Wireless electronic personal dosimeter with dynamically adjustable alarm threshold and control method

Abstract

The application provides a wireless electronic personal dosimeter with dynamically adjustable alarm threshold and a control method, and relates to the technical field of radiation monitoring. The application comprises a detection module for collecting historical dose data of a user and constructing a personal dose management library. A wireless communication module is used to extract cumulative dose data. A human-computer interaction module is used to set a fixed alarm threshold, set a personalized alarm threshold according to real-time cumulative dose and cumulative dose data, compare the fixed alarm threshold with the personalized alarm threshold in real time, and select the lower value as the real-time alarm trigger standard. An alarm and updating module is used to judge whether the current dose of the user exceeds the real-time alarm trigger standard, and if so, an alarm is given and the current dose is uploaded to the personal dose management library for updating. The personalized alarm threshold set by the application can effectively reduce the cumulative risk of personal dose, and can more effectively protect personnel who are long-term in a low-dose environment, so as to realize personalized and precise management of radiation protection.

Description

Technical Field

[0001] This invention relates to the field of radiation monitoring technology, and in particular to a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds. Background Technology

[0002] Electronic personal dosimeters are key equipment in the field of nuclear radiation monitoring, playing an indispensable role in the radiation protection system of nuclear power plants. Their main function is to measure in real time the cumulative personal dose equivalent and instantaneous dose equivalent rate of workers exposed to X-rays / gamma rays during operations, and to promptly issue audible and visual alarms when the dose exceeds preset limits, thereby effectively preventing personnel from suffering excessive nuclear radiation exposure and providing a scientific basis for personnel dose monitoring and management. However, traditional electronic personal dosimeters generally adopt a fixed threshold alarm scheme, that is, triggering alarms based on preset dose thresholds. While this design can meet the radiation dose monitoring needs of a single operation scenario, it has certain technical limitations: it lacks the ability to dynamically track an individual's historical cumulative dose and cannot adjust the alarm strategy according to the long-term exposure of personnel, leading to a significant increase in the risk of missed reports for personnel with long-term low-dose exposure.

[0003] With the intelligent transformation of nuclear power plants and the improvement of radiation safety standards, radiation protection is developing towards refinement and intelligence, which places higher demands on the performance of electronic personal dosimeters. There is an urgent need to develop a wireless electronic personal dosimeter that can dynamically adjust the alarm threshold based on historical dose data to ensure accurate early warning when the annual cumulative dose approaches the limit, providing workers with a more comprehensive and personalized radiation safety barrier. Summary of the Invention

[0004] This invention provides a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds, which solves the defect of the fixed threshold alarm mechanism of the existing electronic personal dosimeter that cannot adapt to changes in the individual's historical cumulative dose.

[0005] On one hand, the present invention provides a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds, comprising:

[0006] The detection module is used to collect users' historical dose data, continuously measure dose rate, calculate real-time cumulative dose, and build a personal dose management library.

[0007] The wireless communication module is used to extract cumulative dose data for a user-preset number of days from the personal dose management library.

[0008] The human-computer interaction module is used to set fixed alarm thresholds based on historical dose data, set personalized alarm thresholds based on real-time cumulative dose and combined with cumulative dose data, compare the fixed alarm thresholds and personalized alarm thresholds in real time, and select the lower value as the real-time alarm trigger standard.

[0009] The alarm and update module determines whether the user's current dose exceeds the real-time alarm trigger standard. If so, it issues an alarm and uploads the current dose to the personal dose management database for updating.

[0010] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds includes the following steps for constructing a personal dose management library:

[0011] Historical dose data is obtained by obtaining past radiation dose records of staff from the radiation monitoring department and human resources department of the nuclear power plant, and removing invalid and erroneous data records.

[0012] Fixed dose rate measurement points are set up for different work areas and surrounding environments, and the dose rate meter is used to measure according to a predetermined frequency. During equipment maintenance and repair in nuclear power plants, the measurement frequency and measurement points are increased to obtain dose rate data and time information.

