A method for detecting anti-interference performance of RFID tag antenna

Abstract

The present invention discloses a method for detecting the anti-interference performance of an RFID tag antenna, which relates to the technical field of performance detection, including: constructing a sample of the number of nodes of a multipath propagation line; setting a first anti-interference detection sample and a second anti-interference detection sample; determining the coverage of the RFID tag, performing multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample, and outputting a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection sample; inputting the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, analyzing them according to the anti-interference evaluation module, and outputting the anti-interference detection index of the RFID tag. The present invention solves the technical problem that the prior art lacks systematic detection of the anti-interference performance of the RFID tag antenna, and achieves the technical effect of comprehensively analyzing and evaluating the performance of the RFID tag antenna under different interference conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of performance detection, and in particular to a method for detecting the anti-interference performance of an RFID tag antenna. Background Art

[0002] RFID technology is widely used in logistics management, item tracking, asset management and other fields. Through wireless communication between RFID tags and readers, it realizes automatic identification of item information and data exchange. The performance of RFID system depends largely on the design of RFID tag antenna and its anti-interference ability. Due to the complex and changeable actual application environment, the signal propagation process is often affected by a variety of interference factors, resulting in significant impact on the performance indicators of RFID system such as reading success rate, reading distance and reading time. Therefore, it is particularly important to evaluate and improve the anti-interference performance of RFID tag antenna.

[0003] When the RFID system works in the actual environment, the signal will encounter various obstacles, such as walls, metal racks, goods, etc., causing the signal to be reflected, refracted and scattered. These multipath propagation effects will cause changes in the signal phase, amplitude and propagation path, ultimately affecting the reading performance of the RFID system.

[0004] In order to effectively evaluate the anti-interference performance of RFID tag antennas in complex environments, a scientific and reasonable detection method needs to be established. The existing technology lacks a systematic anti-interference performance detection method and cannot fully reflect the performance of RFID tag antennas under various interference conditions. Summary of the invention

[0005] The present application provides a method for detecting the anti-interference performance of an RFID tag antenna, which is used to solve the technical problem that the prior art lacks systematic detection of the anti-interference performance of an RFID tag antenna.

[0006] In view of the above problems, the present application provides a method for detecting the anti-interference performance of an RFID tag antenna.

[0007] The present application provides a method for detecting the anti-interference performance of an RFID tag antenna, the method comprising:

[0008] Construct a node number sample of a multipath propagation line; based on the node number sample, set a first anti-interference detection sample, the first anti-interference detection sample is a detection sample with the same medium set under different node number samples; based on the node number sample, set a second anti-interference detection sample, the second anti-interference detection sample is a detection sample with different media set under different node number samples; determine the coverage of the RFID tag, within the coverage of the RFID tag, perform multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample, and output a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection sample, wherein each group of performance test samples includes a reading success rate, a reading distance and a reading time; input the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, analyze them according to the anti-interference evaluation module, and output the anti-interference detection index of the RFID tag.

[0009] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0010] The present application constructs a node number sample of a multipath propagation line; based on the node number sample, sets a first anti-interference detection sample, the first anti-interference detection sample is a detection sample of the same medium set under different node number samples; based on the node number sample, sets a second anti-interference detection sample, the second anti-interference detection sample is a detection sample of different media set under different node number samples; determines the coverage range of the RFID tag, within the coverage range of the RFID tag, performs multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample, outputs a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection sample, wherein each group of performance test samples includes a reading success rate, a reading distance and a reading time; inputs the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, performs analysis according to the anti-interference evaluation module, and outputs the anti-interference detection index of the RFID tag. The present invention solves the technical problem that the prior art lacks systematic detection of the anti-interference performance of RFID tag antennas. By constructing a node quantity sample of a multipath propagation line, setting an anti-interference detection sample, determining the coverage range of the RFID tag, performing multiple reading tests and performing anti-interference evaluation, the present invention achieves the technical effect of comprehensively analyzing and evaluating the performance of RFID tag antennas under different interference conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 A schematic diagram of a flow chart of a method for detecting the anti-interference performance of an RFID tag antenna provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of a flow chart of propagation performance analysis in a method for detecting anti-interference performance of an RFID tag antenna provided in an embodiment of the present application. DETAILED DESCRIPTION

[0014] The present application provides a method for detecting the anti-interference performance of an RFID tag antenna, which is used to solve the technical problem that the prior art lacks systematic detection of the anti-interference performance of an RFID tag antenna. By constructing a sample of the number of nodes in a multipath propagation line, setting an anti-interference detection sample, determining the coverage range of the RFID tag, performing multiple reading tests, and performing anti-interference evaluation, the technical effect of comprehensively analyzing and evaluating the performance of the RFID tag antenna under different interference conditions is achieved.

