59 results about "Muon detector" patented technology

The invention relates to the field of muon detection, in particular to a cosmic ray muon-based detection method for shield tunneling machine tunnel construction, which is used for detecting an internal geologic structure of a tunnel construction area when a shield tunneling machine performs tunnel construction. The detection method comprises the following steps: constructing a three-dimensional geological model of an area where tunnel construction is located according to geological data of the area where the tunnel construction is located; simulating the process that muons penetrate through the three-dimensional geologic model to obtain expected muon attenuation; acquiring first actual measurement muon data acquired by the muon detector, and determining actual measurement muon attenuation according to the first actual measurement muon data; and based on the actually measured muon attenuation amount and the expected muon attenuation amount, determining the internal structure information of the area where the tunnel construction is located. When the shield tunneling machine is used for tunnel construction, the internal structure of the area where the tunnel construction is located can be determined in real time, and the density abnormal area of the area where the tunnel construction is located can be effectively recognized and positioned.

The invention provides a muon detector for measuring soil moisture, and belongs to the technical field of testing by utilizing wave or particle radiation. The muon detector comprises a tubular scintillator which is used for detecting muons in cosmic rays and emitting scintillation light, and at least two outer optical fibers which are equal in screw pitch and used for collecting and transmitting the scintillation light are spirally wound on the periphery of the tubular scintillator. At least two inner optical fibers which are equal in screw pitch and used for collecting and transmitting scintillation light are spirally arranged on the inner circumference of the tubular scintillator, and the rotation direction of each inner optical fiber is opposite to that of each outer optical fiber, so that the tubular scintillator is divided into a plurality of latticed detection units in the internal and external directions. Compared with the prior art, the latticed detection unit is smaller, the existing scintillation light signal can only be acquired by the outer optical fiber, the scintillation light signal can also be acquired by the inner optical fiber, the optical fiber closer to the optical fiber can be acquired by the optical fiber, and the inner optical fiber and the outer optical fiber form an acquisition network, so that the detection precision is higher.

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.

The invention discloses a shield tunnel detection method based on natural ray muons, and relates to the technical field of shield tunnel detection, and the method comprises the steps: construction early warning, which is used for early warning stratum density abnormity; the accurate scanning is used for delineating an abnormal area; the construction quality control is used for ensuring proper measures; the construction early warning step specifically comprises the steps of obtaining ground contour information and muon detector position information, and performing forward modeling to obtain a theoretical muon survival rate; calculating an actual muon survival rate; comparing the theoretical muon survival rate with the actual muon survival rate, and calculating the difference significance of the two; if the saliency is smaller than the target threshold value, the shield tunneling machine continues to conduct tunneling forwards till the project is completed; and if the saliency is greater than the target threshold value, indicating that the stratum in the region has density abnormity, and giving out early warning by the system. The method does not use an artificial ray source, has the characteristics of non-invasion and capability of penetrating through a large-scale structure, and is very suitable for detection of an over-excavation area of a tunnel scene.

A method for modelling a block cave mine comprising: at each of a plurality of spaced apart muon detection locations located in, or in a vicinity, of the block cave mine: detecting muons that interact with a muon detector over a time period; determining, from the interactions, measured directional muon intensities for a plurality of directions intersecting at the muon detection location; and optimizing an objective function to thereby obtain optimal values for a plurality of model parameters which parameterize a model of the block cave mine, wherein the objective function attributes cost to a difference between the measured directional muon intensities at the plurality of muon detection locations and modelled directional muon intensities at the plurality of muon detection locations, the modelled directional muon intensities based at least in part on the model parameters.

The invention discloses a muon track reconstruction method and imaging method based on a muon detector, and the method comprises the following steps: S1, according to the numbers of a first scintillator, a second scintillator and a third scintillator hit by the muon in any muon breakdown event, determining the number of the first scintillator, the number of the second scintillator and the number of the third scintillator; determining azimuth angles of the first scintillator, the second scintillator and the third scintillator hit by the muon; s2, according to the azimuth angle of the first scintillator hit by the muon, the x-axis coordinate value and the y-axis coordinate value of the incidence point and the emergence point of the muon are determined; according to the azimuth angle of the second scintillator hit by the muon and the azimuth angle of the third scintillator hit by the muon, respectively determining z-axis coordinate values of an incidence point and an emergence point of the muon; and S3, determining the track of the muon according to the x-axis coordinate value, the y-axis coordinate value and the z-axis coordinate value of the incidence point and the emergence point of the muon. Compared with the prior art, the method has the advantages that the accuracy of z-axis positioning is remarkably improved while high detection efficiency is kept, so that the accuracy of muon track reconstruction and ore body imaging is improved.

