writing optimization module, which is used for performing anti-signal collision optimization processing on radio frequency signal transmission according to the radio frequency data.The application has the beneficial effects that the security and accuracy of radio frequency identification are improved by performing encryption and decoding on the radio frequency identification, the radio frequency identification efficiency is improved by performing anti-signal collision optimization processing, and the efficiency of signal transmission is enhanced.

Description

Technical Field

[0001] This invention relates to the field of core electronic technology, and in particular to a high-performance reader / writer module based on a radio frequency chip. Background Technology

[0002] Currently, the application scope of RFID readers is becoming increasingly widespread, involving shopping, logistics, travel security, unmanned supermarkets, and other fields. As the application scope expands, the targets of RFID reading and writing are also changing. Unlike ordinary barcode scanning and recognition in supermarkets, more and more usage scenarios revolve around multiple read / write targets moving in different directions. RFID readers can accurately read and write multiple read / write targets, thereby achieving low-cost management of complex scenarios. However, when reading and writing multiple read / write targets, there is often a problem where there are too many targets within a certain range, causing signal transmission collisions, resulting in slow transmission speeds and chaotic signal transmission, making effective management impossible. For example, the "High-Performance Reader Module Based on Domestic RFID Chip" application number "202021735559.6" shortens the connection trace length between the reader chip, RF power amplifier, and coupler by changing the positional relationship of components in the circuit, thereby reducing power loss and enhancing the antenna signal transmission and reception performance. However, it cannot solve the problem of avoiding signal collisions and efficiently reading multiple read / write targets within a certain area within a certain time. Summary of the Invention

[0003] This invention provides a high-performance reader / writer module based on an radio frequency chip, which solves the problem of avoiding signal collisions and efficiently reading multiple read / write targets within a certain area within a certain time.

[0004] A high-performance reader / writer module based on an RF chip includes:

[0005] Communication module: used to detect RFID tags within a preset range and obtain their real-time location information via a reader / writer; wherein,

[0006] Radio frequency module: Used to perform radio frequency modulation on a preset initial signal using the location information of the radio frequency chip and the radio frequency tag to generate a radio frequency signal;

[0007] Read / write control module: used to encrypt and decode radio frequency signals through the radio frequency chip, and read the corresponding radio frequency tags to generate radio frequency data;

[0008] Read / write optimization module: used to perform anti-signal collision optimization processing on the radio frequency signal transmission based on the radio frequency data.

[0009] Furthermore: the communication module includes:

[0010] Tag detection unit: used to determine the monitoring range of the read / write device, collect tag signals within the monitoring range, and determine the pre-identified tag signal; wherein,

[0011] The read / write device consists of a reader antenna, an RF chip, an RF interference filter, an RF receiver, an RF power amplifier, and a coupler.

[0012] Tag distribution unit: used to determine the distribution information of the pre-identified tag signal within a preset range based on the pre-identified tag signal; wherein,

[0013] The distribution information includes: single-tag signal distribution information and multi-tag signal distribution information;

[0014] Tag identification unit: used to determine the real-time location information of the pre-identified tag signal based on the distribution information.

[0015] Furthermore: the tag recognition unit includes:

[0016] Tag strategy subunit: used to set distribution strategy rules and generate corresponding tag recognition strategies based on the distribution information and different tag distribution data in the preset distribution strategy database;

[0017] Tag recognition subunit: used to establish a distribution map of the pre-identified tag signal using the tag recognition strategy, and to determine the real-time location information of the tag signal using the distribution map; wherein,

[0018] When the pre-identified tag signal is a single tag signal distribution, the radio frequency tag information in the tag signal is directly identified;

[0019] When the pre-identified tag signal is a multi-tag signal distribution, the radio frequency tag information in the tag signal is identified sequentially according to the signal strength corresponding to the tag signal;

[0020] The identification methods for the pre-identified tag signals include: static identification and dynamic identification.

[0021] Furthermore: the radio frequency module includes:

[0022] Radio frequency interface unit: used to generate an initial signal through the radio frequency receiver and voltage regulator;

[0023] Radio frequency (RF) conditioning unit: used to adjust the initial current corresponding to the initial signal through the voltage regulator and RF chip, and generate RF current.

[0024] Radio frequency coupling unit: used to frequency modulate the initial signal through the coupler and radio frequency current to generate a radio frequency signal.

[0025] Furthermore: the read / write control module includes:

[0026] Encoding unit: used to issue encoding instructions through the radio frequency chip to encrypt and encode the radio frequency signal, generating an encrypted radio frequency signal; wherein,

[0027] The encryption encoding includes: source encryption encoding and channel encryption encoding;

[0028] Reading unit: used to transmit the encrypted radio frequency signal to the radio frequency tag within a preset range according to the radio frequency chip and the reader antenna, and to read the signal from the radio frequency tag to generate a radio frequency reading signal;

[0029] Decoding unit: used to receive the radio frequency reading signal corresponding to the radio frequency tag through the reader antenna and radio frequency chip, decode the radio frequency reading signal, and generate a decoded signal;

[0030] Amplification unit: used to amplify the decoded radio frequency signal through the radio frequency power amplifier and radio frequency chip to generate an amplified radio frequency signal, and to convert the amplified radio frequency signal to generate radio frequency data.

