The essence of triangulation measurement is to analyze the light field modulated by the surface morphology of a three-dimensional object, in order to obtain the three-dimensional information of the object surface. The basic structure of measuring the surface morphology of an object using the triangulation method is shown in the figure:

The linear laser emitted from the laser irradiates the surface of the target to be measured, and within a certain depth range of the target surface, the laser approximately propagates along a plane. Any point on the laser contour is imaged onto a pixel in a high-speed camera, and after calibration by the high-speed camera, each pixel corresponds one-to-one to a spatial line. The intersection of the laser propagation plane and the spatial line determined by the pixel point determines the contour point. Using this principle, the three-dimensional coordinates of each laser point in a laser profile can be calculated.

3DThe measurement accuracy of the measurement system mainly depends on the imaging size of the high-speed camera pixels in the object space, the frame rate of the high-speed camera, the motion error of one-dimensional scanning, and the accuracy of system calibration. The measurement system using ordinary high-speed cameras requires developers to process the high-speed images output by the camera themselves, locate the laser lines on the surface of the object, and solve the three-dimensional coordinates of the contour based on the principle of triangulation.

Function Introduction:

1Simple structure and fast measurement speed;

2Has real-time processing capability, flexible use, and strong adaptability

Applicable fields:

Machine visionAutomatic processing, industrial line inspection, product quality control, physical imitation (reverse engineering), biomedical, etc.

Examples of high-speed camera models that can be matched:

1SwitzerlandPhotonfocusMV1-D2048-3D04-760-G2( 179fps@2048x 2048 x 8bits)+IPC

2SwitzerlandPhotonfocusMV1-D2048x1088-3D03-760-G2-S10( 358fps@2048 x 1088 x 8bits) +IPC

3SwitzerlandPhotonfocusMV1-D2048x1088-3D03-760-G2( 348fps@2048 x 1088 x 8bits) +IPC

4SwitzerlandPhotonfocusMV1-D1312-3D02-160-G2( 113fps@1312x 1082 x 8bits) +IPC

5SwitzerlandPhotonfocusMV1-D1024E-3D02-160-G2( 150fps@1024 x 1024 x 8bits) +IPC

6SwitzerlandPhotonfocusMV-D1024E-3D01-160-CL( 150fps@1024x 1024 x 8bits) +IPC

Article source:http://www.rocketech.cc/index.php?mod=zypro&classid=9&id=16