Neutron bubble detector counting device

Abstract

The utility model relates to the technical field of radiation detection and measurement, and discloses a neutron bubble detector counting device, which comprises a neutron bubble detector used for forming bubbles matched with neutron radiation dose; the supporting module is used for bearing the neutron bubble detector and controlling the neutron bubble detector to rotate circumferentially; the backlight module is used for providing a backlight source for the neutron bubble detector; and the imaging module is arranged opposite to the backlight module, enables the neutron bubble detector to be located between the backlight module and the imaging module, and is used for imaging of the neutron bubble detector, so that bubble counting is facilitated. Through optical-mechanical linkage design, under the condition that complex algorithm preprocessing does not need to be introduced, native enhanced collection of bubble physical characteristics is achieved, a reliable data basis is established for follow-up automatic counting, and meanwhile a data basis is provided for follow-up data tracing and auditing.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation detection and measurement, and in particular, to a neutron bubble detector counting device. Background Technique

[0002] The neutron bubble detector is a radiation detection device based on the epithermal droplet technology and is widely used for measuring neutron radiation dose. Its working principle is to disperse tiny droplets in a superheated state in a gel. When neutrons are transmitted through it, recoil protons will be generated through elastic collisions. When the recoil protons transport in the high-pressure gel, they deposit energy due to collision ionization, causing the droplets to quickly vaporize to form visible bubbles with the naked eye. The number of these bubbles is positively correlated with the dose of neutron radiation. Therefore, accurately counting the number of bubbles is a key step in evaluating the intensity of neutron radiation.

[0003] Traditional bubble counting methods mainly rely on manual visual observation or simple microscope-assisted manual counting. Although this method is easy to operate, in the case of dealing with a large number of detectors or high bubble density scenarios, it has the following deficiencies: First, the efficiency of manual counting is low and it is difficult to meet the detection requirements of large-scale and high-throughput; second, manual counting is easily affected by the subjective judgment of the operator, resulting in large counting errors; in addition, it is difficult to achieve automatic storage and management of data by manual operation, which is not conducive to data traceability and auditing. Summary of the Utility Model

[0004] The utility model provides a neutron bubble detector counting device. Through an optical-mechanical linkage design, without introducing complex algorithm preprocessing, it realizes the native enhanced acquisition of the physical characteristics of bubbles, establishes a reliable data basis for subsequent automatic counting, and also provides a data basis for subsequent data traceability and auditing, so as to solve the technical problems of the bubble counting method for neutron bubble detectors, such as low efficiency, large error, and being not conducive to data traceability and auditing.

[0005] The utility model provides a neutron bubble detector counting device, including: a neutron bubble detector for forming bubbles matching the neutron radiation dose; a support module for carrying the neutron bubble detector and controlling the circumferential rotation of the neutron bubble detector; a backlight module for providing a backlight source for the neutron bubble detector; and an imaging module arranged opposite to the backlight module and enabling the neutron bubble detector to be between the backlight module and the imaging module for imaging the neutron bubble detector to facilitate bubble counting.

[0006] Further, the backlight module adopts a narrowband light source.

[0007] Furthermore, the imaging module includes a camera, an imaging lens and a narrow-band filter; the imaging lens is arranged at the front end of the camera and coaxially with the photosensitive element of the camera, and the narrow-band filter is arranged at one end of the imaging lens close to the camera.

[0008] Furthermore, the narrowband filter has an annular base on its outer periphery, a hand-held portion is provided on the side of the annular base, an insertion interface is provided on the imaging lens, the annular base is assembled in the imaging lens via the insertion interface and the insertion interface is covered by the hand-held portion, thereby enabling the narrowband filter to be installed in place in the imaging lens; or the narrowband filter has an annular base on its outer periphery, and the annular base is connected to the internal thread of the imaging lens via an external thread.

[0009] Furthermore, the supporting module adopts an electric rotating table.