[0031] Furthermore: the radio frequency coupling unit includes:

[0032] Frequency modulation subunit: used to control the coupler and RF current through the RF chip to generate a preprocessed signal;

[0033] De-interference subunit: used to perform de-interference processing on the preprocessed signal through the radio frequency interference filter to generate a de-interference signal;

[0034] Radio frequency amplification subunit: used to control the radio frequency power amplifier through the radio frequency chip to amplify the interference removal signal and generate a radio frequency signal.

[0035] Furthermore: the read / write optimization module includes:

[0036] Collision detection unit: used to perform radio frequency signal collision detection through the radio frequency chip and reader antenna, and to obtain the detection results; wherein,

[0037] If the detection result indicates that there is no radio frequency signal collision, then the radio frequency signal is sent directly;

[0038] When the detection result indicates the presence of radio frequency signal collision, radio frequency signal segmentation is performed;

[0039] Collision analysis unit: used to identify the frequency of the radio frequency signal by dividing it into radio frequency chips and radio frequency signals, and to determine the signal category of the radio frequency signal;

[0040] Collision optimization unit: Based on the RF chip and signal type, generates an anti-collision strategy and performs anti-collision processing according to the anti-collision optimization strategy; wherein...

[0041] The anti-collision optimization strategy includes a multi-signal channel transmission strategy, an interval signal reception strategy, and a signal filtering and classification strategy.

[0042] Furthermore: the collision optimization unit includes:

[0043] Monitoring subunit: used to monitor the carrier waves of several preset assisting chips through the radio frequency chip and the reader antenna, and to acquire monitoring data;

[0044] The monitoring and judgment subunit is used to perform monitoring and judgment based on the monitoring data and generate a monitoring and judgment result; wherein...

[0045] When the monitoring result indicates that an assisting chip is transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip will pause the transmission of radio frequency signals until the assisting chip completes the transmission.

[0046] When the monitoring judgment result indicates that there is no assisting chip transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip transmits radio frequency signals and performs transmission judgment.

[0047] Transmission Judgment Subunit: When the RF chip transmits an RF signal to the RF tag, it determines whether an RF read signal is received within a preset transmission time. If the reception is successful, the RF read signal is encrypted and decoded; otherwise, the RF signal is transmitted to the tag signal again.

[0048] The preset transmission time includes: the round-trip transmission time of the radio frequency signal to the radio frequency tag, and the reading time of the tag signal.

[0049] Furthermore, the read / write optimization module also includes:

[0050] Signal stabilization unit: used to calculate the signal frequency deviation θ(x) corresponding to the radio frequency signal, wherein the signal frequency deviation is within the signal deviation rate threshold: where,

[0051]

[0052] Where, θ * Let μ(x) be the signal phase influence function caused by instability factors, where x is the instability factor and x is a variable. The initial frequency is fixed. Take the partial derivative of the signal phase influence function with respect to the instability factor, where k is the signal deviation threshold; Indicates the signal deviation rate threshold;

[0053] Transmission loss variance unit: used to calculate the transmission loss variance of the radio frequency signal based on the signal frequency deviation and the acquired radio frequency deviation data set;

[0054] Optimization processing unit: used to make read / write decisions based on the transmission loss variance of the radio frequency signal; wherein,

[0055] When the transmission loss variance is within a preset threshold range, read and write operations continue; when the transmission loss variance is outside the preset threshold range, radio frequency signal filtering is performed, and the target radio frequency signal is determined after signal filtering; wherein,

[0056] The radio frequency signal filtering is used to determine the target signal frequency threshold of the target radio frequency signal through the signal deviation rate threshold, and to perform signal filtering based on the target signal frequency threshold.

[0057] Furthermore: the transmission loss variance unit also includes:

[0058] RF bias subunit: used to calculate the RF bias based on the signal frequency bias θ(x) and the acquired RF bias data set.

[0059]

[0060] Where t is the average transmission time of the radio frequency signal. Let θ(x) be the RF deviation corresponding to the t-th data point in the RF deviation data set with an average transmission time of t, where y is a variable and 1 ≤ y, x is a variable and y ≤ x ≤ y + t, and θ(x) represents the signal frequency deviation. * The initial fixed frequency;

[0061] Transmission loss variance subunit: based on the aforementioned RF deviation Determine the corresponding average RF deviation And calculate the variance of the transmission loss of the radio frequency signal under the stable frequency condition with an average transmission time of t.

[0062]

[0063] Where ω is the number of RF deviation data points, and ε is the loss coefficient. Let be the RF deviation corresponding to the (n+1)th data in the RF deviation data set when the average transmission time is t.