[0013] Based on dose rate data and time information, a finite element model is used to calculate the real-time cumulative dose, and a personal dose management library is constructed using historical dose data and real-time cumulative dose.

[0014] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm threshold includes the following steps for calculating real-time cumulative dose:

[0015] Create a three-dimensional geometric model that includes the radiation source, medium, and the location of the personnel, and determine the shielding material.

[0016] The three-dimensional geometric model is discretized into hexahedral elements, and the mesh density is selected according to the intensity of the radiation source. The node coordinates and element properties of each element are defined.

[0017] The steady-state radiative transfer equation is discretized on each element to obtain the finite element equation.

[0018] Based on the properties of the shielding material, radiation attenuation and reflection conditions are set at the boundary, and the boundary conditions are determined by combining the intensity and direction of the radiation source.

[0019] Based on the boundary conditions, the finite element equation is solved using the Gaussian elimination method to obtain the radiation flux, and the dose rate is calculated by combining the radiation weighting factor.

[0020] Within each time step, the dose rate is integrated over time to obtain the dose increment, and the dose increments within the time step are weighted to obtain the real-time cumulative dose.

[0021] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm threshold is provided, and the steps for calculating the radiation flux include:

[0022] The stiffness matrix and load vector are combined into an augmented matrix. The row containing the element with the largest absolute value in each column is found, and elimination calculations are performed to transform it into an upper triangular matrix. Starting from the last equation in the upper triangular matrix, the solution is performed step by step to obtain the radiation flux.

[0023] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds extracts cumulative dose data within a preset number of days, including:

[0024] The system obtains the preset number of days input by the user through the user interface, acquires the user's identification information, selects a connection tool to connect according to the type of personal dose management library, constructs a query statement, and obtains the cumulative dose data within the preset number of days based on the query statement.

[0025] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm threshold includes the following steps for setting a fixed alarm threshold:

[0026] Calculate the basic statistics of historical dose data and draw distribution charts to understand the distribution of historical dose data and obtain the distribution characteristics of historical dose data.

[0027] Different alarm levels are determined based on radiation protection standards and different work areas, and different alarm levels correspond to different alarm thresholds.

[0028] Based on the distribution, distribution characteristics, and alarm level, an initial alarm threshold is set, and dose changes under different conditions are simulated to check whether the alarm system can accurately issue an alarm when the dose exceeds the initial alarm threshold, and the test results are obtained.

[0029] The initial alarm threshold is adjusted based on the test results to obtain a fixed alarm threshold.

[0030] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds includes the following steps for setting personalized alarm thresholds:

[0031] The real-time cumulative dose and cumulative dose data are integrated to form a complete dose dataset.

[0032] Personalized data is obtained by analyzing the individual characteristics of employees based on their job position, health status, and radiation exposure history.

[0033] Calculate the statistics of real-time cumulative dose, and obtain the average level and fluctuation of real-time cumulative dose based on the statistics.

[0034] The relationship between real-time cumulative dose and cumulative dose data was analyzed to obtain the analysis results of average level, fluctuation and cumulative dose data.

[0035] Set personalized alarm thresholds based on personalized data and analysis results.

[0036] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds is provided. The personalized alarm threshold is expressed by the following formula:

[0037]

[0038] In the formula, T base It is the baseline threshold, D hist It is cumulative dose data, D limit It is the legally mandated annual dose rate value, and T is the personalized alarm threshold.

[0039] According to the present invention, a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds includes an alarm and update module comprising:

[0040] The sound alarm unit is used to emit an audible alarm to alert users and relevant personnel.

[0041] Visual alarm unit, used to display visual alarms, such as flashing lights or pop-up notification windows.

[0042] The alarm message sending unit is used to send SMS or email notifications to security managers and users.

