Laser sensor for tribological examinations of brake discs
Brake discs can be made from a variety of materials, such as grey cast iron or ceramic. The brake pads are also made from different materials. Tests are run in order to check the wear of the brake pads. The changing surface structure (matt, glossy, rough, smooth) is a challenge for any measurement process that uses optical measuring methods. In tests, the brake disc is rotated at realistic driving speeds of up to 100km/h. The optoNCDT ILD 2300-10 laser triangulation displacement sensor captures the topography of the brake disc. The displacement sensor is mounted to a table, which can be moved in X/Y axes with micrometre accuracy. The laser triangulation sensor is moved across the brake disc in order to scan it at a speed of up to 50 kHz. The high precision laser sensor determines wear even for advanced low-wear materials, and can detect even the smallest of tears. Despite these irregular surface structures, high precision, reproducible results can be measured and evaluated.