Deep sea in-situ detection signal method, device and equipment based on neutron capture principle

Abstract

The present invention provides a deep-sea in-situ detection signal method, device and equipment based on the neutron capture principle, which can be applied to the field of deep-sea in-situ detection technology. The deep-sea in-situ detection signal method based on the neutron capture principle includes: in response to receiving a delayed capture gamma ray, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the atoms in the mineral to be detected react with the neutron ray after the mineral to be detected on the seabed receives the neutron ray, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the mineral to be detected; performing energy analysis on the delayed capture gamma ray energy spectrum to obtain a detection result, wherein the detection result includes the target nuclide contained in the mineral to be detected.

Description

Technical Field

[0001] The present invention relates to the fields of neutron detection technology, nuclear detection and electronics technology and deep-sea in-situ detection technology, and more specifically to a deep-sea in-situ detection signal method, device and equipment based on the neutron capture principle. Background Art

[0002] Mineral resources, as non-renewable resources, are an important material basis and driving force for economic and social development. The deep sea is rich in mineral resources, so the detection of mineral resources in the deep sea has become one of the important research directions of current researchers. Existing technologies usually use towed X-ray fluorescence detection methods and image recognition-based detection methods to detect mineral resources in the deep sea. However, the detection efficiency and detection capabilities of the above detection technologies are greatly limited.

[0003] In the process of realizing the above-mentioned inventive concept, it was found through research that: in the related technology, the existing in-situ detection technology of deep-sea resources is affected by the marine environment, resulting in high detection limitations and low detection efficiency, and the existing technical problems of the complex structure of the device for deep-sea mineral resource detection. Summary of the invention

[0004] In view of the above problems, the present invention provides a method, device and equipment for deep-sea in-situ detection of signals based on the neutron capture principle.

[0005] According to a first aspect of the present invention, there is provided a deep-sea in-situ detection signal method based on the neutron capture principle, characterized in that it comprises: in response to receiving a delayed capture gamma ray, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the atoms in the mineral to be detected undergo a radiation capture reaction with the neutron ray after the mineral to be detected on the seabed receives the neutron ray, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the mineral to be detected; performing energy analysis on the delayed capture gamma ray energy spectrum to obtain a detection result, wherein the detection result includes a target nuclide contained in the mineral to be detected.

[0006] According to an embodiment of the present invention, in response to receiving a delayed captured gamma ray, a delayed captured gamma ray energy spectrum is generated according to the delayed captured gamma ray, including: converting the delayed captured gamma ray to generate a voltage signal corresponding to the delayed captured gamma ray; determining a trapezoidal forming algorithm corresponding to the signal characteristic from a plurality of candidate algorithms according to the signal characteristic of the voltage signal; converting the voltage signal using the trapezoidal forming algorithm to obtain a trapezoidal voltage signal, wherein the voltage signal is an exponential pulse signal; and acquiring energy information corresponding to the delayed captured gamma ray from the trapezoidal voltage signal to generate the delayed captured gamma ray energy spectrum.

[0007] According to an embodiment of the present invention, a delayed captured gamma ray is converted to generate a voltage signal corresponding to the delayed captured gamma ray, including: generating a scintillation light signal corresponding to the delayed captured gamma ray based on the delayed captured gamma ray; converting and amplifying the scintillation light signal to generate an intermediate voltage signal, wherein the intermediate voltage signal is an analog signal; performing analog-to-digital conversion on the intermediate voltage signal to obtain a digital voltage signal; and amplifying the digital voltage signal to obtain a voltage signal.

[0008] According to an embodiment of the present invention, based on the signal characteristics of a voltage signal, a trapezoidal shaping algorithm corresponding to the signal characteristics is determined from a plurality of candidate algorithms, including: based on the signal characteristics of the voltage signal, determining a mathematical model corresponding to the voltage signal; based on the mathematical model corresponding to the voltage signal, determining the trapezoidal shaping algorithm corresponding to the signal characteristics from a plurality of candidate algorithms.

[0009] According to an embodiment of the present invention, energy analysis is performed on the delayed-release captured gamma-ray energy spectrum to obtain detection results, including: determining a characteristic peak from the delayed-release captured gamma-ray energy spectrum; determining the energy value of the characteristic peak corresponding to the channel address of the characteristic peak based on a calibration coefficient between the channel address and the energy value constructed in advance; determining the nuclide of the mineral to be detected based on the energy value of the characteristic peak and determining the metal element of the mineral to be detected based on the nuclide.

[0010] According to an embodiment of the present invention, characteristic peaks are determined from a delayed-onset captured gamma-ray energy spectrum, including: smoothing the delayed-onset captured gamma-ray energy spectrum to obtain a smoothed delayed-onset captured gamma-ray energy spectrum, wherein the smoothed delayed-onset captured gamma-ray energy spectrum includes a shifted characteristic peak; performing zero-phase filtering on the smoothed delayed-onset captured gamma-ray energy spectrum to obtain a target delayed-onset captured gamma-ray energy spectrum, wherein the target delayed-onset captured gamma-ray energy spectrum represents an energy spectrum with smooth spectral lines and without shifted characteristic peaks; performing peak-finding processing on the target delayed-onset captured gamma-ray energy spectrum using an optimized symmetric zero-area transform peak-finding algorithm to obtain a characteristic peak.

[0011] According to an embodiment of the present invention, a method for constructing a calibration coefficient between a pre-constructed track address and an energy value comprises: obtaining a standard energy spectrum using Monte Carlo simulation according to dimensional parameter information of a detection device, wherein the standard energy spectrum represents energy spectrum data having stable energy and frequency characteristics; generating a background energy spectrum based on the detection results of naturally radioactive minerals without emitting neutron rays to the minerals to be detected in the seabed, wherein the background energy spectrum represents energy spectrum data of naturally radioactive minerals obtained by direct measurement; and obtaining a calibration coefficient between a pre-constructed track address and an energy value according to the standard energy spectrum and the background energy spectrum.

[0012] According to an embodiment of the present invention, a calibration coefficient between a pre-constructed channel address and an energy value is obtained based on a standard energy spectrum and a background energy spectrum, including: calculating the correlation between the standard energy spectrum and the background energy spectrum based on Gaussian peaks and spectral line features contained in each of the standard energy spectrum and the background energy spectrum; and obtaining a calibration coefficient between a pre-constructed channel address and an energy value based on the correlation between the standard energy spectrum and the background energy spectrum, wherein the calibration coefficient represents the corresponding relationship between the energy value and the channel address.

[0013] The second aspect of the present invention provides a device for deep-sea in-situ detection of signals based on the neutron capture principle, characterized in that it includes: a generation module for generating a delayed capture gamma ray energy spectrum in response to receiving a delayed capture gamma ray according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the atoms in the mineral to be detected on the seabed undergo a radiation capture reaction with the neutron ray after the mineral to be detected receives the neutron ray, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide that characterizes the mineral to be detected; an analysis module for performing energy analysis on the delayed capture gamma ray energy spectrum to obtain a detection result, wherein the detection result includes the target nuclide contained in the mineral to be detected.

[0014] A third aspect of the present invention provides an electronic device, comprising: one or more processors; a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the above method.

[0015] The fourth aspect of the present invention also provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, causes the processor to execute the above method.

