Layout optimization method of radio frequency identification antenna

Abstract

The invention discloses a layout optimization method of a radio frequency identification antenna, which comprises the following steps of: constructing a three-dimensional model of electrical equipment in which the radio frequency identification antenna needs to be arranged, and constructing a three-dimensional model of the electrical equipment based on the position of a radio frequency identification tag in the electrical equipment, simulating electric field intensity distribution of each candidate position through an electromagnetic simulation module according to the three-dimensional model of the electrical equipment and the candidate positions of the wireless radio frequency identification antenna to obtain simulation data; and selecting a layout position of the radio frequency identification antenna from the candidate positions of the radio frequency identification antenna based on simulation data so as to carry out layout setting of the radio frequency identification antenna. According to the invention, the antenna arrangement and maintenance cost is effectively reduced by reducing the number of the RFID antennas and reducing the requirement of manual debugging in the layout optimization process of the antennas, so that an efficient and economical RFID antenna layout optimization scheme is provided, and the reading efficiency of tags in an electrical cabinet and the system reliability can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a layout optimization method for a wireless radio frequency identification antenna. Background Art

[0002] With the in-depth development of industrial automation, the application of RFID (radio frequency identification) technology in the field of intelligent sensing and monitoring of electrical cabinets has become more and more extensive. In a modern industrial environment, electrical cabinets not only need to realize basic electrical equipment management and control functions, but also need to have a higher level of safety status monitoring functions, including detection of cabinet door switch status, temperature monitoring, humidity monitoring, and information collection of equipment operation status. The realization of these functions can greatly improve the safety, reliability and management efficiency of equipment.

[0003] Based on the above needs, RFID technology is widely used in the intelligent monitoring system of electrical cabinets due to its advantages such as non-contact, long-distance identification, and automatic data collection. Specifically, in the intelligent monitoring system of electrical cabinets, RFID tags and readers are installed in the electrical cabinets to achieve real-time monitoring of the operating status of the equipment. At present, in modern industry and power management, RFID technology has been widely used in electrical cabinet status monitoring. For example, when the door of the electrical cabinet is accidentally opened or abnormal temperature occurs, the RFID system can quickly identify and feedback, so as to provide timely warning information to managers to improve the management efficiency and safety of the electrical cabinet.

[0004] In the intelligent monitoring system of the electrical cabinet, RFID tags transmit data through wireless signals. However, the complex multipath environment inside the electrical cabinet is likely to cause multipath effects in signal transmission, that is, the signal needs to go through multiple reflection, refraction and scattering paths from the transmitter to the receiver to reach the receiving antenna. This multipath effect may cause signal cancellation, causing the RFID tag to be unreadable in certain locations. In other words, in a complex electromagnetic environment, the impact of multipath effects on signal propagation cannot be ignored. The dense distribution of metal parts causes radio waves to propagate simultaneously on multiple paths, and the reflection, refraction and scattering of the signal make the RFID tags in certain locations unreadable. The emergence of this situation will seriously restrict the detection accuracy and reliability of the RFID system, and thus affect the accuracy and reliability of the entire intelligent monitoring system.

[0005] Based on the above situation, it is urgent to study a solution that can improve the reading stability of RFID tags in complex electrical cabinet environments. At present, in order to deal with the signal blind area problem caused by multipath effect, the commonly used solutions include:

[0006] (1) Multi-antenna deployment

[0007] That is, by installing multiple RFID antennas in the electrical cabinet to cover different signal angles and areas, the signal path for reading can be increased. Although this solution can improve the readability of the tag, it also significantly increases the hardware cost and complexity of the system. In addition, the deployment of multiple antennas requires a lot of space, and it may not be possible to deploy multiple antennas due to the limitations of the internal structure of the electrical cabinet.

[0008] (2) On-site debugging and adjustment

[0009] This solution is to repeatedly debug and move the position of the tag during system installation to observe whether each tag can be read smoothly. Although this solution can intuitively solve the corresponding problem in theory, it requires a lot of manpower and time costs during its implementation. That is, engineers need to manually adjust the position of the tag and antenna on site to find the best reading solution. Such a solution is obviously inefficient and unsustainable for large-scale deployment and application.

