1996results about "Nuclear radiation detection" patented technology

The present invention relates to the technical field of geotechnical engineering safety monitoring, and provides a geotechnical engineering safety monitoring method based on muon detection technology. The method comprises: arranging a plurality of muon detection devices around or inside a geological body to be observed to form an array, and measuring in real time the muon observation flux of multi-angle cosmic rays passing through said geological body; converting the muon observation flux into the density length, and obtaining the three-dimensional density length distribution of said geological body; and analyzing the stress, strain, and deformation. In the present invention, muon particles are used to perform geological detection of geotechnical engineering, and the muons are particles having extremely high penetration capability, and can penetrate through the thick layer of the earth, so that detailed information about the interior of the geotechnical engineering is provided. In addition, the present invention has the advantages of being free of vibration and electromagnetic noise interference, and can implement accurate and rapid dynamic monitoring of the geotechnical engineering. The present invention has a wide application prospect in the fields of geological exploration, mineral exploration, underground resource development, and the like.

A radiation imaging apparatus includes a pixel array including, in an imaging region where a plurality of pixels is arranged in a matrix, a detection pixel group in which a plurality of detection pixels is arranged in a row direction, and a control unit configured to control imaging. A grid having a stripe structure in which a radiation transmissive layer and a radiation absorption layer that are strip-shaped and extend in a first direction are alternately arranged in a second direction is disposed and can be used in the radiation imaging apparatus. The radiation imaging apparatus further includes a determination unit configured to determine whether a mode in which the imaging using signals from the detection pixel group is controlled is executable by the control unit, based on information about an angle between the row direction and the first direction.

The invention relates to the technical field of material detection, and discloses a material multi-modal X-ray foreign matter detection method, which comprises the following steps of: acquiring a transmission gray-scale time sequence array and a scattered photon energy spectrum distribution matrix output by a multi-modal X-ray acquisition system, generating a composite characteristic body through cross-modal characteristic interactive coding, constructing a material-contour associated nodal topology network, and obtaining a material-contour associated nodal topology network; simulating a foreign matter feature conduction path and outputting a correlation confidence value set, performing space-time dimension mapping transformation to generate a foreign matter-detection coupling prediction curved surface, calculating a sensitivity adjustment factor and generating a standardized coupling coefficient thermodynamic cloud chart, extracting a detection quantitative index set and dynamically matching the detection quantitative index set with a preset reference range; and when the indexes exceed the boundaries, generating a regulation and control scheme. According to the method, the accuracy, reliability and real-time performance of foreign matter detection are improved, and the detection requirements of complex scenes can be met.

The invention provides a self-adaptive dual-energy pulse X-ray detection system and a detection method. The self-adaptive dual-energy pulse X-ray detection system comprises a dual-energy X-ray emission module, a pulse modulation and high-voltage power supply module, a detector array and a self-adaptive control system, wherein the dual-energy X-ray emission module is in signal connection with the pulse modulation and high-voltage power supply module; the detector array is positioned on the opposite side of a detected object; and the self-adaptive control system is in signal connection with the pulse modulation and high-voltage power supply module. The self-adaptive dual-energy pulse X-ray detection system and the self-adaptive dual-energy pulse X-ray detection method have high penetrating power, and the problems of fuzzy recognition and generation of image blind areas can be effectively avoided.

The invention discloses a method and system for tunnel stratum monitoring and early warning based on cosmic ray muons, and the method comprises the steps: firstly obtaining an average value and a standard deviation of ground surface cosmic ray muon flux, and then collecting the tunnel cosmic ray muon flux of a to-be-monitored point in each preset time period in real time; based on the average value of the earth surface cosmic ray muon flux and the tunnel cosmic ray muon flux, a muon flux attenuation value in each preset time period is calculated, if the muon flux attenuation value in a certain preset time period exceeds a preset threshold range, it is judged that the stratum is suspected to change, an over-limit alarm is triggered, and the condition that the stratum is suspected to change is judged. The cosmic ray muon flux attenuation value is used as a monitoring index, the change of the cosmic ray muon flux attenuation value directly reflects the change of a stratum structure, complex geological investigation is not needed, and the muon detector is high in stability, long in service life and very suitable for tunnel stratum safety monitoring projects needing continuous and stable monitoring. And the accuracy and the reliability of a tunnel stratum monitoring result are obviously improved.

