A method, apparatus, and medium for personal dynamic dosimetry of a nuclear radiation area
Patent Information
- Application Number
- CN202511640085.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-20
Smart Images
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Abstract
Description
Technical Field
[0001] This application relates to the field of radiation measurement technology, specifically to a method, device, and medium for personal dynamic dosing in nuclear radiation areas. Background Technology
[0002] A personal dose alarm is a portable method for detecting personal dose. It detects the level of radiation in the wearer's environment in real time and calculates the wearer's personal radiation dose. When the accumulated personal radiation dose reaches a dangerous level, the alarm sounds. Radiation detectors estimate radiation levels by calculating the pulse data received by the detector over a certain period of time. However, because the generation of each pulse is a random event—that is, even if the ambient radiation level remains constant, the number of pulses recorded by the detector will fluctuate randomly—this may interfere with the accurate measurement of radiation levels.
[0003] Personal dose alarms need to measure radiation levels accurately in real time. However, current estimation models mainly consider statistical characteristics and ignore the impact of detector position changes on the measurement results. This increases the impact of random fluctuations in the detector on the accuracy of radiation magnitude calculation, thereby reducing the accuracy of personal radiation dose measurement. Summary of the Invention
[0004] In a first aspect, embodiments of this application provide a method for personal dynamic dosing in a nuclear radiation area, the method comprising the following steps: Acquire the voltage data and spatial coordinates of the personal dosimeter used by the staff during movement for all moments within a preset time period prior to the current moment; Based on the trend of voltage data changes at all times before the current time and the amount of change between all adjacent voltage data, determine the energy of the personal dose alarm at each time before the current time. The difference between the spatial coordinates of each time point before the current time and the previous time point is recorded as the trajectory of the motion at each time point before the current time. Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of motion trajectories between the current time and the previous time, the reliability of the data of the personal dose alarm at each time before the current time is determined, and the corrected radiation intensity of the personal dose alarm at the current time is determined by combining the energy of all times. Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, the smoothed energy value of the personal dose alarm at each time point before the current time is determined; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, the reliability of the radiation intensity of the personal dose alarm at the current time is determined. Based on the energy and position of all times prior to the current moment, as well as the corrected radiation intensity and the reliability of the radiation intensity, the final radiation intensity of the personal dose alarm at the current moment is determined, and the personal radiation dose is monitored.
[0005] Preferably, the method for determining the energy of the personal dose alarm at each time point before the current time is as follows: For the voltage data of the personal dose alarm at all times before the current time, the stage in which the voltage data changes from below the preset low threshold voltage to above the preset high threshold voltage and then changes back to below the preset low threshold voltage is recorded as the pulse occurrence stage. The time corresponding to the maximum voltage data in the pulse occurrence stage is recorded as the pulse occurrence time. Calculate the instantaneous power of the personal dose alarm at each time point before the current time. Integrate the instantaneous power at all times during each pulse occurrence phase before the current time as the energy at each pulse occurrence time. Set the energy at all times before the current time except for the pulse occurrence time to 0.
[0006] Preferably, the expression for the reliability of the data from the personal dose alarm at each time point prior to the current time is: ; This indicates the reliability of the data from the personal dosing alarm at time n prior to the current time. This represents the similarity of the trajectory of the personal dosing alarm between the current time and the nth time before the current time. This represents the difference in spatial coordinates between the current moment and the nth moment before the current moment for the personal dose alarm; z represents a preset constant greater than 0.
[0007] Preferably, the corrected radiation intensity of the personal dose alarm at the current moment is the mean of the product of the normalized values of the energy and data reliability of the personal dose alarm at all moments prior to the current moment.
[0008] Preferably, the expression for the smoothed energy value of the personal dose alarm at each time point prior to the current time is: In the formula, This represents the smoothed energy value at the nth time step before the current time step; This represents the k-th non-zero energy among all energy values before the current time. This indicates the energy order at the nth time point before the current time. This indicates the position of the k-th non-zero energy among all energies before the current time; K represents the number of all non-zero energies before the current time. This represents a preset constant that is greater than 0.
