219 results about "Laser measurement system" patented technology

What is disclosed is a 3-D laser measurement system, including a mirror continuously rotatable about a rotation axis which extends, e.g., in parallel or coaxial with a measuring beam emitted by an optical emitter and impinging on the mirror.

Systems and techniques for laser metrology. Two or more fanned probe beams are scanned relative to a surface including one or more targets. A position detection module receives return beam information from the fanned probe beams, and determines a position of at least a first target of the one or more targets based on the return beam information.

The invention relates to a laser measurement system capable of detecting 21 geometric errors. One of a workpiece clamping part and a cutter clamping part is provided with a laser six-freedom-degree simultaneously measuring unit and a laser ray veering unit, and the other is provided with a geometric error sensitive unit. The laser ray veering unit is provided with a plurality of switchable work gestures or a composition composed of a plurality of parts under an installation state. Through rotation or horizontal movement, the laser beams sent by the laser six-freedom-degree simultaneously measuring unit can be splitted in sequence or rotated to a direction that is parallel to the X axis, Y axis, and Z axis; and the laser beams from the geometric error sensitive unit can be splitted or veered to the laser six-freedom-degree simultaneously measuring unit. The provided system has the advantages of simple structure, convenient operation, once installation, and multi-step measurement, and can detect 21 geometric errors of three linear moving guide rails that are perpendicular to each other. (The figure 3 is the abstract figure.)

A laser metrology system for determining a location of a target utilizes a laser projector having a laser source for projecting a laser beam. A rotating head directs the laser beam in a lateral direction. A sensor associated with the laser projector is capable of sensing the laser beam. A reflective target is configured to reflect the laser beam projector from the laser source toward the sensor in a manner indicative of the angle of the rotating head and the pulse of the laser beam to determine location of the target.

A laser measuring method in a laser measuring system, which comprises a rotary laser system for projecting a laser beam by rotary irradiation and at least one photodetection system having at least one photodetector for receiving the laser beam, comprising a step of emitting at least two fan-shaped laser beams by the rotary laser system, at least one of the fan-shaped laser beams being tilted, a step of receiving the laser beams at least at three known points by the photodetection system, a step of obtaining elevation angles with respect to the rotary laser system based on photodetection signals which are formed when the photodetector receives the laser beam, and a step of measuring an installing position of the rotary laser system based on elevation angles and position data at the three known points.

A rotary laser projecting device comprising a reference plane forming unit that projects two or more fan-shaped laser beams, a distance measuring unit that projects distance measuring light, a rotator for projecting the fan-shaped laser beams and the distance measuring light by rotary irradiation, a horizontal angle detecting unit, a photodetection unit for receiving the reflected fan-shaped laser beams and the reflected distance measuring light, a storage unit, and a control arithmetic unit is disclosed. The control arithmetic unit measures elevation angle of the object reflector from time difference of photodetection between the two or more laser beams, measures horizontal angle of the object based on the result of detection of the horizontal angle detecting unit when at least one of the reflected fan-shaped laser beams and the reflected distance measuring light is received and the distance measuring unit measures a distance to the object to be measured.

The invention discloses a laser measurement system-based taper thread data processing algorithm. The method comprises the following steps of (1) removing gross errors in thread profile data collected by a displacement sensor through adopting a variable coefficient adaptive Laiyite criterion; (2) removing random noise points in the data subjected to the gross error removal by applying an improved wavelet threshold denoising method; (3) fitting the denoised data by applying a robustified least square method; and (4) performing segmentation according to a fitted profile derivative condition and extracting feature points; finally calculating thread parameters through the extracted feature points. According to the algorithm, a drill pipe thread is taken as a research object; the collected thread profile original point cloud data is subjected to the gross error removal and the denoising in combination with the improved wavelet adaptive threshold algorithm through the adaptive Laiyite criterion; the denoised data is fitted through the robustified least square method; a thread profile curve is obtained, the segmentation is performed according to the fitted profile derivative condition, and the feature points are extracted; and finally the thread parameters are calculated through the extracted feature points. Therefore, efficient and quick data processing after taper thread data collection can be realized and the taper thread detection efficiency is improved.

An apparatus including a scanning mechanism, a tracking mechanism, and a processing unit. The scanning mechanism includes a rotating mechanism, a mounting arm rotatably attached to the rotating mechanism, and a light source connected to the mounting arm. The scanning mechanism also includes a mirror connected to the mounting arm, wherein the mirror is positioned to reflect the coherent light. The scanning mechanism also includes a measuring system attached to the mounting arm. The measuring system measures a parameter associated with an object on which the coherent light falls. The tracking mechanism is in communication with the scanning mechanism. The tracking mechanism measures a distance from the tracking mechanism to the scanning mechanism. The processing unit is in communication with the scanning mechanism and the tracking mechanism. The processing unit collects measurement information from the scanning mechanism and the tracking mechanism.

The invention discloses a white light interference and laser scanning-based morphology measurement device comprising a three dimensional motion platform and a white light-laser measurement system positioned on the same. The measurement system comprises a white light source 1, three light splitting prisms, a microscopic ocular lens 5, a microscopic object lens 6, an interference object lens 7, a four-quadrant photoelectric sensor 8, a laser device 9 and an image sensor 10; two measurement optical paths and a laser measurement optical path are provided; the laser optical path has the following structure: light sent via the laser device 9 is turned via a third light splitting prism 4, and then the light is focused onto a surface 11 being measured via the microscopic object lens 6; the light passes through the microscopic object lens 6, the third light splitting prism 4, and a second light splitting prism 3 after being reflected by the surface 11 being measured; then the light is projected to the four-quadrant photoelectric sensor 8 and is used for measuring height information of the surface 11 being measured; light, reflected back by the surface 11 being measured, sent via the laser device 9 is turned via the second light splitting prism 3; after passing through a first light splitting prism 2 and the microscopic ocular lens 5, the light and illumination backlight formed via the white light source 1 are imaged onto the image sensor 10, and a collection image for laser measurement is formed.