78results about How to "Solve the positioning accuracy" patented technology

The invention discloses an unmanned aerial vehicle ground target real-time positioning method with automatic extraction and gathering of multiple control points, and belongs to the unmanned aerial vehicle reconnaissance image processing field. The method comprises the following steps: a first step, acquiring N (N>=3) unmanned aerial vehicle target reconnaissance images satisfying a certain condition; a second step, extracting and correcting coordinates of a quasi-ground control point (GCP) of each reconnaissance image, and forming a quasi-GCP group; a third step, establishing a panoramic remote sensing image through an image stitching algorithm, and achieving quasi-GCP gathering; a fourth step, carrying out geometric correction of the panoramic image based on the quasi-GCP; and a fifth step, calculating geographic latitude and longitude coordinates of a reconnaissance target, and achieving target positioning. By introducing the multi-image coordinate extraction mechanism, the algorithm effectively overcomes a contradiction between real-time performance and positioning accuracy in a conventional unmanned aerial vehicle target positioning algorithm, and can effectively improve the positioning accuracy while ensuring the algorithm real-time performance.

The invention relates to an electric power plant condenser high pressure water shooting flow online washing robot technology that cleans the electric power plant condenser by high pressure water shooting flow. Setting the mechanism arm locating device and high pressure soft tube into the condenser by using the combination method and install structure of locating mechanism arm orientation device formed by extending mechanism arm and rotating mechanism arm, high pressure soft tube manage device, and high pressure spray head control device, locates the spray head on the rotating mechanism arm by computer control system, sends to the inner of the condenser copper pipe, and cleans the dirt in the inner of the condenser copper pipe by high pressure water shooting flow. The generating set needs not stop while cleaning. The invention has advantage of simple structure, no pollution and high reliability.

The invention discloses a multistage positioning method for a mobile terminal. In the method, the mobile terminal is rapidly roughly positioned by adopting a global system for mobile communication (GSM) base station positioning method, and in a range determined by a GSM base station, the GSM mobile terminal is accurately positioned by adopting a WiFi/ZigBee positioning technology. The invention also discloses a device adopting the multistage positioning method. The device comprises a host and a submachine. A GSM base station positioning module and a WiFi/ZigBee positioning module are installed on the submachine. A master control module is installed on the host, and is used for controlling the working conditions of the GSM base station positioning module and WiFi/ZigBee positioning module of the submachine. In the method and the device, a plurality of positioning methods are combined so as to effectively eliminate conflicts between the positioning range and positioning accuracy of the mobile terminal.

The invention relates to a successive grid subdivision method for microseismic positioning. The method is based on the existing grid search amplitude superposition algorithm. A further subdivision search is carried out near the point to find the global maximum energy focus value, which avoids the global subdivision to improve the positioning accuracy, and obtains higher positioning accuracy with a small calculation cost. The test proves that the present invention effectively solves the problem that the efficiency and calculation accuracy of the existing method are difficult to balance by adopting the perforation positioning method of grid subdivision one by one. Higher microseismic positioning accuracy can be obtained with a lower calculation cost. The global subdivision is avoided, the workload is reduced, and the positioning efficiency is improved under the premise of ensuring the positioning accuracy.

The invention discloses a structure sharing multi-sensor fusion positioning system for an automatic driving vehicle. The system comprises a vehicle kinematics model module which predicts the motion state of the vehicle according to a vehicle kinematics model; a laser SLAM algorithm module; and an extended Kalman filtering module used for fusing the vehicle prediction pose provided by the vehicle kinematics model and the vehicle optimization pose provided by the laser SLAM algorithm by utilizing the extended Kalman filtering technology so as to obtain accurate vehicle pose information. According to the structure sharing multi-sensor fusion positioning system for the automatic driving vehicle, positioning can be effectively achieved through the arrangement of the vehicle kinematics model module, the laser SLAM algorithm module and the extended Kalman filtering module.

The invention relates to an image processing method of a full automatic wire bonder image processing system. The steps of the invention are that: (1) the collected images are calibrated; the calibration algorithm adopts standard checkerboard grid; the best fit algorithm is used for establishing a lookup table of feature points which are regularly distributed on the surface of the images; the feature points are found and analyzed, the deflection is calculated, then the feature points are amended; (2) by adopting different identification and positioning processes for the feature points of pins and chips, the distinguish of the geometric size, shape, location, and the like, is obtained; the location dispersion of the chips and the pins is accurately measured. The invention has the beneficial effects that the problem of the automatic alignment of the wire bonder is better resolved, and the image processing method of the invention further improves the speed and accuracy of alignment and position as well as consistency.

