A seat-type radioactive internal contamination measuring device and system

Abstract

The application relates to a seat type radioactive internal contamination measuring device and system, which comprises a seat structure for a detected person to sit and stand, a detector structure for detecting the type and content of radioactive substances in the body of the detected person, a trunk detector shielding body arranged in an elliptical table shape, a thyroid gland detector shielding body arranged in a cylindrical shape, a center axis of the cylindrical shape being parallel to the ground, a positioning structure connected with the trunk detector shielding body and the thyroid gland detector shielding body, used for adjusting the height and angle of the trunk detector shielding body and the thyroid gland detector shielding body, and a movable platform used for moving the above structure. The application achieves the setting of the trunk detector shielding body and the thyroid gland detector shielding body structure, can measure the thyroid gland part and the trunk part, and sets the movable platform, so that the measuring device can be flexibly moved and is suitable for the scene of on-site emergency carrying and moving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ionizing radiation monitoring and protection, and particularly relates to a seat type radioactive internal contamination measuring device and system. BACKGROUND

[0002] In radioactive practice activities, such as nuclear fuel cycle, nuclear technology research, production and use of radioisotopes, gaseous or volatile radioactive material operation, and nuclear facility decommissioning, and even in the case of nuclear accidents, radionuclides can enter the human body through inhalation, ingestion, wounds or skin, thereby causing radioactive internal contamination and causing radioactive irradiation to the human body. In order to ensure the effectiveness of radiation protection and protect the health of personnel, internal irradiation monitoring of radioactive occupational personnel is required, and in the case of radioactive accidents or other special irradiation, internal irradiation monitoring of the public who may be contaminated also needs to be considered.

[0003] Methods of internal irradiation monitoring mainly include direct measurement and indirect measurement. Among them, direct measurement refers to directly measuring the content of radioactive substances in the human body by using an external detection system, and for internal irradiation monitoring, direct measurement is usually preferred. At present, internal irradiation measurement systems are mainly used for conventional measurement, and the measurement forms are mainly standing type and bed type, etc. For example, the standing type measurement system mainly uses a large volume detector, and the detection efficiency is relatively high; the bed type measurement system has a complex structure, and the background is low, and can be used for low level radioactive measurement.

[0004] However, the above two types of measurement systems have complex structure, large size, are inconvenient to move, cannot be used for on-site emergency measurement, and have high cost, which is not conducive to popularization, in addition, the direct measurement method in the prior art can only be used for whole body measurement, and cannot be used for accurate local measurement, and has certain use limitations.

[0005] The above problems need to be solved. SUMMARY

[0006] The present application discloses a seat type radioactive internal contamination measuring device and system, which aims to solve the technical problems existing in the prior art.

[0007] The present application adopts the following technical scheme:

[0008] In one aspect, the present application provides a seat type radioactive internal contamination measuring device, comprising: a seat structure for a detected person to sit on; a detector structure for detecting the type and content of radioactive material in the detected person's body; a torso detector shield body arranged towards the direction in which the detected person sits, in an elliptical table shape; the torso detector shield body comprises a first end and a second end with a larger diameter than the first end, the first end is arranged towards the detector structure, and the second end is arranged towards the detected person, the torso detector shield body is used to shield radioactive material in a radiation environment; a thyroid detector shield body arranged towards the direction in which the detected person sits and higher than the torso detector shield body, in a cylindrical shape, the central axis of the cylindrical shape is parallel to the ground, one end of the cylindrical shape is fixedly connected to the detector structure, and the thyroid detector shield body is used to shield radioactive material in the radiation environment; a positioning structure connected to the torso detector shield body and the thyroid detector shield body, for adjusting the height and angle of the torso detector shield body and the thyroid detector shield body; a movable platform, the seat structure, the detector structure, the torso detector shield body, the thyroid detector shield body and the positioning structure are all installed on the movable platform, and the movable platform is used to move the seat structure, the detector structure, the torso detector shield body, the thyroid detector shield body and the positioning structure.

[0009] Optionally, the seat structure comprises: a seat parallel to the ground for the detected person to sit on; a backrest perpendicular to the seat for shielding radioactive material behind the detected person; a support frame connected between the seat and the movable platform for supporting the seat and adjusting the height of the seat.

[0010] Optionally, the seat and the backrest are both made of lead plate material, a stainless steel shell is wrapped outside the lead plate material, and the surface of the stainless steel shell on the side of the seat towards the detector structure and the surface of the stainless steel shell on the side of the backrest towards the detector structure are both covered with copper plate.

[0011] Optionally, the detector structure comprises: a torso detector selected from a high-purity germanium detector or a sodium iodide detector; a thyroid detector selected from a cadmium zinc telluride detector or a sodium iodide detector.

