High-speed and high-precision online detection system of the tile smoothness

In order to achieve high-speed and high-precision detection of the wall and floor tiles products´ smoothness, this paper presents a fast calculation method of high-precision crooked degree of boundary and center, and develops an online detection system, which is composed of transmission, detection and classification, of the tiles smoothness based on PLC and HMI. The detection system uses the optical triangulation detection method, applies the high-precision noncontact laser displacement sensors for information collection, and pinpoints the moving tiles sampling location by the encoder, the main computer system carries on the smoothness operation for the collected surface information after conversion process, drives the classification device to make the grade marking and grading to the tiles based on the operation results. The spot experiment data show that the average detection speed of the tile smoothness detection system is 30(m/min), the repeated measurement precision of the same direction is ± 0.04mm and the detection accuracy can be achieved more than 95%, which are able to meet the tile production enterprises´ requirements for the high-precision online detection of the smoothness.