[0016] The fifth aspect of the present invention also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0017] According to the deep-sea in-situ detection signal method, device and equipment based on the neutron capture principle of the present invention, by responding to the reception of delayed capture gamma rays, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma rays, and performing energy analysis on the delayed capture gamma ray energy spectrum, the target nuclides contained in the mineral to be detected are obtained, and the high-efficiency and high-quality detection of the metal elements of the mineral to be detected in the seabed is realized. Further, according to the principle of radiation capture reaction between the elements in the mineral to be detected that do not have natural radioactivity and neutrons, a delayed capture gamma ray with a higher reaction cross section and energy is generated, thereby reducing the interference of chlorine elements in seawater on the capture gamma rays, and then processing the delayed capture gamma rays, a detection result with higher accuracy and a wider detection range can be obtained, reducing the limitation of a single detection target. Furthermore, a neutron generator that cooperates with neutron rays and a high-performance, compact and modular gamma detector that processes the delayed capture gamma rays realizes the reliable extraction of nuclides of the mineral to be detected in the seabed, and adapts to the detection needs in a variety of different marine environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0019] Figure 1 A diagram showing an application scenario of a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention;

[0020] Figure 2 A flow chart showing a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown;

[0021] Figure 3 A flow chart showing the operation of the deep-sea in-situ detector of the present invention according to an embodiment of the present disclosure;

[0022] Figure 4 A schematic diagram showing the electronic module structure of a gamma detector;

[0023] Figure 5 A schematic diagram of a field programmable gate array according to an embodiment of the present disclosure is shown;

[0024] Figure 6 A schematic diagram showing digitized waveform processing according to an embodiment of the present invention is shown;

[0025] Figure 7 A schematic diagram showing a background energy spectrum and a standard energy spectrum according to an embodiment of the present invention is shown;

[0026] Figure 8A schematic diagram of a delayed-release capture gamma-ray energy spectrum according to an embodiment of the present invention is shown;

[0027] Fig. 9 A structural block diagram of a system for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown;

[0028] Fig.10 A structural block diagram of a device for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown;

[0029] Fig.11 A block diagram of an electronic device for a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0030] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0031] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0032] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0033] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0034] In the technical solution of the present invention, the user information (including but not limited to user personal information, user image information, user device information, such as location information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, invention and application of the relevant data comply with relevant laws, regulations and standards, take necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0035] Mineral resources, as non-renewable resources, are an important material basis and driving force for economic and social development. With the rapid development of the economy, the demand for metal minerals has increased year by year. The deep sea is rich in resources. For example, polymetallic manganese nodules and cobalt-rich crusts on the seabed have rich reserves of manganese, iron and cobalt resources. Therefore, the detection of deep-sea resources, especially the detection of metal mineral resources, is of great significance. At present, the in-situ detection of seabed metal mineral resources is mainly based on the detection method of towed X-ray fluorescence and the detection method based on image recognition. However, the penetration ability of X-rays in the towed X-ray fluorescence detection method in seawater is limited, and as the working depth increases, the requirements for the detection window increase. The detection method based on image recognition can only be indirectly detected according to the morphology of polymetallic nodules, and the detection ability of minerals such as cobalt-rich crusts is limited. Furthermore, neutrons have the characteristics of being uncharged and have extremely strong penetration ability, so the use of neutron detection has become a research direction for scientists to detect seabed metal minerals.

[0036] However, existing neutron detection is usually based on neutron prompt gamma rays to detect seabed sediments and rare earth resources, but the seawater has a very high content of chlorine, which makes the prompt capture reaction cross-section larger, bringing inevitable interference to the detection route based on prompt gamma rays, and has extremely high requirements for the shielding and gamma ray resolution capabilities of the equipment. During the research and development process, it was found that in the relevant technology, the existing deep-sea resource in-situ detection technology is affected by the marine environment, resulting in high detection limitations and low detection efficiency, and the existing device structure for deep-sea mineral resource detection is complex.

[0037] In view of this, an embodiment of the present invention provides a method for deep-sea in-situ detection of signals based on the neutron capture principle, characterized in that it includes: in response to receiving a delayed capture gamma ray, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the atoms in the mineral to be detected on the seabed undergo a radiation capture reaction with the neutron ray after the mineral to be detected receives the neutron ray, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the mineral to be detected; performing energy analysis on the delayed capture gamma ray energy spectrum to obtain a detection result, wherein the detection result includes a target nuclide contained in the mineral to be detected.

[0038] Figure 1 A diagram showing an application scenario of a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention.

[0039] like Figure 1 As shown, the application scenario according to this embodiment may include a first transmitting device 101, a target object 102, and a receiver 103 all on the seabed. The first transmitting device 101 is used to send neutron rays to the target object 102.

[0040] The user may use the first transmitting device 101 to interact with the target object 102 and the receiver 103 to receive or send signals, etc.

[0041] The receiver 103 may be a receiver for receiving signals, for example, receiving and processing the ray signal sent by the target object 102 (for example only). The receiver 103 may analyze and process the received ray signal and other data, and feed back the processing result to the first transmitting device 101.

[0042] It should be noted that the method for deep-sea in-situ detection of signals based on the neutron capture principle provided in the embodiment of the present invention can generally be performed by the receiver 103. Accordingly, the device for deep-sea in-situ detection of signals based on the neutron capture principle provided in the embodiment of the present invention can generally be arranged in the receiver 103. The method for deep-sea in-situ detection of signals based on the neutron capture principle provided in the embodiment of the present invention can also be performed by a receiver or a receiver cluster that is different from the receiver 103 and can communicate with the first transmitting device 101 and / or the receiver 103. Accordingly, the device for deep-sea in-situ detection of signals based on the neutron capture principle provided in the embodiment of the present invention can also be arranged in a receiver or a receiver cluster that is different from the receiver 103 and can communicate with the first transmitting device 101 and / or the receiver 103.

[0043] It should be understood that Figure 1 The number of the first transmitting device, the target object and the receiver in the embodiment is only for illustration. According to the implementation requirements, there may be any number of transmitting devices, observation objects and receivers.

[0044] The following will be based on Figure 1 The scene described by Figure 2~Figure 9 The method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the invention is described in detail.

[0045] Figure 2 A flow chart of a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown.

[0046] like Figure 2 As shown, the method for deep-sea in-situ detection of signals based on the neutron capture principle of this embodiment includes operations S210 to S220.

[0047] In operation S210 , in response to receiving a delayed capture gamma ray, a delayed capture gamma ray energy spectrum is generated according to the delayed capture gamma ray.

[0048] According to an embodiment of the present invention, the target delayed capture gamma ray is generated after the mineral to be detected in the seabed receives the neutron ray and the atoms in the mineral to be detected undergo a radiation capture reaction with the neutron ray. The delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide that characterizes the mineral to be detected.

[0049] According to an embodiment of the present invention, a neutron generator emits neutron rays to the minerals to be detected in the seabed. The minerals to be detected in the seabed usually contain a high content of manganese. After capturing neutrons, manganese releases delayed captured gamma rays. Among them, the manganese content of the minerals to be detected in the seabed is >10%. The minerals to be detected in the seabed in the present invention can be characterized as minerals that do not have natural radioactivity.

[0050] According to an embodiment of the present invention, the composite nucleus formed after the manganese element in the mineral to be detected in the seabed captures a neutron has natural radioactivity, so that the atomic nucleus is activated, and new gamma rays may be generated during the decay of the activated composite nucleus, namely, activated gamma rays or delayed captured gamma rays, wherein the delayed captured gamma rays released after the manganese element captures a neutron usually have a cross section of 847 keV, 13.1 b or 1811 keV, 3.6 b or 2113 keV, 0.3 b.