[0012] Optionally, the torso detector shield body is made of lead plate material, and a stainless steel shell is arranged outside the lead plate material; the thyroid detector shield body is made of lead plate material, and a stainless steel shell is arranged outside the lead plate material.

[0013] Optionally, the positioning structure comprises: a vertical column installed on the movable platform and perpendicular to the ground; a horizontal platform installed on the vertical column and parallel to the ground; a traction screw arranged on the horizontal platform; a ring-shaped guide rail gear connected with the traction screw, the trunk detector shield being nested in the ring-shaped guide rail gear; a screw knob arranged on the traction screw, and rotation of the screw knob adjusting an inclination angle of the ring-shaped guide rail gear; and a ring-shaped guide rail gear knob arranged outside the ring-shaped guide rail gear, and rotation of the ring-shaped guide rail gear knob controlling self-rotation of the ring-shaped guide rail gear along a central axis.

[0014] Optionally, the positioning structure further comprises: a horizontal column installed on the vertical column and perpendicular to the vertical column and parallel to the ground, the thyroid detector shield being embedded on the horizontal column; a rack slide rail nested in a groove of the vertical column and connected with the horizontal column; a rack slide adjustment knob installed on the rack slide rail, and rotation of the rack slide adjustment knob driving the horizontal column to move along an axial direction of the vertical column; a slide rail arranged on a surface of the horizontal column and penetrating through the horizontal column to connect the thyroid detector shield with an external environment, the slide rail being parallel to the ground; and a slide adjustment knob penetrating through the slide rail and fixedly connected with the thyroid detector shield, and movement of the slide adjustment knob driving the thyroid detector shield to move along an axial direction of the horizontal column.

[0015] Optionally, the movable platform comprises: a stainless steel plate plane for installing the seat structure, the detector, the trunk detector shield, the thyroid detector shield and the positioning structure; a support framework arranged at a bottom of the stainless steel plate plane and used for supporting the stainless steel plate plane; and a plurality of universal wheels installed below the support framework and used for moving the stainless steel plate plane.

[0016] According to another aspect of the embodiment of the present application, a seat-type radioactive internal pollution measuring system is further provided, comprising: a measuring module applied to the seat-type radioactive internal pollution measuring device and used for obtaining measuring data, wherein the measuring data is a pulse signal; a digital multi-channel analyzer connected with the measuring module and used for converting the pulse signal into map data; and a computer device connected with the digital multi-channel analyzer and used for receiving the map data and analyzing the map data to obtain a measuring result.

[0017] Optionally, the computer device comprises: a spectrum analysis module connected with the digital multi-channel analyzer, configured to analyze the spectrum data, and confirm the nuclide type and the nuclide activity; a multi-body detection efficiency correction module, configured to preset detection efficiency data and a detection efficiency curve of a plurality of body types, and perform fitting calculation based on the body parameters of the detected person to determine the detection efficiency value, wherein the plurality of body types are used to indicate different height and weight of the population; a dose estimation module connected with the spectrum analysis module and the multi-body detection efficiency correction module, configured to calculate the internal exposure dose of the detected person according to the nuclide type, the nuclide activity and the detection efficiency value, and obtain the measurement result; and a data management module connected with the dose estimation module, configured to store the measurement result in a preset data management format, and export and display the measurement result.

[0018] The technical scheme adopted by the present application can achieve at least one of the following beneficial effects:

[0019] In the embodiment of the present application, by adopting the above scheme, the trunk detector shielding body and the thyroid detector shielding body structure are set, local measurement of the thyroid part and the trunk part can be performed, a movable platform is arranged, the measurement device can be flexibly moved, and the purpose of on-site emergency carrying and moving is achieved, thereby realizing the technical effects of local measurement and convenient carrying and moving, and further solving the technical problems of the related art that the measurement system structure is complex, inconvenient to move, cannot be used for on-site emergency measurement, the direct measurement method is mainly used for whole body measurement, local measurement cannot be performed, and there is a certain use limitation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows, which constitutes a part of the present application. The schematic embodiments of the present application and the description and explanation thereof do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a structure diagram of a seat type radioactive internal contamination measurement device in embodiment 1 of the present application;

[0022] Figure 2 is a positioning structure schematic diagram of a seat type radioactive internal contamination measurement device in embodiment 1 of the present application;

[0023] Figure 3 is a structure schematic diagram of a seat type radioactive internal contamination measurement system in embodiment 2 of the present application.

[0024] Explanation of reference signs:

[0025] 1. seat structure; 11, seat; 12, backrest; 13, support frame;

[0026] 21, torso detector shield; 22, thyroid detector shield;

[0027] 3, positioning structure; 31, vertical column; 32, traction screw; 33, ring rail gear; 34, horizontal column; 35, slide rail; 36, slide adjustment knob; 37, moving chain; 38, gear; 39, horizontal platform; 321, screw knob; 331, ring rail gear knob; 311, rack slide rail; 312, rack slide adjustment knob;

[0028] 4, movable platform; 41, stainless steel plate plane; 42, universal wheel. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with specific embodiments of the present application and corresponding drawings. In the description of the present application, it should be noted that the term "or" is generally used in the sense of including "and / or", unless the context clearly indicates otherwise.

