65 results about "Fast scanning" patented technology

The invention discloses a rapid polarized light acoustic imaging device which comprises an excitation source, a light beam shaping module, a rapid polarization modulation module, an energy feedback module, a rapid scanning module and an acquisition processing module. And receiving photoacoustic signals corresponding to the exciting light in four different polarization states for calculation, and extracting anisotropy information of the sample. Compared with multiple times of scanning a sample or modulating the polarization state by rotating a half-wave plate, the problems of dislocation of multiple times of polarization acquisition points and false positive calculation are avoided, meanwhile, the time interval generated by continuously modulating the laser pulses is short, and energy fluctuation among the four pulses and errors caused by fluctuation are reduced. According to the invention, the limitation of the precision and speed of polarized light acoustic microscopic imaging is overcome, the microstructure characteristics in the target sample can be rapidly, accurately and highly sensitively detected, and the method has great application prospects in biomedical imaging and high-precision material detection.

The invention discloses a fast scanning seismic travel time calculation method based on a process function equation, and relates to the field of seismic travel time calculation, and the method comprises the steps: firstly, reading a speed model and related parameter information; then carrying out seismic source initialization, setting a slowness fixed item, calculating a travel time fixed item, and setting a travel time disturbance item according to the position of a seismic source point; next, Gauss-Seidel iterative calculation is carried out, in four alternating directions, a Gauss-Seidel type iterative method is used for solving an eikonal equation of factorization, a proper travel time disturbance term is selected through a causal condition, and finally, a travel time calculation result meeting a termination condition is output. According to the high-precision seismic travel time calculation method based on the factorization eikonal equation, the problem of seismic source singularity is well solved, high precision is guaranteed, meanwhile, the algorithm has high calculation efficiency, and the accuracy of subsequent seismic exploration data processing is improved.

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 laser radar system, a control method and a control device. The laser radar system comprises a transmitting unit, a first scanning unit and a second scanning unit. And the two scanning units are arranged on the propagation path of the detection light beam emitted by the emitting unit. The first scanning unit performs slow axis scanning on the detection light beam through swinging; and the second scanning unit performs fast axis scanning on the detection light beam through continuous rotation. The scanning period of the second scanning unit comprises a first time period for carrying out idle scanning and a second time period for completing one quick scanning period in the object space. The first scanning unit rotates from one angular position to another angular position in the first time period, and keeps the angular position unchanged in the second time period. The embodiment of the invention can be used for a detection or sensing system of a new energy vehicle or an intelligent driving vehicle, and can improve the speed and distance measurement performance of the laser radar under the condition of adopting the scanning device.

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 embodiment of the utility model provides a portable liquid flash spectrometer radiation monitoring device. The portable liquid flash spectrometer radiation monitoring device comprises a structure main body (1) with a cavity, a flash bottle (28) and a detection light chamber (4), the structure main body (1) comprises an upward upper shell (9); the detection light chamber (4) is provided with a first opening, and the first opening faces the upper shell (9); the detection light chamber (4) is fixedly arranged inside the structure main body (1); the scintillation bottle (28) is arranged outside an upper shell (9) of the structure main body (1); the lower end of the scintillation bottle (28) can be placed in the first opening and is detachably connected with the first opening in a sealed mode. Radiation of radionuclides is detected by means of the characteristic that fluorescent substances are precipitated in liquid, and high-sensitivity and high-precision radionuclide counting can be achieved. The device is simple to operate, can be moved and carried conveniently, can reach any scene for on-site detection, and is high in scanning speed and short in result obtaining time.

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.

An imaging method of a coherent Raman scattering imaging device based on spectral progressive scanning according to the present invention includes a synchronous two-color light source, a nonlinear amplification and spectral broadening module, a spectral progressive scanning control module, a linear amplification module, a beam combining and sample detection module, and a data processing module. The present invention does not require tuning a laser oscillator, nor does it require time scanning. By controlling the seed light and pump light of the nonlinear amplifier, adjusting parameters such as the dispersion, power, chirp of the seed light, and the pump power of the amplifier, the spectral evolution of the nonlinear amplifier is dynamically adjusted, so that it gradually transitions from a narrow spectrum to a wide spectrum, and from covering a single Raman peak to progressively covering multiple Raman peaks. This spectral progressive scanning coherent Raman light source can achieve simultaneous imaging of multiple chemical bonds, has a fast scanning speed, a flexible imaging method, and combines high spectral resolution and a wideband detection range, and also provides a new way to eliminate noise in coherent Raman scattering imaging.

