Wireless electronic personal dosimeter capable of dynamically adjusting alarm threshold and control method

Abstract

The invention provides a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold value and a control method, and relates to the technical field of radiation monitoring. Comprising a detection module used for collecting historical dose data of a user and constructing a personal dose management library. And the wireless communication module is used for extracting accumulated dose data. And the man-machine interaction module is used for setting a fixed alarm threshold value, setting a personalized alarm threshold value according to the real-time accumulated dose and the accumulated dose data, comparing the fixed alarm threshold value with the personalized alarm threshold value in real time, and selecting a lower value as a real-time alarm triggering standard. And the alarming and updating module is used for judging whether the current dose of the user exceeds a real-time alarming triggering standard, if so, alarming, and uploading the current dose to the personal dose management library for updating. According to the invention, through setting the personalized alarm threshold value, the personal dose accumulation risk can be effectively reduced, the personnel in a low-dose environment for a long time can be more effectively protected, and personalized and precise management of radiation protection is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation monitoring, and in particular to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold and a control method thereof. Background Art

[0002] Electronic personal dosimeters are key devices in nuclear radiation monitoring and play an indispensable role in the radiation protection system of nuclear power plants. Their primary function is to measure, in real time, the accumulated personal dose equivalent and instantaneous dose equivalent rate of workers due to X / gamma ray exposure during their work. When the dose exceeds the preset limit, they promptly issue an audible and visual alarm, effectively preventing personnel from being exposed to excessive nuclear radiation and providing a scientific basis for personnel dose monitoring and management. However, traditional electronic personal dosimeters generally use a fixed-threshold alarm scheme, triggering an alarm based on a preset dose threshold. 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 based on a person's long-term exposure. This significantly increases the risk of underreporting for individuals 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 becoming more sophisticated and intelligent, placing 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. This ensures accurate warnings when the annual cumulative dose approaches the limit, providing workers with a more comprehensive and personalized radiation safety barrier. Summary of the Invention

[0004] The present invention provides a wireless electronic personal dosimeter with dynamically adjustable alarm threshold and a control method, which are used to solve the defect that the fixed threshold alarm mechanism of electronic personal dosimeters in the prior art cannot adapt to changes in individual historical cumulative doses.

[0005] In one aspect, the present invention provides a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold, comprising:

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

[0007] The wireless communication module is used to extract the cumulative dose data within the user's preset days from the personal dose management library.

[0008] The human-computer interaction module is used to set a fixed alarm threshold based on historical dose data, set a personalized alarm threshold based on the real-time cumulative dose and combined with the 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.

[0009] The alarm and update module determines whether the user's current dose exceeds the real-time alarm trigger standard. If so, an alarm is issued and the current dose is uploaded to the personal dose management library for update.

[0010] According to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold provided by the present invention, the steps of constructing a personal dose management library include:

[0011] The radiation dose records of the workers were obtained from the radiation monitoring department and human resources department of the nuclear power plant, and the historical dose data were obtained by removing invalid and erroneous data records.

[0012] Fixed dose rate measurement points are set up for different working areas and surrounding environments, and measurements are performed using a dose rate meter at a predetermined frequency. When equipment maintenance and overhaul is carried out in nuclear power plants, the measurement frequency and measurement points are increased to obtain dose rate data and time information.

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

[0014] According to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold provided by the present invention, the steps of calculating a real-time cumulative dose include:

[0015] Create a 3D geometric model of the radiation source, media, and worker locations, and determine shielding materials.

[0016] The three-dimensional geometric model is discretized into hexahedral elements, and the grid 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 radiation transfer equation is discretized on each element to obtain the finite element equation.

[0018] According to the properties of the shielding material, the 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.

[0019] According to the boundary conditions, the Gaussian elimination method is used to solve the finite element equation to obtain the radiation flux, and the dose rate is calculated in combination with the radiation weight factor.

[0020] In each time step, the dose rate is integrated with time to obtain the dose increment, and the dose increment within the time step is weighted to obtain the real-time cumulative dose.

[0021] According to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold provided by the present invention, the steps of obtaining the radiation flux include:

[0022] Combine the stiffness matrix and the load vector into an augmented matrix, find the row with the element with the largest absolute value in each column, and perform elimination calculation to transform it into an upper triangular matrix. Start from the last equation in the upper triangular matrix and solve it step by step to obtain the radiation flux.

