Multifunctional food water radioactivity detection equipment

Abstract

The embodiment of the invention provides a multifunctional food water radioactivity detection device, the multifunctional food water radioactivity detection device has a radioactivity activity detection mode, and the multifunctional food water radioactivity detection device comprises a shielding main body; the Marinin cup is arranged in the shielding main body and is used for storing a to-be-tested sample; in the radioactive activity detection mode, the detection device has a spectrum stabilization stage and a measurement stage, and when the detection device is in the spectrum stabilization stage, the detection device is located outside the shielding main body; when the detection device is in the measurement stage, at least part of the detection device is located in the Marinin cup. According to the technical scheme, the detection device is located outside the shielding body in the spectrum stabilization stage, at least part of the detection device is located in the Marinin cup in the measurement stage, and in the radioactive activity detection mode, spectrum stabilization can be conducted through natural radionuclides, so that adverse effects of the shielding body on spectrum stabilization are avoided, and the detection accuracy is improved. And the accuracy of an activity detection result is ensured.

Description

Technical Field

[0001] The present application relates to the field of nuclear radiation monitoring technology, and in particular to a multifunctional food and water radioactivity detection device. Background Art

[0002] In the related technology, food / water radioactivity detectors are mainly used to measure the total γ radioactivity activity, and can perform on-site rapid detection of the radioactivity specific activity in various liquid samples such as drinking water and milk, as well as solid samples such as vegetables, meat, and grains. Since the safety limit of food / water is very low, in order to reduce the detection limit of the food / water radioactivity detector, it is usually necessary to use shielding materials to shield the natural background. However, the shielding material will also attenuate the natural radionuclides, which makes automatic spectrum stabilization more difficult. Summary of the invention

[0003] The embodiment of the present application provides a multifunctional food and water radioactivity detection device to solve or alleviate one or more technical problems in the prior art.

[0004] As one aspect of an embodiment of the present application, an embodiment of the present application provides a multifunctional food and water radioactivity detection device, the multifunctional food and water radioactivity detection device has a radioactivity activity detection mode, the multifunctional food and water radioactivity detection device comprises: a shielding body; a Marin cup, arranged in the shielding body, the Marin cup is used to store the sample to be tested; a detection device, in the radioactivity activity detection mode, the detection device has a spectrum stabilization stage and a measurement stage, when the detection device is in the spectrum stabilization stage, the detection device is located outside the shielding body; when the detection device is in the measurement stage, at least part of the detection device is located in the Marin cup.

[0005] In one embodiment, the detection device includes: a shell; a detection unit, which is arranged in the shell. When the detection device is in the measuring stage, the detection unit is located in the Marin cup and is used to detect the radiation signal in the sample to be tested and convert the radiation signal into an analog electrical signal; a data processing unit, which is arranged in the shell, and the input end of the data processing unit is connected to the output end of the detection unit. When the detection device is in the measuring stage, the data processing unit is located outside the Marin cup.

[0006] In one embodiment, the shell includes: a detection accommodating portion, in which the detection unit is arranged, and when the detection device is in the measuring stage, the detection accommodating portion is located in the Marin Cup; a hand-held portion, in which when the detection device is in the measuring stage, the hand-held portion is arranged outside the shielding body; a control portion, connected between the detection accommodating portion and the hand-held portion, the data processing unit is located in the control portion, and when the detection device is in the measuring stage, the control portion is located outside the Marin Cup.

[0007] In one embodiment, the distance between the detection unit and the inner surface of the detection accommodating portion is smaller than the distance between the remaining structures in the housing and the inner surface of the detection accommodating portion.

[0008] In one embodiment, the detection device also includes a display screen, a button portion, a power supply unit and a charging communication interface connected to the power supply unit, the display screen is arranged on the control portion, at least part of the power supply unit and the button portion are arranged on the handheld portion, and the charging communication interface is arranged on the handheld portion.

[0009] In one embodiment, the data processing unit includes: a preamplifier, the input end of the preamplifier is connected to the output end of the detection unit, and the preamplifier is used to amplify the analog electrical signal; an analog-to-digital converter, the input end of the analog-to-digital converter is connected to the output end of the preamplifier, and the analog-to-digital converter is used to convert the analog electrical signal into a digital electrical signal; a digital processor, the input end of the digital processor is connected to the output end of the analog-to-digital converter, and the digital processor is used to process the digital electrical signal and output energy spectrum data; a controller, the input end of the controller is connected to the output end of the digital processor, and the controller is used to perform energy spectrum measurement and analysis based on the energy spectrum data.

