Radioactive adaptive measurement method and measurement device

Abstract

The present invention discloses a radioactivity adaptive measurement method and a measuring device; the method comprises: arranging a radioactivity adjustment component between a radioactivity source and a radioactivity detector; setting the radioactivity adjustment component to be completely closed, and measuring a first radioactivity intensity of the radioactivity source with the radioactivity detector; comparing the measured first radioactivity intensity with a preset measurement threshold range; if the first radioactivity intensity is within the preset measurement threshold range, taking the first radioactivity intensity as the radioactivity measurement intensity of the radioactivity source; if the first radioactivity intensity is outside the preset measurement threshold range, adjusting the nuclear radiation intensity of the radioactivity source entering the detector to be within the preset measurement threshold range based on the relationship between the first radioactivity intensity and the preset measurement threshold range; then measuring the radioactivity intensity of the radioactivity source with the radioactivity detector to obtain the radioactivity measurement intensity of the radioactivity source; and calculating the actual radioactivity intensity of the radioactivity source based on the relationship between the radioactivity measurement intensity and the radioactivity shielding effect of the radioactivity adjustment component.

Description

Technical Field

[0001] The present application belongs to the field of radioactivity measurement technology, and specifically relates to a radioactivity adaptive measurement method and measurement device. Background Art

[0002] The rapid and large-scale development of nuclear power is creating an increasingly strong demand for instruments that measure radioactivity with a wide dynamic range. Currently, most detectors on the market utilize a combination of high- and low-efficiency detectors to achieve this wide dynamic range. While this combination achieves wide dynamic range radioactivity measurement, it also exposes the high-efficiency detector to strong radiation environments, making it difficult for the high-efficiency detector to survive even for a short period of time. This severely impacts the detector's measurement accuracy and service life. Summary of the Invention

[0003] In view of this, on one hand, the technical solution disclosed in some embodiments is a radioactive adaptive measurement method. The process of the radioactive adaptive measurement method is as follows, and the process includes:

[0004] (1) A radioactive regulation component is provided between the radioactive source and the radioactive detector;

[0005] (2) setting the radioactivity regulating component to a fully closed state and measuring a first radioactivity intensity of the radioactive source using a radioactivity detector;

[0006] (3) comparing the measured first radioactivity intensity with a preset measurement threshold range;

[0007] (4) if the first radioactivity intensity is within a preset measurement threshold range, the first radioactivity intensity is used as the radioactivity measurement intensity of the radioactive source;

[0008] If the first radioactivity intensity is outside the preset measurement threshold range, then, based on the relationship between the first radioactivity intensity and the preset measurement threshold range, adjusting the radioactivity intensity of the radioactive source entering the detector to be within the preset measurement threshold range, and then measuring the radioactivity intensity of the radioactive source using the radioactivity detector to obtain a measured radioactivity intensity of the radioactive source;

[0009] (5) Based on the relationship between the measured radioactivity intensity and the radioactive shielding effect of the radioactive regulating component, the actual radioactivity intensity of the radioactive source is calculated and determined.

[0010] Furthermore, in some embodiments of the radioactivity adaptive measurement method disclosed, the preset measurement threshold range is the linear measurement range of the radioactivity detector.

[0011] On the other hand, an apparatus for performing a radioactive adaptive measurement method is as follows, the apparatus comprising:

[0012] (1) Radioactive detection components, including radioactive detectors, used to measure the radioactive intensity of radioactive sources;

[0013] (2) an adjustable shielding assembly for regulating the amount of radiation from the radioactive source entering the radioactive detection assembly;

[0014] (3) a servo assembly configured to control the adjustable shielding assembly to adjust the amount of radiation entering the radioactive detection assembly;

[0015] (4) a control component, which is connected to the radiation detection component and the servo component, and is used to process the radiation intensity information measured by the radiation detector and control the servo component to control the adjustable shielding component;

[0016] In which, during the adaptive measurement of radioactivity, the control component compares the first radioactivity intensity measured by the radioactivity detector with a preset measurement threshold range. If the first radioactivity intensity is within the preset measurement threshold range, the first radioactivity intensity is used as the radioactivity measurement intensity of the radioactive source; if the first radioactivity intensity is outside the preset measurement threshold range, the control component controls the servo component to control the adjustable shielding component to adjust according to the relationship between the first radioactivity intensity and the preset measurement threshold range, adjusts the nuclear radiation intensity of the radioactive source entering the radiation detection component to be within the preset measurement threshold range, and controls the radioactivity detector to measure the radioactivity intensity of the radioactivity source to obtain the radioactivity measurement intensity of the radioactivity source; and calculates and determines the actual radioactivity intensity of the radioactivity source according to the relationship between the radioactivity measurement intensity and the radioactive shielding effect of the radioactivity adjustment component.

