40 results about "Area detector" patented technology

A depth camera assembly (DCA) for multimode time-of-flight based depth sensing is presented herein. The DCA includes a projector, a detector, and a controller. The projector illuminates a target area with outgoing light comprising a plurality of light pulses. The detector includes an array of unit cells. Each unit cell includes a macropixel with a plurality of pixels that captures portions of the outgoing light reflected from the target area, and an array of memory cells coupled to the macropixel. At least one of the memory cells stores information about the captured portions of the reflected outgoing light received from the macropixel. The controller determines depth information for the target area based in part on data read from the at least one memory cell.

The invention discloses an unmanned aerial vehicle synchronous navigation and radio mapping method based on reinforcement learning and region adaptive integrated learning, and the method comprises the following steps: S1, constructing a radio environment, and carrying out region division according to geographical location information; the method comprises the following steps: S1, detecting a flight area of an unmanned aerial vehicle by adopting an area detector, S4, exploring an environment by the unmanned aerial vehicle through interactive learning, and simultaneously collecting and learning radio frequency data, S5, carrying out strategy training by adopting an experience pool jointly constructed based on actual experience and simulation experience, and S6, storing experience, calculating a return and updating a network. According to the unmanned aerial vehicle synchronous navigation and radio mapping method based on reinforcement learning and regional adaptive ensemble learning, through synchronous navigation and mapping, the unmanned aerial vehicle can be accurately navigated in an unknown or interference environment, meanwhile, a high-precision radio coverage map is established, and the method is particularly suitable for unmanned aerial vehicle communication and navigation tasks in a complex urban environment.

Optical coherence tomograph for examining an eye (3) which features: - a lighting device (4, 5) for providing source radiation, - an illumination and measurement beam path (7) comprising a splitting element (6) for splitting the source radiation into illumination radiation (B) and reference radiation (R), with the illumination radiation (B) illuminating an illumination field in the eye (3) and collecting backscattered illumination radiation in the eye (3) as measurement radiation (M), wherein the illumination and measurement beam path (7) comprises a scanner (13) for adjusting the lateral position of the illumination field in the eye (3) and a front optic (12), - a reference beam path (8) which provides for the reference radiation (R) an optical path length (21) corresponding to an optical path length from the splitting element (6) to the illumination field and back to a superposition point (71), - a detection beam path (14, 15, 17) which receives the measuring radiation (M) from the illumination and measuring beam path (7) and the reference radiation (R) from the reference beam path (8) and superimposes them at the superposition point (71) and directs them onto a detector (19), - the illumination and measuring beam path (7) further exhibits - a beam splitter (11) for separating the measuring radiation (M) collected by the eye (3) from the illumination radiation (B) directed to the eye (3), wherein the beam splitter (11) directs the separated measuring radiation (M) to the detection beam path (14, 15, 17), and - a light splitting element (32, 34) that splits the illumination radiation (B) into spots in order to illuminate the retina (2) with a multi-spot pattern, characterized in that - the lighting device (4, 5) is tunable with respect to the wavelength of the source radiation, - the detector is an area detector (19), - the detection beam path further - an optical element (14) acting only on the measuring radiation (M), which interacts with the front optics (12) and adjusts the numerical aperture with which measuring radiation (M) is collected in the eye (3), and - an aperture (15) which is arranged in front of the area detector (19), in or near an intermediate image plane and which defines the size of an object field from which the measuring radiation (M) reaches the area detector (19), and - wherein the aperture prior to the area detector is designed as a first multi-hole aperture (15) and a first multi-lens array (36) is arranged between this multi-hole aperture and the area detector (19), which focuses the radiation emanating from each hole of the first multi-hole aperture (15, 15a, 15b) onto a pixel area of ​​the area detector (19) which has a spatial resolution of 4 to 100 pixels in one direction, preferably as a 2D pixel area with 5 to 50 pixels or 5 to 40 pixels per direction.

