63results about How to "Large scanning range" patented technology

System and method for charged particle beam. According an embodiment, the present invention provides a charged particle beam apparatus. The apparatus includes a charged particle source for generating a primary charged particle beam. The apparatus also includes at least one condenser lens for pre-focusing the primary charge particle beam. Furthermore, the apparatus includes a compound objective lens for forming the magnetic field and the electrostatic field to focus the primary charged particle beam onto a specimen in the charged particle beam path. The specimen includes a specimen surface. The compound objective lens includes a conical magnetic lens, an immersion magnetic lens, and an electrostatic lens, the conical magnetic lens including an upper pole piece, a shared pole piece being electrically insulated from the upper pole piece, and an excitation coil.

A radar device transmits electromagnetic waves while scanning a detection area in a scan direction and detects an object in each of detection regions into which the detection area is partitioned in the scan direction. The radar device sets a continuous waveform of signal intensity of scan positions from data on the signal intensity of reflected waves individually from the detection regions and extracts a peak from the continuous waveform. A threshold value is set based on signal intensity at the extracted peak, and the scan positions are determined on both sides of the peak at which the signal intensity is equal to the threshold value as positions of both ends of the object in the scan direction.

The invention discloses a method for simultaneously measuring distribution of a high-temperature gas two-dimensional transient temperature field and concentration field based on a hyper spectrum, and belongs to the technical field of laser absorption spectrums. The method comprises the steps that a laser array is distributed on a high temperature area to be measured, hyper spectrum scanning is carried out on the area to be measured, an area temperature field and a vapor concentration field are measured through the spectral absorption of vapor characteristic spectral lines, and meanwhile the distribution of a gas concentration field is measured through the characteristic spectrum absorption of other gas. Grid scattering is carried out on the area to be measured in measurement, laser beams are distributed on the rows and columns of a grid respectively, broadband spectrum scanning is carried out on the characteristic spectral line of gas to be measured, and the inversion of the temperature field and the gas composition concentration field is achieved through a spectrum absorption rate obtained through the scanning with the help of an intelligent optimization algorithm.

The invention discloses a multifunctional cone-beam CT imaging system, and belongs to the technical field of CT imaging. The multifunctional cone-beam CT imaging system comprises a main rotating table, an auxiliary rotating table, a flat panel detector frame and an X-ray light source, wherein the main rotating table is provided with horizontal moving devices, the auxiliary rotating table is provided with a vertical moving device, and the flat panel detector frame is provided with a horizontal transverse moving device. The central axis of the main rotating table coincides with the central axis of the auxiliary rotating table. The two horizontal moving devices at the two ends of the main rotating table are connected with the flat panel detector frame and the X-ray light source respectively. The multifunctional cone-beam CT imaging system can achieve high-precision movement with the six degrees of freedom, can achieve two scanning modes of cone-beam CT imaging device rotation and imaging object rotation, the two scanning modes of axis scanning and spiral scanning, and the functions of online real-time adjustment of imaging geometric parameters, has the outstanding advantages of being large in scanning range, flexible and variable in imaging geometric parameters and the like and is applicable to application occasions of cone-beam CT imaging experiments and CT detection for various purposes.

The invention discloses a method combining hyper-spectrum and wavelength modulation for simultaneous measurement of high-temperature gas two-dimensional transient temperature field and concentration field. The method includes: arranging a laser array in a to-be-measured high-temperature area, and conducting hyperspectral scanning on the to-be-measured area to obtain water vapor absorption spectral line information, and carrying out demodulation with a digital phase lock technology to obtain each harmonic signal, then conducting background deduction first harmonic normalization processing, extracting the maximum amplitude value of the signal to measure regional temperature field and water vapor concentration field, and during measuring, conducting grid discretization treatment on the to-be-measured area, arranging laser beam at each row and each column of the grid to conduct broad spectrum scanning on the characteristic spectral line of the to-be-measured gas under a wavelength modulation mode, and using intelligent optimization algorithm to realize inversion of the temperature field and gas concentration field. The measurement method provided by the invention combines hyper-spectrum and wavelength modulation spectroscopy technologies, and is especially suitable for monitoring of high-temperature gas two-dimensional temperature field and concentration field on harsh industrial sites.

A optical system for a viewing instrument with a variable direction of view is disclosed generally comprising shaft, first and second reflectors located at the distal end of the shaft, where the first reflector rotates about an axis angularly offset from the longitudinal axis of the shaft, and an entrance pupil positioned in the optical path created by the reflectors and preceding the reflecting surface of the second reflector. In certain embodiments, the entrance pupil comprises an aperture stop positioned between the first and second reflectors. In some embodiments, the system includes negative and positive lenses located adjacent the entrance and exit faces of the first reflector.

