A method, system, medium and device for determining detection points of radiation field monitoring

Abstract

The present invention belongs to the field of radiation detection technology, and in particular relates to a method, system, medium and device for determining detection points for radiation field monitoring. The method includes calculating the detector response function of each radioactive source based on the physical information and geometric information of the radiation field; determining the quality factor of each radioactive source at different spatial positions according to the detector response function of each radioactive source, and determining at least two preferred detection points among all the quality factors based on preset conditions; calculating the correlation factor between any two preferred detection points; and processing the correlation factor using a detection point confirmation method to obtain the final detection point. The present invention avoids the phenomenon of weak detector response to the source, which may occur in the layout scheme, and leads to waste of detectors, based on the determination of the quality factor; and avoids the phenomenon of multiple detectors being sensitive to the same radioactive source and failing to take into account each radioactive source, based on the determination of the correlation factor.

Description

Technical Field

[0001] The present invention belongs to the field of radiation detection technology, and in particular relates to a method, system, medium and equipment for determining detection points for radiation field monitoring. Background Art

[0002] Nuclear radiation detectors measure radiation using the interaction between particles and matter. In a radiation field, the type and energy of the radioactive source are often known, and the intensity of the source needs to be determined. In radiation field monitoring at nuclear facilities, detector measurements and their changes can reflect variations in the intensity of the radioactive source, enabling personnel to effectively monitor the radiation field in real time throughout the entire space. To obtain accurate and reliable source terms, detector placement is crucial. Detection points must be sensitive to the radioactive source and, as far as possible, account for every source term, comprehensively reflecting variations in the source at different locations. Analysis by Tsinghua University indicates that inappropriate measurements can cause the inverted source activity to differ by an order of magnitude from the true activity value. Traditional detector placement relies on personnel experience and lacks relevant quantitative analysis, failing to ensure the reliability of detection points, often resulting in wasted resources and distorted assessments. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method, system, medium and equipment for determining detection points for radiation field monitoring.

[0004] The present invention solves the above-mentioned technical problem with the following technical solution: A method for determining a radiation field monitoring detection point, comprising:

[0005] Step 1: obtaining physical information and geometric information of the radiation field, and calculating the detector response function of each radiation source based on the physical information and the geometric information;

[0006] Step 2: determining the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and determining at least two preferred detection points among all the quality factors based on preset conditions;

[0007] Step 3, calculating the correlation factor between any two preferred detection points;

[0008] Step 4: Use the detection point confirmation method to process the correlation factor and obtain the final detection point.

[0009] The beneficial effects of the present invention are as follows: by defining a quality factor to screen detection points, detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that the detectors may have a weak response to the source and lead to waste of detectors in the traditional detector arrangement scheme that relies on manual experience; by evaluating the correlation between preferred detection points through a correlation factor, detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in the traditional detector arrangement scheme that relies on manual experience.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the step 1 is specifically as follows:

[0012] Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

[0013] Further, the step 2 is specifically as follows:

[0014] The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is:

[0015]

[0016] Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources;

[0017] The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points among all quality factors based on the preset condition.

[0018] Further, the step 3 is specifically as follows:

[0019] The correlation factor INC(r1, r2) is calculated by the second formula, which is:

[0020]

[0021] Among them, f i (r1) is the response function of the ith radiation source at r1, f i (r2) is the response function of the i-th radiation source at r2.

[0022] Further, the step 4 is specifically as follows:

[0023] The detection point confirmation method is:

[0024] The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points;

[0025] The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

[0026] Another technical solution of the present invention to solve the above technical problem is as follows: A system for determining detection points for radiation field monitoring, comprising:

[0027] an acquisition module, configured to acquire physical information and geometric information of the radiation field, and calculate a detector response function of each radiation source based on the physical information and the geometric information;

[0028] a preliminary determination module, configured to determine the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and to determine at least two preferred detection points among all the quality factors based on preset conditions;

[0029] A calculation module, used for calculating the correlation factor between any two preferred detection points;

[0030] The final determination module is used to process the correlation factor using the detection point confirmation method to obtain the final detection point.

[0031] The beneficial effects of the present invention are as follows: by defining a quality factor to screen detection points, detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that the detectors may have a weak response to the source and lead to waste of detectors in the traditional detector arrangement scheme that relies on manual experience; by evaluating the correlation between preferred detection points through a correlation factor, detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in the traditional detector arrangement scheme that relies on manual experience.

[0032] Furthermore, the acquisition module is specifically used to:

[0033] Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

[0034] Furthermore, the preliminary determination module is specifically used to:

[0035] The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is:

[0036]

[0037] Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources;

[0038] The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points among all quality factors based on the preset condition.

