43 results about "Fast scanning" patented technology

The invention provides a large-mirror-surface MEMS two-dimensional scanning micromirror which comprises a fast scanning shaft, a slow scanning shaft, a balance frame with multiple turns of coils, a micromirror surface and reinforcing ribs on the back face of the micromirror, the fast scanning shaft extends in the first direction, one end of the fast scanning shaft is connected with the micromirror surface, the slow scanning shaft extends in the second direction, and the other end of the fast scanning shaft is connected with the micromirror surface. The other end is connected with a balance frame with a plurality of turns of coils; the slow scanning shaft extends in a second direction perpendicular to the first direction, one end of the slow scanning shaft is connected with the balance frame with the multi-turn coil, and the other end of the slow scanning shaft is used for being connected with an external substrate; the balance frame with a plurality of turns of coils is of a hollow structure and is arranged around the mirror surface of the micro-mirror; the reinforcing ribs on the back face of the micro-mirror are of an oval hollow structure and are fixedly arranged on the lower surface of the mirror face of the micro-mirror, and the reinforcing ribs are connected in the first direction and the second direction to form a supporting structure. According to the structure, the rigidity of the mirror surface is greatly improved, and the capability of resisting external force interference is remarkably enhanced.

The invention provides a spectrum confocal three-dimensional shape measurement method and system based on an area light source, and belongs to the technical field of optical measurement, and the method comprises the steps: employing a Micro LED area light source capable of line-by-line driving to generate RGB three-color modulated isoenergetic white light, and after collimation and beam splitting of a beam splitter prism, the isoenergetic white light is converted into a light source; and the dispersion objective lens axially focuses light rays with different wavelengths at different height positions on the surface of a measured object. The reflected light is reflected to the array slit through the beam splitter prism and is split by the diffraction grating to form a spectral image containing space-wavelength two-dimensional information, and the surface height is analyzed by using a peak wavelength-height mapping relation. Full-field scanning is achieved by switching the area light sources line by line, and three-dimensional shape reconstruction can be completed without mechanical movement. The invention has the advantages of high light source brightness, high light source uniformity, uniform energy distribution of each wavelength, high scanning speed and high spatial resolution.

An alignment system includes a substrate stage, a plurality of sensors, and a control system. The substrate stage supports and moves a substrate having a plurality of substrate alignment marks disposed thereon. The plurality of sensors are arranged on a frame. The control system scans the substrate stage with respect to the frame. The control system controls movement of the substrate stage to correct for any misalignment or pitch mismatch between the plurality of sensors and the plurality of substrate alignment marks based on a known position of individual ones of the plurality of sensors with respect to each other.

The invention discloses a level set field reconstruction method and system based on a three-dimensional finite element grid and a medium. Relates to the technical field of geometric reconstruction. Positioning a space Cartesian grid area intersected with the boundary surface grid based on a separation axis theory; calculating a geometric space point-surface position relation, calculating a directed projection distance from a space Cartesian grid center to a two-dimensional boundary surface grid, and correcting the positive and negative characteristics of a Cartesian grid level set value based on a three-dimensional eight-direction rapid scanning method, so that the grid level set value is consistent with a region boundary value; according to the method, the geometric reconstruction problem of the deformable body which is complex in appearance and free of explicit analytic expression can be efficiently and accurately solved, a coupling approach between a finite element grid and a Cartesian grid is established under a non-conformal grid system, and the flexibility and universality of explicit calculation of a level set function under the Cartesian grid are improved.

The application discloses a kind of multi-beam confocal mask defect detection system and method based on fiber laser array, the present application obtains multi-point scanning light field as illumination light source based on fiber laser array, and can be based on the arrangement of laser array Realize the regulation and control of scanning light field, through the joint action of motion platform and multi-surface rotating mirror, realize fast and accurate mask two-dimensional scanning imaging, and based on confocal microscopic imaging method, with high-power microscope objective and photomultiplier tube Realize high-resolution detection of mask defect.Compared with the traditional point scanning type mask defect detection system, the present application has the advantages of high detection resolution, fast scanning speed, multi-point scanning light field can be freely regulated and controlled, and does not need to introduce additional diffractive optical element.

