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81results about How to "Does not affect positioning accuracy" patented technology

Annular thin-wall article clamping device and using method thereof

The invention provides an annular thin-wall article clamping device and a using method of the device. The clamping device comprises an annular chassis; the chassis is provided with a radial regulation mechanism of a locating workpiece; the radial regulation mechanism is divided into an inner radial regulation mechanism and an outer radial mechanism; two radial regulation mechanisms position workpiece respectively from the inner side or the outer side of the workpiece; the chassis is respectively provided with track-directed sliding grooves for the two radial adjustment mechanisms; the inner end of the sliding groove of the inner radial regulation mechanism is provided with a stopping block; the outer end of the sliding groove of the outer radial regulation mechanism is provided with the stopping block; the sliding grooves of the two groups of radial regulation mechanisms are disposed at intervals; one of the two groups of radial regulation mechanisms is provided with an axial compacting mechanism for fixing the workpiece; and the axial compacting mechanism is displaced alternatively between the two groups of radial regulation mechanisms when turning the workpiece. The clamping device can realize the processing of two side walls of the workpiece by clamping the workpiece once, and is fit for the clamping of the workpieces with different specifications. The device has the characteristics of high use rate, strong practical applicability, good generality, time saving and labor saving, light labor intensity, high production efficiency and the like.
Owner:DONGFANG TURBINE CO LTD

Near-drowning behavior detection method fusing UWB indoor location with video target detection and tracking technology

Devices related to a near-drowning behavior detection method fusing UWB indoor location with a video target detection and tracking technology comprise a smart bracelet module, an intelligent monitoring information processing module, a communication module and a display alarm module, the smart bracelet module is used for performing indoor location, the intelligent monitoring information processingmodule is used for processing video data acquired by an intelligent monitoring camera, location information of a smart bracelet and water depth information; and the communication module is used for realizing information transfer among the smart bracelet module, the intelligent monitoring information processing module and the display alarm module. Specific detection steps of the near-drowning behavior detection method are performed according to the following way: performing system initialization; and building a relationship among an image of the intelligent monitoring camera, location of the smart bracelet module and a swimming pool coordinate system, then setting near-drowning conditions, and performing near-drowning determination by virtue of a near-drowning detection algorithm. The near-drowning behavior detection method is simple in main body structure, smart in design concept, good in using effect, high in detection accuracy, low in maintenance cost, friendly in application environment and broad in market prospect.
Owner:青岛联合创智科技有限公司

Fixture for three-coordinate measuring machine of blade and method for establishing measuring coordinate system

The invention provides a fixture for a three-coordinate measuring machine of a blade and a method for establishing a measuring coordinate system. An upper surface of a fixture body is provided with a V-shaped tongue-and-groove, and a wedge-shaped surface of the V-shaped tongue-and-groove is completely coincided with a wedge-shaped surface of a blade tongue root. The V-shaped tongue-and-groove is positioned on a central line of a width of the fixture body. A set screw is positioned on a symmetric centre of a length and the width of the fixture body. When the measuring coordinate system of the fixture for the three-coordinate measuring machine of the blade is established, a coordinate plane is established through three points, a coordinate axis is established through projections of a connecting line of the two points on the coordinate plane and a coordinate origin point is determined by one point, and thereby the measuring coordinate system of the blade is fast and accurately established; moreover, the measuring coordinate system can be fast converted from the blade tongue root to the fixture body by using the rectangular fixture body so as to reduce time and difficulty of establishing the measuring coordinate system in the blade measuring process. The fixture of the invention has the advantages of simple structure, convenience for mounting and high locating precision, can be detached for multiple times without affecting the locating precision, can realize batch measurement of the blades and increases the blade measuring efficiency.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Sliding-type tool special for positioning clamp screw hole

