Measuring method and measuring device

Abstract

The invention relates to the technical field of radioactive source cores, and provides a measurement method and a measurement device.The measurement scheme comprises the steps that an image of the radioactive source core is acquired through shooting equipment; obtaining the number of feature pixels corresponding to the feature side lines of the image; obtaining the length of the feature sideline based on the number of feature pixels and the length of a single pixel; and calculating the target volume of the radioactive source core according to the length of the characteristic side line. According to the measurement method provided by the embodiment of the invention, the security risk can be reduced, and the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of radiation source cores, and in particular to a measurement method and a measurement device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] The core of the radioactive source can convert the decay energy of radioactive isotopes into heat energy. The heating device made of the core of the radioactive source can heat instruments and equipment. The core of the radioactive source is usually made by high-temperature sintering after powder compaction. After forming, the volume needs to be measured, and the subsequent process operation can be carried out after meeting the process control requirements.

[0004] In the related art, in the process of measuring the volume of the core of a radiation source, the high temperature and strong radiation state of the core of the radiation source easily bring about greater safety risks and affect the measurement results. Summary of the invention

[0005] In view of this, the embodiments of the present application hope to provide a measurement method and a measurement device that can reduce safety risks and improve measurement accuracy.

[0006] A first aspect of an embodiment of the present application provides a measurement method for measuring a core of a radiation source, comprising:

[0007] Acquiring an image of the core of the radiation source by means of a photographing device;

[0008] Obtaining the number of characteristic pixels corresponding to the characteristic edge line of the image;

[0009] Acquire the length of the characteristic edge line based on the number of characteristic pixels and the length of a single pixel;

[0010] The target volume of the radiation source core is calculated according to the length of the characteristic edge line.

[0011] In some embodiments, before acquiring the image of the core of the radiation source by a photographing device, the measuring method includes:

[0012] Get the length of the standard edge of the standard sample;

[0013] Acquire a standard image of the standard sample by the photographing device, and acquire a standard number of pixels corresponding to the standard edge line based on the standard image;

[0014] The length of the single pixel is obtained based on the length of the standard edge line and the standard number of pixels.

[0015] In some embodiments, the image includes a side view of the core of the radiation source, and the characteristic edge line includes at least one edge line of the side view.

[0016] In some embodiments, the image includes a top view of the core of the radiation source, and the characteristic edge includes at least one diameter or edge of the top view.

[0017] In some embodiments, the measuring method comprises:

[0018] An error check is performed on the target volume.

[0019] In some embodiments, performing error detection on the target volume includes:

[0020] Acquire the contrast volume of the core of the radiation source based on three-dimensional measurement;

[0021] It is determined that the error between the target volume and the comparison volume is not greater than a preset value.

[0022] In some embodiments, the preset value is no greater than 3%.

[0023] A second aspect of an embodiment of the present application provides a measuring device, including:

[0024] The box body is formed with a hot chamber, and the radiation source core is arranged in the hot chamber;

[0025] A detection assembly, comprising a photographing device, wherein the photographing device is used to photograph an image of the core of the radiation source;

[0026] A control device is configured to execute the steps of any of the aforementioned measurement methods.

[0027] In some embodiments, the photographing device is disposed outside the box.

[0028] In some embodiments, the detection assembly includes a light guiding device having a light inlet and a light outlet, the light inlet and the light outlet are staggered, the light inlet faces the radiation source core, and the light outlet faces the shooting device.

