322results about How to "Improve scanning accuracy" patented technology

A method and an arrangement are provided for scalable confocal interferometry for distance measurement, for 3-D detection of an object, for OC tomography with an object imaging interferometer and at least one light source. The interferometer has an optical path difference not equal to zero at each optically detected object element. Thus, the maxima of a sinusoidal frequency wavelet, associated with each detected object element, each have a frequency difference Δf_Objekt. At least one spectrally integrally detecting, rastered detector is arranged to record the object. The light source preferably has a frequency comb, and the frequency comb differences Δf_Quelle are changed in a predefined manner over time in a scan during measuring. In the process, the frequency differences Δf_Quelle are made equal to the frequency difference Δf_Objekt or equal to an integer multiple of the frequency differences Δf_Objekt at least once for each object element.

A freehand 3-D imaging system includes an integrated sensor configuration that provides position and orientation of each 2D imaging plane used for 3-D reconstruction without the need for external references. The position sensors communicate with the imaging system using either wired and wireless means. At least one translational and one angular sensor or three translational sensors acquire data utilized to compute position tags associated with 2D ultrasound image scan frames. The sensors can be built into the ultrasound transducer or can be reversibly connected and therefore retrofitted to existing imaging probes for freehand 3D imaging.

The invention relates to a method for fabricating a navigation templet used in pedicle positioning, including the following steps: firstly, collecting the original data and building up a three-dimensional vertebra model; wherein focusing on the location of a pedicle (1); then, conducting three-dimensional analysis to a screw entry passage of the pedicle and building up a virtual screw entry templet(3) which includes the screw entry passage(2); wherein the screw entry templet(3) is a reverse navigation templet which matches with the outline of the rear part of a vertebral lamina; and then, fabricating the reverse navigation templet through quick molding technique. The increases of CT or MRI scanning velocity and precision provide a precise sectional image for acquiring a three-dimensional model in reverse engineering, and the necessary organs can be quickly reconstructed through a three-dimensional reconstruction software and can be transformed and bored freely on the virtual model so as to figure out an optimal pedicle screw entry route. On the basis of the virtual model, the pedicle screw entry direction and depth can be guided by using the reverse navigation templet fabricated through quick molding technique during an operation so as to quickly and accurately finish the operation.

A scanning system for confocal scanning of an object, comprising a light source (1), imaging optics (4) for focusing the light (5) radiated from the light source (1) onto the object (6) to be scanned, and further comprising an image detector (10) for detecting the light (7) from an object point (6′) backscattered from the object (6) and passing through the same imaging optics (4). Means (11) for varying the length of the optical path are disposed in the optical path between the aperture array (3) and the object (6), by which means the optical distance of the image plane can be modified in a specific manner, and means are provided to influence the light (5) radiated by the light source onto the object (6) and / or the light (7) reflected from the object (6) and impinging on the sensor (10), in at least one of its characteristics, during an exposure period (tB1) for acquiring an image, and, during said exposure period (tB1), a profile holds which states a specific relationship between the characteristic of the light (5, 7) and the optical distance of the image plane from the imaging optics (4), and means (10) are provided which provide a measured value dependent on the characteristics of the light of the trajectory of observation (7) over the exposure period (tB1), a height coordinate (Zs) of the object (6) being reconstructable from the measured value achieved during said exposure period (tB1) and a reference value.

The invention relates to a computer binocular vision denture scanning device and a three-dimensional reconstruction method thereof. The device comprises a linearly structured light vision collection part, a rotary measuring bed, a control part of the rotary measuring bed, and a box, wherein two high resolution digital charge coupled device (CCD) cameras are positioned on the central sides above the rotary measuring bed and the control part of the rotary measuring bed and symmetrically distributed by taking the linearly structured light laser as the centre in the linearly structured light vision collection part; first and second accessories in the rotary measuring bed and the control part of the rotary measuring part are arranged on the rotary measuring bed; the rotary measuring bed is driven by a driving mechanism to rotate; and the structures are arranged in the box. The method comprises: placing a denture on the rotary measuring bed; allowing the linearly structured light laser to project laser on the denture; driving the rotary measuring bed to rotate continuously by the driving mechanism; and taking pictures by two CCD cameras and transmitting the pictures to an external control computer to process the pictures to obtain three-dimensional data on the denture surface. In the invention, the mechanical structure and the control method need no various speed control, have no requirement on precision of spindle rotation of a motor, and are convenient to operate and high in scanning precision.