The invention discloses a sliding-type tool special for positioning a clamp screw hole. The tool comprises a framework, wherein the framework is a square frame which is formed by connecting two transverse staff gauges and two longitudinal staff gauges; the surfaces of both of the longitudinal staff gauges and the transverse staff gauges are provided with scale marks; a transverse sliding chute is reserved inside both of the transverse staff gauges; a vertical sliding chute is reserved inside both of the longitudinal staff gauges; a transverse caliper is arranged between the two transverse staff gauges; a second through slot is reserved on the transverse caliper; a transverse sliding block is respectively arranged at the two ends of the transverse caliper; a transverse guide block is respectively arranged on the two transverse sliding blocks; the two transverse guide blocks are respectively matched with the two transverse sliding chutes; a vertical caliper is arranged between the two longitudinal vertical staff gauges; a first through slot is reserved on the vertical caliper; a vertical sliding block is respectively arranged at the two ends of the vertical caliper; a vertical guide block is arranged on each vertical sliding block; the two vertical guide blocks are respectively matched with the two vertical sliding chutes; and both the vertical sliding blocks and the transverse sliding blocks are provided with scale mark pointers.
Owner:STATE GRID SHANDONG ELECTRIC POWER +1

Indoor positioning method of path attenuation coefficient based database construction

The invention discloses an indoor positioning method of path attenuation coefficient based database construction. The method is divided into a training stage and a positioning stage; the training stage is mainly to obtain a corresponding attenuation coefficient of each reference node in the environment and an average attenuation coefficient of signal propagation in the environment by utilizing the known received signal strength and distance information; the positioning stage is mainly to obtain a distance between a blind node and the corresponding reference node and a distance between the blind nodes by utilizing the corresponding attenuation coefficients of the reference nodes in the environment which are obtained in the training stage, thereby obtaining a relative coordinate position of each blind node. The indoor positioning method is high in positioning precision, simple in implementation, low in system power consumption and low in cost.
Owner:北京停碳科技有限公司

Geographical coordinate positioning system and method based on 3D point cloud aerial photographing images

The invention discloses a geographical coordinate positioning system and method based on 3D point cloud aerial photographing images. The system comprises a 3D point cloud establishment module, a homography module and a conversion module. Correspondingly, the method comprises the following steps: firstly, performing three-dimensional digitization on an image sequence according to an SFM method, rapidly acquiring 3D sparse point cloud in a world coordinate system, and establishing a homography H for representing the relationship of a geographical coordinate and a pixel coordinate of characteristic points in the 3D point cloud; respectively processing two different positioning requirements. According to the method, 3D point cloud with high precision is introduced into positioning of 2D images, so that positioning difficulties caused by non-normal incidence of the 2D images are substantially solved; when the relationship of the geographical coordinate and the pixel coordinate is established, positioning precision is ensured to the maximum extent in such a mode that reference points are searched within a minimum range; therefore, the method is high in positioning precision, and has great significances for modules of range constraint, target positioning, geographical marking and the like in aerial photographing patrol items.
Owner:西安因诺航空科技有限公司

Indoor personnel positioning system and method based on infrared human body sensor array

The invention provides an indoor personnel positioning system and method based on an infrared human body sensor array. The system comprises a plurality of detecting nodes, a base station node, and a host computer. The detecting nodes are arranged at different positions indoors. The base station node is connected with the host computer through a serial port connecting line. The detecting nodes are wirelessly connected with the base station node. Each infrared human body sensor array comprises four infrared human body sensors. Each infrared human body sensor has a 90-degree detecting range such that each infrared human body sensor array may achieve 360-degree omnibearing detection. Each detecting node transmits a detected result to the base station node via a Zigbee network in order to compute personnel positions. Personnel to be positioned are not required to wear any tag or signal source and are completely passively positioned. The indoor personnel positioning system is high in positioning precision. Since each infrared human body sensor has an about 6-meter detecting radius, the information of more than 3 detecting node may achieve about 1-meter positioning precision which may completely satisfy an indoor personnel positioning requirement.
Owner:NORTHEASTERN UNIV

Directional Wi-Fi (Wireless Fidelity)-based wireless positioning system and method

