61 results about "Laser measurement system" patented technology

The invention discloses a laser measurement system suitable for a large complex curved surface and a measurement method thereof.The measurement system comprises a control module, a positioning module, a pre-scanning module and a high-precision scanning module, and the control module comprises a high-precision scanning planning unit and a scanning analysis unit; the high-precision scanning module comprises a three-dimensional scanning platform, a universal mechanical arm and a distance measuring laser; the measurement method comprises the steps of pre-scanning to generate an initial model, scanning path planning and scanning attitude control, high-precision scanning to collect point cloud data, preprocessing and marking of the high-precision scanning point cloud data, local optimization and supplementary scanning strategy generation and high-precision scanning model generation. According to the measurement system and method, the dynamic scanning path of the high-precision scanning module is intelligently planned based on the pre-scanning result, the pre-scanning and high-precision scanning strategies are combined, high-density coverage and uniform sampling of the large complex curved surface are achieved, measurement is accurate, the anti-interference capacity is high, and the model scanning precision is high; a dynamic supplementary scanning mechanism is automatically marked and triggered in the scanning process, and the quality of scanned data is ensured.

The invention relates to a robot grinding and polishing self-adaptive compensation method based on multi-line laser, and relates to the field of robot positioning precision. According to the technical scheme, online high-resolution measurement of the workpiece is achieved through the multi-line laser scanning sensor, hand-eye parameters are dynamically updated in combination with multi-view calibration and data fusion, the tail end pose of the robot is corrected in real time through the mixed error model fusing MDH kinematics and machine learning, and the grinding and polishing precision and consistency are guaranteed. Wherein the MDH model is responsible for coarse positioning to guarantee interpretability of a kinematic structure, the machine learning model captures nonlinear dynamic errors such as thermal expansion and abrasion, and the MDH model and the machine learning model are combined to achieve self-adaptive real-time compensation of a complex error source. The error compensation precision is improved from the millimeter level to the submillimeter level, the cost of the line laser measurement system is only tens of thousands of yuan, the size is small, installation is easy, and compared with a laser tracker, the cost and the installation difficulty are greatly reduced.

The invention discloses a laser measurement system for the size of a rubber sealing element, and relates to the technical field of laser measurement of the size of the rubber sealing element, and the laser measurement system for the size of the rubber sealing element comprises a fixed seat, a cylinder is fixed at the top of the fixed seat, and a mounting frame is fixed at the output end of the bottom of the cylinder. And a laser measuring head is detachably mounted in the mounting frame. According to the laser measurement system for the size of the rubber sealing element, when the size of a rubber sealing ring needs to be measured, the rubber sealing ring sleeves a connecting sleeve, a mounting frame is driven to move downwards by starting an air cylinder, and a positioning sleeve can be moved out of the connecting sleeve through cooperation of a round block, a rotating shaft, a connecting spring, a hinge rod and a moving block; therefore, the inner side of the rubber sealing ring is extruded, the bent rubber sealing ring can be supported, and the problem that the measurement data of the laser measuring head is inaccurate due to the fact that the rubber sealing ring is in a bent state is solved.

The invention provides a steel plate shape measurement and calibration method, belongs to the field of three-dimensional shape measurement and calibration, and aims to realize three-dimensional reconstruction and shape measurement of the surface of a steel plate. In order to realize high-precision detection of the shape of the steel plate, X, Y and Z coordinate data of the surface of the steel plate are obtained through a double-line laser measurement system. The measurement system is composed of a plurality of cameras and two line lasers, and the installation positions of the cameras are determined to ensure that a certain overlapping view exists between the cameras, so that data splicing is realized. In the measuring process, an image shot by the camera is processed, position information of laser rays in the image is extracted, pixel coordinates are converted into actual world coordinates according to calibration parameters and the working distance of the camera, and X, Y and Z three-dimensional coordinate data of the surface of the steel plate are obtained. And vibration compensation is carried out in the measurement process, so that the accuracy and the stability of a measurement result are ensured.