[0029] In the measurement method provided by the embodiment of the present application, a photographing device photographs an image of the core of a radioactive source, obtains the length of a characteristic edge line by multiplying the number of characteristic pixels and a single pixel, and calculates the target volume of the core of the radioactive source based on the length of the characteristic edge line. On the one hand, the photographing device is spaced from the core of the radioactive source, which can not only prevent the core of the radioactive source from contacting the photographing device, causing damage to the core of the radioactive source, but also reduce the radiation dose transmitted to the photographing device, thereby improving the service life and operation stability of the photographing device. On the other hand, the operator can calculate the target volume of the core of the radioactive source without contacting or moving the core of the radioactive source, which can not only avoid wear and tear on the core of the radioactive source to a certain extent, but also provide better protection for the operator, thereby reducing safety risks. On the other hand, by obtaining the lengths of all characteristic edge lines, relatively comprehensive geometric information of the core of the radioactive source can be obtained, so as to calculate the target volume of the core of the radioactive source and improve the accuracy of the measurement method. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a measurement method provided in some embodiments of the present application;

[0031] Figure 2 A partial structural schematic diagram of a measuring device provided in some embodiments of the present application, wherein the dashed arrow exemplarily represents the optical path;

[0032] Figure 3 A schematic diagram of the structure of a radiation source core provided in some embodiments of the present application, wherein the radiation source core is a cylindrical structure;

[0033] Figure 4 This is a schematic structural diagram of a radiation source core provided in some embodiments of the present application, wherein the radiation source core is a combination structure of a cylinder and a frustum.

[0034] Description of Reference Numerals

[0035] Radioactive source core 1;

[0036] Box 2; Hot chamber 2a;

[0037] Detection component 3;

[0038] Photographic equipment 31;

[0039] Light guide device 32; light inlet 32a; light outlet 32b; lens barrel 321; light guide cavity 321a; light guide lens 322. DETAILED DESCRIPTION

[0040] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0041] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in this application are not described separately. The application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] In the related art, operators usually need to get close to the core of the radiation source and put a measuring device such as a vernier caliper in contact with the core of the radiation source to measure the volume of the core of the radiation source. The core of the radiation source is in a high temperature and strong radiation state, which, on the one hand, will affect the operators and pose a greater safety risk. On the other hand, the contact between the core of the radiation source and the measuring device will not only easily cause wear to the core of the radiation source, but also affect the service life and operational stability of the measuring device.

[0043] The embodiment of the present application provides a measurement method for measuring a radiation source core 1, the radiation source core 1 is used to convert the decay energy of a radioactive isotope into heat energy, and the radiation source core 1 can be used to make a heating device, etc. For example, please refer to Figure 3 and Figure 4 The core 1 of the radiation source is in the shape of at least one of a cylinder, a truncated cone, and a cone, or a combination of at least two of them.

[0044] See also Figure 1 , measurement methods include:

[0045] Step S10, acquiring an image of the core of the radiation source by means of a photographing device;

[0046] Exemplarily, the photographing device 31 is located on one side of the radiation source core 1 along the circumferential direction, and the photographing device 31 performs optical imaging on the radiation source core 1, thereby obtaining an image of the radiation source core 1. In other words, the photographing device 31 is spaced apart from the radiation source core 1, which can not only prevent the radiation source core 1 from contacting the photographing device 31, thereby preventing the radiation source core 1 from being damaged, but also reduce the radiation dose transmitted to the photographing device 31, thereby improving the service life and operation stability of the photographing device 31.

[0047] The specific type of the shooting device 31 is not limited, for example, it can be a CCD (Charge-coupled Device) camera, a CMOS (Complementary Metal-Oxide-Semiconductor) camera, or an electronic device equipped with a camera, etc.

[0048] Step S20, obtaining the number of characteristic pixels corresponding to the characteristic edge line of the image;

[0049] The characteristic edge line refers to the key lines such as the contour line and diameter of the image, and the characteristic edge line corresponds to the edge line of the radiation source core 1. The characteristic pixel number refers to the number of pixels contained in the characteristic edge line. Specifically, multiple characteristic edge lines of the image and the corresponding characteristic pixel numbers are obtained, that is, each characteristic edge line has a corresponding characteristic pixel number.

[0050] It should be noted that, in the present application, a plurality refers to a quantity including two or more.

