54 results about "Laser methods" patented technology

The application relates to a laser SLAM method and system based on height information. The method comprises the following steps: acquiring three-dimensional laser radar data, performing motion distortion and dynamic point filtering processing to obtain first point cloud data; acquiring robot IMU data, performing pre-integration processing to obtain first pose data; extracting features from the first point cloud data to obtain feature point cloud, recording the height of the feature point cloud, and obtaining laser radar odometry data according to the feature point cloud and the height of the feature point cloud; fusing the first pose data and the laser radar odometry data based on a factor graph to obtain second pose data as the robot pose; and determining corresponding point cloud data according to the second pose data and splicing to generate a three-dimensional point cloud map. The application can enable the robot to realize high-precision self-positioning and high-precision mapping in an unfamiliar cluster point scene.

The present invention provides an optoelectronic interconnection packaging structure and a preparation method therefor. The method comprises: using a laser method, forming a first blind hole and a second blind hole, the bases of the first blind hole and the second blind hole being in a glass substrate, then performing thinning processing on a first surface of the glass substrate and a second surface of the glass substrate, to form a first through hole and a second through hole, respectively, that are arranged in an offset manner. On the basis of the laser method and the thinning processing, the present application can prepare a high-performance TGV adapter plate on a glass substrate that has a relatively small pitch and a relatively small CD size, is thin and suitable for high-density arrangement, and can effectively prevent metal posts from overlapping. In addition, an optical waveguide layer is disposed between the glass substrate and a rewiring layer, and the TGV adapter plate is used to connect an electrical chip and an optical chip, which can make metal wiring more flexible, achieve photoelectric interconnection integration, reduce package size, lower power consumption, and improve reliability. The application is thus applicable to high-density integrated packaging, and can achieve good optoelectronic signal transmission.

The invention discloses a single-line laser SLAM (Simultaneous Localization and Mapping) method based on visual inertia enhancement, which belongs to the technical field of multi-sensor fusion localization, and comprises the following steps: firstly, extracting point-line features from an input image, detecting angular points of the point features by adopting a Shii-Tomasi algorithm, tracking and matching feature points by adopting a KLT optical flow algorithm, extracting the line features by adopting a proposed self-adaptive threshold line segment extraction algorithm, and extracting a single-line laser SLAM (Simultaneous Localization and Mapping) algorithm; calculating an LBD descriptor, then matching and tracking line features, and in front-end pose estimation, carrying out tight coupling on a re-projection error of point-line features and an IMU pre-integration error, and constructing a sliding window optimization framework. A high-frequency pose output by the vision-inertia module is used as a priori initial value of laser radar point cloud registration, and distortion correction is performed on laser point cloud, so that the local optimum problem of laser SLAM in a rapid motion or feature degradation scene is effectively solved; line features are extracted from the laser point cloud, laser line feature errors and IMU pre-integration errors are jointly optimized, and registration precision and robustness in a structured environment are improved.

The invention provides a 3D laser SLAM method and device based on optimized loopback detection and a medium, and relates to the technical field of simultaneous positioning and mapping of robots, and the method comprises the following steps: (1) a data preprocessing step: receiving original data of an IMU and a laser radar Lidar, and carrying out the denoising and time synchronization processing; (2) a feature extraction and map construction step: extracting angular point and surface point features from the preprocessed data, performing pre-integration on IMU data to obtain an initial pose, and performing registration on a current Lidar point cloud and a local map to construct a global map; (3) loopback detection: generating an enhanced descriptor based on the key frame point cloud, and constructing a KD-Tree structure with dynamic resolution for storage and indexing; and carrying out rough search on loopback candidate frames by inquiring the KD-Tree, carrying out two-stage pose matching on the candidate frames to confirm loopback, and dynamically distributing the weight of loopback constraint according to the environmental complexity. The loopback detection success rate can be improved, and dynamic scene mapping drift is reduced.