The application discloses a radar target single-station RCS fast scanning angle method, which comprises the following steps: firstly, a triangle grid is used to divide a created radar target geometric model; secondly, an ACA algorithm is used to perform low-rank compression processing on an excitation matrix; thirdly, a double-layer mixed compression method combining an ACA algorithm and QR decomposition is used; fourthly, QR decomposition is performed on the compressed matrix, and ACA algorithm is used for re-compression; fifthly, the number of excitations required for iterative solving in the solving process is further reduced; and finally, a multilevel fast multipole method is used to combine a near-zone block diagonal preconditioning technology to construct a matrix equation, so that the number of iterative solving times of the matrix equation is greatly reduced, the solving of the matrix equation is accelerated, and the solving efficiency of the radar target single-station RCS under the excitation of a plane wave at multiple angles is improved.

The application discloses an industrial CT image reconstruction method and device, electronic equipment and storage equipment, comprising obtaining projection image data and preprocessing to obtain target image data; based on the pre-trained U-Net variant lightweight network, the target image data is processed to obtain fine gradient direction prediction data and structure level similarity data, the U-Net variant lightweight network is trained based on the projection image data and the true value image data, and the loss function of the U-Net variant lightweight network comprises a structure similarity loss; based on the target image data, the fine gradient direction prediction data and the structure level similarity data, the target function is iteratively updated by using an alternating direction multiplier method to obtain reconstructed image data, and the target function is a high-order regularization function constructed based on the second-order total generalized variation and the structure level non-local mean of the iterative image data. The application can inhibit the streak artifact and photon noise of sparse images, so as to meet the requirements of fast scanning and sparse image reconstruction quality.

The present application relates to a kind of dynamic performance calibration systems for streak camera fast scanning gear, mainly used to solve the technical problems that the operation is complex when multiple pulse trains are generated by the existing light splitting and beam combining mode, and the consistency of optical path difference between each light path is difficult to guarantee, and the conventional electrical signal trigger mode exists sway, influence the time resolution capability calibration of streak camera.The present application can simultaneously generate multiple optical pulse trains, and the time interval consistency between multiple optical pulse trains is high.The optical pulse output by the laser is divided into the first light beam transmitted by the beam splitter and the second light beam reflected, the second light beam is input to the fast-response photodiode, and then converted into an electrical pulse to trigger the streak camera to work.The first light beam is input to the streak camera through the F-P standard device, and the streak camera reads the streak image output by the streak camera and analyzes it.The present application also provides a kind of dynamic performance calibration method for streak camera fast scanning gear.

The invention relates to a dynamic focusing printing method based on depth-of-field layering of an optical system, which belongs to the field of laser processing and comprises the following steps of: for a workpiece to be printed with an irregular printing working surface, dividing the printing working surface into a plurality of printing layers by taking the depth of field of the optical system as a unit in the height direction; the position of a focusing lens is adjusted, and a laser focus is adjusted to the working distance position of a certain printing layer; the galvanometer unit is adjusted to enable laser to scan on the printing layer, and then a pattern is printed on the printing working face, at the corresponding height, of the printing layer; and the steps are repeated until all the printing layers are printed. In the process of printing each printing layer, the laser focus is always in an allowable depth-of-field range, the focusing lens keeps still or moves at a constant speed according to a rule, the focal length tracking motion with high frequency response is not needed all the time, and even if the scanning speed is higher, a user does not need to worry that the focal length adjustment cannot follow up. And the printing efficiency is obviously improved, and the printing precision is not lost.