[0010] In one embodiment, the detection unit includes a scintillator crystal and a silicon photomultiplier tube. The scintillator crystal is used to detect the radiation signal in the sample to be tested and emit light. The silicon photomultiplier tube is connected to the scintillator crystal and is used to convert the scintillation photons into analog electrical signals.

[0011] In one embodiment, the multifunctional food and water radioactivity detection device also has a dose rate detection mode and a nuclide identification mode. In the dose rate detection mode and the nuclide identification mode, the detection device is located outside the shielding body.

[0012] In one embodiment, the shielding body includes a shielding layer and a protective layer, the shielding layer defines a receiving cavity with an open top, the Marlin cup is located in the receiving cavity, and the protective layer is arranged on the outer wall of the shielding layer, and the thickness of the protective layer is less than the thickness of the shielding layer.

[0013] In one embodiment, the weight of the detection device is less than or equal to 1 kg; and / or the total weight of the shielding body and the Marlin cup is less than or equal to 7 kg.

[0014] In the embodiment of the present application, the detection device is located outside the shielding body during the spectrum stabilization stage, and the detection device is at least partially located in the Marin cup during the measurement stage. In the radioactivity detection mode, natural radionuclides can be used to stabilize the spectrum, thereby avoiding the shielding body from having an adverse effect on the spectrum stabilization and ensuring the accuracy of the activity detection result.

[0015] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0017] Figure 1 A schematic diagram showing the explosion structure of a multifunctional food and water radioactivity detection device according to an embodiment of the present application is shown;

[0018] Figure 2 Show Figure 1 The overall structural diagram of the multifunctional food and water radioactivity detection equipment shown in;

[0019] Figure 3 A schematic diagram showing the structure of a detection device according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram showing an architecture of a detection device according to an embodiment of the present application is shown;

[0021] Figure 5 A cross-sectional view of a detection unit according to an embodiment of the present application is shown;

[0022] Figure 6 Another cross-sectional view of a detection unit according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic diagram of an exploded structure of a shielding body according to an embodiment of the present application is shown;

[0024] Figure 8 A cross-sectional view of a shielding body according to an embodiment of the present application is shown.

[0025] Description of reference numerals:

[0026] 10: Multifunctional food and water radioactivity detection equipment;

[0027] 100: shielding body; 110: shielding layer; 120: protective layer; 130: accommodating cavity; 140: handle;

[0028] 200: Marin Cup; 210: Storage cavity;

[0029] 300: detection device; 310: housing; 311: detection accommodating part; 312: control part; 3121: first surface; 3122: second surface; 3123: third surface; 3124: fourth surface; 3125: fifth surface; 313: handheld part; 320: detection unit; 321: scintillator crystal; 322: silicon photomultiplier tube; 330: data processing unit; 331: preamplifier; 332: analog-to-digital converter; 333: digital processor; 334: controller; 335: power management module; 340: display screen; 350: button part; 351: up direction key; 352: down direction key; 353: left direction key; 354: right direction key; 355: power / confirmation key; 360: power supply unit; 370: charging communication interface; 380: alarm device;

[0030] 400: shielding cover; 410: through hole;

[0031] 500: Sample preparation mixer. DETAILED DESCRIPTION

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0033] Combine the following Figure 1-Figure 8 A multifunctional food and water radioactivity detection device according to an embodiment of the present application is described.

[0034] Figure 1 FIG. 1 is a schematic diagram showing the explosion structure of the multifunctional food and water radioactivity detection device 10 according to an embodiment of the present application. Figure 1 As shown, the multifunctional food and water radioactivity detection equipment 10 includes a shielding body 100 , a Marlin cup 200 and a detection device 300 .

[0035] The Marin cup 200 is disposed in the shielding body 100, and the Marin cup 200 is used to store the sample to be tested. Exemplarily, the shielding body 100 may include a shielding material (e.g., lead) having an effective radioactive shielding performance, thereby blocking the interference of external radiation on the test results, ensuring the stability of the measurement environment, and reducing background radiation and environmental noise, thereby improving the sensitivity, accuracy and efficiency of the measurement, and ensuring that the detected signal comes from the sample to be tested. The Marin cup 200 can prevent the sample to be tested from being contaminated by the outside world during the detection process, and ensure the accuracy of the test results.