[0030] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or magnetic connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three or more, unless otherwise explicitly specified and limited.

[0031] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0032] First, in order to facilitate the understanding of the embodiments of the present application, the following will explain and describe some terms or nouns involved in the present application:

[0033] Internal radioactive contamination refers to the contamination of the human body caused by the intake of radionuclides through inhalation, ingestion, and wounds. It can be measured and evaluated through air sampling, biological sample detection, or direct in-vitro measurement.

[0034] Detector refers to a device capable of detecting the content and distribution of radioactive substances in the human body or environment.

[0035] Detector shielding body is a device used to weaken or block the influence of external ionizing radiation and other interference sources on the performance of the detector. It is usually made of metal materials.

[0036] Multi-body refers to a group of people with different body parameters such as body size, height, and weight. These body parameters can significantly affect the detection efficiency of the detector, as different body sizes can lead to diverse distribution of radioactive substances and different absorption and blocking effects of radioactive rays.

[0037] To solve the problems existing in the prior art, the present application provides a seat-type internal radioactive contamination measuring device and system.

[0038] Embodiment 1

[0039] This embodiment provides a seat-type internal radioactive contamination measuring device, as shown in Figure 1 , Figure 1 is a structural diagram of a seat-type internal radioactive contamination measuring device in Embodiment 1 of the present application. The measuring device includes:

[0040] The seat structure 1 is used for the detected person to sit; the detector structure is used for detecting the type and content of radioactive substances in the detected person's body; the torso detector shielding body 21 is arranged towards the direction in which the detected person sits, and is arranged in an elliptical table shape; the torso detector shielding body 21 comprises a first end and a second end with a larger diameter than the first end, the first end is arranged towards the direction of the detector structure, and the second end is arranged towards the direction of the detected person; the torso detector shielding body 21 is used for shielding radioactive substances in a radiation environment; the thyroid detector shielding body 22 is arranged towards the direction in which the detected person sits, and is higher than the torso detector shielding body 21, and is arranged in a cylindrical shape, the central axis of the cylindrical shape is parallel to the ground, one end of the cylindrical shape is fixedly connected with the detector structure, and the thyroid detector shielding body 22 is used for shielding radioactive substances in a radiation environment; the positioning structure 3 is connected with the torso detector shielding body 21 and the thyroid detector shielding body 22, and is used for adjusting the height and angle of the torso detector shielding body 21 and the thyroid detector shielding body 22; the movable platform 4 is used for moving the seat structure 1, the detector structure, the torso detector shielding body 21, the thyroid detector shielding body 22 and the positioning structure 3.

[0041] Based on the above structure, the detected person sits on the seat structure 1, when the measurement object is the chest or abdomen of the torso, because the torso is wide, the long axis of the elliptical table-shaped torso detector shielding body 21 can be arranged parallel to the ground, and the angle of the torso detector shielding body 21 can be adjusted through the traction screw 32 and the screw knob 321, moreover, the short axis of the elliptical table-shaped torso detector shielding body 21 can limit the longitudinal field of view of the detector, so that the detection field of view of the detector corresponds to the chest or abdomen of the human body more accurately, finally, the torso, the torso detector shielding body 21 and the detector structure form a closed body, effectively realizing the effect of measuring radioactive substances in the local area of the torso, and breaking the limitation of the use of the device.

[0042] Optionally, when the measurement object is the whole human body, in order to ensure a larger longitudinal field of view of the detector to cover the whole human body as much as possible, the torso detector shielding body 21 can be rotated by 90 degrees through the ring guide rail gear 33 and the ring guide rail gear knob 331, and the angle of the torso detector shielding body 21 can be adjusted through the traction screw 32 and the screw knob 321, so that the short axis of the elliptical table-shaped torso detector shielding body 21 is parallel to the ground, and the long axis forms a specific angle with the ground, finally, the human body, the torso detector shielding body 21 and the detector structure form a closed body, effectively realizing the effect of measuring radioactive substances in the whole human body.

[0043] Optionally, the trunk detector shield 21 can also be in the shape of a circular truncated cone. When the major axis of the elliptical truncated cone is equal to the minor axis, the trunk detector shield 21 becomes a circular truncated cone. In practical applications, the trunk detector shield 21 is usually in the shape of an elliptical truncated cone.