The invention discloses a planetary detection system and method based on Uda muons. The planetary detection system comprises a muon generation system and a muon detector system. Wherein the muon generation system is used for controlling the position, the posture, the shape and the structure of a target material placed on the surface of a space or a star according to a muon generation demand sent by the outside, and the target material generates muons under the action of high-energy cosmic rays; and the muon detector system is used for collecting, analyzing and processing the muon signals to obtain parameters of the to-be-detected area and a visual image result.

The invention relates to the technical field of X-ray detection, and discloses an X-ray detection method and detector for detecting various densities and materials, and the method comprises the steps: carrying out the penetration imaging of an X-ray beam through a double-layer TFT detector structure; forming a first common energy X-ray image on the first TFT imaging layer for X-rays penetrating through the detected object, and forming a first high-energy X-ray image filtered by the copper filter layer on the second TFT imaging layer; performing preprocessing to obtain a second ordinary energy X-ray image and a second high-energy X-ray image; performing dual-energy-domain feature extraction, and constructing an effective atomic number map and a material density map; and executing feature space clustering analysis and decision tree classification, and outputting a final detection result. According to the invention, the image information of different energy domains is effectively integrated, the recognition capability of a mixed material and a complex structure is enhanced, the service life of a TFT detector is prolonged, and the system operation cost is reduced.

The cloth bag pile construction method comprises the following steps that S1, a circle of positioning ribs are welded to a reinforcement cage every several meters, and a circle of positioning ferrule is installed on the basis of the welded positioning ribs; s2, geotechnical cloth is adopted for first-layer wrapping from bottom to top, the bottom is fixed to a positioning ferrule in a winding and wrapping mode, and iron wires are used for binding every designated interval; s3, a PE plastic film is adopted for second-layer wrapping from bottom to top, and adhesive tape is used for fixing every specified interval; and S4, geotextile is adopted for second-layer wrapping from bottom to top, the bottom is fixed to the positioning ferrule in a winding wrapping mode, iron wires are used for binding every specified interval, the geotextile is longitudinally connected in a lap joint mode, longitudinal joints of the geotextile and longitudinal joints of the first-layer geotextile are staggered, and installation of the geomembrane bag is completed. According to the construction method, loss of slurry can be effectively reduced, the bearing capacity and stability of the cast-in-place pile are guaranteed, and the construction method can be well applied to construction of the cast-in-place pile containing the karst cave or the soil cave.

A system may include one or more downhole tools, where a first downhole tool includes a pulsed neutron generator to emit neutrons into a borehole of a geological formation and one or more gamma-ray detectors to obtain a measurement of gamma-ray emissions, of a borehole environment, induced by the emitted neutrons. The system may also include data processing circuitry to determine a Sigma value associated with the borehole environment based on the measurement and determine elemental concentrations, excluding lithium, based on one or more gamma-ray energy spectra obtained via the one or more downhole tools. The data processing circuitry may also determine an elemental Sigma contribution of the elements other than lithium based on the elemental concentrations, determine a lithium Sigma contribution based on a difference between the Sigma value and the elemental Sigma contribution, and determine a lithium concentration within the borehole environment based on the lithium Sigma contribution.

A method and system for identifying formation porosity and formation lithology. The method may include disposing a PNL tool into a borehole that is disposed in a formation, emitting a neutron from a neutron source on the PNL tool into the formation, and capturing one or more gammas expelled from formation in response to the neutron from the neutron source to form a plurality of pulsed neutron logging (PNL) measurements in a log. The method may further include identifying a formation porosity and a formation lithology with an artificial neural network that at least partially incorporates the PNL measurements.

The invention relates to an underground geological structure imaging system based on azimuth gamma rays, belongs to the technical field of underground logging and geological exploration, and aims to enhance scarce or low-quality data through a multi-azimuth detector array and multi-modal data acquisition and fusion by utilizing a Transform architecture and a GAN (Gamma Area Network) and self-supervised learning, so that the imaging accuracy of the underground geological structure is improved. And a multi-head cross attention mechanism is combined to accurately identify a complex stratum. The system supports multiple tasks of lithology classification, fault prediction, abnormal stratum alarm and the like, realizes real-time and high-resolution imaging and safety early warning, and is suitable for scenes of oil and gas drilling, underground engineering and the like.