[0036] The multifunctional food and water radioactivity detection device 10 has a radioactivity detection mode. In the radioactivity detection mode, the detection device 300 has a spectrum stabilization stage and a measurement stage. When the detection device 300 is in the spectrum stabilization stage, the detection device 300 is located outside the shielding body 100; when the detection device 300 is in the measurement stage, at least part of the detection device 300 is located inside the Marlin cup 200.

[0037] Exemplarily, when the detection device 300 is in the radioactivity detection mode, the state of the sample to be tested can be solid, liquid or a solid-liquid mixture. The type of the sample to be tested can be food (such as drinking water, milk, juice, vegetables, meat, grains, etc.) or non-food (such as chemical solutions, soil, etc.).

[0038] In the radioactivity detection mode, it is necessary to perform energy spectrum measurement to identify different types of radionuclides and then determine the activity of the corresponding radionuclides. When performing energy spectrum measurement, the energy spectrum needs to be stabilized (i.e., the spectrum stabilization stage) to ensure the accuracy of the measurement results. When the detection device is in the spectrum stabilization stage, the detection device 300 is located outside the shielding body 100. At this time, the detection device 300 is separated from the Marin cup 200, and the detection device 300 is separated from the shielding body 100. The detection device 300 can successfully complete automatic spectrum stabilization in the environment to avoid the shielding body 100 shielding the benchmark characteristic peak in the external environment, and can use natural radionuclides for spectrum stabilization, thereby avoiding the shielding body 100 from having an adverse effect on the spectrum stabilization and ensuring the accuracy of the detection results. After the spectrum stabilization is completed, the detection end of the detection device 300 can be extended into the Marin cup 200 for measurement (i.e., the measurement stage, such as Figure 2 As shown), the detection result of the radioactive specific activity in the sample to be tested is obtained. Thus, the radioactive contamination level of the sample to be tested can be determined, thereby determining whether the sample to be tested meets the safety requirements.

[0039] For example, Figure 1 As shown, the multifunctional food and water radioactivity detection equipment 10 may also include a sample preparation mixer 500 to mix the sample to be tested, ensure the uniformity of the sample to be tested, reduce the precipitation or stratification phenomenon that may exist in the sample to be tested, and reduce the detection error caused by the unevenness of the sample to be tested, thereby improving the accuracy and reliability of the detection results.

[0040] According to the multifunctional food and water radioactivity detection equipment 10 of the embodiment of the present application, by making the detection device 300 located outside the shielding body 100 during the spectrum stabilization stage, and the detection device 300 at least partially located in the Marin cup 200 during the measurement stage, in the radioactivity activity detection mode, natural radioactive nuclides can be used for spectrum stabilization, thereby avoiding the adverse effect of the shielding body 100 on the spectrum stabilization and ensuring the accuracy of the activity detection results.

[0041] In one embodiment, the multifunctional food and water radioactivity detection device 10 may also have a dose rate detection mode and a nuclide identification mode, in which the detection device 300 is located outside the shielding body 100. The dose rate refers to the radiation dose received per unit time, usually in millisieverts per hour (mSv / h) or microsieverts per hour (μSv / h).

[0042] For example, when the detection device 300 is in the dose rate detection mode, the operator can hold the detection device 300 to measure the environmental dose rate in real time at the nuclear contamination site. When the dose rate exceeds the preset radiation threshold, the detection device 300 can trigger an audible and visual alarm, thereby effectively preventing people from mistakenly entering the radiation area. When the detection device 300 is in the nuclide identification mode, the detection device 300 can identify radioactive nuclides in the environment.

[0043] In this embodiment, by making the multifunctional food and water radioactivity detection device 10 also have a dose rate detection mode and a nuclide identification mode, the multifunctional food and water radioactivity detection device 10 has more comprehensive functions and more diverse usage scenarios, and can adapt to a variety of detection needs. In addition, the detection device 300 can be used independently in the dose rate detection mode and the nuclide identification mode, which is more convenient and flexible.

