Ionizing radiation dosimetry method and system based on pulsed signals
By constructing a pulse matrix to analyze the accuracy and influence of pulse signals, obtaining measurement accuracy and processing the results, the problem of missed counts in counting electronic systems in high-energy accelerator radiation fields was solved, and the accuracy of neutron radiation dose measurement was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU INST OF METROLOGY
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-15
AI Technical Summary
Existing counting electronic systems suffer from undercounting in high-energy accelerator radiation fields, resulting in inaccurate neutron radiation dose measurements, especially in narrow-pulse, high-instantaneous-dose-rate radiation fields.
By constructing a pulse matrix, analyzing the precision performance parameters and parameter control influence of the pulse signal, obtaining the metrological accuracy of the radiation dose measurement results, and performing corresponding processing based on the metrological accuracy, such as repeating the measurement when it is inaccurate to improve accuracy.
It improves the accuracy of ionizing radiation measurement results based on pulse signals, especially in high-energy accelerator radiation fields, reduces undercounting, and improves the reliability of measurement.
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Figure CN120686301B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of radiation measurement technology, specifically relating to a method and system for measuring ionizing radiation dose based on pulse signals. Background Technology
[0002] The pulse-signal-based method for measuring ionizing radiation dose is a technique that converts radiation events into countable electrical signals using a detector to measure radiation dose. The system mainly consists of a detector, a signal processing unit, a data acquisition and processing module, and a display and output unit. The detector (such as a Geiger-Moeller counter, gas flow counter, or scintillation counter) generates ionizing events and pulse signals when radiation passes through it. These signals are amplified and shaped by a pulse amplifier before being fed into a counter for statistical analysis. The number of pulses per unit time (count rate) is calculated and converted into a dose rate using a formula. The data acquisition system can record and analyze radiation dose information in real time, generating detailed experimental reports. This method features high sensitivity, real-time monitoring, and ease of data analysis, and is widely used in nuclear industry, medicine, and environmental monitoring to ensure radiation safety.
[0003] Currently, commonly used instruments for measuring neutron radiation dose in neutron-generating radiation fields employ counting electronic systems, converting the recorded signal count into neutron reaction counts. However, with the advent of high-energy accelerators, narrow-pulse neutron radiation fields with high instantaneous dose rates have emerged, leading to severe undercounting in the instruments and resulting in inaccurate pulse signal detection results derived from the amount of nuclear reaction charge. Summary of the Invention
[0004] To address the aforementioned issues, this application provides a method and system for measuring ionizing radiation dose based on pulse signals.
[0005] According to a first aspect of the embodiments of this application, a method for measuring ionizing radiation dose based on pulse signals is provided, the method comprising:
[0006] The pulse signal accuracy performance parameters for acquiring ionizing radiation dose measurement parameters;
[0007] Based on the pulse signal accuracy performance parameters, the parameter control influence of the ionizing radiation dose measurement parameters is obtained;
[0008] The influence degree is controlled according to the parameters to obtain the metrological accuracy of the radiation dose measurement results;
[0009] The radiation dose measurement results are processed differently depending on the accuracy of the measurement.
[0010] In one embodiment, the pulse signal accuracy performance parameters for acquiring ionizing radiation dose measurement parameters include:
[0011] Construct a pulse matrix according to the sampling period of the pulse signal;
[0012] Based on the pulse matrix, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained.
[0013] In one embodiment, constructing the pulse matrix according to the sampling period of the pulse signal includes:
[0014] Multiple pulse signals existing within a single sampling period are represented as row vectors according to their temporal order.
[0015] Pulse signals with different sampling periods are arranged into a column vector according to their temporal order;
[0016] The pulse matrix is constructed using the normalized signal-to-noise ratio of the pulse signal as matrix elements.
[0017] In one embodiment, obtaining the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters based on the pulse matrix includes:
[0018] Obtain the cosine similarity between any two row vectors of the pulse matrix;
[0019] Obtain the mean cosine similarity of any two row vectors of the pulse matrix;
[0020] Obtain the number of vector pairs formed by the cosine similarity of any two row vectors of the pulse matrix;
[0021] Based on the cosine similarity, the mean of the cosine similarity, the number of vector pairs, and the matrix elements of the pulse matrix, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained.