Systems and methods for annotating, also known as tagging, visually identifiable objects using natural language (i.e. spoken voice) are provided. More specifically, but not exclusively, this disclosure relates to systems and methods for tagging identified objects related to underground utilities and assets, and communication systems. Once tagged, data representing identified objects can be stored, transmitted, and / or mapped. In an exemplary embodiment, a utility service worker or other personnel may walk or drive around an area of interest using utility locating equipment or systems to collect data. As data is being collected, the user may visually identify utility related or other items using a laser pointer, and then use their voice to tag items of interest. A headset including a microphone may be provided for capturing the user's voice. Hardware and / or software may be provided for processing tagged items, and relating them to a specific location, and / or utility asset.

Disclosed is a nanosecond neutron analysis and associated particle imaging system (NNA / API) and gamma ray detector arrangement (arrangement) that uses associative element detection of titanium, iron and oxygen to determine concentrations of ilmenite or other minerals in extra-terrestrial bodies associated with He-3. The arrangement is used with a mobile carrier for mapping out concentrations of likely He-3 regions on the extra-terrestrial body.

The embodiment of the invention relates to the field of exploration or detection by applying nuclear radiation, in particular to a method for determining a uranium metallogenic area of a to-be-surveyed area, which comprises the following steps of: determining natural gamma logging data and energy spectrum logging uranium content data of the to-be-surveyed area; determining the positions of a plurality of drill holes of the to-be-surveyed area; obtaining a rock core sample of one of the determined drill holes; determining uranium contents at different depths according to the rock core sample; determining the relationship between the uranium content and the energy spectrum logging uranium content data of the drill hole and the relationship between the energy spectrum logging uranium content data and the natural gamma logging data so as to determine the relationship between the uranium content and the natural gamma logging data; and determining a natural gamma logging threshold value of the uranium metallogenic area so as to determine the uranium metallogenic area of the area to be surveyed. According to the method provided by the embodiment of the invention, the natural gamma logging threshold value of the uranium metallogenic area can be accurately determined, so that the uranium metallogenic area of the area to be surveyed can be accurately determined, and the exploration cost is greatly reduced.

The invention relates to the technical field of geological exploration and mine safety mining, in particular to a mine underground water-containing body detection method and system based on muon imaging, and the method comprises the steps: obtaining a background value of a work area muon flux based on a plurality of deployed muon detectors, and measuring and collecting data of the work area muon flux, the data comprises quantity change and deflection angle information of muons before and after passing through the substance; performing corresponding processing on the data to obtain data meeting certain conditions; and comparing the data meeting a certain condition with the background value to obtain a comparison result, and generating an evaluation result of the water-containing body according to the comparison result. Therefore, the problems of high detection cost, low detection precision, large environmental damage, low detection efficiency and the like of the mine water-containing body in related technologies are solved.

A longitudinally extending detector drill rod is connectable at each of its longitudinal ends to another drill rod in a drill string and is deployable, as part of the drill string, to a location below a surface of the earth for detecting cosmic ray muons that penetrate the surface of the earth. The detector drill rod comprises: a drill rod bore-defining surface that defines a longitudinally extending drill rod bore; and one or more muon sensors located in the drill rod bore, the one or more muon sensors responsive to muons interacting therewith.

The invention provides an information scanning method, device and system, and relates to the technical field of information scanning, and the method comprises the steps: receiving a scanning instruction which indicates a plurality of target channels needing to be scanned in a plurality of channels of a scanning region, and setting a plurality of marks in the scanning region, comprising a first mark for indicating a parking point and a second mark for indicating each of two end points of each channel, and the first mark is different from the second mark; in response to the scanning instruction, determining a parking point where the scanning equipment is currently located according to a first mark in an image acquired by a visual sensor installed on the scanning equipment; planning a target path according to the current parking point and the two end points of each target channel; and controlling the scanning equipment to start from the current parking point, and controlling the scanning equipment to drive according to the target path according to the second mark in the image in the driving process, so that the scanning equipment scans information of goods stored in each target channel.

A method for estimating porosity of a rock sample includes acquiring a calibrated digital image of the rock sample, extracting color and texture features from the digital image of the rock sample, and estimating the porosity of the rock sample using a model to evaluate the extracted color and texture features. The model is configured to correlate digital image color features and textural features with porosity.

The embodiment of the disclosure provides a ray inspection system, comprising: a ray source device (1) comprising a first fixed platform (11) and a ray source (10), the first fixed platform (11) being configured to support the ray source (10), the ray source (10) being configured to emit ray beams, the mounting position and / or mounting posture of the ray source (10) relative to the first fixed platform (11) being adjustable; the detection device (2) comprises a second fixing platform (21) and a detection assembly (28), the second fixing platform (21) is configured to support the detection assembly (28), the detection assembly (28) is configured to receive the ray beam, and the installation position and / or the installation posture of the detection assembly (28) relative to the second fixing platform (21) are / is adjustable; wherein the detection assembly (28) and the radiation source (10) are oppositely arranged along a first direction (x), and an inspection channel for an inspected object (6) to pass through is formed between the radiation source device (1) and the detection device (2).