[0051] Step S30, obtaining the length of the characteristic edge line based on the number of characteristic pixels and the length of a single pixel;

[0052] The length of a single pixel is known. That is, the product of the number of characteristic pixels and the length of a single pixel is equal to the length of the characteristic edge line, that is, the length of the edge line of the radiation source core 1. Specifically, the lengths of all characteristic edge lines are obtained. In this way, for a radiation source core 1 with a complex structure, such as a radiation source core 1 that is a combination of a cylinder and a truncated cone, the lengths of all characteristic edge lines of both the cylindrical part and the truncated cone part in the image can be obtained, thereby obtaining relatively comprehensive geometric information of the radiation source core 1 and improving the accuracy of the measurement method.

[0053] Step S40: Calculate the target volume of the core of the radiation source according to the length of the characteristic edge line.

[0054] For example, taking the radiation source core 1 as a cylindrical shape, the characteristic edge line at least includes the diameter of the top circular surface of the cylinder and / or the diameter of the bottom circular surface of the cylinder, and the edge line of the cylinder along the height direction. In this way, by calculating the product of the area of ​​the circular surface and the height of the cylinder, the result is the target volume of the radiation source core 1, which is convenient, fast and highly accurate.

[0055] In the measurement method provided by the embodiment of the present application, the shooting device 31 shoots the image of the radiation source core 1, obtains the length of the characteristic edge line by the product of the characteristic pixel number and the single pixel, and calculates the target volume of the radiation source core 1 based on the length of the characteristic edge line. On the one hand, the shooting device 31 is spaced from the radiation source core 1, which can not only avoid the radiation source core 1 from contacting the shooting device 31, resulting in damage to the radiation source core 1, but also reduce the radiation dose transmitted to the shooting device 31, thereby improving the service life and operation stability of the shooting device 31. On the other hand, the operator can calculate the target volume of the radiation source core 1 without contacting or moving the radiation source core 1, which can not only avoid wear and tear on the radiation source core 1 to a certain extent, but also play a good protective role for the operator, thereby reducing safety risks. On the other hand, by obtaining the lengths of all characteristic edge lines, relatively comprehensive geometric information of the radiation source core 1 can be obtained, so as to calculate the target volume of the radiation source core 1 and improve the accuracy of the measurement method.

[0056] It should be noted that the measurement method provided in the embodiment of the present application is based on photogrammetry to calculate the target volume of the radiation source core 1. Photogrammetry is a technology that uses image information to measure and reconstruct objects in three dimensions. Images of the object to be measured are taken from different angles, and the geometric information of the object is extracted, and the three-dimensional shape of the object is reconstructed based on the geometric information.

[0057] The basic principle of photogrammetry is to calculate the three-dimensional position of an object in space from the two-dimensional coordinates in the image through geometry and projection theory. This usually requires calibration of the shooting device 31 to obtain accurate internal and external parameters (such as focal length, optical center position and posture), and to locate different positions of the same object using images from multiple perspectives, thereby obtaining three-dimensional coordinates through triangulation. In addition, the three-dimensional model of the object can be reconstructed through steps such as point cloud generation, meshing and texture mapping.

[0058] In some embodiments, before acquiring the image of the radiation source core 1 by the photographing device 31, the measuring method includes:

[0059] Step S01, obtaining the length of the standard edge line of the standard sample;

[0060] The standard sample refers to a radiation source core 1 obtained by a standard design, and the radiation source core 1 has a relatively regular shape and good structural integrity. The standard sideline includes any sideline of the standard sample, that is, the length of the standard sideline is known.

[0061] Step S02: acquiring a standard image of the standard sample by the photographing device, and acquiring a standard number of pixels corresponding to the standard edge line based on the standard image;

[0062] The standard pixel number refers to the number of pixels included in the standard edge line. Exemplarily, the shooting device 31 is located in the circumference of the standard sample, and the shooting device 31 performs optical imaging on the standard sample to obtain a standard image of the standard sample, so that the number of pixels included in the standard edge line can be obtained, that is, the standard pixel number of the standard edge line is known.

[0063] Step S03: Acquire the length of the single pixel based on the length of the standard edge line and the standard number of pixels.