[0022] In one embodiment, obtaining the parameter control influence degree of the ionizing radiation dose measurement parameter based on the pulse signal accuracy performance parameter includes:
[0023] To obtain the degree of fluctuation in the radiation dose measurement results;
[0024] Obtain the number of samples of the pulse signal;
[0025] The parameter control influence of the radiation dose measurement parameters is obtained based on the pulse signal accuracy performance parameters, the fluctuation degree, and the sample size.
[0026] In one embodiment, obtaining the fluctuation level of the radiation dose measurement result includes:
[0027] The ratio of the pulse signal accuracy performance parameter of any pulse signal before the j-th pulse signal in the i-th pulse signal sampling period to the column parameter corresponding to the pulse signal is obtained. The column parameter is the sort number of the pulse signal in the i-th pulse signal sampling period, where i and j are natural numbers.
[0028] Obtain the mean of the ratios;
[0029] The mean of the ratios is taken as the degree of fluctuation in the radiation dose measurement results.
[0030] In one embodiment, the step of controlling the influence of the parameters to obtain the metrological accuracy of the radiation dose measurement result includes:
[0031] Obtain the number of sampling periods of the pulse signal;
[0032] Obtain the difference in the parameter control influence of any two pulse signals in any sampling period;
[0033] The measurement accuracy of the radiation dose measurement result is obtained based on the number of sampling cycles of the pulse signal and the difference.
[0034] In one embodiment, the step of processing the radiation dose measurement results differently based on the measurement accuracy includes:
[0035] When the measurement accuracy is greater than or equal to the empirical threshold, the radiation dose measurement result is determined to be accurate.
[0036] When the measurement accuracy is less than the empirical threshold, the radiation dose measurement result is determined to be inaccurate.
[0037] In one embodiment, the step of processing the radiation dose measurement results differently based on the measurement accuracy further includes:
[0038] If the radiation dose measurement result is determined to be inaccurate, the ionizing radiation dose measurement is repeated multiple times, and the average of the multiple measurements is taken as the final measurement result.
[0039] According to a second aspect of the embodiments of this application, an ionizing radiation dose measurement system based on pulse signals is provided, the system including a measurement platform, the measurement platform comprising:
[0040] A memory on which computer programs are stored;
[0041] A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.
[0042] In summary, this application provides a method and system for measuring ionizing radiation dose based on pulse signals. The method includes: acquiring pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters; acquiring parameter control influence of the radiation dose measurement parameters based on the pulse signal accuracy performance parameters; acquiring the metrological accuracy of the radiation dose measurement results based on the parameter control influence; and performing different processing on the radiation dose measurement results based on the metrological accuracy. This application improves the accuracy of ionizing radiation measurement results by analyzing the pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters and the parameter control influence of radiation dose measurement parameters, and then performing different processing on the radiation dose measurement results based on the metrological accuracy (e.g., re-measuring measurement results that do not meet the metrological accuracy threshold). Attached Figure Description
[0043] To more clearly illustrate the implementation schemes of this application, the accompanying drawings used in the implementation schemes will be briefly introduced below. It should be understood that the accompanying drawings only show some implementation schemes of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from the accompanying drawings without creative effort.
[0044] Figure 1 This is a schematic diagram illustrating a pulse signal waveform for ionizing radiation dose measurement according to an exemplary embodiment;
[0045] Figure 2 This is a flowchart illustrating a pulse signal-based method for measuring ionizing radiation dose according to an exemplary embodiment;
[0046] Figure 3 This is a flowchart illustrating a method for obtaining pulse signal accuracy performance parameters for ionizing radiation dose measurement parameters according to an exemplary embodiment;
[0047] Figure 4 This is a flowchart illustrating a method for constructing a pulse matrix according to the sampling period of a pulse signal, based on an exemplary embodiment.
[0048] Figure 5 This is a flowchart illustrating a method for obtaining pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters based on a pulse matrix, according to an exemplary embodiment.
[0049] Figure 6 This is a flowchart illustrating a method for obtaining the parameter control influence of radiation dose measurement parameters based on pulse signal accuracy performance parameters, according to an exemplary embodiment.