[0044] Optionally, since the thyroid part is located above the trunk, the thyroid detector shield 22 is arranged above the trunk detector shield 21, effectively corresponding to the part to be measured in the human body. The area of the thyroid part is not large, and can correspond to the area of the detector, so it does not need to be in the shape of an elliptical truncated cone, but only needs to be in the shape of a cylinder. The person to be detected places the thyroid part at one end of the cylindrical shape, and the other end of the cylindrical shape is fixedly connected to the detector structure, so as to form a closed space, effectively realizing the effect of measuring the local area of the thyroid.

[0045] Optionally, the structure of the trunk detector shield 21 can also be in the shape of a horn, that is, the main body is in the shape of a cylindrical shield for shielding the incident rays on the side and rear end of the detector structure. The position close to the person to be detected is designed in the shape of a horn for limiting the measurement range. Since the thyroid measurement is a close-range measurement, the structure of the thyroid detector shield 22 is in the shape of a cylinder, that is, for shielding the incident rays on the side and rear end of the detector structure, and also for limiting the measurement range.

[0046] Optionally, since the heights of different persons to be detected are different, the positions of the thyroid detector shield 22 and the trunk detector shield 21 need to be adjusted by the positioning structure 3 to adapt to more people.

[0047] Optionally, the seat-type radioactive internal contamination measuring device can be installed on the movable platform 4, which facilitates the movement of the measuring device to the desired measurement position, effectively realizing the effect that the measuring device can be flexibly moved and is suitable for on-site emergency handling and movement.

[0048] In a preferred embodiment, the seat structure 1 comprises: a seat 11 parallel to the ground for the person to be detected to sit on; a backrest 12 perpendicular to the seat 11 for shielding radioactive substances behind the person to be detected; and a support frame 13 connected between the seat 11 and the movable platform 4 for supporting the seat 11 and adjusting the height of the seat 11.

[0049] Optionally, the seat structure 1 is used for the person to be detected to sit on, that is, the person to be detected sits on the seat 11 to perform the measurement. The backrest 12 is arranged at the rear end of the seat 11, and the backrest 12 is supported by a plurality of steel structures. The person to be detected can sit on the seat 11 and lean on the backrest 12. At the same time, the backrest 12 can shield the radioactive substances behind, thereby reducing the influence of the radioactive substances on the measurement result. The support frame 13 is arranged between the seat 11 and the movable platform 4, effectively enhancing the stability and adjustability of the seat 11.

[0050] In a preferred embodiment, the seat 11 and the backrest 12 are made of lead plate material, and the outside of the lead plate material is wrapped with a stainless steel shell. The surface of the stainless steel shell on the side of the seat 11 facing the detector structure and the surface of the stainless steel shell on the side of the backrest 12 facing the detector structure are both covered with copper plate.

[0051] Alternatively, the seat 11 and the backrest 12 are designed in the form of lead plate wrapped in a stainless steel shell, that is, the stainless steel plate is first bent and welded to form a cavity of a certain size, then the lead plate is tightly stacked in the cavity, and finally the stainless steel plate is used for covering. In addition, the seat 11 and the backrest 12 each cover a layer of copper plate on the side facing the detector structure.

[0052] Alternatively, the main part of the seat 11 and the backrest 12 is made of lead plate material. Lead is a metal with high density and large atomic number, which has good shielding effect on X-ray, γ-ray and other radiation. Therefore, in order to better shield radioactive substances, the seat 11 and the backrest 12 are made of lead plate. Stainless steel is a kind of alloy steel with corrosion resistance and high strength, which has excellent physical and chemical stability. This layer of stainless steel shell not only increases the structural strength of the seat 11 and the backrest 12, but also provides an attractive appearance and an easy-to-clean surface. At the same time, stainless steel also has a certain shielding effect on radiation. Copper can be used to absorb γ-rays and β-rays produced by bremsstrahlung of radioactive lead isotopes, further improving the shielding effect. Therefore, the surface of the stainless steel shell on the side of the seat 11 facing the detector structure and the surface of the stainless steel shell on the side of the backrest 12 facing the detector structure are additionally covered with copper plate.

[0053] Alternatively, the seat 11 and the backrest 12 made in the above manner can shield a variety of radioactive substances to a greater extent, effectively shielding radioactive substances in the environment.

[0054] In a preferred embodiment, the detector structure includes: a torso detector, which is selected from a high-purity germanium detector or a sodium iodide detector; a thyroid detector, which is selected from a cadmium zinc telluride detector or a sodium iodide detector.

[0055] Alternatively, the torso detector part can be selected from a high-purity germanium detector to provide better energy resolution and low-energy γ-ray measurement capability. High-purity germanium (HPGe) is a high-performance semiconductor material with high sensitivity and high energy resolution. High energy resolution allows it to distinguish between different energy radiation, reducing false positives and false negatives. High sensitivity allows it to effectively measure at low radiation levels. At the same time, its crystal structure makes it very sensitive to γ-rays and other radiation, allowing accurate measurement of radiation energy and intensity.

