Method and equipment for acquiring positions of inclusions

Abstract

The invention relates to the field of material science, in particular to an inclusion position obtaining method and device, and the method comprises the steps: transmitting a neutron beam to a first surface of a to-be-detected object; receiving gamma rays of each observation area through a gamma detection unit to obtain an observation energy spectrum corresponding to each observation area; wherein the observation energy spectrum comprises the number of rays under each energy level; other surfaces of the to-be-detected object are divided into a plurality of observation areas in advance; according to the number of the rays in the observation energy spectrum and the number of the rays in a preset first energy spectrum, judging whether inclusions exist in the object to be detected or not, and determining the positions of the inclusions when the inclusions exist; wherein the first energy spectrum is an energy spectrum obtained after a neutron beam irradiates a standard target object. The positions of the inclusions are calculated by measuring the energy spectrum of the gamma rays, so that the detection speed is greatly improved, and the labor cost is remarkably reduced.

Description

Technical Field

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

[0002] Metal recycling aims to reduce environmental impact and improve resource efficiency. Metals can be recycled and reused indefinitely without sacrificing their physical properties. However, recycled metals may contain various inclusions, such as foreign metals, which can significantly impact the metal's quality and performance. Detecting and removing these inclusions is crucial in the metal recycling process.

[0003] Traditional methods of detecting inclusions in metal recycling rely primarily on manual disassembly and inspection. This process is time-consuming and labor-intensive, significantly increasing labor costs. Moreover, in large-scale recycling operations, the speed and efficiency of manual inspection are difficult to meet demand. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a method and device for obtaining the location of inclusions.

[0005] A first aspect of the present invention discloses a method for obtaining the location of inclusions, comprising: 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 plurality of observation areas; Based on the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, it is determined whether there are inclusions in the object to be inspected, and the location of the inclusions is confirmed if there are inclusions. The first energy spectrum is the energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0006] A second aspect of the present invention discloses a device for obtaining the position of inclusions, comprising: a neutron generating unit, configured to emit a neutron beam toward a first surface of the object to be detected; a gamma detection unit, configured 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 plurality of observation areas; A control unit is configured to determine whether inclusions are present in the object to be inspected based on the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and to locate the inclusions if present; wherein the first energy spectrum is an energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0007] The present invention emits a neutron beam toward the object to be detected, then uses a gamma detection unit arranged around the object to be detected to receive gamma rays passing through the observation area, and calculates the location of inclusions by measuring the energy spectrum of the gamma rays. This greatly improves the detection speed and significantly reduces labor costs, making the recovery process of the object to be detected more economical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0009] Figure 1 This is a structural diagram of a device for obtaining the location of inclusions disclosed in an embodiment of the present invention; Figure 2 is a schematic diagram of the observed energy spectrum disclosed in an embodiment of the present invention; Figure 3 is a schematic diagram of the position of the gamma detection unit disclosed in an embodiment of the present invention; Figure 4 This is a flow chart of a method for obtaining the location of inclusions disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0010] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0011] The terms "first," "second," and so on, in the description and claims of the present invention and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, or product comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, apparatus, or product.

[0012] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0013] The object to be detected in the present invention can be a metal, a polymer, or any material containing abundant atomic nuclei and capable of effectively interacting with neutrons and gamma rays, such as steel, plastic, boron, etc. The embodiments of the present invention use steel as an example to explain the specific implementation method of the present invention.

[0014] The detection of inclusions in steel has always been an important topic and technical difficulty in the field of materials processing. The presence of inclusions will seriously affect the mechanical properties, processing performance and service life of steel. Therefore, accurate and efficient detection of inclusions is crucial to ensuring the quality and reliability of steel products. However, traditional inclusion detection methods mainly rely on manual detection, which often has limitations such as detection efficiency. The present invention realizes non-destructive and rapid detection of inclusions by analyzing the neutron rays generated by the interaction between neutrons and inclusions, thereby greatly improving detection efficiency and accuracy, reducing detection costs, and providing strong technical support for steel quality control.