[0051] According to an embodiment of the present invention, since the manganese element in the mineral to be detected on the seabed generates delayed capture gamma rays with good ray energy, element content and reaction cross section after capturing neutrons, the manganese element becomes an ideal anchor point for in-situ detection of deep-sea metal minerals.

[0052] According to an embodiment of the present invention, during the radiation capture reaction between atoms in the mineral to be detected and neutron rays, an (n, α) reaction can also be performed to release α particles, and a (n, p) reaction can be performed to release protons. For low-energy incident neutrons, only a few light nuclei can undergo (n, α) or (n, p) reactions, and the main reaction is still the (n, γ) reaction, that is, delayed capture gamma rays.

[0053] According to an embodiment of the present invention, the gamma detector may include a lanthanum bromide scintillation crystal, a SiPM (Silicon Photomultiplier) and an FPGA (Field-Programmable Gate Array).

[0054] According to an embodiment of the present invention, the above method is combined with a neutron generator that emits neutron rays and a high-performance, compact, modular gamma detector that processes delayed captured gamma rays, thereby realizing the reliable extraction of nuclides of the minerals to be detected in the seabed, and adapting to the detection needs in a variety of different marine environments.

[0055] According to an embodiment of the present invention, after the mineral to be detected in the seabed generates delayed captured gamma rays, the lanthanum bromide scintillation crystal, silicon photomultiplier tube and field programmable gate array in the gamma detector generate a delayed captured gamma ray energy spectrum based on the detected delayed captured gamma rays, so as to analyze the delayed captured gamma ray energy spectrum to obtain the detection result.

[0056] In operation S220, energy analysis is performed on the energy spectrum of the delayed capture gamma ray to obtain a detection result.

[0057] According to an embodiment of the present invention, the detection result includes the target nuclide contained in the mineral to be detected.

[0058] According to an embodiment of the present invention, a field programmable gate array in a gamma detector is used to perform energy analysis on a delayed capture gamma ray energy spectrum to obtain target nuclides contained in the mineral to be detected, so as to determine the metal composition of the mineral to be detected based on the target nuclides.

[0059] According to an embodiment of the present invention, when the detection is successful, the field programmable gate array can send a detection end instruction to the neutron generator, thereby ending the detection of minerals in the seabed.

[0060] According to an embodiment of the present invention, in response to receiving a delayed capture gamma ray, a delayed capture gamma ray energy spectrum is generated according to the delayed capture gamma ray, and the energy analysis of the delayed capture gamma ray energy spectrum is performed to obtain the target nuclides contained in the mineral to be detected, thereby realizing high-efficiency and high-quality detection of metal elements in the mineral to be detected in the seabed. Further, according to the principle that the elements in the mineral to be detected that do not have natural radioactivity undergo radiation capture reaction with neutrons, a delayed capture gamma ray with a higher reaction cross section and energy is generated, thereby reducing the interference of chlorine elements in seawater on the capture gamma ray, and then the delayed capture gamma ray is processed, so that a detection result with higher accuracy and a wider detection range can be obtained, reducing the limitation of a single detection target. Furthermore, according to the above method, a neutron generator that emits neutron rays and a high-performance, compact, modular gamma detector that processes the delayed capture gamma ray can be used to realize the reliable extraction of nuclides in the mineral to be detected in the seabed, and adapt to the detection needs in a variety of different marine environments.

[0061] According to an embodiment of the present invention, in response to receiving a delayed capture gamma ray, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray includes:

[0062] According to an embodiment of the present invention, a conversion process is performed on the delayed-release captured gamma ray to generate a voltage signal corresponding to the delayed-release captured gamma ray.

[0063] According to an embodiment of the present invention, a delayed-release captured gamma ray is converted to generate a voltage signal corresponding to the delayed-release captured gamma ray, including:

[0064] According to an embodiment of the present invention, a scintillation light signal corresponding to a delayed capture gamma ray is generated.

[0065] According to an embodiment of the present invention, after receiving the delayed capture gamma rays generated by the detected mineral after the radiation capture reaction, the lanthanum bromide scintillation crystal in the gamma detector generates a scintillation light signal corresponding to the delayed capture gamma rays.

[0066] According to an embodiment of the present invention, the gamma detector includes an array composed of a plurality of lanthanum bromide scintillation crystals. The lanthanum bromide scintillation crystals have the advantages of high light output, high energy resolution and high detection efficiency. Thus, by using the lanthanum bromide scintillation crystals, it is possible to timely respond to the delayed captured gamma rays to generate scintillation light signals with high energy resolution and high light output, and it is convenient for subsequent module devices to process and convert the scintillation light signals, thereby improving efficiency.

[0067] According to the embodiment of the present invention, the flashing light signal is converted and amplified to generate an intermediate voltage signal.

[0068] According to an embodiment of the present invention, the intermediate voltage signal is an analog signal.

[0069] According to an embodiment of the present invention, a silicon photomultiplier tube in a gamma detector is used to convert and amplify the scintillation light signal to generate an intermediate voltage signal.

[0070] According to an embodiment of the present invention, the size of the silicon photomultiplier tube corresponds to the size of the lanthanum bromide scintillation crystal array, and the lanthanum bromide scintillation crystal array is coupled to the SiPM photosensitive surface through a coupling agent such as optical silicone oil.

[0071] According to an embodiment of the present invention, when a flashing light signal enters the photosensitive surface of a silicon photomultiplier tube, the silicon photomultiplier tube generates a current signal corresponding to the flashing light signal, and then uses a transimpedance amplifier to amplify the current signal to obtain an amplified current signal, which is then converted to obtain an intermediate voltage signal.

[0072] According to an embodiment of the present invention, the current signal corresponding to the flashing light signal generated by the silicon photomultiplier tube is an analog signal.

[0073] According to an embodiment of the present invention, the magnification may be 8 times, but is not limited thereto.

[0074] According to an embodiment of the present invention, analog-to-digital conversion is performed on the intermediate voltage signal to obtain a digital voltage signal.

[0075] According to an embodiment of the present invention, an analog-to-digital converter is used to perform analog-to-digital conversion on the intermediate voltage signal to obtain a digital voltage signal.

[0076] According to an embodiment of the present invention, the digital voltage signal is amplified to obtain a voltage signal.

[0077] According to an embodiment of the present invention, the silicon photomultiplier tube is small in size and requires a low power supply voltage. By using the silicon photomultiplier tube to realize the conversion of the scintillation light signal into the electrical signal, the size of the gamma detector is further reduced, making the detection device more compact and modular.

[0078] According to an embodiment of the present invention, a scintillation light signal corresponding to the delayed captured gamma ray is generated according to the delayed captured gamma ray, a current signal is generated according to the scintillation light signal, and the current signal is amplified and converted to generate an intermediate voltage signal, and then the intermediate voltage signal is subjected to analog-to-digital conversion to obtain a digital voltage signal, and finally the digital voltage signal is amplified once to obtain a voltage signal, and the voltage signal is sent to a field programmable gate array for signal analysis by the field programmable gate array, thereby realizing processing between the current signal and the voltage signal based on waveform digitization technology, and cooperating with the amplifier to amplify the electrical signal for processing by the field programmable gate array, and at the same time, facilitating the storage of the original scintillation light signal output by the lanthanum bromide scintillation crystal and the original voltage signal output by the silicon photomultiplier tube.