The high-density board intelligent processing system comprises an intelligent suspension conveying rail, one end of the intelligent suspension conveying rail is provided with a feeding conveying rail, the other end of the intelligent suspension conveying rail is provided with a qualified discharging conveying rail, and the middle section of the intelligent suspension conveying rail is provided with a processing conveying rail and a classified discharging conveying rail; a plurality of machining conveying rails are arranged, a machining station is arranged below each machining conveying rail, an image collecting system and a laser measuring system are arranged on each machining station, a hanging trolley is arranged on the intelligent hanging conveying rail, and a telescopic cantilever device is arranged at the lower end of the hanging trolley. A high-density board is clamped on the telescopic cantilever device, the telescopic cantilever device drives the high-density board to be machined and detected in the longitudinal direction and the circumferential direction, and the hanging trolley drives the high-density board to be conveyed transversely. The device has the advantages of intelligent suspension conveying of the high-density boards, multi-station continuous double-sided defect detection, measurement and calibration, and classified conveying according to calibration results.

The invention discloses a laser measurement system building method for ultra-large aviation process equipment, which comprises the following steps of: designing a measurement field, setting a system building point position of the measurement field, and determining a measurement station of a laser tracker; measuring and recording temperature data of each building point in the measurement field; measuring the space coordinates of all the system building points in the measuring field; performing iteration judgment of out-of-tolerance data on the space coordinates of the building points at the measurement stations of the laser tracker so as to eliminate the building points with out-of-tolerance space coordinates; performing spatial networking on all the system building points in the measurement field, and determining the relative spatial relationship of all the system building points; and establishing a coordinate system based on the relative spatial relationship of all the system establishment points in the measurement field. According to the technical scheme provided by the invention, the problem that in a reference point measurement mode of ultra-large aviation process equipment, due to measurement errors and temperature factors of measurement equipment, the precision of a measurement field formed by station transfer matching of measured data and theoretical data of the reference point is reduced, and the assembly measurement requirement cannot be met is solved.

The invention discloses a robot in-situ line laser measurement system and a calibration method, a six-degree-of-freedom robot is adopted to carry a line laser sensor, a human-computer interaction interface is developed, and the measurement efficiency and reliability are improved; besides, in order to improve the measurement precision, a neural network optimized by an intelligent algorithm is adopted to compensate the positioning error of the tail end of the robot, a calibration model is constructed by measuring a standard cylinder, and solving is carried out through a penalty function method, so that the measurement attitude of the laser sensor is obtained, and the three-dimensional coordinates of a measurement point are analyzed. According to the invention, the measurement efficiency can be improved, and the measurement precision and reliability can be ensured, so that the adaptive capacity for the measurement requirements of aerospace large complex components is enhanced.

The invention relates to the technical field of precision optical measurement, in particular to an online laser measurement system and method for six-degree-of-freedom motion errors of a linear workbench, and the measurement system comprises a laser emission unit, a laser beam splitting error compensation unit, a fixing module and a motion module which are sequentially arranged. According to the online laser measurement system for the six-degree-of-freedom kinematic error of the linear workbench, full modular design is carried out, and the online laser measurement system is suitable for being systematically integrated with a to-be-measured target so as to adapt to application in various industrial environments; through multi-beam path design and sensitivity analysis, effective compensation can be carried out for beam drift and installation errors, and the accuracy and reliability of measurement are improved; a mapping model between a detection result image and a light beam target image is constructed by utilizing machine learning, so that the beam splitting precision of a laser beam can be fully improved, the measurement deviation caused by an optical path and an equipment error can be reduced, and the aim of fully improving the motion error measurement effect of the linear workbench is fulfilled.

The invention discloses an FMCW laser measurement system light source nonlinear correction method based on physical mapping modeling and a TD3 algorithm, and belongs to the fields of laser radar, laser measurement, artificial intelligence and the like. An FMCW laser measurement system is usually limited by the nonlinear characteristic of a tunable laser, especially the bandwidth is increased under triangular wave modulation, a traditional correction method is difficult to achieve a good effect, and the measurement precision and quality are affected. The invention provides an innovative correction method combining a physical mapping model and a TD3 algorithm, and provides an effective compensation mechanism for nonlinear errors of an FMCW laser measurement system under triangular wave modulation. Comprising the following steps that an FMCW laser measurement system is designed and built, PD measurement data are utilized, data preprocessing is carried out, and a data set is built; fitting nonlinear characteristics of the system by using a physical mapping relation; nonlinear correction is realized based on TD3 algorithm control; the nonlinear correction method optimizes the performance of the FMCW laser measurement system through combined application of physical mapping modeling and an RL control strategy.