[0017] Furthermore, in the adaptive radioactivity measurement device disclosed in an embodiment of the present invention, the adjustable shielding assembly includes an adjustable collimating hole structure, so that the cross-sectional area of ​​the adjustable collimating hole structure can be adjusted as needed.

[0018] Preferably, the adaptive radiation measurement device disclosed in the embodiment of the present invention, the adjustable shielding assembly includes:

[0019] (1) Circular shell;

[0020] (2) an annular component, disposed inside the circular housing and rotatably connected to the inner wall thereof;

[0021] (3) a plurality of arcuate blades, wherein one end of each arcuate blade is rotatably connected to the inner wall of the circular shell and is rotatably connected to the annular component, and the plurality of arcuate blades partially overlap in sequence to form an adjustable collimating hole structure;

[0022] The annular component is rotated to adjust the cross-sectional size of the adjustable collimating hole structure.

[0023] Preferably, in the adaptive radioactivity measurement device disclosed in more embodiments of the present invention, the adjustable shielding assembly includes:

[0024] (1) Circular shell;

[0025] (2) an annular component, disposed inside the circular housing and rotatably connected to the inner wall thereof, with a mounting groove formed at a certain angle to the radial direction thereof being provided on the annular component;

[0026] (3) a plurality of arc-shaped blades, each of which is provided with two mounting shafts for mounting the arc-shaped blades in mounting grooves on the annular component;

[0027] When the annular component and the circular shell rotate relative to each other, the arc-shaped blades are driven to move so as to adjust the cross-sectional size of the adjustable collimating hole structure.

[0028] Preferably, in the adaptive radioactivity measurement device disclosed in some embodiments of the present invention, the angle between the mounting groove on the annular component and the radial direction of the annular component is an acute angle of 20 to 70 degrees.

[0029] Preferably, in the adaptive radiation measurement device disclosed in some embodiments of the present invention, the adjustable shielding assembly includes a thickness-adjustable structure.

[0030] Furthermore, in some embodiments of the present invention, the adaptive radiation measurement device disclosed herein may include an adjustable shielding assembly comprising:

[0031] (1) A square housing having a plurality of parallel openings on one side thereof;

[0032] (2) a square component, wherein a plurality of square components are sequentially arranged inside the square housing; wherein the plurality of square components are adapted to the shapes of the plurality of openings, and the number of the square components corresponds one to one; and the square components are configured to be movable in the openings corresponding thereto;

[0033] (3) A cylinder, which is connected to the square component and is configured to drive the square component to move in the opening adapted therewith under the control of the servo assembly.

[0034] Furthermore, in some embodiments of the present invention, the adaptive radiation measurement device disclosed herein may include an adjustable shielding assembly comprising:

[0035] (1) A square housing with an opening on one side;

[0036] (2) square components, a plurality of square components are placed at set positions in the storage box;

[0037] (3) a guide rail, arranged above the square housing;

[0038] (4) A movable gripper assembly is provided, which is movably connected to the guide rail and is used to grab a specific square component in the storage box and place it into the square shell.

[0039] The adaptive radioactivity measurement method and device disclosed in the embodiments of the present application can adaptively adjust the radiation intensity entering the radiation detector according to the radiation intensity of the radiation source, so as to adjust the radiation intensity within a reasonable intensity range to achieve accurate measurement of the radiation intensity of the radiation source by the high-efficiency radiation detector, protect the safe use of the high-efficiency radiation detector, and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Example 1 Schematic diagram of the composition of the radioactivity adaptive measurement device;

[0041] Figure 2 Schematic diagram of the structure of the adjustable shielding assembly in Example 2;

[0042] Figure 3 Schematic diagram of the structure of the adjustable shielding assembly in Example 3;

[0043] Figure 4 Schematic diagram of the structure of the annular component of Example 3;

[0044] Figure 5 Schematic diagram of the curved blade structure of Example 3;

[0045] Figure 6 Schematic diagram of the structure of the adjustable shielding assembly of Example 4;

[0046] Figure 7 Schematic diagram of the structure of the adjustable shielding assembly in Example 5;

[0047] Figure 8 Flowchart of a radioactivity adaptive measurement method according to an embodiment of the present invention.