[0015] See also Figure 1 As shown, Figure 1 This is a structural diagram of an inclusion location acquisition device disclosed in an embodiment of the present invention. Figure 1 As shown, the device for obtaining the location of the inclusion includes: a neutron generating unit, configured to emit a neutron beam toward a first surface of the object to be detected; a gamma detection unit, configured 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 plurality of observation areas; A control unit is configured to determine whether inclusions are present in the object to be inspected based on the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and to locate the inclusions if present; wherein the first energy spectrum is an energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0016] 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 (e.g., a plutonium-Becquerel source) or a neutron generator (e.g., an Augerov tube and an accelerator drive system), and this embodiment of the present invention does not limit this.

[0017] Spontaneous fission sources utilize the spontaneous fission of certain radioactive isotopes (such as plutonium-239) to produce neutrons. These sources have the advantages of being simple and requiring no external power source, but they also have a relatively low neutron flux.

[0018] Neutron generators can produce even higher-intensity neutron fluxes. An Augerov tube is a common neutron generator, which uses high voltage to accelerate deuterium ions, causing them to fuse with deuterium or tritium nuclei in the target material, thereby producing neutrons. An accelerator-driven system uses a high-energy proton beam generated by a particle accelerator to bombard a heavy element target, generating neutrons as a side effect.

[0019] In this optional embodiment, the neutron generating unit is used to emit a neutron beam toward the first surface of the steel material, and the type of the neutron generating unit is not limited.

[0020] There is no restriction on the type of gamma detection unit; for example, scintillation detectors and semiconductor detectors can be used. Scintillation detectors use the property of certain substances to generate visible light or ultraviolet light when irradiated by gamma rays, and measure the intensity of gamma rays by measuring the intensity of this light. These substances are called scintillators, and common ones include sodium iodide and plastic scintillators. Semiconductor detectors use the property of semiconductor materials to generate charge carriers when irradiated by gamma rays, and measure the intensity of gamma rays by measuring the number of charge carriers. Common semiconductor detector materials include germanium and silicon.

[0021] The observed energy spectrum is a graph that describes the energy distribution of gamma rays. Figure 2 shows an observed energy spectrum, Figure 2 The horizontal axis represents the energy level and its unit is Mega electron Volt (Mev), and the vertical axis represents the normalized number of rays at the corresponding energy level, in units. Figure 2 Four different colored curves show the observed energy spectra of steel when the inclusions are iron, 10% silica, 20% silica, and 50% silica.

[0022] 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 contain impurities.

[0023] In an optional embodiment, the device for obtaining the location of inclusions further includes: a storage unit, configured to store the first energy spectrum and / or the fitted energy spectrum; 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.

[0024] In an optional embodiment, there are multiple gamma detection units, and at least one gamma detection unit is correspondingly provided for one observation area.

[0025] Figure 3 A schematic diagram showing the location of the gamma detection unit, Figure 3 In the figure, (1) represents the neutron generation unit, (2) represents the observation area, (3) represents the gamma detection unit, and (4) represents the inclusion. 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, and letters A to K represent a gamma detection unit. 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. Figure 3 As shown in the left figure, the observation area 5 corresponding to the gamma detection unit A of the inclusion position acquisition device is only provided with the gamma detection unit A.

[0026] In an optional embodiment, the acquisition device further includes: a first moving unit, configured to move the gamma detection unit; Furthermore, the control unit is further configured to control the gamma detection unit to move around the object to be detected along a first trajectory via 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.

[0027] It can be seen that this optional embodiment moves the gamma detection unit through the first moving 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.

[0028] In an optional embodiment, the first trajectory may be adaptively adjusted according to the shape and size of the object to be detected.

[0029] In an optional embodiment, the acquisition device further includes: A second moving unit, configured to move the object to be detected; Furthermore, the control unit is further configured to control the object to be detected to move around the gamma detection unit along a second trajectory via 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.

[0030] As can be seen, this optional embodiment uses the second mobile unit to move the object to be detected, so that all of the observation areas of the object to be detected can pass through the fixed gamma detection unit, which is another effective solution for achieving full coverage detection. This optional embodiment keeps the gamma detection unit stationary and collects the observation energy spectra of different observation areas by moving the object to be detected. The fixed gamma detection unit is simpler and more secure to install, reducing mechanical vibration and position errors caused by movement, which is beneficial to improving the stability and reliability of the observation energy spectrum data, reducing the number of gamma detection units required, and reducing equipment cost and complexity.