[0043] The alarm event recording unit is used to record alarm events, including alarm time, user information, current dose, and alarm criteria that were triggered.

[0044] The update unit is used to upload the current dose to the personal dose management library for updating.

[0045] On the other hand, the present invention also provides a control method for a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds, comprising:

[0046] Collect users' historical dose data and continuously measure dose rate to calculate real-time cumulative dose and build a personal dose management library.

[0047] Extract the cumulative dose data within the user's preset number of days from the personal dose management library.

[0048] Set a fixed alarm threshold based on historical dose data, and set a personalized alarm threshold based on real-time cumulative dose and cumulative dose data. Compare the fixed alarm threshold and the personalized alarm threshold in real time, and select the lower value as the real-time alarm trigger standard.

[0049] Determine if the user's current dose exceeds the real-time alarm trigger standard. If so, trigger an alarm and upload the current dose to the personal dose management database for updating.

[0050] This invention provides a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds. By integrating data from multiple departments, cleaning data, and dynamically adjusting the measurement frequency, it solves the problems of scattered and unintegrated data in traditional dosimeters, and the impact of invalid data on the accuracy of analysis. It achieves the beneficial effects of improving data quality and reliability, and supporting long-term dose trend analysis. Through three-dimensional geometric modeling, finite element discretization, solving the radiative transfer equation using the Gaussian elimination method, and calculating the cumulative dose using time integration, it solves the problems of traditional methods ignoring spatial distribution and shielding effects, and having low calculation accuracy. It achieves the beneficial effect of supporting real-time dose updates in dynamic environments.

[0051] The present invention provides a wireless electronic personal dosimeter and control method with dynamically adjustable alarm threshold. It fully considers individual differences and adjusts the alarm threshold autonomously based on the individual's historical cumulative dose, which can effectively reduce the risk of personal dose accumulation and more effectively protect personnel who are in a low-dose environment for a long time, thus realizing personalized and precise management of radiation protection. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 This is a flowchart illustrating a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds provided in an embodiment of the present invention. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0055] The following is combined Figure 1 This invention describes a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds.

[0056] Figure 1This is a flowchart illustrating a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds provided in an embodiment of the present invention.

[0057] like Figure 1 As shown, an embodiment of the present invention provides a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds, comprising:

[0058] The detection module is used to collect users' historical dose data, continuously measure dose rate, calculate real-time cumulative dose, and build a personal dose management library.

[0059] The steps involved in building a personal dose management library include:

[0060] Historical dose data is obtained by obtaining past radiation dose records of staff from the radiation monitoring department and human resources department of the nuclear power plant, and removing invalid and erroneous data records.

[0061] Fixed dose rate measurement points are set up for different work areas and surrounding environments, and measurements are taken using dose rate meters at predetermined frequencies. During equipment maintenance and repair at the nuclear power plant, the measurement frequency and number of measurement points are increased to obtain dose rate data and time information. In different work areas, such as the reactor core area and fuel processing area, the location of dose rate measurement points will vary due to differences in the intensity and type of radiation sources. Measurement points in the surrounding environment may be distributed in residential areas and water sources near the nuclear power plant to monitor the radiation impact of the nuclear power plant on the surrounding environment. During equipment maintenance and repair, because workers are closer to the radiation source, increasing the measurement frequency and number of measurement points allows for more accurate acquisition of dose rate data for that time period.

[0062] Based on dose rate data and time information, a finite element model is used to calculate the real-time cumulative dose, and a personal dose management library is constructed using historical dose data and real-time cumulative dose.

[0063] The steps for calculating the real-time cumulative dose include:

[0064] Create a three-dimensional geometric model including the radiation source, the medium, and the location of the workers, and determine the shielding material. The radiation source may include gamma-ray sources, neutron sources, etc., and different types of radiation sources pose different radiation hazards to workers. The medium can be air, metal, etc., and different media have different absorption and scattering characteristics for radiation. The selection and placement of the shielding material directly affects the transmission and attenuation of radiation. For example, common shielding materials such as lead plates and concrete have shielding effects related to factors such as the material's thickness and density.