[0044] Figure 3 FIG. 3 is a schematic diagram showing the structure of a detection device 300 according to an embodiment of the present application. Figure 1 and Figure 3 As shown, the detection device 300 may include a housing 310, a detection unit 320 and a data processing unit 330. The detection unit 320 is disposed in the housing 310. When the detection device 300 is in the measurement phase, the detection unit 320 is located in the Marin Cup 200, and the detection unit 320 is used to detect the radiation signal in the sample to be tested and convert the radiation signal into an analog electrical signal. The data processing unit 330 is disposed in the housing 310, and the input end of the data processing unit 330 is connected to the output end of the detection unit 320. When the detection device 300 is in the measurement phase, the data processing unit 330 is located outside the Marin Cup 200.

[0045] Exemplarily, the detection end of the detection device 300 includes a detection unit 320. When the detection device 300 is in a radioactivity detection mode, the sample to be tested can be placed in the Marin cup 200. After the spectrum stabilization is completed, the detection unit 320 is extended into the Marin cup 200 to enter the measurement phase. The detection unit 320 can detect the radiation signal in the sample to be tested and convert the radiation signal into an analog electrical signal. The data processing unit 330 can receive the analog electrical signal and determine the detection result of the radioactivity specific activity in the sample to be tested based on the analog electrical signal.

[0046] When the detection device 300 is in the dose rate detection mode, the detection device 300 is located outside the shielding body 100, and the detection unit 320 can detect the radiation signal in the environment and convert the radiation signal into an analog electrical signal. The data processing unit 330 can receive the analog electrical signal and calculate the dose rate based on the analog electrical signal. When the dose rate exceeds the preset radiation threshold, an audible and visual alarm can be triggered, thereby effectively preventing people from mistakenly entering the radiation area.

[0047] When the detection device 300 is in the nuclide identification mode, the detection device 300 is located outside the shielding body 100, and the detection unit 320 can also detect the radiation signal and convert the radiation signal into an analog electrical signal. The data processing unit 330 can receive the analog electrical signal and identify the radioactive nuclides in the environment based on the analog electrical signal.

[0048] In this embodiment, by providing a shell 310, a detection unit 320 and a data processing unit 330, the shell 310 can effectively protect the detection unit 320 and the data processing unit 330, and the data processing unit 330 can determine the detection result (such as the detection result of the radioactive specific activity in the sample to be tested, the dose rate calculation result and the identification result of the radioactive nuclide) according to the analog electrical signal output by the detection unit 320. Moreover, since the detection unit 320 is located in the Marin cup 200 when the detection device 300 is in the measurement stage, and since the Marin cup 200 is located in the shielding body 100, the shielding body 100 can form an electromagnetic shield to block the interference of external radiation on the detection result, so that the detection result is more accurate. In addition, by locating the data processing unit 330 outside the Marin cup 200, the space occupied by the detection device 300 in the Marin cup 200 can be reduced.

[0049] In one embodiment, Figure 3 As shown, the housing 310 may include a detection accommodating portion 311, a control portion 312 and a handheld portion 313. Specifically, the detection unit 320 is disposed in the detection accommodating portion 311. When the detection device 300 is in the measurement stage, the detection accommodating portion 311 is located in the Marin Cup 200, and the handheld portion 313 is disposed outside the shielding body 100. The control portion 312 is connected between the detection accommodating portion 311 and the handheld portion 313, and the data processing unit 330 is located in the control portion 312. When the detection device 300 is in the measurement stage, the control portion 312 is located outside the Marin Cup 200.

[0050] It should be noted that, in this application, “the detection unit 320 is disposed in the detection accommodating portion 311” should be understood in a broad sense, which means that the detection unit 320 is entirely located in the detection accommodating portion 311. In other words, the detection unit 320 may be entirely located in the detection accommodating portion 311, or most of the structure of the detection unit 320 may be located in the detection accommodating portion 311, and a small part of the structure of the detection unit 320 may be located in the control portion 312.

[0051] For example, in combination Figure 1 and Figure 3 , the housing 310 can be formed into a "gun shape". The control part 312 can be generally in a quadrangular prism structure, and the outer surface of the control part 312 can include a first surface 3121 and a second surface 3122 arranged oppositely, a third surface 3123 and a fourth surface 3124 arranged oppositely, and a fifth surface 3125 and a sixth surface (not shown in the figure) arranged oppositely, the fifth surface 3125 is connected between the first surface 3121 and the second surface 3122, and the fifth surface 3125 is connected between the third surface 3123 and the fourth surface 3124. Among them, the first surface 3121, the second surface 3122, the third surface 3123 and the fourth surface 3124 can all be rectangular. The fifth surface 3125 and the sixth surface can be trapezoidal. The detection accommodating part 311 is connected to the first surface 3121 of the control part 312, and the detection accommodating part 311 can be formed into a cylindrical structure adapted to the structure of the detection unit 320. Accordingly, the Marlin cup 200 may define a cylindrical storage cavity 210 adapted to the detection accommodating portion 311. The hand-held portion 313 may be connected to the third surface 3123 and the second surface 3122 of the control portion 312, and the central axis of the hand-held portion 313 may form an angle with the central axis of the detection accommodating portion 311.