The invention relates to the field of automobile manufacturing devices, in particular to a car lock lug welding fixture. By the car lock lug welding fixture, the problem that an existing lock lug welding fixture is insufficient of space for arrangement is solved. A plurality of positioning seats (4) are arranged on a rectangular welding fixture platform (1), a lug clamping unit is arranged on each positioning seat (4), each lug clamping unit comprises a lug clamping cylinder (5), a lug positioning cylinder (6) and a wedge mechanism (7), each lug positioning cylinder (6) is connected with the corresponding wedge mechanism (7) and drives the same to move horizontally, and wedges (18) can be driven to move by being connected with the corresponding lug clamping cylinders (5). The car lock lug welding fixture is used for welding automotive lugs.

The invention relates to a novel perception system structure for human bionic electronic skins. The structure includes acrylamide and lithium chloride based positioning layer gel and ionic liquid BMIMBF4 polymer based perception layer gel; and a VHB belt is arranged between the acrylamide and lithium chloride based positioning layer gel and the ionic liquid BMIMBF4 polymer based perception layer gel. Thus, the contradiction between positioning precision and system complexity in a distributed sensing system can be solved; and the structure can enhance the positioning precision without increasing the complexity of the system, so that the low cost and reliability of the system can be guaranteed.

The invention belongs to the technical field of precision vibration isolation, and relates to a zero-stiffness vibration isolator with a rolling oscillating bearing angle degree decoupling function and a vibration isolation system. A sleeve of a vibration isolator body and a lower mounting plate as well as a piston barrel and the sleeve are lubricated and supported through air floatation surfaces respectively, degree of freedom of angular motion between an upper mounting plate and the lower mounting plate is decoupled by a rolling oscillating bearing, and voice coil motors, displacement sensors, limit switches, a controller and a drive form a closed position loop feedback control system which is used for precision control of relative position of the upper mounting plate and the lower mounting plate. The zero-stiffness vibration isolator has the advantages of zero three-dimension stiffness, high positioning precision and angle degree decoupling and can obtain extremely-low-intrinsic-frequency and outstanding low-frequency/ultralow frequency vibration isolation performances, and accordingly high-performance vibration isolation of ultraprecise measuring instruments, machining equipment and particularly step-scan lithography machines is achieved.

The invention discloses an eddy-current damping vibration isolator with coplace air flotation orthogonal decoupling and two-dimensional flexible hinge angle decoupling and belongs to the technical field of precise vibration isolation. A sleeve of the main body of the vibration isolator and an air flotation plate are lubricated and supported by an air flotation surface, a piston sleeve and the sleeve are lubricated and supported by the air flotation surface, an eddy-current damper is used for attenuating vibrating energy and improving positioning stability, the freedom of the horizontal linear motion between an upper installation plate and a lower installation plate is decoupled through a coplace orthogonal air flotation guide rail, the freedom of angular motion between the upper installation plate and the lower installation plate is decoupled through a two-dimensional flexible hinge, and a voice coil motor, a displacement sensor, a limiting switch and controller and a driver form a position closed-loop feedback control system to accurately control the relative positions of the upper installation plate and the lower installation plate. The eddy-current damping vibration isolator has the advantages of being zero in three-dimensional rigidity, high in positioning accuracy, and capable of performing linear motion freedom decoupling and angular motion freedom decoupling, and can effectively meet the high-performance requirements of ultra-precise measurement instruments and processing equipment, particularly step scanning photoetching machines.

The invention relates to the field of mechanical manufacturing tool fixtures, in particular to an inner spline part key side positioning spline expansion device and a machining process thereof. The device comprises a flange plate, an axial positioning body, a conical radial positioning body, an O-shaped rubber ring, a key side positioning spline expansion sleeve and a pull rod, wherein the conicalradial positioning body is arranged on the flange plate connected with a machine tool, and is fixedly connected with the flange plate; the axial positioning body is arranged on the flange plate, andis fixedly connected with the flange plate; and a groove is formed in the outer peripheral wall of the key side positioning spline expansion sleeve. The device solves the problems of difficult positioning, need of repeated measurement and machining in the machining process and low efficiency in traditional machining of disc parts with involute spline holes, has the advantages of precise and stablepositioning, firm and efficient expansion, improvement of the machining efficiency and stable part quality, and meets the use demands of users.

The invention relates to a numerical control machine tool X-Y working table positioning error real-time compensation method based on DSP. A laser interferometer is applied to measure the positioning error of a numerical control machine tool X-Y working table at different speeds and positions, a GA-BP neural network is established in MATLAB to train the measured data, the positioning error modelingand prediction in the DSP according to the weight and the threshold value optimized by training. According to the method, the modeling difficulty is simplified through GA-BP neural network modeling,so that the compensation precision is improved; according to the powerful operational capability of the DSP, the GA-BP positioning error model is transplanted into the DSP, so that the system meets the requirements of real-time compensation.