[0010] Furthermore, the supporting module includes: a sleeve seat, which is used to be plugged, assembled and fixed with the neutron bubble detector and to expose the material section of the neutron bubble detector; and a driving device, which is used to drive the sleeve seat to rotate in the circumferential direction.

[0011] Furthermore, the driving device adopts a driving motor, a servo motor or a steering gear.

[0012] Furthermore, a plurality of sleeve seats are provided, and the plurality of sleeve seats are arranged at intervals along a direction perpendicular to a connection direction of the backlight module and the imaging module.

[0013] Furthermore, the driving devices and the sleeve seats are arranged in one-to-one correspondence; or two adjacent groups of sleeve seats are connected by a gear meshing structure, and one group of driving devices drives one group of sleeve seats to rotate to drive the other sleeve seats to work in conjunction through the gear meshing structure; or two adjacent groups of sleeve seats are connected by a synchronous belt structure, and one group of driving devices drives one group of sleeve seats to rotate to drive the other sleeve seats to work in conjunction through the synchronous belt structure.

[0014] Furthermore, the imaging modules and the sleeve seats are arranged in one-to-one correspondence; or the sleeve seats are all within the field of view of a group of imaging modules, and a group of imaging modules is used to simultaneously capture images of neutron bubble detectors on multiple groups of sleeve seats.

[0015] Furthermore, the backlight module and / or the imaging module are arranged on a slide rail, and the slide rail is arranged along a connection direction of the backlight module and the imaging module.

[0016] The utility model has the following beneficial effects:

[0017] 1. The symmetrical arrangement of the backlight module and the imaging module forms a transmissive light path, which produces a bright field diffraction effect at the edge of the bubble. The three-dimensional distribution of the bubble in the high-pressure gel medium is compressed into a two-dimensional high-contrast projection, ensuring the synchronous visualization of bubbles at different depths.

[0018] 2. The support module drives the circumferential rotation of the neutron bubble detector, enabling the detector to rotate during imaging. Through multi-angle projection, the occlusion effect caused by bubble stacking or uneven gel is eliminated by fusion.

[0019] 3. The backlight module and the imaging module form a closed optical path structure, effectively isolating the interference of ambient stray light; the slight turbidity change caused by neutron irradiation of the gel medium is compensated by the stable backlight intensity, maintaining the consistency of imaging grayscale.

[0020] 4. The mechanical coupling of the detection-support-optical components constitutes a unique identifier for the physical carrier. The spatial topological relationship of the bubbles during rotation is bound to the time-series imaging, providing a spatial coordinate reference for subsequent counting.

[0021] 5. Through the optical-mechanical linkage design, the native enhanced acquisition of the physical properties of the bubbles is realized, establishing a reliable data basis for subsequent automatic counting, and also providing a data basis for subsequent data traceability and auditing.

[0022] In addition to the purposes, features, and advantages described above, the present utility model has other purposes, features, and advantages. The following will refer to the drawings for a further detailed description of the present utility model. Description of the Drawings

[0023] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the neutron bubble detector counting device according to the preferred embodiment of the present utility model;

[0025] Figure 2 is a schematic split structure diagram of the neutron bubble detector counting device according to the preferred embodiment of the present utility model;

[0026] Figure 3 is a schematic structural diagram of the imaging module with quick disassembly and replacement of the narrow-band filter according to the preferred embodiment of the present utility model.

[0027] Legend Explanation:

[0028] 100, neutron bubble detector; 200, support module; 201, sleeve seat; 202, drive device; 300, backlight module; 400, imaging module; 401, camera; 402, imaging lens; 4021, insertion interface; 403, narrow-band filter; 4031, annular base; 4032, handheld part. Detailed Embodiments

[0029] The embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings. However, the present utility model can be implemented in many different ways defined and covered by the following.

[0030] Figure 1 It is a schematic structural diagram of a neutron bubble detector counting device according to a preferred embodiment of the present utility model; Figure 2 It is a schematic split structure diagram of a neutron bubble detector counting device according to a preferred embodiment of the present utility model; Figure 3 It is a schematic structural diagram of an imaging module with a narrow-band filter for quick disassembly and replacement according to a preferred embodiment of the present utility model.

