11results about How to "Achieving Positioning Accuracy" patented technology

A laser-assisted positioning mechanism for spinning belongs to the technical field of mechanical processing. The mechanism aims to solve the problems of low precision and long calibration time in the traditional positioning method of multi-axis numerical control spinning equipment. It includes a sliding table module composed of a sliding table support and a sliding table body. The sliding table body is connected to the sliding table support through a linear guide rail. A servo motor drives the displacement of the sliding table body through a synchronous belt transmission mechanism, which includes a first synchronous wheel, a second synchronous wheel, and a closed-loop synchronous belt. The bottom of the sliding table body is fixed to the synchronous belt. A laser level is rigidly fixed to the side of the sliding table body through four symmetrical mounting holes and a mounting slot, projecting a laser reference line parallel to the axis of the spinning wheel. The bottom of the sliding table support is provided with a double fixed seat, which is rigidly connected to the processing platform through bolts. The mechanism realizes a displacement accuracy of 0.1 millimeters through closed-loop control of the servo motor, allowing the laser reference line to be dynamically adjusted along the axis of the spinning wheel.

The utility model discloses a folding warehouse cage, including left side plate, right side plate, front side plate, back side plate and bottom plate, four side plates and bottom plate all are equipped with support pole and base pole, the both sides edge of left side plate, right side plate is equipped with fixed hook and hooks back side plate, and the back edge and the front edge of bottom plate are hinged through spring steel wire and back side plate, front side plate respectively, and front side plate, back side plate all are by upper side plate and lower side plate and are folded to spring steel wire hinge, and the both sides of front side plate are equipped with bolt mechanism, and the bolt rod, bolt handle and bolt hole are locked fast, and the bottom of bottom plate is equipped with brake universal wheel and fixed step plate in four corners, and cross -over reinforcing rod promotes the bearing, and the bottom of bottom plate is equipped with stacking frame below four corners, and the bottom of stacking frame is equipped with U type recess. Make single person complete folding / unfolding, and empty cage volume reduces, and fixed hook adds bolt double locking, and transportation zero is loose, and reinforcing rod and universal wheel brake linkage slope do not slip, and U type recess is accurate positioning, and four layer stack whole body tilts and reduces, and the utilization rate of warehouse improves.

The utility model discloses a raw cotton impurity analyzer with an antistatic roller shaft, which belongs to the technical field of textile machinery, and comprises a rack, a surface table at a feeding end and a carding roller, the roller shaft is arranged at the upper end of the surface table, the roller shaft is made of an integrated antistatic nylon material, transverse flutes are arranged on the surface of the roller shaft, and the surface resistivity is 10-10 omega.cm; positioning assemblies are installed on the two sides of the rack, each positioning assembly comprises a hydraulic air cylinder, a positioning clamping jaw and a pressure sensor, the telescopic end of each hydraulic air cylinder abuts against the end of the corresponding roller shaft through the corresponding positioning clamping jaw so that the roller shaft can be attached to the cambered surface of the corresponding surface table, and the pressure sensors monitor pressure values in real time and feed the pressure values back to the control system; by means of the integrated antistatic nylon roller shaft, the precise positioning mechanism driven by the hydraulic air cylinder and the bevel gear transmission assembly, electrostatic interference is effectively eliminated, millimeter-level dynamic positioning is achieved, friction loss is reduced, and raw cotton impurity detection precision and equipment operation stability are remarkably improved.

The application provides a wafer laser cutting machine and a heterogeneous integrated wafer process parameter optimization method, and belongs to the technical field of laser cutting equipment. The wafer laser cutting machine comprises a cutting platform, an industrial computer and a laser, a Y-direction linear motor is arranged on the cutting platform, a clamp for clamping a wafer is arranged on the Y-direction linear motor, vertical columns are arranged on the two sides of the Y-direction linear motor, the vertical columns are arranged on the cutting platform, an X-direction linear motor is arranged on the vertical columns, a Z-direction linear motor is arranged on the X-direction linear motor, a laser cutting head is arranged on the Z-direction linear motor, the laser cutting head is electrically connected with the laser, the light source of the laser cutting head is infrared light with a wavelength of 1080 nm, and the X-direction linear motor, the Y-direction linear motor and the Z-direction linear motor are electrically connected with the industrial computer. Compared with the traditional laser cutting machine, the wafer laser cutting machine improves the processing efficiency on the basis of maintaining high-precision processing.

This invention discloses a guide needle path navigation method and system based on electromagnetic sensing, comprising: if the guide needle position deviates from the correction path by more than a preset safety threshold in a dynamic image sequence, then the deviation area is detected by an image processing algorithm, a deviation vector is generated and mapped to a three-dimensional coordinate space to determine the precise adjustment angle and distance of the guide needle; based on the deviation vector and the correction path coordinate sequence, the rotation angle and advance distance required for guide needle adjustment are calculated using an inverse kinematics algorithm, a control signal is generated, and transmitted to the guide needle driving device through an electromagnetic feedback system to obtain an automatic adjustment command for the guide needle; the adjusted guide needle position and attitude data are obtained from the execution result of the guide needle driving device, and the positioning accuracy is calculated by comparing it with the correction path coordinate sequence using an error analysis algorithm to determine whether the guide needle has reached the sub-millimeter level accuracy requirement.