[0064] The beneficial effects of this invention are as follows: by encrypting and decoding the radio frequency identification (RFID) signal, the security and accuracy of RFID are improved; by performing anti-signal collision optimization processing, the efficiency of RFID is improved, and the effectiveness of signal transmission is enhanced.

[0065] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0066] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0067] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0068] Figure 1 This is a module diagram of a high-performance reader / writer module based on an radio frequency chip according to an embodiment of the present invention;

[0069] Figure 2 This is a module diagram of the communication module in an embodiment of the present invention;

[0070] Figure 3 This is a module diagram of the radio frequency module in an embodiment of the present invention;

[0071] Figure 4 This is a block diagram of the read / write control module in an embodiment of the present invention;

[0072] Figure 5 This is a module diagram of the read / write optimization module in an embodiment of the present invention;

[0073] Figure 6 This is a hardware structure diagram of the high-performance reader / writer in an embodiment of the present invention. Detailed Implementation

[0074] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0075] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0076] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0077] Furthermore, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. "Multiple" means two or more, unless otherwise expressly specified. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0079] Example 1:

[0080] according to Figure 1 As shown, this embodiment of the invention provides a high-performance reader / writer module based on an RFID chip, including: a communication module: used to detect RFID tags within a preset range and obtain the real-time location information of the RFID tags through a reader / writer device; wherein,

[0081] Radio frequency module: Used to perform radio frequency modulation on a preset initial signal using the location information of the radio frequency chip and the radio frequency tag to generate a radio frequency signal;

[0082] Read / write control module: used to encrypt and decode radio frequency signals through the radio frequency chip, and read the corresponding radio frequency tags to generate radio frequency data;

[0083] Read / write optimization module: used to perform anti-signal collision optimization processing on the radio frequency signal transmission based on the radio frequency data.

[0084] The working principle of the above technical solution is as follows: In the existing technical solution, when reading and writing to multiple targets, the signal strength is usually enhanced by strengthening the signal antenna in the reader to improve the speed of receiving and transmitting. However, this conventional technology cannot meet the needs of the increasingly large number of users, especially when there are many reading and writing targets that are scattered. Signal collisions are likely to occur during the reading process.

[0085] In the technical solution of this invention, a reading and writing device is used to detect radio frequency tags within a preset range, obtain their location information, modulate the initial signal into a radio frequency signal, read the radio frequency tag through encryption and decoding, generate radio frequency data, and perform anti-signal collision optimization processing on the radio frequency signal transmission. That is, the signal is transmitted through different signal channels, or different signals are filtered or the transmission period of different signals is determined, and the signal is optimized by receiving signals according to the period interval.

[0086] In practical implementation: We apply this invention to engineering vehicles. Engineering vehicles typically require multiple mobile auxiliary devices to operate at night. By setting RFID tags for these mobile auxiliary devices, when the auxiliary devices begin to move around the engineering vehicle, the engineering vehicle can obtain the location information of the auxiliary devices using the reader module of this invention. Through the RFID module, an RFID signal is generated to comprehensively identify and read the RFID tags of each auxiliary device, and finally transmit the signal. Anti-signal collision optimization processing is also performed. By detecting preset RFID tags, dangerous locations can be avoided.

[0087] The beneficial effects of the above technical solution are as follows: by encrypting and decoding the radio frequency identification (RFID), the security and accuracy of RFID are improved; by performing anti-signal collision optimization processing, the efficiency of RFID is improved, and the effectiveness of signal transmission is enhanced.

[0088] according to Figure 2 As shown, the communication module of the present invention includes:

[0089] Tag detection unit: used to determine the monitoring range of the read / write device, collect tag signals within the monitoring range, and determine the pre-identified tag signal; wherein,

[0090] The read / write device consists of a reader antenna 4, an RF chip 1, an RF interference filter 2, an RF receiver 5, an RF power amplifier 6, and a coupler 7; as shown in the attached diagram. Figure 6 As shown, attached Figure 6 It is an 8-channel reader module that can connect to eight different antennas to read eight different signals. 3 belongs to the encoder, which performs the encoding work.

[0091] Tag distribution unit: used to determine the distribution information of the pre-identified tag signal within a preset range based on the pre-identified tag signal; wherein,

[0092] The distribution information includes: single-tag signal distribution information and multi-tag signal distribution information;

[0093] Tag identification unit: used to determine the real-time location information of the pre-identified tag signal based on the distribution information.