[0039] Furthermore, the calculation module is specifically used for:

[0040] The correlation factor INC(r1, r2) is calculated by the second formula, which is:

[0041]

[0042] Among them, f i (r1) is the response function of the ith radiation source at r1, f i (r2) is the response function of the i-th radiation source at r2

[0043] Furthermore, the final determination module is specifically configured to:

[0044] The detection point confirmation method is:

[0045] The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points;

[0046] The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

[0047] Another technical solution of the present invention to solve the above technical problem is as follows: a storage medium, in which instructions are stored. When a computer reads the instructions, the computer executes a method for determining a radiation field monitoring detection point as described in any one of the above items.

[0048] The beneficial effects of the present invention are as follows: by defining a quality factor to screen detection points, detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that the detectors may have a weak response to the source and lead to waste of detectors in the traditional detector arrangement scheme that relies on manual experience; by evaluating the correlation between preferred detection points through a correlation factor, detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in the traditional detector arrangement scheme that relies on manual experience.

[0049] Another technical solution of the present invention to solve the above technical problem is as follows: an electronic device includes the above storage medium and a processor that executes instructions in the above storage medium.

[0050] The beneficial effects of the present invention are as follows: by defining a quality factor to screen detection points, detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that the detectors may have a weak response to the source and lead to waste of detectors in the traditional detector arrangement scheme that relies on manual experience; by evaluating the correlation between preferred detection points through a correlation factor, detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in the traditional detector arrangement scheme that relies on manual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic flow chart of an embodiment of a method for determining detection points for radiation field monitoring according to the present invention;

[0052] Figure 2 A structural framework diagram of an embodiment of a system for determining detection points for radiation field monitoring provided by the present invention;

[0053] Figure 3 A schematic diagram of the distribution of radiation sources provided in an embodiment of a method for determining detection points for radiation field monitoring according to the present invention. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] like Figure 1 As shown, a method for determining a radiation field monitoring detection point includes:

[0056] Step 1: obtaining physical information and geometric information of the radiation field, and calculating the detector response function of each radiation source based on the physical information and the geometric information;

[0057] Step 2: determining the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and determining at least two preferred detection points among all the quality factors based on preset conditions;

[0058] Step 3, calculating the correlation factor between any two preferred detection points;

[0059] Step 4: Use the detection point confirmation method to process the correlation factor and obtain the final detection point.

[0060] In some possible implementations, detection points are screened by defining a quality factor. Detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that detectors may have weak responses to sources and lead to waste of detectors in traditional detector layout schemes that rely on manual experience; the correlation between preferred detection points is evaluated by a correlation factor, and detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in traditional detector layout schemes that rely on manual experience.

[0061] It should be noted that the parameters of each radiation source include: source intensity, energy distribution, angular distribution, location, etc.

[0062] The quality factor refers to the difference in the response of the detector to the radiation source at different locations.

[0063] For step 1, the parameters of each radiation source in the radiation field are obtained, and the intensity of each radiation source is assumed to be 1, thereby obtaining the normalized source intensity of each radiation source. The pre-set normalized source intensity of each radiation source is calculated through the full-space particle transport model to obtain the detector response function of each radiation source. The full-space particle transport model is constructed by physical information and geometric information of the radiation field.

[0064] Please note that the preset condition refers to a positive correlation between the number of preferred detection points and the number of radioactive sources, or a manually set number of preferred detection points. For example, if there are 100 radioactive sources, the number of preferred detection points could be 40; if there are 10 radioactive sources, the number of preferred detection points could be 4. The above data is for illustration only and does not imply a 5:2 ratio between radioactive sources and preferred detection points.

[0065] This technology addresses the problem that traditional detector placement relies on human experience, which can lead to inappropriate placement schemes, resulting in distortion in radiation field construction or source intensity inversion. This invention proposes a system for designing detector placement schemes for radiation field monitoring. This system determines appropriate detection points based on theoretical analysis, ensuring the reliability of radiation field construction for discrete source problems.

[0066] The technical solution of the present invention is a system for designing a radiation field monitoring detector arrangement scheme, which mainly includes four steps: solving a response function, screening optimal detection points, evaluating correlation, and determining the final detection points.