[0031] As Figure 1 and Figure 2 shown, the neutron bubble detector counting device of this embodiment includes: a neutron bubble detector 100, which is used to form bubbles matching the neutron radiation dose; a support module 200, which is used to carry the neutron bubble detector 100 and control the circumferential rotation of the neutron bubble detector 100; a backlight module 300, which is used to provide a backlight source for the neutron bubble detector 100; and an imaging module 400, which is arranged opposite to the backlight module 300 and makes the neutron bubble detector 100 located between the backlight module 300 and the imaging module 400, and is used for imaging the neutron bubble detector 100 to facilitate bubble counting. For the neutron bubble detector counting device of the present utility model, the symmetric arrangement of the backlight module 300 and the imaging module 400 forms a transmissive optical path, which produces a bright-field diffraction effect at the bubble edge and solves the problem of gel interface specular reflection interference in traditional reflective imaging; the three-dimensional distribution of bubbles in the high-pressure gel medium is compressed into a two-dimensional high-contrast projection to ensure the synchronous visualization of bubbles at different depths. The support module 200 drives the circumferential rotation of the neutron bubble detector 100, enabling the detector to rotate self during imaging. Through multi-angle projection, the occlusion effect caused by bubble stacking or gel non-uniformity is fused and eliminated; the two-dimensional occlusion defect of static single imaging is replaced by the quasi-three-dimensional information acquisition of rotational scanning. The backlight module 300 and the imaging module 400 form a closed optical path structure, effectively isolating the interference of ambient stray light; the slight turbidity change of the gel medium caused by neutron irradiation is compensated by a stable backlight intensity to maintain the imaging gray-scale consistency. The mechanical coupling of the detection-support-optical components constitutes a unique identifier for the physical carrier. The spatial topological relationship of bubbles during rotation is bound to the time-series imaging, providing a spatial coordinate reference for subsequent counting. Through the optical-mechanical linkage design, without introducing complex algorithm preprocessing, the native enhanced acquisition of bubble physical characteristics is realized, establishing a reliable data basis for subsequent automatic counting, and also providing a data basis for subsequent data traceability and auditing.

[0032] In this embodiment, the backlight module 300 uses a narrowband light source. Optionally, the wavelength of the narrowband light source is in the 520nm-535nm band. The specific wavelength of the narrowband light source (such as 550nm±5nm, or 527 nm±7nm) avoids the main absorption / scattering band of the gel material, reduces the non-uniform light scattering caused by the vibration of gel molecules or impurities, and improves the refractive contrast of the bubble edge; the difference in refractive index between the bubble and the gel produces a stronger Fresnel diffraction effect under narrowband light irradiation, making the light and dark transition of the bubble outline steeper (edge ​​sharpening), and reducing the probability of misjudgment of the fuzzy boundary by the image segmentation algorithm; the imaging module 400 can be synchronously configured with a bandpass filter matching the narrowband wavelength to form a "light source-filter" collaborative system, effectively suppressing the interference of non-characteristic wavelength components in the ambient light and improving the signal-to-noise ratio; monochromatic light eliminates the spherical aberration / chromatic aberration caused by the dispersion of the wide-spectrum light source, ensures the consistency of the imaging focal plane of bubbles at different depths, and avoids counting omissions caused by wavelength-dependent focal length offset. Through spectral matching at the physical optical level, the basic signal-to-noise ratio of bubble imaging is pre-optimized at the light source end, providing "clean" raw image data for subsequent machine vision processing.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the imaging module 400 includes a camera 401, an imaging lens 402 and a narrowband filter 403; the imaging lens 402 is arranged at the front end of the camera 401 and coaxially with the photosensitive element of the camera 401, and the narrowband filter 403 is arranged at the end of the imaging lens 402 close to the camera 401. The imaging module 400 uses the coordinated arrangement of the camera 401, the imaging lens 402 and the narrowband filter 403. The narrowband filter 403 is strictly matched with the wavelength of the narrowband light source of the backlight module 300 to form a spectral signal screening, and only the characteristic wavelength of the bubble diffraction is allowed to pass through the filter, which completely suppresses the ambient stray light and other band interference, and improves the image signal-to-noise ratio; the narrowband filter 403 is placed at the end of the imaging lens 402 close to the camera 401, which can block the ghost flare and glare glare generated by multiple reflections inside the lens. Avoid blurring of bubble imaging edges due to stray light interference; narrowband filter 403 is coaxially arranged with imaging lens 402 to ensure the consistency of the propagation path of monochromatic light in the lens group, reduce spherical aberration and chromatic aberration caused by wavelength shift, keep the imaging focal plane of bubbles at different depths stable, and avoid missing counts; the combination of narrowband light and narrowband filter 403 makes the bubble interface diffraction sharper, and combined with high-resolution camera 401 and imaging lens 402, the outline of tiny bubbles can be clearly distinguished, providing high-contrast raw data for subsequent image segmentation algorithms. Through the integrated coordination of optical path, filtering, and photosensitivity, "optical purification" of bubble imaging is achieved at the hardware level, reducing the need for post-algorithm compensation and improving the accuracy and reliability of counting.