[0048] Reference numerals

[0049] 1 Adjustable shielding assembly 2 Radioactive detection assembly

[0050] 3 Control components 4 Servo components

[0051] 11 curved blades 12 adjustable collimation hole structure

[0052] 13 Ring component 14 Round shell

[0053] 20 Radioactivity measurement area 21 Radioactivity detector

[0054] 111 Install axis 100 Radioactive source

[0055] 131 mounting slot 15 square housing

[0056] 16 Square component 17 Cylinder

[0057] 151 Opening 18 Storage Box

[0058] 19 Guide rail 191 Movable gripper assembly DETAILED DESCRIPTION

[0059] The term "embodiment" is used herein specifically to describe any embodiment as "exemplary," and should not be construed as superior or preferable to other embodiments. Performance indicators in the embodiments of this application were tested using conventional testing methods in the art, unless otherwise specified. It should be understood that the terms used in this application are intended solely to describe specific implementations and are not intended to limit the disclosure herein.

[0060] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0061] As used herein, the terms "substantially" and "approximately" are used to describe small fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data expressed or presented in range format herein are used for convenience and brevity only and should therefore be interpreted flexibly to include not only the values ​​explicitly listed as the limits of the range, but also all independent values ​​or subranges contained within the range. For example, a numerical range of "1-5%" should be interpreted to include not only the explicitly listed values ​​of 1% to 5%, but also the independent values ​​and subranges within the indicated range. Thus, included in this numerical range are independent values ​​such as 2%, 3.5%, and 4%, and subranges such as 1% to 3%, 2% to 4%, and 3% to 5%, etc. This principle also applies to ranges that only list a single value. Furthermore, this interpretation applies regardless of the width of the range or the characteristics described.

[0062] Throughout this document, including in the claims, transitional terms such as "comprises," "includes," "with," "having," "contains," "involving," and "accommodating" are understood to be open-ended, meaning "including but not limited to." Only the transitional terms "consisting of" and "composed of" are closed transitional terms.

[0063] In order to better illustrate the content of this application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that this application can be implemented without certain specific details. In the examples, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of this application.

[0064] Under the premise of no conflict, the technical features disclosed in the embodiments of this application can be combined arbitrarily, and the resulting technical solutions belong to the contents disclosed in the embodiments of this application.

[0065] In some embodiments, a radio-adaptive measurement method comprises:

[0066] A radioactive regulation component is provided between the radioactive source and the radioactive detector; the radioactive regulation component placed between the radioactive source and the radioactive detector can regulate the amount of nuclear radiation entering between the radioactive detector from the radioactive source, thereby preventing the radioactive detector from being directly exposed to a large dose of radiation field and causing damage to the detection head of the radioactive detector;

[0067] Generally, a radioactivity regulating assembly can limit the radioactivity of a radioactive source to a certain range. Within this range, it can be adjusted as needed to control the radioactivity intensity within a desired range, for example, within the linear measurement range of a radioactivity detector. This can accurately measure the radioactivity intensity of nuclear radiation and effectively protect the safety of the radioactivity detector, thereby extending its service life.

[0068] like Figure 8 As shown in step S101, the radioactivity regulating component is set to a fully closed state, and a radioactivity detector is used to pre-measure a first radioactivity intensity of the radioactive source. Generally, when the radioactivity regulating component is set to a fully closed state, the radioactivity shielding effect on the radioactive source is the best, and the radioactivity intensity radiated from the radioactive source to the radioactivity detector can be minimized to prevent damage to the reflective detector. In this case, the first radioactivity intensity obtained is generally the minimum radioactivity intensity detected by the radioactivity detector.

[0069] like Figure 8 As shown in step S102, the measured first radioactivity intensity is compared with a preset measurement threshold range;

[0070] If the first radioactivity intensity is within a preset measurement threshold range, the first radioactivity intensity is used as the radioactivity measurement intensity of the radioactive source;

[0071] like Figure 8 As shown in step S103, if the first radioactive intensity is outside the preset measurement threshold range, then according to the relationship between the first radioactive intensity and the preset measurement threshold range, the intensity of nuclear radiation from the radioactive source entering the second detector is adjusted to be within the preset measurement threshold range;

[0072] Then, the radioactivity intensity of the radioactive source is measured using a radioactivity detector to obtain the radioactivity measurement intensity of the radioactive source;

[0073] like Figure 8 As shown in step S104, the penetrability of the radiation source is determined. If the penetrability of the radiation source is strong, Figure 8 As shown in step S105, the actual radiation intensity of the radiation source is calculated based on the relationship between the radiation measurement intensity and the thickness of the radiation shielding component of the radiation regulating component; if the radiation source has weak penetrability, the actual radiation intensity of the radiation source is calculated based on the thickness of the radiation shielding component of the radiation regulating component. Figure 8 As shown in step S106, the actual radiation intensity of the radiation source is calculated and determined based on the relationship between the measured radiation intensity and the radiation shielding cross-sectional area of ​​the radiation regulating component.

