10results about How to "Overcome positioning error" patented technology

The utility model relates to the technical field of automobile battery cover plate machining, in particular to an automobile battery cover plate edge trimmer which comprises a workbench, a rack is fixedly connected to the top of the right side of the workbench, and a cutting mechanism is arranged on the front face of the rack. Sliding bases are movably installed at the two ends of the top of the left side of the workbench, and overturning clamping mechanisms are arranged on the opposite sides of the top ends of the two sliding bases. According to the utility model, the bidirectional screw rod drives the sliding seat to be matched with the turnover clamping mechanism for use, and the electric push rod B controls the limiting block and the motor C drives the clamping frame to cooperatively act, so that cover plates with different lengths are clamped and limited and locked after being turned over; the problems of positioning errors and machining interruption caused by manual clamp adjustment and workpiece overturning in the prior art are solved, and the clamping precision, the machining consistency and the production continuity are remarkably improved.

The invention discloses a metal pipeline anchor pattern degree detection method and system based on image analysis, and relates to the technical field of pipeline quality detection, and the method comprises the steps: collecting a panoramic image; identifying an independent anchor pattern depression core area; generating a contour mask of the independent anchor pattern recess; segmenting the anchor pattern depression contours to determine independent anchor pattern depression contours; determining the depth estimated value of the independent anchor pattern recess; screening key detection pits; dividing the key detection recesses into a plurality of measurement groups; controlling the photoelectric measuring head to project measuring light to the corresponding measuring group, and calculating actual depth data of the key detection recess based on the reflected light; and summarizing all actual depth data to obtain an anchor grain degree detection result. According to the method, the three-dimensional space coordinates of each anchor pattern recess can be accurately obtained, the deepest position of the anchor pattern can be directly positioned, meanwhile, key recesses which have great influence on the overall anchor pattern depth average value are screened out based on the anchor pattern depth estimated value, general recesses are ignored, and invalid measurement operation is directly reduced by more than 50%.

The invention discloses a power distribution network voltage disturbance source positioning method and device, a medium and a program product, and belongs to the field of positioning, and the method comprises the steps: obtaining the network topology and line impedance parameters of a power distribution network and real-time voltage monitoring data, constructing an equivalent impedance matrix and an electrical distance matrix, recognizing a voltage disturbance event, and extracting a response time difference. And combining the electrical distance matrix and the disturbance propagation speed to construct an error function so as to determine a preliminary disturbance source node, and verifying whether the preliminary disturbance source node is an actual disturbance source through a parameter identification method. If verification is passed, the deviation between the theoretical disturbance arrival time and the actual disturbance arrival time is calculated, the positioning error is evaluated, and finally a high-precision disturbance source positioning result is obtained, and the problem that the voltage disturbance source of the power distribution network cannot be accurately and efficiently positioned in the prior art is effectively solved.

The application discloses a metal pipeline anchor concave degree detection method and system based on image analysis, and relates to the technical field of pipeline quality detection. The method comprises the following steps: collecting panoramic images; identifying independent anchor concave core areas; generating independent anchor concave contour masks; segmenting anchor concave contours to determine independent anchor concave contours; determining depth estimates of independent anchor concaves; screening key detection concaves; dividing the key detection concaves into multiple measurement groups; controlling a photoelectric probe to project measurement light to the corresponding measurement groups, calculating actual depth data of the key detection concaves based on the reflected light; and collecting all the actual depth data to obtain anchor concave degree detection results. The application can accurately obtain the three-dimensional space coordinates of each anchor concave, directly locate the deepest part of the anchor concave, and screen out key concaves that have a greater impact on the average value of the overall anchor concave depth based on the anchor concave depth estimates, thereby ignoring general concaves and directly reducing more than 50% of invalid measurement operations.

The application discloses a kind of robust DOA estimation methods based on sparse bayesian learning, belong to array signal processing field, the method of this application first introduces position error parameter, and determines the prior distribution of grid error and element position error, secondly with the aid of sparse bayesian learning model, establish joint probability density distribution function, finally with the aid of maximum expectation algorithm to each unknown parameter is iterated, obtains spatial spectrum diagram, estimates the direction of incident signal.This application method can better azimuth estimation accuracy and azimuth resolution, still have good performance under the condition of less snapshot, low signal-to-noise ratio, and the application method has good robustness to the array system that exists element position error, has greater engineering application value.