The invention discloses a concept for improved position and orientation determination of a plurality of objects each marked with at least one optoelectronically detectable marker, in which holographic optical elements are introduced into two-dimensional flat markers, at which ambient light is reflected back with sufficiently high intensity even at high scattering angles relative to the surface normal of the two-dimensional flat markers.For this purpose, it is proposed to detect light reflected by holographic optical elements (HOE; 21, 22, 23) applied to the markers (20) in an optoelectronic sensor (32) and to generate a two-dimensional reflection image, and to detect, in an image processing device (34), on the basis of the spectrally resolved local intensity distribution of the two-dimensional reflection image detected by the optoelectronic sensor (32), differences between the reflection behavior of the optoelectronically detectable markers (20) of the current position and orientation of the plurality of objects (100; 200) and the reflection behavior of the optoelectronically detectable markers (20) in a reference configuration of the plurality of objects (100; 200), and to detect deviations in the overall configuration of the plurality of objects (100; 200) relative to the optoelectronic detection device (30) by evaluating the detected differences. determine.

The invention belongs to the technical field of food processing, and particularly relates to an X-ray intelligent foreign matter detection machine which comprises a detection box, an X-ray generator and an X-ray detector, and further comprises a feeding frame fixedly arranged on one side of the detection box, and a discharging opening is formed in one side of the top of the feeding frame; and the discharging frame is fixedly arranged on the other side of the detection box. The weight is accurately measured through the food weighing mechanism, so that the blowing dust removal strength is adjusted in a self-adaptive mode, the food packaging surface is effectively cleaned, and food is prevented from being damaged; meanwhile, the cooling mechanism monitors, regulates and controls the temperature in the detection box in real time, slows down aging of elements of the X-ray generator, reduces thermal noise of the detector and guarantees detection precision; moreover, the rotary detection mechanism is matched with rotary limiting to realize multi-angle detection, and foreign matter missing detection is prevented; in addition, the foreign matter marking mechanism and the alarm lamp can mark and prompt food with foreign matters in time, sorting treatment is facilitated, and the production efficiency and the product quality are improved.

The invention relates to a femtosecond gamma ray pulse generation device, which comprises a femtosecond order electron beam slice generation system, a cavity, a Compton scattering laser system and collimation equipment, and is characterized in that the femtosecond order electron beam slice generation system, the cavity and the collimation equipment are sequentially arranged along a first axis; the femtosecond-order electron beam slicing system is used for generating femtosecond-order electron beams with high-density slices, the cavity is used for providing an interaction cavity, and the Compton scattering laser system is used for generating pulse type laser. The pulse type laser and the electron beam with the high-density slices in the femtosecond order are subjected to Compton scattering in the interaction cavity so as to generate a gamma-ray pulse in the femtosecond order; the collimation device is used for carrying out collimation on the femtosecond order gamma ray pulse.

The invention discloses a method, a system, equipment and a medium for detecting shield stratum disturbance based on cosmic ray muons, which are used for respectively measuring muon information on the earth surface and underground of a shield construction area, and can be used for detecting the attenuation condition after the muons penetrate through the stratum. And calculating the average stratum density on each muon track according to the muon flux attenuation information. The stratum disturbance in the track direction is evaluated by comparing the stratum average density variable quantity of the same monitoring point position in the same track direction when excavation is just conducted and after excavation is conducted for a period of time, and if the stratum average density variable quantity in all the track directions is smaller than a preset threshold value, it is judged that no disturbance exists in the stratum; according to the method, the stratum disturbance can be accurately and visually detected, the method is not limited by the surface environment, the applicability is higher, the disturbance condition of the stratum above the whole tunnel can be detected, the detection range is larger, and nondestructive detection and disturbance early warning on the upper stratum during shield construction are achieved.

A method and systems for taking downhole measurements. The method may include selecting a pulsing scheme for taking one or more measurements using a pulsed neutron logging tool, selecting a neutron burst width for the pulsing scheme based at least in part on a neutron tube utilized by the pulsed neutron logging tool to form at least in part a neutron burst train, and selecting a decay window in which the one or more measurements are performed by the pulsed neutron logging tool. The method may further include selecting a starting time for a late gate in which the one or measurements are taken, disposing the pulsed neutron logging tool into a borehole, performing the neutron burst train with the pulsed neutron logging tool, and performing the one or more measurements with the pulsed neutron logging tool during the late gate.