A small optical resolution photoacoustic microscope based on a micro-electromechanical scanning galvanometer belongs to the technical fields of automatic control and imaging. The small optical resolution photoacoustic microscope includes a light source assembly, a single-mode fiber coupling assembly, a light beam scanning assembly, a reflective support 4-1, a signal acquisition assembly and a computer, the computer controls pulsed laser emitted from the light source assembly to be collimated by the single-mode fiber coupling assembly and then enter the light beam scanning assembly, the light beam scanning assembly includes the micro-electromechanical scanning galvanometer 3-4 and a function generator 3-5, the computer controls the micro-electromechanical scanning galvanometer 3-4 to rotatethrough the function generator 3-5, the pulsed laser entering the light beam scanning assembly is reflected by the micro-electromechanical scanning galvanometer 3-4, and reacts with a target object through the reflective support 4-1 in order to generate a photoacoustic signal, and the photoacoustic signal is reflected by a light-transmitting and acoustic-reflecting sheet, is acquired by the signal acquisition assembly, is transmitted to the computer, and is stored and processed. The small optical resolution photoacoustic microscope has the advantages of small size, light weight, wide scanningrange and high scanning precision.

The invention provides a lidar device and a mobile robot. The lidar device comprises a lidar sensor, a rotating platform and a base. The lidar sensor is arranged above the rotating platform. The baseis used for bearing the rotating platform. An adjustment device is arranged between the lidar sensor and the rotating platform. The adjustment device is configured to drive the lidar sensor to rotatearound a first axial direction, wherein the first axial direction is parallel to the rotating platform. The adjustment device is arranged between the lidar sensor and the rotating platform so that thelidar sensor can be adjusted in the vertical direction to realize scanning in three-dimensional space, the scanning range of the lidar device is wider, other lidar devices are not required, the manufacturing cost is obviously reduced in comparison with the multi-line lidar device, and the technical problems of small scanning range of the single-line lidar device and high manufacturing cost of themulti-line lidar device in the prior art can be overcome.

The invention relates to a digital coal stocktaking system comprising a laser scanning module, a spatial positioning module, an intelligent data acquisition module, a data transmission module, and a terminal processing module. The laser scanning module sends acquired surface shape information of a measured object to the intelligent data acquisition module. The spatial positioning module sends acquired spatial position acquisition of a bucket wheel machine to the intelligent data acquisition module. The intelligent data acquisition module sends the surface shape information and the spatial position acquisition to the terminal processing module through the data transmission module. The terminal processing module obtains the surface shape and three-dimensional coordinate data of the measured object according to the surface shape information and the spatial position acquisition, and then carries out three-dimensional modeling and displaying on a coal pile. According to the invention, a coal stocktaking instrument mounted on a portal frame is wide in range of scanning, and is not constrained by the coal height of a coal yard in scanning. A GPS differential system for spatial positioning and the wireless network transmission technology are adopted. Compared with other schemes, the positioning accuracy and the real-time performance of data transmission can be better guaranteed.

The invention discloses a rapid opto-acoustic/ultrasonic sector-scanning imaging device with a large view field and high resolution and a method for the same. The device comprises an integral probe, a laser emission module, a delay module, an ultrasonic emission/reception module, a signal collection module, and a computer control and image rebuilding module. Through electric and mechanical connection of the modules, large-scale tomography of an opto-acoustic mode and an ultrasonic mode can be achieved. According to the invention, a hollow focus-type ultrasonic detector is adopted, so that opto-acoustic and ultrasonic coaxial performance is achieved, and system resolution and detection sensitivity are enhanced; and a micro galvanometer sector scanning mode is adopted, so that large-scope rapid opto-acoustic/ultrasonic sector-scanning imaging is achieved. The device and the method belong to the technical field of biomedical images and non-destructive detection.

The invention discloses a visual target tracking method of a bionic retina, and belongs to the field of photoelectric target tracking. According to the invention, the variable resolution characteristic of bionic retina imaging is mainly utilized, and the field of view is mapped to the logarithm polar coordinates for target tracking. Firstly, logarithm polar coordinate mapping imaging of a bionic retina is utilized, a target tracking algorithm is improved through the staring effect of a fovea centralis, the information compression effect of an edge and real-time parameters, redundant data are compressed, detail information of an interested target is enhanced, and the information acquisition efficiency in a view field range is improved. And meanwhile, target information in a scene is accurately grasped by utilizing singular points and imaging threshold judgment, and the reliability of target screening is improved. And finally, real-time target tracking is realized by comparing an eccentricity judgment algorithm with higher speed with the motion control module. Compared with a traditional method, under the condition of a large field of view and high resolution, real-time target tracking is achieved on the basis of a bionic retina vision mechanism, efficiency is higher, and precision is higher.

