Method and Device for Obtaining Inclusion Position

Abstract

The present invention relates to the field of materials science, and particularly to a method and device for obtaining the position of inclusions. The method includes: emitting a neutron beam to the first surface of an object to be detected; receiving gamma rays in each observation area through a gamma detection unit to obtain an observation energy spectrum corresponding to each of the observation areas; wherein the observation energy spectrum includes the number of rays at each energy level; the other surface of the object to be detected is pre-divided into a plurality of observation areas; judging whether there are inclusions in the object to be detected according to the number of rays in the observation energy spectrum and the number of rays in a preset first energy spectrum, and confirming the position of the inclusions when there are inclusions; wherein the first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam. By measuring the energy spectrum of gamma rays and calculating the position of inclusions, the detection speed is greatly improved and the labor cost is significantly reduced.

Description

Technical Field

[0001] The present invention relates to the field of materials science, and particularly to a method and device for obtaining the position of inclusions. Background Art

[0002] Metal recycling aims to reduce the impact on the environment and improve the efficiency of resource utilization. Metals can be recycled and reused infinitely, and their physical properties do not decay during this process. However, various inclusions, such as impurity metals, may exist in the recycled metals, and these inclusions may seriously affect the quality and performance of the metals. In the process of metal recycling, it is crucial to detect and remove these inclusions.

[0003] In traditional metal recycling, the inclusion detection method mainly relies on manual disassembly and inspection. This process is time-consuming and labor-intensive, seriously increasing the labor cost. Moreover, in large-scale recycling operations, the speed and efficiency of manual detection are difficult to meet the requirements. Summary of the Invention

[0004] To solve the above problems, the present invention provides a method and device for obtaining the position of inclusions.

[0005] The first aspect of the present invention discloses a method for obtaining the position of inclusions, including:

[0006] Emitting a neutron beam towards the first surface of the object to be detected;

[0007] Receiving gamma rays in each observation area through a gamma detection unit to obtain an observation energy spectrum corresponding to each said observation area; wherein, the observation energy spectrum includes the number of rays at each energy level; the other surfaces of the object to be detected are pre-divided into several observation areas;

[0008] Judging whether there are inclusions in the object to be detected according to the number of rays in the observation energy spectrum and the number of rays in a preset first energy spectrum, and confirming the position of the inclusions when there are inclusions; wherein, the first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0009] The second aspect of the present invention discloses a device for obtaining the position of inclusions, including:

[0010] A neutron generation unit for emitting a neutron beam towards the first surface of the object to be detected;

[0011] A gamma detection unit for receiving gamma rays passing through each observation area to obtain an observation energy spectrum corresponding to each said observation area, wherein, the observation energy spectrum includes the number of rays at each energy level; the other surfaces of the object to be detected are pre-divided into several observation areas;

[0012] A control unit, configured to determine whether there is an inclusion in the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and confirm the position of the inclusion when there is an inclusion; wherein, the first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0013] In the present invention, a neutron beam is emitted to the object to be detected, and then a gamma detection unit arranged around the object to be detected receives gamma rays passing through the observation area. By measuring the energy spectrum of the gamma rays, the position of the inclusion is calculated, greatly improving the detection speed and significantly reducing the labor cost, thereby making the recycling process of the object to be detected more economical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 is a structural diagram of a device for obtaining the position of an inclusion disclosed in an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of an observed energy spectrum disclosed in an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the position of the gamma detection unit disclosed in an embodiment of the present invention;

[0018] Figure 4 is a flowchart of a method for obtaining the position of an inclusion disclosed in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description, claims, and above-mentioned drawings of the present invention, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, or product end that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, devices, or product ends.

[0021] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] The object to be detected in the present invention can be metal, polymer, or any substance containing abundant atomic nuclei and capable of effectively interacting with neutrons and gamma rays. For example, steel, plastic, boron, etc. In the embodiments of the present invention, steel in metal is taken as an example to explain the specific implementation method of the present invention.

