226 results about "Line scan" patented technology

Disclosed in the present invention is a three-dimensional reconstruction method based on kinematic calibration for the monomerization of a line-structured light point set. The method comprises: rigidly combining an area-array camera with a linear-line-structured light emitter, and mounting same on a motion platform; using a standard radius value of a standard sphere and line-structured light scanning data to calibrate structural parameters of the motion platform of a measurement apparatus; with the calibrated spherical center position of the standard sphere and the standard radius of the standard sphere as constraints, calibrating a spatial position relationship of a line-scanned point set; controlling the motion of the five-axis motion platform, and acquiring scanning data of a measured piece in different poses; and using the scanning data and a real-time point cloud calibration matrix to complete high-quality three-dimensional model reconstruction of the measured piece from its multi-pose scanning. The system comprises: an apparatus fixing module, a calibration module, a point cloud calibration module, a scanning module, and a point cloud reconstruction module. By means of using the present invention, the reconstruction accuracy of a line-structured light three-dimensional point cloud model can be improved. The present invention can be widely applied to the field of three-dimensional reconstruction.

The invention discloses a static flying spot scanning method based on a flying focus point x-ray source, and belongs to the technical field of x-ray scanning, and the method comprises the following steps: S1, providing a flying focus point x-ray source; s2, providing a static restraint device; s3, controlling the focus of the flying focus x-ray source to move or switch according to a preset scanning mode, so that x-rays irradiate the scanned object point by point through a hole groove or a spiral gap in the static constraint device, and performing flying spot scanning on the scanned object; and S4, collecting a scattering x-ray signal of the scanned object by using a detector, converting the scattering x-ray signal into an electric signal, carrying out analog-to-digital conversion, and carrying out signal processing to generate a scanning image. According to the static flying spot scanning method based on the flying focus point x-ray source, a traditional combination of a fixed focus point and a high-speed mechanical device is replaced by the combination of the electrically-controlled x-ray source capable of changing the focus point and the static constraint device, and the scanning performance is improved.

The invention discloses a power distribution area energy storage-photovoltaic oscillation cooperative suppression method based on impedance remodeling, and belongs to the technical field of power system stability control. According to the method, the impedance characteristic of the system is scanned online in real time, the virtual impedance controller parameters of the photovoltaic inverter are dynamically optimized, and the impedance frequency characteristic of the zone area network is actively remodeled, so that the zone area network is always far away from a stable critical point, and oscillation is prevented from occurring from the source. When it is detected that the oscillation energy exceeds the standard, the system immediately triggers the energy storage device to be switched to a virtual synchronous generator mode, phase information of a plurality of energy storage units in a fiber channel synchronization cluster is used, anti-phase damping current opposite to the oscillation trend is injected, and the oscillation energy is rapidly consumed. The invention provides a double-layer suppression strategy based on impedance remodeling and energy storage cooperation, the cooperation of photovoltaic impedance active prevention and energy storage instantaneous suppression is realized, the problem that a traditional fixed parameter damper loses efficacy due to frequency drift is solved, and the operation stability of a high-proportion renewable energy power distribution network is improved.

The invention provides an image acquisition system and an image data processing method and device.The system comprises a multi-line scanning image sensor, a light source and a data processing unit, and the working face of the multi-line scanning image sensor is parallel to the plane where a measured object is located; a linear photosensitive unit on the working surface of the multi-line scanning image sensor deflects at a preset angle relative to the movement direction of a measured object, and a light emitting direction of the light source and a plane where the measured object is located form a preset angle; the motion step length of the measured object is a preset multiple of the size of a pixel unit in the linear photosensitive unit projected on the surface of the measured object; and the data processing unit is used for receiving the initial image data of the detected object sent by the multi-line scanning image sensor and carrying out time delay integral processing, pixel offset processing and accumulation processing to obtain oblique image data for detecting the defects of the detected object. The system can effectively reduce the production cost of scratch detection.

The invention relates to the technical field of laser vision fusion, and discloses a belt tearing detection method and device based on laser vision fusion. The method comprises the following steps: scanning depth contour data of a running belt by adopting a line laser; a line-scan digital camera is adopted to shoot a texture image of the running belt, and depth feature data are recognized based on the texture image; performing weighted merging on the depth contour data and the depth feature data to generate first depth data; correcting the first depth data to obtain second depth data; and according to the belt working condition, a tearing judgment threshold value is set, a depth abnormal area in the second depth data is analyzed based on the tearing judgment threshold value, and the tearing position and the tearing depth value are determined. The method effectively eliminates the interference of environmental factors on the measurement precision, can completely describe the geometrical morphology and spatial distribution characteristics of tearing, and improves the accuracy of belt tearing detection.