[0010] In summary, although the above two existing solutions can alleviate the problem of multipath effect to a certain extent, they still obviously have problems such as high cost and low efficiency. Therefore, how to reduce costs and simplify the installation and debugging process while ensuring the reading performance of RFID tags has become an urgent problem and challenge to be solved in the application of RFID technology in the field of electrical cabinets. In view of this, the present invention is proposed. Summary of the invention

[0011] The purpose of the present invention is to provide a layout optimization method for a wireless radio frequency identification antenna to solve the problems of low layout cost and high efficiency in the prior art.

[0012] The objective of the present invention is achieved through the following technical solutions:

[0013] A method for optimizing the layout of a wireless radio frequency identification antenna, comprising:

[0014] Constructing a three-dimensional model of an electrical device that needs to be equipped with a wireless radio frequency identification antenna, and describing the shape and material of each component in the electrical device through the three-dimensional model of the electrical device;

[0015] Based on the position of the radio frequency identification tag in the electrical device, candidate positions of the radio frequency identification antenna are arranged in the electrical device, and based on the three-dimensional model of the electrical device and the candidate positions of the radio frequency identification antenna, the electric field strength distribution of each candidate position is simulated by an electromagnetic simulation module to obtain simulation data of the signal coverage and strength of each candidate position;

[0016] Based on the simulation data of the signal coverage range and strength, a layout position of the wireless RF antenna is selected from the candidate positions of the wireless RF antenna. In the selection process, the candidate position that can cover the most wireless RF identification tags and whose signal strength meets the predetermined requirements is preferentially selected as the layout position of the wireless RF antenna. After the selection process is completed, all the wireless RF identification tags in the electrical device are within the signal coverage range composed of all the selected layout positions; wherein all the selected layout positions are used to guide the layout setting of the wireless RF identification antenna in the electrical device.

[0017] The materials of the components include metal materials and insulating materials.

[0018] The method further includes:

[0019] Initialize the RF signal propagation environment in the simulated electrical cabinet, including setting the boundary conditions and electromagnetic characteristics of the simulated environment to describe the way the signal is reflected, attenuated and transmitted in the electrical cabinet; wherein the boundary conditions are used to determine whether the signal is reflected, absorbed or transmitted when it encounters the boundary, and the electromagnetic characteristics are used to determine the transmission speed and attenuation degree of the RF signal in different materials.

[0020] The process of arranging candidate positions of the radio frequency identification antenna in the electrical device includes:

[0021] The candidate position of the RFID antenna is arranged in the electrical device according to basic parameters of the RFID tag and the RFID antenna; wherein the basic parameters include operating frequency, transmission power, antenna type and directivity.

[0022] The process of arranging candidate positions of the radio frequency identification antenna in the electrical device further includes:

[0023] The candidate position of the radio frequency identification antenna is selected according to the space utilization rate and interference parameters in the electrical device, wherein the interference parameters are conditions affecting the signal transmission of the radio frequency identification antenna determined based on the three-dimensional model of the electrical device.

[0024] The simulation data of the signal coverage and strength of each candidate location includes:

[0025] attenuation parameters of the radio frequency signal on different paths, and multipath effect parameters of reflection, refraction and scattering caused by various components in the electrical device on the propagation of the radio frequency signal;

[0026] A signal blind area in the electrical device where the radio frequency identification tag data cannot be normally read is identified based on the attenuation parameter and the multipath effect parameter.

[0027] The process of selecting a layout position of a wireless radio frequency identification antenna from the candidate positions of the wireless radio frequency identification antenna includes:

[0028] Obtain the electric field strength of the RFID tags at fixed positions in the electrical cabinet according to the simulation data, and calculate the number of RFID tags at fixed positions where the electric field strength of the RFID tags is greater than the activation value at each position where the RFID antenna can be set;

[0029] According to the number of radio frequency identification tags greater than the activation value, a position where the maximum number of radio frequency identification tags can be read is selected as the layout position of the radio frequency antenna.

