Sectors

Automotive

One of the most demanding and technologically advanced sectors. It is not difficult to find a system based on artificial vision in each of the automated processes.

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Precise measurement on piston rings

Solution for the precise measurement of diameters and perimeter in the piston rings by means of artificial vision. This inspection is strictly necessary to ensure a perfect fit between the piston and the ring.

Los aros son un componente imprescindible para garantizar la harmonía necesaria entre los elementos conformadores del motor, un objetivo común en el sector de la automoción con la finalidad de mantener su integridad mecánica intacta.

Por lo consiguiente y bajo las especificaciones dadas por las propias propiedades de los elementos a inspeccionar, en este caso se diseña un sistema de medición precisa mediante visión artificial con elementos telecéntricos.

Para lograr una precisión elevada existen varios factores imprescindibles a considerar, que dependen de la conjunción cámara-lente-iluminación.

En el mundo de la visión artificial, cuando la inspección involucra una medición, implícitamente se está considerando la implementación de una lente telecéntrica.

Por otro lado, más que la propia precisión que puede llegar a alcanzar el sistema, este se caracteriza por la aportación de unos resultados con una gran repetibilidad, un factor que nos conduce a la posibilidad de poder parametrizar el sistema y poder obtener las desviaciones y tolerancias de las medidas obtenidas.

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Weld bead inspection

Inspection of the correct quality of the welding bead, carried out by laser triangulation (Compact 3D camera)

Inspection of the correct quality of the welding bead, carried out by laser triangulation (Compact 3D camera) allows:

    ● Evaluate the correct composition of the weld in both depth (Z) and width.
    ● Detection of holes in the beginning and end of the cord.
    ● Double sheet detection.
    ● Over-welding.

The data acquisition is done by means of a 3D acquisition system. Once the acquisition is done, the data (PointCloud + intensity buffer) is sent to the PC that is in charge of processing the information.

The routine of vision:

Once the point cloud is acquired, a Z-Min & Z-Max conversion of the data to grayscale is performed. The result of the conversion is an 8-bit image for processing with conventional 2D tools.

Conversion of point cloud ROI to grayscale:

Convert 3D point cloud ROI to grayscale.

The cord start and end controls check for holes.

To inspect the composition of the weld, profile cuts are made along the entire surface of the bead.

Representation of point cloud profile cut-out:

    ● Cutting profile representation pointCloud.
    ● Representation of NOK point cloud profile cut.
    ● Detection of excess material.
    ● Detection of welding failure.
    ● Hole detection at the beginning and end of the cord.

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Tyre marking inspection

In a tyre production process, the installation of an artificial vision system capable of verifying the presence of a marking is required to provide the necessary information regarding the properties of each section of the product marked.

In a tyre production process, the installation of an artificial vision system capable of verifying the presence of colour marking is required. These markings provide the necessary information regarding the properties of each marked section of the product.

This inspection is strictly necessary for the automotive industry due to the urgent need to know the properties of each component in order to carry out a suitable assembly for the shaping of the final product.

Pneumatic inspection of artificial vision

To carry out this inspection, a vision system focused on color analysis is implemented, which then returns the location of the mark located in the field of vision. A subsequent comparison with the expected results, depending on the model, determines the validity of the product.

In this case, two types of marks are considered:

Point: A mark on the top surface of the tyre indicating the lightest part of the tyre. Information required for proper alignment with the rim ("matching"). One point per tyre.

Lines: Markings along the entire tyre circumference that determine the tread composition according to the assigned colour. The treads respond to the part of the tyre that is in direct contact with the pavement, so it is important to give each section the required properties to ensure its functionality. The number of lines varies according to the model.

Inspections carried out on tyres using artificial vision.

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Robot guidance by artificial vision

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