振弦式传感器的精确数学模型及其应用.pdfVIP

第 24 卷 增 2 岩石力学与工程学报 Vol.24 Supp.2 2005 年 11 月 Chinese Journal of Rock Mechanics and Engineering Nov.，2005 振弦式传感器的精确数学模型及其应用 1 2 2 2 白泰礼 ，邓铁六 ，谢 军 ，胡凤鹏 (1. 电子科技大学 自动化工程学院，四川 成都 610054 ；2. 山东科技大学 洛赛尔传感技术有限公司，山东 泰安 271019) 摘要：介绍了振弦传感器的精确数学模型，用数据证明该模型可用于初频会发生温度漂移的场所，不需要另作温 漂修正；同时指出：该模型类似线性模型，若把当前的物理量值置为 0，即能准确计算出以后的变化量。基于以 上几点，应用该模型可快速准确地处理数据，实现了振弦仪器的智能化，显著提高了准确度。最后介绍了模型在 初频可测或不可测的某些具体工程测量中的应用。 关键词：数学分析；振弦传感器；数学模型；准确度；温漂修正；零漂修正 中图分类号：O 17 文献标识码：A 文章编号：1000 –6915(2005)增 2 –5965 –05 ACCURATE MATHEMATICAL MODEL OF VIBRATING WIRE SENSORS AND ITS APPLICATION 1 2 2 2 BAI Tai-li ，DENG Tie-liu ，XIE Jun ，HU Feng-peng (1. School of Automation ，University of Electronic Science and Technology of China，Chengdu 610054，China； 2. Loadcell Sensor Technology Company ，Shandong University of Science and Technology ，Tai′an 271019 ，China) Abstract ：An accurate mathematical model for vibrating wire sensors is introduced. The model can be used in the condition that the original frequency varies with temperature drifting and needs no any correction to compensate this drifting. Meanwhile ，it is indicated that the model is similar to the linear one，and the variable difference will be estimated precisely just by setting the initial value to zero. Based on the two basic characters mentioned above ， intelligent instruments adopting this model can show the measured parameters in digital forms ，and help to process the measured data quickly and precisely. As a conclusion ，a difficult problem which has been pensented for a long time in vibrating wire