[0056] Optionally, the thyroid detector part can be selected with a cadmium zinc telluride detector to provide better energy resolution and measurement capability for low-energy gamma rays; cadmium zinc telluride (CZT) is a compound semiconductor material with excellent electrical and radiation detection performance. It has high charge collection efficiency and low noise level, making it excellent in gamma and X-ray detection. High charge collection efficiency makes the detector more responsive and accurate to radiation, and low noise level helps to improve the signal-to-noise ratio of the collected pulse signal, making the collected pulse signal clearer. In the process of radioactive measurement imaging, cadmium zinc telluride detectors are commonly used in X-ray computed tomography (CT) and positron emission tomography (PET) imaging technologies to provide high-quality pulse signal imaging. Especially in thyroid imaging, due to the high sensitivity of cadmium zinc telluride detectors to low-energy X-rays and gamma rays, the structure and function of the thyroid can be displayed more clearly.

[0057] In a preferred embodiment, the trunk detector shielding body 21 is made of lead plate material, and a stainless steel shell is provided outside the lead plate material; the thyroid detector shielding body 22 is made of lead plate material, and a stainless steel shell is provided outside the lead plate material.

[0058] Optionally, the trunk detector shielding body 21 and the thyroid detector shielding body 22 are both in the form of lead-encased stainless steel shells, which can effectively shield the background radiation interference outside the measured human body; moreover, the trunk detector shielding body 21 and the thyroid detector shielding body 22 respectively define the spatial measurement range of the detector structure together with the detected person, that is, they can cover different body types of the measured person and are not directly irradiated by the radiation outside the shielding body.

[0059] In a preferred embodiment, the positioning structure 3 includes: a vertical column 31 installed on the movable platform 4 and perpendicular to the ground; a horizontal platform 39 installed on the vertical column 31 and parallel to the ground; a traction screw 32 provided on the horizontal platform 39; a ring-shaped guide rail gear 33 connected with the traction screw 32, the trunk detector shielding body 21 being nested in the ring-shaped guide rail gear 33; a screw knob 321 provided on the traction screw 32, rotating the screw knob 321 can adjust the inclination angle of the ring-shaped guide rail gear 33; a ring-shaped guide rail gear knob 331 provided outside the ring-shaped guide rail gear 33, rotating the ring-shaped guide rail gear knob 331 can control the ring-shaped guide rail gear 33 to rotate around the central axis and drive the trunk detector shielding body 21 to rotate.

[0060] Optionally, the vertical column 31 is vertically fixed in the middle of the movable platform 4 and is aligned with the axis of the seat structure 1; the horizontal platform 39 is fixedly installed on the vertical column and can support the traction screw 32, the ring guide rail gear 33 and the torso detector shield 21. The traction screw 32 cooperates with the ring guide rail gear 33 to install the torso detector shield 21 inside the ring guide rail gear 33 and fasten the torso detector shield 21 on the ring guide rail gear 33. By rotating the traction screw 32 through the traction screw knob 321, the torso detector shield 21 on the ring guide rail gear 33 can change the inclination angle, so that the measurement of different regions of the human torso can be realized.

[0061] Optionally, the ring guide rail gear 33 comprises a support body and a rotating column, the rotating column is installed on the support body, and the support body is provided with a ring guide rail gear knob 331 for adjusting the rotation of the gear. Specifically, the ring guide rail gear knob 331 is provided with a gear matched with the ring guide rail gear 33. By rotating the ring guide rail gear knob 331, the rotating column on the support body can rotate along the central axis of the ring guide rail gear 33, so that the rotation of the torso detector shield 21 is realized.

[0062] In a preferred embodiment, the positioning structure 3 further comprises: a horizontal column 34 installed on the vertical column 31, perpendicular to the vertical column 31 and parallel to the ground, and the thyroid detector shield 22 is embedded in the horizontal column 34; a rack slide rail 311 nested in the groove of the vertical column 31 and connected with the horizontal column 34; a rack slide adjustment knob 312 installed on the rack slide rail 311, rotating the rack slide adjustment knob 312 can drive the horizontal column 34 to move along the axial direction of the vertical column 31; a slide rail 35 provided on the surface of the horizontal column 34 and penetrating through the horizontal column 34, so that the thyroid detector shield 22 is in communication with the external environment, and the slide rail 35 is parallel to the ground; and a slide adjustment knob 36 penetrating through the slide rail 35 and fixedly connected with the thyroid detector shield 22, moving the slide adjustment knob 36 can drive the thyroid detector shield 22 to move along the axial direction of the horizontal column 34.