The invention relates to a vibration suppression method of a high-precision hardware part continuous punching machine in the field of intelligent manufacturing equipment industry in high-end equipment manufacturing industry, which comprises the following steps of: identifying a main vibration frequency and a secondary vibration frequency by adopting a peak detection algorithm according to vibration spectrum distribution, and determining a key frequency point set of multi-band vibration; through a pre-established vibration mode and damping parameter mapping model, for the dominant frequency vibration feature vector, a table look-up method is adopted to obtain a corresponding initial damping parameter combination, and a preliminary damping adjustment scheme is determined; the optimized damping parameter combination is adopted, the rigidity and the damping coefficient of a damping device are dynamically adjusted through a servo control system, multi-frequency-band vibration is restrained, and stable stamping process data are obtained; geometric dimension data of the suspender and the check claw are collected in real time through a laser measurement system, the dimensional deviation trend is analyzed through a statistical process control algorithm, and the stability of the stamping process is judged.

One example provides a laser measurement system comprising an alignment artifact attached to a global reference frame. The alignment artifact has features that define corresponding reference points. A controller is configured to obtain metadata comprising expected locations of the corresponding reference points for the features within a target view during a scan. The controller is also configured to obtain a raw point cloud of the alignment artifact within a scanner reference frame. The controller is further configured to determine scanned features from the raw point cloud, and locations of corresponding scanned reference points to form a set of scanned locations. The controller is also configured to determine a transformation matrix to transform coordinates between the scanner reference frame and the global reference frame based at least upon the set of expected locations, the set of scanned locations, and a common direction vector for a plurality of laser line scanners.

The invention relates to the technical field of laser measurement, in particular to a pivot base multi-dimensional error detection device based on laser scanning, which comprises a laser measurement device and an intermittent annular conveying device, a plurality of tooling plates are arranged on the intermittent annular conveying device, a driving assembly is arranged on the intermittent annular conveying device, and the driving assembly is connected with the laser measurement device. A mounting box is arranged on the tool plate, and an angle conversion assembly and a rotating assembly are arranged in the mounting box; through organic cooperation of three core mechanisms of transmission and driving time sequence cooperation, rotation and revolution mode switching and layered elastic driving, key problems of multi-degree-of-freedom cooperative control, single ball head motion function, driving failure in an inclined state and the like of an existing laser measurement system are effectively solved. And the completeness of workpiece three-dimensional form and position error detection is obviously improved.

The invention discloses a double-color-based multi-line laser measurement system and method, which are characterized in that the color of projected line laser is coded to ensure that only line laser strips with specified colors are contained in a certain pixel interval, and the double-color separation of the same frame of RGB image is realized by combining Raw data and a Bayer filter array to realize the distinguishing between the line laser strips; the height information of the to-be-measured object at each pixel point is demodulated and reconstructed according to the relative position relation between the camera and the laser strip, single-line laser is replaced by multi-line laser, the efficiency of the measurement system is higher, and the measurement depth can be remarkably enlarged according to a two-color coding mode.

The present invention provides a method for calibrating the external parameters of the IMU of a laser SLAM measurement system, which utilizes a high-precision scanner: by using a high-precision stand-type three-dimensional laser scanner with tilt correction to scan a specific site, high-precision point cloud data C0 can be obtained. This high-precision reference benchmark point cloud provides accurate basic data for the subsequent calibration process, which helps to improve the accuracy of the calibration. Static acquisition method: data is collected by locking the SLAM system device on a tripod for static scanning. Unlike the prior art in which the point cloud coordinates may be affected by motion distortion due to device movement (such as the operator shaking the device), this static acquisition method fundamentally avoids the distortion problem caused by motion, so that the collected data can more accurately reflect the actual geometric relationship, thereby improving the accuracy of the calibration.