The invention discloses an engineering cavity detection and grouting method and device, electronic equipment and a storage medium, and the method comprises the steps: setting detection point coordinates according to a position point where a cavity is located, and for each detection point coordinate, carrying out the detection of an overlying layer of the detection point coordinate through a preset measurement tool, and obtaining the standard thickness of the overlying layer; detecting the top and the bottom of the overlying layer of the coordinates of the detection point through a muon detector to obtain muon data, the muon data including incident muon flux and receiving muon flux; calculating a cavity height corresponding to the coordinates of the detection point according to the standard thickness, the muon data and a material parameter corresponding to each geological layer in the overlying layer; calculating the volume of the cavity according to the coordinates of the detection points and the height of the cavity; and grouting the cavity according to the volume of the cavity. The volume of the underground cavity is detected on the basis of the muon attenuation characteristic and the change of muon flux, the height of each cavity can be calculated more accurately, the accuracy and efficiency of cavity volume detection calculation are improved, and detection equipment is simple and convenient to operate.

The invention discloses a muon detector with variable scintillator spacing, which comprises a supporting base, and a bottom plate is arranged at the upper end part of the supporting base; the lower-layer detection part is fixedly arranged at the end part of the bottom plate, a multi-stage mechanical telescopic mechanism is arranged on the bottom plate, and an upper-layer detection part is arranged at the end part of the multi-stage mechanical telescopic mechanism; the main control data acquisition system is electrically connected with the multi-stage mechanical telescopic mechanism, the upper-layer detection part and the lower-layer detection part, and is used for setting and acquiring a distance value between the upper-layer detection part and the lower-layer detection part; and calculating according to the collected real-time spacing value, and performing corresponding data correction and image reconstruction according to the effective detection range and the optimal detection area under the current configuration. According to the method, the spatial resolution and the counting rate can be dynamically adjusted, so that the performance limitation caused by a fixed spacing design is broken through, and the comprehensive efficiency in a complex detection task is remarkably improved.

The invention discloses a muon detector. A steel frame seat, a power supply, a muon receiving converter and a data receiving and processing device are arranged in a shell; the muon receiving converter is mounted on the steel frame seat and comprises a platy scintillator and a photomultiplier plate wrapping one surface of the scintillator; the data receiving and processing device comprises a trigger device, the front end of the trigger device is connected with a photomultiplier through a preamplifier, the rear end of the trigger device is connected with an analog-to-digital converter and a time-to-digital converter, and the analog-to-digital converter and the time-to-digital converter are connected with the central processing unit through data lines. A buffer memory is arranged on a connecting line of the analog-to-digital converter and the central processing unit; the power supply supplies power to the muon receiving converter and the data receiving and processing device through cables; and a display screen connected with the central processing unit is arranged on the shell. According to the invention, rock stratum changes and secondary disasters can be monitored in real time, dynamic and accurate three-dimensional data are provided for rescue workers, it is ensured that a rescue channel can be constructed quickly and effectively, and a rescue scheme can be adjusted in real time.

The invention provides a muon detector scintillator self-checking method, and relates to the field of muon detectors, and the method comprises the steps: constructing a muon scintillator self-checking model, and determining the number of actually measured muons through the muon scintillator self-checking model; introducing a solid angle correction factor, and correcting the actually measured muon number to obtain a geometrically corrected muon number; and calculating an average value and a variance of the muon number after geometric correction, and obtaining a scintillator self-inspection result of the muon detector in combination with an anomaly evaluation function. The technical scheme of the invention is suitable for health monitoring in the field long-term detection operation process of the scintillator, and can find the abnormality of the scintillator in time, thereby avoiding the waste of detection time, and improving the reliability of data.

A flexible muon detector for inspecting an object has: a continuous scintillator film (102) for detecting incident muons by generating photons; photomultipliers (104) discretely distributed across a face of the continuous scintillator film, which are configured to optically connect to the continuous scintillator film. The discrete photomultipliers (104) are arranged to detect the generated photons and generate corresponding electrical signals; and flexible electronics (106) electrically connected to the photomultipliers so as to receive the generated electrical signals.