[0009] Preferably, the method for determining the reliability of the radiation intensity of the personal dose alarm at the current moment is as follows: Calculate the difference in smoothed energy values between each time point before the current time and the previous time point, and record it as the first difference between each time point before the current time. The expression for the reliability of the radiation intensity at the current moment of a personal dosimeter alarm is: In the formula, Indicates the reliability of the radiation intensity at the current moment of the personal dose alarm; This represents the correlation between the length of the trajectory of all moments prior to the current moment and the first difference of all moments.
[0010] Preferably, the method for determining the final radiation intensity of the personal dose alarm at the current moment is as follows: The mean of the product of the energy at all times prior to the current moment and its positional normalized value is recorded as the recent radiation intensity of the personal dose alarm at the current moment. The expression for the final radiation intensity of the detector at the current moment of the personal dosimeter alarm is: In the formula, Le represents the final radiation intensity of the personal dose alarm at the current moment; Fe represents the corrected radiation intensity of the personal dose alarm at the current moment. Re indicates the reliability of the radiation intensity of the personal dose alarm at the current moment; Re indicates the recent radiation intensity of the personal dose alarm at the current moment.
[0011] Preferably, the monitoring of personal radiation dose includes: The counter in the personal dose alarm is cleared to 0, and the final radiation intensity of the current moment and every subsequent moment is accumulated starting from the current moment. When the accumulated value of the counter is greater than or equal to the preset value, the personal radiation dose exceeds the standard; otherwise, it does not exceed the standard.
[0012] Secondly, embodiments of this application provide a personal dynamic dosimetry device for nuclear radiation areas, the device comprising: The radiation data acquisition module is used to acquire the voltage data and spatial coordinates of the personal dose alarm held by the staff during the movement, for all times within a preset time period before the current moment; The radiation data analysis module determines the energy of the personal dose alarm at each time before the current time based on the trend of voltage data changes at all times before the current time and the amount of change between all adjacent voltage data. The difference between the spatial coordinates of each time point before the current time and the previous time point is used to record the trajectory of the motion at each time point before the current time. Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of motion trajectories between the current time and the previous time, the reliability of the data of the personal dose alarm at each time before the current time is determined, and the corrected radiation intensity of the personal dose alarm at the current time is determined by combining the energy of all times. Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, the smoothed energy value of the personal dose alarm at each time point before the current time is determined; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, the reliability of the radiation intensity of the personal dose alarm at the current time is determined. The radiation dose prediction module is used to determine the final radiation intensity of the personal dose alarm at the current moment based on the energy and its position sequence of all moments before the current moment, as well as the corrected radiation intensity and the radiation intensity confidence level, and to monitor the personal radiation dose.
[0013] Thirdly, embodiments of this application also provide a personal dynamic dosing medium for a nuclear radiation area, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of any one of the above-described personal dynamic dosing methods for a nuclear radiation area.
[0014] As can be seen from the above embodiments, the personal dynamic dosing method for nuclear radiation areas provided in this application has at least the following beneficial effects: This application determines the reliability of data from a personal dose alarm at each time point before the current time by analyzing the differences in spatial coordinates between the current time and the time before the current time, as well as the similarity of motion trajectories between each time point and the current time. It then combines the energy from all times to determine the corrected radiation intensity of the personal dose alarm at the current time. The beneficial effect is that it eliminates interference in the statistical calculation of radiation intensity caused by changes in detector position. Based on the energy from each time point before the current time, and the difference between the position sequence of non-zero energy and the position sequence of zero energy before the current time, it determines the smoothed energy value of the personal dose alarm at each time point before the current time. Based on the differences in the smoothed energy values of all adjacent time points before the current time, the length of the motion trajectory at all times, and the differences in the smoothed energy values of adjacent time points, it determines the reliability of the radiation intensity of the personal dose alarm at the current time. The beneficial effect is that it enhances the reliability of the radiation intensity at the current time. Based on the energy and position sequence of all time points before the current time, the corrected radiation intensity, and the reliability of the radiation intensity, it determines the final radiation intensity of the personal dose alarm at the current time, monitoring the personal radiation dose. The beneficial effect is that it obtains a more accurate measurement value of the personal radiation dose.