[0034] likeFigure 3 As shown, in this embodiment, the narrowband filter 403 is provided with an annular base 4031 on its outer periphery, and a hand-held portion 4032 is provided on the side of the annular base 4031; an insertion interface 4021 is provided on the imaging lens 402, and the annular base 4031 is inserted and assembled into the imaging lens 402 through the insertion interface 4021 and the insertion interface 4021 is covered by the hand-held portion 4032, so that the narrowband filter 403 is installed in place in the imaging lens 402. The insertion and mating structure of the annular base 4031 and the insertion interface 4021 ensures that the installation position of the narrowband filter 403 is strictly coincident with the optical axis of the imaging lens 402, avoiding the possible inclination or eccentricity problems of the traditional screw-in type filter, and ensuring the optical consistency of the imaging system; the hand-held portion 4032 covers the insertion interface 4021 after insertion, forming a physical barrier to prevent external dust or foreign objects from entering the lens interior and contaminating optical components such as lenses or sensors, and at the same time reducing the risk of lens fogging caused by changes in environmental temperature and humidity; the hand-held portion 4032 provides a tool-free operation plug-in interface, which is convenient for the quick disassembly and assembly when replacing narrowband filters 403 with different wavelengths (such as when adapting to different gel media), without disassembling the entire lens group, reducing the maintenance complexity; the rigid insertion structure of the annular base 4031 is more stable than the traditional snap or adhesive method, and can effectively prevent the filter from loosening or displacing in a moving or vibrating environment of the device, such as in a vehicle-mounted detection scenario, ensuring the optical stability for long-term use. Through mechanical-optical integration optimization, while ensuring the precise positioning of the filter, the sealing performance, maintainability and environmental adaptability are taken into account, and the reliability and service life of the imaging system are improved from the hardware level.

[0035] In this embodiment, the narrowband filter 403 is provided with an annular base 4031 on its outer periphery, and the annular base 4031 is connected to the internal thread of the imaging lens 402 through an external thread. The narrowband filter 403 is screwed into the imaging lens 402 through the thread, and the imaging lens 402 is fixed to the camera 401 through the thread. The narrowband filter 403 has an external thread, the front end portion of the camera 401 has an internal thread, and the imaging lens 402 has an internal thread. First, the narrowband filter 403 is screwed onto the front end of the camera 401, close to the sensitive surface of the camera 401, and then the imaging lens 402 is screwed onto the camera 401. Since the threaded portion of the camera is long enough, the imaging lens 402 can be screwed onto the camera 401 without being unable to be screwed due to the narrowband filter 403; at the same time, the imaging lens 402 will lock the narrowband filter 403 during the tightening process to ensure the relative stability among the imaging lens 402, the narrowband filter 403 and the camera 401.

