共查询到20条相似文献,搜索用时 46 毫秒
1.
德国米铱公司生产的电涡流位移传感器,主要用于油膜厚度的在线精密测量。此电涡流传感器主要包括控制器(DT3010-A,适用于非铁磁材料的测量,如铝材料)和传感器探头(U05,0.5mm量程,非屏蔽)。传感器的线性度达到1.25μm,静态分辨率达到0.025μm,频率响应为25kHz,可在-50~150℃的环境范围内使用, 相似文献
2.
文章简述电涡流式振动位移传感器的工作原理,并根据《JJG644—2003振动位移传感器检定规程》,从理论和实践上对电涡流式振动位移传感器静态特性、动态特性的检定方法展开研究,以提高电涡流式振动位移传感器测量的准确性和量值的统一性。 相似文献
3.
4.
<正>设备监测诊断的概念:通过实时监测设备的横向位移、纵向位移、轴向位移,分析对比位移情况和振动幅度来测量压缩机的振动情况,测出振动曲线,分析后得出设备位移量。这种方式称之为设备监测诊断。目前我厂的设备主要有往复式压缩机和离心式压缩机,我们的工作主要是对这两种压缩机的位移情况进行测量,确保位移在允许偏差之内。我 相似文献
5.
6.
7.
该文介绍了电涡流传感器输出特性自动检测系统的组成和方法,为简化计算,将检测数据转到EXCEL表格来处理结果,还分析了检测系统的测量不确定度。 相似文献
8.
9.
10.
11.
12.
H.-J. CONRATHS 《International journal for numerical methods in engineering》1996,39(1):141-163
The paper presents a special finite element formulation for the computer simulation of an inductive heating device for thin moving metal strips. The calculation includes both the electromagnetic field and the temperature distribution resulting from the losses of the induced currents. The electromagnetic field is described by an electric vector potential and a magnetic scalar potential, the induced eddy currents are represented by a special boundary condition for the magnetic scalar potential along the surface of the current-carrying strip. This avoids the necessity to discretize the thin secondary region. The thermal model includes the movement of the strip as well as convection and radiation as its surfaces. The field equations are discretized using the Galerkin variant of the Method of Weighted Residuals. The mutually coupled electromagnetic and temperature fields are then calculated using an iterative, staggered solution scheme. Comparisons between calculated and measured temperature profiles show the validity of the presented approach. 相似文献
13.
14.
本文给出了一种椭圆弧长的作图求解方法,即由作图求得椭圆弧长的近似值。通过对100个椭圆弧长的求解结果表明,由此方法求得的椭圆弧长的误差甚小,从而在相当高的精度范围内,提供了一种工程中适用并且简单易行的求解椭圆弧长的方法。 相似文献
15.
CALCULATION OF THE STRESS INTENSITY FACTOR AND ESTIMATION OF ITS ERROR BY A SHAPE SENSITIVITY ANALYSIS 总被引:1,自引:0,他引:1
J. Fuenmayor J. Domínguez E. Giner J. L. Oliver 《Fatigue & Fracture of Engineering Materials & Structures》1997,20(5):813-828
Abstract— The precision with which the stress intensity factor (SIF) can be calculated from a finite element solution depends essentially on the extraction method and on the discretization error. In this paper, the influence of the discretization error in the SIF calculation was studied and a method for estimating the resulting error was developed. The SIF calculation method used is based on a shape design sensitivity analysis; this assures that the resulting error in the extracted SIF depends solely on the global discretization error present in the finite element solution. Moreover, this method allows us to extend the Zienkiewicz-Zhu discretization error estimator to the SIF calculation. The reliability of the proposed method was analysed solving a two-dimensional problem using an h -adaptive process. Also the convergence of the error with the h -adaptive refinement was studied. 相似文献
16.
17.
18.
光扭矩传感器输出信号的直流电平漂移与控制 总被引:1,自引:0,他引:1
本文对光扭矩传感器输出信号中的直流电平漂移问题进行了讨论,分析了产生直流电平的原因,并提出了控制直流电平漂移的方法。 相似文献
19.
弯曲矩形板的广义位移解及其边界值 总被引:4,自引:0,他引:4
本文应用功的互等定理,给出了弯曲矩形板的广义位移解及其边界值.从广义位移解可导出在各种载荷作用下具有各种边界条件矩形板的弯曲位移公式.本文导出的广义位移解的边界值是求解各种复杂边界条件矩形板弯曲的理论基础. 相似文献
20.
探讨混凝土坝空间位移场的正反分析模型 总被引:2,自引:0,他引:2
本文应用场论和力学分析,提出了结合实测资料,建立坝体、坝基和库盘整体的空间位移场正反分析模型的方法,以及考虑因子相关与不相关两种情况时,提出了反演坝体、坝基和库盘分区分层与整体变形参数的方法.上述理论和方法已成功地应用于龙羊峡工程,解释了该坝蓄水以来运行中出现的变形疑点的成因. 相似文献