[0079] According to an embodiment of the present invention, the gamma detector also includes a temperature sensor, the field programmable gate array includes a temperature compensation module, the temperature sensor is arranged near the silicon photomultiplier tube, and the working temperature of the silicon photomultiplier tube is monitored in real time. The temperature sensor transmits the acquired working temperature to the temperature compensation module, and the temperature compensation module judges the received working temperature of the silicon photomultiplier tube. When the working temperature exceeds a predetermined threshold, the working voltage of the silicon photomultiplier tube is adjusted, thereby reducing the influence of temperature on the avalanche voltage, maintaining the gain of the silicon photomultiplier tube stable, and achieving the effect of adjusting the working voltage of the silicon photomultiplier tube according to the working temperature of the silicon photomultiplier tube.

[0080] According to an embodiment of the present invention, based on the signal characteristics of the voltage signal, a trapezoidal shaping algorithm corresponding to the signal characteristics is determined from a plurality of candidate algorithms.

[0081] According to an embodiment of the present invention, according to the signal characteristics of the voltage signal, a trapezoidal shaping algorithm corresponding to the signal characteristics is determined from a plurality of candidate algorithms, including:

[0082] According to an embodiment of the present invention, a mathematical model corresponding to the voltage signal is determined according to the signal characteristics of the voltage signal.

[0083] According to an embodiment of the present invention, the field programmable gate array determines that the mathematical model corresponding to the voltage signal is the e-exponential model according to the double e-exponential signal feature of the received voltage signal.

[0084] According to an embodiment of the present invention, a trapezoidal shaping algorithm corresponding to the signal feature is determined from a plurality of candidate algorithms based on a mathematical model corresponding to the voltage signal.

[0085] According to the embodiment of the present invention, since the luminescence decay time of the lanthanum bromide scintillation crystal is extremely fast, the decay time of the scintillation light signal is also very fast, resulting in a short leading edge rise time of the waveform of the voltage signal output by the silicon photomultiplier tube, satisfying the characteristics of the e-exponential model.

[0086] According to an embodiment of the present invention, based on the e-exponential model, it is determined from a plurality of candidate algorithms to adopt a trapezoidal shaping algorithm corresponding to the e-exponential model to process the voltage signal.

[0087] According to an embodiment of the present invention, by determining a mathematical model corresponding to a voltage signal based on the signal characteristics of the voltage signal, and then determining a trapezoidal shaping algorithm that can obtain more accurate results based on the mathematical model, it is achieved to determine an algorithm for processing the voltage signal, so as to facilitate efficient and accurate signal processing and information extraction of the voltage signal using the trapezoidal shaping algorithm.

[0088] According to an embodiment of the present invention, a trapezoidal voltage signal is converted using a trapezoidal shaping algorithm to obtain a trapezoidal voltage signal.

[0089] According to an embodiment of the present invention, the voltage signal is an exponential pulse signal.

[0090] According to an embodiment of the present invention, a trapezoidal shaping algorithm is used to transform a voltage signal having an exponential pulse feature into a trapezoidal voltage signal having a flat top.

[0091] According to an embodiment of the present invention, energy information corresponding to the delayed-release gamma-ray capture is acquired from the trapezoidal voltage signal to generate a delayed-release gamma-ray capture spectrum.

[0092] According to an embodiment of the present invention, the charge quantity information corresponding to the voltage signal is obtained from the flat-top part of the trapezoidal voltage signal. Since the charge quantity information corresponding to the voltage signal is equivalent to the energy information of the delayed-release captured gamma ray, the charge quantity spectrum generated according to the charge quantity information corresponding to the voltage signal is the delayed-release captured gamma ray energy spectrum.

[0093] According to the embodiments of the present invention, the delayed captured gamma rays are converted to generate voltage signals corresponding to the delayed captured gamma rays, a trapezoidal shaping algorithm corresponding to the signal characteristics is determined from a plurality of candidate algorithms according to the signal characteristics of the voltage signal, the voltage signal is converted using the trapezoidal shaping algorithm to obtain a trapezoidal voltage signal, energy information corresponding to the delayed captured gamma rays is obtained from the trapezoidal voltage signal, and an energy spectrum of the delayed captured gamma rays is generated, thereby realizing the extraction of the energy of the delayed captured gamma rays and the construction of the energy spectrum corresponding to the delayed captured gamma rays, and in combination with lanthanum bromide scintillation crystals, silicon photomultiplier tubes and field programmable gate arrays, a compact and modular gamma detector is obtained while performing signal processing efficiently.

[0094] According to an embodiment of the present invention, energy analysis is performed on the energy spectrum of the delayed capture gamma ray to obtain a detection result, including:

[0095] According to an embodiment of the present invention, a characteristic peak is determined from the energy spectrum of the delayed capture gamma ray.

[0096] According to an embodiment of the present invention, determining a characteristic peak from a delayed capture gamma ray energy spectrum includes:

[0097] According to an embodiment of the present invention, a delayed-release capture gamma-ray energy spectrum is smoothed to obtain a smoothed delayed-release capture gamma-ray energy spectrum.

[0098] According to an embodiment of the present invention, the smoothed delayed capture gamma-ray spectrum includes a shifted characteristic peak.

[0099] According to an embodiment of the present invention, an IIR low-pass filter (infinite impulse response filter) whose parameters can be adjusted in real time is used to smooth the slow-release captured gamma-ray energy spectrum, which can meet the different smoothing requirements of the low-energy region and the high-energy region in the slow-release captured gamma-ray energy spectrum, so as to obtain an energy spectrum with good smoothing effect.

[0100] According to an embodiment of the present invention, zero-phase filtering is performed on the smoothed delayed-release capture gamma-ray energy spectrum to obtain a target delayed-release capture gamma-ray energy spectrum.

[0101] According to an embodiment of the present invention, the target delayed capture gamma-ray energy spectrum represents an energy spectrum with smooth spectral lines and no shift in characteristic peaks.

[0102] According to an embodiment of the present invention, in the process of smoothing the delayed-onset captured gamma-ray energy spectrum, the energy spectrum peak in the delayed-onset captured gamma-ray energy spectrum will be shifted, so the smoothed delayed-onset captured gamma-ray energy spectrum is filtered and combed by adopting a zero-phase filtering method to obtain an energy spectrum with smooth spectral lines and no shift in characteristic peaks, that is, the target delayed-onset captured gamma-ray energy spectrum.

[0103] According to an embodiment of the present invention, an optimized symmetric zero-area transform peak-finding algorithm is used to perform peak-finding processing on the target delayed-fire capture gamma-ray energy spectrum to obtain a characteristic peak.

[0104] According to an embodiment of the present invention, a symmetric zero-area transform peak-finding algorithm and a Gaussian function polynomial are combined to obtain an optimized symmetric zero-area transform peak-finding algorithm. The optimized symmetric zero-area transform peak-finding algorithm is used to process the target delayed-release captured gamma-ray energy spectrum to determine multiple characteristic peaks in the target delayed-release captured gamma-ray energy spectrum.

[0105] According to an embodiment of the present invention, based on the polynomial approximation of the Gaussian function, the convolution processing required for the symmetric zero-area transform is approximated as a form of an IIR filter, thereby simplifying the amount of calculation and facilitating the automatic adjustment of the transformation parameters required by the algorithm, and the power consumption in the field programmable gate array is lower and the amount of calculation is less.

