2D 3D laser profile scanner principle

Basic principle: triangulation. The laser emits a beam, which is reflected by the measured object to the sensor for reception, and the altitude cloud data is calculated through an algorithm.

Hardware: laser transmitter + receiving sensor + horizontal motion mechanism.

Generally, laser beams of different widths are emitted by parallel and stable movement of one axis.

Measure the point cloud data of the object to be measured.

The visual point cloud graph is formed through the software reading for engineers to judge the defect information.

2D 3D laser profilers for recording, measuring and evaluating the outer contours of surfaces to be measured with different textures, can provide a total solution from profilometer probes to complex measurement systems.

A laser profiler, also known as an outer profile sensor. The principle of laser triangulation reflection is used to collect two-dimensional contour information of different material surfaces. With a special set of lenses, the laser beam is amplified to form a static laser line that is projected onto the surface of the object to be measured.

The laser beam is amplified by a set of specific lenses to form a static laser line that is projected onto the surface of the object to be measured. The high-quality optical system projects the diffuse reflection of this laser line onto the highly sensitive sensor sensory matrix. In addition to the distance information from the sensor to the measured object (z-axis), the controller can also use this image to calculate the position along the laser line (x-axis).

The sensor finally outputs a set of two-dimensional coordinate values, and the origin of the coordinate system is relatively fixed to the sensor itself. By moving the object to be measured or the sensor, a three-dimensional measurement result can be obtained.

The laser light emitted by the laser diode can form a dot-like spot on the surface of the object to be measured. A special lens set is used to diffuse the laser dot into a line. Conventional splitter laser sensors use a cylindrical lens to refract laser.

The biggest problem with this traditional method is the very weak edge illuminance caused by the Gaussian intensity distribution along the laser line. The ScanControl profile sensor from the German company Mi-Iridium uses a precision wedge-shaped lens, which can eliminate the problem of light intensity attenuation along the edge of the laser line.

3D laser scanning technology is a new technology that has emerged in recent years, which has attracted more and more attention in the research field in China. It uses the principle of laser ranging, and can quickly reproduce the three-dimensional model of the measured target and various drawing data such as lines, surfaces, and volumes by recording the three-dimensional coordinates, reflectivity and texture of a large number of dense points on the surface of the measured object. Since the 3D laser scanning system can intensively obtain a large number of data points of the target object, the 3D laser scanning technology is also known as a revolutionary technological breakthrough that evolves from single-point measurement to area measurement compared with the traditional single-point measurement.

This technology has also been experimented, applied and explored in the fields of cultural relics and monument protection, architecture, planning, civil engineering, factory renovation, interior design, building monitoring, traffic accident handling, legal evidence collection, disaster assessment, ship design, digital city, military analysis and other fields. The 3D laser scanning system consists of a hardware part for data acquisition and a software part for data processing. According to the different carriers, the 3D laser scanning system can be divided into airborne, vehicle-mounted, ground and handheld.

Scanning technology is applied to measure the size and shape of the workpiece. It is mainly used in reverse engineering, responsible for surface reading, three-dimensional measurement of workpieces, and can quickly measure the contour collection data of the object without technical documentation for the existing three-dimensional physical objects (samples or models), and construct them, and modify and generate a surface digital model of the general output format.

3D laser scanners work the same as holographic**. First of all, the laser is divided into two beams, a beam of light irradiates hundreds of objects, and a beam is directly illuminated on the bottom piece, so that the photosensitive original is sensitive, and all the stripes are recorded to record the three-dimensional image of the object, and then the laser is used to irradiate the holographic ** to show the true face of the object. For more questions about laser scanning, please consult the customer service of Shenzhen SINCEVISION Intelligent Technology.

The working principle of the ZLDS200 profilometer is based on the principle of optical triangulation. Diode laser generators.

The light emitted by the plate forms an X-plane light curtain through the lens and forms a contour line on the object, the lens collects the light reflected back by the object and projects it onto a two-dimensional CMOS array, so that the cross-sectional pattern of the target object is analyzed and processed by the signal processor, the length of the contour line is measured by the X-axis, and the height of the contour line is measured by the Z-axis.

This kind of sensor generally uses the principle of laser triangulation, such as ZLDS200 and ZLDS210 laser 2D scanning profile sensors, but the measurement method is a little different.

At the receiving end, the contour technical parameters of the measured object are set in advance, and the specified limits of the technical indicators are scanned and compared by laser rays.

Then make a genus. Determination of pass or failure. Then by the mechanical sorting mechanism, do the identification, or separate the qualified and unqualified exit channels.

Do you understand? In fact, it is the same as projection, but the laser accuracy is greatly improved.

JT-SCAN is the first self-developed and cost-effective desktop 3D scanner in China.