[0064] That is, the length of the standard edge divided by the number of standard pixels equals the length of a single pixel. It should be noted that, when the distance between the position where the standard sample is placed and the shooting device 31 remains unchanged, that is, the internal and external parameters of the shooting device 31 including the focal length, the position of the optical center and the posture remain unchanged, the length of a single pixel in the image of the radiation source core 1 of any shape obtained by the shooting device 31 remains unchanged.

[0065] Take the cylindrical standard sample as an example: the standard edge of the standard sample includes the diameter of the bottom circular surface of the cylinder, wherein the diameter of the bottom circular surface is 30 mm (millimeter). The standard sample is placed on the storage surface, and the distance between the storage surface and the shooting device 31 is 50 cm (centimeter). In the standard image, the number of standard pixels corresponding to the standard edge is 600, that is, when the standard sample is 50 cm away from the shooting device 31, the length of a single pixel is 0.05 mm. Furthermore, the radiation source core 1 to be tested is placed on the storage surface, and the shooting device 31 shoots the radiation source core 1. In the acquired image, the number of characteristic pixels corresponding to the characteristic edge is 720, that is, the length of the characteristic edge is 36 mm.

[0066] In this embodiment, the length of a single pixel is calculated using a standard sample, which can improve the measurement accuracy of the length of a single pixel, thereby improving the accuracy of the measurement method. By limiting the distance between the placement point and the shooting device 31, the placement point and the shooting device 31 do not need to be moved, so as to facilitate the shooting and measurement of multiple radiation source cores 1 of different shapes, reduce the operation steps, and further reduce the measurement error.

[0067] In some embodiments, the image includes a side view of the radiation source core 1 , and the characteristic edge line includes at least one side length of the side view.

[0068] Take the cylindrical core 1 of the radiation source as an example: Figure 3 , define the diameter of the bottom circular surface of the radiation source core 1 as R1, and the height of the radiation source core 1 as H, where R is less than H. The side view of the radiation source core 1 is a rectangle, and the characteristic edges include the long side and the short side of the rectangle, that is, the short side of the rectangle corresponds to the diameter of the bottom circular surface of the radiation source core 1, and the long side of the rectangle corresponds to the height of the radiation source core 1. By calculating the length of the long side and the length of the short side, the specific values ​​of R1 and H can be obtained. In this way, the target volume of the radiation source core 1 can be calculated as

[0069] It can be understood that for a radiation source core 1 with a centrally symmetrical structure, such as a cylindrical radiation source core 1, the lengths of two characteristic edges can be obtained only through a side view, thereby calculating the target volume of the radiation source core 1, which is convenient and quick, and improves measurement efficiency.

[0070] In some embodiments, the image includes a top view of the radiation source core 1 , and the characteristic edge line includes at least one diameter or side length of the top view.

[0071] Take the cylindrical radiation source core 1 as an example: Figure 3, define the diameter of the top circular surface of the radiation source core 1 as R2. The top view of the radiation source core 1 is circular, and the characteristic edge line includes the diameter of the circle, which corresponds to the diameter of the top circular surface of the radiation source core 1. By calculating the diameter of the circle, the specific value of R2 can be obtained. Further, by comparing the sizes of R1 and R2, if R1 is equal to R2, the radiation source core 1 is a standard cylindrical structure, and the target volume of the radiation source core 1 can be obtained by using the cylindrical volume calculation formula. If R1 is not equal to R2, the radiation source core 1 is not a cylindrical structure, for example, it can be an elliptical column, etc.

[0072] In this embodiment, on the one hand, the side view and the top view can be used to determine whether the radiation source core 1 is a centrosymmetric structure, so as to calculate the target volume of the radiation source core 1 and prepare components for loading the radiation source core 1. On the other hand, in the case where the radiation source core 1 is a non-centrosymmetric structure, the three-dimensional shape of the radiation source core 1 can be obtained through the side view and the top view, so as to calculate the target volume of the radiation source core 1 and improve the versatility of the measurement method.