[0023] The detection of inclusions in steel has always been an important topic and technical difficulty in the field of material processing. The existence of inclusions will seriously affect the mechanical properties, processing performance, and service life of steel. Therefore, accurately and efficiently detecting inclusions is crucial for ensuring the quality and reliability of steel products. However, traditional inclusion detection methods mainly rely on manual detection and often have limitations such as low detection efficiency. The present invention realizes non-destructive and rapid detection of inclusions by analyzing the gamma rays generated by the interaction between neutrons and inclusions, thereby greatly improving the detection efficiency and accuracy, reducing the detection cost, and providing strong technical support for steel quality control.

[0024] Please refer to Figure 1 as shown Figure 1 is a structural diagram of a device for obtaining the position of inclusions disclosed in an embodiment of the present invention. As Figure 1 shown, the device for obtaining the position of inclusions includes:

[0025] A neutron generation unit for emitting a neutron beam towards the first surface of the object to be detected;

[0026] A gamma detection unit for receiving gamma rays passing through each observation area and obtaining an observation energy spectrum corresponding to each said observation area, wherein the observation energy spectrum includes the number of rays at each energy level; the other surface of the object to be detected is pre-divided into a plurality of observation areas;

[0027] A control unit, which is configured to determine whether there is an inclusion in the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and confirm the position of the inclusion when there is an inclusion; wherein, the first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0028] In this optional embodiment, the neutron generating unit can generate and emit a neutron beam. The neutron generating unit in this embodiment can be a spontaneous fission source (such as a plutonium-Becquerel source), or a neutron generator (such as an Osherov tube and an accelerator-driven system), and the embodiments of the present invention are not limited thereto.

[0029] The spontaneous fission source uses the spontaneous fission phenomenon of certain radioactive isotopes (such as plutonium-239) to generate neutrons. The advantages of these spontaneous fission sources are simple structure and no external power supply required, but the neutron current intensity is relatively low.

[0030] The neutron generator can generate a higher-intensity neutron current. Among them, the Osherov tube is a common neutron generator, which uses high voltage to accelerate deuterium ions to make them undergo a fusion reaction with deuterium or tritium nuclei in the target material, thereby generating neutrons. The accelerator-driven system uses a high-energy proton beam generated by a particle accelerator to bombard a heavy element target and generates neutrons using side effects.

[0031] In this optional embodiment, the neutron generating unit is configured to emit a neutron beam to the first surface of the steel, and the type of the neutron generating unit is not limited.

[0032] The type of the gamma detection unit is not limited, and for example, a scintillation detector, a semiconductor detector, etc. can be used. The scintillation detector uses the property that certain substances will generate visible light or ultraviolet light when irradiated by gamma rays, and measures the intensity of gamma rays by measuring the intensity of these lights. These substances are called scintillators, and common ones are sodium iodide and plastic scintillators. The semiconductor detector uses the property that semiconductor materials will generate charge carriers when irradiated by gamma rays, and measures the intensity of gamma rays by measuring the number of charge carriers. Common semiconductor detector materials are germanium and silicon.

[0033] The observed energy spectrum is a chart describing the energy distribution of gamma rays, Figure 2 showing an observed energy spectrum, Figure 2 where the abscissa represents the energy level and its unit is mega electron volts (Mev, Mega electron Volt), and the ordinate represents the normalized number of rays at the corresponding energy level, with the unit of "pieces". Figure 2 The observed energy spectra of the steel are respectively shown by four curves of different colors when the inclusions are iron, silica with a content of 10%, silica with a content of 20%, and silica with a content of 50%.

[0034] In this optional embodiment, the standard target object does not contain inclusions and has the same shape and size as the object to be detected. Taking steel as an example, the standard target object is steel that does not include impurities.

[0035] In an optional embodiment, the device for obtaining the location of inclusions further includes:

[0036] A storage unit, used for storing the first energy spectrum and / or the fitted energy spectrum;

[0037] The fitted energy spectrum is an energy spectrum obtained when the sample target object is irradiated by a neutron beam when the inclusion is at a specified position in the sample target object.

[0038] In an optional embodiment, there are multiple gamma detection units, and at least one gamma detection unit is arranged corresponding to one observation area.

