Outdoor gamma-ray monitor and use method thereof

Abstract

The invention provides an outdoor gamma-ray monitor and a use method thereof, the outdoor gamma-ray monitor comprises a monitor body, a detector, an inner cylinder, a swing mechanism, a moving mechanism and an outer cylinder, and the detector is arranged on the monitor body; the inner cylinder is arranged on the monitor body, and a plurality of first channels which are arranged at intervals and are not communicated with one another are formed in the cylinder wall of the inner cylinder; the slewing mechanism is arranged on the monitor body and can rotate around the axis of the inner cylinder; the moving mechanism is arranged on the slewing mechanism and is provided with a moving part capable of linearly moving in the axial direction of the inner cylinder; the outer cylinder is arranged on the moving part of the moving mechanism, and a second channel is formed in the outer side of the outer cylinder; according to the monitor, through cooperation of the moving mechanism and the rotating mechanism, flexible switching between a multi-directional monitoring mode and a directional monitoring mode is achieved, the problem of leak detection of a weak radioactive source caused by signal crosstalk of a traditional device in a general survey mode is solved, combination of rapid panoramic scanning and high-sensitivity identification positioning is achieved, and the detection accuracy is improved. And the comprehensive efficiency of outdoor gamma ray monitoring is improved.

Description

Technical Field

[0001] This invention relates to the field of gamma-ray monitoring technology, and in particular to an outdoor gamma-ray monitor and its usage method. Background Technology

[0002] Gamma external exposure monitoring is an important component of environmental radiation monitoring. It mainly assesses the level of environmental radiation and its potential impact on the public by measuring the amount of gamma rays irradiated in the radiation field. This monitoring is usually carried out using portable exposure rate meters or dosimeters in various scenarios such as around nuclear facilities, emergency sites, and general environments, providing key basic data for radiation environmental safety assessment and management.

[0003] A gamma-ray wireless sensing and monitoring device and system, disclosed in CN103295382B, includes a gamma-ray wireless sensing and monitoring device comprising a gamma-ray information acquisition device and a gamma-ray wireless sensing and monitoring interface. The gamma-ray information acquisition device includes a gamma-ray energy spectrum probe and an intelligent calibrator. The gamma-ray wireless sensing and monitoring interface includes a microcontroller, an information storage device, an interface converter, a wireless transceiver, and a power supply. The interface converter is connected between the intelligent calibrator and the microcontroller to prevent the microcontroller from being burned out. The gamma-ray wireless sensing and monitoring system includes a gamma-ray wireless sensing and monitoring device, a gamma-ray wireless sensing network, and a gamma-ray wireless sensing and monitoring center. The wireless sensing unit communicates wirelessly with the gamma-ray wireless sensing and monitoring device through the gamma-ray wireless sensing network to achieve remote monitoring of gamma rays.

[0004] Currently, the detector housings of outdoor gamma-ray monitors are all fixed in position and are static omnidirectional receivers. When facing complex radiation fields or weak radiation sources, there is a problem that the strong radiation source signal can overwhelm the weak radiation source signal, leading to the risk of missed detection. At the same time, it is impossible to suppress noise in a specific direction, and the detection sensitivity and positioning ability of low-activity point sources are poor, which reduces the overall effectiveness of gamma-ray monitoring. Summary of the Invention

[0005] In view of this, the present invention proposes an outdoor gamma-ray monitoring instrument and its usage method, which realizes flexible switching between multi-directional and directional monitoring modes. In multi-directional monitoring, all channels are opened simultaneously to achieve efficient and rapid surveys; in directional monitoring, a single narrow channel effectively isolates radiation interference from non-target directions, significantly improving the signal-to-noise ratio. It not only solves the problem of missed detection of weak radiation sources caused by signal crosstalk in the survey mode of traditional equipment, but also realizes the combination of rapid panoramic scanning and high-sensitivity identification and positioning, thus improving the overall efficiency of outdoor gamma-ray monitoring.

[0006] The technical solution of this invention is implemented as follows: This invention provides an outdoor gamma-ray monitoring instrument, comprising a monitoring instrument body, a detector, an inner cylinder, a rotating mechanism, a moving mechanism, and an outer cylinder, wherein, The detector is mounted on the main body of the monitor and is used to receive gamma rays and convert them into electrical signals; The inner cylinder is installed on the main body of the monitor and sleeved on the outside of the detector. Multiple spaced and non-communicating first channels are opened on the cylinder wall of the inner cylinder. The rotary mechanism is mounted on the main body of the monitor and sleeved on the outside of the inner cylinder, and can rotate around the axis of the inner cylinder; The moving mechanism is mounted on the rotary mechanism, and the moving mechanism has a moving part that can move linearly along the axial direction of the inner cylinder; The outer cylinder is mounted on the moving part of the moving mechanism and sleeved on the outside of the inner cylinder, and is sealed to the outer wall of the inner cylinder. A second channel is provided on the outside of the outer cylinder. The detector is aligned with the axes of the inner and outer cylinders; the moving part of the moving mechanism drives the outer cylinder to move away from the main body of the monitor, so that multiple first channels can contact the external environment for multi-directional monitoring. The rotary mechanism drives the outer cylinder on the moving mechanism to rotate, so that the second channel selectively connects with the first channel in the corresponding monitoring direction for directional monitoring.