[0073] In some embodiments, the measuring method comprises:

[0074] Step S50: performing error detection on the target volume.

[0075] Through error detection, not only can the errors in the calculation process be identified and corrected to improve the accuracy of the measurement method, but also the structural shape of the radiation source core 1 can be optimized, which helps to maintain product quality and reduce the defective rate.

[0076] In some embodiments, performing error detection on the target volume includes:

[0077] Step S51, obtaining the contrast volume of the core of the radiation source based on three-dimensional measurement;

[0078] Exemplarily, the contrast volume of the radiation source core 1 obtained by structured light 3D measurement technology. Structured light 3D measurement technology is a non-contact 3D measurement method that projects specific light patterns (such as laser stripes, Gray code, sinusoidal stripes, etc.) onto the outer surface of the radiation source core 1 and analyzes the reflected light of these patterns to obtain the 3D morphology information of the object surface.

[0079] Step S52: Determine whether the error between the target volume and the comparison volume is not greater than a preset value.

[0080] Specifically, when the error between the target volume and the comparison volume is less than a preset value, it is determined that the measurement result meets the error requirement, and the target volume can be used to characterize the actual volume of the radiation source core 1. When the error between the target volume and the comparison volume is greater than or equal to the preset value, it is determined that the measurement result does not meet the error requirement, and the target volume cannot be used to characterize the actual volume of the radiation source core 1.

[0081] In one embodiment, the measurement method includes a calibration step, through which, for example, the focus and posture of the photographing device 31 are adjusted, and the above steps of the measurement method are repeated until the error between the target volume and the comparison volume is no greater than a preset value.

[0082] In some embodiments, the preset value is no greater than 3%.

[0083] Exemplarily, the preset value may be 1%, 1.5%, 2%, 2.5% or 3%, etc. By setting a suitable preset value, both the accuracy of the measurement method and the reliability of product quality can be taken into account.

[0084] The following is a further description of the measurement method provided in the embodiment of the present application in conjunction with a specific embodiment:

[0085] The standard sample is cylindrical, and the standard sideline of the standard sample is 12 mm. The standard sample is photographed by the photographing device 31 to obtain a standard image. It is measured that the standard sideline contains 360 pixels, that is, the length of a single pixel is 0.033 mm.

[0086] See also Figure 4 , the radiation source core 1 is a combination structure of a cylinder and a truncated cone. It should be noted that the radiation source core 1 is a centrally symmetrical structure. The shooting device 31 shoots a side view of the radiation source core 1, wherein the long side and the short side of the rectangle correspond to the diameter and the height of the cylinder, respectively, and the height of the trapezoidal part corresponds to the height of the truncated cone. It is measured that the long side and the wide side of the rectangle contain 720 pixels and 480 pixels, respectively, that is, the diameter of the cylinder is 24 mm, and the height of the cylinder is 16 mm. It is measured that there are 60 pixels between the upper base and the lower base of the trapezoid, that is, the height of the truncated cone is 2 mm.

[0087] Please continue reading Figure 4 , the photographing device 31 photographs the top view of the radiation source core 1. It can be understood that the image in the top view is three concentric circles, wherein the three concentric circles correspond to the diameter of the cylinder, the diameter of the bottom circle of the truncated cone, and the diameter of the top circle of the truncated cone from the outside to the inside. It is measured that the diameter of the outermost circle contains 720 pixels, the diameter of the middle circle contains 655 pixels, and the diameter of the innermost circle contains 582 pixels, that is, the diameter of the cylinder is 24 mm, the diameter of the lower bottom of the truncated cone is 21.6 mm, and the diameter of the upper bottom of the truncated cone is 19.2 mm.

[0088] Substituting all the values ​​into the volume calculation formula of the cylinder and the truncated cone, we can get the target volume of the radiation source core 1 to be 7892.69mm 3 (cubic millimeters). The comparative volume of the radiation source core 1 was measured by three-dimensional measurement to be 7816.37 mm 3 , the error between the target volume and the comparison volume is 0.96%, which is smaller than the preset value and meets the error requirement.