The invention discloses automatic paving and winding forming equipment, relates to the technical field of manufacturing of electric power system insulation bucket arm vehicles, and particularly belongs to a design and manufacturing method of automatic paving and winding forming equipment of an insulation extension arm. In order to realize the automatic winding, paving and enhancing process of the extending arm of the insulated boom truck, the invention designs a special forming device for a multi-edge cylinder extending arm structure, and the high-precision automatic paving and enhancing of the insulated extending arm in an edge area is realized by assembling trapezoidal cushion angle rolls at two ends of a core mold and integrating a cloth tape carding and rapid clamping device; according to the equipment, the flatness and compactness of a paving layer are guaranteed, meanwhile, the position precision of cushion corner paving and the overall stability of a system are remarkably improved, and the equipment has the advantages of being convenient and fast to install and adjust, high in paving and positioning precision, good in operation simplicity and convenience, long in service life and high in economic benefit; the technical problems that in the traditional technology, a corner padding cloth belt is prone to sliding, the mechanism manufacturing cost is high, and operation is complex are effectively solved.

The application relates to a knee replacement implant positioning method, system and storage medium. The method comprises the following steps: acquiring a three-dimensional bone model of an anatomical structure; the three-dimensional bone model is a three-dimensional femur model and / or a three-dimensional tibia model; marking a plurality of anatomical landmark points on the three-dimensional bone model; establishing a bone coordinate system of the three-dimensional bone model according to the adjusted anatomical landmark points; and placing an implant three-dimensional model on the three-dimensional bone model under the bone coordinate system or an image coordinate system. The method can fine-tune the positions of the anatomical landmark points, and accurate implant positioning planning values can be obtained; the bone coordinate system established according to the adjusted anatomical landmark points can solve the position error problem caused by the fact that the bones are not directly opposite to the image coordinate system when the patient takes CT, so that the position parameters of the prosthesis placement are more accurate; the implant placement parameters are calculated in a simulation mode, instead of the manual adjustment mode, so that the automation and intelligent degree can be improved.

The utility model discloses a hydraulic type mechanical opening degree limiting mechanism of water turbine relates to water turbine technical field. The utility model discloses an installation board, the top of installation board is provided with adjusting assembly, one side of installation board bottom is provided with limit mechanism, the limit mechanism includes the shell, the top of shell is fixedly connected with installation board, the one side fixed connection of shell inner chamber has motor, the output fixed connection of motor has the lead screw, one side of lead screw is through bearing and the inner wall movable joint of shell. The utility model discloses through motor drive lead screw and drive screw bushing movement, cooperate electric push rod drive limit post telescopic, and the automation adjustment limit position does not need to disassemble oil cylinder like pure hydraulic scheme, also does not need staff to enter the narrow space manual rotation screw rod, and the adjustment process of opening degree limiting range is greatly simplified, improves the operation efficiency, and also avoids the security risk of personnel operation in the narrow space.

The utility model belongs to the field of perpendicularity detection devices, and particularly relates to a hydraulic pump blade notch perpendicularity detection device which comprises a base assembly, a supporting assembly and a clamping assembly, the base assembly comprises a bottom box, a step groove is formed in the top of the bottom box, and the supporting assembly comprises a supporting plate and a servo motor. Four through grooves are formed in the supporting plate at equal angles, a support is fixedly connected to the bottom end face of the supporting plate, a worm gear is fixedly connected to the center of the support, a coupler is matched with the output end of the servo motor, a worm is matched with the coupler, and the clamping assembly comprises an electric push rod. The output end of the electric push rod is fixedly connected with a clamping block; precise rotary positioning of the supporting plate is achieved through meshing transmission of the worm and the worm wheel, synchronous data collection is achieved through the symmetrically-arranged perpendicularity detectors, distributed clamping guided by the through grooves is adopted, the blade notch perpendicularity detection speed is increased, and perpendicularity detection of blade notches of different sizes is compatible.

The invention discloses a positioning method combining an L-M algorithm and Kalman filtering and related equipment, and relates to the technical field of wireless communication. The method is applied to a data processing module of a positioning system, and the system comprises a signal transmitting module and at least three base stations. A positioning signal is transmitted through a signal transmitting module, a base station receives the signal and records the arrival time, the time difference of arrival (TDOA) of the signal is calculated, and a nonlinear coordinate calculation formula of the position of an article is constructed in combination with the position of the base station. An objective function is iteratively optimized by using an L-M algorithm, and an optimal solution is gradually approached by dynamically adjusting a damping parameter, so that measurement errors caused by a multipath effect and non-line-of-sight propagation are overcome. And then, performing dynamic prediction and updating by adopting an adaptive extended Kalman filter (AEKF) algorithm, and optimizing an initial positioning result to further improve positioning precision and stability. According to the invention, the problem of insufficient positioning precision and stability in a complex environment is solved, and the precision and robustness of article positioning are improved.