InactiveCN102802259AAvoid Upfront Data Collection EffortsMeet immediacy needsWireless communicationWi-FiDirectional antenna
The invention provides a directional Wi-Fi (Wireless Fidelity)-based positioning system. Two Wi-Fi APs (Access Points) with rotary directional antennas are placed at the two sides of a positioning area to be used for transmitting wireless signals; a client is moved in the positioning area, simultaneously receives the wireless signals from each directional AP, and supplies the data related to the signals to a calculating device; and the calculating device analyzes and processes the data so as to calculate the position of the client and return the position information to the client, thereby positioning and tracking the client in real time. The system can be arranged on the site at any time and any place without construction on the site or in a room in advance. Moreover, large-scale preliminary data acquisition works are avoided, and the instant requirements in emergency occasions are met.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI

Marker positioning method and system of calibration plate image

The present invention discloses a marker positioning method and system of a calibration plate image. The method includes the following steps that: image pyramid layering is performed on the calibration plate image; binarization is performed from a topmost layer of image, a calibration plate area and a marker contour are searched in the binary image, if no calibration plate areas and marker contours are found out, the calibration plate area and the marker contour are further searched in a next layer of image until search is performed in the last layer or the calibration plate area and the marker contour are found out; and the bounding rectangle of the marker contour in the calibration plate area is calculated in the pyramid image of the searched calibration plate area, the bounding rectangle is mapped into the calibration plate image, so that a region of interest containing a marker is obtained, and the center coordinates of the marker are calculated. Therefore, contour search is performed from the top-layer low-resolution image, so that the calibration plate area and the marker contour can be found out, and the region of interest containing the marker can be positioned quickly and accurately, and positioning efficiency is improved.
Owner:SHENZHEN HUAHAN WEIYE TECH

Camera shooting type multi-target locating method and device based on image rectification

The invention relates to a camera shooting type multi-target locating method and device based on image rectification and belongs to multi-target locating methods and devices. The camera shooting type multi-target locating device comprises a locating platform, a control circuit board and a master controller. Cameras obtain target information on the surfaces of screens, the primary optical axis of each camera is automatically determined according to the imaging starting position of the camera, and then the imaging positions of targets in the cameras are extracted. The imaging positions are corrected through the distortion correction method based on equivalent faces. The cameras are grouped, and multi-target locating is achieved through the optical intersection measuring locating algorithm. The camera shooting type multi-target locating method and device based on image rectification has the advantages that the structure of the device is simple, reliability is high, lens distortion does not need complicated calibration and correction, extension is easy, and the locating precision is high.
Owner:JILIN UNIV

Downward trendline bunching SAR radar positioning method based on imaging matching

The invention discloses a downward trendline bunching SAR radar positioning method based on imaging matching. The method includes the steps: taking a ground point target as an original point, establishing a geometrical configuration of missile location in an East-North-Up coordinate system on the basis of a downward trendline of SAR radar, and sequentially obtaining an SAR imaging plane image of the ground point target on an imaging plane and the actual position A of SAR radar; obtaining an SAR imaging matched image by means of a geometrical distortion correction mapping function between the imaging plane and a ground plane; obtaining P matching points through an image matching algorithm, and obtaining an affine transformation matrix between the SAR imaging matched image and a set SAR imaging reference image according to the P matching points; constructing an Euler tetrahedron by means of the affine transformation matrix; and according to the set sampling frequency and distance unit numbers of the SAR radar, obtaining the distance between the SAR radar and the ground point target T, the distance between the SAR radar and a set reference point C and the distance between the SAR radar and the p matching point Pp, and calculating the coordinate value of the actual position A of the SAR radar.
Owner:XIDIAN UNIV

Mobile object encoding and decoding device, and railway bogie positioning device and method