According to the method for regulating and controlling the current density of the superconducting micron wire, the hole shape with a certain size is designed in the linear area of the winding superconducting micron wire, so that the current density of the superconducting micron wire is redistributed, the current density at the corner of the winding superconducting micron wire is reduced, and the current crowding effect of the superconducting micron wire is effectively relieved. According to the current density regulation and control method, the superconducting micron wire is allowed to work under higher overall bias current without causing too high dark counting, so that the photon counting rate upper limit of the detector is improved. According to the invention, the detection efficiency of the superconducting micron wire can be improved, dark counting and time jitter are reduced, the structure is simple, the current density is flexible to regulate and control, meanwhile, the device is easy to expand to the development of a large photosensitive area detector, and the device has a wide application prospect in the fields of quantum communication, bioluminescence imaging, dark substance detection and the like.

The present invention belongs to the field of infrared detector manufacturing technology and specifically provides a method for liquid phase epitaxy of HgCdTe material based on a patterned sapphire substrate. The method comprises: providing a sapphire substrate having a polished surface on one side and a nanoimprinted surface on the other, the nanoimprinted surface being imprinted with a regular hexagonal pyramid convex lattice structure; growing a CdZnTe transition layer on the surface of the regular hexagonal pyramid convex lattice structure using metal organic chemical vapor deposition (MOCVD); performing in-situ annealing after growth, and then placing the substrate in a liquid phase epitaxy system for liquid phase epitaxy of HgCdTe material on the CdZnTe transition layer. The sapphire substrate has high strength and will not crack during device fabrication or when subjected to high and low temperature shock during device operation. This method can reduce the defect density of the epitaxial material, improve material uniformity, and enable the production of large-area HgCdTe epitaxial materials, thereby meeting the requirements of third-generation infrared focal plane arrays for low-cost, large-area detectors.

The application provides a multi-geometry diffraction guiding device and an X-ray diffraction equipment, the device is used for guiding a diffraction beam to reach a target detector in the X-ray diffraction equipment; the device comprises: a shell, a parallel light path component and a quasi-focusing light path component; the parallel light path component and the quasi-focusing light path component are arranged on the inner side of the shell; the shell is provided with a mounting connecting part corresponding to the target detector; when the diffraction beam is a parallel beam geometry, the parallel light path component is configured to guide the diffraction beam to reach a first detection area of the target detector; when the diffraction beam is a quasi-focusing beam geometry, the quasi-focusing light path component is configured to guide the diffraction beam to reach a second detection area of the target detector. The application can realize fast and efficient mode switching to measure diffraction beams of different geometries, optimize the use efficiency of a large-area detector, and avoid or eliminate manual or mechanical intervention on optical devices during switching.

The present disclosure relates to a system for imaging. The system may include a supporting assembly and a detector assembly. The supporting assembly may include a detection region to accommodate a subject. The detector assembly may surround the detection region. The detector assembly may be configured to detect radiation rays emitted from the subject located within the detection region. The detector assembly may include a plurality of detector rings. Each detector ring may include a scintillator array and a plurality of photosensors. The plurality of detector rings may be arranged on the supporting assembly in an axial direction of the supporting assembly to form an axial field of view (FOV) having a length no less than 0.75 meters.

The invention provides a multi-geometric-configuration diffraction guiding device and X-ray diffraction equipment. The device is used for guiding diffraction beams to reach a target detector in the X-ray diffraction equipment. The device comprises a shell, a parallel light path component and a quasi-focusing light path component, the parallel light path component and the quasi-focusing light path component are arranged on the inner side of the shell; the shell is provided with a mounting connecting part corresponding to the target detector; when the diffracted light beam is in the parallel light beam geometrical configuration, the parallel light path component is configured to guide the diffracted light beam to reach a first detection area of the target detector; when the diffracted beam is in the quasi-focused beam geometry, the quasi-focused light path member is configured to direct the diffracted beam to a second detection area of the target detector. According to the invention, rapid and efficient mode switching can be realized so as to measure diffracted beams with different geometric configurations, the use efficiency of a large-area detector is optimized, and manual or mechanical intervention on an optical device during switching is avoided or eliminated.