[0094] The working principle of the above technical solution is as follows:

[0095] The communication module of this invention includes a tag detection unit, a tag distribution unit, and a tag recognition unit. The tag detection unit, based on a preset reading and writing device, detects tag signals within a preset range (monitoring range) in real time and acquires pre-identified tag signals. Tag signals can be acquired through the reader antenna of the reading and writing device. These tag signals are used to classify signals transmitted by different reading and writing targets. The reading and writing device includes at least a reader antenna, an RF chip, and a coupler. The reader antenna receives signals, the RF chip transmits signals, and the coupler couples the signals. The tag distribution unit determines the distribution of pre-identified tag signals within the preset range based on the pre-identified tag signals within that range. Since tag signals exist in different regions or areas in real-world scenarios, and are not fixedly divided due to different altitudes and environmental influences, their distribution may be uneven. Obtaining their distribution information is necessary to generate corresponding strategy analysis. The pre-identified tag signal distribution includes single tag signal distribution and multi-tag signal distribution. Single tag signal distribution mainly refers to the distribution location of a single tag signal, while multi-tag signal distribution mainly refers to the distribution location of multiple tag signals. Based on the pre-identified tag signal distribution, the tag recognition unit obtains the location information of the pre-identified tag signals. By obtaining the location information of the pre-identified tag signals, raw materials are provided for the generation of tag recognition strategies.

[0096] The beneficial effects of the above technical solution are as follows:

[0097] The communication module of this technical solution is used to receive and transmit signals emitted by the read / write target through the reader antenna, radio frequency chip and coupler of the read / write device. By reading the positions of different read / write targets, the position accuracy of the read / write targets is improved, and the signal transmission and reception of the read / write targets can be more accurately identified.

[0098] The tag recognition unit of the present invention includes:

[0099] Tag strategy subunit: used to set distribution strategy rules and generate corresponding tag recognition strategies based on the distribution information and different tag distribution data in the preset distribution strategy database;

[0100] Tag recognition subunit: used to establish a distribution map of the pre-identified tag signal using the tag recognition strategy, and to determine the real-time location information of the tag signal using the distribution map; wherein,

[0101] When the pre-identified tag signal is a single tag signal distribution, the radio frequency tag information in the tag signal is directly identified;

[0102] When the pre-identified tag signal is a multi-tag signal distribution, the radio frequency tag information in the tag signal is identified sequentially according to the signal strength corresponding to the tag signal;

[0103] The identification methods for the pre-identified tag signals include: static identification and dynamic identification.

[0104] The working principle of the above technical solution is as follows:

[0105] The tag identification unit of this technical solution includes a tag strategy subunit and a tag identification subunit. The tag strategy subunit performs distribution analysis based on the pre-identified tag signal distribution and the distribution data in the preset distribution strategy database to generate distribution maps of different signal locations and generate corresponding tag identification strategies. This is mainly based on the tag strategy rules to generate the identification strategy. The strategy rules are mainly based on the number of signals and the signal strength, such as a rule from strong to weak signal strength. Different strategy analyses are required for different distributions of tag signals. Static identification is sufficient for locations with strong signal strength, while dynamic identification is required for locations with weak signal strength. The tag identification subunit performs tag identification on the pre-identified tag signals based on the tag identification strategy to obtain the location information of the tag signals. When the pre-identified tag distribution is a single tag signal distribution, the RFID tags in the tag signals are directly identified. The RFID tags are read through the signal distribution of a single tag. When the pre-identified tag distribution is a multi-tag signal distribution, the RFID tags in the tag signals are identified sequentially according to the signal strength of the tag signals. Tag identification includes static tag identification and dynamic tag identification.

[0106] The beneficial effects of the above technical solution are as follows:

[0107] This invention uses different tag recognition strategies to identify reading and writing targets in different ways, thereby improving recognition efficiency and providing a flexible recognition method.

[0108] As attached Figure 3 As shown, the radio frequency submodule of the present invention includes:

[0109] Radio frequency interface unit: used to generate an initial signal through the radio frequency receiver and voltage regulator;

[0110] Radio frequency (RF) conditioning unit: used to adjust the initial current corresponding to the initial signal through the voltage regulator and RF chip, and generate RF current.

[0111] Radio frequency coupling unit: used to frequency modulate the initial signal through the coupler and radio frequency current to generate a radio frequency signal.

[0112] The working principle of the above technical solution is as follows:

[0113] The radio frequency (RF) submodule of this technical solution includes an RF interface unit, an RF conditioning unit, and an RF coupling unit. The RF interface unit generates an initial signal based on an RF receiver and a voltage regulator. Through the RF receiver and voltage regulator, the signal can be regulated during signal reception to obtain a clearer initial signal. The RF conditioning unit adjusts the initial current corresponding to the initial signal based on the voltage regulator and the RF chip to generate an RF current. The RF coupling unit modulates the initial signal based on a preset coupler and the RF current to generate an RF signal. Through the coupler, the signal is frequency-modulated to obtain a clearer, amplified signal by adjusting the frequency of signals with jitter or high or low noise.

[0114] The beneficial effects of the above technical solution are as follows:

[0115] This invention obtains a clear, processed radio frequency signal by frequency modulation of the signal, and the obtained signal is easier to identify compared with the prior art.

