辽宁科技大学本科生毕业设计 第1页英文原文：HOT ROLLING MILL （Infrared temperature measurement /Application Information)SPECIALISTS IN NON CONTACT TEMPERATURE MEASUREMENTLAND, acknowledged leaders in the field of radiation thermometry, have supplied the Steel industry throughout the world with temperature measuring equipment for over 55 years. Today LAND manufacture a complete range of measurement equipment designed specifically for hot metal rolling applications. All are designed to the highest standards of quality and reliability to ensure accurate measurements in the harsh operating conditions of the hot mill.LANDs reputation for quality products and service is attributable to good product design, to technical expertise and especially to extensive application knowledge. This knowledge has been gained by providing effective solutions to the varied problems of temperature measurement in the forming and rolling of hot metal. Since the introduction of non contact thermometers into the modern hot rolling mill, their role has developed into providing a primary source of vital process information. They now fulfil three vital roles on the rolling mills of any modern steelworks.Product Quality To ensure the finished product has gained the correct metallurgical properties the temperature must be closely monitored, not just in the finishing sections but throughout the process from casting to finishing.Product Uniformity It is not sufficient to achieve the desired level of quality for a single batch-once attained this level must be consistently maintained.Process Control Whether control on the mill is manual or automatic，the control of critical temperatures is vital for the maintenance of quality, uniformity, throughput and energy consumption, and to ensure increased longevity of rolls and mill equipment. Selection of the ideal thermometer is vital. Provided careful consideration is given to not just the thermometer and signal processing requirements, but also the location, sighting and service requirements; long term, trouble free, accurate temperature measurement will result. The information contained here highlights the locations, the recommended systems, their individual specifications and alternatives which are available. More detailed information is freely available from LAND.WHY USE LAND NON CONTACT RADIATION THERMOMETERS?1. Radiation thermometers need no contact with the measured object, which means no contamination, interference or damage caused to the products or the equipment2. Flexibility in the choice of fixed, fibre optics systems or portable instruments to give comprehensive cover for all temperature needs.3. Minimal maintenance and extended trouble free operation once correctly installed.4. All Land Instruments International products are backed by BS EN ISO9001:2000 Quality Management System Approval and BS EN ISO/IEC 17025.5. Accurate, reliable and stable measurement increases confidence in long-term product quality.6. Traceability of calibration is to National Standards. Calibration certificates are available from our UKAS accredited calibration laboratory No.0034 in the U.K. and NIST(National Institute of Standards and Technology)in the U.S.A.LAND know how, expertise and support-world wide. Also, a range of application dedicated products including Landscan infrared linescanners, Furnace Thermometers System (FTS)and Under strip Temperature Measurement System are aimed specifically at hot rolling mill applications.TYPICAL ELEMENTS OF A NON CONTACT RADIATION THERMOMETER SYSTEM1. A high precision radiation thermometer which detects infrared energy emitted from the target surface and converts it into an electrical signal to be passed to the signal processor.2. A high accuracy signal processor which linearizes the thermometer output signal and produces a signal suitable for interface with any indicating, recording or mill control equipment.3. Some form of protection against the measurement environment. In a typical fixed system this would include a protection jacket giving water cooling and lens purging facilities, an end cap to provide environmental sealing, along with a mounting plate. Fibroptic thermometers do not require water cooling as they have the capability to withstand high ambient temperatures up to 200C/392F.The portable thermometers are self contained units protected by a durable jacket; they are supplied in a hard carrying case.The schematics diagrams detailed on the following pages illustrate the principal features of a modern rolling mill. The areas highlighted offer measurement reference points, where LAND s radiation thermometry know-how can really benefit you. If the specific area of concern is not covered here our engineers will be pleased to discuss your requirements.Continuous Caster-Strand Temperature Measurement in the Spray ChamberA very special thermometer is needed here to