[0106] According to an embodiment of the present invention, a smoothed slow-release trapped gamma-ray energy spectrum is obtained by smoothing the slow-release trapped gamma-ray energy spectrum, a zero-phase filter is performed on the smoothed slow-release trapped gamma-ray energy spectrum to obtain a target slow-release trapped gamma-ray energy spectrum, and a peak-finding algorithm is used to perform peak-finding processing on the target slow-release trapped gamma-ray energy spectrum to obtain a characteristic peak, thereby achieving processing of the slow-release trapped gamma-ray energy spectrum to obtain a characteristic peak while reducing the amount of calculation and power consumption. Furthermore, by using an IIR filter with variable parameters, the spectral lines in the low-energy region and the high-energy region of the slow-release trapped gamma-ray energy spectrum can have a better smoothing effect. Furthermore, by optimizing the symmetric zero-area transform peak-finding algorithm, the calculation speed of the field programmable gate array is faster, the power consumption is lower, and the resource consumption is less.

[0107] According to an embodiment of the present invention, the energy value of the characteristic peak corresponding to the track address of the characteristic peak is determined based on a pre-constructed calibration coefficient between the track address and the energy value.

[0108] According to an embodiment of the present invention, a method for constructing a pre-constructed calibration coefficient between a channel address and an energy value includes:

[0109] According to an embodiment of the present invention, a standard energy spectrum is obtained by Monte Carlo simulation based on the size parameter information of the detection device.

[0110] According to an embodiment of the present invention, the standard energy spectrum represents energy spectrum data having stable energy and frequency characteristics.

[0111] According to an embodiment of the present invention, a basic energy spectrum is generated based on the detection results of minerals with natural radioactivity without emitting neutron rays to the minerals to be detected in the seabed.

[0112] According to an embodiment of the present invention, the background energy spectrum characterizes the energy spectrum data of minerals with natural radioactivity obtained by direct measurement.

[0113] According to the embodiments of the present invention, since the natural isotope 138La of the lanthanum element in the lanthanum bromide scintillation crystal has a radioactive background, its decay will emit electrons and gamma rays, so the background radioactivity will show certain characteristics in the background energy spectrum measured by the gamma detector, including characteristic Gaussian peaks and some continuous spectral lines. The gamma detector is used to directly detect minerals with natural radioactivity and spontaneous radiation, and the energy spectrum obtained is the local energy spectrum.

[0114] According to an embodiment of the present invention, a calibration coefficient between a pre-constructed channel address and an energy value is obtained based on a standard energy spectrum and a background energy spectrum.

[0115] According to an embodiment of the present invention, the correlation between the background energy spectrum and the standard energy spectrum is calculated based on the background energy spectrum and the standard energy spectrum, and the detection accuracy of the gamma detector and the relationship between the channel address and the energy value are confirmed.

[0116] According to an embodiment of the present invention, obtaining a pre-constructed calibration coefficient between a channel address and an energy value according to a standard energy spectrum and a background energy spectrum includes:

[0117] According to an embodiment of the present invention, the correlation between the standard energy spectrum and the background energy spectrum is calculated based on the Gaussian peaks and spectral line features contained in the standard energy spectrum and the background energy spectrum respectively.

[0118] According to an embodiment of the present invention, a calibration coefficient between a pre-constructed channel address and an energy value is obtained according to the correlation between a standard energy spectrum and a background energy spectrum.

[0119] According to an embodiment of the present invention, the calibration coefficient represents the corresponding relationship between the predetermined energy value and the track address.

[0120] According to an embodiment of the present invention, a standard energy spectrum is obtained by using Monte Carlo simulation based on the size parameter information of the detection device. Without emitting neutron rays to the minerals to be detected in the seabed, a background energy spectrum is generated based on the detection results of minerals with natural radioactivity. The correlation between the standard energy spectrum and the background energy spectrum is calculated according to the Gaussian peaks and spectral line features contained in each of the standard energy spectrum and the background energy spectrum. According to the correlation between the standard energy spectrum and the background energy spectrum, a calibration coefficient between the pre-constructed energy value and the track address is obtained, thereby obtaining the relationship between energy and track address, so that the characteristic peaks in the delayed capture gamma-ray energy spectrum can be analyzed and processed according to the relationship between energy and track address to obtain the detection result.

[0121] According to an embodiment of the present invention, based on the relationship between the calculated energy value and the channel address, the channel address of the characteristic peak is converted to obtain a target energy value corresponding to the characteristic peak.

[0122] According to an embodiment of the present invention, the nuclide of the mineral to be detected is determined according to the energy value of the characteristic peak, and the metal element of the mineral to be detected is determined according to the nuclide.

[0123] According to an embodiment of the present invention, by determining a characteristic peak from a delayed-onset captured gamma-ray energy spectrum, determining the energy value of the characteristic peak corresponding to the track address of the characteristic peak based on a calibration coefficient between the track address and the energy value in advance, determining the nuclide of the mineral to be detected based on the energy value of the characteristic peak, and determining the metal element of the mineral to be detected based on the nuclide, the analysis of energy information in the delayed-onset captured gamma-ray energy spectrum is achieved, determining the nuclide of the mineral to be detected based on the correspondence between the track address-energy-nuclide, and determining the metal element contained in the mineral to be detected based on the nuclide, thereby achieving accurate detection of the mineral to be detected in the seabed.

[0124] Figure 3 The flowchart showing the operation of the deep-sea in-situ detector according to the embodiment of the present invention is shown.

[0125] like Figure 3 As shown, Figure 3 The working process of the deep sea in-situ detector of the present invention is shown, S310 turns on the instrument, first turns on the deep sea in-situ detector of the present invention, performs S320 instrument initialization on the deep sea in-situ detector, and obtains the background energy spectrum and standard energy spectrum of the deep sea in-situ detector, obtains the calibration coefficient between energy and address according to the background energy spectrum and the standard energy spectrum, S330 the neutron generator emits neutrons, and then uses the neutron generator to emit neutron rays to the minerals to be detected in the seabed, after the minerals to be detected in the seabed receive the neutron rays, the manganese element and the neutron rays undergo radiation capture reaction to generate delayed captured gamma rays, the lanthanum bromide scintillation crystal array of the gamma detector emits scintillation light to the silicon photomultiplier tube after receiving the delayed captured gamma rays, the silicon photomultiplier tube converts the scintillation light signal into a current signal first, then amplifies and converts it into a voltage signal, and then performs secondary amplification and analog-to-digital conversion on the voltage signal to obtain a digital voltage signal, and the field programmable gate array uses a trapezoidal forming algorithm to The digital voltage signal is processed to obtain a trapezoidal voltage signal, thereby obtaining the charge quantity information corresponding to the voltage pulse signal, that is, the energy information of the delayed gamma-ray capture, and a delayed gamma-ray capture spectrum is generated according to the energy information of the delayed gamma-ray capture at S340, and the delayed gamma-ray capture spectrum is subjected to energy spectrum analysis at S350 to obtain the nuclide, and the delayed gamma-ray capture spectrum is first smoothed and filtered to obtain a target delayed gamma-ray capture spectrum with smooth spectrum lines and no peak offset, and the target delayed gamma-ray capture spectrum is subjected to peak-finding processing using an optimized symmetric zero-area transform peak-finding algorithm to obtain each characteristic peak in the target delayed gamma-ray capture spectrum, and a channel address-energy-nuclide conversion is performed according to the channel address of each characteristic peak and the calibration coefficient obtained based on the background spectrum and the standard spectrum to obtain the nuclide analysis result of the mineral to be detected, and it is determined at S360 that the detection is finished, and the deep-sea in-situ detector of the present invention is turned off, that is, the instrument is shut down at S370.

[0126] Figure 4 Schematic diagram showing the electronics module structure of a gamma detector.