[0023] According to the wireless electronic personal dosimeter with dynamically adjustable alarm thresholds provided by the present invention, extracting cumulative dose data within a user-preset number of days includes:

[0024] Obtain the preset number of days entered by the user through the user interface, obtain the user's identification information, select the connection tool for connection according to the type of personal dose management library, and construct a query statement to obtain the cumulative dose data within the preset number of days according to the query statement.

[0025] According to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold provided by the present invention, the steps of setting a fixed alarm threshold include:

[0026] Calculate the basic statistics of historical dose data, 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 according to radiation protection standards and different working areas, and different alarm levels correspond to different alarm thresholds.

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

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

[0030] According to a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold provided by the present invention, the steps of setting a personalized alarm threshold include:

[0031] The real-time cumulative dose is integrated with the cumulative dose data to form a complete dose data set.

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

[0033] 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.

[0034] Analyze the relationship between real-time cumulative dose and cumulative dose data 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 threshold is provided, and the personalized alarm threshold is expressed as follows:

[0037]

[0038] Where, T base is the baseline threshold, D hist is the cumulative dose data, D limit is the statutory annual dose rate value, and T is the personalized alarm threshold.

[0039] According to the present invention, a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold is provided, wherein the alarm and update module includes:

[0040] The sound alarm unit is used to issue a sound alarm to alert users and relevant personnel.

[0041] A visual alarm unit is used to display visual alarms, such as flashing lights and pop-up prompt windows.

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

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

[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 capable of dynamically adjusting an alarm threshold, comprising:

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

[0047] The cumulative dose data within the user-preset number of days is extracted from the personal dose management library.

[0048] Set a fixed alarm threshold based on historical dose data, set a personalized alarm threshold based on the real-time cumulative dose and combined with the 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.

[0049] Determine whether the user's current dose exceeds the real-time alarm trigger standard. If so, an alarm will be issued and the current dose will be uploaded to the personal dose management library for update.

[0050] The present invention provides a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds. Through multi-department data integration, data cleaning and dynamic measurement frequency adjustment, the problems of traditional dosimeter data dispersion and lack of integration, and invalid data affecting analysis accuracy are solved, thereby improving data quality and reliability and supporting long-term dose trend analysis. Through three-dimensional geometric modeling, finite element discretization, and the use of Gaussian elimination method to solve the radiation transfer equation, and time integration to calculate the cumulative dose, the problems of traditional methods ignoring spatial distribution and shielding effects and low calculation accuracy are solved, and the beneficial effect of supporting real-time dose updates in dynamic environments is achieved.

[0051] The present invention provides a wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds. These methods fully account for individual differences and autonomously adjust the alarm thresholds based on the individual's historical cumulative dose. This can effectively reduce the risk of individual dose accumulation, more effectively protect people who are in low-dose environments for a long time, and achieve personalized and precise management of radiation protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0053] Figure 1 The present invention provides a flow chart of a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold and a control method. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0055] The following combination Figure 1 The present invention describes a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold and a control method thereof.

[0056] Figure 1The present invention provides a flow chart of a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold and a control method.

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

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

[0059] The steps to build a personal dose management library include:

[0060] The radiation dose records of the workers were obtained from the radiation monitoring department and human resources department of the nuclear power plant, and the historical dose data were obtained by 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 a dose rate meter at a predetermined frequency. During equipment maintenance and overhaul at a nuclear power plant, the measurement frequency and number of measurement points are increased to obtain dose rate data and time information. The dose rate measurement point settings vary in different work areas, such as the reactor core and fuel processing areas, due to the varying intensity and type of radiation sources. Measurement points for the surrounding environment may be located in residential areas and water sources surrounding the nuclear power plant to monitor the radiation impact of the nuclear power plant on the surrounding environment. During equipment maintenance and overhaul, workers are closer to the radiation source, so increasing the measurement frequency and number of measurement points allows for more accurate dose rate data to be obtained during that time period.