[0050] Figure 7 This is a flowchart illustrating a method for obtaining the degree of fluctuation in radiation dose measurement results according to an exemplary embodiment;
[0051] Figure 8 This is a flowchart illustrating a method for obtaining the metrological accuracy of radiation dose measurement results based on parameter control influence degree according to an exemplary embodiment;
[0052] Figure 9 This is a flowchart illustrating a method for processing radiation dose measurement results differently based on metrological accuracy, according to an exemplary embodiment.
[0053] Figure 10 This is a flowchart illustrating yet another method for processing radiation dose measurement results differently based on metrological accuracy, according to an exemplary embodiment.
[0054] Figure 11 This is a block diagram illustrating an ionizing radiation dosimetry system based on a pulse signal, according to an exemplary embodiment.
[0055] Figure 12 This is a block diagram illustrating a measurement platform according to an exemplary embodiment. Detailed Implementation
[0056] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with specific implementation methods and accompanying drawings, will provide a comprehensive explanation of this application.
[0057] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.
[0058] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.
[0059] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.
[0060] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.
[0061] It should be noted that the terms "one" and "multiple" used in this application are illustrative rather than restrictive. Those skilled in the art should understand that, unless explicitly stated in the context, they should be interpreted as "one or more". In the description of this application, unless otherwise stated, "multiple" refers to two or more than two, and other quantifiers are similar; "at least one item", "one item or more items", or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item 'a' can represent any number of 'a's; as another example, one or more of a, b, and c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple; "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural.
[0062] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this application, this should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this application, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.
[0063] Meanwhile, it is understood that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of relevant laws, regulations and related provisions.
[0064] First, the application scenarios of this application will be explained. The detailed process for measuring ionizing radiation dose in a neutron radiation field is described below:
[0065] a) Select a suitable detector (such as BF3 detector, 3He detector, plastic scintillation detector).
[0066] b) Ensure that the laboratory has sufficient radiation shielding and safe operating facilities.
[0067] c) Install the detector in the appropriate position, ensuring that its relative position to the neutron source meets the requirements.
[0068] d) Configure a high-voltage power supply, pulse amplifier, and signal processing system.
[0069] e) Neutrons interact with the detector material, resulting in an ionization reaction.
[0070] f) The α particles, protons or other secondary particles produced in the reaction ionize the detector gas, forming ion pairs.
[0071] g) Ions move in an electric field, forming current pulses, and output voltage pulses as signals.
[0072] h) Use a pulse amplifier to amplify weak current pulses.
[0073] i) Use shaping circuits to convert pulse signals into standardized electrical pulses for easier counting.
[0074] j) Connect a digital counter to count the number of pulses per unit time (count rate).
[0075] k) Record the counting data using a computer or data logger to monitor neutron radiation intensity in real time.
[0076] l) Based on the detector characteristics, convert the count rate to the dose rate.
[0077] m) Calculate the cumulative dose and record the total dose over a certain period of time.
[0078] n) Analyze the recorded data and plot the dose over time.
[0079] o) Generate an experimental report, including radiation dose measurement, experimental conditions, measurement results, and dose assessment.
[0080] Because narrow-pulse high instantaneous dose rate neutron radiation fields are characterized by high instantaneous dose rates and small pulse widths, their high instantaneous dose rates often last for a very short time, possibly only a few microseconds to a few milliseconds. However, the response time of a counting-type neutron dosimeter circuit is usually 15 to 20 μs, and only one neutron signal can be recorded within one circuit response time. Therefore, there may be a problem of neutron dose rate counting errors. Figure 1 This is a schematic diagram illustrating a pulse signal waveform for ionizing radiation dose measurement according to an exemplary embodiment. Figure 1 As shown, the dashed waveform represents the neutron pulse of ionizing radiation, and the solid waveform represents the circuit response pulse signal of the neutron dosimeter. It can be seen that two consecutive neutron pulses of ionizing radiation only excite the circuit response pulse signal of one neutron dosimeter, which means that there is a problem of neutron dose rate counting error.
[0081] In view of this, embodiments of this application provide a method and system for measuring ionizing radiation dose based on pulse signals, aiming to solve the above-mentioned problems and improve the accuracy of ionizing radiation measurement results based on pulse signals. The present application will be described below with reference to specific embodiments.