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0016] It should be noted that any variations of the terms "include" and "have" are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or modules that are not explicitly listed or inherent to these processes, methods, products or devices.

[0017] Embodiment 1

[0018] like Figure 1 As shown, the present application provides a method for detecting the anti-interference performance of an RFID tag antenna, the method comprising:

[0019] Step S100: constructing a node quantity sample of a multipath propagation line.

[0020] In the embodiments of the present application, multipath propagation refers to the phenomenon that a wireless signal reaches a receiving end through multiple different paths, including direct paths, reflection paths, and refraction paths during transmission. This will cause phase difference and time delay of the signal at the receiving end, thereby affecting the signal quality. In order to evaluate the anti-interference performance of RFID tags in different environments, a sample of the number of nodes of a multipath propagation line is constructed.

[0021] Specifically, first determine the environment in which the signal propagates. For example, in an office environment, obtain the size, layout, and distribution of various objects in the office. Assume that the size of the office is 20 meters by 20 meters and the ceiling height is 3 meters. Next, identify and record all nodes that may affect signal propagation. These nodes can be physical obstacles (such as walls, furniture) or environmental factors (such as humidity, temperature changes). In the office example, walls, furniture, windows, and doors are all potential nodes. Specifically, there are 4 walls, 8 pieces of furniture (such as tables, chairs, and bookcases), 3 windows, and 2 doors in the office. Then select different numbers of nodes for sampling based on different experimental needs. For example, select samples containing 5 nodes, 10 nodes, and 15 nodes. For example, select a sample containing walls and some furniture, totaling 5 nodes. Select a sample containing all furniture and some windows, totaling 10 nodes. Select a sample containing all nodes, totaling 15 nodes.

[0022] After selecting the nodes, record the location and properties (such as material, shape) of each node. For example, there are 4 walls made of concrete; the furniture includes 3 wooden tables, 5 metal chairs, and 3 wooden bookcases; there are 3 windows made of glass; and there are 2 doors made of wood.

[0023] Through the above steps, a node number sample of the multipath propagation line is constructed.

[0024] Step S200: Based on the node quantity sample, a first anti-interference detection sample is set, where the first anti-interference detection sample is a detection sample of the same medium set under different node quantity samples.

[0025] In an embodiment of the present application, after constructing the node number samples of the multipath propagation line, a first anti-interference detection sample is set based on these samples. The first anti-interference detection sample refers to a detection sample that keeps the same medium under different node number samples. The medium here refers to the material or substance encountered during the signal propagation process, such as concrete walls, wooden furniture, metal objects, etc.

[0026] Specifically, samples with different numbers of nodes are selected and constructed. For example, samples containing 5 nodes, 10 nodes, and 15 nodes are selected. These node number samples represent multipath propagation environments with different degrees of complexity. Then, the same medium type and properties are set in each node number sample. For example, the medium in all node number samples is set to a concrete wall. No matter how the number of nodes changes, the medium encountered during signal propagation is always the same.

[0027] Step S300: Based on the node quantity sample, a second anti-interference detection sample is set, where the second anti-interference detection sample is a detection sample of different media set under different node quantity samples.

[0028] In an embodiment of the present application, a second anti-interference detection sample is set based on the node quantity sample. Specifically, samples of different numbers of nodes are constructed, for example, samples containing 5 nodes, 10 nodes, and 15 nodes are selected. Next, different medium types and attributes are set in each node quantity sample. Unlike the first anti-interference detection sample, the medium type in each node quantity sample is different here, ensuring that the medium type and attributes are different in each sample, that is, no matter how the number of nodes changes, the signal propagation medium type in the detection sample will be different.

[0029] The specific execution steps include selecting and building a sample with 5 nodes, which may include 1 concrete wall, 2 wooden tables, 1 metal shelf, and 1 glass window. In this way, the number of nodes is 5, but the media include concrete, wood, metal, and glass. Then, select and build a sample with 10 nodes, which may include 2 concrete walls, 3 wooden tables, 2 metal shelves, 2 glass windows, and 1 plastic object. In this sample, the media types are more diverse, including concrete, wood, metal, glass, and plastic. Finally, select and build a sample with 15 nodes, which may include 3 concrete walls, 4 wooden tables, 3 metal shelves, 3 glass windows, and 2 plastic objects. There are more types of media in this sample, and the media of each node is also different.