The invention discloses a navigation template capable of being used for positioning vertebral pedicle. A manufacture method of the navigation template comprises the following steps of: firstly, acquiring original data and establishing a three-dimensional vertebra model on a computer; secondly, carrying out three-dimensional analysis on a vertebral pedicle needle-entering channel, extracting an outline of the rear part of a vertebral plate, establishing a virtual reverse template coincide to the outline at the rear part of the vertebral plate in a system; thirdly, fitting the virtual reverse template with the vertebral pedicle needle-entering channel, establishing a virtual needle-entering template; and fourthly, manufacturing the needle-entering template by using a quick forming technology, wherein the needle-entering template is a reverse navigation template coincide to the outline of the rear part of the vertebral plate. The invention organically integrates a digital technology, reverse engineering and the quick forming technology, thereby achieving the purpose of rapidly, cheaply and efficiently accurately positioning the vertebral pedicle.

The invention discloses a robot three-dimensional scanning device and a robot three-dimensional scanning method. The device comprises an MEMS scanning galvanometer laser three-dimensional probe for generating three-dimensional point cloud data, a six-axis machine arm for clamping the MEMS scanning galvanometer laser three-dimensional probe, a turntable for placing a measured object and a controller for controlling the robot and the turntable, wherein the MEMS scanning galvanometer laser three-dimensional probe is arranged at the tail end of the machine arm; and the measured object is placed in the center of the turntable. In comparison with a digital and physical grating technology, the robot three-dimensional scanning device has the advantages of large depth of field, fast scanning speed, small size and high scanning accuracy; the device combines the high-accuracy turntable and the six-degree-of-freedom robot to a seven-degree-of-freedom device, the working range of the machine arm can be increased, flexibility of scanning on a large object can be improved, scanning dead angles can be reduced, and finally, fully-automatic three-dimensional scanning can be realized.

The invention discloses an array type parallel laser projection three-dimensional scanning method. The array type parallel laser projection three-dimensional scanning method comprises steps that a laser micro-vibration mirror projection device used for projecting line lasers in different directions and a plurality of array type cameras used for data acquisition are provided; laser cutter separation of each acquired image in different directions is carried out, and the laser cutter centers of the laser cutters in various directions are respectively extracted, and according to a triangle relation among the projection device and the cameras, an object surface three-dimensional coordinate of a line laser position is acquired; the projection device is used to move the line laser on the object surface by one pixel each time, and the above mentioned process of extracting the object three-dimensional coordinate on the laser cutter position is repeated until the three-dimensional coordinate of the whole object surface is acquired by the laser cutter. The laser projection device adopts MEMS scanning vibration mirror laser, and compared with a digital light and physical grating technology, field depth is large, scanning speed is fast, a size is small, and scanning precision is high; and at the same time, the system is used to distribute the cameras in an array, and then the sensitivity to complicated step edge measurement is provided, and then the non-contact, high-speed, and object edge step high precision measurement of the object is realized.

A system, method and computer program product are provided for scanning application program data utilizing a mobile communication device. Included is an application program installed on a mobile communication device capable of communicating via a wireless network. Such application program is adapted for performing tasks utilizing the mobile communication device. Associated therewith is a scanning subsystem in communication with the application program for scanning application data relating to the tasks performed by the application program. In use, the application program communicates information relating to the application data to the scanning subsystem to facilitate the scanning by the scanning subsystem.

A portable reading machine has a scanner for scanning an image comprising text. The scanner has a scanning area occupying a maximum width and an active width defined by a scanning width limiting mechanism adjustable to a preselected width. A photoreceptive element forms an electronic representation of a portion of the image within the active width. The electronic representation is converted to a digital character string corresponding to the active image text. A speech system outputs the digital character string as ordinary spoken language voiced through a speaker or headset.