[0082] Figure 2 This is a flowchart illustrating a pulse signal-based method for measuring ionizing radiation dose, according to an exemplary embodiment. Figure 2 As shown in the figure, this application provides a method for measuring ionizing radiation dose based on pulse signals, which may include the following steps:
[0083] In step S10, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained.
[0084] In this step, the pulse signal accuracy parameters of the ionizing radiation dose measurement parameters are obtained. For example, a pulse matrix can be constructed first according to the sampling period of the pulse signal, and then the pulse signal accuracy parameters of the ionizing radiation dose measurement parameters can be obtained based on the pulse matrix.
[0085] In step S20, the parameter control influence degree of the ionizing radiation dose measurement parameter is obtained based on the pulse signal accuracy performance parameter.
[0086] In this step, the parameter control influence of the ionizing radiation dose measurement parameters is obtained based on the pulse signal accuracy performance parameters. For example, the fluctuation level of the radiation dose measurement results can be obtained first, followed by the sample size of the pulse signal. Then, based on the pulse signal accuracy performance parameters, the fluctuation level, and the sample size, the parameter control influence of the radiation dose measurement parameters is obtained.
[0087] In step S30, the measurement accuracy of the radiation dose measurement result is obtained by controlling the influence of the parameters.
[0088] In this step, the metrological accuracy of the radiation dose measurement result is obtained based on the parameter control influence. For example, the number of sampling periods of the pulse signal can be obtained first, then the difference in parameter control influence between any two pulse signals in any sampling period can be obtained, and then the metrological accuracy of the radiation dose measurement result can be obtained based on the number of sampling periods of the pulse signal and the difference.
[0089] In step S40, the radiation dose measurement results are processed differently according to the measurement accuracy.
[0090] In this step, the radiation dose measurement results are processed differently depending on the measurement accuracy. For example, the radiation dose measurement result can be determined to be accurate when the measurement accuracy is greater than or equal to an empirical threshold, and inaccurate when the measurement accuracy is less than the empirical threshold. If the radiation dose measurement result is determined to be inaccurate, multiple ionizing radiation dose measurements are repeated, and the average of the multiple measurements is taken as the final measurement result.
[0091] In summary, this application provides a method for measuring ionizing radiation dose based on pulse signals. The method includes: acquiring pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters; acquiring parameter control influence of the radiation dose measurement parameters based on the pulse signal accuracy performance parameters; acquiring the metrological accuracy of the radiation dose measurement result based on the parameter control influence; and performing different processing on the radiation dose measurement result based on the metrological accuracy. This application improves the accuracy of ionizing radiation measurement results by analyzing the pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters and the parameter control influence of radiation dose measurement parameters, and then performing different processing on the radiation dose measurement result based on the metrological accuracy.
[0092] Figure 3 This is a flowchart illustrating a method for obtaining pulse signal accuracy performance parameters for ionizing radiation dose measurement parameters, according to an exemplary embodiment. Figure 3 As shown, the pulse signal accuracy performance parameters for obtaining ionizing radiation dose measurement parameters may include the following steps:
[0093] In step S101, a pulse matrix is constructed according to the sampling period of the pulse signal.
[0094] In this step, a pulse matrix is constructed according to the sampling period of the pulse signal. For example, multiple pulse signals existing in a single sampling period can first be represented as row vectors in chronological order, then pulse signals of different sampling periods can be arranged as column vectors in chronological order, and finally, the pulse matrix is constructed using the normalized signal-to-noise ratio of the pulse signal as matrix elements.
[0095] In step S102, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained according to the pulse matrix.
[0096] In this step, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained based on the pulse matrix. For example, the cosine similarity between any two row vectors of the pulse matrix can be obtained first, then the mean of the cosine similarity between any two row vectors of the pulse matrix can be obtained, followed by the number of vector pairs formed by the cosine similarity between any two row vectors of the pulse matrix. Finally, based on the cosine similarity, the mean of the cosine similarity, the number of vector pairs, and the matrix elements of the pulse matrix, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained.
[0097] Figure 4 This is a flowchart illustrating a method for constructing a pulse matrix according to the sampling period of a pulse signal, based on an exemplary embodiment. Figure 4 As shown, constructing the pulse matrix according to the sampling period of the pulse signal may include the following steps:
[0098] In step S1011, multiple pulse signals existing within a single sampling period are represented as row vectors according to their temporal order.