[0039] Figure 3 A schematic diagram showing the location of the gamma detection unit, Figure 3 Here, (1) represents the neutron generation unit, (2) represents the observation area, (3) represents the gamma detection unit, and (4) represents the inclusions. Figure 3 The left side is a front view of the acquisition device at one inclusion location, and the right side is a top view of the acquisition device at another inclusion location. Figure 3 In the figure, numbers 1 to 12 correspond to an observation area respectively, and letters A to K represent a gamma detection unit respectively. In the top view on the right, the gamma detection unit G and the gamma detection unit J of the inclusion position acquisition device correspond to the same observation area 11, as shown in FIG. Figure 3 As shown in the left figure, the observation area 5 corresponding to the gamma detection unit A of the device for acquiring the position of the inclusions is only provided with the gamma detection unit A.

[0040] In an optional embodiment, the acquisition device further includes:

[0041] A first moving unit, used for moving the gamma detection unit;

[0042] And, the control unit is further used to control the gamma detection unit to move around the object to be detected along a first trajectory through the first moving unit, so that the gamma detection unit passes through all the observation areas;

[0043] The gamma detection unit is used to receive corresponding gamma rays when passing through the observation area to obtain a corresponding observation energy spectrum.

[0044] It can be seen that this optional embodiment moves the gamma detection unit by the first mobile unit, so that the gamma detection unit can pass through all the observation areas of the object to be detected in turn, obtain the observation energy spectrum corresponding to each observation area, reduce the number of required gamma detection units, and reduce equipment cost and complexity.

[0045] In an optional embodiment, the first track may be adaptively adjusted according to the shape and size of the object to be detected.

[0046] In an optional embodiment, the acquisition device further includes:

[0047] A second moving unit, used to move the object to be detected;

[0048] And, the control unit is further used to control the object to be detected to move around the gamma detection unit along a second trajectory through the second moving unit, so that all the observation areas of the object to be detected pass through the gamma detection unit;

[0049] The gamma detection unit is used to receive corresponding gamma rays and obtain corresponding observation energy spectrum after the observation area of ​​the object to be detected is moved into position.

[0050] It can be seen that this optional embodiment moves the object to be detected by the second mobile unit so that all the observation areas of the object to be detected can pass through the fixed gamma detection unit, which is another effective solution to achieve full coverage detection. This optional embodiment keeps the gamma detection unit stationary and realizes the collection of observation energy spectra of different observation areas by moving the object to be detected. The fixed gamma detection unit is simpler and firmer to install, which reduces mechanical vibration and position error caused by movement, is conducive to improving the stability and reliability of the observed energy spectrum data, reduces the number of gamma detection units required, and reduces equipment cost and complexity.

[0051] like Figure 4 As shown, Figure 4 is a flow chart of a method for obtaining the position of an inclusion disclosed in an embodiment of the present invention. The method for obtaining the position of an inclusion uses any of the devices for obtaining the position of an inclusion described in the above embodiments, such as Figure 4 As shown, the method may include:

[0052] S401, emitting a neutron beam toward a first surface of an object to be detected;

[0053] A neutron beam is a particle stream composed of a large number of neutrons. A neutron is a particle in the atomic nucleus, without charge, and its mass is similar to that of a proton. Due to the lack of charge, neutrons can easily penetrate the atomic electron cloud and directly interact with the atomic nucleus. Compared with some other detection methods (such as metallographic cutting), neutron irradiation is a non-destructive detection method. The neutron beam will not damage the steel or affect its properties, so it is suitable for on-line detection on the production line.

[0054] The steel matrix is mainly composed of iron elements, while inclusions usually contain elements such as oxygen, sulfur, silicon, and manganese. The interaction cross-sections (reaction probabilities) of neutrons with different elements are different. By neutron energy, gamma rays of inclusion elements can be highlighted, so as to distinguish inclusions from steel.

[0055] S402. Receive gamma rays from each observation area through the gamma detection unit to obtain the observation energy spectrum corresponding to each said observation area; wherein, the said observation energy spectrum includes the number of rays at each energy level; the other surfaces of the object to be detected are pre-divided into several observation areas;

[0056] The generation of gamma rays is closely related to the position of inclusions. When the neutron beam irradiates the steel, neutrons will interact with the elements in the inclusions, excite the atomic nucleus, and make it release characteristic gamma rays. These gamma rays are emitted in all directions from the position where the inclusions are located, carrying the spatial information of the inclusions.