The present invention discloses a radioactive geophysical data processing method and system based on a physical field attenuation model, which belongs to the field of radioactive geophysical data processing. First, outliers are screened, and a diffusion influence model is constructed by an inverse distance weighted method. The field value of the outlier can be naturally attenuated in space and integrated into the overall data field, avoiding the problem of outliers being ignored or over-smoothed in traditional methods. Kriging interpolation is combined to generate a smooth basic field of normal data, which realizes scientific modeling and precise interpolation of spatial correlation, and significantly improves the fitting accuracy of the data and the authenticity of the field value expression. Subsequently, the diffusion field of the outlier point is superimposed on the normal field, which not only retains the characteristics of the outlier point, but also ensures the smoothness and consistency of the field value. Finally, a contour smoothing model based on deep learning is used to optimize the comprehensive field to generate a smooth contour map with good visual effect, which overcomes the limitations of traditional interpolation methods and provides a solution for radioactive geophysical data processing.

The utility model provides an energy spectrum data reading circuit and an X-ray detector. The energy spectrum data reading circuit comprises an acquisition circuit, the acquisition circuit comprises a plurality of sub-channels, and each sub-channel is used for receiving a current pulse signal generated based on X-rays and generating a detection signal based on the current pulse signal; the trigger circuit is connected with the plurality of sub-channels and is used for responding to an over-threshold channel in the plurality of sub-channels, generating a global trigger signal and a channel gating signal and outputting the address of the over-threshold channel, and the over-threshold channel is the sub-channel of which the amplitude of the generated detection signal exceeds a preset threshold value; the multiplexer is connected with the plurality of sub-channels and the trigger circuit, and is used for selecting an over-threshold channel from the plurality of sub-channels according to a channel gating signal provided by the trigger circuit to output a detection signal; and the control circuit is connected with the trigger circuit of the acquisition circuit and the multiplexer, and is used for reading the detection signal output by the multiplexer and the address output by the trigger circuit in response to the global trigger signal from the trigger circuit.

A neutron generator with an ion source within a housing may be used for generating neutrons for neutron logging downhole in a wellbore. The ion source within the housing of the neutron generator may include a hot cathode, an ion source cylinder, a first grid separated from the ion source cylinder, and an extractor separated from the ion source cylinder, the extractor having a second grid.

The invention relates to a radiation scanning device and inspection equipment. The radiation scanning device (RS) comprises a chassis (10); the radiation source assembly (20) is arranged on the chassis (10); the arm support assembly (30) is connected with the chassis (10) or the radiation source assembly (20) and is used for forming a detection area; the detector assembly (40) is arranged on the arm support assembly (30) and is matched with the radiation source assembly (20) so as to scan and image a detected object (DO); wherein the height of the chassis (10) is adjustable.

The invention discloses a detector correction device and a ray inspection system. The detector correction device comprises a first supporting seat; the bearing component is installed on the first supporting seat and provided with a bearing face, the bearing face is configured to be provided with a strip-shaped detector, the detector and the radiation source are oppositely arranged so as to receive a ray beam from the radiation source, and the projection of the ray beam on the detector is in a straight line shape; the bearing component is configured to move along a first direction which is parallel to the bearing surface and is crossed with the length direction of the detector relative to the first supporting seat, and the bearing component is also configured to rotate around a rotating axis which is vertical to a second direction of the bearing surface relative to the first supporting seat, so that the strip-shaped detector is aligned with the ray beam; and the driving mechanism is arranged on the first supporting seat, is connected with the bearing component and is configured to drive the bearing component to move relative to the first supporting seat.

A method may use a core sampling system for collecting a core sample with a reference log of a first property. The method may use a wellbore logging system for recording uncalibrated well logs with a target log of the first property. The method may use a computer processor for obtaining an uncalibrated geological model, determining a bulk-shift depth correction based on a first cost function, forming a bulk-shifted log by applying the bulk-shift depth correction to the target log, identifying a plurality of log event pairs, determining, for each of the log event pairs, a local-shift depth correction based on a second cost function, forming a local-shift depth correction table from the local-shift depth correction for the log event pairs, and forming a calibrated geological model based, at least in part, on the uncalibrated geological model and the local-shift depth correction table.