[0099] In this step, multiple pulse signals existing within a single sampling period are represented as row vectors in chronological order. For example, during radiation dose measurement, when neutrons collide with the nuclear material in the detector, they produce alpha particles, protons, or other secondary particles. These particles move at high speed within the detector material, colliding with and ionizing surrounding atoms to form ion pairs consisting of positively charged ions and negatively charged electrons. Under the influence of an applied electric field, the ions and electrons move towards the positive and negative electrodes, respectively, generating a current. With the collective movement of the ion pairs, this current forms a momentary voltage pulse between the detector electrodes. This voltage pulse is amplified by an amplifier, and the digital circuit acquires the voltage signal in real time, digitizing the waveform. Multiple pulse signals existing within a single sampling period can be represented as row vectors in chronological order of their sampling time points.
[0100] In step S1012, pulse signals with different sampling periods are arranged into a column vector according to their timing sequence.
[0101] In this step, pulse signals with different sampling periods are arranged into column vectors according to their temporal order. For example, the pulse signal of the first sampling period can be used as the first row vector of the matrix, the pulse signal of the second sampling period can be used as the second row vector of the matrix, and so on, to obtain column vectors of pulse signals with different sampling periods arranged in the temporal order of the sampling time points of the sampling period.
[0102] In step S1013, the pulse matrix is constructed using the normalized signal-to-noise ratio of the pulse signal as matrix elements.
[0103] In this step, a pulse matrix is constructed using the normalized signal-to-noise ratio (SNR) of the pulse signal as matrix elements. For example, any element of the pulse matrix can be represented as the normalized SNR δ of any pulse signal. i,j , where δ i,j =max_min(SNR) i,j ), where SNR i,j Let be the signal-to-noise ratio of the j-th pulse signal in the i-th row vector, and max_min() be the normalization process for the maximum and minimum values within the range of elements of the row vector.
[0104] Figure 5 This is a flowchart illustrating a method for obtaining pulse signal accuracy performance parameters of ionizing radiation dose measurement parameters based on a pulse matrix, according to an exemplary embodiment. Figure 5 As shown, obtaining the pulse signal accuracy performance parameters for ionizing radiation dose measurement parameters based on the pulse matrix may include the following steps:
[0105] In step S1021, the cosine similarity between any two row vectors of the pulse matrix is obtained.
[0106] In this step, any two row vectors P of the pulse matrix are obtained. s and P t cosine similarity C s,t For example, any two row vectors P of the pulse matrix s and P t cosine similarity C s,t It can be obtained from the following formula:
[0107] C s,t =cos(P s ,P t ) Formula 1
[0108] Here, cos() is the cosine similarity function.
[0109] The cosine similarity between any two row vectors of the pulse matrix can represent the similarity of the test results under different sampling periods. When the pulse signal changes more towards the instantaneous high pulse performance, the superposition of peaks is more obvious, and the row vector similarity is lower. Correspondingly, the more similar the two row vectors are, the smaller the influence of the detection pulse parameters on the detection results, and the smaller the corresponding detection accuracy control requirements.
[0110] In step S1022, the mean cosine similarity of any two row vectors of the pulse matrix is obtained.
[0111] In this step, any two row vectors P of the pulse matrix are obtained. s and P t cosine similarity Cs,t mean In other words, the mean of all cosine similarities is calculated, and the resulting mean cosine similarity is denoted as .
[0112] In step S1023, the number of vector pairs formed by the cosine similarity of any two row vectors of the pulse matrix is obtained.
[0113] In this step, the number J of vector pairs formed by the cosine similarity of any two row vectors of the pulse matrix is obtained.
[0114] In step S1024, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained based on the cosine similarity, the mean of the cosine similarity, the number of vector pairs, and the matrix elements of the pulse matrix.
[0115] In this step, based on the cosine similarity C u Mean of cosine similarity The number of vector pairs J, and the matrix elements δ of the impulse matrix. i,j The pulse signal accuracy performance parameter MJ for obtaining ionizing radiation dose measurement parameters. i,j For example, the pulse signal accuracy performance parameter MJ of ionizing radiation dose measurement parameters. i,j It can be obtained from the following formula:
[0116]
[0117] in, Non-zero, u represents the logarithmic index of every two row vectors, C u Let || denote the cosine similarity of the u-th row vector pair, and || denote the absolute value function.