The invention relates to a mobile object encoding and decoding device and railway bogie positioning device and method. The mobile object encoding and decoding device comprises an encoding plate and two travel switches used for transmitting pulse signals, wherein the encoding plate is arranged on an object, and the two travel switches are arranged on the other object moving relative to the former object. A row of encoding positions and a row of code reading positions are parallelly arranged on the encoding plate along the relative moving direction and correspond to each other one by one. Encoding sensing blocks are arranged on the corresponding encoding positions according to the encoding way. Code reading blocks are arranged on the code reading positions correspondingly. The two travel switches, the encoding positions and the code reading positions of the encoding plate are arranged in parallel, wherein one of the travel switches is used for detecting the encoding sensing blocks, and the other travel switch is used for detecting the code reading sensing blocks. The mobile object encoding and decoding device is applied to the field of positioning of railway bogies, so that positioning is more accurate, and the problems about low positioning accuracy, complicated structure and high cost of an existing mobile object positioning device are solved.
Owner:HENAN UNIV OF SCI & TECH

Positioning and checking tool for side vertical control over optical prisms and processing method

The invention discloses a positioning and checking tool for side vertical control over optical prisms and a processing method, and belongs to the technical field of optical prism processing. The positioning tool comprises a base plate, positioning triangular prisms, an end surface positioning block and a side surface positioning block; the two positioning triangular prisms are oppositely arrangedon the base plate and form a V-shaped positioning groove; the end surface positioning block is arranged on the position, on one sides of the positioning triangular prisms, of the base plate and is provided with an end positioning surface; the end positioning surface is perpendicular to the upper surface of the base plate and is perpendicular to the projection plane, on the base plate, of the groove surface of the V-shaped positioning groove; the side positioning block is arranged above the V-shaped positioning groove and is provided with a side positioning surface; and the side positioning surface is perpendicular to the groove surface of the v-shaped positioning groove and the end positioning surface of the end surface positioning block. The processing method comprises the following stepsof firstly, assembling the positioning tool through a checking tool; then carrying out vertical positioning on a square prism by using the positioning tool; and finally, grinding the bevels at the two ends of the square prism. According to the positioning and checking tool and the processing method, the square prism can be conveniently and quickly positioned, and the side vertical precision of the bevels at the two ends can be guaranteed to be within 20 arc seconds.
Owner:马鞍山市江南光学有限公司

Method and device for determining feature points during synchronous positioning and map construction

The embodiment of the invention provides a method and a device for determining feature points during synchronous positioning and map construction. The method comprises the steps of acquiring the imageinformation by image acquisition equipment; based on the acquired image information, acquiring a set of first feature points in the image information; analyzing non-static feature points in the set of first feature points, wherein the non-static feature points are feature points corresponding to a moving object; filtering the non-static feature points out of the set of first feature points to generate a set of second feature points. Based on the method and the device, non-static feature points can be simply and conveniently removed, so that the accuracy and the speed of map construction are improved.
Owner:LENOVO (BEIJING) CO LTD

Wireless communication networking and positioning method special for constructional engineering construction site

The invention relates to a wireless communication networking and positioning method for a constructional engineering construction site, and belongs to the technical field of indoor and outdoor positioning. The method solves the personnel indoor and outdoor positioning application problem in the building construction site, and especially solves the practical problems of how to construct a network in the building construction site, how to switch indoor and outdoor space positioning and how to apply. The method specifically comprises the following steps: (1) networking a positioning system; (2) networking a wireless network; (3) indoor and outdoor personnel positioning: offline positioning and online positioning are included, wherein the offline positioning comprises data acquisition, data filtering, data grouping, positioning model training and positioning model output; and online positioning comprises data acquisition, data filtering, input positioning model operation and positioning coordinate output. According to the invention, a Lora radio frequency RSSI fingerprint training model is established by using a Lora base station and is used for positioning indoor and outdoor spaces; the method is different from other indoor and outdoor hybrid positioning methods, indoor and outdoor positioning can be integrated, and a method of switching between outdoor GNSS positioning and indoorpositioning in a buffer zone is abandoned.
Owner:NORTHEASTERN UNIV

Clamp for measuring milling force for milling and processing blade fixed inclining angle