The present invention relates to a modular energy threshold muon detector (101 ) for monitoring soil density and / or permeability comprising at least two muon passage position detection modules (5), each muon passage position detection module (5) comprising a pair of scintillating elements (9) consisting of two segmented plates (9) placed one on top of the other, each segmented plate (9) comprising a plurality of scintillating bars (8) positioned in such a way that the scintillating bars (8) of one of the two segmented plates (9) are rotated by 90° with respect to the scintillating bars (8) of the other plate (9), each scintillating bar (8) comprising at least one silicon photomultiplier (21 ) positioned at an end face (71 ) of said scintillating bar (8), an outer casing (1 ) adapted to contain said at least two muon passage position detection modules (5), arrangement means configured to arrange said at least two muon passage position detection modules (5) in respective positions selectable from a plurality of positions inside said outer casing (1 ). The present invention also relates to a system for monitoring soil density and / or permeability.

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.

The invention relates to an intelligent water level control device and method based on cosmic ray muon flux. The device comprises a muon detector, a liquid level meter, water level adjusting equipment and a central processing unit which is in communication connection with the muon detector, the liquid level meter and the water level adjusting equipment. The central processing unit executes a closed-loop control process, firstly sets a target water level, controls the adjusting equipment, regulates the target water level according to feedback of the liquid level meter, then collects and monitors real-time muon flux data, judges whether collection meets preset conditions or not, sets a next target water level if the collection meets the preset conditions, regulates and controls the next target water level repeatedly, and monitors continuously if the collection does not meet the preset conditions until a preset measurement sequence is completed. According to the invention, a data acquisition system and a water level control system are integrated, accurate water level regulation and control are realized, dynamic decision is made through a muon flux monitoring result, dynamic coupling feedback of data acquisition and water level control is achieved, data acquisition sufficiency can be automatically judged, a measurement state can be intelligently switched, water depth-flux model experiment efficiency and automation level can be improved, and the water level can be accurately controlled. And the requirements of active control variables and intelligent experiments are met.

The present invention relates to a modular energy threshold muon detector (101 ) for monitoring soil density and / or permeability comprising at least two muon passage position detection modules (5), each muon passage position detection module (5) comprising a pair of scintillating elements (9) consisting of two segmented plates (9) placed one on top of the other, each segmented plate (9) comprising a plurality of scintillating bars (8) positioned in such a way that the scintillating bars (8) of one of the two segmented plates (9) are rotated by 90° with respect to the scintillating bars (8) of the other plate (9), each scintillating bar (8) comprising at least one silicon photomultiplier (21 ) positioned at an end face (71 ) of said scintillating bar (8), an outer casing (1 ) adapted to contain said at least two muon passage position detection modules (5), arrangement means configured to arrange said at least two muon passage position detection modules (5) in respective positions selectable from a plurality of positions inside said outer casing (1 ). The present invention also relates to a system for monitoring soil density and / or permeability.

A method and system for non-invasive archaeological investigation of pyramid structures are disclosed. The method combines high-resolution three-dimensional seismic acquisition with Marchenko-based wavefield reconstruction and multiple-reflection imaging to detect and characterize subsurface features such as voids, tunnels, and hidden chambers beneath and around pyramids. Electromagnetic vibrators, generate compressional and shear waves without ground penetration, and three-component (3C) receiver nodes, optionally equipped with over-under muon detectors, record seismic and muon flux data simultaneously. The Marchenko method enables reconstruction of virtual internal sources and receivers, while multiple-reflection imaging provides information from deeper layers below the pyramid base. The invention offers a fully non-invasive, high-resolution, and reversible approach suitable for cultural heritage preservation.

A borehole muon detector for muon radiography or geotomography is provided, the borehole muon detector including a substantially cylindrical housing, which defines a bore, a pair of end caps, each end cap sealing an end of the cylindrical housing and a plurality of sealed drift tubes which are longitudinally disposed in the bore of the housing to form a bundle of drift tubes, wherein each sealed drift tube comprises: a centrally located anode wire disposed on a longitudinal axis; an inner surface which is coated with a cathode coating, the cathode coating divided into a first cathode pad and a second cathode pad by a Vernier pattern; and a timer in electrical communication with the anode wire for measuring a drift time. A system and a method are also provided.