[0065] The three-dimensional geometric model is discretized into hexahedral elements, and the mesh density is selected according to the intensity of the radiation source. The nodal coordinates and element properties of each element are defined. When the radiation source intensity is high, a denser mesh density is needed to more accurately calculate the radiant flux, allowing the finite element model to better simulate the transmission and attenuation of radiation in different regions. The nodal coordinates of each element determine its position in three-dimensional space, while the element properties include material properties, radiation source properties, etc., which are crucial for calculating radiant flux and dose rate.

[0066] Discretizing the steady-state radiative transfer equation on each element yields the finite element equation, expressed as follows:

[0067]

[0068] In the formula, K ij These are the elements of the element's stiffness matrix. Let F be the radiative flux to be solved at node j. i It is the load vector of the element.

[0069] Based on the properties of the shielding material, radiation attenuation and reflection conditions are set at the boundary, and the boundary conditions are determined by combining the intensity and direction of the radiation source.

[0070] Based on the boundary conditions, the finite element equation is solved using the Gaussian elimination method to obtain the radiation flux, and the dose rate is calculated by combining the radiation weighting factor.

[0071] The steps to obtain the radiative flux include:

[0072] The stiffness matrix and load vector are combined into an augmented matrix. The row containing the element with the largest absolute value in each column is found, and elimination calculations are performed to transform it into an upper triangular matrix. Starting from the last equation in the upper triangular matrix, the radiative flux is solved step by step to obtain the formula:

[0073]

[0074] In the formula, K is the radiation vector of the i-th node, n is the total number of nodes, and K ii It is the diagonal element in the i-th row and i-th column of the stiffness matrix.

[0075] Within each time step, the dose rate is integrated over time to obtain the dose increment, and the dose increments within the time step are weighted to obtain the real-time cumulative dose.

[0076] The wireless communication module is used to extract cumulative dose data for a user-preset number of days from the personal dose management library.

[0077] Extracting cumulative dose data within a user-preset number of days includes:

[0078] The system retrieves the user's preset number of days and identification information through a user interface. It then uses a connection tool to connect to the personal dose management database based on its type, constructs a query, and retrieves the cumulative dose data within the preset number of days. The user interface should be designed to be simple and clear, facilitating user input of the preset number of days and identification information. Personal dose management databases may include relational databases, non-relational databases, etc., and different types of databases require corresponding connection tools. The query should be constructed based on the database structure and user needs to ensure accurate retrieval of cumulative dose data within the preset number of days.

[0079] The human-machine interface module is used to set fixed alarm thresholds based on historical dose data and personalized alarm thresholds based on real-time cumulative dose and cumulative dose data. The fixed and personalized alarm thresholds are compared in real-time, and the lower value is selected as the real-time alarm trigger standard. For workers who are not frequently exposed to radiation, their personal alarm thresholds are usually higher than the system's preset threshold. In this case, the equipment prioritizes the lower basic fixed threshold alarm strategy, avoiding excessive warnings while ensuring safety supervision. For workers who are exposed to radiation for extended periods, the personalized thresholds generated by the system are usually lower than the fixed thresholds. Using this optimized value as the alarm benchmark effectively controls the dose from individual operations and constrains the annual cumulative radiation dose, thus constructing a dual protection system of "short-term warning + long-term protection."

[0080] The steps to set a fixed alarm threshold include:

[0081] Calculate the basic statistics of historical dose data and create distribution charts to understand the distribution of historical dose data and obtain its distribution characteristics. Basic statistics may include the mean, variance, and median, while distribution charts may include histograms, box plots, etc. Analysis of these statistics and charts reveals the central tendency, dispersion, and other distribution characteristics of the historical dose data, providing a basis for setting fixed alarm thresholds.