[0015] This application eliminates the interference of the personal dose alarm's location on radiation dose measurement by analyzing the spatial location characteristics of the personal dose alarm, thereby improving the accuracy of personal radiation dose measurement. Attached Figure Description
[0016] To more clearly illustrate the technical solutions and advantages in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A flowchart illustrating the steps of a method for personal dynamic dosing in a nuclear radiation area, provided in one embodiment of this application; Figure 2 This is a schematic diagram of the final radiation intensity extraction process provided in one embodiment of this application; Figure 3 A block diagram of a personal dynamic dosing device for a nuclear radiation area provided in one embodiment of this application. Detailed Implementation
[0018] To further illustrate the technical means and effects adopted by this application to achieve the intended purpose of the invention, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a personal dynamic dosing method, device, and medium for nuclear radiation areas proposed in this application. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0020] The following description, in conjunction with the accompanying drawings, details a specific scheme for a personal dynamic dosing method, device, and medium in a nuclear radiation area provided in this application.
[0021] Please see Figure 1 The diagram illustrates a flowchart of a method for personal dynamic dosing in a nuclear radiation area according to an embodiment of this application. The method includes the following steps: Step S1: Obtain the voltage data and spatial coordinates of the personal dose alarm at all times within a preset time period before the current time, and determine the energy of the personal dose alarm at each time before the current time.
[0022] S101: Obtain voltage data and spatial location coordinates for all times within a preset time period prior to the current time.
[0023] The personal dose alarm uses a detector to detect radiation particles in the current environment, acquiring voltage data of the detector at all times within a preset time period. Simultaneously, a displacement sensor built into the personal dose alarm acquires the spatial coordinates of the detector at each moment, and the detector's internal resistance is obtained through its hardware parameters. The sampling interval for voltage data and spatial coordinates is set to T, the acquisition time to t, and the internal resistance to R.
[0024] It should be noted that the values of sampling interval T, acquisition duration t, and internal resistance R are all manually set. In this embodiment, the sampling interval T is 1ms, the acquisition duration t is 10s, and the internal resistance R is 20. The implementer may also set it according to the specific circumstances, and this embodiment does not impose any special restrictions.
[0025] Meanwhile, a displacement sensor is built into the personal dose alarm to obtain the spatial position of the detector at various times.
[0026] S102: Determine the energy of the personal dose alarm at each time point prior to the current time.
[0027] Furthermore, based on the voltage data trends of the personal dose alarm at all times prior to the current moment and the changes between all adjacent voltage data points, the energy of the personal dose alarm at each time prior to the current moment is determined, specifically as follows: For the voltage data of the personal dose alarm at all times before the current time, the stage in which the voltage data changes from below the preset low threshold voltage to above the preset high threshold voltage and then back to below the preset low threshold voltage is recorded as the pulse occurrence stage. The time corresponding to the maximum voltage data in the pulse occurrence stage is recorded as the pulse occurrence time.
[0028] It should be noted that the preset low threshold voltage and preset high threshold voltage are both set manually. In this embodiment, the preset low threshold voltage is 20mV and the preset high threshold voltage is 200mV. Implementers can also set them according to specific circumstances. This embodiment does not impose any special restrictions.
[0029] Based on the voltage and resistance data at each time point before the current time, the instantaneous power of the personal dose alarm at each time point before the current time is calculated. The integral of the instantaneous power of the personal dose alarm at all times during each pulse occurrence phase before the current time is taken as the energy at each pulse occurrence time. The energy at all times before the current time except for the pulse occurrence time is set to 0.
[0030] The process of calculating instantaneous power is a well-known counting method, and the specific process will not be described in detail.
[0031] Step S2: Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of the motion trajectory between the previous time and the current time, determine the data reliability of the personal dose alarm at each time before the current time, and combine the energy of all times to determine the corrected radiation intensity of the personal dose alarm at the current time.