This invention relates to a large field-of-view diversity receiver for underwater wireless optical communication, belonging to the field of underwater optical communication technology. It includes a top lens-detector module pointing vertically towards the zenith and four surrounding side lens-detector modules. The four side modules are evenly distributed along the circumference and have a uniform tilt angle relative to the zenith direction, causing the spatial fields of view of each module to partially overlap, thus synthesizing a large composite field of view. Each module consists of a defocused condenser lens and a photodetector. This invention avoids the trade-off between gain and field of view limitation of traditional single-lens receivers, relaxing communication alignment requirements while retaining the high-speed transmission advantage of small-area detectors. Combined with a signal combining algorithm, it can effectively combat underwater signal fading, making it suitable for underwater wireless optical communication systems.

The invention discloses a Compton scattering imaging device based on focusing collimation and a defect detection method. The Compton scattering imaging device comprises a ray source used for generating X-rays or gamma-rays with certain energy and angle distribution; the front collimator is used for collimating rays output by the ray source to form a beam to perform point-by-point scanning on a measured object; the rear collimator with the focusing structure is formed by splicing a plurality of focusing collimation structures which are distributed and arranged, effective light-passing axes of the focusing collimation structures are converged in the same focusing area, and the rear collimator with the focusing structure is used for receiving scattering signals generated in the effective light-passing axis direction within the range of the focusing area with the set depth of the measured object; the focusing area covers the scanning point; the large-area detector is used for receiving the scattering signal output by the rear collimator and converting the scattering signal into an analog electric signal; and the electronics acquisition system is used for receiving the analog electric signal, converting the analog electric signal into a digital signal, processing the digital signal and transmitting the processed digital signal to the upper computer to generate an internal structure image of the measured object. According to the invention, the spatial resolution capability is greatly improved.

The invention discloses a PEMFC reversible attenuation on-line monitoring and recovery device and method, the device comprises a parameter adjusting module, a controller, a multi-area detector and a battery, the parameter adjusting module, the controller and the multi-area detector are connected in sequence; the parameter adjusting module comprises an air compressor, a humidifier and a fan, a three-dimensional reversible attenuation model is arranged in the controller, the air compressor, the humidifier and the fan are respectively connected with the controller and the battery, and the battery is connected with the multi-area detector. Through the PEMFC three-dimensional reversible attenuation model, the ECSA and conductivity of different areas under different initial conditions and operation time are rapidly calculated, the PEMFC electrical performance is subjected to refined real-time detection and recovery, and the cost of refined detection is greatly reduced.

High-resolution microscopy method for the three-dimensional position determination of objects, in particular individual fluorophores, preferably for spatially high-resolution luminescence microscopy of a sample (7) which is labelled with labeling molecules (1) which can be activated or switched with a signal such that they can only be excited to emit certain luminescence radiation in the activated state, wherein the method comprises the following steps: a) Introducing the signal onto the sample (7) such that only a subset of the labeling molecules (1) present in the sample (7) are activated, wherein the sample (7) contains subregions in which activated labeling molecules (1) are at least as far apart from the nearest neighboring activated labeling molecules (1) as is greater than or equal to a length which results from a predetermined optical resolution, b) Excitation of the activated molecules (1) to emit luminescence radiation, c) Detection of the luminescence radiation with the predetermined optical resolution, and d) Generating a single image from the luminescence radiation recorded in step c), wherein the geometric locations of the luminescence-emitting labeling molecules are determined with a spatial resolution increased above the predetermined optical resolution, where the steps are repeated several times and the resulting individual images are combined to form a complete image, characterized by the fact that an object is imaged via an imaging system (OB, TL) with a microscope objective (15, OB) onto an area detector (5, CCD) consisting of individual detector elements, wherein at least one microlens arrangement (ML, ZL), which is partially located in front of the detector elements, images a different object plane (OE1) onto the detector elements in the direction of light behind the microlenses than onto detector elements in front of which there are no microlenses.

A video encoder for encoding data for machine consumption includes an area detector selection module that receives source video and detector selection parameters and selects an object detector model. The region detection module applies the selected model to the source video to identify a region of interest in the source video. A region extractor module extracts the identified region from the source video, and a region encapsulation module encapsulates the extracted region into an encapsulated frame excluding pixels outside the region of interest. A video encoder receives the encapsulated frame and data related to the region parameters required to reconstruct the frame, and generates an encoded bitstream. The encoder and the encoding method also include region filling and region merging, and region segmentation processing. Compatible decoders and bitstreams are also provided.