The invention discloses an autonomous positioning method of an end effector of an under-constraint cable-driven parallel robot. A PCF algorithm is combined with a factor graph algorithm, the positionof the end effector is accurately positioned under the condition of not relying on external signal input by using a multi-sensor data fusion technology, the IMU inertial sensor data is processed by using a PCF method, and the posture of the end effector of the under-constraint cable-driven parallel robot is accurately obtained, and meanwhile, the measurement precision of the position of the end effector is improved; and moreover, the selected sensor is a low-cost IMU, a dynamometer, a motor tachometer and the like, and the low-cost can be realized while the same positioning precision of the end effector is achieved. According to the autonomous positioning method, the problem of the positioning accuracy of the end effector of the under-constraint cable-driven parallel robot at the low costand complex environment can be solved, oscillation suppression control of the under-constraint cable-driven parallel robot is realized, and the application range of the under-constraint cable-driven parallel robot is expanded.

The invention discloses an automatic positioning welding system for a box. The automatic positioning welding system comprises a working table. A welding robot is installed in the back of the working table, a base is installed in the front of the working table, a rotating platform is installed at the upper end of the base, driving motors are symmetrically installed in the front and the back of the rotating platform, shafts of the driving motors are sleeved with connecting blocks, the connecting blocks are sleeved with bearings, the bearings are fixed to the base through bearing pedestals, rectangular positioning plates are fixed to the rear ends of the connecting blocks in a bolted connection mode, and four clamping devices are symmetrically arranged at the four corners of each rectangular positioning plate respectively. By the utilization of the double-station design, preparation time is shortened, production efficiency is improved, positioning precision is guaranteed through the clamping devices, and the quality of welding parts of the box is improved.

The invention relates to an obstacle positioning method and device based on ultrasonic radars and computer equipment. The obstacle positioning method based on the ultrasonic radars comprises the stepsthat an obstacle detection area is divided into a plurality of subareas according to the installation positions and detection ranges of a first ultrasonic radar and a second ultrasonic radar and thevehicle body size of a robot; the first ultrasonic radar and the second ultrasonic radar are respectively controlled to detect the obstacle to obtain a first detection distance and a second detectiondistance; according to the first detection distance and the second detection distance, the sub-region where the obstacle is located is determined. The problem that cost and precision are difficult toconsider when ultrasonic radars are used for obstacle positioning is solved.

The invention discloses a train positioning and navigation method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining a GNSS signal, and when the signal intensity of the GNSS signal does not meet a preset standard; acquiring a position fingerprint database of the train based on the time sequence in the train running process; obtaining a first SINS signal; and obtaining position information of the train from the position fingerprint database by adopting a DTW algorithm, combining the position information of the train with the first SINS signal, and correcting an accumulated error deviation value of the first SINS signal by adopting Kalman filtering to obtain an optimal estimation position of the train. The method has the advantages of high precision, high reliability, high accuracy and the like.

The invention discloses a satellite selection method based on simulated annealing and gradient descent. The method comprises: firstly, using a simulated annealing algorithm for global search; findingout the range of the optimal solution; finding a minimum value in an optimal solution range by utilizing a gradient descent method. The method specifically comprises the following steps: receiving allvisible satellite signals, selecting visible satellites with the maximum elevation angle and the minimum elevation angle, generating a new solution, selecting a method for generating the new solutionby simply converting the current new solution, and then calculating a precision factor corresponding to the new solution; subtracting the evaluation function of the old solution from the evaluation function of the new solution to obtain a temperature increment, and judging whether to accept the new solution or not through an acceptance criterion; taking the optimal local space searched by the simulated annealing algorithm as an input sample of gradient descent, and performing local accurate search by the gradient descent so as to output an optimal solution. The method is short in consumed time, and the contradiction between positioning precision and rapid positioning is solved.

The invention discloses an electromagnetic damping vibration isolator with a coplanar air floatation orthogonal decoupling function and an angular decoupling function by the aid of a flexible membrane, and belongs to the technical field of precision vibration isolation. Space between a sleeve of a vibration isolator body and a lower mounting plate is lubricated and supported by an air floatation plane, electromagnetic dampers are used for attenuating vibration energy and improving the positioning stability, the degree of freedom of horizontal linear movement between an upper mounting plate and the lower mounting plate is decoupled by coplanar orthogonal air floatation guide rails, the degree of freedom of angular movement between the upper mounting plate and the lower mounting plate is decoupled by the flexible membrane, and voice coil motors, displacement sensors, limit switches, a controller and a driver form a position closed-loop feedback control system to precisely control relative positions of the upper mounting plate and the lower mounting plate. The electromagnetic damping vibration isolator has the advantages of zero three-dimensional stiffness, high positioning precision and capabilities of sufficiently decoupling the degree of freedom of linear movement and sufficiently decoupling the degree of freedom of angular movement, and can effectively realize high-performance vibration isolation for ultra-precision measuring instruments and processing equipment, and particularly for step-scan lithography machines.