The invention provides a photoelectric interconnection packaging structure and a preparation method thereof, and the method comprises the steps: forming a first blind hole and a second blind hole of which the bottoms are located on a glass substrate through a laser method, and then carrying out the thinning process from a first surface of the glass substrate and a second surface of the glass substrate, thereby forming a first through hole and a second through hole which are formed in a staggered manner, according to the invention, the high-performance TGV adapter plate which is small in spacing, small in CD size, thin, suitable for high-density setting and capable of effectively avoiding overlapping of metal columns can be prepared on the glass substrate based on a laser method and a thinning process; furthermore, an optical waveguide layer is arranged in the glass substrate and the rewiring layer, and an electric chip and an optical chip are connected by combining a TGV adapter plate, so that the metal wiring is more flexible, the photoelectric interconnection integration is realized, the packaging size is reduced, the power consumption is reduced, the reliability is improved, the optical waveguide layer is suitable for high-density integrated packaging, and good photoelectric signal transmission can be realized.

Provided are a post-processing device and a recording system, which can appropriately perform post-processing even when a recording device is replaced with a recording device of a different recording method without replacing the post-processing device. A control section can acquire, as information related to a recording device, first information that can specify that the recording method of the recording device is an inkjet method and second information that can specify that the recording method of the recording device is a laser method. The control section acquires information related to the recording device, performs post-processing based on a first setting when the information related to the recording device includes the first information that can specify the inkjet method, and performs control related to post-processing based on a second setting different from the first setting when the information related to the recording device includes the second information that can specify the laser method.

The invention provides a particulate matter concentration detection method and equipment. The particulate matter concentration detection method is applied to the particulate matter concentration detection equipment, and the particulate matter concentration detection equipment comprises beta-ray method equipment and a laser method module. The method comprises the following steps: the laser method module detects the input particulate matter concentration, outputs real-time detection data, and outputs first detection data according to the real-time detection data; the beta-ray method equipment detects the input particulate matter concentration and outputs second detection data; obtaining a calibration relationship according to the second detection data and the first detection data, and calibrating the real-time detection data according to the calibration relationship to obtain the particulate matter standard concentration data. According to the method and the device, the real-time performance and the accuracy required by particulate matter concentration detection can be met at the same time, and the accuracy and the timeliness of particulate matter concentration detection are improved.

The invention discloses a derusting gel aiming at heavily rusted steel and a derusting method of gel cooperating with continuous laser, and belongs to the technical field of steel derusting. Mixing a copper chloride solution and a thiourea solution, stirring to obtain white gel, adding concentrated hydrochloric acid, mixing and stirring to obtain rust removal gel; 0.2-0.5 wt% oxalic acid solution is sprayed to the surface of the rusted steel, 0.5-1.0 wt% ammonium bicarbonate solution is sprayed 10-20 min later, and a laser cleaning machine is adopted to conduct wet-type continuous laser pretreatment on the surface 1-5 min later; and the surface of the pretreated steel is coated with rust removal gel, and after coating is conducted for 15-30 min, continuous laser rust removal is conducted on the surface through a laser cleaning machine. When gel rust removal and continuous laser rust removal are cooperatively combined, the advantages of a chemical method and the advantages of a laser method can be exerted, the purpose of efficiently removing corrosion products on the surface of the heavily-corroded steel plate in a short time is achieved, and basically no damage is caused to a steel base body.

This invention provides a method for manufacturing a diamond wire saw for cutting silicon carbide single-crystal substrates. First, impurities are removed from the diamond micro-powder abrasive. During the abrasive application process, the abrasive density *a* on the steel wire is monitored in real-time via images and videos, and the feeding rate of the diamond micro-powder abrasive in the feeding container is controlled accordingly, achieving a first-step closed-loop control. In the subsequent nickel plating thickening process, the concentricity of the thickened layer on the steel wire and the continuous stability of its thickness are controlled. Before winding, the wire saw diameter *d* is measured using a laser method. Based on the mapping relationship between the wire diameter *d*, abrasive density *a*, and plating thickness *c*, a second closed-loop control is implemented for the entire wire saw production process. The two closed-loop controls operate nested together, ensuring precise control throughout the entire process. The diamond wire saw obtained by this method exhibits high continuous stability in various performance indicators, ensuring good process stability during the cutting of single-crystal silicon carbide substrates, thereby reducing cutting risks.