[0032] When a radiation detector is fixed in one position, the radiation intensity can be calculated directly using the voltage data from all previous times because the position remains unchanged. However, the personal dose alarm device used in this embodiment usually moves continuously during use, so the movement of the detector needs to be considered in order to accurately calculate the radiation intensity.
[0033] Since the radiation detector in this embodiment needs to perform statistical calculations on the data to eliminate the error caused by the randomness of the detection results, it is necessary to compare the differences in the detector position at different times. If the data recorded by the detector is closer to the current position, the radiation data at the corresponding time is considered to be more useful in characterizing the radiation situation at the current time.
[0034] S201: Based on the differences in spatial coordinates between the current time and the time before the current time, and the similarity of motion trajectories between the current time and the time before the current time, determine the reliability of the data of the personal dose alarm at the time before the current time.
[0035] At any given moment, the radiation area measured by the detector is the entire area that the detector has moved, rather than a single point recorded by the displacement sensor. Therefore, in this embodiment, the detector's trajectory is calculated, and the more the detector's trajectories overlap between two moments, the more valuable the detector's radiation data at those two moments are for mutual reference.
[0036] Therefore, based on the differences in spatial coordinates between the current time and previous times, and the similarity of motion trajectories between each time and the current time, the reliability of the personal dose alarm data at each time before the current time is determined. This is used to characterize the reference value of the radiation detector data at the corresponding time before the current time for calculating the radiation intensity at the current time. The process for determining the reliability of the personal dose alarm data at each time before the current time is as follows: The difference between the spatial coordinates of each time point before the current time and the previous time point is recorded as the trajectory of the personal dose alarm at each time point before the current time.
[0037] In particular, since the motion trajectory cannot be calculated at the moment when the detector begins to move, the motion trajectory at the moment immediately following the moment when the detector begins to move is used as the motion trajectory at the moment when the detector begins to move.
[0038] Therefore, based on the differences in spatial coordinates between the current time and previous times, and the similarity of motion trajectories between the current time and previous times, the reliability of the data from the personal dosing alarm at previous times can be obtained: The expression for the reliability of data from personal dosing alarms at times prior to the current time is: ; This indicates the reliability of the data from the personal dosing alarm at time n prior to the current time. This represents the similarity of the trajectory of the personal dosing alarm between the current time and the nth time before the current time. This represents the difference in spatial coordinates between the current moment and the nth moment before the current moment for the personal dose alarm; z represents a preset constant greater than 0, used to prevent the denominator from being 0. The value of z is set manually. In this embodiment, the value of z is 0.01. Under the premise of ensuring that the denominator is not 0 and does not excessively affect the calculation result, the implementer can set it according to the specific situation. This embodiment does not impose any special restrictions.
[0039] It should be noted that there are many methods to measure the similarity between vectors. In this embodiment, the similarity between the motion trajectories at each time point before the current time and the motion trajectory at the current time is measured by calculating the cosine similarity. Alternatively, the implementer can also calculate the reciprocal of the Euclidean distance between the motion trajectories at each time point before the current time and the motion trajectory at the current time to measure the similarity. This embodiment does not impose any special restrictions on the choice of methods for calculating the similarity between different vectors.
[0040] The calculation process for cosine similarity is a well-known technique, and the specific calculation process will not be elaborated here.
[0041] Furthermore, it should be understood that there are many methods to measure the differences between coordinates. In this embodiment, the difference between the spatial position of the personal dose alarm at each time point before the current time and the spatial position at the current time is measured by calculating the Euclidean distance between the spatial position coordinates of the personal dose alarm at each time point before the current time and the spatial position coordinate at the current time. As other implementation methods, implementers may also use Manhattan distance, Chebyshev distance, etc. to measure the differences between different coordinates. This embodiment does not impose any special restrictions on the choice of method for measuring the differences between coordinates.
[0042] The calculation process for Euclidean distance is a well-known technique, and the specific calculation process will not be elaborated here.