The present invention discloses a μBq / cm 2 Level 210 Po activity detection device, belonging to the field of radionuclide detection technology, is used for detecting radionuclides on the surface of materials in low background experiments. 210 Highly sensitive detection of Po activity. This system includes a glove box, sample chamber, SiPIN detector array, electronics box, and vacuum system. The glove box is purged with nitrogen to maintain a low-radon environment. The sample chamber is sealed with a KF200 flange and connected to a vacuum pump. Nine SiPIN detectors are arranged in parallel in a 3×3 array, with a total sensitive area of ​​29.2 cm. 2 The electronics box integrates an amplifier circuit based on LMH6629, replacing the commercial preamplifier module. Through the collaborative design of multiple small-area detectors in parallel, a closed low-background environment and self-developed electronics, a single-day 210 Po activity detection sensitivity ≤ 1μBq / cm 2 , background ≤ 3cpd, suitable for surface contamination monitoring in neutrino and dark matter detection experiments.

The disclosure provides a low-orbit neutron and gamma-ray detector group, a detection device and a detection method. The detection device is a small-volume, small-mass, low-power and high-speed neutron / gamma spectrometer based on a multi-layer single / dual sensitive area Si detector and a cadmium zinc telluride (CZT) detector array. The neutron / gamma spectrometer can be carried on a small satellite as an independent load to measure thermal neutrons, fast neutrons below 20 MeV and gamma rays. The cooperation between different layers of the detector group in the detection device forms multiple anticoincidence groups, improving the accuracy of energy spectrum inversion. The detection method proposes a pile discarding algorithm, thereby avoiding the interference caused by signal overlap and improving the system resolution of the entire neutron / gamma spectrometer.

A light sheet microscope for illuminating a sample arranged in an object plane on a sample carrier, comprising: an illumination device having an objective for illuminating the sample via an illumination beam path with a first light sheet, which intersects the sample volume in a first light sheet plane, the first light sheet plane intersecting the object plane at a skew first illumination angle (α), and a detection device for imaging of light coming from the sample, having an objective, the focal plane lying in the sample volume parallel to or in the object plane, and an area detector having a detector plane. The area detector includes a first slit stop in the detection beam path upstream of the area detector so as to mask out such regions of the sample volume which are illuminated by the first light sheet but lie outside the focal plane of the detection objective.

An image processing apparatus includes an area setter configured to set a target area in a first image among a plurality of captured images acquired by imaging at different time from each other, an area detector configured to detect a corresponding area relevant to the target area in a plurality of second images among the plurality of captured images, a focus state acquirer configured to acquire focus states of the target area and the corresponding area, and a classification processor configured to perform classification processing that classifies the plurality of captured images into a plurality of groups according to the focus states.

Metrology apparatus comprises: an illumination module; and an interferometer module. The interferometer module comprises: a beam splitter for forming measurement and reference radiation; first optics for: projecting the measurement radiation onto the object; and collecting measurement radiation reflected from the object; and a detector arranged to receive: the reference radiation and; the reflected measurement radiation and to measure an interference pattern therebetween. The illumination module is configured to illuminate a plurality of distinct portions of the first optics pupil plane, each comprising a plurality of regions having different polarization states in the beam spot region. The detector is disposed such that: portions of the reference radiation and the measurement radiation that originate from the same distinct portion of radiation in the pupil plane spatially overlap; and portions of the reference radiation and the measurement radiation that originate from different distinct portions of radiation in the pupil plane are spatially distinct.

The invention provides a traffic flow speculation method fusing curvature gradient, and relates to the technical field of traffic flow speculation. The method comprises the following steps: firstly, acquiring traffic data of a visible area detector in a road network and data of a geographic information system; curvature and gradient characteristics of each road section are extracted, a geographically enhanced road network map structure is constructed, and edge weights between nodes are dynamically generated according to curvature differences and gradient differences; * jointly inputting the traffic data as node features and the graph structure into a graph neural network model, carrying out space-time modeling on the model through a graph convolution operator special for curvature and gradient, and explicitly fusing road alignment constraints to capture a traffic flow propagation rule; and finally, outputting a predicted value of the traffic state of the monitored blind area road section to realize dynamic speculation. According to the method, the problem of inaccurate traffic state perception caused by monitoring blind areas under complex terrains is effectively solved, and the speculation precision and reliability are improved.