This invention relates to a laser SLAM method and system that integrates visual loop closure detection. The method includes: S1: acquiring laser point cloud data using a 3D LiDAR and constructing laser point cloud keyframes, and using these keyframes to obtain current positioning information; S2: registering the point cloud data contained in each laser point cloud keyframe to the world coordinate system to obtain a global point cloud map; S3: acquiring visual images using a visual camera and fusing the laser point cloud keyframes to construct point cloud-image fusion keyframes to detect loop closure information. When a loop closure is detected, the corresponding loop closure constraint and loop closure trajectory are obtained; S4: establishing a pose graph model based on all point cloud-image fusion keyframes on the loop closure trajectory, and optimizing the pose graph model using loop closure constraints as constraint edges to obtain optimized point cloud-image fusion keyframes to update the current positioning information and the global point cloud map. The method and system provided by this invention can improve the accuracy of positioning and mapping in laser SLAM systems.

Method (1) for laser processing of a glass or glass-ceramic element (2), in which: - the laser beam (7) of an ultrashort pulse laser (10) is concentrated to an elongated focus in the glass or glass-ceramic element (2) by means of a focusing optic (3), wherein: - a pulse power of the ultrashort pulse laser (10) is set which is sufficient to generate filament-shaped damage (6) within the glass or glass-ceramic by means of the laser pulses focused in the glass or glass-ceramic, wherein the focusing optic (3) comprises a lens (4) arranged in the beam path of the ultrashort pulse laser (10), and wherein: - by means of a lens movement device (9), during operation of the ultrashort pulse laser (10), the lens (4) is moved transversely to the beam direction (70) so that the position of the optical axis (40) of the lens (4) relative to the position of the laser beam (7) is changed.and the movement of the lens (4) relative to the laser beam (7) deflects the laser beam (7) and thus shifts the point of impact (71) of the laser beam on the glass or glass-ceramic element (2), wherein the point of impact (71) is guided along a predetermined path forming a dividing line (12) by means of a computing device (15), wherein the lens movement device (9) is controlled by successively emitting control signals, wherein, in response to the successively emitted control signals, the lens (4) of the focusing optics (3) is moved transversely to the beam direction (70), so that the position of the optical axis (40) of the lens (4) changes relative to the position of the laser beam (7), thereby moving the point of impact (71) of the laser beam (7) on the glass or glass-ceramic element (2),wherein- by means of a movement device (17) the glass or glass-ceramic element (2) is moved relative to the ultrashort pulse laser (10) during the incident laser beam (7), so that the point of impact (71) of the laser beam (7) is guided along a predetermined path forming the dividing line (12), which is formed by the superposition of the positions set by means of the lens movement device (9) and the movement device (17), wherein- by the movement of the lens (4) deviations of the point of impact (71) from the predetermined dividing line (12) caused by undesired movement of the glass or glass-ceramic element (2) relative to the ultrashort pulse laser (10), in particular by vibrations or overshoot, during a change of direction of movement are compensated.

A method of dividing, into a plurality of units, a glass substrate including a glass core, an upper stack stacked on a top surface of the glass core, and a lower stack stacked on a bottom surface of the glass core, includes a stack removal operation of removing an upper stack and a lower stack of a division target region along a predetermined line by using a laser, a laser perforation operation of perforating the glass core along the predetermined line by using the laser, and a physical or laser breaking operation of dividing the glass substrate on which the perforation operation is performed, into the plurality of units by using a physical or laser method.