[0082] Different alarm levels are determined based on radiation protection standards and different work areas, with different alarm levels corresponding to different alarm thresholds. Radiation protection standards are an important basis for setting alarm thresholds. Different work areas have different radiation risks, so alarm levels and thresholds will also differ. For example, in high-radiation-risk areas, alarm levels should be set higher, and corresponding alarm thresholds should be lower to ensure the safety of workers.

[0083] Based on the distribution, distribution characteristics, and alarm level, an initial alarm threshold is set, and dose changes under different conditions are simulated to check whether the alarm system can accurately issue an alarm when the dose exceeds the initial alarm threshold, obtaining the test results. Simulating dose changes under different conditions can be achieved by changing factors such as the intensity of the radiation source and the properties of the shielding material. The accuracy of the alarm system can be checked by comparing the simulation results with actual alarm conditions. Based on the test results, the initial alarm threshold is adjusted to obtain a fixed alarm threshold.

[0084] The initial alarm threshold is adjusted based on the test results to obtain a fixed alarm threshold.

[0085] The steps to set personalized alarm thresholds include:

[0086] The real-time cumulative dose and cumulative dose data are integrated to form a complete dose dataset.

[0087] Personalized data is obtained by analyzing the individual characteristics of workers based on their job position, health status, and radiation exposure history. Health status may include factors such as the increased sensitivity to radiation in certain groups, such as individuals with specific medical conditions. Job position determines the frequency and intensity of radiation exposure; for example, the radiation exposure of nuclear reactor operators differs from that of general maintenance workers. Health status affects a worker's tolerance to radiation; individuals with certain medical conditions may be more susceptible to radiation damage. Radiation exposure history reflects a worker's past radiation exposure; individuals who have been in high-radiation environments for extended periods and have accumulated high doses should have their personalized alarm thresholds set lower.

[0088] Radiation exposure history can include: individuals who have been in a high-radiation environment for a long period of time and have a high cumulative dose, as well as individuals who have been exposed to radiation occasionally.

[0089] Calculate the statistics of real-time cumulative dose, and obtain the average level and fluctuation of real-time cumulative dose based on the statistics.

[0090] The relationship between real-time cumulative dose and cumulative dose data was analyzed to obtain the analysis results of average level, fluctuation and cumulative dose data.

[0091] Personalized alarm thresholds are set based on individualized data and analysis results, expressed by the following formula:

[0092]

[0093] In the formula, T base It is the baseline threshold, D hist It is cumulative dose data, D limit It is the legally mandated annual dose rate value, and T is the personalized alarm threshold.

[0094] The alarm and update module determines whether the user's current dose exceeds the real-time alarm trigger standard. If so, it issues an alarm and uploads the current dose to the personal dose management database for updating.

[0095] The alarm and update module includes:

[0096] A sound alarm unit is used to emit audible alerts to alert users and relevant personnel. The sound alarm can be of different frequencies and intensities to attract the attention of users and relevant personnel. The sound alarm unit should have a certain volume adjustment function to adapt to different environmental needs.

[0097] A visual alarm unit is used to display visual alarms, such as flashing lights or pop-up notification windows. The flashing lights can be of different colors and frequencies, and the pop-up notification window should display detailed alarm information, such as the current dose and alarm threshold. The visual alarm unit should have good display quality to ensure that alarm information is clearly displayed under different lighting conditions.

[0098] The alarm message sending unit is used to send SMS or email notifications, delivering alarm information to safety management personnel and users. Alarm messages should include detailed alarm information, such as alarm time, user information, current dosage, and the triggered alarm criteria. SMS or email notifications should have reliable sending and receiving capabilities to ensure that safety management personnel and users receive alarm information promptly.

[0099] The alarm event recording unit is used to record alarm events, including alarm time, user information, current dosage, and triggered alarm criteria. The alarm event recording unit should have data storage and retrieval functions to facilitate analysis and management of alarm events by safety management personnel. The recorded data should have high accuracy and completeness for subsequent auditing and evaluation.