[0063] Optionally, the horizontal column 34 is movably mounted on the vertical column 32, and the horizontal column 34 is movable up and down along the vertical column 31. A groove is arranged on the vertical column 31 for embedding a rack rail 311, and the rack rail 311 is fixedly connected with the horizontal column 34. The rack rail 311 is adjusted to move, so that the horizontal column 34 moves along with the rack rail 311. Specifically, a rack sliding adjustment knob 312 is arranged to engage with the rack rail 311. The rack sliding adjustment knob 312 is rotated to move the rack rail 311, and then the horizontal column 34 moves up and down. The thyroid detector shielding body 22 carried by the horizontal column 34 is effectively moved up and down to adapt to people of different heights.

[0064] Optionally, the horizontal column 34 is perpendicular to the vertical column 31, and a groove is arranged on the horizontal column 34, so that the thyroid detector shielding body 22 can be embedded in the horizontal column 34. A sliding rail 35 is mounted on the horizontal column 34, and the position of the sliding rail 35 is parallel to the position of the thyroid detector shielding body 22. A sliding adjustment knob 36 is vertically arranged through the sliding rail 35 and connected with the thyroid detector shielding body 22. The sliding adjustment knob 36 moves horizontally along the sliding rail 35, so as to drive the thyroid detector shielding body 22 to move forward and backward along the sliding rail 35.

[0065] Optionally, referring to Figure 2 , Figure 2 is a positioning structure schematic diagram of a seat type radioactive internal contamination measuring device in Embodiment 1 of the present application. A moving chain 37 is arranged on one side of the sliding rail 35, and a gear 38 that engages with the moving chain 37 is arranged on the sliding adjustment knob 36. The sliding adjustment knob 36 is rotated to move the gear 38 on the moving chain 37, so as to drive the thyroid detector shielding body 22 to move forward and backward.

[0066] In a preferred embodiment, the movable platform 4 comprises: a stainless steel plate plane 41 for mounting the seat structure 1, the detector, the torso detector shielding body 21, the thyroid detector shielding body 22 and the positioning structure 3; a support framework arranged at the bottom of the stainless steel plate plane 41 for supporting the stainless steel plate plane 41; and universal wheels 42 arranged below the support framework and in contact with the ground for moving the stainless steel plate plane 41.

[0067] Optionally, the stainless steel plate plane 41 is parallel to the ground, used for placing the detector structure, shielding body part (thyroid detector shielding body 22 and torso detector shielding body 21) and positioning structure 3; the support framework is composed of stainless steel square tubes transversely and longitudinally intersecting and welded, installed at the bottom of the stainless steel plane, used for supporting and preventing the stainless steel plane from deforming; universal wheels 42 are installed below the support framework, distributed at the four corners of the stainless steel plane, used for moving and carrying the whole measuring device, and the universal wheels 42 are provided with self-locking devices for fixing, effectively avoiding the sliding of the universal wheels during the measurement.

[0068] Through the above-mentioned seat type radioactive internal contamination measuring device, the technical effects of local measurement and convenient carrying and moving are achieved, and the technical problems of the related art that the measuring system structure is complex, inconvenient to move, cannot be used for on-site emergency measurement, and the direct measurement method is mostly used for whole body measurement, cannot be used for local measurement, and has certain use limitation are solved.

[0069] Embodiment 2

[0070] Based on the above-mentioned embodiments and optional embodiments, the application further provides an embodiment of a seat type radioactive internal contamination measuring system, Figure 3 is a structural schematic diagram of a seat type radioactive internal contamination measuring system in Embodiment 2 of the application, as Figure 3 shown, the measuring system comprises:

[0071] A measuring module is applied to the above-mentioned seat type radioactive internal contamination measuring device, used for obtaining measurement data, wherein the measurement data is a pulse signal; a digital multi-channel analyzer is connected with the measuring module, used for converting the pulse signal into atlas data; a computer device is connected with the digital multi-channel analyzer, used for receiving the atlas data and analyzing the atlas data to obtain a measurement result.

[0072] Optionally, the measurement module is composed of a measurement device, wherein the measurement data acquired by the measurement module is the measurement data finally output by the detector structure of the measurement device, and the measurement data is a pulse signal formed after the radioactive substance information is processed in a series of processes. The trunk detector and the thyroid detector can be composed of a scintillator detector, and the trunk detector and the thyroid detector each include a detector crystal and a photoelectric conversion device, the detector crystal is directly coupled with the photoelectric conversion device, and is used for amplifying the pulse signal. Specifically, the direct coupling means that the output end of a previous circuit part (or element) is directly connected to the input end of a subsequent circuit part (or element) without passing through any capacitor, transformer or other isolation element for transmission of the pulse signal, and the coupling manner can enable the pulse signal to be amplified and transmitted with minimal distortion.

[0073] Optionally, the digital multi-channel analyzer is connected with the detector structure and the computer device, and is used for receiving the pulse signal acquired by the detector structure and transmitting the pulse signal to the computer device in the form of a graph for subsequent measurement.