The application provides a steel plate shape measurement calibration method, belongs to the field of three-dimensional shape measurement and calibration, and aims to realize three-dimensional reconstruction and shape measurement of a steel plate surface. In order to realize high-precision detection of the plate shape, the application obtains X, Y and Z coordinate data of the steel plate surface through a double-line laser measurement system. The measurement system is composed of multiple cameras and two line lasers, the installation positions of the cameras are determined to ensure that the cameras have a certain overlapping field of view, so that the data can be spliced. In the measurement process, the image captured by the camera is processed, the position information of the laser line in the image is extracted, the pixel coordinates are converted into actual world coordinates according to the calibration parameters and the working distance of the camera, and the X, Y and Z three-dimensional coordinate data of the steel plate surface are obtained. Vibration compensation is carried out in the measurement process to ensure the accuracy and stability of the measurement result.

The invention discloses a laser measurement system for the size of a rubber sealing element, and relates to the technical field of laser measurement, and the system comprises a signal collection module S11 which is used for obtaining distance measurement signal data collected by a laser distance measurement device in a continuous measurement process on the surface of the rubber sealing element, the ranging signal data comprises a scanning angle, laser emission time, laser echo receiving time and laser echo intensity; the stable screening module S12 is used for extracting signal segments with continuous angles and emission time intervals lower than a preset interval value according to scanning angles and laser emission time in the ranging signal data, and marking the signal segments as stable scanning segments; according to the method, through synchronous acquisition of distance measurement signal data, stable screening of credible signal fragments and high-precision fitting of radial dimension data, accurate reconstruction of the target contour dimension of the rubber sealing element and improvement of dimension consistency judgment capability are realized.

A compact inspection assembly comprising digital sensors and / or laser measurement systems to measure and validate attributes of pipe and associated threaded connections. A custom designed end-effector sensor assembly is selectively attached to a robotic arm having software and control systems. An automated sensor assembly, selectively positioned relative to a pipe section, measures data regarding the pipe and associated threaded connections. The measured and recorded data can be inspected for defects and / or compared to predetermined standards (such as, for example, original equipment manufacturer and / or end user specifications or requirements) to verify pipe / connection compliance with desired standards.

The invention discloses a self-supervised laser speckle denoising method based on a transform domain, and relates to the field of laser measurement. Laser speckle noise is modeled into a Poisson-Gaussian mixture model, statistical characteristics of the laser speckle noise are represented, and efficient training of a denoising model is realized on the premise that a clean image does not need to be labeled by adopting a parameter estimation network fusing a residual attention strategy with a U-Net architecture and a self-supervised denoising network containing an asymmetric convolution Inception structure. A mixed noise domain is converted into a Gaussian noise domain through generalized Ansu transform, multi-loss function optimization is combined, the algorithm denoising performance is improved, the peak signal-to-noise ratio of a light spot image is remarkably improved, and then the precision of a laser measurement system is improved. The method is simple and efficient, adapts to different laser measurement devices, can effectively improve the measurement precision in the fields of laser radar, industrial detection, medical imaging and the like, and provides core technical support for the industries of intelligent manufacturing, automatic driving and the like.

This application relates to the field of rail straightening equipment, and provides an intelligent rail weld straightening machine, including a machine frame, a laser measurement system, and a straightening force application system. The laser measurement system includes a horizontally sliding walking unit. The straightening force application system includes a first vertical force application mechanism located on the moving path of the walking unit. The first vertical force application mechanism includes a first hydraulic cylinder and a force application column. The first hydraulic cylinder is fixed to an upper moving platform, and the force application column is rotatably connected to the movable end of the first hydraulic cylinder via a rotating mechanism. A swing block is provided on the outer side of the rotating mechanism, and a limiting protrusion is provided on the free end of the swing block. A limiting groove is provided on the outer side of the force application column to fit into the limiting protrusion. When the force application column is in an upward rotating state, the limiting protrusion is matched and locked inside the limiting groove. Based on this, the possibility of collision between the force application column and the walking unit can be reduced in the event of an unexpected power outage, and the possibility of positional displacement or even damage to the walking unit can be reduced.