The invention relates to a spark detector for extraction and conveying systems of combustible materials. Such spark detectors serve for the early detection of incipient fires and have a detector element 2, which is designed as an optical sensor. The small-area detector element is protected against contamination by the transported materials by a flat protective glass pane. According to the invention, the flat protective glass pane is replaced by an optical arrangement for generating a focal point, in particular by a converging lens, which causes the electromagnetic radiation 3 to be detected to be focused directly onto a focal point, or in its vicinity, on the surface of the detector element 2. This significantly increases the sensitivity of spark detector 1.

A damage information detection system as an example of the present disclosure comprises: a feature amount extractor configured to extract a feature amount from a vehicle image in which a vehicle is captured; a damaged area detector configured to detect a damaged area where damage is present in the vehicle based on the feature amount; a damage depth detector configured to detect relative depth of the damage to a case where the damage is not present based on the feature amount; and a damage characteristic detector configured to detect a characteristic of the damage based on the feature amount, the damaged area, and the relative depth.

The invention provides a finger pointing recognition method and device, electronic equipment and a storage medium, and relates to the technical field of gesture recognized.The method comprises the steps that a recognized original hand image of a user is input into a hand area detector, and hand position information in the original hand image is detected and output through the hand area detector; extracting a hand region image from the original hand image according to the hand position information, inputting the hand region image into a key point detection model for detection to obtain position information of each finger key point in the hand region image, and outputting hand feature information including the position information of each finger key point; and inputting the hand region image and the hand feature information into a classification model, performing feature extraction and fusion on the key points of the target finger contained in the hand region image and the hand feature information, and determining and outputting the direction of the target finger for accurately identifying the finger direction of the user.

The invention provides a coherent diffraction imaging method, device and system. The coherent diffraction imaging system comprises an off-axis illumination module, a displacement table, a detector and control equipment, the off-axis illumination module is used for synthesizing the coherent point light sources into off-axis illumination light spots and irradiating the off-axis illumination light spots on the surface of a measured object; the displacement table is used for placing a measured object and moves under the control of the control equipment so as to enable the light spots to irradiate different areas on the surface of the measured object; the detector is used for detecting a diffraction intensity pattern of an area irradiated by the light spot on the surface of the detected object in the moving process of the displacement table; and the control equipment is used for reconstructing the surface information of the measured object according to the diffracted intensity patterns of different areas on the surface of the measured object. The coherent point light sources are synthesized into light spots of off-axis illumination through the off-axis illumination module, the numerical aperture of illumination can be effectively improved, and therefore the resolution of coherent diffraction imaging is improved.

An image processing device and method are disclosed. The image processing device includes a first image generator configured to generate a first image and a second image using an input image; a reference area detector configured to search for a first reference area most similar to a target area of the input image in the first image, and search for a second reference area most similar to the target area in the second image; a correction area determiner configured to determine a target correction area that is more similar to the target area from among a first correction area located in an area corresponding to the first reference area of the input image and a second correction area located in an area corresponding to the second reference area of the input image; and a second image generator configured to generate a third image using the target correction area.

The present application relates to the technical field of battery detection, in particular to a battery in-situ characterization system and detection method based on XRD and Micro-CT, comprising an X-ray device, an in-situ battery sample device and a two-dimensional area detector arranged along the optical path in sequence, the in-situ battery sample device is connected to a rotating platform through a multi-pose adaptive clamp assembly, the center line of the in-situ battery sample device coincides with the rotation axis of the rotating platform, the in-situ battery sample device is a plunger type pressurized in-situ test battery, the middle part of the plunger type pressurized in-situ test battery is provided with an electrode sheet assembly, and both sides of the electrode sheet assembly are provided with high-transmittance windows. The present application combines the multi-pose adjustable clamp with the plunger type pressurized in-situ battery, meets the optimal optical path conditions of Micro-CT imaging and XRD crystal structure analysis respectively under the premise of not disassembling and not destroying the in-situ environment, and realizes multi-scale, dynamic and correlated characterization under electrochemical working conditions.