A portable and cost-effective programmable scanning diffuse speckle contrast imaging (PS-DSCI) technique enables noncontact, fast and high-density imaging of deep tissue blood flow, blood oxygenation, and tissue optical properties. PS-DSCI incorporates a digital micromirror device (DMD) for programmable fast scanning of near-infrared lights (e.g., line shape scanning) at different wavelengths over a large region of interest (ROI). A high-resolution 2D camera captures intensity images at each scanning source position. Novel image processing algorithms are created to define the pixel / detection areas at varied distances from the illumination center for capturing diffused photons from the tissue at varied depths. Spatial laser speckle contrasts are calculated in the defined detector regions and then converted to blood flow images at different depths. Line-shape scanning enables high temporal resolution to detect low-frequency oscillations (<0.1 Hz) across different brain regions, thus allowing for the reconstruction of brain functional connectivity maps.

Embodiments of the present application provide a scanning assistance system and a scanning assistance method. The scanning assistance system is connected to a medical imaging device. The scanning assistance system comprises a classification module, which processes information in a scanning process according to an input type of the information, to obtain feature data and / or question context data corresponding to the information; a decision module, which searches a pre-constructed knowledge base according to the feature data and / or question context data, to select a knowledge base capable of processing the feature data and / or question context data; and a control module, which extracts a question corresponding to the feature data and / or question context data and knowledge context for solving the question from the corresponding knowledge base according to the selection of the decision module, and uses a large language model to give a solution corresponding to the question. Through the embodiments of the present application, problems in the scanning process can be quickly solved, and the scanning process is optimized.

The invention discloses a radial interference filtering method and system for a small phased array weather radar, and relates to the technical field of phased array weather radar data processing, and the method comprises the steps: obtaining a reflectivity factor, a correlation coefficient and a differential propagation phase shift; performing preliminary identification on radial interference in the phased array weather radar data based on the reflectivity factor, combining all interference points which are preliminarily identified, and generating candidate interference masks; executing a preset dual-polarization precipitation protection mechanism on the candidate interference mask to generate a protection mask; and recovering the protected data according to the protection mask, filtering real interference, and outputting quality control data. According to the method, the error filtering condition of normal echoes is remarkably reduced, the method is efficient in calculation, the real-time requirement of fast scanning of the phased array radar is met, and the meteorological monitoring and forecasting accuracy is remarkably improved.

The application discloses an online electric leakage detection and early warning module for outdoor line poles and relates to the technical field of power line monitoring. The module comprises a current collection unit, a signal conditioning unit, an environment sensing unit and a main control processing unit. An adaptive threshold calculation submodule and a dynamic sampling scheduling submodule are arranged in the main control processing unit. The adaptive threshold calculation submodule divides the environment into bins according to temperature and humidity, constructs a robust baseline with a median and an absolute deviation of the median, and generates a dynamic alarm threshold. The dynamic sampling scheduling submodule divides the operation into five states, i.e., deep sleep, fast scanning, monitoring, intensive capture and alarm confirmation, and the transition is driven by the dynamic threshold and the signal trend. The two submodules are coordinated through a sample bucket permission flag, the data during the fault period is prohibited from being backfilled into the baseline, and closed-loop purification is realized. The application takes into account low false alarm, high sensitivity and transient fault capture capability, and does not significantly increase power consumption.

The application discloses an X-ray light sheet confocal three-dimensional fluorescence microscopic imaging system and method, and belongs to the technical field of X-ray fluorescence marked microscopic imaging. The system comprises a fan-shaped X-ray source, an X-ray slit, an electric translation stage, a three-dimensional electric object table, a microscopic scanning module, a confocal module, a lens and a photoelectric detector. A sample is placed on the three-dimensional electric object table, and the fan-shaped X-ray source is located on one side of the three-dimensional electric object table. The X-ray slit is located between the three-dimensional electric object table and the fan-shaped X-ray source and is controlled to be lifted and lowered by the electric translation stage. The microscopic scanning module is located above the three-dimensional electric object table, and the confocal module, the lens and the photoelectric detector are sequentially located on an emergent light path of the microscopic scanning module. The application combines tomography technology based on the fan-shaped X-ray source and a fluorescence confocal microscopic system based on laser, has high spatial resolution and fast scanning speed.