[0030] Through the above process, the setting of the second anti-interference detection sample is completed.

[0031] Step S400: Determine the coverage range of the RFID tag, and within the coverage range of the RFID tag, perform multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample, and output a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection samples, wherein each group of performance test samples includes a reading success rate, a reading distance, and a reading time.

[0032] In the embodiment of the present application, the coverage of the RFID tag is first determined. The coverage refers to the area where the RFID tag can be effectively read by the reader. To determine this range, the power and antenna position of the reader are adjusted, and tests are performed at different distances and angles to ensure that the coverage can reflect the usage conditions in the actual application scenario.

[0033] Next, within the determined coverage range, the RFID tag is read multiple times according to the first anti-interference detection sample and the second anti-interference detection sample. In order to simulate the multipath propagation effect in the actual scene, reflectors, absorbing materials and obstacles are set up in the test site. Reflectors can reflect signals and increase the signal path; absorbing materials can absorb part of the signal and reduce the signal strength; obstacles can block or scatter signals and increase the complexity of signal propagation.

[0034] During the test, the number of successful reads is recorded and the success rate is calculated. The read success rate is the ratio of the number of successful reads of RFID tags to the total number of attempts within a certain period of time. The RFID tags will be read at different distances and the maximum read distance will be recorded. The read distance is the farthest distance at which the reader can successfully read the RFID tag. The time required for each successful read of the RFID tag is recorded. The read time is the time it takes from the start of the read to the successful reading of the tag information.

[0035] Through multiple reading tests, a first group of performance test samples and a second group of performance test samples based on the anti-interference detection samples are output.

[0036] Step S500: inputting the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, performing analysis according to the anti-interference evaluation module, and outputting an anti-interference detection index of the RFID tag.

[0037] In an embodiment of the present application, the first group of performance test samples and the second group of performance test samples are input into the anti-interference evaluation module, which analyzes the reading success rate, reading distance and reading time of each group of samples and outputs the anti-interference detection index of the RFID tag.

[0038] The anti-interference evaluation module is an analysis tool specifically used to analyze and evaluate the performance of RFID systems under different interference conditions. When the first group of performance test samples and the second group of performance test samples are input into the anti-interference evaluation module, the input data is preprocessed in the anti-interference evaluation module, and then the key features are extracted in the anti-interference evaluation module, including the reading success rate, reading distance and reading time. Then, these features are analyzed using the preset evaluation model. When the evaluation model is constructed, sample data is obtained from the historical database, which includes RFID performance test data under different media and node quantity conditions, including reading success rate, reading distance and reading time. The sample data extracted from the historical database is selected and trained using a support vector machine, and the training of the evaluation model is completed through this process. The impact of different interference conditions on these indicators is evaluated through the evaluation model. Through the above process, the three indicators of reading success rate, reading distance and reading time are analyzed to generate the anti-interference detection indicators of the RFID tag.

[0039] Furthermore, the method provided in the application embodiment also includes:

[0040] Access a preset media library, and use ray tracing technology to establish reflection parameters and refraction parameters of signals on each medium in the preset media library; perform propagation performance analysis on each medium in the preset media library based on the reflection parameters and the refraction parameters, and output propagation performance indicators of each medium; divide the preset media library into media based on the size of the propagation performance indicators of each medium, and obtain N media selection areas; set a first anti-interference detection sample and a second anti-interference detection sample in the N media selection areas.

[0041] In an embodiment of the present application, a preset media library is first accessed, and ray tracing technology is used to establish the reflection parameters and refraction parameters of the signal on various media. The preset media library is a database containing information about various media, including concrete walls, wooden furniture, metal objects, glass windows, etc. Ray tracing technology is used to simulate the propagation path of wireless signals in different media. Through ray tracing technology, the reflection parameters and refraction parameters of the signal on each medium are calculated. The reflection parameter describes the intensity and direction of the signal being reflected when encountering the surface of the medium; the refraction parameter describes the deflection and attenuation of the signal when it passes through the medium. Through historical data, a reflection and refraction parameter model is established for each medium.