[0036] As Figure 1 and Figure 2As shown in the figure, in this embodiment, the support module 200 adopts an electric rotary table. The electric rotary table can precisely control the uniform rotation of the neutron bubble detector 100, such as step-by-step rotation of 0°-360°, so that the bubbles at different depths inside the neutron bubble detector 100 can be captured by the imaging module 400 at multiple viewing angles; it can adapt to the adjustable rotation speed for different detection scenarios, such as low speed for high-precision static imaging and high speed for rapid screening, and can be flexibly adjusted according to the bubble density or detection requirements, taking into account the requirements of high-precision counting and high-throughput detection, and avoiding the efficiency bottleneck of traditional manual rotation; the electric rotary table can be hardware-synchronized and triggered with the camera 401 of the imaging module 400, and at a specific rotation angle (such as automatically taking pictures every 10°), the bubble position corresponds strictly to the rotation angle, avoiding image blurring caused by mechanical vibration or manual operation, and providing an accurate spatial coordinate reference for subsequent three-dimensional bubble distribution reconstruction; the electric rotary table is driven by a motor, without manual adjustment of the detector angle by humans, reducing operation errors, and thus improving the standardization and repeatability of the detection process. Optionally, the electric rotary table includes a base, a turntable rotatably disposed on the base, and a drive motor for driving the turntable to rotate; the sleeve seat 201 is installed on the turntable and rotates with the turntable. Optionally, the drive motor can drive the turntable to rotate by means of gear rotation, worm and worm gear transmission, or belt transmission, etc.

[0037] As Figure 1 and Figure 2 As shown in the figure, in this embodiment, the support module 200 includes: a sleeve seat 201, which is used for plugging and assembling and fixing with the neutron bubble detector 100, and exposing the material section of the neutron bubble detector 100; a driving device 202, which is used for driving the sleeve seat 201 to rotate circumferentially. The plugging and assembling structure of the sleeve seat 201 ensures automatic centering when the neutron bubble detector 100 is installed, avoiding position deviation caused by manual adjustment; the design of the exposed material section ensures that while fixing the neutron bubble detector 100, its bubble-containing gel section is completely exposed in the imaging light path without mechanical occlusion; the sleeve seat 201 locks the neutron bubble detector 100 through interference fit or elastic buckles, preventing axial movement or radial swing during rotation, ensuring the spatial position stability of the bubbles during imaging, and eliminating problems such as bubble image smear or ghosting caused by mechanical vibration; the driving device 202 is decoupled from the sleeve seat 201, allowing selection of motors with different torques / speeds such as stepper motors or servo motors according to detection requirements, adapting to various scenarios from high-precision slow scanning to rapid screening, and improving the expandability and adaptability of the device system. Optionally, it can also be upgraded to multi-axis linkage drive.

[0038] As Figure 1 and Figure 2As shown, in this embodiment, the driving device 202 adopts a driving motor, a servo motor or a steering gear. The driving motor (such as a DC brushed motor) adapts to different speed requirements through PWM speed regulation, and can achieve continuous and uniform rotation in the high-throughput screening mode, sacrificing part of the positioning accuracy in exchange for detection efficiency. The high-precision encoder feedback of the servo motor can achieve angle control at the 0.1° level, ensuring that each stop position of the neutron bubble detector 100 is accurately aligned with the imaging module 400 when rotating, avoiding the step loss error of the traditional stepper motor. The closed-loop control characteristic of the steering gear is suitable for scenarios that require fast start and stop (such as pausing and shooting every 30° rotation), reducing mechanical vibration during the acceleration and deceleration process. The self-locking gear set of the steering gear keeps the angle of the neutron bubble detector 100 fixed when powered off, preventing the collected data from being invalidated due to accidental displacement. By modularizing the selection of the driving device 202, the same support module 200 can adapt to detection requirements with different accuracies, speeds and costs, while retaining the hardware synchronization ability to ensure the imaging quality.