[0116] The read / write control module of this invention includes:

[0117] Encoding unit: Based on the encoding instructions issued by the RF chip, it performs preset encryption encoding on the RF signal to generate an encrypted RF signal; wherein,

[0118] The encryption encoding includes: source encryption encoding and channel encryption encoding;

[0119] Encoding unit: used to issue encoding instructions through the radio frequency chip to encrypt and encode the radio frequency signal, generating an encrypted radio frequency signal; wherein,

[0120] The encryption encoding includes: source encryption encoding and channel encryption encoding;

[0121] Reading unit: used to transmit the encrypted radio frequency signal to the radio frequency tag within a preset range according to the radio frequency chip and the reader antenna, and to read the signal from the radio frequency tag to generate a radio frequency reading signal;

[0122] Decoding unit: used to receive the radio frequency reading signal corresponding to the radio frequency tag through the reader antenna and radio frequency chip, decode the radio frequency reading signal, and generate a decoded signal;

[0123] Amplification unit: used to amplify the decoded radio frequency signal through the radio frequency power amplifier and radio frequency chip to generate an amplified radio frequency signal, and to convert the amplified radio frequency signal to generate radio frequency data.

[0124] The working principle of the above technical solution is as follows:

[0125] The read / write control submodule of this invention includes an encoding unit, a reading unit, a decoding unit, and an amplification unit. The encoding unit issues encoding instructions based on the RF chip to perform preset encryption encoding on the RF signal, generating an encrypted RF signal. The encryption method can be varied, primarily based on a user-defined encryption program. Encrypting the RF signal ensures it is not intercepted or stolen. The encryption encoding includes source encryption encoding and channel encryption encoding. The reading unit, based on the RF chip and reader antenna, transmits the encrypted RF signal to RF tags within a preset range and performs RF reading on the RF tags, generating an RF reading signal. Based on the encrypted signal, the decoding unit, based on the reader antenna and RF chip, receives the RF reading signal corresponding to the RF tag, encrypts and decodes the RF reading signal, generating a decoded RF signal. Through a preset decryption mechanism, the decrypted RF signal is obtained, improving signal security. The amplification unit, based on a preset RF power amplifier and RF chip, amplifies the decoded RF signal, generating an amplified RF signal. The amplified RF signal undergoes signal conversion to generate RF data. Through signal amplification and Fourier transform processing, corresponding data is generated to facilitate reference to variable factors in the signal.

[0126] The beneficial effects of the above technical solution are as follows:

[0127] The read / write control submodule of this invention encrypts and parses during the read / write process, thereby ensuring security when transmitting signals between ports and reducing the risk of information being intercepted or stolen.

[0128] The radio frequency coupling unit of the present invention includes:

[0129] Frequency modulation subunit: used to control the coupler and RF current through the RF chip to generate a preprocessed signal;

[0130] De-interference subunit: used to perform de-interference processing on the preprocessed signal through the radio frequency interference filter to generate a de-interference signal;

[0131] Radio frequency amplification subunit: used to control the radio frequency power amplifier through the radio frequency chip to amplify the interference removal signal and generate a radio frequency signal.

[0132] The working principle and beneficial effects of the above technical solution are as follows:

[0133] The radio frequency coupling unit of this invention includes a frequency modulation subunit, an interference removal subunit, and a radio frequency amplification subunit. The frequency modulation subunit controls the coupler and radio frequency current based on the radio frequency chip to generate a pre-processed signal. The radio frequency current is pre-processed through the coupler, and noise is removed, thereby generating a corresponding processed signal. The interference removal subunit performs interference removal processing on the pre-processed signal based on a preset radio frequency interference filter to generate an interference removal signal. Interference factors are eliminated and removed. The radio frequency amplification subunit controls the radio frequency power amplifier based on the radio frequency chip to amplify the interference removal signal and generate a radio frequency signal. Obvious patterns can be deduced from the radio frequency signal to facilitate information conversion.

[0134] Example 7:

[0135] The read / write optimization module of this invention includes:

[0136] Collision detection unit: used to perform radio frequency signal collision detection through the radio frequency chip and reader antenna, and to obtain the detection results; wherein,

[0137] If the detection result indicates that there is no radio frequency signal collision, then the radio frequency signal is sent directly;

[0138] When the detection result indicates the presence of radio frequency signal collision, radio frequency signal segmentation is performed;

[0139] Collision analysis unit: used to identify the frequency of the radio frequency signal by dividing it into radio frequency chips and radio frequency signals, and to determine the signal category of the radio frequency signal;

[0140] Collision optimization unit: Based on the RF chip and signal type, generates an anti-collision strategy and performs anti-collision processing according to the anti-collision optimization strategy; wherein...

[0141] The anti-collision optimization strategy includes a multi-signal channel transmission strategy, an interval signal reception strategy, and a signal filtering and classification strategy.

