266 results about "Coordinate-measuring machine" patented technology

The present invention relates to a contour accuracy compensation method and system for a precision hot-press forming mold. The method comprises: delineating grids on a three-dimensional model of a hot-press forming mold to obtain mold surface grid data; performing curvature analysis to obtain a high-curvature region and a low-curvature region; performing high-density sampling on the high-curvature region, and performing low-density sampling on the low-curvature region, so as to obtain a sampling point set; using a coordinate measuring machine to perform three-dimensional coordinate measurement on the sampling point set to obtain surface contour data; performing comparative analysis on the surface contour data and a theoretical model to obtain a contour error distribution; on the basis of the contour error distribution, using an inverse distance weighted interpolation algorithm to perform interpolation operation on an entire mold surface to obtain a mold surface compensation amount distribution; and on the basis of the mold surface compensation amount distribution, correcting the three-dimensional model of the hot-press forming mold to generate a compensated mold processing model. The implementation of the present invention realizes intelligent and automated contour accuracy compensation.

The invention discloses a multi-modal measurement system and method of a three-coordinate measuring machine, relates to the cross technical field of precision measurement, computer vision and intelligent manufacturing, and is used for solving the problems of low automation degree, strong subjective dependence and lack of assembly performance prediction capability in automobile covering part characteristic line detection. According to the method, point cloud data and positioning coordinates are synchronously collected through a multi-mode sensor, and a fusion point cloud sequence is generated through time sequence synchronization; constructing a high-precision three-dimensional point cloud model through noise filtering, registration and curved surface reconstruction; automatically extracting a feature line path based on curvature analysis and generating an analysis section; calculating a sharpness index through contour fitting, and generating a quality evaluation coefficient in combination with a CAD ideal model contour tolerance deviation; and finally, defects are identified through virtual assembly analysis, a sensor remeasurement path instruction is generated, and a quality report is output in combination with a quality coefficient, so that the detection precision, the efficiency and the assembly quality prediction capability in the measurement process of the three-coordinate measuring machine are improved.

The invention discloses a three-coordinate measuring machine, which comprises a first guide rail; the second guide rail is parallel to the first guide rail; the two ends of the cross beam are movably connected with the two guide rails through a first connecting assembly and a second connecting assembly, and at least part of the cross beam is located in the space between the first guide rail and the second guide rail; the driving unit comprises a first driving mechanism and a second driving mechanism which are assembled to the first connecting assembly and the second connecting assembly correspondingly and used for driving the cross beam to move synchronously along the first guide rail and the second guide rail. The sliding frame is movably connected to the cross beam; the Z-axis assembly is assembled on the sliding frame; the gravity centers of the cross beam, the sliding frame and the Z-axis assembly are coplanar with the top faces of the two guide rails. The invention provides a three-coordinate measuring machine, which ensures the operation stability of a cross beam.

The invention provides a three-coordinate measuring machine metering detection method and system, and relates to the field of three-coordinate measurement, and the method comprises the steps: obtaining the geometric model data of a to-be-measured workpiece, and analyzing the geometric model data to determine the local geometric features of the workpiece; according to the method, path information and measuring head attitude information used for measurement are generated according to local geometric features, and based on the path information and the measuring head attitude information, the contact condition of a measuring needle and the surface of the workpiece is simulated, so that the purity and reliability of a data source are remarkably improved, and the measurement data of which abnormal trigger signals are removed are accurately measured. Fine processing is carried out according to local geometric features to eliminate deviation in measurement data, geometric information of key geometric details of the workpiece is maintained, it is ensured that geometric information of key features such as tiny chamfers and sharp edges is not damaged, the accuracy, reliability and efficiency of the three-coordinate measuring machine in measurement and detection of the complex curved surface workpiece are improved, and the measurement precision is improved. The problem that the existing data acquisition efficiency is not high is effectively solved.

