127results about "Nuclear radiation detection" patented technology

The utility model relates to security door technical field especially relates to a kind of contraband security door detection device, including shell, blocking cross bar and drive assembly, the inside of shell is provided with stand, the outside of stand is provided with electromagnetic transmitter, the inside of shell is provided with electromagnetic receiver, the outside of stand is provided with rotating blocking cross bar, the top of shell is provided with detection camera, the side of shell is provided with partition wall and is divided into entrance side and exit side;The utility model is formed by shell and stand Rotary channel, and three sets of electromagnetic transmitter and electromagnetic receiver are set in channel to carry out repeated detection, reduce detection error rate, and the face is detected by detection camera at entrance, when there is dangerous personnel with dangerous cutter or detect that the personnel escape, personnel can be detected in shell, limit component is used to limit and stop rotating to blocking cross bar, personnel is locked in shell, prevent personnel escape or use cutter to suddenly rise and hurt person.

The application provides an X-ray image acquisition method, an electronic device and a medium. The method comprises the following steps: controlling a to-be-inspected object to pass through a scanning area of a security inspection device; when the to-be-inspected object passes through the scanning area, performing transmission irradiation on the to-be-inspected object by using at least two X-ray exit fans; and generating an X-ray image corresponding to each of the at least two X-ray exit fans based on the at least two X-ray exit fans after the transmission irradiation is performed on the to-be-inspected object, wherein the first X-ray image generated based on a first exit fan and the second X-ray image generated based on a second exit fan have different projection magnifications. The technical solution of the application can improve the efficiency of acquiring security inspection X-ray images.

The present disclosure provides a ray protection device and a radiation inspection system. The ray protection device comprises: a mobile bearing device, including a vehicle frame and a traveling device supporting the vehicle frame to drive the vehicle frame to travel in a first direction; and a protection wall, arranged on the vehicle frame and including a movable wall which is movable relative to the vehicle frame. The movable wall has a shielding position and a retracting position; at the shielding position of the movable wall, the protection wall has first projection area in a vertical plane parallel to the first direction; and at the retracting position of the movable wall, the protection wall has second projection area in the vertical plane, where the first projection area is larger than the second projection area.

To provide a data processing method for static computed tomography scanning and a device.SOLUTION: The data processing method for static computed tomography scanning includes: performing, in response to receiving a beam synchronization pulse signal, a time synchronization on N angle pulse signals and a time synchronization on N belt pulse signals by using the beam synchronization pulse signal, so as to obtain N synchronization angle pulse signals and N synchronization belt pulse signals, respectively (operation S210); generating N timestamps based on the N synchronization angle pulse signals and the N synchronization belt pulse signals, where the N timestamps correspond to N scanning imaging systems of a static computed tomography scanning device, respectively, and each of the N timestamps includes angle data and belt data (operation S220); and packaging beam data, detection data, the angle data, and the belt data corresponding to each of the N scanning imaging systems to obtain N data packets (operation S230).SELECTED DRAWING: Figure 2

Methods and systems are provided to learn and apply a mapping function from data representing concentrations of atomic elements in a geological formation (or other data corresponding thereto) to mineral component concentrations in the geological formation (and / or from mineral component concentrations to reconstructed elemental concentrations in the geological formation). The mapping function can be derived from a trained neural network (such as an autoencoder). The output of the mapping function can be used to determine estimates of one or more formation properties, such as formation matrix density, formation porosity, matrix Sigma, formation saturation, other formation property, or combinations thereof.

The invention relates to a method for extracting discrete neutron components (derived from photonuclear reactions between photons and at least one chemical element to be detected) from a neutron spectrum derived from photonuclear reactions obtained by irradiating a material comprising the at least one chemical element to be detected with a source of photons, at least one energy of the photons of the source being greater than the photonuclear reaction threshold of the chemical element to be detected, which method uses a multilayer and multichannel neural network having an architecture with a convolution stage and a deconvolution stage. The method comprises a preliminary step of training the neural network by supervised learning and a prediction step using the trained neural network.