The invention discloses a clamp for measuring milling force for milling and processing blade fixed inclining angle, and belongs to the technical field of processing of aero-engine blades. The clamp for measuring the milling force for milling and processing the blade fixed inclining angle is arranged on a force measuring table of a dynamometer through bolts, and the dynamometer is arranged on a worktable of a machine tool. When the milling force in the blade processing process is measured, a blade tenon root is fixedly arranged on a clamping and positioning block at the end part of a rotary shaft of the clamp. The rotation form of a chuck is transferred to the rotary shaft of the clamp through a transmission shaft, a blade clamped at one end of the rotary shaft rotates together with the rotary shaft, and the inclining angle between a cutter shaft and the blade is kept consistent. The clamp for measuring the milling force for milling and processing the blade fixed inclining angle is arranged on the force measuring table of the dynamometer through the bolts, the fixed inclining angle is processed by the measuring clamp, and the milling force is measured on the force measuring table of the dynamometer. The clamp has the advantages that the structure is simple, the installation is convenient, the positioning precision is high, and the effect on the positioning precision due to multiple times of detachment is avoided.
Owner:西安三航动力科技有限公司

Z-shaped welding line stirring friction welding process method

The invention belongs to engineering applications of stirring friction welding to the field of aerospace manufacture, and relates to a Z-shaped welding line stirring friction welding process method. The technological process includes the steps of welding process allowance increase, welding, welding process allowance cutoff and the like. Stirring friction welding starting and stopping positions areplaced on welding process allowance, the shortcomings of welding starting and stopping of Z-shaped welding lines by a stirring friction welding technology are overcome, and part production requirements are met. The process method is simple, practical, easy to operate and good in welding accessibility, the economic cost of part machining is not increased, and parts are conveniently clamped by a fixture.
Owner:SHAANXI AIRCRAFT CORPORATION

Method and system for installing vehicle window glass

The invention discloses a method for installing vehicle window glass. The method includes the steps that when it is detected that a vehicle reaches a preset position, the offset of a vehicle body is calculated through a position line laser, and the photographing position is adjusted according to the offset so as to guarantee that the vehicle is located in a photographing range; the color of the vehicle body of the vehicle is detected, and the corresponding exposure value of a three-dimensional laser device is selected according to the color of the vehicle body; and the three-dimensional laserdevice is used for scanning the vehicle according to the exposure value, three-dimensional data of a vehicle window are obtained, and the vehicle window glass is installed according to the three-dimensional data. By the adoption of the method, the vehicle body can be accurately positioned in the vehicle window glass installation process, and the installation accuracy is improved. The invention further discloses a system for automatically installing the vehicle window glass through a robot, a computer readable storage medium and a robot, all of which have the above beneficial effects.
Owner:CHANGSHA CTR ROBOTICS

To-be-detected element locating device for detecting platform

The invention provides a to-be-detected element locating device for a detecting platform and relates to an element locating device. The to-be-detected element locating device is provided with a rotating platform, a rotating base, a shift mechanism, a rough adjustment mechanism, a rectangular magnet, an angle displayer, a fine adjustment mechanism, a fixing block, a non-contact type sensor and a PC. The shift mechanism is provided with a crankshaft, a crankshaft fixing base, an upper shift limiting block, a lower shift limiting block and a handle. The rough adjustment mechanism is provided with a rough adjustment screw rod nut, a rough adjustment screw rod, a rough adjustment screw rod nut base, a rough adjustment rack, a rough adjustment knob and a rough adjustment limiting block. The structure of the fine adjustment mechanism is the same as that of the rough adjustment mechanism. The screw pitch between a fine adjustment screw rod nut and a fine adjustment screw rod is far smaller than the screw pitch between the rough adjustment screw rod nut and the rough adjustment screw rod. The adjustment range of the rough adjustment mechanism is from -5 degrees to 5 degrees, and the adjustment range of the fine adjustment mechanism is from -1 degree to 1 degree. The placing angle of work-pieces can be accurately adjusted, installation is simple, operation is simple, fine adjustment and rough adjustment can be carried out, the locating accuracy can be ensured, the detection precision of the detecting platform is not influenced, and the locating device can be used together with most detecting platforms.
Owner:XIAMEN UNIV