[0039] In this embodiment, multiple sets of sleeve seats 201 are provided. The multiple sets of sleeve seats 201 are arranged at intervals in the vertical direction perpendicular to the connection direction of the backlight module 300 and the imaging module 400. The multiple sets of sleeve seats 201 are linearly arranged in the vertical direction of the backlight-imaging optical path, so that multiple neutron bubble detectors 100 can be simultaneously in the position to be detected, the imaging position and the loading and unloading position, realizing pipeline-type continuous detection; or when multiple neutron bubble detectors 100 are within the field of view of the imaging module 400, batch imaging of multiple neutron bubble detectors 100 can also be realized simultaneously; the bubble counting of multiple neutron bubble detectors 100 can be completed within a single rotation and scan cycle, improving the detection efficiency. The sleeve seats 201 arranged at intervals are synchronously rotated through a linkage mechanism such as a synchronous pulley or a synchronous gear of the same driving device 202, or are controlled by independent motors to realize asynchronous operation, supporting the "rotation - pause - switch" working mode.

[0040] In this embodiment, the drive device 202 and the sleeve seat 201 are arranged in a one-to-one correspondence; or two adjacent sets of sleeve seats 201 are connected by a gear meshing structure, and one set of drive devices 202 drives one set of sleeve seats 201 to rotate so as to drive the other sleeve seats 201 to work in conjunction through the gear meshing structure; or two adjacent sets of sleeve seats 201 are connected by a synchronous belt structure, and one set of drive devices 202 drives one set of sleeve seats 201 to rotate so as to drive the other sleeve seats 201 to work in conjunction through the synchronous belt structure. Independent drive mode arranged in a one-to-one correspondence; each sleeve seat 201 is directly driven by a dedicated drive device 202, which can realize differentiated speed and steering control, such as adjacent neutron bubble detectors 100 respectively performing clockwise or counterclockwise rotation and shooting, which is suitable for high-precision scenes that require individual calibration; the failure of a single drive device 202 only affects the corresponding neutron bubble detector 100, and the system can automatically shield the station from continuing to operate, thereby improving the fault tolerance of the equipment. Gear meshing linkage mode, the rigid connection of the gear meshing structure ensures that the angle of all sleeve seats 201 is strictly synchronized with an error of <0.5°, avoiding the phase difference of multi-detector imaging caused by transmission slippage; the multi-stage gear set can amplify the output torque of the drive device 202, and adapt to large load scenarios such as heavy sleeve seats 201 that rotate multiple neutron bubble detectors 100 at the same time. Synchronous belt linkage mode, the elastic characteristics of the synchronous belt can absorb the impact vibration when the drive device 202 starts and stops, and reduce the risk of image blur caused by mechanical vibration of bubbles in the neutron bubble detector 100, which is particularly suitable for high-speed continuous shooting mode; the synchronous belt supports the arrangement of sleeve seats 201 with a larger span, and is more flexible than gear meshing to adapt to equipment racks of different sizes. Gear / synchronous belt linkage reduces the number of drive devices 202 used, reduces power consumption and heat generation, and is suitable for long-term continuous operation. The synchronous belt and gear set adopt a lubrication-free design to reduce maintenance complexity and avoid lubricant contamination of the neutron bubble detector 100. Optionally, the gear meshing structure has the same number of teeth, the same modulus, and the same transmission ratio between each gear, thereby ensuring that the rotation angles of each neutron bubble detector 100 remain consistent. Optionally, the gear meshing structure has different numbers of teeth, different modulus, and different transmission ratios between each gear, thereby achieving different rotation angles of each neutron bubble detector 100. Optionally, the synchronous belt structure has the same radial dimensions of each synchronous belt pulley, thereby achieving the same rotation angle of each neutron bubble detector 100. Optionally, the synchronous belt structure has different radial dimensions of each synchronous belt pulley, thereby achieving different rotation angles of each neutron bubble detector 100.