[0142] The working principle of the above technical solution is as follows:

[0143] The read / write optimization submodule of this invention includes a collision detection unit, a collision analysis unit, and a collision optimization unit. The collision detection unit performs radio frequency (RF) collision detection based on the RF chip and reader antenna, and generates a judgment result. Through collision detection, the efficiency, timeliness, and timeliness of the signal transmission channel can be satisfied. When the judgment result indicates no RF collision, the RF signal is directly transmitted; when the judgment result indicates an RF collision, RF collision analysis is performed to avoid collisions. The collision analysis unit performs RF collision identification based on the RF chip and RF data, generating RF collision categories, including: multi-tag collisions and reader tag collisions. Different collision categories require... To perform different processing methods, the collision optimization unit analyzes anti-collision optimization schemes based on the RF chip and RF collision categories, generates anti-collision optimization strategies, and performs anti-collision processing according to the anti-collision optimization strategies. The strategies of this invention include a multi-signal channel transmission strategy (establishing signal transmission channels of different frequencies), an interval signal reception strategy (receiving signals at intervals according to the signal transmission period, thereby obtaining a more complete signal and filtering out signals outside the period), and a signal filtering and classification strategy (filtering signals of different frequencies, leaving only the target signal; when there are multiple target signals, it can be combined with the multi-channel strategy, with each channel receiving signals of different frequencies and filtering other signals).

[0144] The beneficial effects of this invention are as follows:

[0145] This technical solution improves signal transmission efficiency, increases signal transmission speed, and reduces signal transmission time through anti-collision processing.

[0146] The collision optimization unit of the present invention includes:

[0147] Monitoring subunit: used to monitor the carrier waves of several preset assisting chips through the radio frequency chip and the reader antenna, and to acquire monitoring data;

[0148] The monitoring and judgment subunit is used to perform monitoring and judgment based on the monitoring data and generate a monitoring and judgment result; wherein...

[0149] When the monitoring result indicates that an assisting chip is transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip will pause the transmission of radio frequency signals until the assisting chip completes the transmission.

[0150] When the monitoring judgment result indicates that there is no assisting chip transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip transmits radio frequency signals and performs transmission judgment.

[0151] Transmission Judgment Subunit: When the RF chip transmits an RF signal to the RF tag, it determines whether an RF read signal is received within a preset transmission time. If the reception is successful, the RF read signal is encrypted and decoded; otherwise, the RF signal is transmitted to the tag signal again.

[0152] The preset transmission time includes: the round-trip transmission time of the radio frequency signal to the radio frequency tag, and the reading time of the tag signal.

[0153] The working principle of the above technical solution is as follows:

[0154] The collision optimization unit of this invention includes a listening subunit, a listening judgment subunit, and a transmission judgment subunit. The listening subunit performs carrier listening on a preset number of assisting chips (the assisting chips are chips in different devices when the reader module of this invention is installed in different devices; these devices' chips are connected to the RF chip of this invention to assist the RF chip in signal reception) based on the RF chip and reader antenna, acquires listening data, and raises the priority of the assisting chips to before the RF chip, thereby satisfying the chip's data listening priority. The listening judgment subunit performs listening judgment based on the listening data and generates a listening judgment result. When the listening judgment result indicates that an assisting chip is transmitting in the RF channel corresponding to the RF chip, then... The RF chip pauses the transmission of RF signals until the assisting chip completes the transmission. The assisting chip can prioritize the transmission of signals already received. When the monitoring and judgment result indicates that the assisting chip is not transmitting in the RF channel corresponding to the RF chip, the RF chip transmits the RF signal and performs a transmission judgment. When the RF chip transmits the RF signal to the tag signal, the transmission judgment subunit determines whether an RF reading signal is received within a preset transmission time. If received, the RF reading signal is encrypted and decoded; otherwise, the RF signal is transmitted to the tag signal again. The preset transmission time includes the round-trip transmission time of the RF signal to the tag signal and the reading time of the tag signal. Time calculation is used to improve the efficiency of information transmission.

[0155] The beneficial effects of the above technical solution are as follows:

[0156] This technical solution will help to raise the priority of the chip to before that of the radio frequency chip, thereby satisfying the chip's data listening priority and improving the efficiency of information transmission through time calculation.

[0157] The read / write optimization module of the present invention further includes:

[0158] Signal stabilization unit: used to calculate the signal frequency deviation θ(x) corresponding to the radio frequency signal, wherein the signal frequency deviation is within the signal deviation rate threshold: where,

[0159]

[0160] Where, θ * Let μ(x) be the signal phase influence function caused by instability factors, where x is the instability factor and x is a variable. The initial frequency is fixed. Take the partial derivative of the signal phase influence function with respect to the instability factor, where k is the signal deviation threshold; Indicates the signal deviation rate threshold;

[0161] Transmission loss variance unit: used to calculate the transmission loss variance of the radio frequency signal based on the signal frequency deviation and the acquired radio frequency deviation data set;

[0162] Optimization processing unit: used to make read / write decisions based on the transmission loss variance of the radio frequency signal; wherein,

[0163] When the transmission loss variance is within a preset threshold range, read and write operations continue; when the transmission loss variance is outside the preset threshold range, radio frequency signal filtering is performed, and the target radio frequency signal is determined after signal filtering; wherein,

[0164] The radio frequency signal filtering is used to determine the target signal frequency threshold of the target radio frequency signal through the signal deviation rate threshold, and to perform signal filtering based on the target signal frequency threshold.