[0118] This indicates the significance of the pulse signal performance at any sampling period. The larger the value, the worse the current measurement method is at capturing the instantaneous performance of the radiation pulse signal, and the more abnormal the accuracy of the matrix pulse signal.
[0119] Figure 6 This is a flowchart illustrating a method for obtaining the parameter control influence of radiation dose measurement parameters based on pulse signal accuracy performance parameters, according to an exemplary embodiment. Figure 6 As shown, obtaining the parameter control influence of the radiation dose measurement parameters based on the pulse signal accuracy performance parameters may include the following steps:
[0120] In step S201, the degree of fluctuation of the radiation dose measurement results is obtained.
[0121] In this step, the degree of fluctuation in the radiation dose measurement results is obtained. For example, the ratio of the pulse signal accuracy performance parameter of any pulse signal before the j-th pulse signal in the i-th pulse signal sampling period to the column parameter corresponding to that pulse signal can be obtained first. The column parameter is the sequence number of that pulse signal in the i-th pulse signal sampling period, where i and j are both natural numbers. Then, the mean of this ratio is obtained, and the mean of this ratio is used as the degree of fluctuation in the radiation dose measurement results of the i-th pulse signal sampling period.
[0122] In step S202, the number of samples of the pulse signal is obtained.
[0123] In this step, the number of samples R of the pulse signal for any sampling period is obtained.
[0124] In step S203, the parameter control influence of the radiation dose measurement parameters is obtained based on the pulse signal accuracy performance parameters, the fluctuation degree, and the number of samples.
[0125] In this step, the pulse signal accuracy performance parameter MJ is used. i,j The parameter control influence CK of the radiation dose measurement parameters in the i-th sampling period is obtained by considering the fluctuation degree BD and the sample size R. i For example, the parameter control influence CK of the radiation dose measurement parameters in the i-th sampling period. i It can be obtained from the following formula:
[0126]
[0127] Where j represents any pulse signal in a sampling period, BD represents the fluctuation of the radiation dose measurement result in a pulse signal sampling period, and MJ i,j If not zero, exp represents an exponential function with the natural constant e as its base. The larger the value, the greater the parameter control influence of the radiation dose measurement parameter CK in the i-th sampling period. i The smaller; The smaller the value, the greater the parameter control influence of the radiation dose measurement parameter CK in the i-th sampling period. i The larger.
[0128] Figure 7 This is a flowchart illustrating a method for obtaining the degree of fluctuation in radiation dose measurement results according to an exemplary embodiment. Figure 7 As shown, obtaining the fluctuation level of the radiation dose measurement results may include the following steps:
[0129] In step S2011, the ratio of the pulse signal accuracy performance parameter of any pulse signal before the j-th pulse signal in the i-th pulse signal sampling period to the column parameter corresponding to the any pulse signal is obtained. The column parameter is the sort number of the any pulse signal in the i-th pulse signal sampling period, where i and j are both natural numbers.
[0130] In this step, the pulse signal accuracy performance parameter MJ of the l-th pulse signal preceding (including) the j-th pulse signal in the i-th pulse signal sampling period is obtained. i,l The ratio MJ of the column parameter l corresponding to any pulse signal i,l / l, where i and j are natural numbers, and l is not zero.
[0131] In step S2012, the mean of the ratio is obtained.
[0132] In this step, the ratio MJ is obtained. i,l / l mean
[0133] In step S2013, the mean of the ratio is taken as the degree of fluctuation of the radiation dose measurement result.
[0134] In this step, the ratio MJ i,l / l mean The degree of fluctuation in the radiation dose measurement result during the i-th pulse signal sampling period is BD.
[0135] The larger the value, the greater the impact of the pulse signal performance in the i-th pulse signal sampling period on the test results. Therefore, the corresponding control parameters (such as the amplitude of the pulse signal) should have a greater weight in the measurement process.