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.

The utility model discloses a clinical information acquisition device, which belongs to the technical field of information acquisition and comprises an upper shell, the bottom surface of the upper shell is fixedly connected with a bottom shell, the upper surface of the upper shell is clamped with an acquisition shell, the inner wall of the acquisition shell is fixedly connected with a scanning module, and the inner wall of the acquisition shell is fixedly connected with a glass cover. The back of the acquisition shell is fixedly connected with an illumination module, the inner wall of the upper shell is fixedly connected with a mainboard, the front of the upper shell is fixedly connected with a display screen and a control button, and the inner wall of the bottom shell is fixedly connected with a scanning switch. According to the clinical information acquisition device, the data line and the USB plug are connected with the diagnostic instrument, information on a wrist strap of a patient can be rapidly scanned through the scanning module and the lighting module and transmitted to the diagnostic instrument, and the clinical information acquisition device has the advantages of being flexible, small, reasonable in design, simple, easy to learn, convenient to acquire information and the like; and the working efficiency of inputting the patient information by medical staff can be quickly improved.

The invention provides an intelligent steel coil warehouse two-dimensional code quick scanning tallying method, and belongs to the technical field of label image recognition. Comprising the following steps that S1, primary scanning units are arranged on the two sides of a driving route of a transport vehicle correspondingly and used for capturing first images of the two sides of a steel coil on the vehicle when the transport vehicle passes; a secondary scanning unit is arranged on at least one side of the driving route of the transport vehicle; s2, preprocessing the first image; s3, inputting the preprocessed first image into a trained first image processing algorithm, and extracting and identifying label content in the first image; s4, according to the content identification condition, different levels of alarm signals are triggered, and abnormal steel coil position serial numbers are stored; s5, identifying the abnormal steel coil according to the label content on the surface of the steel coil, starting a secondary scanning unit, and obtaining a second image of the label in the coil hole of the steel coil; and S6, inputting the second image into a trained second image processing algorithm, and extracting label content in the second image. After the first image is preprocessed, the label area is searched through the first image processing algorithm, the content of the label area is recognized, and if recognition fails to reach a certain number of times, corresponding measures are taken. If the label content is recognized again, the first image is obtained again, or a secondary scanning unit is adopted to carry out secondary shooting on the label in the coil hole of the steel coil, and a second image obtained through secondary shooting is recognized, so that the purpose of secondary scanning is achieved.

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.

Image scanning can be accelerated using a method for generating upsampled images. Such a method may comprise establishing relative motion between a field of view of a camera and a sample supported by a scanning stage in a first dimension at a compressing scanning speed, capturing an input image, and generating an upsampled image based on applying an upsampling algorithm to the input image. In some cases, the compressing scanning speed may be a speed that is greater than a synchronized scanning speed, wherein the synchronized scanning speed is synchronized with a line rate of the camera.

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.

The invention relates to a fiber quality detection device based on array image acquisition units. The fiber quality detection device comprises a plurality of image acquisition units, a switch and an industrial personal computer, the plurality of image acquisition units are arranged in a linear array along the width direction of the to-be-detected fiber, each image acquisition unit comprises an image sensor and a lens, and the adjacent lenses are overlapped in a scanning area of the to-be-detected fiber; the switch is electrically connected with the plurality of image sensors; and the industrial personal computer is electrically connected with the switch. The fiber quality detection device can completely cover the full width of the fiber to be detected, is wide in visual field range, high in scanning speed and low in omission ratio, and meanwhile, the relative speed with the fiber is smaller than that of a scanning scheme of a single image acquisition unit when the fiber quality detection device is used, so that a clearer image can be obtained to improve the impurity identification accuracy, and the detection accuracy is improved. And the detection accuracy is higher.

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.