[0165] The working principle of this invention is as follows: by analyzing the influence of unstable factors within the range through the signal stabilization unit, the signal frequency deviation corresponding to the radio frequency signal is calculated. Then, by using the transmission loss variance unit and the signal frequency deviation and the acquired radio frequency deviation data set, the transmission loss variance of the radio frequency signal is calculated. Finally, based on the transmission loss variance of the radio frequency signal, a read / write judgment is performed to generate a judgment result.

[0166] The beneficial effects of the above technical solution are: by calculating the loss variance, the efficiency and transmission effectiveness of radio frequency signal transmission are improved.

[0167] The transmission loss variance unit of the present invention further includes:

[0168] RF bias subunit: used to calculate the RF bias based on the signal frequency bias θ(x) and the acquired RF bias data set.

[0169]

[0170] Where t is the average transmission time of the radio frequency signal. Let θ(x) be the RF deviation corresponding to the t-th data point in the RF deviation data set with an average transmission time of t, where y is a variable and 1 ≤ y, x is a variable and y ≤ x ≤ y + t, and θ(x) represents the signal frequency deviation. * The initial fixed frequency;

[0171] Transmission loss variance subunit: based on the aforementioned RF deviation Determine the corresponding average RF deviation And calculate the variance of the transmission loss of the radio frequency signal under the stable frequency condition with an average transmission time of t.

[0172]

[0173] Where ω is the number of RF deviation data points, and ε is the loss coefficient. Let be the RF deviation corresponding to the (n+1)th data in the RF deviation data set when the average transmission time is t.

[0174] The working principle of this invention is as follows: First, the radio frequency deviation is calculated based on the signal frequency deviation and the acquired radio frequency deviation data set; second, the transmission loss variance of the radio frequency signal is calculated based on the radio frequency deviation and the corresponding average radio frequency deviation.

[0175] The beneficial effects of this invention are: by analyzing radio frequency deviation, transmission loss can be reduced and signal accuracy can be improved.

[0176] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0177] This 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 block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0178] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0179] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0180] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-performance reader / writer module based on an radio frequency chip, characterized in that: include: Communication module: used to detect RFID tags within a preset range and obtain their real-time location information via a reader / writer; wherein, Radio frequency module: Used to perform radio frequency modulation on a preset initial signal using the location information of the radio frequency chip and the radio frequency tag to generate a radio frequency signal; Read / write control module: used to encrypt and decode radio frequency signals through the radio frequency chip, and read the corresponding radio frequency tags to generate radio frequency data; Read / write optimization module: used to perform anti-collision optimization processing on the radio frequency signal transmission based on the radio frequency data; The read / write optimization module also includes: Signal stabilization unit: used to calculate the signal frequency deviation corresponding to the radio frequency signal. The signal frequency deviation is within the signal deviation rate threshold: where, ； in, For an initial fixed frequency, The signal phase influence function caused by unstable factors. As an unstable factor, As variables, Take the partial derivative of the signal phase influence function with respect to the instability factor. This is the signal deviation threshold; Indicates the signal deviation rate threshold range; Transmission loss variance unit: used to calculate the transmission loss variance of the radio frequency signal based on the signal frequency deviation and the acquired radio frequency deviation data set; Optimization processing unit: used to make read / write decisions based on the transmission loss variance of the radio frequency signal; wherein, When the transmission loss variance is within a preset threshold range, read and write operations continue; when the transmission loss variance is outside the preset threshold range, radio frequency signal filtering is performed, and the target radio frequency signal is determined after signal filtering; wherein, The radio frequency signal filtering is used to determine the target signal frequency threshold of the target radio frequency signal through the signal deviation rate threshold, and to perform signal filtering based on the target signal frequency threshold; The transmission loss variance unit further includes: RF deviation subunit: used to adjust the frequency deviation of the signal. Calculate the radio frequency deviation using the acquired radio frequency deviation data set. : ； in, This represents the average transmission time corresponding to the radio frequency signal. In order to achieve an average transmission time of At that time, the first in the RF bias data group The radio frequency deviation corresponding to each data point As a variable, and , As a variable, and ; Indicates signal frequency deviation; The initial fixed frequency; Transmission loss variance subunit: based on the aforementioned RF deviation Determine the corresponding average RF deviation And calculate the average transmission time as Under stable frequency conditions, the variance of transmission loss of radio frequency signals : ； in, The number of radio frequency deviation data. The loss coefficient is... In order to achieve an average transmission time of At that time, the first in the RF bias data group The radio frequency deviation corresponding to each data point.

2. The high-performance reader / writer module based on an RF chip as described in claim 1, characterized in that, The communication module includes: Tag detection unit: used to determine the monitoring range of the read / write device, collect tag signals within the monitoring range, and determine the pre-identified tag signal; wherein, The read / write device consists of a reader antenna, an RF chip, an RF interference filter, an RF receiver, an RF power amplifier, and a coupler. Tag distribution unit: used to determine the distribution information of the pre-identified tag signal within a preset range based on the pre-identified tag signal; wherein, The distribution information includes: single-tag signal distribution information and multi-tag signal distribution information; Tag identification unit: used to determine the real-time location information of the pre-identified tag signal based on the distribution information.