[0136] Figure 8 This is a flowchart illustrating a method for obtaining the metrological accuracy of radiation dose measurement results based on parameter control influence, according to an exemplary embodiment. Figure 8 As shown, the step of controlling the influence of the parameters to obtain the metrological accuracy of the radiation dose measurement results may include the following steps:
[0137] In step S301, the number of sampling periods of the pulse signal is obtained.
[0138] In this step, the number of sampling periods r of the pulse signal is obtained.
[0139] In step S302, the difference in the parameter control influence of any two pulse signals in any sampling period is obtained.
[0140] In this step, the difference ΔCK between the parameter control influence of any two randomly selected pulse signals in any sampling period i is obtained. i .
[0141] In step S303, the measurement accuracy of the radiation dose measurement result is obtained based on the number of sampling cycles of the pulse signal and the difference.
[0142] In this step, based on the number of sampling periods r of the pulse signal and the difference ΔCK i The metrological accuracy JJ of the radiation dose measurement result is obtained. For example, the metrological accuracy JJ of the radiation dose measurement result can be obtained by the following formula:
[0143]
[0144] Where, max(ΔCK) i ) represents the difference ΔCK between the parameter control influence of any two pulse signals taken in any sampling period i. i The maximum value is found by max_min(), which represents the normalization process for the maximum and minimum values.
[0145] It can represent the overall cumulative difference in ionizing radiation detection results across all sampling periods.
[0146] Figure 9 This is a flowchart illustrating a method for processing radiation dose measurement results differently based on metrological accuracy, according to an exemplary embodiment. Figure 9 As shown, processing the radiation dose measurement results differently based on the measurement accuracy may include the following steps:
[0147] In step S401, when the measurement accuracy is greater than or equal to the empirical threshold, the radiation dose measurement result is determined to be accurate.
[0148] In this step, the radiation dose measurement result is considered accurate when the measurement accuracy JJ is greater than or equal to the empirical threshold (e.g., 0.95).
[0149] In step S402, when the measurement accuracy is less than the empirical threshold, the radiation dose measurement result is determined to be inaccurate.
[0150] In this step, if the measurement accuracy JJ is less than the empirical threshold (e.g., 0.95), the radiation dose measurement result is determined to be inaccurate.
[0151] Figure 10 This is a flowchart illustrating yet another method for processing radiation dose measurement results differently based on metrological accuracy, according to an exemplary embodiment. For example... Figure 10 As shown, the step of processing the radiation dose measurement results differently based on the measurement accuracy may further include the following steps:
[0152] In step S403, if the radiation dose measurement result is determined to be inaccurate, the ionizing radiation dose measurement is repeated multiple times, and the average of the multiple measurement results is taken as the final measurement result.
[0153] In this step, if the radiation dose measurement result is determined to be inaccurate, the ionizing radiation dose measurement is repeated multiple times, and the average of the multiple measurements is taken as the final measurement result.
[0154] This application also provides a computer-readable storage medium storing computer program instructions thereon, which, when executed by a processor, implement the steps of the pulse signal-based ionizing radiation dose measurement method provided in this application.
[0155] Figure 11 This is a block diagram illustrating an ionizing radiation dosimetry system based on a pulse signal, according to an exemplary embodiment. Figure 11 As shown, this application provides an ionizing radiation dose measurement system 1100 based on pulse signals, including a measurement platform 1200.
[0156] Figure 12 This is a block diagram illustrating a measurement platform according to an exemplary embodiment. For example, the measurement platform 1200 may be provided as a server. (Refer to...) Figure 12 The measurement platform 1200 includes a processor 1222, which further includes one or more processors, and memory resources represented by memory 1232 for storing instructions, such as application programs, that can be executed by the processor 1222. The application programs stored in memory 1232 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processor 1222 is configured to execute instructions to perform the aforementioned pulse signal-based ionizing radiation dosimetry method.
[0157] The measurement platform 1200 may also include a power supply component 1226 configured to perform power management of the measurement platform 1200, a communication component 1250 configured to connect the measurement platform 1200 to a network, and an input / output interface 1258. The measurement platform 1200 can operate on an operating system stored in memory 1232.
[0158] In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable electronic device, the computer program having a code portion for performing the above-described pulse signal-based ionizing radiation dose measurement method when executed by the programmable electronic device.
[0159] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.