Disclosed in the present invention is an error self-calibration method based on a feature component for a parallel coordinate measuring machine. The method comprises: constructing a geometric error model of a parallel mechanism; measuring a feature component by means of a coordinate measuring machine, and then mounting the feature component within the workspace of a parallel coordinate measuring machine; performing data collection on the basis of a sphere‑center‑distance constraint and a sphere‑radius constraint, and correspondingly constructing an error equation based on the sphere‑center‑distance constraint and an error equation based on the sphere‑radius constraint; combining the error equations to obtain an error calibration model based on various feature constraints, using an LM method to identify, correct and substitute kinematic error parameters of the error calibration model, and repeating this process iteratively until kinematic error parameters no longer change, so as to obtain corresponding geometric error parameters of the parallel coordinate measuring machine; and on the basis of the geometric error parameters, compensating for an end pose error in the coordinate measuring machine caused by a geometric error. The present invention greatly improves the motion precision of a parallel coordinate measuring machine.

An articulated coordinate measuring machine comprising a set of sensors, a probe for approaching an object point, and a set of members connecting the probe to a base. The probe is configured to be moved at least partially manually by an operator holding and guiding the probe and / or a handheld member of the set of members. The coordinate measuring machine comprises (i) an accuracy-assessment-functionality providing accuracy-perception-data based on continuously monitored actual data representing an actual state of said at least one state variable of the coordinate measuring machine during the guiding of the probe, and (ii) a user-support-functionality providing a support action during the guiding of the probe based on the accuracy-perception-data.

The invention provides a three-coordinate measuring machine adaptive dynamic error compensation method, and relates to the field of three-coordinate measuring machines, and the method comprises the steps: obtaining multi-source state data of a three-coordinate measuring machine, and calculating a real-time dynamic error, the state data comprising a motion state, a dynamic response and environment disturbance data; based on the real-time dynamic error, using a recurrent neural network to construct a virtual measuring machine model, and performing offline training to obtain an initial error prediction model; and acquiring real-time error feedback data, and performing fine adjustment on the initial error prediction model by using an incremental learning algorithm and a sliding time window mechanism to obtain a prediction model capable of dynamically evolving and aging adaptive parameters. The method is used for overcoming the defect that in the prior art, a linear model or a fixed compensation parameter is difficult to accurately describe and compensate all dynamic errors sometimes.

The invention discloses an articulated coordinate measuring machine error prediction compensation method and system based on a digital twin model. The method comprises the following steps: constructing a real-time synchronous articulated arm digital twinborn model; probability modeling is carried out on a plurality of error sources of the articulated coordinate measuring machine through a Monte Carlo method, and then error statistical characteristics are obtained. And inputting the error statistical characteristics, the joint angle during measurement of the real joint type coordinate measuring machine and the environmental parameters into an error compensation network. And the error compensation network outputs the end position compensation amount of the current coordinate measurement result. According to the method, the digital twinborn model of the articulated coordinate measuring machine is constructed, measurement point distribution is simulated, high-frequency online real-time compensation is realized in cooperation with an error compensation network, the whole process of'measurement-simulation-prediction-compensation 'can be completed through a unified system, and the real-time performance of error compensation is remarkably improved.

Method of operating a measurement system comprising a coordinate measuring machine (200), a configurable tool rack (100) that can accept a plurality of stations (105,106), each station capable of holding a tool (95). In the method, the system measures a workpiece according to a measuring plan that includes tool change operations and measures of the workpiece with different tools available in the rack. The tool change operations are changed automatically based on a set of operational parameters acquired by electronic devices and sensor installed on the tool rack or on the tool stations or on the tools in the rack, or any combination thereof.

The invention relates to an optical measuring arrangement (100) for detecting a distance between a first component and a second component by measuring the length of at least one measuring path (101), wherein the measuring path (101) is spanned between at least two facets (102, 103) forming a measuring head, which are directly or indirectly connected or connectable to the first component, and a measuring target (104) arranged in the measuring path (101), which is directly or indirectly connected or connectable to the second component and is configured to deflect a measuring beam (105) back and forth in the measuring path (101) between the facets, wherein the second facet (103) is formed as a reflecting facet (103). The center of curvature of one of the facets (102, 103) of the measuring head is located on the measuring target (104) or at most 20% of the distance between the facet (102, 103) and the measuring target (104). The invention further relates to a projection exposure system, a lithography system, an inspection system and a coordinate measuring machine.