[0057] When gamma rays propagate in the steel, they will gradually attenuate with the increase of distance. The closer the gamma detection unit is to the inclusion, the higher the intensity of the gamma rays received. By comparing the number of rays of gamma detection units at different positions, the relative distance between the inclusion and the gamma detection unit can be estimated.

[0058] In an optional embodiment, the step of receiving gamma rays from each observation area through the gamma detection unit to obtain the observation energy spectrum corresponding to each said observation area includes:

[0059] Set at least one of the said gamma detection units corresponding to each said observation area;

[0060] Receive the corresponding gamma rays through the gamma detection units set in different observation areas, so as to obtain the observation energy spectrum corresponding to each said observation area.

[0061] It can be seen that in this optional embodiment, by independently configuring gamma detection units for each observation area, full coverage and parallel detection of the surface of the object to be detected are achieved. Data from different observation areas can be collected simultaneously, greatly improving the detection efficiency and speed. In addition, the independent gamma detection units are conducive to modular and standardized design, facilitating the assembly, maintenance, and upgrade of the detection system. Once a gamma detection unit in a certain observation area fails, it can be replaced or repaired individually, improving the maintainability and reliability of the system.

[0062] In an optional embodiment, the steps of receiving gamma rays from each observation area by the gamma detection unit to obtain the observation energy spectrum corresponding to each said observation area include:

[0063] Controlling the gamma detection unit to move around the object to be detected along a preset first trajectory until the gamma detection unit passes through all the said observation areas;

[0064] For each said observation area, when the gamma detection unit passes through the observation area, receiving the corresponding gamma rays to obtain the corresponding observation energy spectrum.

[0065] It can be seen that in this optional embodiment, by moving the gamma detection unit to cover all the said observation areas, the system structure is simplified, and the number and cost of gamma detection units are reduced. At the same time, the centralized gamma detection unit is convenient for precise control and synchronization, ensuring the consistency and comparability of data collection.

[0066] In an optional embodiment, the steps of receiving gamma rays from each observation area by the gamma detection unit to obtain the observation energy spectrum corresponding to each said observation area include:

[0067] Controlling the object to be detected to move around the gamma detection unit along a preset second trajectory until all the said observation areas of the object to be detected pass through the gamma detection unit;

[0068] For each said observation area, when the observation area of the object to be detected moves to the position of the gamma detection unit, receiving the corresponding gamma rays through the gamma detection unit to obtain the corresponding observation energy spectrum.

[0069] It can be seen that in this optional embodiment, the acquisition of the observation energy spectrum of different observation areas is achieved by moving the object to be detected. The fixed gamma detection unit does not need to consider the influence of factors such as mechanical vibration and position offset during the movement, ensuring the stability of the performance of the gamma detection unit and the reliability of data collection. The gamma detection unit after precise calibration can continuously provide high-quality observation energy spectra, reducing the measurement errors caused by movement.

[0070] S403. Determine whether there are inclusions in the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and confirm the position of the inclusions when there are inclusions; wherein, the first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0071] In an optional embodiment, the steps of determining whether there are inclusions in the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in the preset first energy spectrum, and confirming the position of the inclusions when there are inclusions include:

[0072] For each observation area:

[0073] Compare the observed energy spectrum corresponding to the observation area with the first energy spectrum:

[0074] If, at an energy level, the difference between the number of rays in the observed energy spectrum and the number of rays in the first energy spectrum is greater than a preset first threshold, then there are inclusions in the object to be detected within the range of the observation area, and calculate the position of the inclusions based on the corresponding observed energy spectrum;

[0075] If not, then there are no inclusions in the object to be detected within the range of the observation area.

[0076] In this optional embodiment, by setting the first threshold, the probability of misjudgment caused by measurement errors can be reduced.

[0077] It can be seen that in this optional embodiment, by comparing the observed energy spectrum corresponding to the observation area with the preset first energy spectrum, it is possible to intuitively determine whether the object to be detected contains inclusions, which is simple and intuitive, easy to implement, and can accurately judge whether there are inclusions in the object to be detected within the range of the observation area.