An eddy current damping vibration isolator of double-layer air-flotation orthogonal decoupling and flexible film angle decoupling belongs to the technical field of precise vibration isolation. An air-flotation face is used for lubricating and supporting between a sleeve of a vibration isolator main body and an air-flotation plate. An eddy current damper is used for attenuating vibration energy. An air-flotation face is used for lubricating and supporting between the air-flotation plate and a lower installing plate. A horizontal linear motion freedom degree between an upper installing plate and the lower installing plate is decoupled through a double-layer orthogonal air-flotation guide track, and an angle motion freedom degree between the upper installing plate and the lower installing plate is decoupled through a flexible film. A voice coil motor, a displacement sensor, a limit switch, a controller and a driver form a position closed loop feedback control system so as to conduct precise control for relative positions of the upper installing plate and the lower installing plate. The eddy current damping vibration isolator has the advantage of being free of rigidity in three dimensions, high in location precision and capable of fully decoupling the linear motion freedom degree and the angle motion freedom degree and can effectively achieve high-performance vibration isolation in ultra precise measurement instruments and machining devices, especially stepping scanning photoetching machines.

The invention discloses an airport wheel chock and personnel positioning system, which comprises a background server, at least one airport wheel chock positioning device and at least one personnel positioning device, Each of the airport wheel chock positioning device and the personnel positioning device comprises a charging management circuit, a power management circuit, a control unit, a data communication module, a positioning module, a near field communication module, a Bluetooth module and a motion detection module; The power management circuit is connected with the control unit, the datacommunication module, the positioning module, the near-field communication module, the Bluetooth module and the motion detection module. The power supply management circuit provides electric energy ofrequired voltage for the power utilization part; The control unit is connected with the data communication module, the positioning module, the near-field communication module, the Bluetooth module and the motion detection module. According to the airport wheel chock and personnel positioning system, high-precision positioning can be conducted on the airport wheel chock and personnel, standardizedoperation and post automatic supervision of an airport are enhanced, and responsibility tracing is achieved.

The invention discloses an in-band positioning signal transmitting method and in-band positioning system of a communication network. The in-band positioning system comprises a management network element, a positioning center network element, and a positioning network element. The management network element is arranged in the communication network and is used for managing one or more positioning network elements, and providing a synchronous reference clock for the positioning network elements. The positioning center network element is arranged in the communication network and is used for providing position-estimating information for a terminal on the basis of the positional information of the positioning network elements, and sending the position-estimating information to the terminal. The positioning network element uses a frequency band the same as that of the communication network, and is used for generating, according to positioning signal auxiliary information, an in-band positioning signal for measuring distance, and adjusting the sending clock of the in-band positioning signal according to a difference value between a local transmitting clock and a synchronous reference clock provided by the management network element, and sending the in-band positioning signal according to the adjusted transmitting clock. The in-band positioning system solves a contradiction between positioning precision and cost of the communication network, improves a high-precision clock synchronization mechanism, and solves problems of low positioning precision and high laying cost of the communication network.

The invention discloses a machine for detecting the inclination angle of a rear axle of a car. The machine comprises a PLC and further comprises a positioning clamping mechanism, a centering positioning mechanism and an angle detecting mechanism which are connected with the PLC and fixed to a rack. The positioning clamping mechanism comprises a rear axle clamping air cylinder, a clamping arm, a rear axle compressing block, a rear axle plug pin positioning air cylinder, a positioning pin, a guiding sleeve, a positioning supporting block and a clamping base. The output end of the rear axle clamping air cylinder is connected with the rear axle compressing block through the clamping arm, and the bottom of the rear axle compressing block corresponds to the positioning supporting block. The positioning pin is arranged below the positioning supporting block and sleeved with the guiding sleeve. The centering positioning mechanism comprises a rear axle workpiece positioning block, a centering mechanism driving air cylinder, a connecting hinge, a connecting rod, an expanding sleeve driving air cylinder, a centering linear guide rail, a platform connecting support, a fixing supporting seat, an expanding sleeve driving rod and an expanding sleeve. Automatic feeding and discharging are conducted through a robot, the problem of the positioning precision is solved, the product quality is ensured, the labor intensity of operators is lowered, and the production efficiency is improved.