[0041] In this embodiment, the imaging module 400 and the sleeve base 201 are arranged in a one-to-one correspondence; alternatively, the sleeve bases 201 are all within the field of view of a group of imaging modules 400, and a group of imaging modules 400 are used to simultaneously capture images of the neutron bubble detectors 100 on multiple groups of sleeve bases 201. When the imaging module 400 and the sleeve base 201 are arranged in a one-to-one correspondence, each sleeve base 201 is equipped with a dedicated imaging module 400, which can independently adjust the focal length and exposure parameters according to the gel characteristics of different neutron bubble detectors 100, such as transparency and bubble density, avoiding the compromise of imaging quality caused by multiple detectors sharing a lens; ensuring that the bubble images of each detector reach the optimal signal-to-noise ratio; each imaging module 400 can be triggered asynchronously for shooting, adapting to the asymmetrically arranged sleeve bases 201 (such as staggered arrangement to avoid mechanical interference), realizing continuous detection without waiting; under the linkage rotation of the gear / synchronous belt, it can still shoot at different times as needed, avoiding image blurring caused by mechanical vibration transmission; the failure of a single imaging module 400 does not affect the operation of other units, and combined with the independent drive device 202, a completely decoupled detection unit is formed, improving the reliability of the system. A single group of imaging modules 400 covers multiple sleeve bases 201. By using a wide-angle lens or a high-resolution camera, multiple neutron bubble detectors 100 can be covered in a single shot, and the optical path is shared with the processing unit, significantly reducing the complexity and cost of the equipment; it is suitable for batch scenarios with low bubble density and uniform specifications of neutron bubble detectors 100, such as daily monitoring of nuclear power plants; multiple neutron bubble detectors 100 are imaged at the same time and under the same lighting conditions, eliminating the gray-scale differences caused by backlight fluctuations in time-sharing shooting, facilitating subsequent batch image processing; the counting results of multiple neutron bubble detectors 100 are directly comparable, suitable for horizontal statistical analysis; the space occupied by multiple groups of imaging modules 400 is saved, making the equipment layout more compact, such as in a vehicle-mounted mobile detection platform, while reducing the calibration and maintenance points of optical components.

[0042] In this embodiment, the backlight module 300 and / or the imaging module 400 are arranged on a slide rail, which is arranged along the connection direction of the backlight module 300 and the imaging module 400. The slide rail allows the imaging module 400 to finely adjust its position along the optical axis to compensate in real time for the defocus problem caused by the thickness tolerance of the neutron bubble detector 100 or the gel deformation, ensuring sharp imaging of the bubble edge and avoiding the blurred loss of the traditional fixed lens; the backlight module 300 adjusts the distance from the detector through the slide rail, dynamically adjusts the irradiation light intensity according to the gel turbidity following the inverse square law, and maintains sufficient signal-to-noise ratio in samples with low light transmittance. For neutron bubble detectors 100 with different diameters, the sliding imaging module 400 quickly adjusts the field of view coverage range in cooperation with the zoom lens, or moves the backlight module 300 to match the illumination area, and can adapt to multiple standards without replacing the hardware; it solves the cumbersome problem of the traditional equipment having to reinstall the optical path due to the size change of the neutron bubble detector 100. When replacing the neutron bubble detector 100 or cleaning the optical elements, slide the backlight module 300 and / or the imaging module 400 to the maintenance position to avoid mechanical wear or optical path deviation caused by frequent disassembly and assembly; the slide rail is reserved with interfaces to install auxiliary sensors such as laser rangefinders to calibrate the position or a second set of spare optical modules, supporting functional upgrades without affecting the main structure; fix the backlight module 300, and the imaging module 400 aligns with multiple sets of sleeve seats 201 in turn along the slide rail for circuit shooting, realizing the reuse of a single camera for multiple workstations. The backlight module 300 and the imaging module 400 slide synchronously to maintain the symmetry of the optical path, which is used for multi-angle transmission imaging of key samples to eliminate anisotropic occlusion. Through the automated optical path architecture, the traditional static imaging system is upgraded to an intelligent and adjustable flexible detection platform, providing underlying support for the accuracy, compatibility and functionality of bubble counting at the hardware level.