[0043] The greater the difference in spatial coordinates between the current moment and a previous moment, the smaller the similarity of the motion trajectory, and the less reliable the data of the corresponding moment before the current moment, indicating that the data of the corresponding moment before the current moment has little reference value for the current moment; conversely, the smaller the difference in spatial coordinates between the current moment and a previous moment, the greater the similarity of the motion trajectory, and the more reliable the data of the corresponding moment before the current moment.
[0044] S202: Determine the corrected radiation intensity of the personal dose alarm at the current moment based on the reliability of data from the personal dose alarm at all moments prior to the current moment, and in combination with the energy at all moments.
[0045] Furthermore, in order to eliminate the radiation intensity measurement error caused by the change of detector position, the corrected radiation intensity of the personal dose alarm at the current moment is determined based on the data reliability of the personal dose alarm at each time before the current moment, and combined with the energy at all times. The corrected radiation intensity of the personal dose alarm at the current moment is the mean of the product of the energy and the normalized value of the data reliability at all times before the current moment.
[0046] The corrected radiation intensity is calculated statistically using the normalized value of data reliability as the weight. The method of calculating the radiation intensity by taking the mean can effectively suppress the radiation intensity measurement error caused by random fluctuations in the number of pulses. The use of data reliability as the weight can eliminate the radiation intensity measurement error caused by changes in the detector position.
[0047] Step S3: Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, determine the smoothed energy value of the personal dose alarm at each time point before the current time; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, determine the reliability of the radiation intensity of the personal dose alarm at the current time.
[0048] S301: Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, determine the smoothed energy value of the personal dose alarm at each time point before the current time.
[0049] The corrected radiation intensity is obtained by considering the change in the detector's position. However, the radiation intensity changes not only due to the detector's own position but also with the measurement time. Therefore, this embodiment calculates the radiation intensity reliability based on the drastic changes in energy at all times prior to the current moment, characterizing the intensity of the radiation intensity change over time in the past. The more drastic the change, the greater the change in radiation intensity at the current moment over time.
[0050] When radiation intensity changes drastically over time, since the corrected radiation intensity often uses past data rather than recent data, the final radiation intensity should be calculated using the most recent radiation intensity data, rather than using the corrected radiation intensity.
[0051] Since voltage data is recorded in discrete form, energy also exhibits discrete characteristics at all times. Therefore, energy smoothing is necessary. The specific calculation process for the smoothed energy value of a personal dosing alarm at each time step is as follows: The expression for the smoothed energy value of the personal dosimeter at all times prior to the current time is: In the formula, This represents the smoothed energy value at the nth time step before the current time step; This represents the k-th non-zero energy among all energy values before the current time. This indicates the energy order at the nth time point before the current time. This indicates the position of the k-th non-zero energy among all energies before the current time; K represents the number of all non-zero energies before the current time. This represents a preset constant greater than 0, used to prevent the denominator from being 0. The value is set manually, in this embodiment. The value of is 0.01. Provided that the denominator is not zero and does not excessively affect the calculation result, the implementer can set it according to the specific situation.
[0052] When calculating the smoothed energy value of each time before the current time, the difference in the position of the element corresponding to the current time is calculated by averaging the neighboring elements. The greater the difference in position between the energy of the corresponding time before the current time and the energy that is not zero, the farther apart the energy of the corresponding time is from the energy that is not zero, and the smaller its contribution to the energy value of the corresponding time. Therefore, the absolute value of the position difference is used as the weight to assign a value to the time when the energy is 0.
[0053] S302: Based on the difference in smoothed energy values of all adjacent moments before the current moment and the length of the motion trajectory at all moments, determine the reliability of the radiation intensity of the personal dose alarm at the current moment.
[0054] Furthermore, the difference in smoothed energy values between each time point before the current time and the previous time point is calculated and denoted as the first difference between each time point before the current time. It should be noted that there are many methods to measure differences. In this embodiment, the difference between the smoothed energy values of each time point before the current time point and the previous time point is measured by calculating the absolute value of the difference between the smoothed energy values of each time point before the current time point and the previous time point. Implementers may also use other methods to measure differences, such as ratios. This embodiment does not impose any special restrictions on the choice of methods to measure differences.