A method of deploying a pulsed neutron logging tool. The method may comprise detecting natural gamma rays from the subterranean formation via one or more detectors of the pulsed neutron logging tool, broadcasting neutrons into the subterranean formation, and detecting neutron-induced gamma rays and natural gamma rays from the subterranean formation. The method may further comprise creating an inelastic spectrum, a capture spectrum, or a capture time decay from the natural gamma rays or the neutron-induced gamma rays, forming an inelastic yields, a capture elemental yields, or a formation sigma form the inelastic spectrum, the capture spectrum, or the capture time decay, creating a closure model from the inelastic yields and / or capture elemental yields and / or a formation sigma, and identifying a porosity, a mineral weight fraction, or a quality figure of merit from the closure model that quantifies geologic hydrogen reservoir quality.

This invention discloses a muon detector and a muon localization method and track reconstruction method, comprising a first scintillator layer, a second scintillator layer, and a third scintillator layer. The first scintillator layer includes multiple annular first scintillators stacked vertically in a cylindrical shape. The second scintillator layer includes multiple elongated second scintillators spirally and tightly wound around the outer wall of the first scintillator layer. The third scintillator layer includes multiple elongated third scintillators extending vertically, distributed circumferentially along the outer wall of the second scintillator layer. Compared with the prior art, this invention can improve the axial positioning accuracy of the muon detector, increase the detection range, and shorten the imaging time without increasing the complexity of the muon detector. Furthermore, it can perform geometric consistency discrimination for false triggering, crosstalk, or inconsistent combination events, thereby improving positioning stability and reliability.

This utility model discloses a remote gamma measurement device for logging while drilling. The remote gamma measurement device includes: a pressure-resistant cylinder, a mounting frame, a main control and power board, a gamma sensor, a metal shielding sleeve, a shielding layer, a first connector assembly, and a second connector assembly. The mounting frame is located inside the pressure-resistant cylinder; the main control and power board is located on the mounting frame; the gamma sensor is located on the mounting frame and electrically connected to the main control and power board, and the gamma sensor includes a photomultiplier tube and a NaI crystal; the metal shielding sleeve is fitted over the photomultiplier tube; the shielding layer is located inside the pressure-resistant cylinder and is used to shield the peripheral area of ​​the gamma sensor; the first connector assembly is located on the pressure-resistant cylinder and electrically connected to the main control and power board; the second connector assembly is located on the pressure-resistant cylinder and electrically connected to the gamma sensor. This utility model's remote gamma measurement device for logging while drilling can reduce the influence of external signals on the photomultiplier tube and improve the reliability of the remote gamma measurement device for logging while drilling.

This invention relates to the field of radiation measurement technology, specifically to an authentication method for encrypted radiation measurement. It addresses the problem that existing technologies lack mechanisms to effectively shield and minimize the disclosure of sensitive information while maintaining identification efficiency, making them unsuitable for application scenarios where privacy protection demands are increasingly prominent. The method includes obtaining irradiation image data of a reference item and a test item, scaling their sizes to N×N, and denoting them as D₁ and D₂ respectively; introducing a key matrix λ; obtaining encryption matrices α₁ and α₂ through matrix multiplication of λ with D₁ and D₂ respectively; obtaining an absolute difference matrix β; obtaining a hash matrix σ; when β(i,j)>μ(i,j), setting σ(i,j) to 1, indicating that at this position, the difference between the reference item and the test item has exceeded the maximum difference, and the difference index increases by 1; when β(i,j)≤μ(i,j), setting σ(i,j) to 0, indicating that there is no difference between the two items at this position; scrambling and reducing the dimension of the hash matrix σ to obtain a hash sequence denoted as F, and using the elements of the hash sequence and H as the final difference index to accurately determine the identity or legitimacy of the test item.