[0007] Based on the above technical solutions, preferably, the plurality of first channels are evenly distributed in a ring along the axis of the inner cylinder, and the inner dimensions of the first channel and the second channel are matched, and the port width of the first channel is smaller than the width between two adjacent second channels.

[0008] Based on the above technical solutions, preferably, the rotary mechanism includes a base, a rotating disk, a rotary gear, a first driving component, and a driving gear, wherein, The base is fixed to the monitor body and is encircled on the outside of the detector, and the inner cylinder is threaded to the inside of the base; The rotating disc is mounted on the base and located on the outside of the inner cylinder, and can rotate circumferentially along the axis of the inner cylinder; The rotary gear is fixed to the outside of the rotating disk; The first driving component is fixed on the monitor body and located on one side of the rotary gear. The driving gear is fixed on the output shaft of the first driving component and meshes with the rotary gear.

[0009] Based on the above technical solutions, preferably, the rotary mechanism further includes a guide and multiple rolling elements, wherein, An annular groove is provided on the base, and the guide is fixed on the side of the rotating disk near the base, and the guide extends into and slides in the annular groove; The inner wall of the annular groove and the side of the guide away from the rotating disk are both provided with ball grooves. Multiple rolling elements are movably embedded between two opposite ball grooves to support and slide the rotating disk.

[0010] Based on the above technical solutions, preferably, the moving mechanism includes a bracket, a second driving component, a lead screw, a moving component, and a connecting component. The bracket is fixed on the side of the rotating disk away from the base; The second drive unit is mounted on the bracket, and the lead screw is fixed on the output shaft of the second drive unit; the lead screw is arranged parallel to the axial direction of the inner cylinder; the moving part is threadedly connected to the outside of the lead screw; One end of the connector is fixed to the movable part, and the other side is slidably connected to the bracket, and the connector has a mounting hole; the outer cylinder is threaded into the mounting hole; The second driving component drives the lead screw to move the outer cylinder linearly along the axial direction of the inner cylinder.

[0011] Based on the above technical solutions, preferably, the moving mechanism further includes a fixing component, a sliding component, a top plate, and a cleaning component, wherein, The fastener is fixed to the bracket and located on the side of the outer cylinder away from the lead screw, and is symmetrically arranged with respect to the position of the lead screw; The sliding component is slidably connected to the outside of the fixed component and fixedly connected to the connecting component, and is used to limit the movement of the connecting component; The top plate is positioned between the fixing component and the end of the lead screw away from the support, and the fixing component is fixedly connected to the top plate, while the lead screw is rotatably connected to the top plate; the top plate has a slot, and the slot, the mounting hole, and the axis of the outer cylinder are on the same straight line; The cleaning component is detachably installed inside the slot and fits against the outer surface of the outer cylinder.

[0012] Based on the above technical solutions, preferably, it also includes at least two first sealing elements, a second sealing element, and several elastic elements, wherein, The inner side of the outer cylinder is provided with at least two first grooves along its axial direction, and the at least two first grooves are respectively located on both sides of the second channel in the axial direction. At least two first seals are respectively disposed in corresponding first grooves, and the first seals can slide along the radial direction of the first grooves. The first seals abut against the inner side of the first grooves and the surface of the inner cylinder respectively, so as to make the outer cylinder and the inner cylinder axially sealed. The inner side of the outer cylinder is provided with at least two second grooves along its circumferential direction, and the at least two second grooves are respectively located on both sides of the second channel in the circumferential direction. At least two second seals are respectively disposed in corresponding second grooves, and the second seals can slide along the radial direction of the second grooves. The second seals abut against the inner side of the second grooves and the surface of the inner cylinder respectively, so as to seal the outer cylinder and the inner cylinder in the circumferential direction. Several elastic elements are respectively disposed in each of the first and second recesses, and the side of the first and second seals away from the inner cylinder is fixedly connected to the corresponding elastic element, so that the first and second seals are always in contact with the surface of the inner cylinder.

[0013] Based on the above technical solutions, preferably, both the first sealing element and the second sealing element include an elastic rubber layer and a tungsten rubber layer, wherein the elastic rubber layer covers the outside of the tungsten rubber layer, which is used to provide flexible sealing and radiation shielding between the outer cylinder and the inner cylinder.

[0014] Based on the above technical solutions, the preferred embodiment also includes a solar panel, a power module, and a miniature camera, wherein... A solar panel is installed on one side of the monitoring device to convert solar energy into electrical energy; The power module is located inside the monitor and is used to store and convert electrical energy to power the monitor. The miniature camera is embedded in the outer cylinder to collect video of the external environment, and the lens of the miniature camera is on the same plane as the outer wall of the outer cylinder.