[0043] Matters not described in this utility model are well-known techniques.

[0044] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0045] The above-described embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the appended claims.

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A neutron bubble detector counting device, characterized in that include: A neutron bubble detector (100), used for forming bubbles matching the neutron radiation dose; A supporting module (200), used for carrying the neutron bubble detector (100) and controlling the circumferential rotation of the neutron bubble detector (100); A backlight module (300), used to provide a backlight source for the neutron bubble detector (100); An imaging module (400) is arranged opposite to the backlight module (300), and the neutron bubble detector (100) is located between the backlight module (300) and the imaging module (400), and is used for imaging the neutron bubble detector (100) to facilitate bubble counting.

2. The neutron bubble detector counting device according to claim 1, characterized in that The backlight module (300) adopts a narrow-band light source.

3. The neutron bubble detector counting device according to claim 1, characterized in that, The imaging module (400) comprises a camera (401), an imaging lens (402) and a narrow-band filter (403); The imaging lens (402) is arranged at the front end of the camera (401) and is coaxially arranged with a photosensitive element of the camera (401), and the narrow-band filter (403) is arranged at one end of the imaging lens (402) close to the camera (401).

4. The neutron bubble detector counting device according to claim 3, characterized in that, The narrowband filter (403) is provided with an annular base (4031) on its outer periphery, the annular base (4031) is provided with a hand-held portion (4032) on its side, the imaging lens (402) is provided with a plug interface (4021), the annular base (4031) is plugged into and assembled in the imaging lens (402) via the plug interface (4021) and the plug interface (4021) is covered by the hand-held portion (4032), thereby enabling the narrowband filter (403) to be installed in place in the imaging lens (402); or The narrowband filter (403) has an annular base (4031) on its outer periphery, and the annular base (4031) is connected to the inner thread of the imaging lens (402) via an outer thread.

5. The neutron bubble detector counting device according to any one of claims 1 to 4, characterized in that, The support module (200) adopts an electric rotating table.

6. The neutron bubble detector counting device according to any one of claims 1 to 4, characterized in that, The support module (200) comprises: A sleeve seat (201) is used for being plugged, assembled and fixed with the neutron bubble detector (100) and allowing the material section of the neutron bubble detector (100) to be exposed; The driving device (202) is used to drive the sleeve seat (201) to rotate in the circumferential direction.

7. The neutron bubble detector counting device according to claim 6, characterized in that, The driving device (202) is a driving motor, a servo motor or a steering gear.

8. The neutron bubble detector counting device according to claim 6, wherein The sleeve seats (201) are provided in a plurality of groups, and the plurality of groups of sleeve seats (201) are arranged at intervals in a direction perpendicular to the direction of the connection between the backlight module (300) and the imaging module (400).

9. The neutron bubble detector counting device according to claim 8, characterized in that, The driving device (202) and the sleeve seat (201) are arranged in a one-to-one correspondence; or Two adjacent groups of sleeve seats (201) are connected by a gear meshing structure, and one group of driving devices (202) drives one group of sleeve seats (201) to rotate so as to drive the other groups of sleeve seats (201) to rotate in conjunction with each other through the gear meshing structure; or Two adjacent groups of sleeve seats (201) are connected by a synchronous belt structure, and one group of driving devices (202) drives one group of sleeve seats (201) to rotate so as to drive the other groups of sleeve seats (201) to rotate in conjunction with each other through the synchronous belt structure.

10. The neutron bubble detector counting device according to claim 8, wherein The imaging modules (400) and the sleeve seats (201) are arranged in a one-to-one correspondence; or The sleeve seats (201) are all within the field of view of a group of imaging modules (400), and a group of imaging modules (400) is used to simultaneously photograph and image the neutron bubble detectors (100) on multiple groups of sleeve seats (201).

Images