Embodiments of the present disclosure provide a CT imaging system, which relates to the field of ray scanning technologies. The CT imaging system includes: an imaging channel for placing an object to be imaged in an imaging process; M distributed X-ray sources arranged at intervals along a circumferential direction of the imaging channel, at least one distributed X-ray source including q target spots; N detectors arranged at intervals along the circumferential direction of the imaging channel, including a first sub-detector and a second sub-detector. The CT imaging system includes a plurality of imaging components, the imaging component includes at least one distributed X-ray source and at least one first sub-detector. In the same imaging component, the distributed X-ray source and the first sub-detector are arranged face-to-face in a radial direction of the imaging channel, target spots of the distributed X-ray source and at least a part of the first sub-detector are located in a same plane perpendicular to the first direction. At least one second sub-detector is provided on at least one side of at least one distributed X-ray source in the first direction.

In some examples, a method for generating an image retrieval system configured to rank a plurality of images of cargo from an image dataset in response to a query corresponding to an image of cargo of interest generated using penetrating radiation is disclosed. The method can involve obtaining a plurality of annotated training images comprising cargo, each of the training images being associated with an annotation indicative of a type of cargo in the training image, and training the image retrieval system by applying a deep learning algorithm to the obtained annotated training images. The training can involve applying a feature extraction convolutional neural network to the annotated training images, and applying an aggregated generalized mean pooling layer associated with image spatial information.

The application provides a source searching path planning method and device based on improved artificial potential field, and a storage medium, the method comprising: constructing an initial multi-source radiation field, reconstructing the initial multi-source radiation field, establishing an artificial potential field model, moving the robot according to the direction of the planned source searching path and measuring the signals of the radioactive sources along the path, if a maximum value point of the radiation intensity is detected in the multiple radioactive sources, adding an additional potential field at the position of the robot to obtain a new artificial potential field model, and obtaining the direction of a new source searching path based on the new artificial potential field model to search for the next radioactive source; the application changes the influence of the "proven hot spot" on the artificial potential field from gravity to repulsion, adds an additional potential field at the position of the robot to obtain a new artificial potential field model, so that the new artificial potential field model can guide the robot to smoothly leave the current radioactive source and start searching for the next radioactive source, and solves the problem that the traditional artificial potential field method will fall into a potential field trap in a multi-source environment.

This invention discloses a neutron analysis physics testing system and method, belonging to the field of nuclear physics testing technology. The system includes: a high-speed synchronous pulse generator for generating pulse signals with multiple modulation sequences; an ultrashort pulse neutron generator for emitting short pulse neutron rays with specified parameters onto a sample; a neutron detector for acquiring secondary neutron signals; a gamma detector for acquiring characteristic gamma signals generated by neutron-excited probes of the sample; a safety control module for controlling the operating state of the ultrashort pulse neutron generator; and a data processing device for real-time collection and summarization of neutron signals and characteristic gamma signals based on the timing of the pulse signals with multiple modulation sequences. This system reduces time window drift and measurement errors, and activates the ultrashort pulse neutron generator only when a gate signal allows, improving the accuracy, safety, and stability of geological physics parameter measurements.

The present disclosure relates to an inspection system and method. The inspection system includes: a ray source, configured to generate rays having different energies; a detector, configured to detect a signal when a ray emitted by the ray source acts on at least one cross section of an inspected object; and a processor, in communication connection with the ray source, configured to adjust an energy of the ray emitted by the ray source according to information representing a material parameter of at least one cross section of the inspected object. The embodiments of the present disclosure is capable of being applicable to radiation inspection of multiple types of inspected objects.

A marker device embodiment may include separate concentrically-oriented receive and transmit antenna elements coupled to an ASIC which includes electronics to receive an input signal at a first frequency from a transmitter, convert the input signal to a power supply to power the electronic circuit, generate, in response to the input signal, an output signal at a second frequency different from the first frequency, and provide the output signal, via the transmit antenna element, to an above-ground receiver for assistance in determining the location of a buried utility.

