26 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 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.

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 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.

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.

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.

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 application discloses a laser measuring system and a measuring method for ring piece machining length measurement, and belongs to the technical field of size detection. The laser measuring system and the measuring method for ring piece machining length measurement comprise a base, the upper end of the base is provided with a pressing plate, and a second movable hole with a second detection arm is longitudinally arranged in the base. The application solves the problems of the existing stone honeycomb board, such as large occupied area, difficult equipment placement and poor fluidity. After the second hydraulic telescopic rod is elongated to push, the second detection arm can simultaneously drive the second clamping piece and the first abutting roller to move towards the ring piece until the second pressure sensor detects the pressure and gives a signal of stopping contraction to the second hydraulic telescopic rod. The single-position second laser measuring instrument respectively irradiates on the second clamping piece and the rotatable shielding piece to directly detect the inner diameter and the outer diameter of the ring piece.

The invention provides a large-diameter multi-type pipeline aligning method and tool, and belongs to the technical field of pipeline construction.A laser measurement system is established to collect pipeline axis deviation data in real time, and the optimal adjustment amount of each clamping point is calculated based on a multi-point coordination control algorithm and a double-layer game optimization model; the two-way lead screw nut transmission system is used for driving the four clamping V-shaped blocks to conduct multi-point synchronous clamping and positioning on the bottom and the end opening of the pipeline, the rear jacking mechanism is matched to prevent axial displacement, and the position of each clamping mechanism is dynamically adjusted through the real-time feedback control system according to the measurement result to achieve automatic centering of the axis of the pipeline. The traditional artificial experience adjustment is converted into an accurate control process based on mathematical optimization, and the technical problems that the alignment precision of various large-diameter pipelines is difficult to guarantee, and the adjustment process is complex and low in efficiency are solved.

1. Name of the product in this design: Receiver. 2. Application of this design: A handheld GNSS receiver integrating a laser measurement system, an inertial navigation system, an image measurement system, and a global satellite navigation and positioning system for engineering surveying and other purposes. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses an adjusting device and method of a laser interferometer, and provides a hardware solution for automatic adjustment of the laser interferometer by designing a laser interferometer mounting and adjusting mechanism, combining a manual adjusting mechanism and an automatic adjusting mechanism, and detecting a laser light path through a combined first PSD position sensor and a second PSD position sensor to realize quick mounting and calibration between the laser interferometer and an interference mirror. The best direction vector of outgoing light of the laser interferometer in space is solved through least square fitting analysis on the results of multi-point position detection, so that the system error of the laser measuring system itself is eliminated, and the influence of Abbe error and cosine error on the laser measuring system is reduced.

The invention relates to the technical field of retainer correction, in particular to a large retainer automatic correction device which specifically comprises a correction platform, a plurality of sets of supporting assemblies capable of sliding in the radial direction are evenly arranged on the top face of the correction platform in the circumferential direction, and the multiple sets of supporting assemblies can be driven to synchronously expand outwards or retract inwards. Each supporting assembly is detachably provided with an adjusting assembly, the adjusting assemblies are used for abutting against the inner wall of the retainer when the multiple supporting assemblies synchronously expand outwards so as to radially correct the retainer, laser measuring systems are evenly distributed in the circumferential direction of the correction platform, the laser measuring systems scan the retainer, and the laser measuring systems are used for measuring the position of the retainer. Data of the retainer are collected in real time and sent to the control system, the control system processes the data of the retainer and drives the multiple sets of supporting assemblies to expand outwards in the radial direction through the driving device, and synchronous pressure applying and deformation compensation are conducted on the retainer. The problems that an existing correcting device is tedious in die changing and difficult to adapt to retainers of different specifications are solved.

The line laser gear measurement sensor space pose optimization method of the application comprises: generating tooth surface sampling points and tooth surface unit normal vectors in a gear coordinate system; transforming the tooth surface sampling points and tooth surface unit normal vectors to a line laser coordinate system; establishing an effective field of view model of the line laser sensor in the line laser coordinate system; selecting effective sampling points from the tooth surface sampling points in the line laser coordinate system that meet the preset measurement feasible conditions; calculating the included angle between the measurement direction and the tooth surface unit normal vector corresponding to the effective sampling points; constructing a space pose evaluation cost function; iteratively optimizing the candidate space pose parameter group within the preset parameter range to obtain the optimal sensor space pose parameter group; and determining the space pose parameter range of the line laser sensor. The application can determine the space pose parameter range of the line laser sensor according to the key geometric parameters of the gear and the line laser measurement system parameters, so as to improve the measurement quality, measurement stability and measurement efficiency.

The invention discloses a six-degree-of-freedom laser measurement system, and belongs to the technical field of precision measurement. Comprising a laser light source, a collimating and beam expanding lens, three beam splitting prisms, a reflector, a cross-shaped circular ring reflection target, two focusing lenses, three CCD cameras and a telecentric lens, according to different measured degrees of freedom, the optical system is divided into a first optical system, a second optical system and a third optical system, the first optical system realizes Z-axis direction displacement measurement of a measured object by using an oblique laser triangulation principle, and the second optical system realizes rotation angle measurement of the measured object in X-axis and Y-axis directions by using an auto-collimation measurement principle. The third optical system measures the displacement of the measured object in the X-axis and Y-axis directions and the rotation angle of the measured object in the Z-axis direction according to the vision imaging measurement principle; an optical path multiplexing mechanism is adopted, the number of elements is remarkably reduced, and miniaturization, integration and low cost of the system are achieved; and the six degrees of freedom are independently measured, so that the coupling relationship among the degrees of freedom is avoided.