The invention discloses a three-coordinate measuring machine automatic programming method based on a CAD model and a system optimization system thereof, and belongs to the technical field of intelligent manufacturing and precision detection. According to the method, an off-line programming technology is utilized, and an automatic, efficient and accurate measurement program generation solution is provided through geometric feature recognition, measurement point distribution and path automatic generation. Different from the prior art, under the condition that manual intervention is not needed, the program code meeting the specific measurement standard is automatically generated according to the CAD model of the workpiece and the user requirement, seamless data interaction with the measuring machine can be achieved, the programming efficiency is remarkably improved, and human errors are reduced. In addition, the system has strong adaptability and high operation convenience, and is suitable for automatic measurement programming of various complex parts. The method is innovative, and an automatic solution which is optimized and has a wider application prospect is provided on the basis of the prior art.

The invention relates to the technical field of coordinate measuring machines, and particularly discloses a coordinate measuring machine data correction method and system based on real-time temperature compensation. According to the method, transient fluctuation in measurement data is eliminated through continuous sampling and screening, data steady-state reliability is ensured, then environment temperature is dynamically optimized through comprehensive analysis of a heat source of equipment and external heat radiation, structural thermal inertia and a real-time heat dissipation coefficient are introduced, comprehensive temperature rise is calculated, preliminary linear compensation is performed, and the reliability of the data steady-state is ensured. Basic errors caused by environmental factors are effectively isolated, when preliminary correction data are still out of tolerance, a fine compensation process is triggered, and thermal deformation under complex working conditions is accurately calculated by obtaining temperature distribution of key components and based on a high-fidelity model fusing thermal stress, assembly constraint, material nonlinearity and space-dynamic response, so that the accuracy of thermal deformation is improved. Finally, nonlinear space compensation is realized, and the problems of poor adaptability and insufficient precision can be solved.

The invention discloses a three-coordinate measuring machine based on special-shaped surface measurement. An upper working surface where a working table is located is used for bearing a to-be-measured piece; the measuring mechanism is arranged on the moving portal frame, the moving portal frame is made to move on the workbench, and a to-be-measured piece is measured through the measuring mechanism. A measuring head of the measuring mechanism is arranged at the front end portion where the first movement assembly is located, meanwhile, a first air bag pushing piece is arranged at the rear end portion where the first movement assembly is located, and the first air bag pushing piece is inflated and deflated to be matched with a measuring head piece at the front end portion to synchronously achieve axial pivoting movement. And the second movement assembly is located above the first movement assembly, so that the pivoting movement of the first movement assembly and the second movement assembly drives the measuring head piece to move in the whole space direction, and the full-angle scanning measurement of the to-be-measured piece by the measuring head piece is formed. The whole device can realize high-precision measurement of small-size measurement pieces, and the measurement efficiency is improved.

The invention relates to an optical measuring arrangement (100) for position and / or distance detection of a component relative to a reference along at least one measuring axis, comprising an optical resonator (101) which has at least one coupling mirror (102) for coupling a measuring beam (103) and an end mirror (104) enclosing a resonator cavity (105). The resonator cavity (105) has a length adjustment range, wherein the measuring beam passes through the resonator cavity (105) more than once. The optical resonator (101) has at least one optical element (108) which is configured to control, at least within the length adjustment range (107) of the resonator cavity (105), the beam radius of the measuring beam (103) at the coupling mirror (102) and / or a Gouy phase of the measuring beam (103) propagating in the resonator cavity (105).The invention further relates to a projection exposure system, a lithography system, an inspection system and a coordinate measuring machine.

The embodiment of the utility model provides a closed carriage system applied to a three-coordinate measuring machine, comprising: an X-axis guide seat comprising an X-axis guide cavity enclosed by a main support plate, an outer vertical plate, an upper plate and a lower plate, and a plurality of air bearings provided with air floating end surfaces and arranged at the periphery of the X-axis guide cavity; the Z-axis guide seat comprises a Z-axis guide cavity defined by a Z-axis supporting plate, a Z-axis outer plate, a left side plate and a right side plate, and the extending direction of the Z-axis guide cavity is perpendicular to the extending direction of the X-axis guide cavity; wherein the outer vertical plate comprises a main mounting hole and a main supporting plate, the main supporting plate and the main mounting hole form a mounting space, the air bearing is arranged in the mounting space, a full-coating structure is formed in the X-axis direction and the Z-axis direction, the bearing capacity is large, the precision can be guaranteed at the same time, and meanwhile the bearing capacity is improved. By means of the installation mode, all the air bearings are easy to install and debug, and the installation and debugging process is greatly simplified.