[0030] The process of selecting a layout position of a wireless radio frequency identification antenna from the candidate positions of the wireless radio frequency identification antenna also includes:

[0031] The propagation path of the signal is adjusted by adjusting the angle and direction of the wireless radio frequency antenna, and the layout position of the wireless radio frequency antenna is selected based on the adjustment result of the propagation path of the signal.

[0032] The method further includes:

[0033] After the layout setting of the radio frequency identification antenna in the electrical device is completed, the three-dimensional model of the electrical device and the parameters of the electromagnetic simulation module are adjusted according to the actual layout setting data fed back during the layout setting process.

[0034] Compared with the prior art, the layout optimization method of a wireless radio frequency identification antenna provided by the present invention analyzes the signal propagation effect of the antenna at multiple candidate positions through electromagnetic strength simulation technology, so as to find the best antenna position that can cover the most fixed tags, so as to improve the tag reading efficiency and accuracy of the overall system. Moreover, the present invention can also optimize the number and position of antennas through precise simulation and analysis, avoid excessive antenna deployment, thereby effectively reducing hardware costs and ensuring the performance of the monitoring system. In addition, during the implementation of the present invention, detailed simulation analysis can be completed in the design stage, reducing the need for on-site debugging and manual intervention, speeding up implementation, reducing the risk of human error, and improving deployment efficiency. In short, the embodiment of the present invention can ensure that the fixed tags in the electrical cabinet can be effectively read at the optimal antenna position by performing sufficient electromagnetic simulation and analysis in the early stage of design, providing an efficient, economical and reliable solution for the application of RFID technology in industrial intelligent monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0036] Figure 1 A processing flow chart of a layout optimization method for a wireless radio frequency identification antenna provided by an embodiment of the present invention;

[0037] Figure 2 A principle block diagram of a layout optimization method for a wireless radio frequency identification antenna provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0039] First, the terms that may be used in this article are explained as follows:

[0040] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0041] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0042] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0043] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0044] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0045] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0046] The present invention is mainly aimed at optimizing the design of the electrical cabinet status monitoring system in industrial automation and power management, and the corresponding electrical cabinet status monitoring system is implemented based on RFID technology. Specifically, the present invention is committed to improving the signal transmission and tag reading performance of the RFID system in the complex multipath environment in the electrical cabinet, which belongs to the intersection of electromagnetic simulation optimization and communication technology.

[0047] The embodiments of the present invention address the problem of unstable reading of tags at fixed positions due to the multipath effect when RFID technology is used in electrical cabinets. On the one hand, an optimized reading solution based on the fixed tag position is adopted, that is, the layout position of the corresponding RFID antenna is designed based on the determined fixed tag position to ensure that the reading of the RFID tag signal can reach or exceed the preset sensitivity threshold, thereby ensuring the reliability and stability of the reading. On the other hand, a simulation analysis technology of signal path and interference is adopted to analyze the propagation path of the signal in the electrical cabinet using a high-precision simulation tool to identify and solve the signal interference problem caused by the multipath effect, thereby further ensuring that the RFID tag can be reliably read.

[0048] That is, the present invention provides a solution based on electromagnetic intensity simulation during implementation, which can analyze the signal coverage of the antenna at different candidate positions through electromagnetic simulation technology, and then optimize the antenna layout in the electrical cabinet to ensure that the RFID tags at each fixed position in the electrical cabinet can be stably and reliably read. Therefore, the embodiment provided by the present invention can not only effectively improve the reading efficiency and reliability of the system, but also significantly reduce the hardware and labor costs of the RFID system during implementation, thereby providing an efficient, economical and reliable solution for the application of RFID technology in industrial intelligent monitoring.