[0074] As an optional embodiment, the radioactivity intensity is expressed as the maximum counting rate, and the preset measurement threshold range is located at the maximum counting rate limit n max and the minimum count rate limit n min The first radioactivity intensity of the radioactive source measured by the radioactivity detector is n; if n min ≤n≤n max , then the first radioactivity intensity n is taken as the radioactivity intensity measurement value; if n <n min , the radiation entering the radioactive detector is automatically adjusted to increase until n min ≤n≤n max , and then use the radioactive detector to measure the radioactive intensity to obtain the radioactive intensity measurement value; if n>n max , it is prohibited to start the radioactive detector.

[0075] As an optional embodiment, the preset measurement threshold range is the linear measurement range of the radioactivity detector. The radioactivity detector can accurately measure the radioactivity intensity within its linear measurement range.

[0076] Generally, radioactive detectors are high-efficiency detectors that can detect low radiation intensity, but have high detection sensitivity and strong accuracy. In order to achieve accurate detection of radioactive sources by high-efficiency detectors, the preset measurement threshold range is usually selected as its linear measurement range. The radioactive adaptive measurement method can be used to automatically adjust the amount of radiation entering the radioactive detector to the measurement threshold range, thereby achieving accurate measurement, improving the detection accuracy of the measurement method, and extending the service life of the high-efficiency detector.

[0077] In general, the radiation shielding effect of the radiation screen adjustment component is determined by the ratio of the radiation intensity of the radiation adjustment component to the actual reflective intensity of the radiation source, that is, the radiation shielding rate. The radiation shielding rate can be expressed as:

[0078] η=n / n s

[0079] Among them, η represents the radioactive shielding rate, n represents the radioactive intensity measurement, and n s Indicates the actual radioactivity intensity of the radioactive source;

[0080] Generally, the radiation shielding efficiency of the radiation shielding adjustment component needs to be calibrated so that the biomimetic shielding adjustment component in different states corresponds to a certain radiation shielding efficiency. Based on the radiation measurement intensity and the radiation shielding efficiency, the radiation intensity of the radiation source is calculated according to the following formula:

[0081] n s =n / η

[0082] In some embodiments, the adaptive radioactivity measurement device comprises:

[0083] Radioactive detection components, including radioactive detectors, for measuring the radioactive intensity of radioactive sources;

[0084] An adjustable shielding assembly is used to adjust the amount of radiation emitted by the radioactive source and entering the radioactive detection assembly. Generally, the adjustable shielding assembly is disposed outside the radioactive detection assembly and between the radioactive detection assembly and the radioactive source. The nuclear radiation generated by the radioactive source passes through the adjustable shielding assembly and enters the radioactive detection assembly, so that the radioactive detector can detect the intensity of the nuclear radiation entering the radioactive detection assembly.

[0085] Typically, the adjustable shielding assembly can adjust the intensity of the nuclear radiation passing through it by adjusting itself. For example, the adjustable shielding assembly is provided with a hole structure for the passage of nuclear radiation, and the amount of nuclear radiation passing through the hole structure is adjusted by adjusting the hole diameter or the hole cross-sectional area. Alternatively, the adjustable shielding assembly is provided with a structural component with adjustable thickness, and the amount of nuclear radiation passing through the structural component is adjusted by adjusting the thickness of the structural component.

[0086] Generally, the adjustable shielding assembly includes a structure or component made of a material that can shield radiation, or is made of a material that can shield radiation, so as to form a shielding effect against radiation, and the radiation intensity can be adjustable controlled by adjusting the adjustable shielding assembly to control the radiation dose through the adjustable shielding assembly;

[0087] A servo assembly is configured to control the adjustable shielding assembly to adjust the amount of radiation entering the radioactive detection assembly. Generally, the servo assembly is an automatic control assembly, which is interconnected with the adjustable shielding assembly and can adjust the adjustable shielding assembly at any time according to the instruction information to adjust the radiation amount.