[0127] like Figure 4 As shown, Figure 4The electronic module structure of the gamma detector is shown, including the front-end electronic circuit and the data processing circuit. The front-end electronic circuit includes a lanthanum bromide scintillation crystal readout array (SiPM readout array), a switching power supply and a temperature sensor. The data processing circuit includes a differential amplifier, an analog-to-digital conversion module, a clock module, an FPGA module, a storage module, a sensor, a switching power supply, a neutron source interface and a watertight connector. The lanthanum bromide scintillation crystal readout array (SiPM readout array) includes The lanthanum bromide scintillation crystal array (SiPM array) and the lanthanum bromide scintillation crystal readout circuit (SiPM readout circuit) include 6 resistors R S , R F , R t , two R1, R2, a capacitor C F and an output V out . In the front-end electronic circuit, the lanthanum bromide scintillation crystal array transmits the optical signal to the lanthanum bromide scintillation crystal readout circuit for processing. After two-stage amplification and current-voltage conversion of the lanthanum bromide scintillation crystal readout circuit, the temperature sensor connected to the FPGA module monitors the lanthanum bromide scintillation crystal readout array (SiPM readout array), and outputs a gain-stable intermediate voltage signal to the differential amplifier in the data processing circuit. After another amplification and analog-to-digital conversion, a digital voltage signal is obtained, which is input to the FPGA module. After processing by the FPGA module, the detection result is obtained, and an instruction to control the emission or stop of neutron rays is generated according to the detection result, and an instruction is issued to the neutron emission device through the neutron source interface. The cables, sensors and other electronic equipment in the underwater environment are sealed and protected by a watertight connector, and the lanthanum bromide scintillation crystal readout array (SiPM readout array) is powered by a switching power supply, so that the front-end electronic circuit and data processing circuit can operate normally.

[0128] Figure 5 A schematic diagram of a field programmable gate array according to an embodiment of the present invention is shown.

[0129] like Figure 5 As shown, Figure 5The firmware structure block diagram of the field programmable gate array is shown. The firmware structure of the field programmable gate array includes an analog-to-digital converter interface, a memory unit, a data processing module, a system control unit, a protocol unit, a temperature compensation module and an uplink interface. The analog-to-digital converter interface sends a digital voltage signal in the form of a pulse signal to the data processing module. The data processing module processes the digital voltage signal to obtain processed data. The data processing module sends the digital voltage signal in the form of a pulse signal to the memory unit for storage. The data processing module sends scientific data to the protocol unit and interacts with the protocol unit for data processing status. The protocol unit sends autonomous acquisition parameters to the system control unit based on the scientific data and stores the autonomous acquisition parameters in the memory unit. The protocol unit can read the data parameters in the memory unit through the protocol read-write interface. According to the temperature detection of the external circuit, the protocol unit controls the temperature compensation module to perform temperature compensation on the external circuit. At the same time, the external circuit sends instructions to the protocol unit through the uplink interface to control the protocol unit to perform operations such as processing data.

[0130] Figure 6 A schematic diagram of digitized waveform processing according to an embodiment of the present invention is shown.

[0131] like Figure 6 As shown, Figure 6 A digital waveform processing unit is shown. The digital waveform processing unit of the field programmable gate array includes a digital filter, an information extraction module, a trigger waveform packaging, an energy spectrum statistics module, a waveform upload multiplexing module and a data framing module. The voltage signal of the exponential pulse signal is filtered by a digital filter to obtain a trapezoidal voltage signal. The trapezoidal voltage signal which is a trapezoid after filtering is sent to the information extraction module. The information extraction module extracts charge / energy information from the signal and sends it to the energy spectrum statistics module. The energy spectrum statistics module generates a delayed-release captured gamma-ray energy spectrum according to the charge / energy information, and uploads the delayed-release captured gamma-ray energy spectrum to the data framing module for subsequent processing. In the process of the information extraction module extracting the charge / energy information from the signal, the waveform packaging is triggered, and the trapezoidal voltage signal which is a trapezoid after filtering is also sent to the data framing module through waveform upload multiplexing for subsequent processing, and the trapezoidal voltage signal is stored at the same time.

[0132] Figure 7 A schematic diagram of a background energy spectrum and a standard energy spectrum according to an embodiment of the present invention is shown.

[0133] like Figure 7 As shown, Figure 7The background energy spectrum and the standard energy spectrum are shown. The horizontal axis represents energy and the vertical axis on the left represents counts. Among them, the manganese metal activation energy spectrum is the standard energy spectrum obtained by Monte Carlo simulation based on the size parameter information of the detection device. The calibration coefficient between the channel address and energy can be obtained based on the background energy spectrum and the standard energy spectrum.

[0134] Figure 8 A schematic diagram of a delayed capture gamma-ray energy spectrum according to an embodiment of the present invention is shown.

[0135] like Figure 8 As shown, Figure 8 The delayed-onset captured gamma-ray energy spectrum is shown, with the horizontal axis representing the channel address, the left vertical axis representing the count, and the right vertical axis representing the peak significance. The delayed-onset captured gamma-ray energy spectrum is peak-searched using an optimized symmetric zero-area transform peak-searching algorithm to determine multiple characteristic peaks in the delayed-onset captured gamma-ray energy spectrum.

[0136] Fig. 9 A structural block diagram of a system for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown.

[0137] like Fig. 9 As shown, Fig. 9 The invention shows a system for deep-sea in-situ detection of signals based on the neutron capture principle, including a neutron source, a LaBr3 detection array, a front-end module and a data processing module. The neutron source emits neutrons to the minerals to be detected in the seabed. After the minerals to be detected in the seabed receive the neutron rays, the manganese element and the neutrons in the neutron rays undergo a radiation capture reaction to generate delayed captured gamma rays. After receiving the delayed captured gamma rays, the LaBr3 detection array emits scintillation light to the silicon photomultiplier tube. The silicon photomultiplier tube converts the scintillation light signal into a current signal first, and then reads out, amplifies and temperature compensates the signal in the front-end module to obtain a voltage signal. In the data processing module, the voltage signal is subjected to waveform digitization, real-time data processing, data storage and system control, and the analysis of the energy spectrum of the delayed captured gamma rays is completed to obtain the detection result. Then, operations such as data uploading and command issuing are performed to control the operation and shutdown of the detector.

[0138] Fig.10 A structural block diagram of a device for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown.

[0139] like Fig.10 As shown, the deep-sea in-situ detection signal device based on the neutron capture principle and applied to a receiver in this embodiment includes: a generation module 1010 and an analysis module 1020 .

[0140] The generation module 1010 is used to generate a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray in response to receiving the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the atoms in the mineral to be detected in the seabed undergo a radiation capture reaction with the neutron ray after the mineral to be detected receives the neutron ray, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the mineral to be detected. The generation module 1010 can be used to perform the operation S210 described above, which will not be described in detail here.

[0141] The analysis module 1020 is used to perform energy analysis on the delayed capture gamma ray energy spectrum to obtain a detection result, wherein the detection result includes the target nuclide contained in the mineral to be detected. The analysis module 1020 can be used to perform the operation S220 described above, which will not be described in detail here.

[0142] According to an embodiment of the present invention, the generation module 1010 includes: a first conversion submodule, a first determination submodule, a second conversion submodule and a first generation submodule.

[0143] The first conversion submodule is used to convert the delayed-release captured gamma rays to generate a voltage signal corresponding to the delayed-release captured gamma rays.