[0031] like Figure 4 As shown, Figure 4 This is a flow chart of a method for obtaining the location of an inclusion disclosed in an embodiment of the present invention. The method for obtaining the location of an inclusion uses any of the devices for obtaining the location of an inclusion described in the above embodiments, such as Figure 4 As shown, the method may include: S401, emitting a neutron beam toward a first surface of an object to be inspected; A neutron beam is a stream of neutrons. Neutrons are uncharged particles found in atomic nuclei, with a mass similar to that of protons. Because they carry no charge, neutrons can easily penetrate an atom's electron cloud and interact directly with the nucleus. Compared to other inspection methods, such as metallographic cutting, neutron irradiation is a non-destructive testing method. Neutron beams do not damage steel or affect its properties, making them suitable for in-line testing on production lines.

[0032] Steel matrix is ​​primarily composed of iron, while inclusions typically contain elements such as oxygen, sulfur, silicon, and manganese. Neutrons interact with different elements with varying cross-sections (probability of reaction). Neutron energy can be used to highlight the gamma rays of inclusion elements, allowing the inclusions to be distinguished from the steel.

[0033] S402. Receive gamma rays from each observation area through 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; and the other surface of the object to be detected is pre-divided into a plurality of observation areas. The generation of gamma rays is closely related to the location of inclusions. When a neutron beam strikes the steel, the neutrons interact with the elements in the inclusions, exciting the atomic nuclei and causing them to emit characteristic gamma rays. These gamma rays are emitted in all directions from the location of the inclusion, carrying spatial information about the inclusion.

[0034] When gamma rays propagate through steel, they gradually attenuate with increasing distance. The closer the gamma detection unit is to the inclusion, the higher the gamma ray intensity it receives. By comparing the number of rays emitted by gamma detection units at different locations, the relative distance between the inclusion and the gamma detection unit can be estimated.

[0035] In an optional embodiment, 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 includes: At least one gamma detection unit is correspondingly provided in each of the observation areas; The gamma-ray detection units arranged in different observation areas receive corresponding gamma rays, thereby obtaining an observation energy spectrum corresponding to each observation area.

[0036] As can be seen, this optional embodiment achieves full coverage and parallel detection of the object surface by configuring independent gamma detection units for each observation area. Data from different observation areas can be collected simultaneously, greatly improving detection efficiency and speed. Furthermore, independent gamma detection units facilitate modular and standardized design, facilitating assembly, maintenance, and upgrades of the detection system. If a gamma detection unit in a particular observation area fails, it can be replaced or repaired individually, improving the system's maintainability and reliability.

[0037] In an optional embodiment, 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 includes: Controlling the gamma detection unit to move along a preset first trajectory around the object to be detected until the gamma detection unit passes through all the observation areas; For each of the observation areas, when the gamma detection unit passes through the observation area, it receives corresponding gamma rays and obtains a corresponding observation energy spectrum.

[0038] As can be seen, this optional embodiment simplifies the system structure and reduces the number and cost of gamma detection units by moving the gamma detection units so that they cover all the observation areas. At the same time, the centralized gamma detection units facilitate precise control and synchronization, ensuring the consistency and comparability of data acquisition.

[0039] In an optional embodiment, 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 includes: 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.

[0040] This optional embodiment enables the acquisition of observation spectra from different observation areas by moving the object to be detected. The fixed gamma detection unit does not need to consider the effects of mechanical vibration, positional offset, and other factors during movement, thus ensuring the stability of the gamma detection unit's performance and the reliability of data acquisition. A precisely calibrated gamma detection unit can continuously provide high-quality observation spectra, reducing measurement errors caused by movement.

[0041] S403. Determine whether inclusions are present in the object to be inspected based on the number of rays in the observed energy spectrum and the number of rays in a preset first energy spectrum, and confirm the location of the inclusions if they are present; wherein the first energy spectrum is an energy spectrum obtained after irradiating a standard target object with a neutron beam.