[0088] a control component, arranged to be connected to the radioactive detection component and the servo component, for processing the pre-measurement information and the precise measurement information, and controlling the servo component to control the adjustable shielding component;

[0089] Generally, the control component includes an automatic servo control module and a radioactivity measurement module; the automatic servo control module is used to control the servo component, and the radioactivity measurement module is used to control the radioactivity measurement component, control the radioactivity detector to predict the measurement of the radioactive source, and process the radioactivity intensity measurement data, and determine the measurement procedure based on the relationship between the measurement data and the preset measurement threshold range. For example, if it is judged that the measured first radioactivity intensity data is within the preset measurement threshold range, the measured first radioactivity intensity is used as the radioactivity measurement value of the radioactivity source; if it is judged that the measurement data is outside the preset measurement threshold range, an instruction is issued to the servo component to adjust the adjustable shielding component so as to adjust the nuclear radiation intensity of the radioactive source entering the radiation detection component to be within the preset measurement threshold range, thereby controlling the radioactivity detector to accurately measure the radioactivity intensity of the radioactivity source.

[0090] As an optional embodiment, in the radioactivity adaptive measurement device, the radioactivity intensity measured by the radioactivity detector is expressed as a maximum counting rate, and the preset measurement threshold range is within the maximum counting rate limit n max and the minimum count rate limit n min The first radioactivity intensity of the radioactive source measured by the radioactive detector is n; if n min ≤n≤n max , then the first radioactivity intensity n is taken as the radioactivity intensity measurement value; if n <n min , the radiation entering the radioactive detector is automatically adjusted to increase until n min ≤n≤n max , and then use the radioactive detector to measure the radioactive intensity to obtain the radioactive intensity measurement value; if n>n max , it is prohibited to start the radioactive detector.

[0091] As an optional embodiment, in the adaptive radioactivity measurement device disclosed in some embodiments, the adjustable shielding assembly includes an adjustable collimating hole structure, and the cross-sectional area of ​​the adjustable collimating hole structure is configured to be adjustable.

[0092] Generally speaking, the amount of nuclear radiation passing through the adjustable collimating hole structure is proportional to the area of ​​the hole structure. The larger the area of ​​the hole structure, the greater the amount of nuclear radiation passing through and the greater the intensity of the nuclear radiation. The first radioactive intensity obtained by the radioactive detector when predicting the radioactive source is positively correlated with the area of ​​the adjustable collimating hole structure during measurement. The size of the first radioactive intensity can be adjusted accordingly by adjusting the cross-sectional area of ​​the collimating hole structure.

[0093] Generally, the shape of the adjustable collimating hole structure can be polygonal, circular or elliptical.

[0094] In some embodiments of the adaptive radiation measurement device disclosed herein, the adjustable shielding assembly includes:

[0095] round shell;

[0096] An annular component is disposed inside the circular shell and is rotatably connected to the inner wall thereof;

[0097] A plurality of arcuate blades, one end of each arcuate blade being rotatably connected to the inner wall of the circular shell and rotatably connected to the annular component, and the plurality of arcuate blades being partially overlapped in sequence to form an adjustable collimating hole structure;

[0098] When the circular shell and the annular component rotate relative to each other, the arc-shaped blades are driven to move to adjust the cross-sectional size of the adjustable collimating hole structure.

[0099] Typically, the curved blades are made of radiation-shielding materials to effectively shield nuclear radiation, allowing it to pass freely through the adjustable collimating apertures formed by the curved blades. Furthermore, the appropriate shielding material must be selected based on the type of radiation.

[0100] For example, acetic acid-vinyl acetate copolymer-based shielding materials, PbO / MWCNTs / EVA radiation shielding materials, PbO / CuO / EVA radiation shielding materials, B4C / ZB / MWCNTs / EVA flame-retardant neutron ray shielding materials; iron, tungsten, lead, lead-boron polyethylene and other gamma-ray shielding materials; metal lead, resin nano-lead and resin nano-lead composite materials, organic glass and other X-ray shielding materials; B4C, boron-containing radiation-proof fibers and other neutron shielding materials.

[0101] Generally, the servo assembly forms an independent servo subsystem that controls the adjustable shield. The servo assembly includes a controller, a power drive component, a feedback component, and a servo motor. The controller adjusts the control variable based on the relationship between a preset measurement threshold range and the first radioactivity intensity predicted by the radioactivity detector. The power drive component, serving as the servo assembly's main circuit, applies electrical energy to the servo motor based on the control variable, adjusting the servo motor's torque. It also provides the servo motor with the AC or DC power it requires. The servo motor then drives the adjustable shield based on the power supply, adjusting the amount of radiation passing through the adjustable shield.

