19 results about "Laser scanning" patented technology

The present invention discloses a scattered-point cloud data based hierarchical compression method and apparatus, relates to the field of computer graphics, three-dimensional laser scanning and massive cloud data processing, and solves the problem, in the prior art, of a low compression rate and a low compression speed of scattered-point cloud data processing. The method comprises: according to a height of scattered-point cloud data in a firs direction in a coordinate system, hierarchizing the scattered-point cloud data in the first direction; in a projection coordinate system, determining a coordinate axis, whose coordinate value has the largest transformation, corresponding to the scattered-point cloud data in each hierarchy as a main sorting axis, and sorting the scattered-point cloud data in a projection plane; acquiring sorted scattered-point cloud data, determining a distance between the adjacent scattered-point cloud data, and if a value of the distance between the adjacent scattered-point cloud data is smaller than a scattered-point cloud data compression distance threshold, compressing the adjacent scattered-point cloud data into one point.

The invention provides an intelligent robot and a control method and system thereof. The control method for the intelligent robot comprises the steps that a scene map is constructed according to omni-directional scene data scanned by laser radar, the real-time position of the intelligent robot is displayed on the scene map, and a navigation point task, a path task and a task queue are established;a task to be executed is configured according to the selected navigation point task, the path task and/or the task queue; and the process of the task to be executed is executed, and in the executingprocess of the task to be executed by the intelligent robot, surrounding obstacles of the intelligent robot are detected in real time and are avoided in the obstacle detecting process. According to the intelligent robot and the control method and system thereof, 360-degree omni-directional laser scanning can be carried out on the working environment through the laser radar so as to construct the scene map, and the detection of the obstacles around the robot, automatic positioning and navigation, path planning, path recording and task queue editing can be realized, and the motion precision of the robot can be achieved.

The invention discloses a multi-wavelength femtosecond laser scanning type etching method for a printed circuit board. According to the multi-wavelength femtosecond laser scanning type etching method for the printed circuit board, a femtosecond laser device provided with a frequency doubling module is used as a laser source, and the femtosecond laser device can emit laser beams with different wavelengths so as to etch different layers, made of different materials, on the printed circuit board correspondingly; etching of all the layers of the printed circuit board can be completed on the same station, and machining errors caused by repeated positioning are avoided; meanwhile, more refined line-width etching can also be achieved, so that the printed circuit board is made smaller, lighter and thinner; machining is convenient, and the machining precision and quality are excellent.

A drive control device for use in an image forming apparatus comprises: a cover sensing unit which detects the opening of a cover of the image forming apparatus; a relay unit which controls supplement of a voltage for driving a laser scanning unit; and a relay operation control unit which controls the operation of the relay unit in response to the detected result of the cover sensing unit. Accordingly, the drive control device of the image forming apparatus can control operation of one or more driving motors and the laser scanning unit at low cost.

The invention provides a building deformation monitoring method based on three-dimensional laser point cloud geometric features. The building deformation monitoring method comprises the steps of three-dimensional laser data acquisition, multi-site cloud registration, single building extraction, building line-plane fitting, line-plane geometric parameter extraction, building deformation analysis and the like. According to the building deformation monitoring method based on features, the defects that in an existing method, the requirement for the precision of a three-dimensional laser scanner is harsh, multi-site cloud registration errors are likely to be introduced, and high-precision control point arrangement is needed can be overcome, point cloud distribution information obtained through three-dimensional laser scanning is fully utilized, the advantages of high precision and high stability brought by fitting of a large number of point clouds can be effectively utilized, the geometric features and change information of a building extracted from the three-dimensional point cloud can also reflect the deformation features of the building more visually, and safety monitoring data is effectively provided for construction and management of the building in time.

The invention provides a real-time precise positioning method and a real-time precise positioning device of motor vehicles. The method comprises the following steps: updating motorized displacement and updating measurement. The step of updating the motorized displacement comprises the following steps: taking a starting speed as an initial condition and carrying out integration on an inertial accelerated speed relative to time to obtain a system inertial speed; taking an initial position coordinate as an initial condition and carrying out integration to obtain an initial position; repeating the steps to obtain a continuous navigation coordinate system; and eliminating the deviation between the navigation coordinate system and a vehicle coordinate system to obtain posterior probability. The step of updating the measurement comprises the following steps: carrying out laser scanning on the environment to obtain reflection data; and calculating posterior probability distribution according to the posterior probability, the reflection data and map data information. According to the real-time precision positioning method and the real-time precision positioning device, the technical effects of high positioning precision on the motor vehicles, rapid updating and strong anti-interference capability are realized.