[0042] In an optional embodiment, the step of determining whether inclusions are present in the object to be inspected based on the number of rays in the observed energy spectrum and the number of rays in the preset first energy spectrum, and confirming the location of the inclusions if inclusions are present, includes: For each observation area: Compare the observed energy spectrum corresponding to the observed area with the first energy spectrum: 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 the object to be detected has inclusions within the range of the observation area, and the location of the inclusion is calculated based on the corresponding observed energy spectrum; If not, then there is no inclusion in the object to be detected within the range of the observation area.

[0043] In this optional embodiment, by setting the first threshold, the probability of misjudgment due to measurement error can be reduced.

[0044] It can be seen that this optional embodiment can intuitively determine whether the object to be detected contains inclusions by comparing the observed energy spectrum corresponding to the observation area with the preset first energy spectrum. It is simple and intuitive, easy to implement, and can accurately determine whether the object to be detected contains inclusions within the scope of the observation area.

[0045] In an optional embodiment, the step of calculating the location of the inclusion based on the corresponding observed energy spectrum includes: Based on a pre-constructed position-energy-level relationship function, and according to the number of rays corresponding to each energy level in the observed energy spectrum, the predicted position of the inclusion at each energy level is calculated, wherein 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 predicted positions corresponding to all the energy levels are averaged to obtain the position of the inclusion within the range of the object to be detected in the observation area.

[0046] In an optional embodiment, the position energy level relationship function is constructed according to the following method: Obtaining fitted energy spectra of a plurality of sample target objects having inclusions; wherein the plurality of sample target objects are of the same size, the position of the inclusions in each sample target object is different, and the inclusions in each sample target object are set at a different designated position within a range corresponding to an 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 stated energy levels: 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.

[0047] A fitting algorithm is a mathematical method used to find the best curve or function for a given set of data points, making it as close as possible to the original data. The goal of a fitting algorithm is to find a mathematical model that can well describe or predict the trends and patterns of the data. The fitting algorithm in this embodiment can be selected from linear regression, polynomial regression, spline regression, etc., depending on the characteristics of the data.

[0048] For example, the pre-prepared data includes the first, second, and third fitting energy spectra. 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 quantity. 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 quantity. 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 quantity.

[0049] For the first energy level, the first coordinate, the first quantity, the second coordinate, the second quantity, the third coordinate, and the third quantity are used as inputs of the fitting algorithm to obtain a position energy level relationship function corresponding to the first energy level. The function inputs the energy quantity and outputs the coordinates of the inclusion.

[0050] In summary, the method and apparatus for obtaining the location of inclusions disclosed in the present invention greatly improve the detection speed and significantly reduce labor costs. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to 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 determined whether there are inclusions in the object to be detected, and the location of the inclusions is confirmed when inclusions exist; wherein the first energy spectrum is the energy spectrum obtained after neutron beam irradiation of a standard target object.

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 steps of judging 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: 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, and the position of the inclusions is calculated based on the corresponding observed energy spectrum; If not, then there are no inclusions in the object to be detected within the range of the observation area.

6. A method for obtaining the position of inclusions according to claim 5, characterized in that: Based on the corresponding observed energy spectrum, the steps for calculating the location of inclusions include: Based on the pre-constructed position-energy-level relationship function, the predicted position of the inclusion at each energy level is calculated 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 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 predicted positions corresponding to all the energy levels are averaged to obtain the position of the inclusion within the range of the object to be detected in the observation area.

7. A method for obtaining the location of inclusions according to claim 6, characterized in that: The position energy level relationship function is constructed as follows: 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 set at different designated positions within a range corresponding to 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.

8. 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 7 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 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 to confirm the location of the inclusions when inclusions exist; wherein the first energy spectrum is an energy spectrum obtained after neutron beam irradiation of a standard target object.

9. The device for obtaining the position of inclusions according to claim 8, characterized in that: There are multiple gamma detection units, and at least one gamma detection unit is correspondingly arranged in one observation area.

10. The device for obtaining the position of inclusions according to claim 8, 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.

11. The device for obtaining the position of inclusions according to claim 8, 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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