According to the photoelectric interconnection packaging structure and the preparation method thereof provided by the invention, the TGV metal columns and the optical waveguide layers are prepared in the glass substrate based on a laser method, and the composite optical waveguide substrate with the interconnected TGV metal columns and the laminated optical waveguide layers is prepared after stacking and bonding, so that the layout of multiple layers of optical waveguides can be realized based on the TGV adapter plate; high-density and high-performance integration of an electric chip and an optical chip is realized, the packaging size is reduced, the power consumption is reduced, the reliability is improved, and good photoelectric signal transmission is realized.

The invention relates to the technical field of ferroelectric materials, in particular to a ferroelectric functional film and a preparation method thereof. The method comprises the following steps: depositing a target material on a substrate by adopting a pulse laser method, and carrying out post-treatment after deposition to obtain a ferroelectric functional film; the target material comprises one or two of a lead titanate target material and a strontium titanate target material. By changing technological parameters in the pulse laser deposition process, accurate control over the domain structure of the ferroelectric film is achieved, and the high-density and small-size domain structure is formed. The high-density domain structure obviously improves the physical properties such as piezoelectricity, dielectricity and the like of the ferroelectric film, and provides a material basis for high-performance electronic devices. The ferroelectric film prepared by the technology has potential application value in the field of high-density information memories, and is expected to solve the problem of density limitation in the existing storage technology.

The invention provides a photoelectric interconnection packaging structure and a preparation method thereof, and the method comprises the steps: forming a first blind hole and a second blind hole of which the bottoms are located on a glass substrate through a laser method, and then carrying out the thinning process from a first surface of the glass substrate and a second surface of the glass substrate, thereby forming a first through hole and a second through hole which are formed in a staggered manner, according to the invention, the high-performance TGV adapter plate which is small in spacing, small in CD size, thin, suitable for high-density setting and capable of effectively avoiding overlapping of metal columns can be prepared on the glass substrate based on a laser method and a thinning process; furthermore, the optical waveguide layers are arranged on the two faces of the glass substrate, and the electric chips and the optical chips are connected in combination with the TGV adapter plate, so that metal wiring is more flexible, photoelectric interconnection integration is achieved, the packaging size is reduced, the power consumption is reduced, the reliability is improved, the optical waveguide layer is suitable for high-density integrated packaging, and good photoelectric signal transmission can be achieved.

A pavement texture depth measurement apparatus and measurement method, which effectively solve the problems of a sand-spreading method having a relatively large error and a laser method having a principle defect. Compared with a traditional a sand scraping method, carrying fine sand by means of water flows into pavement cracks make the pavement gaps be more fully filled; compared with a traditional manner in which the amount of sand is measured in advance and in which scraping and leveling are performed, using the amount of fine sand reduced in a sand storage chamber (4) as the volume of the fine sand in the pavement gaps eliminates the artificial subjective judgment for a scraping and leveling state, and therefore the amount of sand is more rationally measured. In addition, the amount of sand reduced in the sand storage chamber (4) is calculated by means of the change in air pressure, such that a tiny change in the volume can be accurately measured; moreover, since the spreading area of the fine sand is defined as a constant value by using a cylinder body (1), a more rational and accurate amount and area of sand can be obtained, and thus a more accurate measurement result is obtained.

In view to the problem that laser SLAM is completed based on static assumption, and a large number of dynamic residues are generated in the environment containing dynamic obstacles, resulting in the decline of mapping and positioning accuracy, the application discloses a laser SLAM method for solving dynamic residues.The method comprises the following steps: firstly, the point cloud data acquired by the laser radar is divided into grids; then, the ground points are separated, and the non-ground points are clustered to remove noise, the initial pose is judged by using the IMU information and the point cloud information, and if the IMU initialization fails, the laser odometry mode is run; finally, the growing height descriptor is introduced, the suspected dynamic residue area is acquired, and the acquired dynamic residues are removed by using the space-time constraint. The application removes the noise by clustering, introduces the growing height descriptor and the space-time constraint to remove the dynamic residues, improves the mapping and positioning accuracy, and solves the influence of dynamic obstacles on mapping.