A scanning system for confocal scanning of an object, comprising a light source (1), imaging optics (4) for focusing the light (5) radiated from the light source (1) onto the object (6) to be scanned, and further comprising an image detector (10) for detecting the light (7) from an object point (6′) backscattered from the object (6) and passing through the same imaging optics (4). Means (11) for varying the length of the optical path are disposed in the optical path between the aperture array (3) and the object (6), by which means the optical distance of the image plane can be modified in a specific manner, and means are provided to influence the light (5) radiated by the light source onto the object (6) and / or the light (7) reflected from the object (6) and impinging on the sensor (10), in at least one of its characteristics, during an exposure period (tB1) for acquiring an image, and, during said exposure period (tB1), a profile holds which states a specific relationship between the characteristic of the light (5, 7) and the optical distance of the image plane from the imaging optics (4), and means (10) are provided which provide a measured value dependent on the characteristics of the light of the trajectory of observation (7) over the exposure period (tB1), a height coordinate (Zs) of the object (6) being reconstructable from the measured value achieved during said exposure period (tB1) and a reference value.

The invention discloses an automatic measuring system for insulating material surface charge two-dimensional distribution. The automatic measuring system comprises a sealed cavity which is internally provided with a two-dimensional electronic control displacement platform. A product to be measured is fixed to the two-dimensional electronic control displacement platform through a vertical backboard electrode, and the upper end and the lower end of the product to be measured are connected with a high-voltage electrode and a grounding electrode respectively. The movement end of a one-dimensional magnetic coupling linearly-rotating driver is provided with an insulating clamp. A Kelvin probe is fixed to the insulating clamp, the probe point of the Kelvin probe is perpendicular to the product to be measured, an output signal lead of the Kelvin probe is connected with an electrostatic potentiometer outside the sealed cavity, the signal output end of the electrostatic potentiometer is connected with a data collecting system of a computer, the other side of the sealed cavity is provided with a connecting pipe, and the tail end of the connecting pipe is provided with a vacuum pump. The insulating material surface charge two-dimensional distribution automatic measuring system is used for measuring surface charge density two-dimensional distribution of an insulating material, and the flashover characteristic study content and the charge distribution measuring means of the insulating material are enriched.

A method for making multilaser radar be operated coordinately includes enabling each radar to finalize object blocking scan and dynamic weighted treatment of scanning data independently under coordination control of master controlling and processing module (MCPM), carrying out effectiveness verification on data collected by each radar in real time and stopping linear grogram of the radar as well as shielding its function if certain radar is fault, feeding radar state back to system sate display module, carrying out dynamic data treatment of error compensation and coordinate matching adaptively and finalizing scan and identification task of object multiple surfaces by MCPM according to system topological structure.

The invention relates to a cylindrical target for a three-dimensional laser scanning system, comprising a target main body, a base and a connecting column which are in an integral structure. The target main body is in a cylinder shape, and the cylindrical outer surface is coated with reflectorized paint or reflective paper to form a cylindrical reflective surface. The seat is a cylinder which has the same axis with the target main body, one end is connected with the target main body through the connecting column, and the center of the other end is provided with a thread hole and then can be connected with a tripod. Thus, a laser scanner can scan the cylindrical target from different station points, and is equivalent to scan against the cylindrical reflective surface. By scanning the cylindrical target through the laser scanner from different station points, the simulated positions of the center axis of the cylindrical target is the same. When the invention is sued for carrying out the registration operation of three-dimensional laser scanning, the target distribution is convenient, the field operation time is shortened, and the registration precision is high.

The invention relates to a continuous video image processing scanner and scanning method for paper documents. The scanner comprises an operation platform, a video camera and a processor. A liner with a specific color and identification is laid on the surface of the operation platform. The video camera is connected with the processor. Paper documents are placed at specific positions of the operation platform liner; the video camera is mounted above the operation platform, a camera lens is downward to shoot the operation platform scene, and the video camera outputs shot video to the processor; and the processor processes video images continuously, outputs digital documents and is connected with a displayer to display processing results on the displayer. By means of the continuous video image processing scanner and scanning method for paper documents, paper documents, particularly bound paper documents, are subjected to digital scanning efficiently and accurately, and paper documents are rapidly converted to digital information resources facilitating web utilization and sharing.