[0049] The specific implementation process of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] The specific implementation scheme provided by the embodiment of the present invention is referred to Figure 1 and Figure 2 As shown, the corresponding implementation process may specifically include the following processing steps:

[0051] Step 11, 3D modeling and simulation initialization:

[0052] In this step, a three-dimensional model of the electrical equipment (such as an electrical cabinet, etc.) that needs to be equipped with a wireless radio frequency identification antenna needs to be constructed, and the shape and material of each component in the electrical equipment are described by the three-dimensional model of the electrical equipment;

[0053] Specifically, considering the many factors affecting antenna radiation and the complex structure of the electrical cabinet, advanced modeling software can be used to build a detailed three-dimensional model of the electrical cabinet to describe the shape and material of metal parts, insulating materials and other components in the electrical cabinet in detail;

[0054] In this step, basic parameters of the RFID system (i.e., a system including an RFID tag and an RFID antenna) may also be determined. The basic parameters may include parameters such as the operating frequency, transmission power, antenna type, and directivity of the system. Based on the basic parameters, the signal propagation characteristics in reality may be simulated, so as to facilitate the subsequent reference application of the processing process of arranging the candidate positions of the wireless radio frequency identification antenna;

[0055] In this step, it is also necessary to initialize the RF signal propagation environment in the simulated electrical cabinet, including setting the boundary conditions and electromagnetic characteristics of the simulation environment. When simulating the propagation path and intensity of the RF signal, the settings of these simulation environments help to accurately describe how the signal is reflected, attenuated, and transmitted in the electrical cabinet. Among them, the boundary conditions can determine whether the RF signal is reflected, absorbed, or transmitted when it hits the wall of the electrical cabinet or other boundaries, while the electromagnetic characteristics will affect the transmission speed and attenuation of the RF signal in different materials. In the subsequent simulation process, the simulation grid is divided into millions of simulation accuracy to ensure the accuracy and reliability of the simulation results.

[0056] Step 12, selection of candidate locations for fixed tags and RFID antennas:

[0057] Based on the position of the radio frequency identification tag in the electrical device, the candidate position of the radio frequency identification antenna is arranged in the electrical device; specifically, the candidate position of the radio frequency identification antenna can be arranged in the electrical device according to basic parameters of the radio frequency identification tag and the radio frequency identification antenna;

[0058] This step may specifically include:

[0059] First, the specific location of the fixed monitoring point that needs to be monitored by the RFID tag can be determined according to the layout and functional requirements of the electrical cabinet, and marked as the fixed location of the wireless radio frequency identification tag, so as to use it as the location of the wireless radio frequency identification tag in the electrical equipment;

[0060] After that, multiple reasonable candidate positions of the RFID antenna can be selected inside the electrical cabinet according to the fixed position of the corresponding tag and the three-dimensional model of the electrical cabinet and other information. The candidate positions refer to positions where the placement does not affect the normal operation of the electrical equipment itself and is convenient for deployment. The corresponding candidate positions can be selected according to the actual structure inside the electrical cabinet.

[0061] Specifically, in the process of selecting the candidate position of the wireless radio frequency identification antenna, aspects such as space utilization in the electrical equipment (such as the electrical cabinet) and possible interference factors (i.e., interference parameters) may also be considered. The interference parameters may be conditions affecting the signal transmission effect of the wireless radio frequency identification antenna determined based on the three-dimensional model of the electrical equipment, that is, conditions in the electrical cabinet that may cause interference to the signal transmission;

[0062] Furthermore, the process of arranging the candidate position of the wireless radio frequency identification antenna in the electrical device may include: arranging the candidate position of the wireless radio frequency identification antenna in the electrical device according to basic parameters of the wireless radio frequency identification tag and the wireless radio frequency identification antenna; wherein the basic parameters include the above-mentioned operating frequency, transmission power, antenna type and directivity and other parameters, based on which the signal coverage range of the RFID antenna and the range in which the RFID tag can be read can be determined.

[0063] Step 13, electromagnetic field strength simulation analysis:

[0064] In this step, it is necessary to simulate the electric field strength distribution of each candidate position through an electromagnetic simulation module based on the three-dimensional model of the electrical equipment, the initialized simulation environment and the candidate position of the wireless radio frequency identification antenna, and obtain simulation data of the signal coverage and strength of each candidate position;

[0065] Specifically, in this step, electromagnetic simulation software can be used to simulate the electric field strength distribution at each candidate antenna position (i.e., the candidate position of the wireless radio frequency identification antenna) to record the signal coverage range of each candidate position; and, the attenuation of the signal on different paths is analyzed, especially the influence of the reflection, refraction and scattering of the signal on the signal propagation process needs to be paid attention to, so as to determine the corresponding attenuation parameters and multipath effect parameters; then, the interference degree of the multipath effect on the tag reading is evaluated according to the corresponding attenuation parameters and multipath effect parameters, and then the signal blind area is identified, including the identification of potential reading difficulties, which are also regarded as the signal blind area of ​​the reading process.