This application provides a display panel and its driving method. The display panel includes at least a first display zone and a second display zone. Each display zone includes multiple pixel rows, which are driven by a driving module connected to pixel circuits. The driving method includes inputting a first light emission control start signal, a first reset start signal, and a first line scan start signal to a driving module connected to the first pixel row of the first display zone; and inputting a second light emission control start signal, a second reset start signal, and a second line scan start signal that are phase-differentiated by half a frame from the first light emission control start signal, half a frame from the first reset start signal, and half a frame from the first line scan start signal to a driving module connected to the first pixel row of the second display zone. This application improves screen flicker in low-frequency scenes by controlling the staggered light emission of pixel rows, thereby increasing the actual light emission time of the display area and reducing brightness drop.

A super-resolution imaging method (100) and apparatus based on line scan. The super-resolution imaging method (100) based on line scan includes: providing multiple types of structured line excitation light, each of the multiple types of structured line excitation light having a different illumination mode (step S102); illuminating a target area in a manner of row-by-row scanning along a single first direction while switching the multiple types of structured line excitation light, such that each row in the target area is illuminated by a corresponding type of structured line excitation light among the multiple types of structured line excitation light (step S104); and detecting response light generated by the each row in the target area in response to being illuminated by the corresponding type of structured line excitation light (step S106).

The invention discloses a calibration method based on a flying focus x-ray imaging system, which belongs to the technical field of x-ray scanning and comprises the following steps: S1, setting up a calibration environment; s2, scanning a focus, and controlling electron deflection by a deflection system to enable the focus to move point by point in a focal plane; s3, data acquisition: acquiring a signal generated after the x-ray passes through the hole slot by a detector; s4, searching effective focuses, and automatically searching focuses aligned with the hole slots through an algorithm; and S5, data updating: refreshing a system configuration table and current parameters. According to the calibration method based on the fly-focus X-ray imaging system, the calibration work of the fly-focus imaging system is achieved through a simple process and an intermediate process, a complex subsystem independent calibration scheme depending on a precise process is replaced, the usability of products is improved, and the production, machining and maintenance cost is reduced.

This application provides a gap and surface difference measurement system, method, electronic device, and storage medium, relating to the field of machine vision technology. The system includes a first line scan profiler, a second line scan profiler, and an electronic device. The scanning surfaces of the two line scan profilers are coplanar and partially overlap, and the target gap on the object under test is located in the overlapping area of ​​their scanning surfaces. The first line scan profiler scans to obtain a first profile; the second line scan profiler scans to obtain a second profile; the electronic device acquires the first and second profiles, and based on a pre-calibrated coordinate transformation relationship between the two line scan profilers, transforms the first and second profiles to the same coordinate system and fuses them to obtain a first fused profile. Based on the first fused profile, the gap value and surface difference value of the target gap are determined. This system achieves automatic measurement of gap and surface difference, avoiding the low accuracy problem of manual measurement, thereby improving the accuracy of gap and surface difference measurement.

Real-time focusing in a slide-scanning system. In an embodiment, focus points are added to an initialized focus map while acquiring a plurality of image stripes of a sample on a glass slide. For each image stripe, a plurality of frames, collectively representing the image stripe, may be acquired using both an imaging line-scan camera and a tilted focusing line-scan camera. Focus points, representing positions of best focus for trusted frames, are added to the focus map. Outlying focus points are removed from the focus map. In some cases, one or more image stripes may be reacquired. Finally, the image stripes are assembled into a composite image of the sample.

A method for acquiring an extended ultrasound image according to the present invention comprises the steps of: receiving an ultrasound scan area image from a three-dimensional image capturing device by means of a computer to generate three-dimensional shape data; generating an extended image plane for obtaining an extended ultrasound image with respect to the generated three-dimensional shape data by means of the computer; generating a line scan path for acquiring a plurality of ultrasound image frames including an overlapping area for the extended image plane by means of the computer; acquiring a plurality of ultrasound image frames by moving an ultrasound probe along the generated line scan path by means of the computer; selecting an ultrasound image frame corresponding to the extended image plane; and generating an extended ultrasound image by synthesizing an overlapping portion of the selected plurality of ultrasound image frames.