[0144] The first determination submodule is used to determine a trapezoidal shaping algorithm corresponding to the signal characteristics from a plurality of candidate algorithms according to the signal characteristics of the voltage signal.

[0145] The second conversion submodule is used to convert the voltage signal using a trapezoidal shaping algorithm to obtain a trapezoidal voltage signal, wherein the voltage signal is an exponential pulse signal.

[0146] The first generating submodule is used to obtain energy information corresponding to the delayed-release captured gamma ray from the trapezoidal voltage signal and generate a delayed-release captured gamma ray energy spectrum.

[0147] According to an embodiment of the present invention, the first conversion submodule includes: a first generating unit, a first processing unit, a first analog-to-digital conversion unit and a first amplifying unit.

[0148] The first generating unit is used to generate a scintillation light signal corresponding to the delayed capture gamma ray according to the delayed capture gamma ray.

[0149] The first processing unit is used to convert and amplify the flashing light signal to generate an intermediate voltage signal, wherein the intermediate voltage signal is an analog signal.

[0150] The first analog-to-digital conversion unit is used to perform analog-to-digital conversion on the intermediate voltage signal to obtain a digital voltage signal.

[0151] The first amplifying unit is used to amplify the digital voltage signal to obtain a voltage signal.

[0152] According to an embodiment of the present invention, the first determining submodule includes: a first determining unit and a second determining unit.

[0153] The first determining unit is used to determine a mathematical model corresponding to the voltage signal according to a signal feature of the voltage signal.

[0154] The second determining unit is used to determine a trapezoidal shaping algorithm corresponding to the mathematical model from a plurality of candidate algorithms according to the mathematical model corresponding to the voltage signal.

[0155] According to an embodiment of the present invention, the analysis module 1020 includes: a second determination submodule, a first acquisition submodule and a third determination submodule.

[0156] The second determination submodule is used to determine the characteristic peak from the delayed capture gamma ray energy spectrum.

[0157] The first acquisition submodule is used to acquire the energy value of the characteristic peak corresponding to the channel address of the characteristic peak according to the pre-constructed calibration coefficient between the channel address and the energy value.

[0158] The third determination submodule is used to determine the nuclide of the mineral to be detected according to the energy value of the characteristic peak and to determine the metal element of the mineral to be detected according to the nuclide.

[0159] According to an embodiment of the present invention, the second determining submodule includes: a first smoothing unit, a first filtering unit and a first peak finding unit.

[0160] The first smoothing unit is used to smooth the delayed-release captured gamma-ray energy spectrum to obtain a smoothed delayed-release captured gamma-ray energy spectrum, wherein the smoothed delayed-release captured gamma-ray energy spectrum includes a shifted characteristic peak.

[0161] The first filtering unit is used to perform zero-phase filtering on the smoothed delayed-release captured gamma-ray energy spectrum to obtain a target delayed-release captured gamma-ray energy spectrum, wherein the target delayed-release captured gamma-ray energy spectrum represents an energy spectrum with smooth spectral lines and no characteristic peak shift.

[0162] The first peak-finding unit is used to perform peak-finding processing on the target delayed-release captured gamma-ray energy spectrum by using an optimized symmetric zero-area transformation peak-finding algorithm to obtain a characteristic peak.

[0163] According to an embodiment of the present invention, the first acquisition submodule includes: a first simulation unit, a first generation unit and a first acquisition unit.

[0164] The first simulation unit is used to obtain a standard energy spectrum by Monte Carlo simulation according to the size parameter information of the detection device, wherein the standard energy spectrum represents energy spectrum data with stable energy and frequency characteristics.

[0165] The first generating unit is used to generate a background energy spectrum based on the detection results of minerals with natural radioactivity without emitting neutron rays to the minerals to be detected in the seabed, wherein the background energy spectrum represents the energy spectrum data of the minerals with natural radioactivity obtained by direct measurement.

[0166] The first acquisition unit is used to acquire the calibration coefficient between the channel address and the energy value according to the standard energy spectrum and the background energy spectrum.

[0167] According to an embodiment of the present invention, the first acquisition unit includes: a first calculation subunit and a first acquisition subunit.

[0168] The first calculation subunit is used to calculate the correlation between the standard energy spectrum and the background energy spectrum according to the Gaussian peaks and spectral line features contained in the standard energy spectrum and the background energy spectrum respectively.

[0169] The first acquisition subunit is used to acquire a calibration coefficient between the predetermined energy value and the channel address according to the correlation between the standard energy spectrum and the background energy spectrum, wherein the calibration coefficient represents the corresponding relationship between the predetermined energy value and the channel address.

[0170] According to an embodiment of the present invention, any multiple modules in the generation module 1010 and the analysis module 1020 can be combined into one module for implementation, or any one of the modules can be split into multiple modules. Alternatively, at least part of the functions of one or more of these modules can be combined with at least part of the functions of other modules and implemented in one module. According to an embodiment of the present invention, at least one of the generation module 1010 and the analysis module 1020 can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application-specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation methods of software, hardware and firmware or in any appropriate combination of any of them. Alternatively, at least one of the generation module 1010 and the analysis module 1020 can be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function can be executed.

[0171] Fig.11 A block diagram of an electronic device for a method for deep-sea in-situ detection of signals based on the neutron capture principle according to an embodiment of the present invention is shown.

[0172] like Fig.11As shown, the electronic device according to an embodiment of the present invention includes a processor 1101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1102 or a program loaded from a storage part 1108 to a random access memory (RAM) 1103. The processor 1101 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a dedicated microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 1101 may also include an onboard memory for caching purposes. The processor 1101 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0173] In RAM 1103, various programs and data required for the operation of the electronic device are stored. Processor 1101, ROM 1102 and RAM 1103 are connected to each other via bus 1104. Processor 1101 performs various operations of the method flow according to the embodiment of the present invention by executing the program in ROM 1102 and / or RAM 1103. It should be noted that the program can also be stored in one or more memories other than ROM 1102 and RAM 1103. Processor 1101 can also perform various operations of the method flow according to the embodiment of the present invention by executing the program stored in the one or more memories.

[0174] According to an embodiment of the present invention, the electronic device may further include an input / output (I / O) interface 1105, which is also connected to the bus 1104. The electronic device 1100 may further include one or more of the following components connected to the I / O interface 1105: an input portion 1106 including a keyboard, a mouse, etc.; an output portion 1107 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 1108 including a hard disk, etc.; and a communication portion 1109 including a network interface card such as a LAN card, a modem, etc. The communication portion 1109 performs communication processing via a network such as the Internet. A drive 1110 is also connected to the I / O interface 1105 as needed. A removable medium 1111, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 1110 as needed, so that a computer program read therefrom is installed into the storage portion 1108 as needed.

[0175] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiment; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0176] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an apparatus or a device. For example, according to an embodiment of the present invention, the computer-readable storage medium may include the ROM 1102 and / or RAM 1103 described above and / or one or more memories other than ROM 1102 and RAM 1103.

[0177] The embodiment of the present invention also includes a computer program product, which includes a computer program, and the computer program contains program code for executing the method shown in the flowchart. When the computer program product is run in a computer system, the program code is used to enable the computer system to implement the deep-sea in-situ detection signal method based on the neutron capture principle provided by the embodiment of the present invention.

[0178] The computer program executes the above functions defined in the system / device of the embodiment of the present invention when it is executed by the processor 1101. According to the embodiment of the present invention, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0179] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 1109, and / or installed from a removable medium 1111. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0180] In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 1109, and / or installed from the removable medium 1111. When the computer program is executed by the processor 1101, the above functions defined in the system of the embodiment of the present invention are performed. According to the embodiment of the present invention, the system, device, means, module, unit, etc. described above can be implemented by a computer program module.