[0066] Step 14, signal coverage and optimization:

[0067] In this step, the layout position of the wireless radio frequency antenna can be selected from the candidate positions of the wireless radio frequency identification antenna based on the simulation data of the signal coverage range and strength. In the selection process, the candidate position that can cover the most wireless radio frequency identification tags and whose signal strength meets the predetermined requirements is preferentially selected as the layout position of the wireless radio frequency antenna; specifically, since the positions for placing multiple RFID tags are fixed, the electric field strength of the fixed position RFID tags in the electrical cabinet can be obtained according to the simulation data, and for the RFID tags, if the field strength is greater than the activation value, they can be read. If the activation value is 20, the number of fixed position RFID tags with a field strength greater than the activation value at each position where the antenna can be set is calculated, that is, the number of tags that can be read at the corresponding position where the antenna can be set is obtained, and according to the number of wireless radio frequency identification tags greater than the activation value, the position where the largest number of tags can be read can be selected as the corresponding layout position of the wireless radio frequency antenna. After the selection process is completed, all the radio frequency identification tags in the electrical device are within the signal coverage range formed by all the selected layout positions after the corresponding radio frequency identification antennas are set; wherein all the selected layout positions are the positions where the corresponding radio frequency identification antennas need to be arranged in the future, so as to guide the layout setting of the radio frequency identification antennas in the electrical device;

[0068] Specifically, in this step, it is necessary to comprehensively evaluate the simulation data of the candidate positions of each wireless radio frequency identification antenna, and give priority to selecting the candidate position of the wireless radio frequency identification antenna that can cover the most fixed RFID tags and whose signal strength reaches the sensitivity threshold as the layout position of the wireless radio frequency identification antenna; after completing the design of the layout position of the corresponding wireless radio frequency identification antenna, it can be achieved that each RFID tag in the electrical cabinet can be reliably read by the arranged wireless radio frequency identification antenna;

[0069] Furthermore, the signal propagation path can be optimized by adjusting the angle and directivity of the wireless RF antenna to minimize signal blind spots and interference effects; in this way, the layout position of the wireless RF antenna can be further selected and adjusted based on the adjustment result of the signal propagation path, thereby ensuring maximum RFID tag coverage through the least RFID antenna to achieve the best balance between cost and performance.

[0070] That is, the embodiment of the present invention adopts an antenna layout optimization method based on electromagnetic simulation, thereby providing an implementation scheme that can optimize the layout of RFID antennas in electrical cabinets using electromagnetic simulation technology, so that the optimal antenna position can be found for layout setting by simulating and analyzing the electromagnetic field distribution of different antenna positions.

[0071] Step 15: Implementation, experimental verification and adjustment of the corresponding RFID antenna layout scheme:

[0072] After the layout position of the RFID antenna is finally determined according to the above simulation results, the optimized RFID antenna layout can be implemented in the actual electrical cabinet environment according to the corresponding layout position;

[0073] Furthermore, after the layout setting of the radio frequency identification antennas in the electrical device is completed, the three-dimensional model of the electrical device and the parameters of the electromagnetic simulation module can be adjusted according to the actual layout setting data fed back during the layout setting process; the actual layout setting data refers to the actual layout position of each RFID antenna and its angle and direction and other information;

[0074] That is, after conducting multiple on-site RFID antenna layout experiments in the electrical cabinet, the application effect of the optimized RFID antenna layout solution under actual operating conditions can be verified, and the layout of the RFID antenna can be adjusted on the spot according to the application effect to ensure that each RFID tag can be stably and accurately read in different environments; according to the actual layout setting data fed back after the on-site adjustment (i.e., experimental feedback information), necessary fine-tuning and optimization are performed on the previous simulation results to improve the overall layout optimization solution for the wireless radio frequency identification antenna.