[0074] In a preferred embodiment, the computer device includes: a spectrum analysis module connected with the digital multi-channel analyzer, used for analyzing the graph data, confirming the nuclide type and the nuclide activity; a multi-body size detection efficiency correction module, which is pre-set with detection efficiency data and a detection efficiency curve of a plurality of body size populations, and is used for fitting calculation based on the body size parameters of the detected person to determine the detection efficiency value, wherein the plurality of body size populations are used to indicate different height and weight populations; a dose estimation module connected with the spectrum analysis module and the multi-body size detection efficiency correction module, used for calculating the internal exposure dose of the detected person according to the nuclide type, the nuclide activity and the detection efficiency value to obtain a measurement result; and a data management module connected with the dose estimation module, used for storing the measurement result in a preset data management format and exporting and displaying the measurement result.

[0075] Optionally, the computer device comprises a host computer, a display and other necessary operating devices, wherein the necessary operating devices at least include a mouse, a keyboard and a power supply. The software module for energy spectrum analysis and dose management is installed in the host computer. The software module for energy spectrum analysis and dose management mainly comprises a spectrum analysis module, a multi-body size detection efficiency correction module, a dose estimation module and a data management module. The spectrum analysis module mainly analyzes the spectrum data collected by the computer device to confirm the information of nuclide species and nuclide activity. The multi-body size detection efficiency correction module internally stores the detection efficiency curves or detection efficiency values of the measurement system for different body sizes of the detected person. It is to be noted that the detection efficiency curves or detection efficiency values are preset in the multi-body size detection efficiency correction module in advance, and can be fitted and calculated according to the body size parameters of the detected person to obtain more accurate detection efficiency values and improve the accuracy of the measurement results. The dose estimation module is mainly used to calculate the internal exposure dose of the detected person according to the nuclide species and nuclide activity measured by the spectrum analysis module, and the detection efficiency values measured by the multi-body size detection efficiency correction module. The data management module is mainly used to store the measurement results in a certain data management format, and provides functions of query, summary, export, printing and the like.

[0076] Specifically, the detection efficiency value refers to the ratio of the number of radioactive particles that can be detected by the detector to the total number of radioactive particles actually incident on the detector. In the measurement of internal radioactive contamination, the detection efficiency of the detector is affected by various factors, such as the body size parameters of the detected person. Therefore, the multi-body size detection efficiency correction module presets detection efficiency data and detection efficiency curves for a plurality of body size populations. These data and curves are obtained based on a large number of experimental measurements and data analysis, and can reflect the influence of different body size parameters on the detection efficiency of the detector. When measuring the internal radioactive contamination of the detected person, the module will perform fitting calculation according to the body size parameters (such as height, weight, etc.) of the detected person to determine a more accurate detection efficiency value.

[0077] According to the above technical solution, a seat type internal radioactive contamination measurement system is provided. The system is light in weight, movable, and can measure the thyroid, lungs, abdomen and whole body of a human body, and can be used for both conventional measurement and on-site measurement in a nuclear emergency scene. The present application can provide a low-cost, multi-functional and multi-application scene measurement system for the field of internal exposure monitoring.

[0078] The above is only a preferred embodiment of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A seat-type radioactive internal contamination measuring device characterized by comprising: The utility model relates to a kind of radiation environment detection device, including: Seat structure (1) for being detected personnel sit; Detector structure for detecting the kind of radioactive material in the body of the detected personnel and the content of radioactive material; Torso detector shield (21) is disposed towards the direction of the detected personnel sit, and is set as elliptical table shape;The torso detector shield (21) includes first end and the second end with the diameter greater than the first end, the first end is towards the direction of the detector structure, the second end is towards the direction of the detected personnel, and the torso detector shield (21) is used to shield radioactive material in radiation environment; Thyroid gland detector shield (22) is disposed towards the direction of the detected personnel sit, and higher than the torso detector shield (21), and is set as cylindrical shape, the central axis of the cylindrical shape is parallel with ground, one end of the cylindrical shape is fixedly connected with the detector structure, and the thyroid gland detector shield (22) is used to shield radioactive material in the radiation environment; Positioning structure (3) is connected with the torso detector shield (21) and the thyroid gland detector shield (22), for adjusting the height and angle of the torso detector shield (21) and the thyroid gland detector shield (22); The positioning structure (3) includes: vertical column (31) is installed on movable platform (4), and is perpendicular to the ground;Horizontal platform (39) is installed on the vertical column (31), and is parallel to the ground;Traction screw (32) is arranged on the horizontal platform (39);Annular guide rail gear (33) is connected with the traction screw (32), and the torso detector shield (21) is nested in the annular guide rail gear (33);Screw knob (321) is arranged on the traction screw (32), and rotating screw knob (321) can adjust the inclination angle of the annular guide rail gear (33);Annular guide rail gear knob (331) is arranged outside the annular guide rail gear (33), and rotating annular guide rail gear knob (331) can control the annular guide rail gear (33) rotates along the central axis; Movable platform (4), the seat structure (1), the detector structure, the torso detector shield (21), the thyroid gland detector shield (22) and the positioning structure (3) are all installed on the movable platform (4), and the movable platform (4) is used to move the seat structure (1), the detector structure, the torso detector shield (21), the thyroid gland detector shield (22) and the positioning structure (3).

