MEASURING SYSTEMS IN
MEASURING SYSTEMS IN TUBE MILLS MEASURING SYSTEMS IN TUBE MILLS System Configuration Signal Processing Configuration The measuring systems are designed for the particular measuring task and rolling mill configuration in cooperation with the customer. A measuring system usually consists of the following components: Gauge (measuring frame in C- or O-frame shape with one to 13 measurement axes) Further sensor measuring systems to determine diameter, ovality, diameter profile, temperature, length and speed Auxiliary components for the gauge such as power supplies and monitoring equipment, cooling systems, etc. Central signal processing unit with multiprocessor system including operation, visualization and necessary network components Visualization stations for the operating and maintenance personnel Quality management system for documentation and archiving of tube and system data over longer periods of time Disturbance compensation To obtain exact measured data, the following influences must be compensated: Dirt, e.g. scale, dust, lubricants, etc. Measuring piece position changes on the roller table Measuring piece temperature, for calculation of cold or hot dimensions Measuring piece alloys deviating from standard alloys The influences of the disturbances are measured with the help of suitable sensors or obtained from data specifications and compensated by mathematical processes or automatic adjustment procedures. Signal transmission The detector signals are digitalized in the C- or O-frame and transferred to the measured value processing unit via an Ethernet network system. Fiber optic transmission components are used in the case of long distances between the gauges and the central signal processing unit. MEVInet The powerful multiprocessor system MEVInet is responsible for complete evaluation of measured values, monitoring of the measuring system as well as operation, visualization, data management and quality assurance. The individual components are connected to each other by a fast data network. The computer system MEVInet consists of the following main components: Real Time computer Operating system Windows Runtime system logiCAD Server, HMI Operating system Windows MS SQL-Server Visual Basic / IMS Dataviewer Project planning system logiCAD to IEC 1131 (Freely programmable control and regulation) Comprehensive monitor screens enable optimum operation of the measuring system as well as userfriendly service and maintenance work. Optimization and long-term support of the measuring systems installed around the world are effected by remote maintenance via internet. The measured data is evaluated according to customer requirements and sent to master systems. The tube measuring system determines the following variables: Mean wall thickness Individual wall thickness around the tube circumference * Eccentricities of first to sixth order* Tube cross sectional profile * Outside diameter, ovality and diameter profile Temperature and length All measured values are available directly during measurement as online display and are shown at the end of the measurement as profile along the tube length Long-term data acquisition and statistical distribution * Dependent on type of system HMI 1 HMI 2 HMI 3 GAUGE COMPUTER ROOM OPERATION, QUALITY ASSURANCE Ethernet V-Client Windows V-Client Windows V-Client Windows Network Customer / IMS HMI HMI HMI Ethernet Q-Server Windows Raid 1 Network IMS-Computer RTR1 Ethernet Remote access Ethernet MC-Server Windows logiCAD MC-Server Windows logiCAD MC-Server Windows logiCAD MC-Server Windows logiCAD Network IMS-Measuring equipment RTC = Real Time Computer HMI = Operation and Visualization Ethernet Control and optimisation level Customer Measuring system Weight measurement bloom before Rotary Hearth Furnace Measuring system Diameter measurement and length measurement hollow bloom Measuring system Temperature measurement hollow bloom before PQF / FQM Measuring system Temperature measurement shell behind Reheat Furnace, before Stretch Reducing Mill Measuring system Temperature measurement bloom before Rotary Piercing Mill Measuring system Temperature measurement mandrel bar of PQF /FQM Measuring system Thickness measurement, temperature, diameter and length shell behind PQF / FQM Measuring system Thickness measurement, temperature, diameter and length tube behind Stretch Reducing Mill 6 7