[0102] The technical details are further illustrated below with reference to the embodiments and drawings.

[0103] Example 1

[0104] Figure 1 This is a schematic diagram of the composition of the radioactivity adaptive measurement device disclosed in Example 1.

[0105] In Example 1, the adaptive radiation measurement device includes an adjustable shielding assembly 1, which is connected to a servo assembly 4, which is connected to a control assembly 3. The adjustable shielding assembly 1 is provided with an adjustable collimating hole structure, and a radiation detection assembly 2 is provided at an appropriate position relative to the collimating hole structure. The radiation detection assembly 2 includes a radiation detector 21 provided at its end.

[0106] When the adaptive radioactivity measurement device is used to measure the radioactivity parameters of a radioactive source 100, the radioactive source 100 is placed at an appropriate position in the adaptive radioactivity measurement device so that the adjustable shielding component 1 is located between the radioactive source 100 and the radioactivity measurement component 2, so that the radioactivity measurement area 20 formed after the radiation emitted by the radioactive source 100 passes through the adjustable shielding component 1 is adapted to the radioactivity measurement component 2, so that the radioactivity detector 21 is within the radioactivity measurement area 20 and can measure the radiation in the area.

[0107] Example 2

[0108] In the radioactivity adaptive measurement device disclosed in Example 2, Figure 2 As shown, the adjustable shielding assembly includes a circular shell 14, which is generally cylindrical and has an annular component 13 rotatably connected to its inner surface. A plurality of arcuate blades 11 are disposed within the circular shell 14, each of which is rotatably connected to the inner surface of the circular shell 14 at one end. The annular component 13 is rotatably connected to each of the arcuate blades 11. The multiple arcuate blades overlap one another to form an adjustable collimating aperture 12 at the center. When the circular shell 14 and the annular component 13 rotate relative to each other, the arcuate blades rotate in the same direction, forming a collimating aperture with an adjustable cross-sectional area. When the adjustable shielding assembly is placed next to a radiation source 100, radiation emitted by the radiation source 100 passes through the adjustable collimating aperture 12, forming a radiation measurement region 20 compatible with the radiation measurement assembly. As the cross-sectional area of ​​the adjustable collimating aperture 12 changes, the radiation measurement region 20 changes accordingly.

[0109] Example 3

[0110] In the radioactivity adaptive measurement device disclosed in Example 3, Figure 3 、 Figure 4 、 Figure 5As shown, the adjustable shielding assembly includes a circular housing 14, which is generally annular and rotatably connected to an annular component 13 disposed therein. The annular component is provided with a plurality of mounting slots 131 at a predetermined angle to its radial direction, in which arcuate blades 11 are mounted. Each arcuate blade is provided with two mounting shafts 111 for mounting the arcuate blade 11 in the mounting slots 131 of the annular component 13. The mounting shafts 111 mounted in the mounting slots 131 are freely movable therein. The multiple arcuate blades 11 overlap one another to form an adjustable collimating hole structure 12 at the center. When the circular housing 14 and the annular component 13 rotate relative to each other, the arcuate blades 11 rotate in the same direction, forming the adjustable collimating hole structure 12. When the adjustable shielding assembly is placed on one side of a radiation source 100, the radiation emitted by the radiation source 100 passes through the adjustable collimating hole structure 12, forming a radiation measurement area 20 adapted to the radiation measurement assembly. When the cross-sectional area of ​​the adjustable collimating hole structure 12 changes, the radiation measurement area 20 changes accordingly.

[0111] The angle between the mounting groove 131 and the radial direction of the annular component is α;

[0112] The mounting groove 131 can be provided as a recessed groove on the surface of the annular component, or as a through groove penetrating the upper and lower surfaces of the annular component;

[0113] The arc-shaped blade 11 is a sheet-like structure with different curvatures on both sides. Generally, the two side surfaces of the sheet-like structure are arc-shaped, wherein the curvature directions of the arcs on the two side surfaces are the same but the curvatures of the arcs are different.