The application relates to the technical field of nondestructive testing, and provides a part surface flaw detection method, system and equipment based on line scanning, which solves the problems of easy missed detection of defect detection and inability to comprehensively evaluate the expansion risk of composite defects. The method comprises the following steps: scanning the surface of a bogie by using a line scanning device, extracting temperature field distribution data and temperature gradient distribution data from the scanning line data set; generating an abnormal candidate area based on the temperature gradient distribution data; obtaining phase shift data of an eddy current signal in the abnormal candidate area, and assigning a defect classification mark to the abnormal candidate area; analyzing the spatial coordinates of the temperature gradient distribution data and the defect classification mark, and generating a reference parameter; and extracting a target defect area according to the spatial distribution weight of the reference parameter, so as to realize flaw detection of the surface of the bogie. The application improves the accuracy, reliability and efficiency of high-speed rail bogie surface defect detection, and provides strong technical support for guaranteeing the safe operation of high-speed rail.

A computer system (such as a controller) that distributes locations of access points is described. During operation, the computer system may receive, from the access points, information specifying the locations of the access points, uncertainties in the locations, and results of wireless scans. Then, the computer system may provide, to the access points, second information specifying the locations, the uncertainties in the locations, and the results of the wireless scans. Next, the computer system may receive, from the access points, third information specifying second locations of the access points and second uncertainties in the second locations, where the third information received from a given access point in the access points includes revisions to a location of the given access point and / or an uncertainty in the location. These revisions may be based at least in part on the second information.

An X-ray scanning system includes: a housing configured to be handheld; an X-ray source for scanning a target; a set of first detectors configured to be mechanically coupled to the housing and to detect resulting X-rays received from the target responsive to scanning the target; a second detector configured to be mechanically coupled to the housing; and a set of processors mechanically coupled to the housing and communicatively linked to the first detector and to the second detector so as to receive first and second signals, respectively, therefrom. The processor(s) are configured to: generate an image of the target based on the first signal; distinguish, in the second signal, a contribution of passive nuclear radiation detected at the second detector; and provide an output corresponding to the contribution of passive nuclear radiation. A related system for identifying a radioactive isotope, along with corresponding methods, are provided.

A multiplexed line scanning LiDAR system generates a line scanned image of an object based on distances to the object measured by respective points. The multiplexed line scanning LiDAR system utilizes at least one set of light sources emitted to a fiber laser element to form a line scan pattern to determine the distance and velocity of an object.

The invention relates to the technical field of metal plate processing and repairing, and discloses an integrated stress relieving-leveling-detecting method and device for a stainless steel negative plate. The method comprises the following steps: fixing a cathode plate and carrying out initial three-dimensional scanning; identifying a high-stress area based on the scanning data and planning a nonlinear screeding path; the execution head is controlled to conduct screeding operation along the path to release internal stress; and through online scanning feedback, performing compensatory repair on the substandard area to form closed-loop control. The corresponding device comprises a workbench, an integrated sensing system, a multi-axis moving integrated execution head unit and a controller. The functions of stress relief, leveling and detection are integrated under one-time clamping of the same station, automation and intelligentization of the repairing process are achieved, compared with a traditional method, the repairing efficiency and precision are remarkably improved, and the flatness of the negative plate can be stably controlled to be the high standard that the draping degree is smaller than or equal to + / -5 mm.

Systems and methods of automatically generating synthetic X-ray scan data include generating scan data corresponding to a frame holding or supporting an object, wherein the frame and hence the object is manipulated, without manual intervention, to be positioned in a plurality of orientations in three dimensional space. Subsequently, X-ray scan data corresponding to the object is isolated and extracted from the X-ray scan data corresponding to the frame, the X-ray scan data corresponding to the object is adjusted and finally each of the adjusted X-ray scan data corresponding to the object is inserted into X-ray scan data of a cargo container in order to generate a plurality of X-ray scan data of the cargo container embedded with the object.

The utility model relates to the technical field of semiconductor packaging detection equipment, in particular to a chip substrate TGV defect detection positioning device. Comprising a four-sensor cooperative positioning system, and the four-sensor cooperative positioning system comprises a second sensor which is installed on a first vertical axis module, is provided with a lens and a coaxial parallel light source, and is used for identifying a reference hole in a glass substrate and establishing a mapping relation between a platform coordinate system and a CAM coordinate system through a Halcon algorithm; the device further comprises a first line scanning sensor, a second line scanning sensor and a third line scanning sensor which are installed on the second vertical axis module, the third vertical axis module and the fourth vertical axis module respectively, the second line scanning sensor and the third line scanning sensor are respectively aligned with the upper aperture and the lower aperture of the through hole; the device can solve the problems of large positioning deviation, low reinspection efficiency and high false detection rate in the prior art.