The present application relates to a method, device, equipment, and storage medium for monitoring the operating state of a nuclear facility. The method includes: a neutrino detector collects neutrino information released by the nuclear facility to be monitored, a first muon detector collects first muon information emitted by a muon ray source to the nuclear facility to be monitored, a second muon detector collects second muon information emitted by the nuclear facility to be monitored, and a processing device determines the operating state of the nuclear facility to be monitored according to the particle information, where the particle information includes neutrino information and / or muon information; the muon information includes the first muon information and the second muon information. Using this method can solve the problem that obstacles affect the monitoring of the operating state of the nuclear facility.

The present invention discloses a tomographic processing method for mining areas based on borehole observation. Utilizing the principle that cosmic ray muons lose intensity after passing through matter, muon detectors are arranged in boreholes to observe muon intensity underground, thereby obtaining information on the distribution of material opacity at various locations underground with respect to zenith angle and azimuth. Through multi-borehole and multi-position depth measurements, a cross-coverage of muon observations of the observation area is formed, thereby establishing a density inversion solution equation, and ultimately solving the accurate three-dimensional density structure under the surface. The muon source used in the present invention is a natural source, and muons do not damage the observed object. The observable depth can reach up to a depth of one kilometer, and the existing boreholes in the mining area are fully utilized to provide a safety detection function, thereby ensuring safe production.

The application relates to a mountain stability evaluation method, device, computer equipment and storage medium, and relates to the technical field of mountain stability. The evaluation method comprises the following steps: dividing a mountain into a plurality of voxels; constructing an adjacency structure graph and a density field posterior probability distribution of the mountain, wherein the adjacency structure graph is constructed by muon data recorded by a muon detector arranged in a grotto, and the density field posterior probability distribution is a probability distribution of all density models of the mountain under the muon data and the adjacency structure graph; sampling from the density field posterior probability distribution according to the adjacency structure graph to obtain a plurality of density field samples of the mountain; obtaining a density value of each voxel according to the plurality of density field samples; and obtaining a stability abnormal area in the mountain according to the density values of the plurality of voxels. The mountain stability evaluation method can accurately determine the stability abnormal area in the mountain, and improves the accuracy of mountain stability evaluation.

The invention belongs to the field of geological exploration, and discloses a logging-while-drilling device based on the muon imaging technology. Comprising an outer shell, an inner cylinder and a muon detector, the inner cylinder is coaxially nested in the outer shell, and a relatively sealed detection space is formed between the inner cylinder and the outer shell; the muon detector is arranged in the detection space; the muon detector comprises a scintillator assembly and a photoelectric detector, the scintillator assembly is coaxially sleeved in the detection space, the photoelectric detector is arranged on the inner side of the scintillator assembly, the scintillator assembly is made of a scintillator material capable of resisting the high temperature of 140 DEG C or above, and a heat insulation layer is arranged on the inner wall of the detection space. The method can be widely applied to oil-gas exploration, mineral resource investigation and underground structure detection, and the detection depth and imaging precision of logging while drilling are improved.

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 invention relates to a mountain stability evaluation method and device, computer equipment and a storage medium, and relates to the technical field of mountain stability. The evaluation method comprises the following steps: dividing a mountain into a plurality of voxels; an adjacent structure diagram and density field posterior probability distribution of the mountain are constructed, the adjacent structure diagram is constructed through muon data recorded by muon detectors arranged in the grotto, and the density field posterior probability distribution is probability distribution of all density models of the mountain under the muon data and the adjacent structure diagram; sampling from the density field posterior probability distribution according to the adjacent structure diagram to obtain a plurality of density field samples of the mountain; obtaining a density value of each voxel according to the plurality of density field samples; and according to the density values of the voxels, obtaining a stability abnormal region in the mountain. According to the mountain stability assessment method, the stability abnormal area in the mountain can be accurately determined, and the accuracy of mountain stability assessment is improved.

A method and a system (101) for monitoring land traffic in an area (103) are disclosed. The method comprises positioning one or more muon detectors (120, 121) in and / or below the area (103), measuring muon flux time series data by the one or more muon detectors (120, 121), processing the muon flux time series data to detect motion in the area (103), determining a motion detection result based on the processing, and causing detonation of one or more explosives based on the motion detection result. The method and system can be particularly applied in the defense sector where the system (101) acts as trigger system for detonating the explosives of a land mine or an anti-tank mine.