Plate splicing hot-press arrangement for furniture production

The invention relates to the technical field of furniture production and particularly discloses a plate splicing hot-press arrangement for furniture production. The plate splicing hot-press arrangement comprises a base, wherein a first hot-press plate is fixedly connected with the top of the base; assembling grooves are formed in the two sides of the top of the base; and a box body is fixedly connected with the bottom of the cavity of each of the assembling grooves. Through mutual cooperation of the base, the first hot-press plate, the assembling grooves, the box bodies, a damping mechanism, aside plate, an anti-oscillation mechanism, a support beam, a driving mechanism, a second hot-press plate, a quakeproof plate and a second spring, the plate splicing hot-press arrangement realizing the advantages of avoiding shake and being excellent in quakeproof effect and solves the problems that the existing hydraulic device is likely to shake and poor in quakeproof effect; and when a user uses the hot-press arrangement, the hot-press arrangement does not shake, does not cause poor plate splicing quality, avoids vibration, does affect the plate positioning precision, facilitates application of the user, and improves the practicality of the hot-press arrangement.
Owner:湖南易红堂家具制造有限公司

Workpiece clamping mechanism

The invention discloses a workpiece clamping mechanism which comprises a supporting plate, an elastic piece, a supporting barrel and a locating barrel. The upper end of the supporting barrel is open, the lower end of the supporting barrel is closed, the locating barrel and the supporting barrel are arranged coaxially, and the upper end and the lower end of the locating barrel are open. The supporting plate is located above the supporting barrel, a first through opening is formed in the supporting plate, the center line of the first through opening and the axis of the supporting barrel are overlapped, the upper end and the lower end of the elastic piece are fixedly connected with the lower end face of the supporting plate and the bottom of the inner wall of the supporting barrel respectively, the supporting barrel is sleeved with the locating barrel, a plurality of clamping jaws used for locating top points of workpieces are arranged at the upper end of the locating barrel, and the inner side faces of the clamping jaws are gradually inclined towards the axis of the locating barrel from bottom to top. The workpiece clamping mechanism has the advantages that clamping is convenient and firm, relocating precision is high, good universality is achieved, and the structure is simple.
Owner:CHENGDU HONGSHAN TECH

Parallel clamping device for clamping small components

A parallel clamping device for clamping small components comprises a transmission part used for converting the rotation movement of a motor into the parallel movement of a clamp, a clamping tail end used for executing output, and a flexible clamp part serving as control clamping force. The action end of the transmission part is connected with the flexible clamp part. The flexible clamp part comprises a rigidity clamp body and a soft clamp body which are symmetrically arranged. The soft clamp body comprises a base, a spring, a spring adjusting rotary knob, a spring adjusting piece, a positioning pin and an upper part. A sliding groove is formed in the base. The upper part is located in the sliding groove in a sliding manner. The positioning pin is arranged in the sliding groove. The positioning pin is located on one side of the upper part. The other side of the upper part abuts against one end of the spring. The other end of the spring is arranged on the spring adjusting piece. The action end of the spring adjusting rotary knob abuts against the spring adjusting piece. The clamping tail end is located on the upper part. The parallel clamping device is high in precision, effectively suitable for the small component clamping assembling environment and good in universality.
Owner:ZHEJIANG UNIV OF TECH