[0114] Example 4

[0115] In the radioactivity adaptive measurement device disclosed in this embodiment 4, Figure 6 As shown, the adjustable shielding assembly includes a square shell 15, which is generally in the shape of a rectangular parallelepiped. A plurality of parallel openings 151 are provided on its upper side surface. A plurality of square components 16 are provided inside the square shell 15. The plurality of square components 16 are perpendicular to the upper side surface of the square shell 15 and correspond one-to-one with the plurality of openings 151 provided on the upper side surface. The shape of the opening corresponding to each square component 16 is adapted to the shape of the square component so that the square component moves in the corresponding opening. Each square component 16 is connected to a cylinder 17, and the square component 16 moves up and down in the corresponding opening under the drive of the cylinder 17.

[0116] The inner sides of the front and rear side panels of the square housing 15 are provided with guide grooves adapted to the square components. The number, position and shape of the guide grooves are adapted to the number, position and shape of the square components so that the square components can move in the guide grooves and stabilize their position inside the square housing.

[0117] Each cylinder independently controls the corresponding square component. Multiple square components are combined in a variety of ways in the square shell to form square component assemblies with different thicknesses. Square component assemblies with different thicknesses have different radiation shielding effects on the radiation source, thereby achieving the adjustment of radiation intensity.

[0118] The square component is made of radioactive shielding material so as to have a shielding effect against nuclear radiation;

[0119] The multiple cylinders 17 drive the corresponding square components to move up and down under the control of the servo assembly, and the square components located inside the square shell can be combined in various ways; Figure 6 As shown, the square components on the left and right sides are located in the shell to form a shield against radioactivity, and the square component in the middle moves upward to a set position and has no shielding effect on radioactivity.

[0120] Example 5

[0121] In the radioactivity adaptive measurement device disclosed in this embodiment 5, Figure 7 As shown, the adjustable shielding assembly includes a square housing 15, which is generally rectangular in shape and has an opening on its upper side. A square component 16 can enter the interior of the square housing through the opening. The square components 16 are usually provided in plurality and are placed in a storage box 18 according to a set order and position, with the square components 16 corresponding to the positions in the storage box 18. The guide rails 19 are a set of parallel linear guide rails arranged above the square housing 15. A movable gripper assembly 191 is connected to the guide rails 19 and can move linearly along the guide rails under the drive of a servo assembly. The end of the movable gripper assembly 191 is a gripper for grasping the square components.

[0122] The square component is made of radioactive shielding material so as to have a shielding effect on nuclear radiation. The plurality of square components have different shielding effects, so that a square component with a suitable shielding effect can be selected for radioactivity measurement.

[0123] The movable gripper assembly 191 moves on the guide rail under the control of the servo assembly, moves to the top of the selected square component 16 in the storage box according to the instruction, then grabs the selected square component 16, and moves to the opening on the upper side of the square shell, and places the square component into the opening to enter the interior of the square shell; when the measurement is completed and the square component needs to be replaced, it is put back into the storage box in the reverse order; then the appropriate square component is grabbed from the storage box and placed inside the square shell.

[0124] In order to adjust the setting direction of the square component, the gripper can be set as a rotatable component, which can be rotated in a horizontal plane to adjust the direction of the square component.

[0125] The adaptive radioactivity measurement method and device disclosed in the embodiments of the present application can adaptively adjust the radiation intensity entering the radiation detector according to the radiation intensity of the radiation source, so as to adjust the radiation intensity within a reasonable intensity range to achieve accurate measurement of the radiation intensity of the radiation source by the high-efficiency radiation detector, protect the safe use of the high-efficiency radiation detector, and extend its service life.

[0126] The technical solutions disclosed in this application and the technical details disclosed in the embodiments are merely illustrative of the inventive concept of this application and do not constitute a limitation on the technical solutions of this application. Any conventional changes, replacements or combinations of the technical details disclosed in this application have the same inventive concept as this application and are within the scope of protection of the claims of this application.

Claims

1. A radioactive adaptive measurement method, characterized in that: The method includes: A radioactivity regulating component is provided between the radioactive source and the radioactivity detector; Setting the radioactivity regulating component to a fully closed state and measuring a first radioactivity intensity of the radioactive source with the radioactivity detector; Comparing the measured first radioactivity intensity with a preset measurement threshold range; the preset measurement threshold range is a linear measurement range of the radioactivity detector; If the first radioactivity intensity is within the preset measurement threshold range, taking the first radioactivity intensity as the radioactivity measurement intensity of the radioactive source; If the first radioactivity intensity is outside the preset measurement threshold range, adjusting the radioactivity intensity of the radioactive source entering the radioactivity detector to be within the preset measurement threshold range based on the relationship between the first radioactivity intensity and the preset measurement threshold range; and then measuring the radioactivity intensity of the radioactivity source using the radioactivity detector to obtain a measured radioactivity intensity of the radioactivity source; The actual radioactivity intensity of the radioactive source is calculated based on the relationship between the radioactivity measurement intensity and the radioactivity shielding effect of the radioactivity regulating component; the calculation formula is: n s =n / n; Among them, η represents the radioactive shielding rate, n represents the radioactive intensity measurement, and n s Indicates the actual radioactivity intensity of the radioactive source.