[0015] Secondly, the present invention also provides a method for using an outdoor gamma-ray monitor, characterized in that the method of using an outdoor gamma-ray monitor includes the following steps: S1, Select the multi-directional monitoring mode. Drive the connecting part through the second driving component to move the outer cylinder in a straight line toward the side away from the rotating mechanism, so that the first channel is exposed to the external environment. External γ rays enter the detector through the uniformly distributed first channel for multi-directional monitoring. S2, the monitor body calculates and analyzes the total count rate in real time. If the total count rate exceeds the background threshold, it is determined to be a radiation anomaly and triggers a mode switch to enter the directional monitoring mode. S3, in directional monitoring mode, the outer cylinder is driven back to the initial position by the second driving component, and its first channel and second channel are at the same height. The outer cylinder on the rotating disk is driven to rotate circumferentially by the first driving component, so that the second channel is aligned with each first channel in turn. It stops at each aligned position, measures the radiation intensity in the corresponding direction, and obtains the position of the highest radiation intensity. S4, when monitoring stops, the first driving component drives the outer cylinder to rotate circumferentially between two adjacent first channels, and the first and second sealing components abut against the surface of the inner cylinder to achieve sealing and radiation shielding between the outer and inner cylinders.

[0016] The outdoor gamma-ray monitoring instrument and its usage method of the present invention have the following advantages over the prior art: By combining the moving and rotating mechanisms, flexible switching between multi-directional and directional monitoring modes is achieved. During multi-directional monitoring, all channels are opened simultaneously for efficient and rapid surveying. During directional monitoring, a single narrow channel effectively isolates radiation interference from non-target directions, significantly improving the signal-to-noise ratio. This not only solves the problem of missed detection of weak radiation sources caused by signal crosstalk in the survey mode of traditional equipment, but also achieves the combination of rapid panoramic scanning and high-sensitivity identification and positioning, improving the overall efficiency of outdoor gamma-ray monitoring. During the lifting and lowering process of the outer cylinder, the cleaning component can scrape the outer wall of the outer cylinder to remove the adhering substances on its surface, effectively preventing contaminants from affecting the movement of moving parts. At the same time, it can also clean the miniature camera embedded in the outer cylinder, ensuring the effectiveness of external monitoring. By using a combination of a first seal, a second seal, and an elastic element, the first and second seals can always fit against the surface of the inner cylinder in both the circumferential and axial directions, maintaining a good sealing effect during rotation and lifting movements. Furthermore, the tungsten rubber layer in the seals can form a shielding barrier while achieving a seal, effectively improving the accuracy of monitoring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural view of the outdoor gamma-ray monitoring instrument of the present invention; Figure 2 This is a front sectional view of the outdoor gamma-ray monitoring instrument of the present invention; Figure 3 This is a schematic diagram showing the position between the first channel and the second channel of the outdoor gamma-ray monitoring instrument of the present invention; Figure 4 This is a cross-sectional view of the base of the outdoor gamma-ray monitor of the present invention; Figure 5 This is a schematic diagram of the connection structure between the first and second sealing components of the outdoor gamma-ray monitoring instrument of the present invention. Figure 6 This is a schematic diagram of the connection structure between the first sealing element and the inner cylinder of the outdoor gamma-ray monitoring instrument of the present invention; Figure 7 This is a cross-sectional view of the sealing structure of the outdoor gamma-ray monitor of the present invention. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-7 As shown, an outdoor gamma-ray monitor of the present invention includes a monitor body 1, a detector 2, an inner cylinder 3, a rotating mechanism 4, a moving mechanism 5, and an outer cylinder 6. The detector 2 is mounted on the monitor body 1 and is used to receive gamma rays and convert them into electrical signals. The inner cylinder 3 is mounted on the monitor body 1 and sleeved outside the detector 2. The inner cylinder 3 has multiple spaced and non-communicating first channels 300 on its wall. The rotating mechanism 4 is mounted on the monitor body 1 and sleeved outside the inner cylinder 3, and can rotate around the axis of the inner cylinder 3. The moving mechanism 5 is mounted on the rotating mechanism 4 and has a mechanism that can move along the inner cylinder 6. The moving part moves linearly in the axial direction; the outer cylinder 6 is set on the moving part of the moving mechanism 5 and sleeved on the outside of the inner cylinder 3, and is sealed to the outer wall of the inner cylinder 3. A second channel 600 is opened on the outer side of the outer cylinder 6; the detector 2 is on the same straight line as the axis of the inner cylinder 3 and the outer cylinder 6; the moving part of the moving mechanism 5 drives the outer cylinder 6 to move toward the side away from the monitoring instrument body 1, so that multiple first channels 300 are in contact with the external environment for multi-directional monitoring; the rotation mechanism 4 drives the outer cylinder 6 on the moving mechanism 5 to rotate, so that the second channel 600 selectively connects with the first channel 300 in the corresponding monitoring direction for directional monitoring.