[0181] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A deep-sea in-situ detection signal method based on the neutron capture principle, characterized in that: include: In response to receiving a delayed capture gamma ray, a delayed capture gamma ray energy spectrum is generated according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the to-be-detected mineral on the seabed receives a neutron ray and atoms in the to-be-detected mineral undergo a radiation capture reaction with the neutron ray, the atoms that undergo a radiation capture reaction with the neutron ray are manganese atoms, and the manganese element composed of the manganese atoms is a predetermined anchor point for the deep-sea in-situ detection, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the to-be-detected mineral; Performing energy analysis on the delayed capture gamma-ray energy spectrum to obtain a detection result, wherein the detection result includes a target nuclide contained in the mineral to be detected; Wherein, the energy analysis of the slow-onset trapped gamma-ray energy spectrum to obtain the detection result includes: using an infinite impulse response filter to smooth the slow-onset trapped gamma-ray energy spectrum to obtain a smoothed slow-onset trapped gamma-ray energy spectrum, wherein the smoothed slow-onset trapped gamma-ray energy spectrum includes a shifted characteristic peak; performing zero-phase filtering on the smoothed slow-onset trapped gamma-ray energy spectrum to obtain a target slow-onset trapped gamma-ray energy spectrum, wherein the target slow-onset trapped gamma-ray energy spectrum represents an energy spectrum with smooth spectral lines and no shifted characteristic peaks; using an optimized symmetric zero area transform peak-finding algorithm to perform peak-finding processing on the target slow-onset trapped gamma-ray energy spectrum to obtain the characteristic peak, wherein the optimized symmetric zero area transform peak-finding algorithm is obtained by combining a symmetric zero area transform peak-finding algorithm with a Gaussian function polynomial, and according to the Gaussian function polynomial, the convolution processing in the symmetric zero area transform algorithm is converted into the form of an infinite impulse response filter.

2. The method according to claim 1, characterized in that In response to receiving the delayed capture gamma ray, generating a delayed capture gamma ray energy spectrum according to the delayed capture gamma ray comprises: Performing conversion processing on the delayed-release captured gamma ray to generate a voltage signal corresponding to the delayed-release captured gamma ray; According to the signal characteristics of the voltage signal, determining a trapezoidal shaping algorithm corresponding to the signal characteristics from a plurality of candidate algorithms; The voltage signal is converted by using the trapezoidal shaping algorithm to obtain a trapezoidal voltage signal, wherein the voltage signal is an exponential pulse signal; Energy information corresponding to the delayed-release captured gamma ray is acquired from the trapezoidal voltage signal to generate the delayed-release captured gamma ray energy spectrum.

3. The method according to claim 2, characterized in that The converting process of the delayed-release captured gamma ray to generate a voltage signal corresponding to the delayed-release captured gamma ray includes: generating a scintillation light signal corresponding to the delayed-release captured gamma ray according to the delayed-release captured gamma ray; Converting and amplifying the flashing light signal to generate an intermediate voltage signal, wherein the intermediate voltage signal is an analog signal; Performing analog-to-digital conversion on the intermediate voltage signal to obtain a digital voltage signal; The digital voltage signal is amplified to obtain the voltage signal.

4. The method according to claim 2, characterized in that: The step of determining a trapezoidal shaping algorithm corresponding to the signal feature from a plurality of candidate algorithms according to the signal feature of the voltage signal comprises: Determining a mathematical model corresponding to the voltage signal according to a signal characteristic of the voltage signal; According to the mathematical model corresponding to the voltage signal, a trapezoidal shaping algorithm corresponding to the signal feature is determined from a plurality of candidate algorithms.

5. The method according to claim 1, characterized in that The step of performing energy analysis on the delayed-emission captured gamma-ray energy spectrum to obtain a detection result includes: Determining the energy value of the characteristic peak corresponding to the channel address of the characteristic peak according to a pre-constructed calibration coefficient between the channel address and the energy value; According to the energy value of the characteristic peak, the nuclide of the mineral to be detected is determined, and the metal element of the mineral to be detected is determined according to the nuclide.

6. The method according to claim 5, characterized in that The method for constructing the calibration coefficient between the pre-constructed channel address and the energy value comprises: According to the size parameter information of the detection device, a standard energy spectrum is obtained by using Monte Carlo simulation, wherein the standard energy spectrum represents energy spectrum data with stable energy and frequency characteristics; In the case where no neutron rays are emitted to the minerals to be detected in the seabed, a background energy spectrum is generated based on the detection results of the minerals with natural radioactivity, wherein the background energy spectrum represents the energy spectrum data of the minerals with natural radioactivity obtained by direct measurement; According to the standard energy spectrum and the background energy spectrum, a calibration coefficient between the pre-constructed channel address and the energy value is obtained.

7. The method according to claim 6, characterized in that The step of obtaining a calibration coefficient between the pre-constructed channel address and the energy value according to the standard energy spectrum and the background energy spectrum includes: Calculating the correlation between the standard energy spectrum and the background energy spectrum according to the Gaussian peaks and spectral line features contained in the standard energy spectrum and the background energy spectrum respectively; According to the correlation between the standard energy spectrum and the background energy spectrum, a calibration coefficient between the pre-constructed channel address and the energy value is obtained, wherein the calibration coefficient represents the corresponding relationship between the energy value and the channel address.

8. A deep-sea in-situ detection signal device based on the neutron capture principle, characterized in that: include: A generation module, for generating a delayed capture gamma ray energy spectrum in response to receiving a delayed capture gamma ray according to the delayed capture gamma ray, wherein the delayed capture gamma ray is generated after the to-be-detected mineral on the seabed receives a neutron ray and the atoms in the to-be-detected mineral undergo a radiation capture reaction with the neutron ray, the atoms undergoing the radiation capture reaction with the neutron ray are manganese atoms, the manganese element composed of the manganese atoms is the predetermined anchor point for the deep-sea in-situ detection, and the delayed capture gamma ray energy spectrum contains energy information corresponding to each nuclide characterizing the to-be-detected mineral; an analysis module, for performing energy analysis on the delayed gamma-ray capture spectrum to obtain a detection result, wherein the detection result includes a target nuclide contained in the mineral to be detected, and performing energy analysis on the delayed gamma-ray capture spectrum to obtain a detection result, comprising: smoothing the delayed gamma-ray capture spectrum using an infinite impulse response filter to obtain a smoothed delayed gamma-ray capture spectrum, wherein the smoothed delayed gamma-ray capture spectrum includes a characteristic peak that is offset; performing zero-phase filtering on the smoothed delayed gamma-ray capture spectrum, A target delayed-fire captured gamma-ray energy spectrum is obtained, wherein the target delayed-fire captured gamma-ray energy spectrum represents an energy spectrum with smooth spectral lines and without shifted characteristic peaks; and the target delayed-fire captured gamma-ray energy spectrum is peak-searched using an optimized symmetric zero-area transform peak-searching algorithm to obtain the characteristic peak, wherein the optimized symmetric zero-area transform peak-searching algorithm is obtained by combining a symmetric zero-area transform peak-searching algorithm with a Gaussian function polynomial, and according to the Gaussian function polynomial, the convolution processing in the symmetric zero-area transform algorithm is converted into a form of an infinite impulse response filter.

9. An electronic device, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors execute the method according to any one of claims 1 to 7.

Images