[0078] In an optional embodiment, the steps of calculating the position of the inclusions based on the corresponding observed energy spectrum include:

[0079] Based on a pre-constructed position-energy level relationship function, calculate the predicted positions of the inclusions at each energy level according to the number of rays corresponding to each energy level in the observed energy spectrum, wherein each position-energy level relationship function corresponds to one of the energy levels, and the position-energy level relationship function describes the relationship between the position of the inclusions and the number of rays at its corresponding energy level;

[0080] Take the average value of the predicted positions corresponding to all the energy levels to obtain the position of the inclusions within the range of the object to be detected in the observation area.

[0081] In an optional embodiment, the position energy level relationship function is constructed according to the following method:

[0082] Obtain the fitting energy spectra of multiple sample target objects with inclusions; wherein, the multiple sample target objects are of the same size, the positions of the inclusions in each sample target object are different, and the inclusions in each sample target object are set at different specified positions within the corresponding range of the observation area;

[0083] Count the number of rays corresponding to each energy level in all the fitting energy spectra;

[0084] For each energy level:

[0085] According to the number of rays corresponding to it in all the fitting energy spectra, use a fitting algorithm to obtain the corresponding position energy level relationship function.

[0086] The fitting algorithm is a mathematical method used to find the best curve or function in a given set of data points to make it as close as possible to the original data. The purpose of the fitting algorithm is to find a mathematical model that can well describe or predict the trend and law of the data. The fitting algorithm in this embodiment can select linear regression, polynomial regression, spline regression, etc. according to the characteristics of the data.

[0087] For example: among the pre-prepared data, there are a first fitting energy spectrum, a second fitting energy spectrum, and a third fitting energy spectrum. The first fitting energy spectrum corresponds to the inclusion at the first coordinate, and the number of rays at the first energy level in the first fitting energy spectrum is the first number; the second fitting energy spectrum corresponds to the inclusion at the second coordinate, and the number of rays at the first energy level in the second fitting energy spectrum is the second number; the third fitting energy spectrum corresponds to the inclusion at the third coordinate, and the number of rays at the first energy level in the third fitting energy spectrum is the third number.

[0088] For the first energy level, take the first coordinate, the first number, the second coordinate, the second number, the third coordinate, and the third number as the input of the fitting algorithm to obtain the position energy level relationship function corresponding to the first energy level. The input of this function is the energy number, and the output is the coordinate of the inclusion.

[0089] In summary, a method and device for obtaining the position of inclusions disclosed by the present invention greatly improve the detection speed and significantly reduce the labor cost. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0090] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A method for obtaining the location of inclusions, characterized in that: The method for obtaining the location of the inclusions includes: emitting a neutron beam toward a first surface of an object to be inspected; The gamma rays of each observation area are received by a gamma detection unit to obtain an observation energy spectrum corresponding to each observation area; wherein the observation energy spectrum includes the number of rays at each energy level; the other surface of the object to be detected is pre-divided into a number of observation areas; According to the number of rays in the observed energy spectrum and the number of rays in the preset first energy spectrum, it is judged whether there are inclusions in each observation area of ​​the object to be detected, and when inclusions exist, the position of the inclusions is calculated based on a pre-constructed position-energy-level relationship function; wherein the first energy spectrum is an energy spectrum obtained after neutron beam irradiation of a standard target object, each position-energy-level relationship function corresponds to one energy level, and the position-energy-level relationship function describes the relationship between the position of the inclusion and the number of rays at the corresponding energy level; The steps of calculating the position of inclusions based on the pre-built position energy level relationship function include: Based on a pre-constructed position-energy-level relationship function, the predicted position of inclusions at each energy level is calculated according to the number of rays corresponding to each energy level in the observed energy spectrum; Taking the average of the predicted positions corresponding to all the energy levels, obtaining the position of the inclusion within the range of the object to be detected within the observation area; And, the position energy level relationship function is constructed according to the following method: Obtaining fitted energy spectra of a plurality of sample target objects with inclusions; wherein the plurality of sample target objects have the same size, the positions of the inclusions in each of the sample target objects are different, and the inclusions in each of the sample target objects are arranged at different designated positions within the corresponding range of the observation area; Counting the number of the rays corresponding to each of the energy levels in all the fitted energy spectra; For each of the energy levels stated: According to the number of rays corresponding to it in all the fitting energy spectra, a fitting algorithm is adopted to obtain the corresponding position energy level relationship function.