Welding spot positioning method and system based on image processing

The invention belongs to the technical field of welding spot positioning, and relates to a welding spot positioning method based on image processing, which comprises the following steps: S1, reading a first welding spot estimated coordinate (xc, yc, zc) from a welding spot design file, wherein xc is the estimated abscissa of the center of the first welding spot, yc is the estimated ordinate of the center of the first welding spot, and zc is the shooting height of a camera; S2, moving the camera to an estimated coordinate; S3, performing automatic focusing based on the image definition; S4, after the clear image of the workpiece is obtained, calculating the center position coordinate of the welding spot workpiece, replacing the design coordinate value of the welding spot with the calculated coordinate value, and completing positioning of the welding spot coordinate; and S5, judging whether coordinate positioning of all the welding spots is completed or not, if so, ending the program, otherwise, reading the estimated coordinate of the next welding spot, and returning to the step S2. According to the invention, the welding spot coordinate positioning efficiency and accuracy can be improved. The invention further provides a welding spot positioning system based on image processing.
Owner:SOUTH CHINA UNIV OF TECH

Pseudo-range differential method with time maintaining characteristic

ActiveCN106772501ALow costSolve the data delay problemSatellite radio beaconingMobile stationComputer science
The invention discloses a pseudo-range differential method with a time maintaining characteristic. A pseudo-range differential strategy with the time maintaining characteristic is utilized. According to the method, a mobile station user receives reference station data; and the mobile station user can realize continuous positioning for about one minute, thereby ensuring positioning continuity of a user terminal, reducing data traffic of the mobile station user from a reference station, and reducing positioning cost of the user.
Owner:山东天星北斗信息科技有限公司

Process holes for back-end procedures in flat-shape covering part stamping production and locating method

The invention discloses process holes for back-end procedures in flat-shape covering part stamping production. Each process hole is in a periphery rounded equilateral triangle shape, and the size of each process hole is internally tangent to a circle of phi 3-phi 6. The process holes are used for part precise locating in procedures after trimming and punching and are formed in a supplement part of a drawing process. The number of the process holes is larger than or equal to 2. The invention discloses a locating method of a flat-shape covering part after trimming at the same time. According to the process holes for the back-end procedures in flat-shape covering part stamping production, it is guaranteed that the flat-shape covering part, an automobile engine hood outer plate, is fast and accurately located; locating precision is high; stamping production operation is convenient; product consistency is good; production efficiency is high; product quality is stable; and the product percent of pass is high.
Owner:LIUZHOU VOCATIONAL & TECHN COLLEGE

Descending track spotlight SAR (synthetic aperture radar) positioning method based on image matching

The invention discloses a descending track spotlight SAR (synthetic aperture radar) positioning method based on image matching. The method has the technical scheme that 1, a radar positioning geometrical configuration under a NEU coordinate system is built by using a ground point target T as an original point, and an SAR imaging image of the target point T on the imaging plane is obtained; 2, an SAR imaging matching graph is obtained by using a geometric distortion correcting mapping function between the imaging plane and the ground plane; 3, an affine transform matrix between P matching points and the SAR imaging matching graph and the set SAR imaging reference graph is obtained through an imaging matching algorithm, and the distance from the target point T and a sight line point C is obtained by using the affine transform matrix; 4, according to the set sampling frequency, the distance from the radar to the target point T and the distance from the radar to the sight line point C are obtained; 5, the coordinate values of the radar practical position A is calculated according to the results obtained in the steps 3 and 4. The method has the advantages that the precise positioning of a high-squint spotlight SAR can be realized; accurate position information can be provided for radar platform deflection correction.
Owner:XIDIAN UNIV

Path navigation method and device and computer readable storage medium

The invention discloses a path navigation method. The path navigation method comprises the following steps of acquiring a target planning path of a vehicle, and determining positioning information ofthe vehicle according to a radar pattern layer corresponding to the vehicle and laser radar; acquiring a first image corresponding to the vehicle by a depth camera; controlling the vehicle to drive according to the positioning information, the first image, an obstacle-prevention pattern layer and the target planning path of the vehicle. The invention also discloses a path navigation device and a computer readable storage medium. The vehicle is positioned by the radar pattern layer, path planning and obstacle prevention are performed according to the positioning information and the obstacle-prevention pattern layer, the positioning accuracy of the vehicle is not affected by the laser radar of which installation height is larger than the height of an obstacle when the obstacle exists in thetarget planning path, and the navigation accuracy and efficiency of the vehicle is further improved.
Owner:SHENZHEN SKYWORTH DIGITAL TECH CO LTD