The application discloses a kind of laser method gas concentration analyzers, it is related to gas monitoring technical field, including analyzer body and the control panel of fixed in the front surface of analyzer body, further including protective cover, its front end opening, and cover set in the outside of the analyzer body, the insertion slot for the edge of control panel insertion is vertically opened in the both sides of the protective cover, check anti-escape component, its elasticity is installed in insertion slot and is matched with the clamping of control panel, normally prevent the analyzer body from moving upwards, release lifting assembly, it is installed in protective cover and is used to carry the analyzer body.The application is protected by setting the protective cover outside the analyzer body, the insertion slot is opened in the both sides of protective cover for the edge of control panel insertion, in normal state, the clamping cooperation between check anti-escape component and control panel reliably locks the analyzer body in protective cover, prevents it from accidentally escaping, when needing maintenance, directly operating release lifting assembly.

The invention discloses a trackless navigation method and device in a transformer substation based on multi-source data fusion, particularly relates to the technical field of mobile robot navigation, and is used for solving the problems of positioning drift and map distortion caused by difficulty in distinguishing a static structure and dynamic interference in a complex dynamic environment of the transformer substation in an existing laser SLAM (Simultaneous Localization and Mapping) method. Laser point cloud and visual semantic information are fused, dynamic feature identification and filtering are carried out in combination with equipment operation parameters, and then the pose calculation precision is improved. Environment point cloud and image data are collected, and geometric features and semantic tags are extracted respectively; performing motion trail tracking and frequency domain analysis on the feature points, extracting dominant frequency, performing correlation measurement by combining equipment parameters, and generating a dynamic feature mask; finally, dynamic interference is filtered out after motion vector clustering and consistency optimization, and static features are input into an SLAM algorithm to complete stable and reliable robot pose calculation.

The application provides a laser method for large-span bridge height measurement point cloud density self-adaption. Firstly, 360-degree rapid scanning is carried out at a given station to obtain full-field information, and the TLS station pose is estimated by registering the scanning point cloud with the known design model; the measurement object is labeled in the design model in advance, the preset scanning point spacing requirement value is set, the minimum angular resolution of each point of the measurement object is solved based on the laser beam propagation principle, the measurement object point cloud is grouped according to the minimum angular resolution and the angular coordinate, and the angle range and the minimum angular resolution of each group of point sets are extracted; according to the grouping information of the measurement object point cloud, the sectional fine scanning with variable angular resolution is carried out to obtain the measurement object point cloud model, which is used for geometric measurement. The application can significantly improve the scanning efficiency in a large scene and reduce the point cloud volume.

The invention provides a photoelectric interconnection packaging structure and a preparation method thereof, a first through hole penetrating through a glass substrate from top to bottom is formed by adopting a first laser method, a second through hole penetrating through the glass substrate from bottom to top is formed by adopting a second laser method, and the formed second through hole and the first through hole are arranged in a staggered manner. Therefore, the high-performance TGV adapter plate which is small in spacing, suitable for high-density setting and capable of effectively avoiding overlapping of the metal columns can be prepared on the glass substrate based on the laser method; furthermore, the optical waveguide layers are arranged on the two faces of the glass substrate, and the electric chips and the optical chips are connected in combination with the TGV adapter plate, so that metal wiring is more flexible, photoelectric interconnection integration is achieved, the packaging size is reduced, the power consumption is reduced, the reliability is improved, the optical waveguide layer is suitable for high-density integrated packaging, and good photoelectric signal transmission can be achieved.

A part (27) 3D printed by a pulsed laser device (200). The part has a predetermined feature that includes a plurality of 3D prints (29) and voids in a mesh pattern. The mesh pattern has a plurality of locations disposed along a series of substantially parallel rows, and each location includes a 3D print or a void. A pulse from the pulsed laser device forms the 3D prints, and an absence of the pulse forms the voids. The pulsed laser device is controlled by a computing device that sends a packet of instructions to the pulsed laser device, the packet of instructions comprising at least two instructions, each single instruction notifying the laser (20) to pulse or not pulse, thereby creating a 3D print or void at each location on the mesh pattern, respectively.