[0021] It should be noted that in the multi-directional monitoring and survey mode, the moving mechanism 5 drives the outer cylinder 6 to rise axially, so that its cylinder wall no longer blocks the multiple first channels 300 on the inner cylinder 3, thereby enabling the detector 2 to receive omnidirectional gamma rays synchronously through all channels. In the directional mode, the moving mechanism 5 drives the outer cylinder 6 to fall axially back to its initial position, so that it wraps around the outside of the inner cylinder 3. At this time, the only second channel 600 on the outer cylinder 6 is at the same height as all the first channels 300 on the inner cylinder 3. The rotating mechanism 4 drives the outer cylinder 6 to rotate, so that the second channel 600 is aligned with the corresponding first channel 300, forming a unique narrow detection path; thus, the monitoring direction can be selected, so that the detector 2 only receives gamma rays from that direction.

[0022] Understandably, the lifting of the moving mechanism 5 and the rotation of the slewing mechanism 4 enable flexible switching between two working modes: multi-directional monitoring and directional monitoring. In multi-directional monitoring, all first channels 300 are activated simultaneously, achieving efficient and rapid environmental surveys. In directional monitoring, the first channel 300 and the second channel 600 form a unique, narrow detection path, isolating radiation interference from non-target directions and significantly improving the signal-to-noise ratio. This not only solves the problem of missed detection of weak radioactive sources caused by signal crosstalk in the survey mode of traditional monitoring equipment, but also achieves an organic combination of rapid panoramic scanning and high-sensitivity identification and positioning, greatly improving the overall efficiency of outdoor gamma-ray monitoring.

[0023] In this embodiment, the plurality of first channels 300 are evenly distributed in a ring along the axis of the inner cylinder 3, and the inner dimensions of the first channel 300 and the second channel 600 are matched, and the port width of the first channel 300 is smaller than the width between two adjacent second channels 600.

[0024] It should be noted that the multiple first channels 300 are evenly distributed in a ring along the axis of the inner cylinder 3 to ensure comprehensive detection of radiation from all directions. The inner dimensions of the first channel 300 and the second channel 600 are matched. When the two channels are perfectly aligned, their through path is smooth and of consistent size, avoiding additional radiation scattering and reflection caused by sudden expansion or contraction of the channel. This ensures that gamma rays can pass through with minimal interference, thereby maintaining the purity of the energy spectrum, reducing energy spectrum distortion, and facilitating accurate subsequent nuclide identification.

[0025] Specifically, in this embodiment, the port width of the first channel 300 is equal to the width between two adjacent second channels 600. When the first channel 300 and the second channel 600 are in a completely staggered position by the rotation mechanism 4, the entire opening area of ​​the first channel 300 is completely covered by the solid cylinder wall of the outer cylinder 6, thereby cutting off the connection between the first channel 300 and the second channel 600. This allows the detector 2 to be dynamically enclosed in a complete shielded cavity composed of inner and outer cylinder walls, effectively preventing the intrusion of pollutants such as moisture and dust, protecting the safety of the core detector, and reducing the continuous irradiation of the detector by the background radiation of the environment.

[0026] The rotary mechanism 4 in this embodiment includes a base 41, a rotating disk 42, a rotary gear 43, a first driving member 44, and a driving gear 45. The base 41 is fixed on the monitor body 1 and is arranged around the outside of the detector 2. The inner cylinder 3 is threadedly connected to the inside of the base 41. The rotating disk 42 is arranged around the base 41 and is located outside the inner cylinder 3. It can rotate circumferentially along the axis of the inner cylinder 3. The rotary gear 43 is fixed on the outside of the rotating disk 42. The first driving member 44 is fixed on the monitor body 1 and is located on one side of the rotary gear 43. The driving gear 45 is fixed on the output shaft of the first driving member 44 and meshes with the rotary gear 43.

[0027] It should be noted that in this embodiment, the rotary mechanism drives the drive gear 45 on the output shaft to rotate through the first drive member 44. The drive gear 45 meshes with the rotary gear 43 fixed on the outside of the rotating disk 42, converting the rotational motion of the motor into the circumferential rotation of the rotating disk 42 around the axis of the inner cylinder 3. The moving mechanism 5 and the outer cylinder 6 mounted on the rotating disk 42 rotate synchronously, thereby achieving precise alignment and orientation switching between the second channel 600 on the outer cylinder 6 and the specific first channel 300 on the inner cylinder 3, and completing the orientation selection of the directional monitoring mode.

[0028] The rotary mechanism 4 in this embodiment also includes a guide member 46 and a plurality of rolling members 47. The base 41 has an annular groove 400. The guide member 46 is fixed on the side of the rotating disk 42 near the base 41 and extends into and slides within the annular groove 400. The inner wall of the annular groove 400 and the side of the guide member 46 away from the rotating disk 42 are both provided with ball grooves 410. The plurality of rolling members 47 are movably embedded between two opposite ball grooves 410 for supporting and sliding the rotating disk 42.

[0029] It should be noted that this rotary mechanism uses a guide 46 fixed on the rotating disk 42 to be embedded in the annular groove 400 of the base 41, forming axial and radial motion constraints. When the rotating disk 42 is driven to rotate, multiple rolling elements 47 embedded between the annular groove 400 and the corresponding ball grooves 410 on the guide 46 roll accordingly, transforming traditional sliding friction into rolling friction, reducing frictional resistance and wear during the rotary motion, improving transmission efficiency and motion stability, and extending the service life of the mechanism.