The invention discloses a wafer-level laser measurement system, and relates to the technical field of wafer-level testing. The movable carrying table, the beam shaping system and the like are used for selectively carrying out polarization testing or changing the beam diameter to enable the beam diameter to be smaller than the clear aperture of a conventional small optical element, the rapid switching function from the polarization testing to the non-polarization testing is achieved, and therefore the purposes of reducing the weight and cost are achieved, the high-risk behavior of disassembling and assembling a machine table is reduced, and the working efficiency is improved. The size of an existing equipment optical element is reduced by two times, the weight is reduced by four times, and the function switching time is shortened from 4-6 hours in the prior art to current 1 min.

This invention relates to the technical field of precision chip measurement, specifically a laser measurement system and method for the gap between a chip transfer carrier and a substrate. The system includes a laser emitter, a transmission / reflection separation module, a displacement stage, and an imaging screen. In the laser measurement system for the gap between the chip transfer carrier and the substrate, the displacement stage is spaced between the transfer carrier and the receiving substrate. A first light beam and a second light beam are reflected and refracted and then reflected again by the transfer carrier and the receiving substrate, respectively. This results in multiple light spots being formed on the imaging screen by the first and second light beams. Furthermore, when the transfer carrier deflects or moves relative to the receiving substrate, the positions of the multiple light spots on the imaging screen change after reflection and refraction by the transfer carrier and the receiving substrate. The imaging screen measures the distance values ​​of each light spot after the change, thereby improving the accuracy of the gap measurement between the chip transfer carrier and the receiving substrate.

The invention belongs to the field of nuclear power station on-site maintenance, and particularly relates to a nuclear reactor pressure vessel cylinder sealing surface high-precision detection device which comprises a vehicle frame, a vehicle driving mechanism, a video inspection system, a laser measurement system and an electric control system. The vehicle frame is used for installing the detection device on the to-be-detected sealing surface body; the vehicle driving mechanism is connected with the vehicle frame and used for driving the detection device to operate along the measuring guide rail. The video inspection system is mounted on the vehicle frame and is used for shooting and inspecting the sealing surface; the laser measuring system is mounted on the vehicle frame and used for scanning and measuring the sealing surface; and the electric control system is connected with the vehicle driving mechanism, the video inspection system and the laser measurement system and is used for controlling all automatic and manual operations of the detection device. The device provided by the invention can perform automatic inspection and defect measurement on the sealing surface of the nuclear reactor pressure vessel cylinder, realizes remote control equipment inspection and measurement of the sealing surface, and is stable in operation and accurate in positioning.

The present disclosure provides a laser measurement system and method, which is applied to the field of microwave photon technology. The system comprises an antenna, a microwave source, a laser, a polarization controller, a double parallel Mach-Zehnder modulator, an electrical coupler, a photoelectric detector and a signal processing module. The antenna is used to receive a return signal, the microwave source is used to emit a reference signal, the polarization controller controls the polarization direction of the optical carrier emitted by the laser, the return signal and the reference signal are modulated onto the optical carrier with the controlled polarization direction through the double parallel Mach-Zehnder modulator, and a modulated optical signal is output, the modulated optical signal enters the signal processing module after frequency mixing processing by the photoelectric detector, and the signal processing module outputs a final result to obtain the measurement results of Doppler shift and angle of arrival at the same time. The present disclosure can realize the simultaneous measurement of Doppler shift and angle of arrival, determine the direction of Doppler shift, and is not limited by electromagnetic interference and working bandwidth, and has a very large working bandwidth.

A compact inspection assembly comprising digital sensors and / or laser measurement systems to measure and validate attributes of pipe and associated threaded connections. A custom designed end-effector sensor assembly is selectively attached to a robotic arm having software and control systems. An automated sensor assembly, selectively positioned relative to a pipe section, measures data regarding the pipe and associated threaded connections. The measured and recorded data can be inspected for defects and / or compared to predetermined standards (such as, for example, original equipment manufacturer and / or end user specifications or requirements) to verify pipe / connection compliance with desired standards.