An optoelectronic interconnection packaging structure and a preparation method therefor. A first through via (101) penetrating through a glass substrate (100) from top to bottom is formed by using a first laser method, and a second through via (102) penetrating through the glass substrate (100) from bottom to top is formed by using a second laser method; and the formed second through via (102) and the formed first through via (101) are arranged in a staggered manner, so that a high-performance TGV interposer having a small spacing, being suitable for high-density configuration, and effectively preventing overlapping of metal pillars can be prepared on the glass substrate (100) on the basis of a laser method. Furthermore, an optical waveguide layer is arranged within the glass substrate (100) and a redistribution layer, and an electrical chip (701) is connected to an optical chip (702) by means of the TGV interposer, such that metal wiring can be more flexible, and optoelectronic interconnection integration can be realized, thereby reducing packaging size, reducing power consumption, and improving reliability. Moreover, the present invention is suitable for high-density integrated packaging, and can realize good optoelectronic signal transmission.

Systems and methods for performing laser cataract surgery, for using a biometric system to determine a material property of a structure of the eye, laser pulses in a laser shot pattern having different powers. A therapeutic laser, and laser delivery system having the capability to vary the power of the laser beam.

The present invention relates to a range finder which measures a distance to a target after properly setting a zoom magnification of a camera to aim at the target in a captured preview image on the basis of a distance calculated using the GPS method of a combination of a global positioning system (GPS) method and a laser method.

Systems and methods for performing laser cataract surgery, for using a biometric system to determine a material property of a structure of the eye, laser pulses in a laser shot pattern having different powers. A therapeutic laser, and laser delivery system having the capability to vary the power of the laser beam.

The application belongs to the technical field of nanometer material preparation, and particularly relates to a single-wall carbon nanometer tube, a preparation device thereof and a preparation method thereof. The device comprises a reaction furnace, a laser generating system, a target material supply system and a control system. The laser generating system adopts a low-cost and long-life optical fiber laser array to form a large-area irradiation area; the target material supply system continuously transports a graphite composite target material doped with a specific binary metal catalyst to the irradiation area through a linear track. Under an inert atmosphere and high temperature, the optical fiber laser array is used to evaporate the composite target material containing hafnium (Hf) and iron-based transition metals, carbon atoms are catalytically induced to self-assemble, and single-wall carbon nanometer tubes are continuously grown. Through the cooperation of the low-cost laser source, the hafnium-based catalyst and the continuous feeding system, the problems of expensive equipment, low yield, difficult tube diameter control and intermittent production of the traditional laser method are solved, and the low-cost, large-batch and continuous preparation of high-quality single-wall carbon nanometer tubes is realized.

This invention discloses a method for opening circuit boards using discontinuous laser technology. The method includes a laser step to form a discontinuous groove structure on a first surface of a first stacked structure using laser technology; a peelable film placement step to place a peelable film on the first surface; a pressing step to press a second stacked structure and a third stacked structure onto the first and second surfaces, respectively; a blind trench formation step to form a blind trench connected to the discontinuous groove structure; a windowing step to remove a portion of the first stacked structure and a portion of the third stacked structure along the blind trench; and a removal step to remove the peelable film to form a circuit board structure. This discontinuous laser method for opening circuit boards improves upon existing methods that suffer from insufficient accuracy.

According to the TGV adapter plate and the preparation method thereof provided by the invention, a first blind hole with the bottom positioned on a glass substrate is formed by adopting a first laser method, a second blind hole with the bottom positioned on the glass substrate is formed by adopting a second laser method, and then a thinning process is respectively carried out from a first surface of the glass substrate and a second surface of the glass substrate; the first blind hole is converted into the first through hole, the second blind hole is converted into the second through hole, and the formed first through hole and the formed second through hole are arranged in a staggered manner, so that the preparation method can be used for preparing a thin glass substrate with a small distance, a small CD size, high density setting and high density setting on the glass substrate based on a laser method and a thinning process. And the high-performance TGV adapter plate can effectively avoid overlapping of the metal columns.