[0052] In this embodiment, by making the housing 310 include a detection accommodating portion 311, a control portion 312 and a handheld portion 313, the detection accommodating portion 311 can effectively protect the detection unit 320, prevent dust, moisture, etc. from damaging the detection unit 320, and extend the service life of the detection unit 320. The handheld portion 313 makes it more convenient to carry and operate the detection device 300, so that the operator can flexibly adjust the position of the detection device 300 according to needs. In addition, the arrangement of the control portion 312 and the handheld portion 313 can avoid occupying the internal space of the Marlin Cup 200, and the structure is more reasonable.

[0053] In one embodiment, referring to Figure 1 and Figure 3, the distance between the detection unit 320 and the inner surface of the detection accommodating part 311 is less than the distance between the remaining structures in the shell 310 and the inner surface of the detection accommodating part 311. Exemplarily, the detection unit 320 can be a cylindrical structure, and the shape of the detection accommodating part 311 can be adapted to the shape of the detection unit 320. The inner surface of the detection accommodating part 311 can include a bottom surface and a side surface connected to each other. When the detection device 300 is in the measurement stage, the bottom surface of the detection accommodating part 311 is parallel to the bottom wall of the storage cavity 210 of the Marlin Cup 200, and the bottom surface of the detection accommodating part 311 is arranged opposite to the bottom wall of the storage cavity 210. The sample to be tested is located between the bottom surface of the detection accommodating part 311 and the bottom wall of the storage cavity 210.

[0054] In this embodiment, by making the distance between the detection unit 320 and the inner surface of the detection accommodating portion 311 smaller than the distance between the remaining structures in the shell 310 and the inner surface of the detection accommodating portion 311, the distance between the detection unit 320 and the inner surface of the detection accommodating portion 311 is shortened. Therefore, no other structure is arranged between the detection unit 320 and the inner surface of the detection accommodating portion 311. The radiation rays can directly enter the detection unit 320 after passing through the detection accommodating portion 311, which can effectively reduce the shielding of the radiation rays, thereby further improving the accuracy of the detection results.

[0055] In one embodiment, Figure 3 As shown, the detection device 300 may also include a display screen 340, a button portion 350, a power supply unit 360 and a charging communication interface 370 connected to the power supply unit 360, the display screen 340 is arranged on the control unit 312, at least part of the power supply unit 360 and the button portion 350 are arranged on the handheld portion 313, and the charging communication interface 370 is arranged on the handheld portion 313.

[0056] For example, in combination Figure 3 , a part of the power supply unit 360 is disposed in the handheld part 313, and another part of the power supply unit 360 is disposed in the control part 312. Optionally, the power supply unit 360 can be a lithium battery, but is not limited thereto. The charging communication interface 370 is disposed at one end of the handheld part 313 away from the control part 312 (for example, Figure 3 The charging communication interface 370 may have a power supply function and a communication function. For example, the charging communication interface 370 and the power supply may be connected through a charging device, so that the power supply unit 360 is charged through the charging communication interface 370; the charging communication interface 370 and the host computer may also be connected through a data connection line, so as to realize the communication function.

[0057] Exemplarily, the detection accommodating portion 311 is connected to the first surface 3121 of the control portion 312, and the display screen 340 can be arranged on the second surface 3122 of the control portion 312. The button portion 350 is arranged on the side of the handheld portion 313 that is away from the detection accommodating portion 311. An angle α may be formed between the surface of the side of the handheld portion 313 that is away from the detection accommodating portion 311 and the display screen 340. Among them, α may be 15° to 25° (including the endpoint values), for example, α may be 20°. In this way, while ensuring that the operator can hold and use the detection device 300 in all directions, a good observation field of view can be provided for the operator.