[0075] In summary, in the technical solution provided by the above-mentioned embodiment of the present invention, referring to Figure 2 As shown, it is possible to analyze the influence of the RFID antenna on the electric field strength distribution at each position of the electrical cabinet, the influence of the RFID antenna placement on the readability of each tag, and optimize the simulation content to reduce memory overhead, thereby further determining the appropriate placement of the RFID antenna, so that each RFID tag in the electrical cabinet can be effectively read.

[0076] The implementation of the embodiment of the present invention can achieve system integration and cost control, that is, it can ensure that the layout of the RFID antenna can be seamlessly integrated with the existing monitoring system and has flexible upgrade and expansion capabilities; moreover, cost control factors are taken into account in the corresponding layout optimization process, that is, by reducing the number of RFID antennas and reducing the need for manual debugging, the overall implementation and maintenance costs of the embodiment of the present invention are effectively reduced, thereby providing an efficient and economical RFID antenna optimization layout solution, which significantly improves the reading efficiency and system reliability of RFID tags in electrical cabinets.

[0077] In summary, the above technical solution provided by the embodiment of the present invention has at least the following advantages and effects compared with the prior art:

[0078] (1) Optimizing reading reliability: The embodiments of the present invention use precise electromagnetic simulation technology to analyze the signal propagation effect of the antenna at multiple candidate positions, determine the coverage range and signal strength of the RFID antenna at different positions, obtain the optimal antenna position that can cover the most fixed-position tags (i.e., RFID tags in the electrical cabinet), and optimize the layout of the RFID antenna in the electrical cabinet based on this, thereby significantly improving the reading reliability of the system; that is, the optimal position and signal path of the antenna can be simulated and analyzed to effectively reduce the signal blind spot, ensure that all RFID tags at fixed positions can be stably and reliably read under different operating conditions, thereby maximizing the reading coverage of the RFID system, greatly improving the reliability, reading efficiency and accuracy of the monitoring system, and providing accurate real-time monitoring information, especially in terms of safety monitoring, such as the detection of cabinet door switch status and temperature changes.

[0079] (2) Reduce deployment costs: The embodiments of the present invention can optimize the minimum number and layout of antennas through accurate analysis of signal coverage, thereby reducing reliance on more antennas and avoiding the deployment of too many RFID antennas; further, this solution can also effectively reduce the hardware and installation costs of the RFID system. That is, through scientific simulation and optimization, the RFID system can significantly reduce hardware investment while ensuring the reading performance and the performance of the monitoring system, thereby reducing the capital investment of enterprises in the deployment of RFID systems.

[0080] (3) Improving installation efficiency: The implementation of the embodiments of the present invention can complete detailed simulation analysis and optimization of signal distribution in the design stage through preliminary electromagnetic simulation, thereby abandoning the cumbersome on-site debugging in traditional solutions, reducing the need for on-site debugging and manual intervention, greatly improving the installation efficiency of the RFID system, accelerating the implementation of the RFID system, reducing the risk of human error, and improving deployment efficiency; at the same time, it can also reduce the time and resources required for manual debugging and experiments, thereby enabling enterprises to deploy RFID systems more quickly and shorten project cycles.

[0081] (4) Providing scalability: The embodiments of the present invention provide a flexible RFID system architecture implementation solution that can adapt to electrical cabinets of different sizes and shapes and support future technology upgrades and functional expansions, thereby making the implementation scheme of the present invention more adaptable and ensuring that the RFID system maintains high efficiency and competitiveness in an evolving industrial environment.

[0082] (5) Realize all-round monitoring: The implementation of the embodiments of the present invention not only solves the problem of reading fixed tags, but also provides a stable monitoring platform for monitoring parameters such as temperature and humidity in the electrical cabinet, so that the intelligent monitoring system of the electrical cabinet using the embodiments of the present invention can more comprehensively monitor the working conditions of the electrical cabinet, thereby providing all-round data support and security for industrial management.