[0042] Next, the propagation performance index of each medium is calculated based on the reflection parameters and refraction parameters. The methods used include characteristic calculation and statistical analysis. The propagation performance indicators include free space propagation loss, reflection loss and absorption loss. Free space propagation loss describes the power attenuation of the signal when it propagates in free space, reflection loss describes the power loss when the signal is reflected on the surface of the medium, and absorption loss describes the power loss when the signal is absorbed when passing through the medium. Through the calculation and analysis of these indicators, the propagation performance data of each medium is obtained.

[0043] Then, the preset media library is divided into media based on the propagation performance index of each medium, and the similarity between the media is calculated according to the propagation performance index of each medium, and then a clustering algorithm such as K-means clustering is used to group similar media. In this way, the media library is divided into N media selection areas, each of which contains media with similar propagation performance.

[0044] After obtaining N media selection areas, set the first anti-interference detection sample and the second anti-interference detection sample in each media selection area. The first anti-interference detection sample is selected and configured from the node quantity samples of the same medium to ensure that the medium type and quantity in each sample are consistent. The specific steps include randomly selecting a certain number of nodes from each selection area and ensuring that the medium types of these nodes are the same. The second anti-interference detection sample is selected and configured from the node quantity samples of different media to ensure that the medium types and quantities in each sample are different. The specific steps include randomly selecting a certain number of nodes from each selection area and ensuring that the medium types of these nodes are different. Through these steps, anti-interference detection samples are set in N media selection areas.

[0045] Through the above process, the first anti-interference detection sample and the second anti-interference detection sample are set in N medium selection areas.

[0046] Furthermore, in the method provided in the embodiment of the application, the first anti-interference detection sample and the second anti-interference detection sample are set in the N medium selection areas, and further includes:

[0047] A medium is randomly selected from the N medium selection areas, and a first anti-interference detection sample is set; a medium is randomly selected from each medium selection area in the N medium selection areas, and a second anti-interference detection sample is set.

[0048] In the embodiment of the present application, after obtaining N media selection areas, the first anti-interference detection sample and the second anti-interference detection sample are set in these selection areas. First, a medium is randomly selected in each media selection area to set the first anti-interference detection sample. Then, a medium is randomly selected in each media selection area of ​​the N media selection areas to complete the setting of the second anti-interference detection sample, and each sample in the second anti-interference detection sample contains different media types and quantities.

[0049] Further, such as Figure 2 As shown, in the method provided in the embodiment of the application, the propagation performance analysis of each medium in the preset medium library is performed based on the reflection parameter and the refraction parameter as characteristics, and further includes:

[0050] According to the reflection parameter and the refraction parameter, the free space propagation loss and the reflection loss of each medium are obtained; according to the current propagation distance, the absorption loss of each medium is calculated; the propagation performance analysis is performed based on the free space propagation loss, the reflection loss and the absorption loss, and the propagation performance index of each medium is output.

[0051] In the embodiment of the present application, when obtaining the free space propagation loss and reflection loss of each medium according to the reflection parameter and the refraction parameter, the free space path loss formula is used to calculate the loss of the signal when propagating in free space. The reflection coefficient formula is used to calculate the loss of the signal when it is reflected on the surface of the medium.

[0052] Then, the absorption loss of each medium is calculated according to the current propagation distance, and the Beer-Lambert law is used to calculate the absorption loss of the signal when it propagates in the medium.

[0053] Finally, the free space propagation loss, reflection loss and absorption loss are combined to perform propagation performance analysis, and the propagation performance indicators of each medium are output.

[0054] Furthermore, in the method provided in the embodiment of the application, the propagation performance analysis is performed using the free space propagation loss, the reflection loss and the absorption loss, and the expression is as follows:

[0055]

[0056] Where TPL is the total path loss that characterizes the propagation performance of each medium, n is the number of media in the propagation path, is the free space propagation loss of the ith medium, is the reflection loss of the ith medium, α i d i is the absorption loss of the ith medium, d i is the propagation distance of the electromagnetic wave in the i-th medium, λ is the wavelength of the electromagnetic wave, n i-1 is the refractive index of the incident medium, n i is the refractive index of the reflecting medium, θ i is the incident angle, θ t is the refraction angle, α i is the absorption coefficient of the ith medium.

[0057] In an embodiment of the present application, when performing propagation performance analysis, the propagation performance indicators of each medium are obtained by substituting the aforementioned reflection loss, absorption loss, propagation distance, wavelength, refractive index of the incident medium, refractive index of the reflecting medium, angle of incidence, angle of refraction and absorption coefficient into the above expressions for calculation.