Provided are a linear scanning CT imaging system and method, the system comprising: a transfer device for moving a scanned object in a scanning channel along a predetermined transfer direction; the ray source is used for alternately emitting ray beams to form a scanning area; the detector comprises a first detector and a second detector; the first detector is used for detecting first projection data formed after the ray beam penetrates through the scanning object in the process that the scanning object penetrates through the scanning area; the second detector is used for detecting second projection data formed after the ray beam penetrates through the scanning object in the process that the scanning object penetrates through the scanning area; and the imaging device is used for generating a digital ray image of the scanned object according to the second projection data and obtaining a computed tomography image of the scanned object according to the first projection data and the second projection data.

A linear scanning computed tomography (CT) imaging system, comprising: a conveying apparatus (3), used for enabling an object (30) under scan to move in a preset conveying direction (D3) in a scanning channel (4); ray sources (1), used for alternately emitting ray beams to form a scanning area; detectors (2), including first detectors (21) and a second detector (22), wherein the first detectors (21) are used for detecting first projection data formed by the ray beams passing through said object (30) in the process of said object (30) passing through the scanning area, and the second detector (22) is used for detecting second projection data formed by the ray beams passing through said object (30) in the process of said object (30) passing through the scanning area; and an imaging apparatus (5), used for generating a digital ray image of said object (30) on the basis of the second projection data, and obtaining a CT scanning image of said object (30) on the basis of the first projection data and the second projection data. Also provided is a linear scanning CT imaging method.

The present invention provides a method for the coordinated deployment of multiple detectors in deep space and star catalogs based on reinforcement learning, which belongs to the field of planetary surface detection technology. The method of the present invention uses a flyer and a rover as detectors to collaboratively detect unknown areas in deep space and star catalogs. Three types of communication channels are established between the detectors, and the communication radius between different detectors is calculated. Constraints are established in terms of communication range, perception range, coverage mode and energy. The optimization goal is to maintain communication connectivity between detectors and maximize the total coverage area of ​​the detectors under limited energy. The flyer and the rover are used as two intelligent agents, and the optimal deployment strategy is determined based on the multi-agent proximal strategy optimization algorithm. The present invention optimizes the regional coverage strategy, realizes efficient allocation of resources, improves the detection efficiency and accuracy of the flyer and the detector in extreme terrain and complex environments, reduces energy consumption while ensuring coverage efficiency, and improves the overall energy utilization efficiency of the system.

The invention discloses a [mu] Bq / cm < 2 > level < 210 > Po activity detection device, belongs to the technical field of radionuclide detection, and is used for high-sensitivity detection of radionuclide < 210 > Po activity on the surface of a material in a low background experiment. Comprising a glove box, a sample cavity, a SiPIN detector array, an electronics box and a vacuum system. The glove box maintains a low-radon environment through nitrogen purging, and the sample cavity is sealed by adopting a KF200 flange and is connected with a vacuum pump; the nine SiPIN detectors connected in parallel are arranged in a 3 * 3 array, and the total sensitive area is 29.2 cm < 2 >; the electronics box is integrated with an LMH6629-based amplification circuit to replace a commercial pre-amplification module. Through the collaborative design of parallel connection of a plurality of small-area detectors, a closed low-background environment and self-research electronics, the single-day 210Po activity detection sensitivity is less than or equal to 1 mu Bq / cm < 2 >, the background is less than or equal to 3cpd, and the detector is suitable for surface pollution monitoring in neutrino and dark substance detection experiments.

An intraoral camera system includes an imaging unit that generates image data by capturing an image of a tooth inside the mouth of a user, an area detector that detects the orientation of the imaging unit according to output by a multi-axis acceleration sensor and detects, according to the orientation detected, an area whose image is being captured by the imaging unit from among areas inside the mouth, the areas being determined by dividing a dentition into sections, and an identifier that narrows candidates which are combinations of tooth types and tooth positions down to fewer candidates to be used, according to the image data and the area detected, and identifies the type and the position of the tooth according to the narrowed candidates and the image data.