Provided are a multifunctional laser railway track detector and a detection method thereof. The detector comprises a laser scanner, photoelectric sensors, signal processing units, a single chip microcomputer, a gyroscope and a reservoir. The laser scanner and the single chip microcomputer are in electric connection; the photoelectric position sensors and the signal processing units are in electric connection; the signal processing units and the single chip microcomputer are in electric connection; the single chip microcomputer and the gyroscope are in electric connection; the single chip microcomputer and the reservoir are in electric connection. According to the invention, the multifunctional laser railway track detector can measure railway track data even without setting a target, and ensure measurement accuracy without being adjusted level. The gyroscope possesses a function of sensing a horizontal accelerated speed so as to guarantee that the detector can continuously measure for a long distance. According to the invention, complex, tedious, time-consuming, labor-consuming railway measurement operation with low accuracy is converted into simple and labor-saving operation with high precision.

The invention discloses a method for separating a sapphire substrate by unit on basis of stress action, comprising the following steps: adopting a first type of laser to realize the unit isolation of GaN base epitaxy; ensuring the unit independency of the GaN base epitaxy; meanwhile, utilizing a second type of laser to scan the upper tangential stress between the unit sapphire substrate and adjacent non-scanning unit sapphire substrate; and under the combined action of GaN interface nitrogen pressure and the upper tangential stress, separating and removing the sapphire substrate by unit. Thus, laser stripping finished product rate can be obviously improved.

The invention discloses an image tilt correction method and a computer-readable storage medium. The method comprises the following steps: obtaining an inclination angle between a current scanning direction of a laser scanning device and a standard scanning direction; Calculating a trajectory to be scanned in the current scanning direction of the laser scanning device according to the inclination angle and the standard scanning trajectory in the standard scanning direction; According to the trajectory to be scanned, a driving signal corresponding to the trajectory to be scanned is determined, and the laser scanning device is driven based on the driving signal corresponding to the trajectory to be scanned. The above scheme is used to solve the problems existing in the prior art that When thelaser scanning imaging equipment is projected, it has high requirements on the placing environment or the grip mode of the user, which is easy to be disturbed by the external environment and the picture stability is poor. Therefore, the laser scanning imaging equipment can keep the scanning picture stable by controlling the driving signal when the projection angle is tilted due to the external environment disturbance.

The invention discloses a method for observing morphology and functions of lysosomes by using transgenic macrophage expressing GFP or mutants thereof. The method includes steps of separating and cultivating transgenic macrophage suspension expressing GFP or mutants thereof; observing the separated and cultivated macrophage under laser scanning confocal microscopes. The invention further discloses application of the expression GFP or the transgenic macrophage suspension to observing the morphology and the functions of the lysosomes by the aid of the laser scanning confocal microscopes. The method and the application have the advantages that the lysosomes can be observed by using transgenic macrophage expressing GFP or mutants thereof, and accordingly the locations of the lysosomes can be clearly displayed without staining; the ultrastructure morphology, and the quantities and dynamic change of the lysosomes for expressing GFP or the transgenic macrophage of the mutants thereof can be clearly and visually observed by the aid of the laser scanning confocal microscopes; the quantities and the locations of primary lysosomes which are yet to start to realize digestion effects, corresponding substrates in the primary lysosomes and secondary lysosomes which realize digestion effects at the moment or completely realize the digestion effects further can be visually displayed if the substrates are labeled by red fluorescent probes.

The invention relates to the field of material laser processing technologies, in particular to a large-breadth laser hole cutting method for glass, which comprises the following steps of: corroding a material by focusing a laser scanning beam on the lower surface of a glass workpiece; in the rapid scanning process of the focused laser beam, the three-dimensional motion platform drives the glass workpiece to move in an xy plane along a set cutting track to form a large-format kerf, after one-time scanning is completed, the three-dimensional motion platform moves the glass workpiece to move downwards, and the kerf is finally deepened in the glass thickness until the kerf penetrates through the glass; and after the kerf is penetrated, the excess material falls off to form a hole. Aiming at the defect that the current glass laser hole cutting cannot meet the requirement of large breadth, the invention provides a laser cutting method with the advantages of rapid formation of kerfs and large-breadth hole characteristics, and the laser hole cutting breadth is expanded to be more than 1m * 1m, so that the glass large-breadth laser hole cutting scheme can be applied to various glass processing industries.