[0058] Furthermore, in the method provided in the embodiment of the application, the preset media library is divided into media based on the propagation performance index size of each medium, and further includes:

[0059] The average silhouette coefficient under different cluster numbers k is calculated by the silhouette coefficient; the optimal solution of the number of clusters is determined with the goal of maximizing the average silhouette coefficient; according to the optimal solution of the number of clusters, the preset media library is clustered to obtain N media selection areas, wherein the number of optimal solutions of the number of clusters is N.

[0060] In the embodiment of the present application, the average silhouette coefficient under different cluster numbers k is first calculated. The silhouette coefficient is an indicator for evaluating the clustering effect. It measures the compactness of a sample in the same cluster and the separation between different clusters. Specifically, for each sample i, the average distance a(i) from it to other samples in its cluster and the average distance b(i) from it to all samples in the nearest other clusters are calculated. The silhouette coefficient s(i) of sample i is as follows:

[0061]

[0062] By calculating the average silhouette coefficient of all samples under different k values ​​(number of clusters), the average silhouette coefficient corresponding to each k value is obtained. Next, the optimal solution for the number of clusters is determined with the goal of maximizing the average silhouette coefficient. Specifically, the k value that maximizes the average silhouette coefficient is selected as the optimal solution for the number of clusters. Then, based on the determined optimal solution for the number of clusters k, the K-means clustering algorithm is used to cluster the media in the preset media library. Through the above process, the preset media library is divided into N media selection areas, where N is equal to the optimal solution for the number of clusters.

[0063] Furthermore, in the method provided in the embodiment of the application, the first group of performance test samples and the second group of performance test samples are input into the anti-interference evaluation module, and further includes:

[0064] The first group of performance test samples and the second group of performance test samples are input into the anti-interference evaluation module for analysis to obtain interference-reading success rate influencing indicators, interference-reading distance influencing indicators, and interference-reading time influencing indicators; based on the interference-reading success rate influencing indicators, interference-reading distance influencing indicators, and interference-reading time influencing indicators, the anti-interference detection indicators of the RFID tag are output.

[0065] In an embodiment of the present application, when the first group of performance test samples and the second group of performance test samples are input into the anti-interference evaluation module for analysis, these samples are first pre-processed, including data cleaning, normalization and other operations to ensure the accuracy and comparability of the analysis results. Subsequently, using the built-in model, the data in the sample is deeply mined and analyzed, focusing on the correlation between interference factors (such as multipath propagation, medium difference) and RFID tag reading performance (reading success rate, reading distance, reading time). Through this analysis process, the anti-interference evaluation module generates interference-reading success rate influence index, interference-reading distance influence index and interference-reading time influence index.

[0066] Finally, the interference-reading success rate influencing index, interference-reading distance influencing index and interference-reading time influencing index are output as the anti-interference detection index of the RFID tag.

[0067] Furthermore, the method provided in the application embodiment also includes:

[0068] The coverage of the RFID tag is optimized by adjusting the power of the reader and the antenna position.

[0069] In the embodiments of the present application, when optimizing the coverage of the RFID tag, the coverage of the RFID tag can be expanded by increasing the transmission power of the reader, so that the tag can be read at a farther distance; by adjusting the height, tilt angle and direction of the antenna, the signal propagation path can be optimized and the interference of multipath effects and obstructions can be reduced. For example, installing the antenna at a higher position can reduce the influence of ground reflections and obstacles, while adjusting the tilt angle of the antenna can make the signal cover more areas.

[0070] Through the above methods, the coverage of RFID tags is optimized.

[0071] In the embodiments of the present application, in summary, the embodiments of the present application have at least the following technical effects:

[0072] The present application constructs a node number sample of a multipath propagation line; based on the node number sample, sets a first anti-interference detection sample, the first anti-interference detection sample is a detection sample of the same medium set under different node number samples; based on the node number sample, sets a second anti-interference detection sample, the second anti-interference detection sample is a detection sample of different media set under different node number samples; determines the coverage range of the RFID tag, within the coverage range of the RFID tag, performs multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample, outputs a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection sample, wherein each group of performance test samples includes a reading success rate, a reading distance and a reading time; inputs the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, performs analysis according to the anti-interference evaluation module, and outputs the anti-interference detection index of the RFID tag. The present invention solves the technical problem that the prior art lacks systematic detection of the anti-interference performance of RFID tag antennas. By constructing a node quantity sample of a multipath propagation line, setting an anti-interference detection sample, determining the coverage range of the RFID tag, performing multiple reading tests and performing anti-interference evaluation, the present invention achieves the technical effect of comprehensively analyzing and evaluating the performance of RFID tag antennas under different interference conditions.