[0083] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A method for optimizing the layout of a wireless radio frequency identification antenna, characterized in that: include: Constructing a three-dimensional model of an electrical device that needs to be equipped with a wireless radio frequency identification antenna, and describing the shape and material of each component in the electrical device through the three-dimensional model of the electrical device; Based on the position of the radio frequency identification tag in the electrical device, candidate positions of the radio frequency identification antenna are arranged in the electrical device, and based on the three-dimensional model of the electrical device and the candidate positions of the radio frequency identification antenna, the electric field strength distribution of each candidate position is simulated by an electromagnetic simulation module to obtain simulation data of the signal coverage and strength of each candidate position; Based on the simulation data of the signal coverage range and strength, a layout position of the wireless RF antenna is selected from the candidate positions of the wireless RF antenna. In the selection process, the candidate position that can cover the most wireless RF identification tags and whose signal strength meets the predetermined requirements is preferentially selected as the layout position of the wireless RF antenna. After the selection process is completed, all the wireless RF identification tags in the electrical device are within the signal coverage range composed of all the selected layout positions; wherein all the selected layout positions are used to guide the layout setting of the wireless RF identification antenna in the electrical device.

2. The method according to claim 1, characterized in that The materials of the components include metal materials and insulating materials.

3. The method according to claim 1, characterized in that: The method further includes: Initialize the RF signal propagation environment in the simulated electrical cabinet, including setting the boundary conditions and electromagnetic characteristics of the simulated environment to describe the way the signal is reflected, attenuated and transmitted in the electrical cabinet; wherein the boundary conditions are used to determine whether the signal is reflected, absorbed or transmitted when it encounters the boundary, and the electromagnetic characteristics are used to determine the transmission speed and attenuation degree of the RF signal in different materials.

4. The method according to claim 1, characterized in that The process of arranging candidate positions of the radio frequency identification antenna in the electrical device includes: The candidate position of the RFID antenna is arranged in the electrical device according to basic parameters of the RFID tag and the RFID antenna; wherein the basic parameters include operating frequency, transmission power, antenna type and directivity.

5. The method according to claim 4, characterized in that The process of arranging candidate positions of the radio frequency identification antenna in the electrical device further includes: The candidate position of the radio frequency identification antenna is selected according to the space utilization rate and interference parameters in the electrical device, wherein the interference parameters are conditions affecting the signal transmission of the radio frequency identification antenna determined based on the three-dimensional model of the electrical device.

6. The method according to any one of claims 1 to 5, characterized in that: The simulation data of the signal coverage and strength of each candidate location includes: attenuation parameters of the radio frequency signal on different paths, and multipath effect parameters of reflection, refraction and scattering caused by various components in the electrical device on the propagation of the radio frequency signal; A signal blind area in the electrical device where the radio frequency identification tag data cannot be normally read is identified based on the attenuation parameter and the multipath effect parameter.

7. The method according to claim 6, characterized in that The process of selecting a layout position of a wireless radio frequency identification antenna from the candidate positions of the wireless radio frequency identification antenna includes: Obtain the electric field strength of the RFID tags at fixed positions in the electrical cabinet according to the simulation data, and calculate the number of RFID tags at fixed positions where the electric field strength of the RFID tags is greater than the activation value at each position where the RFID antenna can be set; According to the number of radio frequency identification tags greater than the activation value, a position where the maximum number of radio frequency identification tags can be read is selected as the layout position of the radio frequency antenna.

8. The method according to claim 6, characterized in that The process of selecting a layout position of a wireless radio frequency identification antenna from the candidate positions of the wireless radio frequency identification antenna also includes: The propagation path of the signal is adjusted by adjusting the angle and direction of the wireless radio frequency antenna, and the layout position of the wireless radio frequency antenna is selected based on the adjustment result of the propagation path of the signal.

9. The method according to claim 6, characterized in that The method further includes: After the layout setting of the radio frequency identification antenna in the electrical device is completed, the three-dimensional model of the electrical device and the parameters of the electromagnetic simulation module are adjusted according to the actual layout setting data fed back during the layout setting process.

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