STEEL SHEET THICKNESS MEASURING SYSTEM USING A PROCESS PLC WITH A THICKNESS GAUGE SIGNAL PROCESSING FUNCTION, CAPABLE OF PROCESSING THICKNESS GAUGE DETECTION SIGNALS BY THE PROCESS PLC

摘要

PURPOSE: A steel sheet thickness measuring system using a process PLC(Programmable Logic Controller) with a thickness gauge signal processing function is provided to produce a continuous product without stopping a production process even though the thickness gauge is malfunctioned.;CONSTITUTION: A steel sheet thickness measuring system using a process PLC(20) with a thickness gauge signal processing function comprises a frame(10). An X-ray generating unit(12), a detection unit(14), and a digital signal processing unit(16) are mounted on the frame. The X-ray generating unit irradiates X-rays on a steel sheet. The detection unit detects the X-rays which are attenuated by passing through the steel sheet as micro electric signals. The digital signal processing unit amplifies the micro electric signals which are analog signals transmitted by a detector and converts the same into digital signals. The process PLC receives the digital signals from the detection unit and the digital signal processing unit and processes the digital signals autonomously, thereby converting the detection signals into a thickness value.;COPYRIGHT KIPO 2013;[Reference numerals] (12) X-ray generating unit; (14) Detection unit; (16) Digital signal processing unit; (20) Process PLC; (30) Utility; (AA) Process computer; (BB) Converter; (CC) Thickness system area; (DD) Steel plate