Positioning and verticality adjusting device for rectangular latticed column of foundation pit by reverse construction method

The invention relates to a positioning and verticality adjusting device for a rectangular latticed column of a foundation pit by a reverse construction method. The positioning and verticality adjusting device comprises a base and a rigid frame body. An extending hole for an engineering pile is formed in the base, the frame body is formed by interconnecting the end parts of vertical upright rods, transverse connecting rods and inclined connecting rods, the bottom, the lower part and the upper part of the frame body are respectively provided with a bottom supporting and adjusting bracket capableof adjusting and limiting the verticality of the frame body and upper and lower positioning brackets capable of accurately adjusting limiting the latticed column in a vertical state by virtue of theframe body, the top of the frame body is provided with an operation platform which comprises an operation platform surface, a guard fence, a protection door, a hopper bracket and a hopper and is convenient for safely and vertically pouring concrete, the poured concrete naturally falls along with a pouring guide pipe at the axis position of the latticed column to be poured, impact disturbance on the latticed column is avoided, the positioning accuracy of the positioning and perpendicularity adjusting device cannot be affected, construction is convenient and efficient, the final forming effect of the poured engineering pile and the construction quality of foundation pit engineering can be guaranteed, and high practicability is achieved.
Owner:CHINA RAILWAY CONSTR ENG GROUP

Fixture for three-coordinate measuring machine of blade and method for establishing measuring coordinate system

The invention provides a fixture for a three-coordinate measuring machine of a blade and a method for establishing a measuring coordinate system. An upper surface of a fixture body is provided with a V-shaped tongue-and-groove, and a wedge-shaped surface of the V-shaped tongue-and-groove is completely coincided with a wedge-shaped surface of a blade tongue root. The V-shaped tongue-and-groove is positioned on a central line of a width of the fixture body. A set screw is positioned on a symmetric centre of a length and the width of the fixture body. When the measuring coordinate system of the fixture for the three-coordinate measuring machine of the blade is established, a coordinate plane is established through three points, a coordinate axis is established through projections of a connecting line of the two points on the coordinate plane and a coordinate origin point is determined by one point, and thereby the measuring coordinate system of the blade is fast and accurately established; moreover, the measuring coordinate system can be fast converted from the blade tongue root to the fixture body by using the rectangular fixture body so as to reduce time and difficulty of establishing the measuring coordinate system in the blade measuring process. The fixture of the invention has the advantages of simple structure, convenience for mounting and high locating precision, can be detached for multiple times without affecting the locating precision, can realize batch measurement of the blades and increases the blade measuring efficiency.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Sliding-type tool special for positioning clamp screw hole

The invention discloses a sliding-type tool special for positioning a clamp screw hole. The tool comprises a framework, wherein the framework is a square frame which is formed by connecting two transverse staff gauges and two longitudinal staff gauges; the surfaces of both of the longitudinal staff gauges and the transverse staff gauges are provided with scale marks; a transverse sliding chute isreserved inside both of the transverse staff gauges; a vertical sliding chute is reserved inside both of the longitudinal staff gauges; a transverse caliper is arranged between the two transverse staff gauges; a second through slot is reserved on the transverse caliper; a transverse sliding block is respectively arranged at the two ends of the transverse caliper; a transverse guide block is respectively arranged on the two transverse sliding blocks; the two transverse guide blocks are respectively matched with the two transverse sliding chutes; a vertical caliper is arranged between the two longitudinal vertical staff gauges; a first through slot is reserved on the vertical caliper; a vertical sliding block is respectively arranged at the two ends of the vertical caliper; a vertical guideblock is arranged on each vertical sliding block; the two vertical guide blocks are respectively matched with the two vertical sliding chutes; and both the vertical sliding blocks and the transverse sliding blocks are provided with scale mark pointers.
Owner:STATE GRID SHANDONG ELECTRIC POWER +1
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