[0089] See also Figure 2 The embodiment of the present application also provides a measuring device, including a housing 2, a detection assembly 3 and a control device, wherein the housing 2 forms a hot chamber 2a, and the radiation source core 1 is arranged in the hot chamber 2a; the detection assembly 3 includes a shooting device 31, and the shooting device 31 is used to shoot an image of the radiation source core 1; the control device is configured to execute the steps of the measuring method in any embodiment of the present application.

[0090] The heat chamber 2a is not connected to the outside air, and the heat chamber 2a is a closed cavity. The heat chamber 2a is used to block or weaken the heat and radiation generated by the radiation source core 1, and plays a better protective role for the operator. Exemplarily, the box 2 can be made of radiation-resistant materials, for example, the side walls of the box 2 include boron structures and lead structures, so that the radiation generated by the radiation source core 1 can be prevented from penetrating the side walls of the box 2 as much as possible.

[0091] The control device includes but is not limited to a personal digital terminal or a computer, etc. Exemplarily, the control device is electrically connected to the shooting device 31, and the control device can obtain the image shot by the shooting device 31, and obtain the number of characteristic pixels and the length of the characteristic edge line to calculate the target volume.

[0092] In one embodiment, the measuring device includes a placement table, which is arranged in the hot chamber 2a. The radiation source core 1 is placed on the placement table. By changing the distance between the shooting device 31 and the placement table, the distance between the shooting device 31 and the radiation source core 1 is adjusted, which is convenient to operate.

[0093] In one embodiment, a visual window is formed in the box 2. Exemplarily, the visual window is formed on the opposite side of the box 2 where the storage table is connected, so that the storage table can avoid blocking the field of vision, so that the operator can observe the radiation source core 1.

[0094] For some examples, see Figure 2 , the photographing device 31 is arranged outside the box 2. That is to say, the photographing device 31 and the radiation source core 1 are separated by the box 2, so that the box 2 can shield at least part of the radiation emitted by the radiation source core 1 to reduce the radiation dose transmitted to the photographing device 31. In this way, not only the measurement accuracy of the measuring device can be improved, but also the service life and operation stability of the photographing device 31 can be improved.

[0095] In one embodiment, the control device is disposed outside the box 2 .

[0096] For some examples, see Figure 2 The detection assembly 3 includes a light guiding device 32, which has a light inlet 32a and a light outlet 32b. The light inlet 32a and the light outlet 32b are staggered, the light inlet 32a faces the radiation source core 1, and the light outlet 32b faces the shooting device 31.

[0097] Exemplarily, the visible light generated by the radiation source core 1 or the structured light reflected by the radiation source core 1 enters the light guide device 32 through the light inlet 32a, and enters the shooting device 31 through the light outlet 32b. The shooting device 31 receives the light signal and transmits it to the control device to generate an image of the radiation source core 1. In this way, the shooting accuracy of the shooting device 31 can be taken into consideration while ensuring the service life and operation stability of the shooting device 31.

[0098] It should be noted that the radiation emitted by the radiation source core 1 is usually propagated in a straight line. The light inlet 32a and the light outlet 32b are misaligned, that is, the light and the radiation enter the light guide device 32 and propagate along a non-straight line. The light guide device 32 can block the radiation, so that the radiation emitted by the radiation source core 1 is difficult to penetrate the light guide device 32 and enter the shooting device 31, thereby improving the service life and operation stability of the shooting device 31.

[0099] In one embodiment, the box body 2 is formed with an operation port, and the measuring device includes a glove disposed at the operation port. The light inlet 32a is higher than the light outlet 32b, and the light inlet 32a and the operation port are approximately located in the same plane. In other words, the glove and the photographing device 31 are misaligned, so that the operator's hand passes through the operation port and is sheathed in the glove, and observes the radiation source core 1 through the visual window, thereby facilitating the operation of the radiation source core 1 or other components in the hot chamber 2a, and at the same time will not interfere with the operator's photographing of the radiation source core 1 through the photographing device 31, which is highly safe and convenient to operate.