The invention discloses a region-based laser radar variable-density scanning system and method. According to the system and method, the three-dimensional fusion data of the image data of a video camera, the point cloud data of a laser radar or the image data and the point cloud data are analyzed, so that a critical region is obtained, the scanning region of the laser radar and the scanning densityof the laser radar are controlled according to the critical region, and control signals are sent to a laser transmitter; and the laser transmitter, based on the control signals sent by a laser scanning controller, transmits laser beams to perform laser scanning on the scanning region corresponding to the critical region with a first scanning density and transmits laser beams to perform laser scanning on scanning regions corresponding to regions other than the critical region with a second scanning density. Therefore, the effective data amount of the laser radar is improved, the scanning precision of the critical region is improved, invalid data amount is reduced, and the effective resolution of the laser radar can be increased.

The invention discloses a confocal transverse scanning device and a confocal transverse scanning method based on a reflection type liquid crystal spatial light modulator, belongs to the technical field of optical precision measurement, and in particular relates to a confocal microscope and a scanning method thereof. The reflection type liquid crystal spatial light modulator is adopted to take the place of a transverse scanning mechanism in a conventional confocal transverse scanning device; and by changing the phase driving spectrum loaded by the reflection type liquid crystal spatial light modulator, the two-dimensional deviation of a light beam is realized, and the non-mechanical transverse scanning is realized. Due to such design, the microscope and a tested object both do not need to be transversely moved, but the transverse light beam scanning on the tested object is realized; not only is the precise and complex control on a three-dimensional micro-displacement platform avoided, but also the scanning precision and the repetitiveness are improved; and particularly, the effect is more remarkable for easily-deformed samples, so that the types of measured samples are widened.

The invention discloses a remote three-dimensional scanning system and method based on machine vision. The system comprises two parts, namely a hardware equipment part and a software system part. The hardware equipment includes image acquisition equipment, an optical filter, a light source, camera calibrating equipment, etc. In order to solve the problem of rapidly acquiring an object three-dimensional point cloud under a natural environment, the invention designs a set of three-dimensional scanning hardware equipment and further has a matching software system developed. Furthermore, by referring to an image acquisition method, a camera focal length calibrating method, a system calibrating method, an image processing method and a three-dimensional point cloud acquisition method, the system can rapidly achieve three-dimensional scanning on objects and further realize robustness of equipment on ambient light and also keep the three-dimensional point cloud calculation precision. Compared with the prior art, the system which is not limited by ambient light conditions during a three-dimensional point cloud acquiring process achieves a relatively high scanning speed and relatively high scanning precision. The system characterized by simple equipment structure and low cost is not limited by time and place when in use.

The invention discloses a multi-ocular stereoscopic vision three-dimensional scanning method and system. The method comprises the steps that S1: light band image groups are acquired by at least threegroups of vision components arranged around an object to be scanned and positioned at the same horizontal height, and each light band image group includes a left light band image and a right light band image; S2: the light band center of the left light band image and the right light band image is extracted; S3: the light band center is converted to the intra-group three-dimensional coordinate data; S4: joint calibration is performed and all the intra-group three-dimensional coordinate data are converted to the same coordinate system so as to obtain the world coordinate system data; and S5: point cloud integration is performed through combination of the world coordinate system data of all the horizontal weight so as to obtain the three-dimensional point cloud data of the object to be scanned. According to the multi-ocular stereoscopic vision three-dimensional scanning method and system, omnibearing transverse scanning is performed on the surface of the object to be scanned from different perspectives by at least three groups of vision components so that the blind area problem of scanning can be effectively solved, and the scanning efficiency and the scanning accuracy of the system can be enhanced.

The invention belongs to the technical field of analysis equipment and discloses an online solid waste incineration treatment analysis system. Gases such as NO, NO2, CO, CO2, HCL, SO2 and O2 in exhausted flue gas are measured after refuse combustion. According to the online monitoring system, solid waste incineration flue gas is subjected to sampling analysis along a sampling probe, an electric heating type heat tracing sampling pipe, a sampling pump, a pretreatment unit and a Fourier transform infrared spectroscopy (FTIR) analyzer sequentially. In order to guarantee reliable and stable operation of the system, the monitoring system also comprises an analyzer purging protection unit, a probe blowback unit and a calibration unit. In the gas analysis process, the temperature is high in the whole process, the component loss is low, the measurement accuracy is high, and the system equipment can be prevented from being subjected to condensate corrosion by acid gases under unforeseen circumstances due to the protection unit. Moreover, the FTIR Fourier external analyzer has extremely high expansion capability, and analysis components can be increased according to the requirement.