This invention discloses a method, system, equipment, and medium for mineralization prediction based on the relationship between alteration structures and spatial gamma fields, relating to the field of metal ore detection technology. The method includes: acquiring target geological data; locating the ore body based on the delineation of the ore body on borehole profiles, and then constructing spatially independent or continuous multi-view maps in three-dimensional space along the corresponding structural alteration zone to obtain an ore body model; preprocessing borehole gamma logging data and borehole spatial data, and constructing a spatial gamma field model based on the preprocessed data; combining spatial gamma field models of different levels with the ore body model in profile, and determining the relationship between alteration structures and spatial gamma fields based on the combination within different survey areas; analyzing the rock mass distribution of the target ore using the relationship between alteration structures and spatial gamma fields, and delineating the final location of the target ore. This invention can predict favorable mineralization locations based on the relationship between alteration structures and spatial gamma fields.

The invention relates to a landslide interface detection method and device. The detection method comprises the steps that detection data collected by a muon detector and outer surface data, collected by a topographic surveying and mapping device, of a landslide body are obtained; and based on a compressed sensing iterative reconstruction algorithm, processing the detection data and the outer surface data, and determining a landslide interface. The detection data acquired by the muon detector and the outer surface data, acquired by the topographic surveying and mapping device, of the landslide mass are combined at the same time, so that the adverse effect of the topography on data acquisition is reduced, and the basic accuracy and comprehensiveness of data for constructing the three-dimensional interface of the landslide mass are improved; through a compressed sensing iterative reconstruction algorithm, high-dimensional information is restored by using a small amount of data, the reliability of constructing a three-dimensional interface of a landslide mass is improved, and the accuracy of a detection result is improved.

The application discloses a qualitative identification method for thin-layer mudstone interlayer in volcanic rock, which comprises the following steps: firstly, determining a mudstone section stably existing in the whole area through core observation and logging data, and taking the mudstone section as a standard section; secondly, selecting three curves (a neutron logging curve, an acoustic time difference logging curve and a density logging curve) responding best to the mudstone, standardizing logging curves of the standard section and the volcanic rock section in the whole area, and determining the peak value and the distribution range of the logging curves; selecting sample points with the best effect in the mudstone section and the volcanic rock section, taking the acoustic time difference logging curve as the horizontal coordinate, and taking the neutron logging curve and the density logging curve as the vertical coordinate respectively to establish a logging interpretation chart, qualitatively determining the identification standard of the mudstone and the igneous rock, and predicting the mudstone interlayer in the volcanic rock in a single well according to the chart. The application solves the problem of qualitative identification of the thin-layer mudstone interlayer in the volcanic rock, and provides reliable technical support for the analysis of the remaining oil potential of the igneous rock.

This disclosure provides an object inspection system relating to the fields of object inspection, radiation scanning, security inspection, or other fields. The system includes: a transport device comprising a first transport mechanism and a third transport mechanism for transporting objects; a radiation scanning device comprising a second transport mechanism configured to transport objects from the first transport mechanism to a radiation scanning area and to the third transport mechanism; and a control device communicatively connected to the transport device and the radiation scanning device; wherein the transport device, the radiation scanning device, and the control device employ a unified communication protocol, and the transport device is configured to control the operation of the second transport mechanism via the control device. This disclosure also provides an object inspection method.

The present disclosure provides a method of identifying a material, including: detecting, in response to a radiation ray scanning a target object, a radiation ray signal using a plurality of detector modules (521, 1121) of a radiation detector, where the plurality of detector modules (521, 1121) are arranged at different positions and ray signal channels are independent of each other; calculating N ray indexes corresponding to a position of each of the detector modules (521, 1121) according to the radiation ray signal detected by each of the detector modules (521, 1121), where N is an integer greater than or equal to 1; and identifying a material of the target object according to index values of each of the ray indexes at different positions. The present disclosure further provides an apparatus of identifying a material. The apparatus is particularly adapted to detect backscattering rays.