[0067] Step (1) Full space response function f i (r) Solve;

[0068] (1.1) Create a full-space particle transport model based on the geometry and material composition of the radiation field;

[0069] (1.2) Assume that the number of radioactive sources is N, and set the source S of normalized source strength at each of the N radioactive source positions. i , perform N independent transport calculations to calculate the radiation source S i The detector response function f at each position r in the entire space i (r), the detector response function f at space r i (r) represents the contribution of the radioactive source i to the detector reading at r;

[0070] Step (2) screening of preferred detection points;

[0071] (2.1) Calculate the quality factor FOM(r) at each location r in space. The quality factor FOM(r) represents the difference in the response of the detector at location r to each source. The calculation method of FOM(r) is:

[0072]

[0073] in: is the response function f of the detection point r to each radiation source i The average value of (r).

[0074] (2.2) Sort all the calculated quality factors and select N1 locations with larger quality factors as the preferred detection points. Based on the size of the radiation field and the number of sources, N1 = K*N, where K is generally an integer greater than 10;

[0075] Step (3) evaluating the correlation of the optimal detection points;

[0076] Combine all the preferred detection points in any pair and calculate the correlation factor between any two preferred detection points r1 and r2 as INC(r1,r2)

[0077]

[0078] in, f i The maximum value of (r).

[0079] Step (4) final detection point determination;

[0080] (4.1) First, select the two preferred detection points r1 and r2 with the largest correlation factor as the first batch of final detection points, and gradually form the final detection point R through the following steps;

[0081] (4.2) The final detection point is deducted from the preferred detection points as the detection point set R'{r'1,r'2,...r' i ,...,r' n'};

[0082] (4.3) Calculate the sum of the correlation factors Z(r') of each element of each detection point to be tested and the final detection point i ,R),Z(r' i ,R)=INC(r' i ,r1)+INC(r' i ,r2)+...+INC(r' i ,r i )+...+INC(r' i ,r N );

[0083] Among them, INC(r' i ,r1) represents r' i and r1, the correlation factor between the two optimal detection points. Similarly, INC(r' i ,r2) represents r'i The correlation factor between the two optimal detection points r2, INC(r' i ,r i ) represents r' i and r i The correlation factor between two optimal detection points, INC(r' i ,r N ) represents r' i and r N Correlation factor between two preferred detection points.

[0084] (4.4) For the sum of the correlation factors Z(r' i ,R) are sorted and the sum of the correlation factors Z(r' i ,R) is used as the new final detection point, and the final detection point set is updated to R(r1,r2,...,r i ,...r N ,r' i )

[0085] (4.5) Repeat steps (4.2)-(4.4) until the final number of detection points selected meets the detection requirements and can construct the entire radiation field.

[0086] In Example 1, the present invention selects the arrangement of radiation field monitoring detectors under the action of three point sources as an application example.

[0087] The radiation field size is 2m x 3m x 3m, e.g. Figure 3 As shown, the center positions of the three individual sources are (20, 20, 20), (-30, -25, -40), and (20, 20, -30). The coordinate origin is located at the center position, and the energy spectrum of the radiation source is the Watt fission spectrum.

[0088] Full space response function f i (r) Solve;

[0089] A particle transport model is created for the radiation field, and the radiation field is divided into a grid of (20x30x30). Sources S1, S2, and S3 with normalized source intensity are set at the positions of three point radiation sources, and the radiation field grid dose rate count is set. The response functions f1(l,m,n), f2(l,m,n), and f3(l,m,n) of the entire radiation field space to sources S1, S2, and S3 are calculated, where l,m,n represent the grid numbers in the X,Y,Z directions.

[0090] Preferred detection point screening:

[0091] For the grid (l,m,n), calculate its quality factor FOM(l,m,n);

[0092]

[0093] in

[0094] The 20 grids with the largest FOM (l, m, n) are selected as the preferred detection points and numbered as d, d = 1, 2, ..., 20, as shown in the following table.

[0095] Table 1. Optimal detection point response function and quality factor

[0096]

[0097]

[0098] Relevance evaluation:

[0099] For the 20 selected detection points, calculate the correlation factor INC(d1,d2) between their response functions:

[0100]

[0101] The correlation factors between the 20 preferred detection points are shown in the following table.

[0102] Table 2. Correlation factors of preferred detection points

[0103]

[0104]

[0105] Table 3 Correlation factors of preferred detection points continued

[0106]

[0107] *This numerical value indicates that: d1=2, d2=d1+1=3, that is, the correlation factor INC(2, 3) between the preferred detection points No. 2 and No. 3.

[0108] As shown in the table above, the detection points with the highest correlation factors are d1 = 1, d2 = d1 + 4 = 5. This means that preferred detection points 1 and 5 (corresponding to grids (7, 13, 11) and (13, 18, 18)) are sensitive to radiation sources S2 and S1, respectively. Therefore, detection points 1 and 5 are considered the first set of final detection points. The remaining preferred detection points are considered the set of target detection points, namely, preferred detection points 10, 11, 12, 14, 18, 19, and 20. The sum of the correlation factors of the target detection points with respect to the final detection points is calculated, as shown in Tables 3 and 4.