[0055] The expression for the reliability of the radiation intensity at the current moment of a personal dosimeter alarm is: In the formula, Indicates the reliability of the radiation intensity at the current moment of the personal dose alarm; This represents the correlation between the length of the trajectory of all moments prior to the current moment and the first difference of all moments.
[0056] It should be noted that there are many methods to measure the correlation between different variables. In this embodiment, the correlation between the motion trajectory and the first difference is measured by calculating the Pearson correlation coefficient between the length of the motion trajectory at all times before the current time and the first difference at all times. As another implementation method, the implementer may also use the Spearman correlation coefficient to measure the correlation between two variables. This embodiment does not impose any special restrictions on the choice of methods to measure the correlation between different variables.
[0057] Furthermore, based on the reliability of the radiation intensity of the personal dosimeter alarm at the current moment, which is a number ranging from 0 to 1, it can be understood that the lower the reliability, the less consistent the trend of changes in the length of the movement trajectory at all moments before the current moment and the trend of changes in the difference between the smoothed energy values at adjacent moments. This indicates that the change in radiation intensity of the staff wearing the personal dosimeter alarm during movement is not significantly correlated with their position changes, and the change in radiation intensity is less likely to be caused by changes in the staff's position. In other words, the correlation between the length of the movement trajectory at all moments and the difference between the smoothed energy values at all adjacent moments is smaller. Conversely, if the reliability of the radiation intensity is larger, the greater the consistency between the trend of changes in the length of the movement trajectory at all moments before the current moment and the trend of changes in the difference between the smoothed energy values at adjacent moments, this indicates that the change in radiation intensity of the staff wearing the personal dosimeter alarm during movement is more significantly correlated with their position changes, and the change in radiation intensity is more likely to be caused by changes in the staff's position. In other words, the correlation between the length of the movement trajectory at all moments and the difference between the smoothed energy values at all adjacent moments is larger.
[0058] Step S4: Based on the energy and position of all times before the current time, the corrected radiation intensity and the confidence level of the radiation intensity, determine the final radiation intensity of the personal dose alarm at the current time.
[0059] To understand the radiation levels over a period of time prior to the current moment and thus predict the radiation intensity at the current moment, the recent radiation intensity of the personal dose alarm is determined based on the energy and its sequence at all times prior to the current moment. The specific process is as follows: The mean of the product of the energy at all times prior to the current moment and its positional normalized value is recorded as the recent radiation intensity of the personal dose alarm at the current moment. The expression for the final radiation intensity of the detector at the current moment of the personal dosimeter alarm is: In the formula, Le represents the final radiation intensity of the personal dose alarm at the current moment; Fe represents the corrected radiation intensity of the personal dose alarm at the current moment. Re indicates the reliability of the radiation intensity of the personal dose alarm at the current moment; Re indicates the recent radiation intensity of the personal dose alarm at the current moment.
[0060] Based on the final radiation intensity of the detector at the current moment of the personal dose alarm, it can be understood that, with the reliability of the radiation intensity as the weight, the corrected radiation intensity and the recent radiation intensity are weighted and summed. The higher the reliability of the radiation intensity, the more obvious the characteristic of the radiation intensity changing with the detector's position. Therefore, the corrected radiation intensity should be used to calculate the final radiation intensity. Conversely, the lower the reliability of the radiation intensity, the more obvious the characteristic of the overall radiation intensity changing with time. Therefore, the recent radiation intensity should be used to calculate the final radiation intensity.
[0061] Preferably, the schematic diagram of the final radiation intensity extraction process provided in this embodiment is as follows: Figure 2 As shown.
[0062] Step S5: Monitor the individual radiation dose based on the final radiation intensity of the individual dose alarm at the current moment.