[0073] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. The processes depicted in the accompanying drawings do not necessarily require the specific order and continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0075] This specification and the drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A method for detecting the anti-interference performance of an RFID tag antenna, characterized in that: The method comprises: Construct a sample of the number of nodes for multipath propagation lines; Based on the node quantity sample, a first anti-interference detection sample is set, where the first anti-interference detection sample is a detection sample of the same medium set under different node quantity samples; Based on the node quantity sample, a second anti-interference detection sample is set, where the second anti-interference detection sample is a detection sample of different media set under different node quantity samples; Determine the coverage range of the RFID tag, perform multiple reading tests on the RFID tag according to the first anti-interference detection sample and the second anti-interference detection sample within the coverage range of the RFID tag, and output a first group of performance test samples and a second group of performance test samples corresponding to the anti-interference detection samples, wherein each group of performance test samples includes a reading success rate, a reading distance, and a reading time; The first group of performance test samples and the second group of performance test samples are input into an anti-interference evaluation module, and the anti-interference evaluation module performs analysis to output an anti-interference detection index of the RFID tag.

2. The method according to claim 1, characterized in that The method further comprises: Accessing a preset medium library, and using ray tracing technology to establish reflection parameters and refraction parameters of the signal on each medium in the preset medium library; Performing propagation performance analysis on each medium in the preset medium library according to the reflection parameter and the refraction parameter as characteristics, and outputting propagation performance indicators of each medium; Dividing the preset media library into media based on the propagation performance index of each medium to obtain N media selection areas; A first anti-interference detection sample and a second anti-interference detection sample are set in the N medium selection areas.

3. The method according to claim 2, characterized in that The first anti-interference detection sample and the second anti-interference detection sample are set in the N medium selection areas, and the method includes: Randomly select a medium from the N medium selection areas and set a first anti-interference detection sample; A medium is randomly selected from each of the N medium selection areas, and a second anti-interference detection sample is set.

4. The method according to claim 2, characterized in that Performing propagation performance analysis on each medium in the preset medium library based on the reflection parameter and the refraction parameter as characteristics includes: Obtaining free space propagation loss and reflection loss of each medium according to the reflection parameter and the refraction parameter; According to the current propagation distance, calculate the absorption loss of each medium; Propagation performance analysis is performed based on the free space propagation loss, reflection loss and absorption loss, and propagation performance indicators of each medium are output.

5. The method according to claim 4, characterized in that The propagation performance analysis is performed based on the free space propagation loss, reflection loss and absorption loss, and the expression is as follows: ； in, is the total path loss that characterizes the propagation performance of each medium, n is the number of media in the propagation path, is the free space propagation loss of the ith medium, is the reflection loss of the ith medium, is the absorption loss of the ith medium, is the propagation distance of the electromagnetic wave in the i-th medium, is the wavelength of the electromagnetic wave, is the refractive index of the incident medium, is the refractive index of the reflecting medium, is the incident angle, is the refraction angle, is the absorption coefficient of the ith medium.

6. The method according to claim 2, characterized in that The preset media library is divided into media based on the propagation performance index of each medium, and the method further includes: The average silhouette coefficient under different cluster numbers k is calculated by the silhouette coefficient; Taking maximizing the average silhouette coefficient as the goal, determining the optimal solution for the number of clusters; According to the optimal solution for the number of clusters, media clustering is performed on the preset media library to obtain N media selection areas, wherein the number of the optimal solution for the number of clusters is N.

7. The method according to claim 1, characterized in that Inputting the first group of performance test samples and the second group of performance test samples into an anti-interference evaluation module, the method comprising: Inputting the first group of performance test samples and the second group of performance test samples into the anti-interference evaluation module for analysis to obtain interference-reading success rate influence index, interference-reading distance influence index, and interference-reading time influence index; According to the interference-reading success rate influencing index, the interference-reading distance influencing index, and the interference-reading time influencing index, the anti-interference detection index of the RFID tag is output.

8. The method according to claim 1, characterized in that The coverage of the RFID tag is optimized by adjusting the power of the reader and the antenna position.

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