[0109] Table 3. Correlation factors between the probe points to be tested and the reference probe points

[0110]

[0111] Table 4. Sum of correlation factors between the detection points to be tested and the final detection points

[0112]

[0113] As shown in Table 4, the sum of the correlation factors of detection point No. 10 to the benchmark detection point set is the largest, and it is selected as the final detection point based on the comprehensive correlation between it and the benchmark detection points.

[0114] Then, the final detection points are No. 5, No. 1, and No. 10, and the corresponding grids are (7, 13, 11), (13, 18, 18), and (13, 17, 12), which correspond to the radiation sources S1, S2, and S3, respectively.

[0115] The present invention obtains appropriate detection points by calculation, does not rely on personnel experience, enables the detector to sensitively and efficiently reflect the reactor operating status, and provides a reliable detector arrangement scheme for nuclear facility radiation field monitoring.

[0116] The above embodiments are provided for the purpose of describing the present invention only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims. Various equivalent substitutions and modifications made without departing from the spirit and principles of the present invention are intended to be within the scope of the present invention.

[0117] Preferably, in any of the above embodiments, step 1 is specifically:

[0118] Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

[0119] It should be noted that the input data of the full-space particle transport is the particle transport model, and its output data is the response function of each position in space, where the particle transport is the transport calculation processing of the normalized source intensity;

[0120] Physical information includes: parameters such as the energy and angle of the radiation source, and the material composition in the geometry;

[0121] Geometric information is: the position and size of various objects in space;

[0122] Particle transport programs can be deterministic programs and Monte Carlo programs, such as DORT and MCNP.

[0123] Preferably, in any of the above embodiments, step 2 is specifically:

[0124] The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is:

[0125]

[0126] Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources;

[0127] The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points among all quality factors based on the preset condition.

[0128] Preferably, in any of the above embodiments, step 3 is specifically:

[0129] The correlation factor INC(r1, r2) is calculated by the second formula, which is:

[0130]

[0131] Among them, f i (r1) is the response function of the ith radiation source at r1, f i (r2) is the response function of the i-th radiation source at r2.

[0132] Preferably, in any of the above embodiments, step 4 is specifically:

[0133] The detection point confirmation method is:

[0134] The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points;

[0135] The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

[0136] like Figure 2 As shown, a system for determining detection points for radiation field monitoring includes:

[0137] An acquisition module 100 is configured to acquire physical information and geometric information of a radiation field, and calculate a detector response function of each radiation source based on the physical information and the geometric information;

[0138] A preliminary determination module 200 is configured to determine the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and to determine at least two preferred detection points among all the quality factors based on preset conditions;

[0139] A calculation module 300 is used to calculate the correlation factor between any two preferred detection points;

[0140] The final determination module 400 is used to process the correlation factor using a detection point confirmation method to obtain a final detection point.

[0141] In some possible implementations, detection points are screened by defining a quality factor. Detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that detectors may have weak responses to sources and lead to waste of detectors in traditional detector layout schemes that rely on manual experience; the correlation between preferred detection points is evaluated by a correlation factor, and detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in traditional detector layout schemes that rely on manual experience.

[0142] Preferably, in any of the above embodiments, the acquisition module 100 is specifically configured to:

[0143] Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

[0144] Preferably, in any of the above embodiments, the preliminary determination module 200 is specifically configured to:

[0145] The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is:

[0146]

[0147] Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources;

[0148] The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points among all quality factors based on the preset condition.

[0149] Preferably, in any of the above embodiments, the calculation module 300 is specifically configured to:

[0150] The correlation factor INC(r1, r2) is calculated by the second formula, which is:

[0151]

[0152] Among them, f i (r1) is the response function of the ith radiation source at r1, f i (r2) is the response function of the i-th radiation source at r2.

[0153] Preferably, in any of the above embodiments, the final determination module 400 is specifically configured to:

[0154] The detection point confirmation method is:

[0155] The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points;

[0156] The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

[0157] Another technical solution of the present invention to solve the above technical problem is as follows: a storage medium, in which instructions are stored. When a computer reads the instructions, the computer executes a method for determining a radiation field monitoring detection point as described in any one of the above items.

[0158] In some possible implementations, detection points are screened by defining a quality factor. Detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that detectors may have weak responses to sources and lead to waste of detectors in traditional detector layout schemes that rely on manual experience; the correlation between preferred detection points is evaluated by a correlation factor, and detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in traditional detector layout schemes that rely on manual experience.