The invention discloses a space curve trigger signal generation system based on a TDI line scanning camera, relates to the technical field of signal generation, and creatively provides the space curve trigger signal generation system based on the TDI line scanning camera based on a period detection unit and an interpolation compensation unit. The problem that an existing TDI line scanning camera cannot generate a line trigger signal during space three-dimensional curve scanning is well solved, it is ensured that the collection moment and displacement of each column of images are strictly synchronized, and the exposure time is constant.

The invention discloses a real-time wire diameter detection method and system for multiple metal welding strips, and relates to the technical field of photoelectric measurement. The method comprises the following steps: enabling the multi-metal welding strip in linear motion to pass through a constant backlight illumination area to generate a high-contrast projection; the linear array CCD is controlled to perform continuous line scanning in a scanning mode in the vertical movement direction to obtain image frames; determining left and right edge coordinates of sub-pixel precision based on a gray gradient edge extraction algorithm; and calculating a line diameter measurement value according to the edge coordinate difference value and the calibration coefficient, and performing real-time filtering. The system correspondingly comprises a backlight illumination module, an image acquisition module, an edge processing module and a wire diameter calculation module. Reflection interference is eliminated through backlight illumination, the linear array CCD is used for high-speed scanning to adapt to the motion state, the precision is improved in combination with a sub-pixel algorithm, and the problem of high-precision real-time detection of the wire diameter of the metal welding strip under the high-speed condition is effectively solved.

Systems and methods for providing a memory sub-system controller that selectively performs extrinsic defect scan operations on certain word line groups of a memory sub-system are described. The controller performs an extrinsic defect scan operation on a set of predetermined portions of a set of memory components. The controller, in response to performing the extrinsic defect scan operation, stores a map that identifies a subset of the predetermined portions of the set of memory components having a reliability value that fails to satisfy a reliability criterion. The controller, in response to storing the map, performs one or more subsequent extrinsic defect scan operations on the identified subset of the predetermined portions of the set of memory components having the reliability value that fails to satisfy the reliability criterion.

This invention provides a hydraulic pressure-thermal bath coupled true triaxial loading and panoramic real-time CT scanning device, belonging to the fields of rock mechanics, oil and gas field development, and tight sandstone gas extraction. It overcomes the problem in existing rock mechanics experimental devices where true triaxial loading, hydraulic loading, thermal bath environment control, and internal structure observation are difficult to achieve in a single space. The device includes an X-ray scanning system, a forward and backward precession loading system, a temperature-controlled liquid circulation system, and a multi-functional pipeline system with signal linkage, forming a multi-field loading control system. This multi-field loading control system is configured to: monitor the rate of change of loading force, hydraulic pressure, and temperature in each loading direction in real time, and dynamically adjust the frequency or scanning mode of the CT scan based on the monitored parameter change rates.

An x-ray chopper wheel assembly includes a disk chopper wheel and a source-side scatter plate that has a solid cross-sectional area that absorbs x-ray radiation and is substantially smaller than a solid cross-sectional area of the disk chopper wheel. The assembly also includes a support structure that secures the source-side scatter plate substantially parallel to the disk chopper wheel, with a source-side gap between the scatter plate and the disk chopper wheel being a distance that substantially prevents x-ray leakage. An additional, output-side scatter plate may also be provided to reduce x-ray leakage further. Embodiments enable safe operation while significantly reducing weight, which is advantageous for a variety of disk-chopper-wheel-based x-ray scanning systems, especially hand-held x-ray scanners.

The invention provides an automatic seed testing method and system based on a corn ear panoramic image, and belongs to the technical field of corn ear seed testing. Line scanning panoramic splicing can still keep continuity and geometric consistency under the condition of rotation eccentricity / slippage, and the negative influence of stripe distortion on subsequent grain detection and ear row analysis is remarkably reduced. Therefore, on the premise of not depending on high-cost three-dimensional equipment, not only can the advantage of ear full-surface information acquisition be kept, but also stripe error distortion in the scene can be corrected by utilizing an error compensation mechanism, so that the stability and precision of ear row number, row grain number and total grain number calculation are improved; the problems that strip error distortion is prone to being generated in special scenes such as ear rotation eccentricity or slippage in existing line scanning panoramic splicing, and then the ear row number and the grain statistical accuracy are reduced are solved.