Working principle: The object is placed on the rotating table, the precision one-line laser is irradiated on the object, and the camera takes a picture to automatically extract the outline of the body, generate a point cloud, fit a surface, and finally form a three-dimensional model.

It can help you more easily convert real objects into data that can be used for 3D printing, can help you quickly build 3D models, and can help you analyze and measure objects.

Application industry: 3D printing, toy model scanning, rapid modeling, animation production, reverse engineering, mold industry, handicrafts, glass molds, stone carving, wood carving, underwear shoe molds, etc.

Xintuo 3D XTOM 3D scanner is composed of two high-resolution industrial CCD cameras and grating projection, using structured light measurement, using grating projection to project a group of grating stripes with phase information to the surface of the measured workpiece, and the left and right cameras are synchronously collected, which can obtain the three-dimensional data of the surface of the measured object in a short time. Using a variety of stitching technologies, the 3D data of different positions and angles is automatically stitched to obtain complete 3D data.

This 3D scanner is very good, fast and high-precision, you can take a look at the official website of Beijing Shangtuo Technology.

The laser profile sensor adopts the principle of laser triangulation reflection: the laser beam is amplified to form a laser line projected onto the surface of the measured object, the reflected light passes through the high-quality optical system, is projected onto the imaging matrix, and the distance from the sensor to the measured surface (z-axis) and the position information along the laser line (x-axis) are calculated. Move the object to be measured or the probe of the profilometer to obtain a set of three-dimensional measurements.

The laser triangulation reflection displacement sensor adopts the principle of laser triangulation reflection, and the measurement spot is a point, commonly known as point laser. In essence, the measurement principle of the laser profile scanner is also triangulation reflection, but the imaging CCD is a group, and the measuring spot is a line, so it is commonly known as a line laser. The measurement accuracy of the point laser is high, but if you want to measure all the topography of the object to be measured in a large area, the efficiency will be low, because it is necessary to measure point by point.

The line laser can scan the surface and quickly form a 3D profile, but the accuracy will be reduced. The specific choice depends on the requirements of the actual measurement task. German Mi-Iridium Spot Laser Series German Mi-Iridium Line Laser Profiler.

The working principle of the ground-based 3D laser scanning system: the 3D laser scanner transmitter emits a laser pulse signal, which is diffusely reflected by the surface of the object, and then transmitted back to the receiver along almost the same path, which can calculate the distance between the day mark p and the scanner, and control the encoder to simultaneously measure the transverse scanning angle observation value and the longitudinal scanning angle observation value of each laser pulse. 3D laser scanning measurement is generally a custom coordinate system of the instrument.

The x-axis is in the transverse scanning plane, the y-axis is perpendicular to the x-axis in the transverse scanning plane, and the z-axis is perpendicular to the transverse scanning plane. Get the coordinates of p.

In the traditional measurement concept, the final output of the measured data is two-dimensional results (such as CAD drawing), in the total station of the measuring instrument, the proportion of GPS is the majority, but the measured data are in two-dimensional form. In today's gradual digitization, three-dimensional has gradually replaced two-dimensional, because its intuitive two-dimensional can not be represented, and the data measured by the three-dimensional laser scanner each time not only contains the information of X, Y, and Z points, but also includes the color information of R, G, and B, as well as the information of the object's color inversion. Such comprehensive information gives the impression that an object is being reproduced in a computer, which is not possible with ordinary measurement methods.

Using the principle of laser ranging, by recording the three-dimensional coordinates, reflectivity and texture of a large number of dense points on the surface of the measured object, the three-dimensional model of the measured target and various drawing data such as lines, surfaces and volumes can be quickly reconstructed.

A 3D laser scanning device in the beta phase to see how it works.

The principle of the 3D scanner is to hit the laser on the surface of the part, the CCD camera receives, and the three-dimensional point cloud is traveled, and the laser has red, blue, red and blue colors. If you need to take global photography with precision requirements, there are also global and scanner all-in-one machines on the market.

The basic working principle of the 3D scanner is to adopt a composite 3D non-contact measurement technology that combines structured light technology, phase measurement technology, and computer vision technology. The so-called photographic measurement is similar to the camera to take pictures of the object in the field of view, the difference is that the camera captures the two-dimensional image of the object, and the developed measuring instrument obtains the three-dimensional information of the object.

Unlike traditional 3D scanners, this scanner can measure one face at the same time. When the measurement time grid projection device projects several specific coded structured light onto the object to be measured, the two cameras at a certain angle synchronously collect the corresponding image, and then decode and phase calculate the image, and use the matching technology and the triangulation measurement principle to calculate the three-dimensional coordinates of the pixels in the common visual area of the two cameras.

As for the specific 3D scanner products, you can visit the official website of Weibu 3D to view.