In order to realize automatic measuring of the flatness of ceramic tiles and automatic classification of the product quality a detection system is designed. The detection system using optical triangle method of testing technology, through the encoder and PLC high-speed counter function to the precise location of the ceramic tile of mobile, uses laser displace ment sensor to ceramic tile surface information collection, after the AD transform .using PLC to operations by a particular internal algorithm flatness calculation. Results show: tile flatness measuring accuracy of the system is ±0.1 mm, same direction detection accuracy is ±0.05 mm, measuring accuracy is 95%;measuring efficiency is 40 pieces per-minute, it is suitable for the quality control during the process of ceramic tile production.%为实现瓷砖平整度的自动在线检测及分级,设计了基于PLC、组态软件和激光位移传感器的瓷砖平整度实时检测分级系统.系统由传送、检测和分级三部分组成.该检测系统采用光学三角法检测技术,通过编码器及PLC的高速计数器功能对移动中的待检测瓷砖的采样位置进行精确定位,使用激光位移传感器对瓷砖表面进行信息采集,经AD转换后在PLC内部按照特定的算法进行平整度运算,以PLC为核心实现瓷砖的分级处理和对设备的整体控制.实验表明该检测系统高效、稳定、可靠.瓷砖平整度检测精度为±0.1 mm,多次同方向检测精度为±0.05 mm,检测速度为每分钟40片,检测准确度可达到95％以上,适用于当前瓷砖生产过程的质量控制.
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