This invention provides a laser measurement system for geological profile thickness, relating to the field of laser measurement technology. It includes a support assembly, a measurement assembly, and a connecting assembly. The support assembly includes an upper support and a lower support. The upper support is rotatably connected to a frame, which has symmetrical perforations. The lower support is rotatably connected to a lower plate. The connecting assembly includes a square shaft, which is connected to the frame by bearings. The square shaft passes through square holes on the central shafts of two rollers. One end of each of two steel wire ropes is connected to the central shaft of the corresponding roller. The two steel wire ropes are wound around the central shafts of their respective rollers and pass through the corresponding perforations. This invention addresses the shortcomings of existing technologies by developing a laser measurement system for geological profile thickness. This invention utilizes a round-headed rod to clamp the steel wire ropes, keeping the lifting plate perpendicular to the steel wire ropes, allowing the laser rangefinder to measure the rangefinder plate perpendicularly, resulting in more accurate measurements.

The invention discloses a motor shaft laser measurement method and laser measurement system capable of preventing current electrolytic corrosion, and belongs to the technical field of laser measurement. The detection method comprises the following steps: S01, fixing a to-be-detected motor shaft in a first posture; s02, scanning the motor shaft by adopting a laser sensor to obtain first measurement data, and sending the first measurement data to a data processing device; s03, fixing the motor shaft to be detected in a second posture; s04, scanning the motor shaft by adopting a laser sensor to obtain second measurement data, and sending the second measurement data to a data processing device; and S05, weighting the first measurement data and the second measurement data to obtain third data, comparing the third data with a preset value, and judging whether the size of the motor shaft is qualified or not. According to the detection method, size measurement is carried out on the two junctions of the annular groove of the motor shaft and the main shaft under the better detection condition, and the detection accuracy is improved through measurement data fusion processing.

The invention provides a section thickness laser measurement system for geological survey, which relates to the technical field of laser measurement and comprises a support assembly, a measurement assembly and a connection assembly. The support assembly comprises an upper support and a lower support, the upper support is rotationally connected with a frame, symmetrical penetrating holes are formed in the frame, and the lower support is rotationally connected with a lower square plate. The connecting assembly comprises a square shaft, a square shaft bearing is connected with the frame, the square shaft penetrates through square holes in center shafts of the two wire rollers, one ends of two steel wire ropes are connected with the center shafts of the corresponding wire rollers respectively, and the two steel wire ropes are wound around the center shafts of the corresponding wire rollers respectively. The two steel wire ropes penetrate through the corresponding penetrating holes respectively. Aiming at the defects in the prior art, the section thickness laser measurement system for geological survey is developed, the steel wire rope is clamped by the round head rod, the lifting plate is kept vertical to the steel wire rope, the laser range finder vertically measures the range finding plate, and the measurement is more accurate.

The invention relates to the technical field of machine vision measurement, in particular to a laser triangulation method and a sensor calibration structure. The optical axis of the imaging lens is located on the side, closest to the laser line, of the plate-level camera. According to the invention, the defect of lack of a universal high-precision laser measurement system in the prior art is overcome, the measurement performance of the sensor can be greatly developed under the same hardware condition, the nonlinear error of the sensor can be lower, and the measurement result of the sensor is more stable.

The present invention relates to the field of machine vision measurement technology, and in particular to a laser triangulation method and sensor calibration structure. The optical axis of the imaging lens is positioned on the side of the board-level camera closest to the laser line. This overcomes the aforementioned shortcomings of the prior art, which lack universal, high-precision laser measurement systems. This method significantly improves the sensor's measurement performance under the same hardware conditions, reduces the sensor's nonlinear error, and provides more stable measurement results.

The invention provides a manual steering 21 geometric error laser measurement system and method, the system comprises a measurement unit, a light steering unit and a geometric error sensing unit, the light steering unit comprises a positioning device and a steering mirror, and the positioning device is used for positioning the steering mirror; the geometric error sensing unit comprises a first shell, a first connector, a second connector, a precise angle adjusting device, a coarse adjusting device and a fixing device; the measuring unit and the positioning device are respectively installed on a machine tool platform, and the geometric error sensing unit is installed beside a machine tool spindle through the first connector or the second connector, the precise angle adjusting device, the coarse adjusting device and the fixing device and does not rotate along with the machine tool spindle. The measuring unit and the geometric error sensing unit are mutually combined to measure X-axis, Y-axis and Z-axis six-degree-of-freedom errors and three-axis perpendicularity errors. According to the invention, the problems of high manufacturing difficulty, high cost, low measurement precision and the like of equipment adopted by an existing measurement system can be solved.