A photo-curing 3D (three dimensional) printer based on helical scanning and a flexible interface comprises a stepper motor in the middle of the bottom of the printer, the output of the stepper motor is connected with an electric slip ring, a linear feed movement platform is arranged on the electrical slip ring, an integrated LED (light-emitting diode) camera lens is connected to the linear feed movement platform, a film supporting glass holder is arranged outside the integrated LED (light-emitting diode) camera lens, the integrated LED (light-emitting diode) camera lens supports film supporting glass, the film supporting glass is contacted directly with a nonstick film thereon, the nonstick film is fixed on the integrated LED camera lens by a resin groove and a resin groove film fixing cover, the nonstick film supports photosensitive resin, a solidified resin layer is attached onto a lifting head, the lifting head is connected with a lifting system, the LED camera lens is driven to perform Archimedes helical path scanning on the surface of the resin by use of planar helical motion combining rotary motion with linear motion, so that the oscillation can be effectively avoided, the scanning speed and accuracy are improved, the tearing process is more efficient and economic, and the work efficiency of the printer is improved.

The present invention provides a three-dimensional laser scanning apparatus for a cable tunnel and a mobile positioning method thereof. The three-dimensional laser scanning apparatus for a cable tunnel comprises a laser scanning positioning apparatus, a cable tunnel intelligent robot, a hand-held terminal, and several ultra wide band positioning base stations. The laser scanning positioning apparatus is installed on the cable tunnel intelligent robot, and moves as the cable tunnel intelligent robot moves. The laser scanning positioning apparatus is used for performing three-dimensional scanning on the cable tunnel, performing scanning processing to obtain mobile collection point cloud data of scanned data, and performing positioning on the laser scanning positioning apparatus. The hand-held terminal is connected to the laser scanning positioning apparatus through a network, and is used for processing real-time point cloud data in a movement process of the laser scanning positioning apparatus, receiving coordinate data sent by a server, and displaying positioning data. The ultra wide band positioning base station is fixedly installed inside the cable tunnel, and the ultra wide bandpositioning base station is used for receiving a signal of the laser scanning positioning apparatus, and transmitting the received signal to the server.

The invention provides a portable three-dimensional visual photoacoustic imaging system, which comprises a central processing unit, a driving circuit, a data acquisition circuit, a signal amplification circuit, a signal pre-processing circuit, an ultrasonic sensor, an external circuit interface, laser diodes, a collimating lens group, a beam expanding lens group, a focusing lens group, an X-axis reflecting galvanometer, a Y-axis reflecting galvanometer, a field lens, a linear motor, an X-axis motor, a Y-axis motor and a shell. Fast and efficient three-axis scanning galvanometer technology is applied to the field of photoacoustic stimulation. The portable three-dimensional visual photoacoustic imaging system is integrated with the laser diodes, so that portable three-dimensional visual photoacoustic imaging can be realized. Besides, the portable three-dimensional visual photoacoustic imaging system can be widely applied to the field of material detection, industrial flaw detection, medical imaging and the like of complex structures such as square structures, tubular structure, film type structures and the like.

A double side image scanner includes a case having a medium guide track with a reference loading line, a main frame mounted inside the case, a first roll feed including a first feed roller mounted on a front side of the guide track and a first idle roller disposed above the first feed roller for cooperating with the first feed roller to load the medium, a second roll feed including a second feed roller mounted on a rear side of the guide track and a second idle roller disposed above the second feed roller for cooperating with the second feed roller to load the medium, a drive device for rotating the first feed roller and the second feed roller, first and second image sensors for scanning opposite surfaces of the medium to acquire image data, and a tracking device for biasing the medium toward the reference loading line.

A method for positioning a print integrity image capture device comprises the steps of creating electronic document data; adding print integrity markings to the electronic document data; sending the electronic document data to a raster image processor; determining the location of integrity markings for a tangible print of electronic document data; automatically adjusting an image capture device location based on integrity marking location information; providing necessary scheduling information to a feeding device and / or a sorting device; printing a tangible print of electronic document data; scanning a tangible print of electronic document data based on a determined image capture location; analyzing an image to determine which integrity marking is located on the tangible print of electronic document data; relaying an integrity marking number to a production management algorithm; determining whether all tangible prints of electronic document data have been printed; and determining whether all documents have been printed.