[0058] Optionally, combined Figure 2 and Figure 3 The button part 350 may include an up direction key 351, a down direction key 352, a left direction key 353, a right direction key 354, and a power / confirmation key 355. The up direction key 351, the down direction key 352, the left direction key 353, and the right direction key 354 may be arranged head to tail in sequence to define a circular ring structure, and the power / confirmation key 355 is located in the circular ring structure. The button part 350 configured in this way can be operated by an operator with one hand while satisfying the operating function, and is more convenient and flexible to use.

[0059] Figure 4 FIG. 1 shows an architecture diagram of a detection device according to an embodiment of the present application. In one embodiment, Figure 4 As shown, the data processing unit 330 includes a preamplifier 331, an analog-to-digital converter 332, a digital processor 333 and a controller 334. Among them, the input end of the preamplifier 331 is connected to the output end of the detection unit 320, and the preamplifier 331 is used to amplify the analog electrical signal. The input end of the analog-to-digital converter 332 is connected to the output end of the preamplifier 331, and the analog-to-digital converter 332 is used to convert the analog electrical signal into a digital electrical signal. The input end of the digital processor 333 is connected to the output end of the analog-to-digital converter 332, and the digital processor 333 is used to process the digital electrical signal and output energy spectrum data. The input end of the controller 334 is connected to the output end of the digital processor 333, and the controller 334 is used to perform energy spectrum measurement and analysis based on the energy spectrum data.

[0060] Exemplarily, the digital processor 333 can be a programmable logic device (Field-Programmable Gate Array, FPGA), which can include a logic module, a trigger, a programmable interconnect network, a digital signal processing module and a storage module (not shown). Among them, the logic module can be used to classify and process the received digital electrical signals, and perform various logic operations, such as determining the amplitude and time characteristics of the digital electrical signals. The trigger can store the processed pulse amplitude information to ensure that the energy spectrum data is transmitted to the controller 334 at an appropriate clock cycle. The programmable interconnect network allows the user to flexibly adjust the processing path of the digital electrical signal so that the data can be processed according to a specific timing and sequence to meet different experimental requirements. The digital signal processing module can be used for high-precision signal analysis, such as filtering, integration, differentiation and other advanced processing of digital electrical signals, to help more accurately extract key information such as pulse amplitude. The storage module can be used to store pulse data, such as intermediate processing results, pulse counts, etc., and can also be used to cache the collected data, waiting for subsequent processing or transmission.

[0061] Exemplarily, the controller 334 can determine the detection result after performing energy spectrum measurement and analysis according to the energy spectrum data. For example, when the detection device 300 is in the radioactivity detection mode, the controller 334 can determine the detection result of the radioactivity specific activity in the sample to be tested. When the detection device 300 is in the dose rate detection mode, the controller 334 can determine the dose rate calculation result. When the detection device 300 is in the nuclide identification mode, the controller 334 can determine the identification result of the radionuclide. Optionally, the controller 334 can be an embedded microprocessor, but is not limited thereto.

[0062] For example, Figure 4 As shown, the controller 334 can be electrically connected to the display screen 340. After the controller 334 performs energy spectrum measurement according to the energy spectrum data and obtains the detection result, the detection result can be displayed on the display screen 340. The detection device 300 can also include an alarm device 380 connected to the controller 334. For example, when the detection device 300 is in a dose rate detection mode, when the dose rate exceeds a preset radiation threshold, the controller 334 can control the alarm device 380 to alarm, thereby preventing people from mistakenly entering the radiation area. Optionally, the alarm device 380 can include an indicator light, a buzzer, etc., but is not limited thereto.

[0063] Optionally, refer to Figure 4, the data processing unit 330 may further include a power management module 335. The power management module 335 may be connected to the preamplifier 331, the analog-to-digital converter 332, the digital processor 333 and the controller 334 to provide a stable power supply to ensure that the preamplifier 331, the analog-to-digital converter 332, the digital processor 333 and the controller 334 operate with high precision. The power management module 335 may also manage power consumption in different detection modes, optimize energy efficiency, and ensure that the accuracy and reliability of data are not affected by power fluctuations during the detection process.