[0159] Another technical solution of the present invention to solve the above technical problem is as follows: an electronic device includes the above storage medium and a processor that executes instructions in the above storage medium.

[0160] In some possible implementations, detection points are screened by defining a quality factor. Detection points with a high quality factor can be used to reflect specific radiation sources, thereby avoiding the phenomenon that detectors may have weak responses to sources and lead to waste of detectors in traditional detector layout schemes that rely on manual experience; the correlation between preferred detection points is evaluated by a correlation factor, and detection points with weak correlation can reflect different radiation sources, thereby avoiding the phenomenon that multiple detectors may be sensitive to the same radiation source and fail to take into account various radiation sources in traditional detector layout schemes that rely on manual experience.

[0161] The reader should understand that in the description of this specification, reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0162] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the method embodiments described above are merely illustrative. For example, the division of steps is merely a logical function division. In actual implementation, other division methods may be used. For example, multiple steps may be combined or integrated into another step, or some features may be ignored or not performed.

[0163] If the above method is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0164] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for determining detection points for radiation field monitoring, characterized in that: include: Step 1: obtaining physical information and geometric information of the radiation field, and calculating the detector response function of each radiation source based on the physical information and the geometric information; Step 2: determining the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and determining at least two preferred detection points among all the quality factors based on preset conditions; Step 3, calculating the correlation factor between any two preferred detection points; Step 4: Use the detection point confirmation method to process the correlation factor and obtain the final detection point; The step 2 is specifically as follows: The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is: Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources; The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points from all quality factors based on the preset condition; The step 4 is specifically as follows: The detection point confirmation method is: The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points; The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

2. The method for determining a radiation field monitoring detection point according to claim 1, wherein: The step 1 is specifically as follows: Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

3. The method for determining radiation field monitoring detection points according to claim 1, characterized in that: The step 3 is specifically as follows: The correlation factor INC(r1, r2) is calculated by the second formula, which is: Among them, f i (r1) is the response function of the ith radiation source at r1, f i (r2) is the response function of the i-th radiation source at r2.

4. A system for determining detection points for radiation field monitoring, characterized in that: include: an acquisition module, configured to acquire physical information and geometric information of the radiation field, and calculate a detector response function of each radiation source based on the physical information and the geometric information; a preliminary determination module, configured to determine the quality factor of each radioactive source at different spatial locations based on the detector response function of each radioactive source, and to determine at least two preferred detection points among all the quality factors based on preset conditions; A calculation module, used for calculating the correlation factor between any two preferred detection points; A final determination module is used to process the correlation factor using a detection point confirmation method to obtain a final detection point; The preliminary determination module is specifically used for: The quality factor FOM(r) of each radiation source at different spatial positions is calculated by the first formula, which is: Among them, f i (r) is the radiation source S i The detector response function at each position r in the entire space is: N is the number of radioactive sources; The preset condition is: arranging the quality factors in descending order, selecting the spatial positions corresponding to the radioactive sources corresponding to a preset number of selected quality factors as preferred detection points, and determining at least two preferred detection points from all quality factors based on the preset condition; The detection point confirmation method is: The two preferred detection points with the largest correlation factors are used as the first batch of final detection points, and all remaining preferred detection points that are not the first batch of final detection points are used as the set of points to be detected, respectively calculating the first correlation factor between each preferred detection point in the set of points to be detected and each of the first batch of final detection points, determining the sum of the correlation factors of each preferred detection point in the set of points to be detected based on the first correlation factor, determining the preferred detection point with the largest sum of the correlation factors as the new final detection point, and using the new final detection point and the two preferred detection points with the largest correlation factors as the new first batch of final detection points; The detection point confirmation method is repeated until the number of the new first batch of final detection points meets the preset requirement, and the new first batch of final detection points that meet the preset requirement are used as the final detection points.

5. The system for determining radiation field monitoring detection points according to claim 4, characterized in that: The acquisition module is specifically used for: Physical information and geometric information of the radiation field are obtained, a full-space particle transport model is constructed based on the physical information and the geometric information, and a detector response function of each radiation source is obtained by calculating the full-space particle transport model using a particle transport program, wherein the physical information includes parameters of each radiation source.

6. A storage medium, characterized in that The storage medium stores instructions, and when a computer reads the instructions, the computer is caused to execute a method for determining a radiation field monitoring detection point according to any one of claims 1 to 3.

7. An electronic device, characterized in that: The invention comprises the storage medium according to claim 6 and a processor for executing instructions in the storage medium.

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