[0030] The moving mechanism 5 in this embodiment includes a bracket 51, a second driving member 52, a lead screw 53, a moving member 54, and a connecting member 55. The bracket 51 is fixed on the side of the rotating disk 42 away from the base 41. The second driving member 52 is disposed on the bracket 51, and the lead screw 53 is fixed on the output shaft of the second driving member 52. The lead screw 53 is arranged parallel to the axial direction of the inner cylinder 3. The moving member 54 is threadedly connected to the outside of the lead screw 53. One end of the connecting member 55 is fixed to the moving member 54, and the other end is slidably connected to the bracket 51. The connecting member 55 has a mounting hole. The outer cylinder 6 is threadedly connected to the mounting hole. The second driving member 52 drives the lead screw 53 to move the outer cylinder 6 linearly along the axial direction of the inner cylinder 3.

[0031] It should be noted that the moving mechanism 5 drives the lead screw 53 to rotate through the second driving member 52. The moving member 54, which is threaded with the lead screw 53, converts the rotational motion into linear motion along the axis of the inner cylinder 3. The moving member 54 drives the outer cylinder 6 to move synchronously through the connecting member 55. The sliding connection between the connecting member 55 and the bracket 51 effectively constrains the circumferential rotation of the moving member, ensuring that the outer cylinder 6 maintains a stable linear trajectory during the lifting process, thereby realizing the accurate switching of the monitoring mode between all-round detection and directional detection.

[0032] It should be noted that by fixing the inner cylinder 3 to the main body 1 of the monitoring instrument with threads, and by fixing the outer cylinder 6 through the slot and the connector 55 with threads, the inner cylinder 3 and the outer cylinder 6 can be disassembled, which facilitates internal maintenance.

[0033] The moving mechanism 5 in this embodiment also includes a fixing member 56, a sliding member 57, a top plate 58, and a cleaning member 59. The fixing member 56 is fixed on the bracket 51 and is located on the side of the outer cylinder 6 away from the lead screw 53, and is symmetrically arranged with the lead screw 53. The sliding member 57 is slidably connected to the outside of the fixing member 56 and fixedly connected to the connecting member 55, and is used to limit the connection member 55. The top plate 58 is disposed between the fixing member 56 and the end of the lead screw 53 away from the bracket 51, and the fixing member 56 is fixedly connected to the top plate 58, and the lead screw 53 is rotatably connected to the top plate 58. The top plate 58 has a slot, and the slot, the mounting hole, and the axis of the outer cylinder 6 are on the same straight line. The cleaning member 59 is detachably disposed in the slot, and the cleaning member 59 is in contact with the outer surface of the outer cylinder 6.

[0034] It should be noted that the moving mechanism 5, by adding a fixed part 56 and a sliding part 57, constructs a second guide pair parallel to the lead screw 53. When the second driving part 52 drives the lead screw 53 to rotate, the moving part 54 drives the connecting part 55 to move axially. At this time, the sliding part 57 slides synchronously on the fixed part 56, forming a stable two-point support, which effectively eliminates the possible torsion or jamming of the connecting part 55 and the outer cylinder 6 it carries during the movement. In addition, the cleaning part 59 installed in the slot of the top plate 58 automatically scrapes the outer surface of the outer cylinder 6 as it moves up and down, removing the adhering substances on its surface, effectively preventing contaminants from affecting the movement of the moving parts, ensuring the stability of the structure, and at the same time cleaning the miniature camera 12 embedded in the outer cylinder 6, ensuring the effectiveness of external monitoring.

[0035] This embodiment also includes at least two first sealing elements 7, second sealing elements 8, and several elastic elements 9. The inner side of the outer cylinder 6 has at least two first grooves 310 along its axial direction, and these at least two first grooves 310 are located on opposite sides of the second channel 600 along its axial direction. At least two first sealing elements 7 are disposed within their respective first grooves 310, and each first sealing element 7 can slide along the radial direction of the first groove 310. The first sealing elements 7 abut against the inner side of the first groove 310 and the surface of the inner cylinder 3, respectively, to provide a sealing connection between the outer cylinder 6 and the inner cylinder 3 in the axial direction. The inner side of the outer cylinder 6 has at least two second grooves 32 along its circumferential direction. 0, and at least two second grooves 320 are respectively located on both sides of the circumferential direction of the second channel 600; at least two second seals 8 are respectively disposed in each corresponding second groove 320, and the second seals 8 can slide along the radial direction of the second groove 320, and the second seals 8 respectively abut against the inner side of the second groove 320 and the surface of the inner cylinder 3, for sealing the outer cylinder 6 and the inner cylinder 3 in the circumferential direction; a number of elastic elements 9 are respectively disposed in each first groove 310 and second groove 320, and the side of the first seals 7 and the second seals 8 away from the inner cylinder 3 are fixedly connected to the corresponding elastic elements 9, so that the first seals 7 and the second seals 8 are always in contact with the surface of the inner cylinder 3.