Claims
1. A method for measuring ionizing radiation dose based on pulse signals, characterized in that, The method includes: The pulse signal accuracy performance parameters for obtaining ionizing radiation dose measurement parameters; Based on the pulse signal accuracy performance parameters, the parameter control influence of the ionizing radiation dose measurement parameters is obtained; The influence degree is controlled according to the parameters to obtain the metrological accuracy of the radiation dose measurement results; The radiation dose measurement results are processed differently depending on the measurement accuracy. The pulse signal accuracy performance parameters for acquiring ionizing radiation dose measurement parameters include: Construct a pulse matrix according to the sampling period of the pulse signal; Based on the pulse matrix, obtain the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters; The step of constructing a pulse matrix according to the sampling period of the pulse signal includes: Multiple pulse signals existing within a single sampling period are represented as row vectors according to their temporal order. Pulse signals with different sampling periods are arranged into a column vector according to their temporal order; The pulse matrix is constructed using the normalized signal-to-noise ratio of the pulse signal as matrix elements; The step of obtaining pulse signal accuracy performance parameters for ionizing radiation dose measurement parameters based on the pulse matrix includes: Obtain the cosine similarity between any two row vectors of the pulse matrix; Obtain the mean cosine similarity of any two row vectors of the pulse matrix; Obtain the number of vector pairs formed by the cosine similarity of any two row vectors of the pulse matrix; Based on the cosine similarity, the mean of the cosine similarity, the number of vector pairs, and the matrix elements of the pulse matrix, the pulse signal accuracy performance parameters of the ionizing radiation dose measurement parameters are obtained; the calculation formula for the pulse signal accuracy performance parameters is as follows: ;in, This represents the pulse signal accuracy parameter, where J represents the number of vector pairs. The matrix elements representing the pulse matrix, Represents cosine similarity. The mean of the cosine similarity; The step of obtaining the parameter control influence degree of the ionizing radiation dose measurement parameters based on the pulse signal accuracy performance parameters includes: To obtain the degree of fluctuation in the radiation dose measurement results; Obtain the number of samples of the pulse signal; Based on the pulse signal accuracy performance parameters, the fluctuation level, and the sample size, the parameter control influence of the radiation dose measurement parameters is obtained; the calculation formula for the parameter control influence is: ;in, R represents the influence of parameter control, and R represents the sample size. Indicates the degree of fluctuation. Represents an exponential function with the natural constant as its base; The degree of fluctuation in obtaining the radiation dose measurement results includes: The ratio of the pulse signal accuracy performance parameter of any pulse signal before the j-th pulse signal in the i-th pulse signal sampling period to the column parameter corresponding to the pulse signal is obtained. The column parameter is the sort number of the pulse signal in the i-th pulse signal sampling period, where i and j are natural numbers. Obtain the mean of the ratios; The average of the ratios is taken as the degree of fluctuation in the radiation dose measurement results; The step of controlling the influence of the parameters to obtain the metrological accuracy of the radiation dose measurement results includes: Obtain the number of sampling periods of the pulse signal; Obtain the difference in the parameter control influence of any two pulse signals in any sampling period; The metrological accuracy of the radiation dose measurement result is obtained based on the number of sampling periods of the pulse signal and the difference; the formula for calculating the metrological accuracy is: ;in, Indicates measurement accuracy. This indicates the normalization process for maximum and minimum values, where r represents the number of sampling periods of the pulse signal, and max represents the function for finding the maximum value. This represents the difference.
2. The method for measuring ionizing radiation dose based on pulse signals according to claim 1, characterized in that, The step of processing the radiation dose measurement results differently based on the measurement accuracy includes: When the measurement accuracy is greater than or equal to the empirical threshold, the radiation dose measurement result is determined to be accurate. When the measurement accuracy is less than the empirical threshold, the radiation dose measurement result is determined to be inaccurate.
3. The method for measuring ionizing radiation dose based on pulse signals according to claim 2, characterized in that, The step of processing the radiation dose measurement results differently based on the measurement accuracy also includes: If the radiation dose measurement result is determined to be inaccurate, the ionizing radiation dose measurement is repeated multiple times, and the average of the multiple measurements is taken as the final measurement result.
4. A pulse signal-based ionizing radiation dose measurement system, characterized in that, The system includes a measurement platform, which includes: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-3.