Laser Scanner 3D

Laser Scanner 3D

Principles Of Measurement

The working principle is that of triangulation. The system is composed of a laser plane and a camera.
The laser ray produced by a diode is focused and transformed into a plane (also called sheet of light) that intercepts the target object. The target object diffuses, at least partially, the light which is collected by a particular kind of focalizing optic. The position of the sheet of light on the sensor allows for the reconstruction of the distance (Z) and position (X) of the target.

Degrees Of Freedom Of a Scanner

The choice of components and the geometrical layout, which have been made in the planning phase, affect the main characteristics of the scanner:

Geometrical Parameters: laser-sensor distance and triangulation angle
Electronic devices: Receiving sensor and laser (power and wavelength)
Optical components: focal length and optical configuration

The adopted design parameters lead to defining the scanning measure range and the resolution in the Z X physical plane:

SMR: (Start Measure Range) is the minimum working distance of the instrument
EMR: (End Measure Range) is the maximum working distance of the instrument
XScan (SMR) is the maximum measurable width at the minimum working distance
XScan (EMR) is the maximum measurable width at the maximum working distance

Weld Joint Control

Surface scanning before welding operation makes it possible to verify that the pieces which are being welded are in the correct position. Furthermore the scanning can be used to correct the trajectory of the welding torch.

Nut Checking

It is possible to acquire 3D images if an accurate synchronization between the conveyor belt and the scanner is available. The scanner linearization allows us to have Z Map Images where the Z axis is perpendicular to the conveyor belt.

Pasta Checking

Checking product distribution on the transportation surface is also possible. We can measure the quantity of product per unit of time and check if an exceeding amount of overlapping occurred in real time.

Nipples Checking

Counting the number of known mechanical objects and locating their pose is possible. Furthermore it is possible to find out which are in the best position to be picked up by a robot end effector.