[0036] It should be noted that, in the axial direction, at least two first seals 7, under the continuous elastic force of the elastic element 9, are tightly fitted radially against the surface of the inner cylinder 3 to form an axial sealing band, effectively preventing contaminants from entering through the axial gap during the lifting and lowering of the outer cylinder 6; in the circumferential direction, at least two second seals 8 are also fitted against the inner cylinder 3 under the elastic force to form a circumferential sealing band, ensuring reliable connection of the sealing interface when the outer cylinder 6 rotates; the elastic element 9 provides radial pressure compensation for all seals, enabling them to adapt to minor unevenness on the cylinder surface and wear caused by long-term operation, thereby maintaining a good sealing effect during rotation and lifting movements.

[0037] In addition, the movement distance of the first sealing element 7 and the second sealing element 8 within the first groove 310 and the second groove 320 is less than the distance between the outer cylinder 6 and the inner cylinder 3, preventing the sealing element from dislodging from the groove and ensuring the sealing effect. Furthermore, the two ends of the second sealing element 8 abut against the surfaces of the two opposite first sealing elements 7. Therefore, the first sealing element 7 and the second sealing element 8 form a U-shaped sealing structure on the outside of the second passage 600, both of which fit against the surface of the inner cylinder 3, achieving an effective sealing effect.

[0038] In this embodiment, both the first sealing element 7 and the second sealing element 8 include an elastic rubber layer 781 and a tungsten rubber layer 782. The elastic rubber layer 781 covers the outside of the tungsten rubber layer 782, which is used to provide flexible sealing and radiation shielding between the outer cylinder 6 and the inner cylinder 3.

[0039] It should be noted that when the seal is pressed tightly against the surface of the inner cylinder 3 under the pressure of the elastic element 9, the outer elastic rubber layer 781 undergoes elastic deformation, filling all gaps between the outer cylinder 6, the inner cylinder 3, and the groove, thus achieving a reliable sealing effect. At the same time, the tungsten rubber layer 782 encapsulated within can effectively interact with the passing γ photons through photoelectric effect and Compton scattering, thereby absorbing and attenuating γ radiation attempting to leak from the sealing interface. This allows the entire sealing interface to achieve physical sealing while also forming a continuous radiation shielding barrier. Specifically, the elastic rubber layer 781 is an elastic sealing strip made of polytetrafluoroethylene.

[0040] This embodiment also includes a solar panel 10, a power module 11, and a miniature camera 12. The solar panel 10 is disposed on one side of the monitoring instrument body 1 and is used to convert solar energy into electrical energy. The power module 11 is disposed inside the monitoring instrument body 1 and is used to store the converted electrical energy and supply power to the monitoring instrument body 1. The miniature camera 12 is embedded in the outer cylinder 6 and is used to collect video of the external environment. The mirror of the miniature camera 12 is on the same plane as the outer wall of the outer cylinder 6.

[0041] It should be noted that the solar panel 10 can convert light energy into electrical energy and store it in the power module 11, providing continuous power for the entire monitoring instrument and enabling long-term outdoor monitoring. At the same time, the miniature camera 12, which is embedded in the outer cylinder 6 and whose mirror surface is flush with the outer wall, rotates synchronously with the outer cylinder. Its field of view is consistent with the detection direction of the second channel 600, and it can capture and transmit on-site environmental video images in the monitoring direction in real time.

[0042] Additionally, it should be noted that detector 2 captures γ-ray photons through an internal NaI scintillation crystal. The photons interact with the crystal to generate scintillation light, which is then converted into an electrical pulse signal by a photomultiplier tube. The amplitude of this pulse signal is proportional to the energy of the γ-ray photon, achieving the initial conversion of γ-ray energy. After receiving the electrical pulse signal from the detector, the monitoring instrument 1 performs statistical analysis on the pulse amplitude through a digital multichannel analyzer to generate a γ-ray energy spectrum. The system background identifies characteristic energy peaks in the energy spectrum, automatically identifies nuclides, and calculates the activity concentration by combining the count rate. Finally, the processed spectral data, nuclide information, and radiation level are uploaded to the monitoring center through the communication module. This signal conversion and energy spectrum analysis technology is a mature existing technology and will not be elaborated here.

[0043] Secondly, the present invention also provides a method for using an outdoor gamma-ray monitor, comprising the following steps: S1, Select the multi-directional monitoring mode, and drive the connecting piece 55 through the second driving component 52 to move the outer cylinder 6 in a straight line toward the side away from the rotating mechanism 4, so that the first channel 300 is exposed to the external environment, and the external γ rays enter the detector 2 through the uniformly distributed first channel 300 for multi-directional monitoring. S2, the monitoring instrument body 1 calculates and analyzes the total count rate in real time. If the total count rate exceeds the background threshold, it is determined to be a radiation anomaly and triggers a mode switch to enter the directional monitoring mode. S3, in the directional monitoring mode, the outer cylinder 6 is driven back to the initial position by the second driving component 52, and its first channel 300 and second channel 600 are at the same height. The outer cylinder 6 on the rotating disk 42 is driven to rotate circumferentially by the first driving component 44, so that the second channel 600 is aligned with each of the first channels 300 in turn, stops at each aligned position, measures the radiation intensity in the corresponding direction, and obtains the position of the highest radiation intensity. It should be noted that during the directional monitoring process, the first driving component 44 drives the outer cylinder 6 to rotate in a step-by-step manner, stopping at each second channel 600 and measuring the radiation intensity in that direction. The system automatically records each azimuth angle and its corresponding count rate data. At the same time, the miniature camera 12 simultaneously captures on-site images. Based on the collected omnidirectional data, the system synthesizes a polar coordinate radiation intensity distribution map. This map can intuitively display the range and boundary of radioactive contamination. By comparing the count rates in each direction, the system automatically identifies and locks the direction with the highest count rate, which is the location of the highest radiation intensity.