The invention discloses a method and device for proton tomography. The method includes the steps that firstly, proton beams are emitted through a treatment head, then the proton beams are modulated, matched and shaped, so that the preset position of an object is irradiated with the proton beams, 1:1 imaging of the proton beams is achieved through a magnetic lens set, and finally images are collected in real time through scintillating medium crystals and a CCD camera. The method and device solve the technical problems that an existing method for proton tomography is not accurate in scanning, errors exist and the spatial resolution is poor. The method for proton tomography has the technical advantages that scanning is accurate, scanning accuracy is high, the number of errors is small, and the spatial resolution is high.

The invention provides a pre-scanning method of a reagent card as well as a pre-scanning system and a pre-scanning terminal for the reagent card. The method comprises the following steps: S1, receiving a pre-scanning command; S2, continuously detecting whether the reagent card is inserted or not; if so, controlling a shooting device to shoot an image of the reagent card, and then executing S3; ifnot, continuing the detection; S3, identifying the preset marked area of the shot image, comparing the obtained identification information with the preset information, and judging whether detection items of the reagent card are all correct or not according to the comparison information; if so, identifying image information of a detection area of the reagent card and completing the detection; if not, indicating card insertion error or returning the card. The method can determine whether the card insertion direction and detection items of the reagent card are correct or not according to the shotimage of the reagent card; even if the reagent card is inserted in the wrong direction, the scanning detection can still be completed quickly; the problem that the detection items and the applicationitems are inconsistent with each other can be avoided; furthermore, the waste of the reagent card and a detection sample can be avoided.

The invention provides a rotary three-dimensional foot shape and plantar pressure scanner and a working method thereof. The scanner comprises a vertical control platform, a foot shape scanning column,a circular-ring guide rail, a motor, a pressure measuring board, a measurement control board card, an interaction and processing terminal, a protection pad, a network interface, a USB interface, a switch button and an external power cable. The foot shape scanning column is installed at the outer side of the platform base of the vertical control platform and is fixedly connected with the circular-ring guide rail by a screw. The foot shape scanning column is driven by the motor to make constant-speed circular rotation with the circular-ring guide rail. When the column rotates, an upper 3D real-sensing camera module and a lower 3D real-sensing camera module work cooperatively to obtain three-dimensional image data of feet of the user. The pressure measuring board installed in the center of the platform base is used for acquiring plantar pressure distribution data of the user synchronously; the measurement control board card is responsible for controlling the foot shape scanning column and the pressure measuring board to collect data and transmit the collected data to the interaction and processing terminal. Therefore, the foot morphological and sport dynamics parameters of the user can be obtained synchronously, conveniently and quickly and the analysis is fused; complementary scanning is realized; and self-calibration can be carried out.

The invention belongs to the field of optical fiber sensing and optical measured, in particular to a wide-range optical delay device. The wide-range optical delay device consists of a step type optical path multiplication device and a continuous optical path scanning device which are connected through a transmission optical fiber; wherein, the range of optical path continuous scanning of the continuous optical path scanning device is 0 to X0; the step type optical path multiplication device (110) is composed of n different delay light paths a0, a1 ...... an of fixed length, the optical path of delay light path is respectively L0, L1 ......, Ln (L0=0, n=0,1,2,......,), the optical path of adjacent delay light paths increases to meet Ln+1-Ln<X0, X0-d<Ln+1-Ln<X0, and Ln+2-Ln+1<=Ln+1-Ln, according to the invention, a fixed delay module and a variable optical path delay mechanism are combined together to achieve a continuous expansion of arbitrary optical path; the device realizes a seamless connection of the optical path by means of high-precision scanning platform to meet the continuous scanning function in the same precision.

An item storage and tracking unit for holding a plurality of discrete items may include a housing including a plurality of receptacles positioned therein and defining a plurality of associated inner areas. A signal emitting device is associated with at least one item and configured to emit a signal. At least one movement sensor and / or at least one weight sensor may be associated with each receptacle of the plurality of receptacles. At least one signal receiving arrangement is associated with each receptacle and configured to scan at least a portion of the inner area of the associated receptacle for the signal emitted from the signal emitting device associated with the at least one item. The scan is initiated at least partly in response to a determination by the at least one movement sensor, the at least one weight sensor, and / or an antenna associated with the associated receptacle.