[0064] Figure 5 A cross-sectional view of a detection unit 320 according to an embodiment of the present application is shown; Figure 6 Another cross-sectional view of the detection unit 320 according to an embodiment of the present application is shown. Figure 5 and Figure 6 As shown, the detection unit 320 includes a scintillator crystal 321 and a silicon photomultiplier tube 322. The scintillator crystal 321 is used to detect the radiation signal in the sample to be tested and emit light. The silicon photomultiplier tube 322 is connected to the scintillator crystal 321 and is used to convert the scintillation photons into analog electrical signals.

[0065] Therefore, by setting up a scintillator crystal 321 and a silicon photomultiplier tube 322 connected to the scintillator crystal 321, the silicon photomultiplier tube 322 has the advantages of small size, resistance to impact and vibration, and insensitivity to magnetic fields, so that the detection unit 320 can be smaller in size, higher in accuracy and better in stability.

[0066] Figure 7 A schematic diagram of an exploded structure of a shielding body 100 according to an embodiment of the present application is shown; Figure 8 FIG. 1 is a cross-sectional view of a shielding body 100 according to an embodiment of the present application. Figure 7 and Figure 8 As shown, the shielding body 100 may include a shielding layer 110 and a protective layer 120 , the shielding layer 110 defines a accommodating cavity 130 with an open top, the Marlin cup 200 is located in the accommodating cavity 130 , the protective layer 120 is arranged on the outer wall of the shielding layer 110 , and the thickness of the protective layer 120 is less than the thickness of the shielding layer 110 .

[0067] Exemplarily, the shielding body 100 may be formed into a cylindrical structure. The material of the shielding layer 110 may include lead; the thickness of the shielding layer 110 may be 8 mm to 12 mm (including the end value), for example, 10 mm, but not limited thereto. The material of the protective layer 120 may include a metal such as an aluminum alloy, and the thickness of the protective layer 120 may be 3 mm to 5 mm (including the end value), for example, 4 mm, but not limited thereto.

[0068] For example, refer to Figure 7 , Figure 8 Combined with Figure 3 The multifunctional food and water radioactivity detection device may further include a shielding cover 400 provided on the shielding body 100. The shielding cover 400 may include a cover shielding layer and a cover protective layer. The cover protective layer is provided on the outer wall of the cover shielding layer. The thickness of the cover protective layer may be less than the thickness of the cover shielding layer. Among them, the material of the cover shielding layer may be the same as the material of the shielding layer 110, and the thickness of the cover shielding layer may be the same as the thickness of the shielding layer 110. The material of the cover protective layer may be the same as the material of the protective layer 120, and the thickness of the cover protective layer may be the same as the thickness of the protective layer 120. A through hole 410 may be formed on the shielding cover 400, and the storage cavity 210 of the Marlin Cup 200 may be exposed through the through hole 410. When the detection device 300 is in the measurement stage, a part of the control unit 312 may be located in the through hole 410. A handle 140 may be provided on the shielding body 100 for easy carrying.

[0069] In this embodiment, by providing a shielding layer 110 and a protective layer 120 located on the outer wall of the shielding layer 110, the shielding layer 110 has an effective radioactive shielding performance, thereby blocking the interference of external radiation on the detection result, ensuring the stability of the measurement environment, and reducing background radiation and environmental noise, thereby improving the sensitivity, accuracy and efficiency of the measurement, and ensuring that the detected signal comes from the sample to be tested. The protective layer 120 can serve as a carrier of the shielding layer 110 to prevent the shielding layer 110 from being deformed due to collisions, and can prevent operators from being poisoned due to direct contact with the shielding material, thereby improving safety.

[0070] In one embodiment, the weight of the detection device 300 may be less than or equal to 1 kg. For example, when the detection device 300 includes a housing 310, a detection unit 320, a data processing unit 330, a display screen 340, a button unit 350, and a power supply unit 360, the total weight of the housing 310, the detection unit 320, the data processing unit 330, the display screen 340, the button unit 350, and the power supply unit 360 is less than or equal to 1 kg. In this way, the detection device 300 can be held and operated by an operator in one hand, and is convenient to carry.

[0071] In one embodiment, the total weight of the shielding body 100 and the Marin cup 200 may be less than or equal to 7 kg. For example, when the multifunctional food and water radioactivity detection device 10 includes a shielding cover 400, the total weight of the shielding cover 400, the shielding body 100 and the Marin cup 200 may be less than or equal to 7 kg. In this way, the total weight of the shielding body 100 and the Marin cup 200 is small, so that the operator can carry it with one hand, thereby making the movement and transportation of the multifunctional food and water radioactivity detection device 10 more convenient.