The invention discloses a programmable laser scanning track device. The scanning track of a laser radar can be programmed. The device comprises three front surface reflectors, three reflector supports, two integrated stepping motors, two motor fixing supports and a base. The device is characterized in that by utilizing the characteristics of a wide coverage range and ultrahigh reflection efficiency of a reflection wave band of the front reflector and strong stability and high accuracy of rotation of the stepping motor, light beams are deflected in different directions at two positions of 1 and 2; and position points obtained according to a Bresenham algorithm are converted into corresponding pulse signals through an STM32 to control stepping motors at the position 1 and the position 2 respectively, and a laser scanning track is programmed. Different scanning tracks, scanning angles and laser point densities can be selected according to different requirements, the applicable laser wave band is wide, and the scanning precision is high. The scanning device is stable in operation, good in heat dissipation effect and capable of keeping high-precision scanning work for a long time.

The invention provides an auxiliary positioning system for reflective stickers. The auxiliary positioning system comprises a plurality of reflective stickers and a mobile platform. The reflective sticker is arranged in a navigation space. The mobile platform comprises a map establishing module, a positioning module, a laser scanning analysis module, a coordinate processing module, a judgment and comparison module and a correction module. The map establishing module is used for establishing a full-area map corresponding to the navigation space. The positioning module is used for positioning a positioning coordinate. The laser scanning analysis module is used for scanning the navigation space and obtaining a scanning azimuth distance coordinate of the reflective sticker relative to the mobile platform. The coordinate processing module forms a positioning azimuth distance coordinate according to a sticker point coordinate and the positioning coordinate. The judgment and comparison modulecompares the scanning azimuth distance coordinate with the positioning azimuth distance coordinate, and corrects the positioning coordinate through the correction module.

The invention discloses an automatic installation robot for construction engineering, comprising a machine body, wherein the machine body comprises a base, an optical measuring instrument and an automatic mechanical arm are arranged on the base; one end, away from the base, of the automatic mechanical arm is provided with a gripping device; a storage battery is arranged in the base; a laser scanner is arranged on the base; an infrared distance sensor and a main control module are also arranged on the base; and the optical measuring instrument, the laser scanner and the infrared distance sensorare respectively and electrically connected with the main control module. The automatic installation robot provided by then invention has the characteristics of simple structure, convenient operationand high installation precision.

A method of laser beam alignment in a laser scanning system comprising: providing an elongated planar mirror having left and right ends for directing a laser beam scan line to a scan line imaging region spaced from the mirror; detecting left and right spots of the laser beam scan line to determine whether the laser beam is aligned in the imaging region, and if it is not; first rotating the elongated mirror about a first axis extending along the scan line direction of the mirror until the right spot is detected; second rotating the mirror about a second axis located near the right end of the mirror, the second axis extending in the plane of the mirror at angle to the first axis until the left spot is detected.

The invention discloses a navigator attitude adjustment method and system for an automatic guided transport vehicle. Current attitude information of a laser scanning navigator is collected; the targetposition of the laser scanning navigator is set to be in a horizontal state; relative position information of the laser scanning navigator attitude information and the horizontal state is calculated;and acceding to the relative position information, the position of the laser scanning navigator is adjusted to be in a horizontal state by using a feedback adjustment control algorithm. Therefore, the laser scanning navigator is kept to be in a horizontal state and can kept a horizontal state even on an uneven road surface; the number of reflective barrels scanned in real time is ensured; and theaccuracy of the positioning of the laser scanning navigator is improved.

The invention provides a high-resolution differential confocal imaging system and method based on tangential polarized light. A liquid crystal spatial light modulator and a tangential polarization converter are introduced into a laser spot scanning confocal imaging illumination light path, tangential polarized light is introduced into the illumination light path through the tangential polarizationconverter, firstly, a uniform phase is introduced into the liquid crystal spatial light modulator, primary confocal imaging is carried out, and a first image is obtained; by introducing a 0-2pi spiral phase on the liquid crystal spatial light modulator and performing confocal imaging again, a second image is obtained, a high-resolution differential confocal image based on the tangential polarizedlight can be obtained according to the first image and the second image, and the spot size of the point spread function of the high-resolution differential confocal image based on the tangential polarized light is remarkably smaller than that of a point spread function during conventional laser scanning confocal microscopic imaging, so that the high-resolution differential confocal image has highimaging resolution, and the defects of artifacts and the like caused by an image processing method are avoided.