The invention relates to a normal detection method and device, a three-coordinate measuring instrument and a readable storage medium. The method comprises the following steps: determining an initial normal direction of a model surface based on a to-be-measured object model displayed on a screen; determining an observation direction corresponding to the screen, and determining an angle difference value between the observation direction and the initial normal direction; the observation direction is related to a projection coordinate system used by the screen display picture, and the observation direction represents a direction in which a sight line faces the screen; judging whether the initial normal direction is matched with a measurement path or not according to the angle range of the angle difference value; the measurement path is a detection path of a probe of the three-coordinate machine. The method can give consideration to both accuracy and high efficiency.

The application relates to the field of precision instrument measurement technology, and particularly discloses a three-coordinate measuring machine scanning probe, which comprises a top supporting mechanism, an upper connecting mechanism, an XY direction measuring mechanism, a lower connecting mechanism, a Z direction measuring mechanism and a measuring rod mechanism, one set of opposite sides of the XY direction measuring mechanism are connected with the top supporting mechanism through the upper connecting mechanism, another set of opposite sides of the XY direction measuring mechanism are connected with the Z direction measuring mechanism through the lower connecting mechanism, and the measuring rod mechanism is arranged below the Z direction measuring mechanism. The three-coordinate measuring machine scanning probe provided by the application can decompose spatial displacement in three directions, has compact structure, stable movement and high measurement precision, and can realize efficient three-dimensional scanning measurement.

This invention discloses a distributed, off-site measurement module and its implementation method for a coordinate measuring machine (CMM) based on the gLink-II bus, relating to the field of measurement technology. The invention includes: a master station control unit, deployed within the industrial computer of the CMM, serving as the core control node for generating synchronous control commands, configuring operating parameters, parsing and processing grating ruler / encoder data, and interacting with the host computer via a PCIe interface; and a measurement module, deployed on the bed of the CMM's X, Y, Z, and C rotary axes, for acquiring corresponding axis encoder signals, grating ruler signals, GPIO signals, probe signals, and handheld device signals locally, and completing signal preprocessing and data framing. Through a collaborative working mechanism of distributed acquisition, bus synchronization, redundant transmission, and algorithm compensation, this invention achieves localized acquisition, synchronous transmission, and high-precision calibration of four-axis grating ruler / encoder data for the CMM.

The utility model discloses a starting motor stator pole shoe run-out detection device, which belongs to the technical field of rapid detection after starting motor stator processing, and comprises a base and a detection module, the top of the base is provided with a positioning disc and a rotating disc, and the upper end face of the rotating disc is provided with a circular mounting groove; the detection module comprises linear sliding rails, each linear sliding rail is provided with a sliding table and a transmission plate, one end of each transmission plate in the length direction is vertically provided with a measuring rod, and each transmission plate is provided with a measuring device. According to the invention, an expensive three-coordinate measuring machine and a complex clamp design are not needed, the detection cost is greatly reduced, instant detection of stator pole shoe jumping is realized, the tedious process of sending a stator to a detection department in a traditional detection mode is avoided, the detection period is obviously shortened, and the production efficiency is improved.

The invention discloses a tool for detecting the inner diameter and the outer diameter of a stator core. The tool comprises a chuck body and a plurality of chuck blocks. The chuck blocks are arranged along the circumference of the center axis of the chuck body in an array mode, each chuck block is vertically provided with a clamping face facing the center axis of the chuck body, a limiting space for containing a stator iron core is defined by the multiple clamping faces, a torque wrench is vertically arranged on the chuck body, and the torque wrench is arranged in the limiting space. The torque wrench can adjust the pressure value of the plurality of chuck blocks applied to the periphery of the stator core so as to simulate the stress state of the stator core after plastic-coated welding. A method for detecting the inner and outer diameters of a stator core comprises the following steps: placing a detection product; locking torsion on the tool; detecting the inner and outer diameters of the stator core through a three-coordinate measuring instrument; and judging whether the stator core is qualified or not according to measurement data. The device is simple in operation, can rapidly and accurately measure the internal and external diameters of the stator core, and improves the detection efficiency of the internal and external diameters of the stator core.