[0100] The update unit is used to upload the current dose to the personal dose management database for updating. The update unit should have fast and accurate upload capabilities to ensure that the current dose is updated to the personal dose management database in a timely manner. During the upload process, data verification should be performed to ensure that the uploaded data conforms to the format and requirements of the personal dose management database.

[0101] A wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds is proposed. This method involves creating a three-dimensional geometric model including the radiation source, medium, and the location of the worker, discretizing it into hexahedral elements, selecting the mesh density based on the intensity of the radiation source, discretizing the steady-state radiative transfer equation into a finite element equation, solving the finite element equation using Gaussian elimination to obtain the radiative flux, calculating the dose rate by incorporating a radiation weighting factor, integrating the dose rate over each time step to obtain the dose increment, and thus obtaining the real-time cumulative dose. This method considers multiple factors to make dose calculation more accurate and provide more reliable data support for radiation protection. Furthermore, by combining historical dose data and real-time cumulative dose data, personalized alarm thresholds are set considering individual characteristics, while fixed alarm thresholds are scientifically set to make the alarm thresholds more reasonable and accurately reflect individual radiation exposure, issuing timely alarms, significantly improving personnel safety, and effectively reducing the cumulative risk of individual and collective doses. Its wireless communication and dynamic alarm threshold adjustment functions are compatible with existing radiation monitoring systems, the process is simple, it is suitable for nuclear industry scenarios, and has practical application potential.

[0102] The present invention provides a control method for a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds, comprising:

[0103] Collect users' historical dose data and continuously measure dose rate to calculate real-time cumulative dose and build a personal dose management library.

[0104] Extract the cumulative dose data within the user's preset number of days from the personal dose management library.

[0105] Set a fixed alarm threshold based on historical dose data, and set a personalized alarm threshold based on real-time cumulative dose and cumulative dose data. Compare the fixed alarm threshold and the personalized alarm threshold in real time, and select the lower value as the real-time alarm trigger standard.

[0106] Determine if the user's current dose exceeds the real-time alarm trigger standard. If so, trigger an alarm and upload the current dose to the personal dose management database for updating.

[0107] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold, characterized in that, include: The detection module is used to collect users' historical dose data, continuously measure dose rate, calculate real-time cumulative dose, and build a personal dose management library; The wireless communication module is used to extract cumulative dose data within a user-preset number of days from the personal dose management library; The human-computer interaction module is used to set a fixed alarm threshold based on the historical dose data, set a personalized alarm threshold based on the real-time cumulative dose and the cumulative dose data, compare the fixed alarm threshold and the personalized alarm threshold in real time, and select the lower value as the real-time alarm trigger standard. The steps for setting the fixed alarm threshold include: Calculate the basic statistics of the historical dose data and draw a distribution chart to understand the distribution of the historical dose data, thereby obtaining the distribution characteristics of the historical dose data; Different alarm levels are determined based on radiation protection standards and different work areas, and different alarm levels correspond to different alarm thresholds. Based on the distribution, distribution characteristics, and alarm level, an initial alarm threshold is set, and dose changes under different conditions are simulated to check whether the alarm system can accurately issue an alarm when the dose exceeds the initial alarm threshold, and the test results are obtained. The fixed alarm threshold is obtained by adjusting the initial alarm threshold based on the test results. The steps for setting the personalized alarm threshold include: The real-time cumulative dose is integrated with the cumulative dose data to form a complete dose dataset; Personalized data is obtained by analyzing the individual characteristics of employees based on their job position, health status, and radiation exposure history. Calculate the statistics of the real-time cumulative dose, and obtain the average level and fluctuation of the real-time cumulative dose based on the statistics; Analyze the relationship between the real-time cumulative dose and the cumulative dose data to obtain the analysis results of the average level, the fluctuation, and the cumulative dose data; The personalized alarm threshold is set based on the personalized data and the analysis results; The alarm and update module determines whether the user's current dose exceeds the real-time alarm triggering standard. If so, it issues an alarm and uploads the current dose to the personal dose management database for updating.