[0072] The other components of the multifunctional food and water radioactivity detection device 10 of the above embodiment can be adopted from various technical solutions known to ordinary technicians in this field now and in the future, and will not be described in detail here.

[0073] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0077] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A multifunctional food and water radioactivity detection device, characterized in that: Having a radioactivity detection mode, the multifunctional food and water radioactivity detection equipment comprises: Shielding the main body; A Marlin cup, disposed in the shielding body, and used for storing a sample to be tested; The detection device, in the radioactivity detection mode, has a spectrum stabilization stage and a measurement stage. When the detection device is in the spectrum stabilization stage, the detection device is located outside the shielding body; when the detection device is in the measurement stage, at least part of the detection device is located inside the Marin cup.

2. The multifunctional food and water radioactivity detection device according to claim 1 is characterized in that: The detection device comprises: case; A detection unit is disposed in the housing. When the detection device is in the measuring stage, the detection unit is located in the Marlin cup and is used to detect the radiation signal in the sample to be tested and convert the radiation signal into an analog electrical signal. A data processing unit is arranged in the shell, and an input end of the data processing unit is connected to an output end of the detection unit. When the detection device is in the measuring stage, the data processing unit is located outside the Marin Cup.

3. The multifunctional food and water radioactivity detection device according to claim 2 is characterized in that: The housing comprises: a detection accommodating portion, wherein the detection unit is disposed in the detection accommodating portion, and when the detection device is in the measuring stage, the detection accommodating portion is located in the Marlin Cup; a handheld part, wherein when the detection device is in the measurement phase, the handheld part is arranged outside the shielding body; The control part is connected between the detection accommodating part and the handheld part. The data processing unit is located in the control part. When the detection device is in the measuring stage, the control part is located outside the Marin Cup.

4. The multifunctional food and water radioactivity detection device according to claim 3 is characterized in that: The distance between the detection unit and the inner surface of the detection accommodating portion is smaller than the distance between the remaining structures in the housing and the inner surface of the detection accommodating portion.

5. The multifunctional food and water radioactivity detection equipment according to claim 3 is characterized in that: The detection device also includes a display screen, a button part, a power supply unit and a charging communication interface connected to the power supply unit, the display screen is arranged on the control part, at least part of the power supply unit and the button part are arranged on the handheld part, and the charging communication interface is arranged on the handheld part.

6. The multifunctional food and water radioactivity detection device according to claim 2 is characterized in that: The data processing unit comprises: A preamplifier, the input end of the preamplifier is connected to the output end of the detection unit, and the preamplifier is used to amplify the analog electrical signal; An analog-to-digital converter, wherein the input end of the analog-to-digital converter is connected to the output end of the preamplifier, and the analog-to-digital converter is used to convert the analog electrical signal into a digital electrical signal; A digital processor, wherein the input end of the digital processor is connected to the output end of the analog-to-digital converter, and the digital processor is used to process the digital electrical signal and output energy spectrum data; A controller, wherein the input end of the controller is connected to the output end of the digital processor, and the controller is used to perform energy spectrum measurement and analysis according to the energy spectrum data.

7. The multifunctional food and water radioactivity detection device according to claim 2 is characterized in that: The detection unit includes a scintillator crystal and a silicon photomultiplier tube. The scintillator crystal is used to detect the radiation signal in the sample to be tested and emit light. The silicon photomultiplier tube is connected to the scintillator crystal and is used to convert the scintillation photons into analog electrical signals.

8. The multifunctional food and water radioactivity detection device according to claim 1 is characterized in that: It also has a dose rate detection mode and a nuclide identification mode. In the dose rate detection mode and the nuclide identification mode, the detection device is located outside the shielding body.

9. The multifunctional food and water radioactivity detection device according to any one of claims 1 to 8, characterized in that: The shielding body includes a shielding layer and a protective layer. The shielding layer defines a receiving cavity with an open top. The Marlin cup is located in the receiving cavity. The protective layer is arranged on the outer wall of the shielding layer. The thickness of the protective layer is less than the thickness of the shielding layer.

10. The multifunctional food and water radioactivity detection device according to any one of claims 1 to 8, characterized in that: The weight of the detection device is less than or equal to 1 kg; and / or The total weight of the shielding body and the Marlin cup is less than or equal to 7 kg.

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