The application belongs to the technical field of computer-aided education, and particularly relates to a text recognition method and device, a computer readable storage medium and a scanning pen. The method comprises the following steps: detecting a preset scanning preparation action; if the scanning preparation action is detected, collecting a first scanning image set through a camera of the scanning pen; detecting a preset scanning execution action; if the scanning execution action is detected, collecting a second scanning image set through the camera; splicing the first scanning image set and the second scanning image set to obtain a target scanning image; and performing text recognition on the target scanning image to obtain a text recognition result. In the application, image scanning can be performed in advance after the scanning preparation action is detected, and the images scanned in advance and the images scanned normally are spliced and then recognized, so that the missing scanning content caused by the delay and the too fast scanning speed can be effectively compensated, and complete scanning content can be obtained.

Embodiments of the present disclosure relate to fast scanning acoustic microscopy for subsurface imaging and inspection. For example, a system may include at least one processing device configured to perform operations including initiating imaging of a sample using an acoustic microscope, and causing the sample to be scanned at a radial distance relative to a center position of the sample to perform the imaging of the sample. The sample is located on a stage, and the stage rotates at a rotational speed determined based on the radial distance.

This invention provides an automatic printing trace system, comprising a paper feeding and scanning mechanism, a calculation and waiting mechanism, a printing mechanism, and a calculation module. The paper feeding and scanning mechanism and the printing mechanism are respectively connected to the two ends of the calculation and waiting mechanism. The calculation module is electrically connected to the paper feeding and scanning mechanism, the calculation and waiting mechanism, and the printing mechanism. The paper feeding and scanning mechanism scans documents and then feeds them to the calculation and waiting mechanism, while simultaneously transmitting the scanned image to the calculation module for processing. The calculation and waiting mechanism temporarily stores the scanned documents. After the calculation module finishes processing the document, it feeds it to the printing mechanism, which then prints the document based on the calculation result. This invention eliminates the need to adjust the image scanning speed of the paper feeding and scanning mechanism, allowing for direct feeding of quickly scanned documents to the calculation and waiting mechanism. The calculation and waiting mechanism then transmits the document to the printing mechanism for printing after the calculation module has finished processing, thereby improving the efficiency of the automatic printing trace system.

The embodiment of the invention discloses a scanner motion state monitoring method and device, computer equipment and a storage medium. The method comprises the steps that a target object is scanned through a target scanner, and motion parameters of the target scanner are acquired; when the motion parameter is smaller than a first preset motion parameter, indicating the target scanner to be in a static state through the target scanner or the user interface; when the motion parameter is greater than or equal to the first preset motion parameter and less than the second preset motion parameter, indicating the target scanner to be in a slight motion state through the target scanner or the user interface; and when the motion parameter is greater than or equal to a second preset motion parameter, indicating the target scanner to be in a motion overrun state through the target scanner or the user interface. The target scanner can prompt the current motion state of the scanner through the scanner or the user interface so as to prompt the scanning user to control the scanning speed, and the situation that the model construction precision is affected due to the too high scanning speed is avoided.

The utility model provides a kind of copper foil detection device of raw foil machine, including roof, the both sides of the one end of roof are uniformly provided with the mounting plate extending outward, and the bottom of roof is equidistantly provided with three sliding grooves, and the bottom of the movable plate between two mounting plates is equipped with laser marking assembly. Compared with prior art, the utility model has the beneficial effects as follows: detection, shading, marking three major modules closely cooperate, form the integrated closed-loop process of "detection-shading-marking", shading component real-time isolation external interference, CCD detection component fast scanning, laser marking assembly instant marking, when the second lead screw rotates, drive both sides first nut to drive shading component synchronous movement, when copper foil width changes, shading component can quickly adjust coverage, further refine shading area, continue to isolate external light interference in the process of copper foil operation, provide stable optical environment for CCD detection, guarantee image acquisition quality.

Ultrasound (US) imaging is scaled to arrays having a large number of elements. We use “active windows” to define the parts of the overall array that are active for transmission and reception. Each active window is 2D. Local electronics can move these active windows freely within the array, either together or independently. This effectively provides fast scanning by electronically moving the active windows around within a large stationary array. All of the elements within an active window are individually controlled for beam forming, focusing etc. by beam forming electronics in the system controller. Thus there is no need to have all of the elements of the large, stationary 2D ultrasound array connected to the system controller.

