绝对变形量的相对位移法监测

Monitoring Absolute Amount of Deformation with Relative Displacement Method

研究目的:探讨在狭窄空间、无法建立绝对测量基准的情况下,对变形体的绝对变形量实施监测的问题。研究方法:利用相对变形测量来确定变形体的绝对变形。首先利用尼龙丝基准和百分表测量杆,测量变形体相对周围参照点的相对变形测量;在进行相对测量的同时,用常规测量方法测定参照点的绝对位置,并由此来推求变形体的绝对变形量。研究结果:在方案比选和分析原理的基础上,推导出了适用的变形量计算模型。研究结论:通过实际应用和实测精度分析表明,实际测量的变形结果与理论分析的变形趋势一致,监测精度达到了亚毫米级,能灵敏反映变形体的真实变形,可以满足高精度变形监测工作的需要。

Research purposes： The purposes are to make exploration on how to solve the problems of monitoring absolute amount of deformation of plasmodium under condition of no way to establish measuring datum in narrow space. Research methods：The absolute deformation of plasmodium is measured through measurement of relative deformation. First, the relative amount of deformation of the reference point surrounding the plasmodium is measured with nylon yarn base line and dialgauge measuring rod. At the same time of mak reference point is measured with common measuring method and plasmodium can be derived. ing relative measurement, the absolute position of from which the absolute amount of deformation of plasmodium can be derived. Research results：The computing model for amount of deformation is derived on the base of program selection and analysis principle. Research conclusions： The application and analysis of measured accuracy show the result of measured deformation confirms to the deformation from theoretical analysis and the monitored accuracy reaches at submillimeter level, which can reflect the real deformation of plasmodium sensitively and meet the demands of monitoring deformation with high accuracy.