Various methods and systems are provided for an emitter assembly for a cathode of an X-ray tube. In one example, an emitter assembly comprises a first end of a substantially flat emitter supported by two rods extending from a two-rod insulator assembly, and a second end of the substantially flat emitter supported by a compliant, single rod insulator assembly.

This application provides a rotary steering device for zero-blind-zone geological parameter measurement, relating to the field of engineering drilling technology. It includes a connecting section, an upper spindle, a lower spindle, and a drill bit connected in sequence. The connecting section houses a power supply and communication module. The upper spindle has a bushing with a rotary steering module mounted on it, and the lower spindle houses an azimuth gamma geological steering module. It also includes two transmission mechanisms. The first transmission mechanism comprises a first part and a second part, which generate an excitation magnetic field to electrically connect the power supply and communication module to the rotary steering module. The second transmission mechanism comprises a third part and a fourth part, which abut against each other to electrically connect the power supply and communication module to the azimuth gamma geological steering module. By using the second transmission mechanism to power and communicate with the azimuth gamma geological steering module, and using the first transmission mechanism to power and communicate with the rotary steering module, near-drill bit measurement capabilities are integrated into the rotary steering system, achieving closed-loop steering control, improving drilling accuracy, and ensuring wellbore trajectory quality.

The present disclosure relates to a sandstone thickness mapping method, system, electronic device and storage medium. The mapping method comprises: obtaining logging data of each well point in a preset area, and determining sandstone and mudstone lithological characteristic data according to the logging data; determining sandstone curve shape and sandstone thickness of each well point according to the sandstone and mudstone lithological characteristic data, and mapping a sedimentary facies pattern of the preset area through the sandstone curve shape and the sandstone thickness; converting the sedimentary facies pattern to a constraint plane for determining the trend change of a sedimentary facies belt in a three-dimensional geological framework model plane range; generating plane sandstone thickness data through the constraint plane based on a geostatistical stochastic simulation algorithm, and mapping a sandstone thickness map of the preset area according to the plane sandstone thickness data. The sandstone thickness is generated by combining the geological statistical principle and the sedimentary facies pattern, and the sandstone thickness map is mapped according to the sandstone thickness, so that high-precision prediction and visual expression of the sandstone thickness are realized.

This invention discloses a technetium tracer for oilfield logging and its preparation method, belonging to the technical field of isotope tracer logging and radioactive tracer material preparation for oilfield water injection development. The method involves constructing composite particles from chitosan and nano-hydroxyapatite, and then combining them with a polyacrylic acid / acrylic acid system to form a gel precursor. This precursor is then subjected to irradiation crosslinking, freeze-drying to create pores, and pulverization and sieving to obtain porous composite carrier particles. Subsequently, the particles are leached with sodium chloride solution. 99 Mo- 99m Tc generator obtains Na 99m The TcO4 eluent was mixed with the carrier at a predetermined volume ratio, loaded, dried, and sieved to obtain technetium (TcO4). 99m Tc) tracer finished product. This tracer has a half-life of approximately 6.02 hours. 99m Tc balances well logging detectability and operational timeliness, reduces the duration of radioactive contamination of wellbore and instruments and environmental risks, improves the stability and repeatability of water injection profile tracer logging results, and is suitable for stratified water absorption evaluation and dynamic monitoring of water injection wells.

Used textile articles such as work coats (11) must be freed from foreign bodies before being treated in laundries. This has previously been done manually. This is time-consuming and in itself entails a risk of injury to the persons (25) freeing the work coats (11) from foreign bodies. According to the invention, the work coats (11) are inspected by x-raying. The x-ray radiation is shielded or reduced by x-raying in a chamber (29) or spatially sufficiently remote from the persons (20, 25) so that the persons (20, 25) are not exposed to impermissibly high levels of radiation.

A control method and apparatus for a conveying system, an electronic device, a readable storage medium, and a conveying system. The control method comprises: in response to goods entering a security i