A method and an apparatus for processing image data based on a Mama model are provided. The method comprises the following steps: receiving a data sequence corresponding to image data; processing the data sequence by using a Mamba model to obtain a data sequence processing result; and outputting a classification result corresponding to the image data based on the data sequence processing result. The Mama model comprises a Mama trunk block for processing a data sequence based on a selective state space model; and the plurality of calculation blocks are positioned behind the Mamba main block. Each of the plurality of calculation blocks includes: a global scoring unit performing a global evaluation to obtain an importance score; a context holding unit that generates relative position information of the token; and a slow-fast scanning unit performing a first selective state space update and a second selective state space update. Therefore, the Mama model can significantly reduce the number of floating point operations per second in the reasoning stage on the premise of not sacrificing the precision basically.

The invention discloses an astigmatic displacement microscopic imaging method and an astigmatic displacement microscopic imaging device for axial sub-nanometer resolution, namely an astigmatic displacement microscope (ADM). The astigmatic displacement microscopic imaging method and the astigmatic displacement microscopic imaging device for axial sub-nanometer resolution are applied to an astigmatic displacement microscope (ADM). The ADM technology is based on the astigmatism measurement principle, has the advantage of optical non-contact, and can simultaneously realize four measurement functions: microscopic three-dimensional shape scanning imaging, displacement measurement, vibration analysis and film thickness measurement. The Z-axis resolution of three-dimensional morphology imaging is about 0.1 nm, and the thickness detection of a monatomic layer of a two-dimensional material and the like can be met; the device can be matched with any objective lens, such as working media of air, water immersion and oil immersion; a fast scanner is adopted to replace a traditional sample displacement table for scanning, and the imaging time of a single image is fast to a second level; and in combination with a normalization circuit, the influence of different sample reflectivity on a measurement signal can be eliminated. The astigmatic displacement microscope can meet the test requirements of application scenes such as micro-nano devices, semiconductors, piezoelectric sensing, material morphology measurement, in-situ surface and interface research, precise displacement measurement, microscopic vibration analysis and the like.

The invention provides an ultra-large field-of-view multiphoton microscopic imaging system, which adopts a large-field-of-view objective lens based on a large-aperture combined lens, and the objective lens has a high numerical aperture and a large field-of-view number. The method comprises the following steps of: obtaining objective lens parameters, determining sizes and optical parameters of optical elements such as an X-axis scanning mirror, a Y-axis scanning mirror, a scanning lens, a sleeve lens and the like according to the objective lens parameters and an optical invariant principle, and then designing an ultra-large-view-field multi-photon microscopic imaging system by utilizing the objective lens and the optical elements so as to achieve high-resolution large-view-field imaging. Besides, a double-axis micro-electro-mechanical system rapid scanning mirror is adopted in the laser scanning system, and by controlling the double-axis micro-electro-mechanical system rapid scanning mirror and a double-axis galvanometer scanning mirror matched with the double-axis micro-electro-mechanical system rapid scanning mirror, the imaging speed and the switching flexibility among different imaging sub-regions are superior to those of a common combination of a galvanometer scanning mirror and a resonance galvanometer; the method is suitable for carrying out ultra-large field-of-view imaging detection on a rapidly changing physiological process in living biological tissues.

The present application relates to a kind of high-speed high-resolution ultrasonic imaging detection method for composite material, belong to the field of ultrasonic nondestructive testing, to solve the existing ultrasonic imaging detection method for composite material cannot meet the detection requirements of fast scanning and high-resolution simultaneously.A kind of high-speed high-resolution ultrasonic imaging detection method for composite material, including according to set principle connection ultrasonic instrument and ultrasonic probe, using water immersion coupling mode to carry out penetration method and reflection method detection to the product to be detected;Rotary scanning, synchronous acquisition probe position signal and rectangular ultrasonic probe B received ultrasonic penetration signal, ultrasonic reflection signal, reconstruct signal forms ultrasonic C scan image.The method of the present application can meet the detection requirements of fast scanning and high-resolution simultaneously for the ultrasonic imaging detection method for composite material.

