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铸坯表面温度场测量仪的研究 预览 被引量:4

Research on the measuring instrument for surface temperature field of casting billet
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摘要 基于面阵CCD(charge coupled device)的测温系统可以有效克服氧化皮对铸坯表面温度测量的干扰,近年来成为高温测量领域研究的热点。但CCD的非线性关系导致动态测温范围窄、低温段测量精度低。基于窄带带通滤光片建立了单光谱辐射CCD测温模型,据此研制了由滤光片、CCD、CCD信号处理器及DSP构成的铸坯表面温度场测量仪。通过一点标定和自适应调整光积分时间,扩展了CCD测温范围,同时改善了低温段的测量精度,使各温度段测量结果趋于等精度分布;采用4级流水线机制及DSP、工控机(industrial personal computer,IPC)2级数据处理结构,提高了系统的实时性;该仪器还具有暗电流补偿和以太网传输功能。通过黑体炉标定和现场测量,结果表明研制的测温仪满足铸坯表面温度场测量要求。 The CCD (charge coupled device) temperature measuring system based on area array CCD can effectively overcome the interference of oxidized scales on the surface temperature measurement of billet, which becomes a hot studying issue in the field of high-temperature measurement. However, the nonlinear relation of CCD narrows its temperature measurement range and leads to poor precision in low temperature segment. This paper establishes a CCD temperature measuring model of single spectrum radiation based on narrow band-pass filter, based on which a measuring instrument of surface temperature field for casting billet is designed. The instrument is composed of optical filter, CCD, CCD signal processor and DSP. Through one point calibration and adaptively adjusting light-integration time, the temperature measuring range is extended, the measuring accuracy in low-temperature segment is improved, and the precisions of measured results in all temperature segments tend to an equal distribution; The system adopts 4-stage pipeline mechanism and double-stage data processing structure composed of DSP and IPC ( industrial personal computer), and the real-time performance of the system is improved. Furthermore, the instrument also has the ad- vantages of Ethernet data transmission and dark current compensation. Through black-body furnace calibration and field measurement, measurement results indicate that the developed instrument meets the requirements of the surface temperature measurement of casting billet.
作者 白海城 张育中 胡振伟 次英 谢植 Bai Haicheng, Zhang Yuzhong, Hu Zhenwei, Ci Ying, Xie Zhi (School of Information Science & Engineering, Northeastern University, Shenyang 110819, China)
出处 《仪器仪表学报》 EI CAS CSCD 北大核心 2012年第6期1392-1399,共8页 Chinese Journal of Scientific Instrument
关键词 铸坯温度测量 单光谱测温 温度场分布 面阵CCD DSP billet temperature measurement single spectrum thermometry temperature field distribution area ar-ray CCD data signal processor(DSP)
作者简介 白海城,2005年于大连理工大学获得硕士学位,现为东北大学博士研究生,主要研究方向为辐射测温理论与技术。E-mml:dlut-bhc@sina.com 谢植,1992年于东北大学获得博士学位,现为东北大学教授、博士生导师,主要研究方向为辐射测温理论、过程参数检测。E-mail:xiezhi@ise.neu.edu.cn
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