This invention discloses a machine vision method for measuring the intersection points of two circles based on dynamic fitting and local optimization, comprising the following steps: S10, image acquisition; S20, preprocessing and edge detection; S30, initial circle parameter acquisition; S40, initial intersection point estimation and candidate region acquisition; S50, energy function construction and optimization; S60, outputting accurate circle intersection point coordinates. This invention utilizes the geometric constraints of the intersection points of two circles and local image features to construct an objective function with the intersection point coordinates as the direct optimization variable. Through iterative search or solution, this function is minimized, thereby directly obtaining the optimal intersection point estimate. The entire scheme integrates circle parameter estimation and intersection point localization into a unified optimization process, with mutual constraints and corrections.

The invention relates to the technical field of multi-target tracking and azimuth angle high-precision measurement, and discloses a target point azimuth angle high-precision measurement method in large-size antenna measurement, which comprises the following steps of: firstly, acquiring an image of a measured target which comprises a plurality of preset mark points, and then processing the image, extracting the physical coordinates of all the target points contained in the image, the physical coordinates of all the target points including the coordinates of the plurality of preset mark points and the coordinates of the interference points; and matching the preset model of the measured target with the physical coordinates of all the target points. By constructing a preset model of a measured target and matching the model with physical coordinates (including mark points and interference points) of all extracted target points, coordinates of a plurality of preset mark points can be accurately identified and separated from a complex image background; and the accuracy of target point identification and the anti-interference capability of the whole measurement method are obviously improved.

The application relates to the field of Bluetooth positioning technology, in particular to a Bluetooth positioning method and system based on a logarithmic distance path loss model, which comprises the following steps: acquiring signal strength indication data of each Bluetooth access point at multiple reference points in a target area; fitting path loss parameters of the logarithmic distance path loss model according to the signal strength indication data at each reference point and the actual distance from the corresponding reference point to each Bluetooth access point; generating a reference signal strength matrix based on the signal strength values collected at each reference point, acquiring the signal strength values of each Bluetooth access point at a target point to be positioned, and forming a target signal strength vector. The application generates weights based on error reciprocals, performs weighted average on the measured signal strength of neighbor reference points, obtains compensated signal strength values, effectively suppresses the interference of indoor environment multipath effect, signal fluctuation and path loss model parameter fitting deviation on signal strength estimation, and makes the compensated signal strength closer to the real value.

The utility model relates to the technical field of railway vehicle manufacturing and maintenance equipment, in particular to bogie frame turnover equipment with a positioning function, which comprises a support frame, a height adjusting device, a position adjusting device, a clamping device, a turnover device, a positioning device and a control system. Fixing bases are installed in the supporting frame through the two height adjusting devices and the position adjusting device, rotating discs are installed on the two fixing bases through the overturning devices, the clamping devices are installed on the side walls of the rotating discs, the position of a framework is preliminarily detected through a visual recognition system, namely a camera, and the clamping devices are installed on the side walls of the rotating discs. The control system adjusts the distance between the two sets of laser range finders according to deviation information, the position of the framework is further accurately positioned, light beams emitted by the laser range finders are used for auxiliary calibration, it is ensured that the deviation of the framework in the horizontal direction and the vertical direction is controlled within + / -1 mm, and in the overturning process, the positioning device continuously monitors the position of the framework, and the positioning accuracy is improved. And the stability is always kept.

This utility model discloses a miniature loudspeaker, including a diaphragm assembly and a voice coil. The diaphragm assembly includes a center mount, which includes a body. The body has downwardly bent extension arms on opposite sides, and the bottom of each extension arm has an outwardly bent mounting arm. The voice coil is fitted onto the mounting arm. This miniature loudspeaker ensures effective suspension depth of the voice coil in the magnetic gap, significantly improving magnetic field utilization, BL value, and BL symmetry, optimizing distortion. It also eliminates the need for a separate frame and its corresponding assembly process, achieving a balance between high performance and low cost. The voice coil is located outside the extension arms, allowing for a wider diaphragm surround, thereby improving the low-frequency acoustic performance of the miniature loudspeaker.

The invention belongs to the technical field of robot positioning and computer vision, and provides a non-intrusive positioning method, system, device and medium for a robot in a cockpit, the method is realized based on a 3D Gaussian splashing technology, and the method comprises the following steps: in an offline state, constructing a high-fidelity three-dimensional digital model capable of generating a virtual image; before a task is executed, calculating an initial six-degree-of-freedom pose of the visual sensor under a target cockpit coordinate system; in the execution process, the initial six-degree-of-freedom pose is used as the current estimation pose of the first iteration, and the pixel-level luminosity error between the virtual image and the real image is calculated in real time; and solving a six-degree-of-freedom pose increment through a luminosity error, superposing the six-degree-of-freedom pose increment to a current visual sensor pose, updating to obtain a current estimated pose, inputting the current estimated pose into next iteration, and carrying out drifting-free continuous estimation of the robot. According to the method, centimeter-level, drifting-free and marker-free high-precision closed-loop positioning can be realized, and the aviation airworthiness requirements are met.