The time mark-based three-coordinate scanning data synchronous sampling system comprises a three-coordinate measuring machine, a control system, a laser head, a laser head controller and a computer system, the control system and the laser head controller are provided with sampling timers, when scanning measurement is performed, the control system sends sampling pulses to lock the coordinate data of the three-coordinate measuring machine and the time data of the sampling timer of the control system, and simultaneously lock the measurement data of the laser head and the time data of the sampling timer of the laser head controller, the sampling data of the control system and the laser head controller received by the computer system is the coordinate data of the three-coordinate measuring machine, the time data of the control system timer and the measurement data of the laser head and the time data of the laser head controller timer, the computer system selects the data with consistent time data as the scanning measurement data.

The invention belongs to the technical field of electronic-grade high-purity silicon carbide parts, and particularly relates to an electronic-grade high-purity silicon carbide part 3D vision three-coordinate detection method which comprises the following specific steps: S1, preparation before detection: firstly, preprocessing an electronic-grade high-purity silicon carbide part, then carrying out joint calibration on a 3D vision sensor and a three-coordinate measuring machine, and then carrying out coordinate measurement on the electronic-grade high-purity silicon carbide part; then planning a measurement path; s2, data acquisition: scanning the electronic-grade high-purity silicon carbide component by using a 3D visual sensor so as to acquire three-dimensional point cloud data of the electronic-grade high-purity silicon carbide component. Through cooperation of data acquisition and data processing and analysis, structures such as complex curved surfaces, deep holes and tiny features of the silicon carbide part can be comprehensively detected, the problem that a detection blind area is difficult to touch in a traditional method is solved, and it is guaranteed that all key parts of the part can be accurately detected.

A vehicle mount for a portable apparatus for measuring a vehicle frame is configured to be mounted to existing seat mounts (e.g., seat bolt holes) of the vehicle frame. The vehicle mount includes one or more support rails including at least one attachment feature for mounting the vehicle mount to the vehicle frame. The vehicle mount further includes one or more guide rails supported by the support rail(s). The vehicle mount further includes a mounting plate supported by the guide rail(s) and configured to receive a measuring apparatus. The mounting plate can be configurable between an unlocked state, wherein the mounting plate is moveable with respect to the first guide rail and the second guide rail, and a locked state, wherein the mounting plate is locked in position with respect to the first guide rail and the second guide rail.

The utility model relates to the technical field of measuring calipers, in particular to a special caliper for measuring the symmetry degree of a circular mould keyway, which comprises a caliper body, a short clamping foot piece and a long clamping foot piece are arranged on the caliper body in a sliding manner, a fine adjustment assembly is arranged on one side of the short clamping foot piece and is arranged on the outer side of the caliper body in a sliding manner, and a clamping pin is arranged on the long clamping foot piece. The utility model aims to solve the problems that the diameter of a circular mold is large, the weight is heavy, and the circular mold is difficult to move to a three-coordinate measuring machine, and the caliper is light and portable, is convenient to carry, is convenient to carry, and is convenient to use. The device can be directly used on a production line site, does not need to move the ring mold, meets the actual detection requirements of the production site, and reduces the detection cost and the operation complexity.

This invention discloses an ellipticity standard component and measurement method for measuring the quality of duct bending deformation. The standard component includes several grooves cut from top to bottom on the surface of a cylindrical body. The cross-sections at the groove locations are elliptical, and the ellipticity of each elliptical cross-section is unequal. Each elliptical cross-section and the groove wall along the central axis constitute several elliptical cylinder standard components. A coordinate measuring machine (CMM) is used to calibrate the standard component: First, coordinate points are collected on the outer cylindrical surface of the standard component, and the central axis is fitted to obtain it. Then, coordinate points are collected on the elliptical cylinder surface of the standard component and projected onto a plane with the central axis as the normal vector, and the geometric parameters of the elliptical cylinder are fitted to obtain it. Finally, the ellipticity corresponding to each elliptical cylinder is calculated, completing the fabrication of the ellipticity standard component. This invention establishes a standard for the detection and evaluation of ellipticity after duct bending deformation and proposes a method for measuring ellipticity using a coordinate measuring machine, which has good versatility and high accuracy.