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

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

[0064] Create a 3D geometric model that includes the radiation source, medium, and worker locations, and determine the shielding materials. Radiation sources can include gamma rays, neutrons, and other sources, each posing different risks to workers. The medium can be air, metal, or other materials, each with varying absorption and scattering properties. The choice and configuration of shielding materials directly impacts radiation transmission and attenuation. For example, the effectiveness of common shielding materials like lead and concrete is dependent on factors such as thickness and density.

[0065] The 3D geometric model is discretized into hexahedral elements, and the mesh density is selected based on the intensity of the radiation source, defining the nodal coordinates and element properties of each element. When the radiation source is highly intense, a denser mesh density is required to more accurately calculate the radiation 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 3D space, while the element properties, including material properties and radiation source properties, are crucial for calculating radiation flux and dose rate.

[0066] The steady-state radiation transfer equation is discretized on each element to obtain the finite element equation, which is expressed as follows:

[0067]

[0068] Where K ij is the stiffness matrix element of the element, is the radiation flux to be solved at node j, F i is the element's load vector.

[0069] According to the properties of the shielding material, the 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.

[0070] According to the boundary conditions, the Gaussian elimination method is used to solve the finite element equation to obtain the radiation flux, and the dose rate is calculated in combination with the radiation weight factor.

[0071] The steps to solve for the radiation flux include:

[0072] Combine the stiffness matrix and the load vector into an augmented matrix, find the row with the largest absolute value in each column, and perform elimination to convert it into an upper triangular matrix. Start from the last equation in the upper triangular matrix and solve it step by step to obtain the radiation flux. The formula is expressed as:

[0073]

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

[0075] In each time step, the dose rate is integrated with time to obtain the dose increment, and the dose increment within the time step is weighted to obtain the real-time cumulative dose.

[0076] The wireless communication module is used to extract the cumulative dose data within the user's preset days from the personal dose management library.

[0077] Extracting the cumulative dosage data within the user-preset number of days includes:

[0078] The user interface obtains the preset number of days entered by the user, obtains the user's identification information, selects a connection tool based on the type of personal dose management library, and constructs a query statement to obtain the cumulative dose data within the preset number of days based on the query statement. The user interface should be designed to be concise and clear to facilitate the user to enter the preset number of days and identification information. The types of personal dose management libraries may include relational databases, non-relational databases, etc. Different types of databases require corresponding connection tools for connection. The query statement should be constructed according to the database structure and user needs to ensure that the cumulative dose data within the preset number of days can be accurately obtained.

[0079] 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 doses and in combination with cumulative dose data, compare the fixed alarm thresholds with the personalized alarm thresholds in real time, and select the lower value as the real-time alarm trigger standard. For workers who are not frequently exposed to radiation environments, their personal alarm thresholds are usually higher than the system preset thresholds. At this time, the equipment can avoid excessive warnings while ensuring safety supervision by prioritizing the execution of lower basic fixed threshold alarm strategies. For workers who are in radiation environments for a long time, the personalized thresholds generated by the system are usually lower than the fixed thresholds. Using this optimized value as the alarm benchmark can not only effectively control the dose of a single operation, but also constrain the annual cumulative exposure dose, thereby building a dual protection system of "short-term warning + long-term protection."

[0080] The steps to set fixed alarm thresholds include:

[0081] Calculate basic statistics for historical dose data and plot distribution charts to understand the distribution of historical dose data and determine its distribution characteristics. Basic statistics can include mean, variance, median, etc., and distribution charts can be histograms, boxplots, etc. By analyzing these statistics and charts, we can understand the distribution characteristics of historical dose data, such as central tendency and dispersion, and provide a basis for setting fixed alarm thresholds.

[0082] Different alarm levels are determined based on radiation protection standards and different work areas, and different alarm levels correspond to different alarm thresholds. Radiation protection standards are an important basis for setting alarm thresholds. Due to different radiation risks in different work areas, alarm levels and thresholds will also vary. For example, in high-radiation risk areas, the alarm level should be set higher, and the corresponding alarm threshold should be lower to ensure worker safety.