The invention discloses a heat supply network rapid leakage point searching system and method based on multi-index fusion, and relates to the technical field of heat supply network detection, and the system comprises a multi-source detection data collection module, a leakage point intelligent judgment module, a cooperative positioning execution module and a big data optimization module. A multi-index detection system is constructed, a scientific leakage point judgment rule is formulated, multi-dimensional physical quantities such as acoustic signals, thermal imaging characteristics, ground deformation and water quality parameters are comprehensively considered, the limitation of a single detection means under complex working conditions is overcome, the accuracy of leakage point positioning is improved, the problems of misjudgment and leakage detection caused by environmental interference are avoided, and the detection efficiency is improved. Reliable technical support is provided for maintenance of a heat supply pipe network; the high-altitude thermal imaging unmanned aerial vehicle and the ground detection equipment are cooperatively dispatched by adopting a hierarchical positioning mechanism, a suspected area is quickly scanned and locked through the unmanned aerial vehicle, and then fine verification is performed by utilizing the handheld equipment, so that quick response and timely repair of a heat supply network leakage point are realized, and the heat energy loss is reduced.

A computer-implemented method is provided for improving image quality. The method comprises: acquiring, using single-photon emission computed tomography (SPECT), a medical image of a subject, wherein the medical image is acquired with shortened acquisition time; and applying a deep learning network model to the medical image to generate an enhanced medical image.

The application discloses a kind of disease detection and polishing repair method of railway rail, including step 1: power on and start PLC, carry out polishing grinding wheel reset zero operation;Set the basic parameters of the rail to be polished this time, select the rail polishing area;Step 2: enter detection mode, execute disease identification, profile acquisition reconstruction, polishing parameter generation process, judge whether the rail needs polishing based on the rail profile detection result, if yes, execute step 3, the closed loop process of the application through defect identification, profile acquisition repair, parameter generation, accurate polishing, quality evaluation, through the step-by-step detection mode of fast scanning positioning defect and slow scanning acquisition profile, ensure the accuracy of polishing target;Combined with multi-curve fitting and profile alignment technology, ensure the accuracy of polishing amount calculation;Finally through standardized polishing operation and quality evaluation, realize the accurate repair of rail profile, realize the integrated operation of detection and polishing, improve the efficiency and safety of rail repair operation.

The application discloses a pre-venipuncture strategy analysis and puncture path planning method and system, a series of image frames are acquired by rapidly scanning the region through an infrared imaging device. Through an image quality evaluation function, a most clear image of a vein contour is automatically selected as a reference for subsequent analysis; for patients with poor imaging of blood vessels in the ultrasound image, the selection of the needle insertion position on the vein center line can also be accurately performed, the puncture success rate is improved, the joint parameters of the puncture equipment are accurately solved, the accurate control of the equipment is ensured, the equipment can accurately reach the target puncture point, the safety of medical staff is ensured when puncturing patients with highly infectious diseases, and the risk of puncture failure caused by inaccurate path planning is reduced.

The invention provides a cooperative control system for a fast scanning magnet power supply, and relates to the technical field of scanning power supply control, the system comprises an error acquisition module, a dynamic module, a static module and a control module; the control module comprises a dynamic module switching control module and a closed-loop control module; the dynamic module and the static module are cascaded, and a circuit formed by cascading is connected between a scanning magnet power supply and a magnet load and provides driving current for the magnet load; the error acquisition module is used for acquiring a current error signal between an actual load current output to the magnet load and a current given target value; the dynamic module switching control module is used for controlling input and exit of a dynamic module by adopting hysteresis comparison logic based on the absolute value of the current error signal; and the closed-loop control module is used for stopping current error integral accumulation during the input period of the dynamic module and recovering the current error integral when the dynamic module exits working, and is used for simultaneously realizing an ultrahigh current change rate and high steady-state precision.