Disclosed is a display device including: a display portion including first and second pixels, a first scan line and a first sensing line and a second scan line and a second sensing line connected to the first and second pixels; a scan driving portion including a first sensing output transistor and a second sensing output transistor that supply first and second sensing signals to the first and second sensing lines, a first scan output transistor and a second scan output transistor that supply first and second scan signals to the first and second scan lines; a first sensing connection line and a second sensing connection line that connect the first sensing line and the first sensing output transistor and the second sensing line and the second sensing output transistor, respectively; a first scan connection line and a second scan connection line that connect the first scan line and the first scan output transistor and the second scan line and the second scan output transistor, respectively, the first scan connection line and the first sensing connection line intersecting and overlapping each other, and the second sensing connection line and the second scan connection line intersecting and overlapping each other.

This invention discloses a layout method, comprising: Step 1, initializing a layout container, including setting the width and height of the layout container and initializing a list of horizontal lines. Step 2, providing multiple rectangular layouts to be laid out. Step 3, placing each layout into the layout container based on the horizontal lines to achieve layout. The placement of each layout involves the following iterative steps: Step 31, performing a horizontal line scan to find a selected horizontal line, wherein the selected horizontal line is the one with the lowest height value and a width value greater than or equal to the width of the layout. Step 32, placing the layout on the selected horizontal line, with the bottom edge of the first side of the layout aligned with the first edge of the selected horizontal line. Step 33, updating the horizontal lines, including updating the portion of the selected horizontal line not covered by the layout to a new horizontal line. The top edge of the layout is also updated to a new horizontal line. This invention enables rapid and efficient layout of layouts, saving significant layout time.

The invention discloses a high-fidelity scene reconstruction method based on laser radar-vision-inertial navigation fusion. The method comprises the following steps: carrying out online scanning and segmentation on a laser radar point cloud according to a camera sampling interval; acquiring an initial camera attitude by a laser radar-inertial navigation odometer, and jointly optimizing a re-projection error and a luminosity error through error state iteration Kalman filtering to obtain a refined camera attitude; an octree is adopted to remove map points outside a view cone, survival map points, an image and a refined camera attitude are combined for Gaussian micro rendering, meanwhile, a Gaussian ellipsoid cloning process is improved, the influence of motion blur is eliminated, overlapped fog shadow and back propagation loss are avoided, Gaussian ellipsoid parameters are iteratively optimized, and high-fidelity scene reconstruction is achieved. According to the scene reconstruction method provided by the invention, the problem of insufficient robustness of the traditional SLAM technology in the outdoor environment is improved, and meanwhile, the performance of the 3DGS in the outdoor environment is optimized.

The application discloses a ceramic tile finished product defect automatic identification method and device, an intelligent terminal and a storage medium. The method comprises the following steps: based on a line scanning industrial camera, an image of a ceramic tile finished product is collected, and the image comprises a low-angle light black-and-white image and a high-angle light black-and-white image; the ceramic tile image is preprocessed; based on the preprocessed ceramic tile image, a defect area corresponding to the low-angle light black-and-white image and the high-angle light black-and-white image is obtained according to Fourier transform; and the defect area is input into a trained double-branch neural network model to obtain an identification result of a defect of the ceramic tile finished product. Compared with the prior art, the accuracy of appearance defect identification of the ceramic tile finished product is high.

This application belongs to the field of display panel technology, and provides a pixel control circuit, method, and display panel. The display panel includes multiple pixel units, each pixel unit including a first sub-pixel unit and a second sub-pixel unit. The pixel control circuit includes a first control module, a second control module, and a third control module. The third control module is used to connect the corresponding second sub-pixel unit to the circuit under a specified state, so that the second sub-pixel unit is controlled by a line scan signal and / or a data signal to be in an active state. The specified state includes at least one of a first sub-pixel unit malfunction and jagged edges appearing on the display screen. This application can connect the second sub-pixel unit when the first sub-pixel unit malfunctions, eliminating the bright cross-shaped line phenomenon. Furthermore, when jagged edges appear on the display screen, connecting the second sub-pixel unit can also provide a smooth transition to the jagged state, reducing the jaggedness.