[0100] In some embodiments, there are two light guide devices 32, one of which is disposed on the top wall of the box body 2, and the other is disposed on the side wall of the box body 2. In this way, the two photographing devices 31 can be placed at the light outlets 32b of the two light guide devices 32, respectively, so that the side view and the top view of the radiation source core 1 can be photographed at the same time, thereby improving the working efficiency.

[0101] For some examples, see Figure 2The light guide device 32 includes a lens barrel 321 and a plurality of light guide lenses 322. The lens barrel 321 penetrates the side wall of the box body 2. The lens barrel 321 forms a light guide cavity 321a and a light inlet 32a and a light outlet 32b connected to the light guide cavity 321a. The light guide lenses 322 are used to reflect light. The plurality of light guide lenses 322 are arranged at least at one of the light inlet 32a and the light outlet 32b. In other words, the light guide cavity 321a is bent and extended, and the light guide device 32 can be regarded as a periscope structure. The rays emitted by the radiation source core 1 are all propagated along a non-straight line in the light guide cavity 321a, which prevents the rays from propagating in a straight line to the shooting device 31, reduces the radiation dose transmitted to the shooting device 31 as much as possible, and improves the service life and operation stability of the shooting device 31.

[0102] For some examples, see Figure 2 There are four light guide lenses 322, two light guide lenses 322 form a group, and the two groups of light guide lenses 322 are respectively arranged at the light inlet 32a and the light outlet 32b. In other words, the visible light generated by the radiation source core 1 or the structured light reflected by the radiation source core 1 enters the shooting device 31 after four reflections.

[0103] In the description of this specification, the description with reference to the terms "an embodiment", "some embodiments" and "exemplary" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0104] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction. The above description is only a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, this application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A measurement method, characterized in that: Used to measure the core of radioactive sources, including: Acquiring an image of the core of the radiation source by means of a photographing device; Obtaining the number of characteristic pixels corresponding to the characteristic edge line of the image; Acquire the length of the characteristic edge line based on the number of characteristic pixels and the length of a single pixel; The target volume of the radiation source core is calculated according to the length of the characteristic edge line.

2. The measuring method according to claim 1, characterized in that: Before acquiring the image of the core of the radiation source by a photographing device, the measuring method comprises: Get the length of the standard edge of the standard sample; Acquire a standard image of the standard sample by the photographing device, and acquire a standard number of pixels corresponding to the standard edge line based on the standard image; The length of the single pixel is obtained based on the length of the standard edge line and the standard number of pixels.

3. The measuring method according to claim 1, characterized in that: The image includes a side view of the core of the radiation source, and the characteristic edge line includes at least one edge line of the side view.

4. The measuring method according to claim 1, characterized in that: The image includes a top view of the core of the radiation source, and the characteristic edge includes at least one diameter or edge of the top view.

5. The measuring method according to claim 1, characterized in that: The measuring method comprises: An error check is performed on the target volume.

6. The measuring method according to claim 5, characterized in that: Performing error detection on the target volume includes: Acquire the contrast volume of the core of the radiation source based on three-dimensional measurement; It is determined that the error between the target volume and the comparison volume is not greater than a preset value.

7. The measuring method according to claim 6, characterized in that: The preset value is no greater than 3%.

8. A measuring device, characterized in that: include: The box body is formed with a hot chamber, and the radiation source core is arranged in the hot chamber; A detection assembly, comprising a photographing device, wherein the photographing device is used to photograph an image of the core of the radiation source; A control device configured to execute the steps of the measurement method according to any one of claims 1 to 7.

9. The measuring device according to claim 8, characterized in that The shooting device is arranged outside the box.

10. The measuring device according to claim 8, characterized in that The detection component includes a light guiding device, which has a light inlet and a light outlet. The light inlet and the light outlet are staggered, the light inlet faces the radiation source core, and the light outlet faces the shooting device.

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