2. The wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that, The steps for constructing the personal dose management library include: The historical dose data is obtained by obtaining past radiation dose records of staff from the radiation monitoring department and human resources department of the nuclear power plant, and removing invalid and erroneous data records. Fixed dose rate measurement points are set up for different work areas and surrounding environments, and the dose rate meter is used to measure according to a predetermined frequency. During equipment maintenance and repair in nuclear power plants, the measurement frequency and measurement points are increased to obtain dose rate data and time information. Based on the dose rate data and the time information, the real-time cumulative dose is calculated using a finite element model, and the personal dose management library is constructed using the historical dose data and the real-time cumulative dose.

3. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 2, characterized in that, The steps for calculating the real-time cumulative dose include: Create a three-dimensional geometric model that includes the radiation source, medium, and the location of the personnel, and determine the shielding material; The three-dimensional geometric model is discretized into hexahedral elements, and the mesh density is selected according to the intensity of the radiation source. The node coordinates and element properties of each element are defined. Discretizing the steady-state radiative transfer equation on each element yields the finite element equation. Based on the properties of the shielding material, radiation attenuation and reflection conditions on the boundary are set, and the boundary conditions are determined in combination with the intensity and direction of the radiation source. Based on the boundary conditions, the finite element equation is solved using the Gaussian elimination method to obtain the radiation flux, and the dose rate is calculated by combining the radiation weighting factor. Within each time step, the dose rate is integrated over time to obtain the dose increment, and the dose increments within the time step are weighted to obtain the real-time cumulative dose.

4. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 3, characterized in that, The steps for obtaining the radiation flux include: The stiffness matrix and load vector are combined into an augmented matrix. The row containing the element with the largest absolute value in each column is found, and elimination calculation is performed to transform it into an upper triangular matrix. Starting from the last equation in the upper triangular matrix, the solution is performed step by step to obtain the radiation flux.

5. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that, Extracting the cumulative dose data within the user's preset number of days includes: The system obtains the preset number of days input by the user through the user interface, acquires the user's identification information, selects a connection tool to connect according to the type of the personal dose management library, constructs a query statement, and obtains the cumulative dose data within the preset number of days based on the query statement.

6. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that, The personalized alarm threshold is expressed by the formula: In the formula, It is the baseline threshold. It is cumulative dose data. It is the legally mandated annual dose rate value. These are personalized alarm thresholds.

7. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that, The alarm and update module includes: The sound alarm unit is used to emit an audible alarm to alert users and relevant personnel. Visual alarm unit, used to display visual alarms, such as flashing lights or pop-up notification windows; The alarm message sending unit is used to send SMS or email notifications to send alarm information to security managers and users. The alarm event recording unit is used to record alarm events, including alarm time, user information, current dose, and alarm triggering criteria; The update unit is used to upload the current dose to the personal dose management library for updating.

8. A control method for a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds, comprising a wireless electronic personal dosimeter with dynamically adjustable alarm thresholds as described in any one of claims 1 to 7, characterized in that, The control method includes: Collect users' historical dose data and continuously measure dose rate to calculate real-time cumulative dose and build a personal dose management library; Extract the cumulative dose data within the user's preset number of days from the personal dose management library; A fixed alarm threshold is set based on the historical dose data, and a personalized alarm threshold is set based on the real-time cumulative dose and the cumulative dose data. The fixed alarm threshold and the personalized alarm threshold are compared in real time, and the lower value is selected as the real-time alarm triggering standard. Determine whether the user's current dose exceeds the real-time alarm triggering standard. If so, issue an alarm and upload the current dose to the personal dose management database for updating.

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