[0063] When using a personal dose alarm, first clear the internal counter to 0. After clearing, the counter will accumulate the final radiation intensity from the current moment and every moment thereafter. When the accumulated value of the counter is greater than or equal to the preset value, the personal dose alarm will sound an alarm, indicating that the personal dose exceeds the limit and you should immediately move away from the radiation source; otherwise, it does not exceed the limit.
[0064] It should be noted that the preset value is set manually. In this embodiment, the preset value is set to... The implementer may also set it according to the specific circumstances, and this embodiment does not impose any special restrictions.
[0065] Based on the same inventive concept as the above method, this application also provides a personal dynamic dosimetry device for nuclear radiation areas, including: The radiation data acquisition module is used to acquire the voltage data and spatial coordinates of the personal dose alarm held by the staff during the movement, for all times within a preset time period before the current moment; The radiation data analysis module determines the energy of the personal dose alarm at each time before the current time based on the trend of voltage data changes at all times before the current time and the amount of change between all adjacent voltage data. The difference between the spatial coordinates of each time point before the current time and the previous time point is used to record the trajectory of the motion at each time point before the current time. Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of motion trajectories between the current time and the previous time, the reliability of the data of the personal dose alarm at each time before the current time is determined, and the corrected radiation intensity of the personal dose alarm at the current time is determined by combining the energy of all times. Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, the smoothed energy value of the personal dose alarm at each time point before the current time is determined; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, the reliability of the radiation intensity of the personal dose alarm at the current time is determined. The radiation dose prediction module is used to determine the final radiation intensity of the personal dose alarm at the current moment based on the energy and its position sequence of all moments before the current moment, as well as the corrected radiation intensity and the radiation intensity confidence level, and to monitor the personal radiation dose.
[0066] This application provides a block diagram of a personal dynamic dosimetry device for nuclear radiation areas, as shown in the embodiments. Figure 3 As shown.
[0067] Based on the same inventive concept as the above method, this application embodiment also provides a personal dynamic dosing medium for a nuclear radiation area, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the steps of any one of the above-described personal dynamic dosing methods for a nuclear radiation area.
[0068] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments of this specification have been described above. Additionally, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are possible or may be advantageous.
[0069] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0070] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.
Claims
1. A method for individual dynamic dosing in a nuclear radiation zone, characterized in that, The method includes the following steps: Acquire the voltage data and spatial coordinates of the personal dosimeter used by the staff during movement for all moments within a preset time period prior to the current moment; Based on the trend of voltage data changes at all times before the current time and the amount of change between all adjacent voltage data, determine the energy of the personal dose alarm at each time before the current time. The difference between the spatial coordinates of each time point before the current time and the previous time point is recorded as the trajectory of the motion at each time point before the current time. Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of motion trajectories between the current time and the previous time, the reliability of the data of the personal dose alarm at each time before the current time is determined, and the corrected radiation intensity of the personal dose alarm at the current time is determined by combining the energy of all times. Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, the smoothed energy value of the personal dose alarm at each time point before the current time is determined; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, the reliability of the radiation intensity of the personal dose alarm at the current time is determined. Based on the energy and position of all times prior to the current moment, as well as the corrected radiation intensity and the reliability of the radiation intensity, the final radiation intensity of the personal dose alarm at the current moment is determined, and the personal radiation dose is monitored.
2. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The method for determining the energy of the personal dosing alarm at each time point before the current time is as follows: For the voltage data of the personal dose alarm at all times before the current time, the stage in which the voltage data changes from below the preset low threshold voltage to above the preset high threshold voltage and then changes back to below the preset low threshold voltage is recorded as the pulse occurrence stage. The time corresponding to the maximum voltage data in the pulse occurrence stage is recorded as the pulse occurrence time. Calculate the instantaneous power of the personal dose alarm at each time point before the current time. Integrate the instantaneous power at all times during each pulse occurrence phase before the current time as the energy at each pulse occurrence time. Set the energy at all times before the current time except for the pulse occurrence time to 0.
3. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The expression for the reliability of the data from the personal dosing alarm at times prior to the current time is: ; This indicates the reliability of the data from the personal dosing alarm at time n prior to the current time. This represents the similarity of the trajectory of the personal dosing alarm between the current moment and the nth moment before the current moment. This represents the difference in spatial coordinates between the current moment and the nth moment before the current moment for the personal dose alarm; z represents a preset constant greater than 0.
4. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The corrected radiation intensity of the personal dose alarm at the current moment is the mean of the product of the energy and the normalized value of the data reliability of all moments prior to the current moment.
5. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The expression for the smoothed energy value of the personal dosing alarm at all times prior to the current time is: In the formula, This represents the smoothed energy value at the nth time step before the current time step; This represents the k-th non-zero energy among all energy values before the current time. This indicates the energy order at the nth time point before the current time. This indicates the position of the k-th non-zero energy among all energies before the current time; K represents the number of all non-zero energies before the current time. This represents a preset constant that is greater than 0.
6. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The method for determining the reliability of the radiation intensity of the personal dose alarm at the current moment is as follows: Calculate the difference in smoothed energy values between each time point before the current time and the previous time point, and record it as the first difference between each time point before the current time. The expression for the reliability of the radiation intensity at the current moment of a personal dosimeter alarm is: In the formula, Indicates the reliability of the radiation intensity at the current moment of the personal dose alarm; This represents the correlation between the length of the trajectory of all moments prior to the current moment and the first difference of all moments.
7. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The method for determining the final radiation intensity of the personal dose alarm at the current moment is as follows: The mean of the product of the energy at all times prior to the current moment and its positional normalized value is recorded as the recent radiation intensity of the personal dose alarm at the current moment. The expression for the final radiation intensity of the detector at the current moment of the personal dosimeter alarm is: In the formula, Le represents the final radiation intensity of the personal dose alarm at the current moment; Fe represents the corrected radiation intensity of the personal dose alarm at the current moment. Re indicates the reliability of the radiation intensity of the personal dose alarm at the current moment; Re indicates the recent radiation intensity of the personal dose alarm at the current moment.
8. The method for personal dynamic dosing in a nuclear radiation area as described in claim 1, characterized in that, The monitoring of personal radiation dose includes: The counter in the personal dose alarm is cleared to 0, and the final radiation intensity of the current moment and every subsequent moment is accumulated starting from the current moment. When the accumulated value of the counter is greater than or equal to the preset value, the personal radiation dose exceeds the standard; otherwise, it does not exceed the standard.
9. A personal dynamic dosing device for a nuclear radiation area, implementing the personal dynamic dosing method for a nuclear radiation area as described in claim 1, characterized in that, The device includes: The radiation data acquisition module is used to acquire the voltage data and spatial coordinates of the personal dose alarm held by the staff during the movement, for all times within a preset time period before the current moment; The radiation data analysis module determines the energy of the personal dose alarm at each time before the current time based on the trend of voltage data changes at all times before the current time and the amount of change between all adjacent voltage data. The difference between the spatial coordinates of each time point before the current time and the previous time point is used to record the trajectory of the motion at each time point before the current time. Based on the differences in spatial coordinates between the current time and the previous time, and the similarity of motion trajectories between the current time and the previous time, the reliability of the data of the personal dose alarm at each time before the current time is determined, and the corrected radiation intensity of the personal dose alarm at the current time is determined by combining the energy of all times. Based on the energy at each time point before the current time, and the difference in position between the energy at each time point before the current time and the energy that is not zero, the smoothed energy value of the personal dose alarm at each time point before the current time is determined; based on the difference in the smoothed energy values of all adjacent time points before the current time, and the length of the motion trajectory at all time points, the reliability of the radiation intensity of the personal dose alarm at the current time is determined. The radiation dose prediction module is used to determine the final radiation intensity of the personal dose alarm at the current moment based on the energy and its position sequence of all moments before the current moment, as well as the corrected radiation intensity and the radiation intensity confidence level, and to monitor the personal radiation dose.
10. A personal dynamic dosing medium for a nuclear radiation zone, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the steps of a personal dynamic dosing method for a nuclear radiation area as described in any one of claims 1-8.