This invention discloses a coordinate measuring machine for measuring the mass characteristics of spacecraft, comprising a translation mechanism, a pitch mechanism, and a rotation mechanism. A control cabinet is mounted on one side of the mounting base connected to the coordinate measuring machine's adapter plate. The fixed frame of the translation mechanism is hinged to the pitch mechanism, and the rotation mechanism is hinged to the middle of the pitch mechanism. This invention provides a coordinate measuring machine for measuring the mass characteristics of spacecraft with the above structure. It is simple to operate; the spacecraft can be positioned and installed on the coordinate measuring machine once, and all mass characteristic parameters can be measured with high accuracy.

A kind of three-coordinate measurement probe based on negative feedback regulation and measurement method, belong to precision measurement technical field.The present application solves the problems of poor precision and complex calibration process of three-coordinate measuring machine for measuring rigid object profile in prior art.The present application includes probe assembly, optical measurement system and elastic control module, the probe assembly includes first fixed plate and probe fixed on the bottom end of first fixed plate, the optical measurement system includes mirror frame fixed on the top surface of first fixed plate, reflecting mirror horizontally installed on the top of mirror frame, first refracting mirror and second refracting mirror vertically installed below mirror frame and distributed perpendicular to each other, laser interferometer arranged above reflecting mirror, first laser and first photosensitive position sensor distributed on both sides of first refracting mirror, and second laser and second photosensitive position sensor distributed on both sides of second refracting mirror, the elastic control module includes second fixed plate and a plurality of elastic columns.The present application is used for object profile measurement.

This application relates to a high-precision motion control system and method for a coordinate measuring machine (CMM). The high-precision motion control system includes: a control handle for generating a corresponding target control signal in response to control operations; a motion controller communicatively connected to the control handle and the CMM; the motion controller receives the target control signal, queries a preset control curve based on the target control signal, determines the speed control coefficient corresponding to the target control signal, generates a target control command for controlling the probe based on the speed control coefficient, and sends the target control command to the CMM; wherein the target control command controls the movement direction and speed of the probe for measuring the workpiece. This solves the problems of low efficiency and poor accuracy caused by inflexible speed control in manual operation, improves the flexibility and accuracy of speed control in manual operation of the CMM, thereby enhancing measurement efficiency and reliability.

The invention discloses a part group hole inclination angle batch measurement method, and belongs to the technical field of measurement. Comprising the steps that two cameras are adopted to be matched with a set of laser range finders respectively, the optical axis directions of the two cameras are perpendicular to the front surface and the back surface of a to-be-measured part, and the cameras and the laser range finders are calibrated; respectively acquiring part images by adopting a camera, and respectively acquiring coordinate sets of hole center points in the two images under a global coordinate system; extracting part surface hole center coordinates to form a first point cloud; combining coordinate sets of hole center points in the two images under the global coordinate system to form a second point cloud; and according to the relationship between the center coordinates of the two holes corresponding to the same hole in the first point cloud, extracting the coordinates of the two points corresponding to the same hole in the second point cloud, calculating the distance value between the two points, and deducing a hole inclination angle calculation formula according to the geometrical relationship. According to the invention, non-contact group hole batch measurement can be realized, and compared with a three-coordinate measuring machine contact type hole-by-hole measurement mode, the method has the advantage of high measurement efficiency.

The invention discloses a contact type three-dimensional scanning probe with a mechanical self-decoupling function, which is composed of an XY-direction sensing module and a Z-direction sensing module, adopts a spherical hinge type mechanical self-decoupling structure, and realizes separation of Z-direction and XY-direction displacement paths by taking a central rotating ball in a fixed fisheye joint rod as a spherical hinge center; an XY-direction reed is arranged to be of an inner and outer ring structure, and the XY-direction reed and the center of the center rotating ball are located on the same plane; when a probe in the Z-direction sensing module moves along an X direction or a Y direction, an inner ring in an XY-direction reed deflects around a sphere center, a sensor in a corresponding direction outputs a strain signal, and meanwhile, a sensor in an orthogonal direction only slightly rotates along with a structure and does not generate effective output, so that mechanical decoupling of X-direction measurement and Y-direction measurement is realized, and a coupling error in a plane is reduced. The device is compact in structure, simple and convenient to assemble, high in sensitivity, low in coupling error and excellent in stability, and is suitable for high-precision contact measurement in a three-coordinate measuring machine and a micro-nano three-dimensional shape detection system.