[0044] S4, when the monitoring is stopped, the first drive member 44 drives the outer cylinder 6 to rotate circumferentially between two adjacent first channels 300, and abuts against the surface of the inner cylinder 3 through the first seal member 7 and the second seal member 8, thereby achieving sealing and radiation shielding between the outer cylinder 6 and the inner cylinder 3.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An outdoor gamma-ray monitor, characterized in that, The monitoring instrument comprises a monitoring instrument body (1), a detector (2), an inner cylinder (3), a rotating mechanism (4), a moving mechanism (5) and an outer cylinder (6), wherein, The detector (2) is arranged on the monitoring instrument body (1) and is used for receiving gamma rays and converting the gamma rays into electric signals; The inner cylinder (3) is arranged on the monitoring instrument body (1) and is sleeved outside the detector (2), a plurality of first channels (300) which are spaced and not communicated with each other are formed in the cylinder wall of the inner cylinder (3); The rotating mechanism (4) is arranged on the monitoring instrument body (1) and is sleeved outside the inner cylinder (3) and can rotate around the axis of the inner cylinder (3); The moving mechanism (5) is arranged on the rotating mechanism (4) and has a moving part which can move linearly along the axial direction of the inner cylinder (3); The outer cylinder (6) is arranged on the moving part of the moving mechanism (5) and is sleeved outside the inner cylinder (3) and is in sealing connection with the outer wall of the inner cylinder (3), and a second channel (600) is formed in the outer side of the outer cylinder (6); The detector (2), the inner cylinder (3) and the outer cylinder (6) are arranged on the same straight line, the moving part of the moving mechanism (5) drives the outer cylinder (6) to move away from the monitoring instrument body (1), so that the plurality of first channels (300) are in contact with the external environment for multidirectional monitoring; The rotating mechanism (4) drives the outer cylinder (6) on the moving mechanism (5) to rotate, so that the second channel (600) is selectively communicated with the first channel (300) in the corresponding monitoring direction for directional monitoring.

2. The outdoor gamma-ray monitor of claim 1, wherein: The plurality of first channels (300) are uniformly distributed in a ring shape along the axis of the inner cylinder (3), the inner side dimensions of the first channels (300) and the second channels (600) are matched, and the port width of the first channels (300) is smaller than the width between two adjacent second channels (600).

3. The outdoor gamma-ray monitor of claim 1, wherein: The rotating mechanism (4) comprises a base (41), a rotating disc (42), a rotating gear (43), a first driving member (44) and a driving gear (45), wherein, The base (41) is fixed on the monitoring instrument body (1) and is annularly arranged outside the detector (2), and the inner cylinder (3) is threadedly connected to the inner side of the base (41); The rotating disc (42) is annularly arranged on the base (41) and is located outside the inner cylinder (3) and can rotate circumferentially along the axis of the inner cylinder (3); The rotating gear (43) is fixed outside the rotating disc (42); The first driving member (44) is fixed on the monitoring instrument body (1) and is located on one side of the rotating gear (43), the driving gear (45) is fixed on the output shaft of the first driving member (44), and the driving gear (45) is engaged with the rotating gear (43).

4. The outdoor gamma-ray monitor of claim 3, wherein: The rotating mechanism (4) further comprises a guide member (46) and a plurality of rolling members (47), wherein, An annular groove (400) is formed in the base (41), the guide member (46) is fixed on one side of the rotating disc (42) close to the base (41) and extends into and is slidingly connected in the annular groove (400); The inner wall of the annular groove (400) and the side of the guide (46) away from the rotating disc (42) are provided with ball grooves (410), and a plurality of rolling elements (47) are movably embedded between the two ball grooves (410) to support and slide the rotating disc (42).

5. The outdoor gamma-ray monitor of claim 3, wherein: The moving mechanism (5) comprises a support (51), a second driving element (52), a screw rod (53), a moving element (54) and a connecting element (55), The support (51) is fixed to the side of the rotating disc (42) away from the base (41); The second driving element (52) is provided on the support (51), and the screw rod (53) is fixed to the output shaft of the second driving element (52); and the screw rod (53) is arranged in parallel along the axial direction of the inner cylinder (3); the moving element (54) is threadedly connected to the outer side of the screw rod (53); One end of the connecting element (55) is fixed to the moving element (54), the other side is slidably connected to the support (51), and the connecting element (55) is provided with a mounting hole; the outer cylinder (6) is threadedly connected in the mounting hole; The second driving element (52) drives the screw rod (53) to move the outer cylinder (6) linearly along the axial direction of the inner cylinder (3).