The invention discloses file scanning equipment having a voice broadcasting function. The file scanning equipment comprises a cover body and a main body; one sides of the cover body and the main body are connected through a hinge; the other sides of the cover body and the main body are movably connected through a locking device; a photographing module is arranged in the main body; the photographing module comprises a scanning camera, a storage and a photographing processor; the mobile device is arranged on the main body; the mobile device comprises a U-shaped sliding rail; a fixed block and a first motor are respectively arranged at two sides of the U-shaped sliding rail; a ball screw is arranged between the fixed block and the first motor; a sliding block in threaded connection with the ball screw is arranged on the ball screw; a bracket is arranged on the sliding block; a second motor is arranged at one side of the bracket; the rotating shaft of the second motor is connected with a connection shaft; and the scanning camera is installed on the connection shaft. According to the invention, the scanning camera is placed on the mobile device; the scanning camera is driven by the first motor to move bilaterally and driven by the second motor to rotate vertically; therefore, files can be comprehensively scanned; the scanning range is wide; the number of scanning dead angles is reduced; multiple files can be scanned for one time; and thus, the scanning efficiency is high.

The invention discloses a laser scanning vehicle separating device integrated with an automobile axle recognition function and an implementation method. The vehicle separating device comprises a mounting bracket, a rotary reflecting module, a distance measuring module, an image processing and analysis module, a main control module and a power supply module, wherein the rotary reflecting module, the distance measuring module, the image processing and analysis module, the main control module and the power supply module are mounted in a shell; a laser emitter is induced to emit a pulse laser beamthrough an electric pulse signal, the pulse laser beam is converted into a laser beam array through the rotary reflecting mechanism so as to achieve three-dimensional image restoration on an object passing through the beam array, and then analytical processing is performed on the image so as to realize vehicle separation and obtain axle information. Compared with the traditional vehicle separatorand axle recognition device, the laser scanning vehicle separating device can realize the functions of vehicle separation and axle recognition simultaneously, thereby reducing the number of devices,being easy for field installation and construction, not only reducing the cost, but also increasing the flexibility. In addition, the laser scanning vehicle separating device adopts real-time image scanning, and also greatly improves the detection and measurement accuracy. The non-contact measurement prolongs the service life and is easy in construction, and the laser scanning vehicle separating device is assembled and disassembled conveniently and not restricted by the field environment.

The invention provides an ultrafast microscopic imaging system capable of simultaneously obtaining depth and surface information, which comprises a laser generator, wherein an output end of the laser generator is connected with an input end of a first coupler through a dispersive medium, a first output end of the first coupler is connected with a first end of a circulator, a second end of the circulator is connected with a first end of a collimator, the second end of the collimator is aligned with the first input/output end of a diffraction device, the second input/output end of the diffraction device is aligned with the plane of a plano-convex lens, the convex surface of the plano-convex lens is aligned with a sample to be measured, the third end of the circulator is connected with the first input end of the second coupler, the second output end of the first coupler is connected with the second input end of the second coupler through an adjustable delay medium, the output end of the second coupler is connected with the input end of a detector, the output end of the detector is connected with the input end of a high-speed oscilloscope, and the output end of the high-speed oscilloscope is connected with a signal processing module.

The invention provides a four-line four-eye three-dimensional laser scanner, which comprises a shell, four groups of industrial camera lens modules, four groups of laser modules, an image acquisition control system and an upper computer, wherein a bottom plate is arranged in the shell, the four groups of industrial camera lens modules are uniformly distributed along the edge of the bottom plate at an interval of 90 degrees pairwise, the four groups of laser modules are circumferentially distributed in the middle of the bottom plate at equal intervals, the industrial camera lens modules and the laser modules are in one-to-one correspondence, each industrial camera lens module comprises an industrial camera and a lens, the lens is installed on the industrial camera, each laser module comprises a laser device, the image acquisition control system comprises a controller, the controller is connected with the industrial camera, the controller controls the industrial camera to collect image data scanned by the laser, and the controller is electrically connected with the upper computer. The invention further provides a scanning method of the four-line four-eye three-dimensional laser scanner.

The invention relates to a lane line identification method based on a vehicle-mounted laser radar, and belongs to the field of mode identification of automatic driving. The method comprises the following steps of 1) reading road point cloud data in curb, 2) ordering, 3) filtering a mean value, 4) searching for a peak value, 5) screening height information of lane lines, and 6) screening a peak value by combining different lines. The vehicles lines in front of and behind a vehicle are identified. The problem that the lane lines cannot be identified by a traditional camera in low illumination conditions as the night or foggy days is solved.