2. The chair-type radioactive internal contamination measuring apparatus according to claim 1, characterized by The seat structure (1) includes: Seat (11) is parallel to the ground, for being detected personnel sit; Chair back (12) is perpendicular to the seat (11), for shielding radioactive material behind the detected personnel; Support frame (13) is connected between the seat (11) and the movable platform (4), for supporting the seat (11), and adjusting the height of the seat (11).

3. The seat-type internal radioactive contamination measuring device according to claim 2, wherein the seat (11) and the backrest (12) are made of lead plates, and the lead plates are wrapped with stainless steel shells, and the surfaces of the stainless steel shells on the side of the seat (11) facing the detector structure and the surfaces of the stainless steel shells on the side of the backrest (12) facing the detector structure are covered with copper plates. The detector structure comprises:

4. The chair-type radioactive internal contamination measuring apparatus according to claim 1, characterized by a trunk detector selected from a high-purity germanium detector or a sodium iodide detector; a thyroid detector selected from a cadmium zinc telluride detector or a sodium iodide detector.

5. The seat-type internal radioactive contamination measuring device according to claim 1, wherein the trunk detector shield (21) is made of lead plates, and the lead plates are wrapped with stainless steel shells; the thyroid detector shield (22) is made of lead plates, and the lead plates are wrapped with stainless steel shells. The positioning structure (3) further comprises: a horizontal column (34) installed on the vertical column (31) and perpendicular to the vertical column (31) and parallel to the ground, and the thyroid detector shield (22) is embedded in the horizontal column (34); 6. The chair-type radioactive internal contamination measuring apparatus according to claim 1, characterized by a rack slide rail (311) nested in a groove of the vertical column (31) and connected with the horizontal column (34); a rack slide adjustment knob (312) installed on the rack slide rail (311), and rotating the rack slide adjustment knob (312) can drive the horizontal column (34) to move along the axial direction of the vertical column (31); a slide rail (35) provided on the surface of the horizontal column (34) and penetrating through the horizontal column (34) to connect the thyroid detector shield (22) with the external environment, and the slide rail (35) is parallel to the ground; a slide adjustment knob (36) penetrating through the slide rail (35) and fixedly connected with the thyroid detector shield (22), and moving the slide adjustment knob (36) can drive the thyroid detector shield (22) to move along the axial direction of the horizontal column (34). The movable platform (4) comprises: a stainless steel plate plane (41) for installing the seat structure (1), the detector structure, the trunk detector shield (21), the thyroid detector shield (22), and the positioning structure (3); 7. The chair-type radioactive internal contamination measuring apparatus according to claim 1, characterized by a support framework provided at the bottom of the stainless steel plate plane (41) for supporting the stainless steel plate plane (41); a plurality of universal wheels (42) installed below the support framework and in contact with the ground for moving the stainless steel plate plane (41). It comprises: a measuring module applied to the seat-type internal radioactive contamination measuring device according to any one of claims 1-7 for obtaining measurement data, wherein the measurement data is a pulse signal; 8. A seated-type internal radioactive contamination measuring system characterized by comprising: a digital multi-channel analyzer connected with the measuring module for converting the pulse signal into atlas data. ​ ​ A computer device connected to the digital multi-channel analyzer is configured to receive the spectrum data and analyze the spectrum data to obtain a measurement result.

9. The seated-type internal radioactive contamination measuring system according to claim 8, characterized by The computer device comprises: a spectrum analysis module connected to the digital multi-channel analyzer and configured to analyze the spectrum data to determine a nuclide type and a nuclide activity; a multi-body-size detection efficiency correction module configured to preset detection efficiency data and a detection efficiency curve for a plurality of body sizes, perform fitting calculation based on a body size parameter of a detected person, and determine a detection efficiency value, wherein the plurality of body sizes are used to indicate different height and weight groups; a dose estimation module connected to the spectrum analysis module and the multi-body-size detection efficiency correction module, and configured to calculate an internal exposure dose of the detected person based on the nuclide type, the nuclide activity, and the detection efficiency value, and obtain a measurement result; a data management module connected to the dose estimation module, and configured to store the measurement result in a preset data management format and export and display the measurement result.

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