2. A method for obtaining the position of inclusions according to claim 1, characterized in that: The step of receiving gamma rays from each observation area by a gamma detection unit to obtain an observation energy spectrum corresponding to each observation area comprises: At least one gamma detection unit is correspondingly arranged in each of the observation areas; The gamma detection units arranged in different observation areas receive corresponding gamma rays, thereby obtaining an observation energy spectrum corresponding to each observation area.

3. The method for obtaining the position of inclusions according to claim 1, characterized in that: The step of receiving gamma rays from each observation area by a gamma detection unit to obtain an observation energy spectrum corresponding to each observation area comprises: Controlling the gamma detection unit to move around the object to be detected along a preset first trajectory until the gamma detection unit passes through all the observation areas; For each of the observation regions, when the gamma detection unit passes through the observation region, it receives corresponding gamma rays and obtains a corresponding observation energy spectrum.

4. The method for obtaining the position of inclusions according to claim 1, characterized in that: The step of receiving gamma rays from each observation area by a gamma detection unit to obtain an observation energy spectrum corresponding to each observation area comprises: Controlling the object to be detected to move around the gamma detection unit along a preset second trajectory until all the observation areas of the object to be detected pass through the gamma detection unit; For each of the observation areas, when the observation area of ​​the object to be detected moves to the gamma detection unit, the gamma detection unit receives corresponding gamma rays to obtain a corresponding observation energy spectrum.

5. The method for obtaining the position of inclusions according to claim 1, characterized in that: The step of judging whether there are inclusions in each observation area of ​​the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in the preset first energy spectrum includes: For each observation area: Compare the observed energy spectrum corresponding to the observed area with the first energy spectrum: If there is an energy level at which the difference between the number of rays of the observed energy spectrum and the number of rays of the first energy spectrum is greater than a preset first threshold, then the object to be detected has inclusions within the range of the observation area; If not, then there are no inclusions in the object to be detected within the range of the observation area.

6. A device for obtaining the position of inclusions, characterized in that: The method for obtaining the position of inclusions according to any one of claims 1 to 5 is implemented, wherein the obtaining device comprises: A neutron generating unit, used for emitting a neutron beam toward a first surface of the object to be detected; A gamma detection unit, used to receive gamma rays passing through each observation area, and obtain an observation energy spectrum corresponding to each observation area, wherein the observation energy spectrum includes the number of rays at each energy level; the other surface of the object to be detected is pre-divided into a number of observation areas; A control unit is used to determine whether there are inclusions in each observation area of ​​the object to be detected according to the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and when inclusions exist, calculate the position of the inclusion based on a pre-constructed position-energy-level relationship function; wherein the first energy spectrum is an energy spectrum obtained after neutron beam irradiation of a standard target object, each of the position-energy-level relationship functions corresponds to one energy level, and the position-energy-level relationship function describes the relationship between the position of the inclusion and the number of rays at the corresponding energy level.

7. The device for obtaining the position of inclusions according to claim 6, characterized in that: There are multiple gamma detection units, and at least one gamma detection unit is correspondingly arranged in one observation area.

8. The device for obtaining the position of inclusions according to claim 6, characterized in that: The acquisition device also includes: A first moving unit, used for moving the gamma detection unit; And, the control unit is further used to control the gamma detection unit to move around the object to be detected along a first trajectory through the first moving unit, so that the gamma detection unit passes through all the observation areas; The gamma detection unit is used to receive corresponding gamma rays when passing through the observation area to obtain a corresponding observation energy spectrum.

9. The device for obtaining the position of inclusions according to claim 6, characterized in that: The acquisition device also includes: A second moving unit, used to move the object to be detected; And, the control unit is further used to control the object to be detected to move around the gamma detection unit along a second trajectory through the second moving unit, so that all the observation areas of the object to be detected pass through the gamma detection unit; The gamma detection unit is used to receive corresponding gamma rays and obtain corresponding observation energy spectrum after the observation area of ​​the object to be detected is moved into position.

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