3. The high-performance reader / writer module based on an RF chip as described in claim 2, characterized in that, The label recognition unit includes: Tag strategy subunit: used to set distribution strategy rules and generate corresponding tag recognition strategies based on the distribution information and different tag distribution data in the preset distribution strategy database; Tag recognition subunit: used to establish a distribution map of the pre-identified tag signal using the tag recognition strategy, and to determine the real-time location information of the tag signal using the distribution map; wherein, When the pre-identified tag signal is a single tag signal distribution, the radio frequency tag information in the tag signal is directly identified; When the pre-identified tag signal is a multi-tag signal distribution, the radio frequency tag information in the tag signal is identified sequentially according to the signal strength corresponding to the tag signal; The identification methods for the pre-identified tag signals include: static identification and dynamic identification.

4. The high-performance reader / writer module based on an RF chip as described in claim 2, characterized in that, The radio frequency module includes: Radio frequency interface unit: used to generate an initial signal through the radio frequency receiver and voltage regulator; Radio frequency (RF) conditioning unit: used to adjust the initial current corresponding to the initial signal through the voltage regulator and RF chip, and generate RF current. Radio frequency coupling unit: used to frequency modulate the initial signal through the coupler and radio frequency current to generate a radio frequency signal.

5. A high-performance reader / writer module based on an RF chip as described in claim 2, characterized in that, The read / write control module includes: Encoding unit: used to issue encoding instructions through the radio frequency chip to encrypt and encode the radio frequency signal, generating an encrypted radio frequency signal; wherein, The encryption encoding includes: source encryption encoding and channel encryption encoding; Reading unit: used to transmit the encrypted radio frequency signal to the radio frequency tag within a preset range according to the radio frequency chip and the reader antenna, and to read the signal from the radio frequency tag to generate a radio frequency reading signal; Decoding unit: used to receive the radio frequency reading signal corresponding to the radio frequency tag through the reader antenna and radio frequency chip, decode the radio frequency reading signal, and generate a decoded radio frequency signal; Amplification unit: used to amplify the decoded radio frequency signal through the radio frequency power amplifier and radio frequency chip to generate an amplified radio frequency signal, and to convert the amplified radio frequency signal to generate radio frequency data.

6. The high-performance reader / writer module based on an RF chip as described in claim 4, characterized in that, The radio frequency coupling unit includes: Frequency modulation subunit: used to control the coupler and RF current through the RF chip to generate a preprocessed signal; De-interference subunit: used to perform de-interference processing on the preprocessed signal through the radio frequency interference filter to generate a de-interference signal; Radio frequency amplification subunit: used to control the radio frequency power amplifier through the radio frequency chip to amplify the interference removal signal and generate a radio frequency signal.

7. A high-performance reader / writer module based on an RF chip as described in claim 2, characterized in that, The read / write optimization module includes: Collision detection unit: used to perform radio frequency signal collision detection through the radio frequency chip and reader antenna, and to obtain the detection results; wherein, If the detection result indicates that there is no radio frequency signal collision, then the radio frequency signal is sent directly; When the detection result indicates the presence of radio frequency signal collision, radio frequency signal segmentation is performed; Collision analysis unit: used to identify the frequency of the radio frequency signal by dividing it into radio frequency chips and radio frequency signals, and to determine the signal category of the radio frequency signal; Collision optimization unit: Based on the RF chip and signal type, generates an anti-collision optimization strategy, and performs anti-collision processing according to the anti-collision optimization strategy; wherein... The anti-collision optimization strategy includes a multi-signal channel transmission strategy, an interval signal reception strategy, and a signal filtering and classification strategy.

8. A high-performance reader / writer module based on an RF chip as described in claim 7, characterized in that, The collision optimization unit includes: Monitoring subunit: used to monitor the carrier waves of several preset assisting chips through the radio frequency chip and the reader antenna, and to acquire monitoring data; The monitoring and judgment subunit is used to perform monitoring and judgment based on the monitoring data and generate a monitoring and judgment result; wherein... When the monitoring result indicates that an assisting chip is transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip will pause the transmission of radio frequency signals until the assisting chip completes the transmission. When the monitoring judgment result indicates that there is no assisting chip transmitting data in the radio frequency channel corresponding to the radio frequency chip, the radio frequency chip transmits radio frequency signals and performs transmission judgment. Transmission Judgment Subunit: When the RF chip transmits an RF signal to the RF tag, it determines whether an RF read signal is received within a preset transmission time. If the reception is successful, the RF read signal is encrypted and decoded; otherwise, the RF signal is transmitted to the tag signal again. The preset transmission time includes: the round-trip transmission time of the radio frequency signal to the radio frequency tag, and the reading time of the tag signal.

Images