The invention provides an infinitesimal body three-dimensional dynamic deformation measuring device and method for a dynamic true triaxial system. A loading device is used for dynamically loading a sample, and two laser measurement systems are arranged in the axial direction without loading. The method comprises the following steps: step 1, a loading and measurement process and measurement data description; and step 2, proposing a calculation method for an X-axis dynamic out-of-plane deformation value based on a measurement scheme of double-sided eight-point symmetric arrangement. The invention provides a new accurate measurement paradigm under a dynamic loading condition, interference of absolute displacement is eliminated through a mathematical principle by means of laser Doppler microsecond-level dynamic response and nano-level precision and in combination with symmetrical measuring point layout, a technical path of dynamic deformation measurement under complex dynamic disturbance is reconstructed from a principle level, and the measurement accuracy is improved. And the three-dimensional dynamic deformation measurement of the infinitesimal body under dynamic true triaxial loading is realized.

The invention discloses a laser measurement system for the clearance height of a sailing ship, and relates to the field of laser measurement, and the system comprises the steps: dynamically transmitting a laser beam with adjustable frequency and density to the upper part of the ship through a laser transmitting module; the laser receiving module captures a reflection signal and converts the reflection signal into a digital signal; in combination with the real-time position and track provided by the dual-mode positioning module and the ship attitude data measured by the attitude sensing module in real time, the data processing module performs attitude compensation correction on the laser measurement value; the environment monitoring module provides environment parameters for laser propagation speed correction. The processing module integrates all data to calculate a real-time clearance height, the real-time clearance height is displayed by the display early warning module in real time, and a graded sound-light alarm is triggered when the height is lower than a preset safety threshold value; and all data are encrypted and then stored by the storage module. The system has the advantages that through cooperation of multiple modules, laser parameters can be flexibly adjusted, the attitude can be accurately positioned and sensed, environmental errors are corrected to calculate the clearance height, and the ship navigation safety is greatly improved.

The application provides a micro-element three-dimensional dynamic deformation measurement device and method for a dynamic true triaxial system. A loading device is used to dynamically load a sample, and two laser measurement systems are arranged in the axial direction without loading. In the method, step 1: loading and measurement process and measurement data description; step 2: based on the measurement scheme of the double-face eight-point symmetrical arrangement, a calculation method for the dynamic off-plane deformation value of the X-axis is provided. The application provides a new paradigm for precise measurement under dynamic loading conditions. With the performance of laser Doppler microsecond-level dynamic response and nanometer-level precision, combined with the symmetrical measurement point layout, the interference of absolute displacement is eliminated through mathematical principles, the technical path of dynamic deformation measurement under complex dynamic disturbance is reconstructed from the principle level, and the micro-element three-dimensional dynamic deformation measurement under dynamic true triaxial loading is realized.

The invention relates to the technical field of laser measurement equipment, in particular to a marble linear motor detection platform, which is characterized in that a fiber grating sensor network is embedded in a marble base body to monitor the temperature field distribution of the platform in real time; the thermal compensation controller calculates platform deformation data according to a pre-stored thermal deformation-temperature relation model and outputs real-time compensation to the laser measurement system; the subarea active cooling system surrounding the linear motor stator can independently adjust the temperature of each area and construct a controlled temperature field; the system also has thermal deformation prediction feedforward and model parameter self-correction functions, and a complete intelligent thermal management closed loop is formed. According to the scheme, the influence of thermal drift on the measurement precision can be effectively suppressed, and the stability and reliability of the platform in a complex thermal environment are improved.

The invention relates to the technical field of airplane horizontal measurement and airborne equipment calibration, in particular to a vision-enhanced laser measurement system and a measurement method. The system comprises an AGV intelligent transport vehicle, a multi-section lifting electric cylinder arranged on the AGV intelligent transport vehicle, a rotary table arranged on the multi-section lifting electric cylinder, a laser radar and a high-resolution telephoto camera which are arranged on the rotary table, and a control terminal connected with the AGV intelligent transport vehicle, the multi-section lifting electric cylinder, the laser radar and the high-resolution telephoto camera through networking equipment. The control terminal is provided with image processing software and a target recognition algorithm. According to the invention, the measurement precision is improved; the measurement efficiency is improved; the adaptability and the flexibility are improved; and the long-term cost is reduced.

This utility model relates to a gantry mechanism for an automatic bricklaying equipment in a cement rotary kiln. It includes a gantry body structure and a central steering cylinder structure. The gantry body structure comprises an outer frame structure and a central steering cylinder mounting structure housed within the outer frame structure. The central steering cylinder structure includes a rotating cylinder and cylinder connecting components within the rotating cylinder. The outer frame structure includes a set of side-end connecting seats, a top connecting beam located above the two side-end connecting seats, and a mounting cylinder connecting seat located below the two side-end connecting seats. A bottom vertical push cylinder assembly is disposed between the mounting cylinder connecting seat and the central steering cylinder mounting structure. Employing a double-layer "gantry-central cylinder" structure, it achieves composite control of wide-range movement and millimeter-level positioning. The cylinder assembly and laser measurement system form a closed-loop feedback, improving centering accuracy by over 80% compared to traditional methods. The cylinder support system is equipped with multi-stage pressure relief valves to prevent structural deformation due to overload.

The utility model belongs to the field of precision machinery manufacturing and automation control relates to a kind of servo drive structure of configuration time gage and laser measuring instrument.It includes servo motor, roller screw, drive workstation and time gage measuring system.Servo motor drives roller screw through coupling, and then drives the linear motion of workstation.Time gage is installed in the side of workstation, and is detected displacement with reading head cooperation.The utility model directly measures by integrating high-precision time gage, effectively eliminates transmission chain error;And additional laser measuring system real-time monitoring screw thermal deformation state, carries out fault early warning, to significantly improve the positioning accuracy and long-term operation reliability of workstation.