[0083] Based on the distribution, distribution characteristics, and alarm levels, an initial alarm threshold is set. Dose variations under different conditions are simulated to verify that the alarm system can accurately sound an alarm when the dose exceeds the initial alarm threshold and obtain test results. Simulating dose variations under different conditions can be achieved by varying factors such as the intensity of the radiation source and the properties of the shielding material. The accuracy of the alarm system can be verified by comparing the simulated results with the 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 according to the test results to obtain a fixed alarm threshold.

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

[0086] The real-time cumulative dose is integrated with the cumulative dose data to form a complete dose data set.

[0087] Personalized data is obtained by analyzing the individual characteristics of workers based on their job positions, health conditions, and radiation exposure history. Health conditions may include: certain groups of people may be more sensitive to radiation, such as those with specific diseases. The job position determines the frequency and intensity of workers' exposure to radiation. For example, the radiation exposure of nuclear reactor operators and general maintenance personnel is different. Health conditions can affect workers' tolerance to radiation. People with certain diseases may be more susceptible to radiation harm. Radiation exposure history reflects the workers' past radiation exposure. Individuals who have been in high-radiation environments for a long time and have a high cumulative dose 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 time with a high cumulative dose, as well as individuals who have been exposed to radiation only occasionally.

[0089] 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.

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

[0091] Set personalized alarm thresholds based on personalized data and analysis results. The formula is:

[0092]

[0093] Where, T base is the baseline threshold, D hist is the cumulative dose data, D limit is the statutory 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, an alarm is issued and the current dose is uploaded to the personal dose management library for update.

[0095] The alarm and update module includes:

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

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

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

[0099] The alarm event recording unit is used to record alarm events, including alarm time, user information, current dose, and the triggering alarm criteria. The alarm event recording unit should have data storage and query capabilities to facilitate safety management personnel to analyze and manage alarm events. The recorded data should be highly accurate and complete to facilitate subsequent audits and assessments.

[0100] The update unit is used to upload the current dose to the personal dose management library 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 library 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 library.

[0101] A wireless electronic personal dosimeter and control method with dynamically adjustable alarm thresholds creates a three-dimensional geometric model encompassing the radiation source, the medium, and the worker's location, discretizing it into hexahedral elements. The mesh density is selected based on the intensity of the radiation source, discretizing the steady-state radiation transfer equation into a finite element equation. The finite element equation is solved using Gaussian elimination to obtain the radiation flux. The dose rate is then calculated by integrating the radiation weighting factor. The dose rate is then integrated over each time step to obtain the dose increment, which in turn provides the real-time cumulative dose. This approach considers multiple factors, making dose calculation more accurate and providing more reliable data support for radiation protection. Furthermore, the method combines historical and real-time cumulative dose data to set personalized alarm thresholds based on individual characteristics. Furthermore, a scientifically defined fixed alarm threshold is set, making the threshold more reasonable and more accurate, reflecting individual radiation exposure and enabling timely alerts. This significantly improves personnel safety while effectively reducing the cumulative risk of both individual and collective doses. Its wireless communication and dynamic alarm threshold adjustment capabilities are compatible with existing radiation monitoring systems, simplifying the process, and are suitable for nuclear industry scenarios, demonstrating potential for practical application.

[0102] An embodiment of the present invention provides a control method for a wireless electronic personal dosimeter capable of dynamically adjusting an alarm threshold, comprising:

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

[0104] The cumulative dose data within the user-preset number of days is extracted from the personal dose management library.

[0105] Set a fixed alarm threshold based on historical dose data, set a personalized alarm threshold based on the real-time cumulative dose and combined with the 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.

[0106] Determine whether the user's current dose exceeds the real-time alarm trigger standard. If so, an alarm will be issued and the current dose will be uploaded to the personal dose management library for update.

[0107] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0108] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various 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 the user's historical dose data, continuously measure the dose rate, calculate the real-time cumulative dose, and build a personal dose management library; A wireless communication module, configured to extract cumulative dosage data within a user-preset number of days from the personal dosage management library; a human-computer interaction module, configured 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 in combination with the 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 triggering standard; The alarm and update module determines whether the user's current dose exceeds the real-time alarm trigger standard. If so, an alarm is issued and the current dose is uploaded to the personal dose management library for updating.