2. A radioactive adaptive measurement device for implementing the radioactive adaptive measurement method according to claim 1, characterized in that: The device includes: Radioactive detection components, including radioactive detectors, for measuring the radioactive intensity of radioactive sources; an adjustable shielding assembly for adjusting the amount of radiation from the radioactive source entering the radioactive detection assembly; a servo assembly configured to control the adjustable shielding assembly to adjust the amount of radiation entering the radioactive detection assembly; a control component, arranged to be connected to the radiation detection component and the servo component, and configured to process the radiation intensity information measured by the radiation detector and control the servo component to control the adjustable shielding component; In the adaptive radioactivity measurement process, the control component compares the first radioactivity intensity predicted by the radioactivity detector with a preset measurement threshold range. If the first radioactivity intensity is within the preset measurement threshold range, the first radioactivity intensity is used as the radioactivity measurement intensity of the radioactive source; if the first radioactivity intensity is outside the preset measurement threshold range, the control component controls the servo component to control the adjustable shielding component to adjust according to the relationship between the first radioactivity intensity and the preset measurement threshold range, so as to adjust the nuclear radiation intensity of the radioactive source entering the radioactivity detection component to be within the preset measurement threshold range, and controls the radioactivity detector to measure the radioactivity intensity of the radioactive source to obtain the radioactivity measurement intensity; The control component calculates and determines the actual radiation intensity of the radiation source according to the relationship between the measured radiation intensity and the radiation shielding effect of the radiation regulating component.

3. The radioactivity adaptive measurement device according to claim 2, characterized in that: The adjustable shielding assembly includes an adjustable collimating hole structure, and the cross-sectional area of ​​the adjustable collimating hole structure is set to be adjustable.

4. The radioactivity adaptive measurement device according to claim 3, characterized in that: The adjustable shielding assembly comprises: round shell; An annular component is disposed inside the circular shell and is rotatably connected to the inner wall thereof; a plurality of arc-shaped blades, one end of each of the arc-shaped blades being rotatably connected to the inner wall of the circular shell and rotatably connected to the annular component, wherein the plurality of arc-shaped blades partially overlap in sequence to form the adjustable collimating hole structure; When the annular component and the circular shell rotate relative to each other, the arc-shaped blades are driven to move so as to adjust the cross-sectional size of the adjustable collimating hole structure.

5. The radioactivity adaptive measurement device according to claim 3, characterized in that: The adjustable shielding assembly comprises: round shell; An annular component is disposed inside the circular shell and is rotatably connected to the inner wall thereof; the annular component is provided with a mounting groove which is at a certain angle to the radial direction thereof; A plurality of arc-shaped blades, each of which is provided with two mounting shafts for mounting the arc-shaped blades in the mounting grooves on the annular component; When the annular component and the circular shell rotate relative to each other, the arc-shaped blades are driven to move so as to adjust the cross-sectional size of the adjustable collimating hole structure.

6. The radioactivity adaptive measurement device according to claim 5, characterized in that: The included angle between the mounting groove and the radial direction of the annular component is an acute angle of 20 to 70 degrees.

7. The radioactivity adaptive measurement device according to claim 2, characterized in that: The adjustable shielding assembly comprises: A square housing, one side of which is provided with a plurality of parallel openings; A square component, wherein a plurality of the square components are sequentially arranged inside the square housing; wherein the plurality of the square components are adapted to the shapes of the plurality of the openings, respectively, and correspond one to one; and the square components are configured to move in the openings corresponding thereto; A cylinder is connected to the square component, and the cylinder is configured to drive the square component to move in the opening adapted therewith under the control of the servo assembly.

8. The radioactivity adaptive measurement device according to claim 2, characterized in that: The adjustable shielding assembly comprises: A square shell, one side of which is provided with an opening; Square components, a plurality of square components are placed at set positions in the storage box; the square components are configured to be placed into the interior of the square shell through the opening; A guide rail is arranged above the square shell; A movable gripper assembly is arranged to be movably connected to the guide rail and is used for grabbing a selected square component in the storage box and placing it into the interior of the square shell.

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