6. The outdoor gamma-ray monitor of claim 5, wherein: The moving mechanism (5) further comprises a fixing element (56), a sliding element (57), a top plate (58) and a cleaning element (59), wherein, The fixing element (56) is fixed to the support (51) and located at the side of the outer cylinder (6) away from the screw rod (53), and is symmetrically arranged with the screw rod (53); The sliding element (57) is slidably connected to the outer side of the fixing element (56) and fixedly connected with the connecting element (55) for limiting the connecting element (55); The top plate (58) is arranged between the fixing element (56) and the end of the screw rod (53) away from the support (51), and the fixing element (56) and the top plate (58) are fixedly connected, and the screw rod (53) is rotatably connected with the top plate (58); the top plate (58) is provided with a slot hole, and the slot hole is in the same straight line with the mounting hole and the axis of the outer cylinder (6); The cleaning element (59) is detachably arranged in the slot hole, and the cleaning element (59) is attached to the outer surface of the outer cylinder (6).

7. The outdoor gamma-ray monitor of claim 1, wherein: Further comprising at least two first sealing elements (7), a second sealing element (8) and a plurality of elastic elements (9), wherein, The inner side of the outer cylinder (6) is provided with at least two first embedding grooves (310) along the axial direction thereof, and the at least two first embedding grooves (310) are respectively located on both sides of the axial direction of the second channel (600); The at least two first sealing elements (7) are respectively arranged in the corresponding first embedding grooves (310), and the first sealing elements (7) can slide along the radial direction of the first embedding grooves (310), and the first sealing elements (7) respectively abut with the inner side of the first embedding grooves (310) and the surface of the inner cylinder (3), for sealingly connecting the outer cylinder (6) and the inner cylinder (3) in the axial direction; The inner side of the outer cylinder (6) is provided with at least two second embedding grooves (320) along the circumferential direction thereof, and the at least two second embedding grooves (320) are respectively located on both sides of the circumferential direction of the second channel (600); At least two second sealing members (8) are arranged in the corresponding second grooves (320), and the second sealing members (8) can slide in the radial direction of the second grooves (320), and the second sealing members (8) abut the inner side of the second grooves (320) and the surface of the inner cylinder (3) respectively, for sealingly connecting the outer cylinder (6) and the inner cylinder (3) in the circumferential direction; A plurality of elastic members (9) are arranged in the first grooves (310) and the second grooves (320), and the side of the first sealing member (7) and the second sealing member (8) away from the inner cylinder (3) is fixedly connected with the corresponding elastic member (9), so that the first sealing member (7) and the second sealing member (8) are always attached to the surface of the inner cylinder (3).

8. The outdoor gamma-ray monitor of claim 7, wherein: The first sealing member (7) and the second sealing member (8) each include an elastic rubber layer (781) and a tungsten rubber layer (782), wherein the elastic rubber layer (781) is wrapped on the outer side of the tungsten rubber layer (782), for flexible sealing and radiation shielding between the outer cylinder (6) and the inner cylinder (3).

9. The outdoor gamma-ray monitor of claim 1, wherein: Further comprising a solar panel (10), a power module (11) and a miniature camera (12), wherein, The solar panel (10) is arranged on one side of the monitor body (1), for converting solar energy into electrical energy; The power module (11) is arranged in the monitor body (1), for storing the converted electrical energy and supplying power to the monitor body (1); The miniature camera (12) is embedded on the outer cylinder (6), for collecting external environment video, and the mirror surface of the miniature camera (12) is in the same plane as the outer wall of the outer cylinder (6).

10. A use method of the outdoor gamma ray monitor, which is realized by using the outdoor gamma ray monitor according to any one of claims 1-9, comprising the following steps: S1, selecting a multi-directional monitoring mode, driving the connecting member (55) to drive the outer cylinder (6) to move linearly away from the rotary mechanism (4) through the second driving member (52), so that the first channels (300) are exposed to the external environment, and the external gamma rays enter the detector (2) through the uniformly distributed first channels (300) respectively, for multi-directional monitoring; S2, the monitor body 1 calculates and analyzes the total count rate in real time, and if the total count rate is detected to exceed the background threshold, it is determined that there is radiation anomaly, and the mode switching is triggered to enter the directional monitoring mode; S3, in the directional monitoring mode, the outer cylinder (6) is driven to return to the initial position through the second driving member (52), and the first channel (300) and the second channel (600) are at the same height, and the outer cylinder (6) on the rotating disc (42) is driven to rotate circumferentially through the first driving member (44), so that the second channel (600) is aligned with each first channel (300) in turn, and the radiation intensity in each aligned direction is measured to obtain the position of the highest radiation intensity; S4, when stopping monitoring, the first driving member (44) drives the outer cylinder (6) to rotate circumferentially between two adjacent first channels (300), and the first sealing member (7) and the second sealing member (8) abut the surface of the inner cylinder (3), so as to realize the sealing and radiation shielding between the outer cylinder (6) and the inner cylinder (3).

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