2. A wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that: The steps of constructing the personal dose management library include: Obtaining past radiation dose records of workers from the radiation monitoring department and human resources department of the nuclear power plant, and removing invalid and erroneous data records to obtain the historical dose data; Fixed dose rate measurement points are set up for different working areas and surrounding environments, and dose rate meters are used to measure at a predetermined frequency. When equipment maintenance and overhaul are carried out in nuclear power plants, the measurement frequency and measurement points are increased to obtain dose rate data and time information; The real-time cumulative dose is calculated using a finite element model according to the dose rate data and the time information, 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 step of calculating the real-time cumulative dose includes: Create a 3D geometric model that includes the radiation source, medium, and worker locations, and determine shielding materials; Discretizing the three-dimensional geometric model into hexahedral units, selecting a grid density according to the intensity of the radiation source, and defining the node coordinates and unit properties of each unit; The steady-state radiation transfer equation is discretized on each element to obtain the finite element equation; According to the properties of the shielding material, setting radiation attenuation and reflection conditions on the boundary, and determining the boundary conditions in combination with the intensity and direction of the radiation source; According to the boundary conditions, the finite element equation is solved by Gaussian elimination method to obtain the radiation flux, and the dose rate is calculated in combination with the radiation weight factor; In each time step, the dose rate is integrated with respect to time to obtain a dose increment, and the dose increments in 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 of obtaining the radiation flux include: The stiffness matrix and the load vector are combined into an augmented matrix, the row of the element with the largest absolute value in each column is found, and the matrix is ​​converted into an upper triangular matrix by elimination calculation. Starting from the last equation in the upper triangular matrix, the equation is solved step by step to obtain the radiation flux.

5. The wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that: Extracting the cumulative dosage data within the user-preset number of days includes: The preset number of days input by the user is obtained through the user interface, the user's identification information is obtained, a connection tool is selected according to the type of the personal dose management library for connection, and a query statement is constructed to obtain the cumulative dose data within the preset number of days according to the query statement.

6. The wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that: The steps of setting the fixed alarm threshold include: Calculating basic statistics of the historical dose data, and drawing a distribution chart to understand the distribution of the historical dose data, and obtaining the distribution characteristics of the historical dose data; Determine different alarm levels based on radiation protection standards and different work areas, and different alarm levels correspond to different alarm thresholds; An initial alarm threshold is set according to the distribution situation, the distribution characteristics, and the alarm level, and dose changes under different situations are simulated to check whether the alarm system can accurately issue an alarm when the dose exceeds the initial alarm threshold, thereby obtaining a test result; The initial alarm threshold is adjusted according to the test result to obtain the fixed alarm threshold.

7. The wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 1, characterized in that: The steps of setting the personalized alarm threshold include: integrating the real-time cumulative dose with the cumulative dose data to form a complete dose data set; Personalized data is obtained by analyzing individual characteristics of workers based on their job positions, health conditions, and radiation exposure history; Calculating statistics of the real-time cumulative dose, and obtaining an average level and fluctuation of the real-time cumulative dose according to the statistics; Analyzing the relationship between the real-time cumulative dose and the cumulative dose data to obtain analysis results of the average level, the fluctuation situation, and the cumulative dose data; The personalized alarm threshold is set according to the personalized data and the analysis result.

8. The wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to claim 7, characterized in that: The personalized alarm threshold is expressed as follows: Where, T base is the baseline threshold, D hist is the cumulative dose data, D limit is the statutory annual dose rate value, and T is the personalized alarm threshold.

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

10. A control method for a wireless electronic personal dosimeter with dynamically adjustable alarm threshold, which adopts the wireless electronic personal dosimeter with dynamically adjustable alarm threshold according to any one of claims 1 to 9, characterized in that: The control method includes: Collect users' historical dose data, continuously measure dose rates, calculate real-time cumulative doses, and build a personal dose management library; Extracting the cumulative dose data within a user-preset number of days from the personal dose management library; setting a fixed alarm threshold according to the historical dose data, setting a personalized alarm threshold according to the real-time cumulative dose and in combination with the cumulative dose data, comparing the fixed alarm threshold with the personalized alarm threshold in real time, and selecting the lower value as the real-time alarm triggering standard; Determine whether the user's current dose exceeds the real-time alarm trigger standard, and if so, issue an alarm, and upload the current dose to the personal dose management library for updating.

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