A borehole muon detector for muon radiography or geotomography is provided, the borehole muon detector including a substantially cylindrical housing, which defines a bore, a pair of end caps, each end cap sealing an end of the cylindrical housing and a plurality of sealed drift tubes which are longitudinally disposed in the bore of the housing to form a bundle of drift tubes, wherein each sealed drift tube comprises: a centrally located anode wire disposed on a longitudinal axis; an inner surface which is coated with a cathode coating, the cathode coating divided into a first cathode pad and a second cathode pad by a Vernier pattern; and a timer in electrical communication with the anode wire for measuring a drift time. A system and a method are also provided.

The invention discloses a method and a system for measuring the height of a low-altitude aircraft based on muon detection, and the method comprises the steps: deploying a muon detector array on the aircraft for muon event detection, and obtaining the motion trail of muons and the zenith angle of the muons; performing flux calculation and angular distribution statistics on the motion trails of the muons and zenith angles of the muons to obtain muon flux and muon angular distribution characteristic values; and constructing a muon characteristic parameter and height corresponding relation model, matching muon flux and muon angular distribution characteristic values, and introducing external geographical environment parameters to perform inversion calculation to obtain an aircraft height value. According to the method, noise caused by rapid fluctuation of low-altitude atmosphere in muon detection can be suppressed, and the calculation precision of the height value of the aircraft is further improved. The method and system for measuring the height of the low-altitude aircraft based on muon detection can be widely applied to the technical field of flight height measurement.

The application discloses a muon detector, a three-dimensional photographic imaging method and device and a storage medium, wherein the muon detector comprises three detection planes and a lead plate which are arranged in parallel in sequence, and three acquisition plates; the lead plate is arranged between the second detection plane and the third detection plane; the detection plane is composed of a three-prism-shaped scintillator and a corresponding photoelectric sensor; the photoelectric sensor is connected with the acquisition plate; and the acquisition plate is used for acquiring the number of muons passing through an object and the number of muons in the sky. The muon detector of the application adds a layer of lead plate between the three detection planes, which can effectively shield gamma particles in the air, reduce background noise interference and improve imaging accuracy.

This invention discloses a muon track reconstruction method and imaging method based on a muon detector, comprising the following steps: S1, determining the azimuth angles of the first, second, and third scintillators hit by the muon in any muon penetration event; S2, determining the x and y coordinates of the muon's incident and exit points based on the azimuth angle of the first scintillator; determining the z-axis coordinates of the muon's incident and exit points based on the azimuth angles of the second and third scintillators; S3, determining the muon's track based on the x, y, and z-axis coordinates of the incident and exit points. Compared with existing technologies, this invention significantly improves the accuracy of z-axis positioning while maintaining high detection efficiency, thereby improving the accuracy of muon track reconstruction and ore body imaging.

The invention relates to a multi-data fusion muon imaging detection method and system, and belongs to the technical field of blast furnace detection imaging. The method comprises the following steps: collecting muon trajectory data penetrating through a blast furnace through muon detectors arranged around the blast furnace; spatial reconstruction is carried out based on the muon trajectory data, and a three-dimensional imaging model representing the internal density distribution of the blast furnace is constructed; obtaining multi-source observation data; wherein the multi-source observation data at least comprises thermal data and acoustic data; constructing a joint inversion objective function based on the multi-source observation data and the three-dimensional imaging model; solving the joint inversion objective function, and outputting state imaging distribution based on blast furnace three-dimensional imaging; wherein the state imaging distribution comprises material density distribution and temperature field distribution. By means of the mode, full-dimension and high-precision blast furnace internal state parameters can be obtained, and the defects that a traditional sensor is incomplete in single parameter coverage and insufficient in detection precision are overcome.

The invention belongs to the technical field of cosmic ray detection, and provides an LED track visualization device for playing muon detector examples, which comprises a cap-shaped nut, an acrylic lamp holder front panel, an acrylic strip group, a screw rod, a second nut, a fixed frame, an LED display circuit board with an embedded STM32 microcontroller, a flat screw, a fixed plate, a Raspberry Pi 4b computer and a Raspberry Pi protective cover. According to the invention, through the acrylic strip group, the LED display circuit board and the Raspberry Pi 4b computer, the data processing flow is simplified, real-time and visual case display is realized, and portability and operability are realized.