共查询到20条相似文献，搜索用时 911 毫秒
1.
王清明 《山东教育学院学报》2005,20(4):61-62
本文在研制的超精密车床上，提出了零件端面加工的误差在线测量与补偿原理，并建立了误差补偿控制系统，并进行了误差补偿实验，结果表明，所建立的误差补偿系统是可行的、非常有效的。 相似文献
2.
电阻应变片测量中温度误差的补偿方法 总被引：3，自引：0，他引：3
梁立凯 《呼伦贝尔学院学报》2001,9(1):68-69
电阻应变式传感器的实际工程中应用较广 ,但是由于温度变化引起应变片电阻变化对测量精度影响很大 ,本文对温度误差的产生及其补偿方法进行了分析。 相似文献
3.
翟飞 《南京广播电视大学学报》2003,(2):67-69
热电偶是一种较为理想的测温变换元件，但冷端温度随环境温度的变化会带来较大的附加误差，为提高测量精度，对热电偶冷端温度补偿十分重要。本提出了用微机实现冷端温度补偿的方法。 相似文献
4.
介绍一种ＡＤＣ组成的温度测量电路，对该电路在温度补偿中的原理和作用进行了论述和分析，该测量电路的特点是通过模数转换消除了温度误差，提高了温度补偿精度。 相似文献
5.
张传兵 《中学物理教学参考》2022,(35):57-59
在用光电门测量物体运动的瞬时速度时,采用条形挡光条模式会产生比较大的误差,原因是光敏管阈值导致挡光时间内滑块滑过的距离与挡光条宽度不相符,为获得准确结论,需要对挡光宽度进行误差修正。通过改变挡光条的宽度来测量做匀速直线运动的物体的速度,可测出光电门挡光宽度的误差修正值,理论和实践证明此测量方法和修正方法是可行的。 相似文献
6.
为提高轧机轧辊圆柱度误差测量的精度,简化测量手段,提出了激光测量方案并对测量结果进行了误差分析.采用激光测量轧辊的圆柱度误差精度高,装置简单,测量方便.在测量时选用的狭缝宽度越小,测量精度越高. 相似文献
7.
在分析数控加工误差来源的基础上,明确了几何误差的性质、产生原因及在各类误差源中所占的比重,着重介绍了三坐标测量仪的测量原理及特点,然后用一台五轴数控加工中心加工出一标准件,利用三坐标测量机对其生产零件进行误差测量及误差补偿,得到了预期的补偿效果。 相似文献
8.
9.
本文介绍的是一种利用微处理器技术测量电力系统电压、电流和功率的方法，仪器采用软件对测量结果进行实时的、在线的处理，可方便、快捷的处理，并可对各种算法实现误差的计算及补偿，使测量精度度大为提高。 相似文献
10.
通过钢筋位移混凝土保护层厚度的变化对混凝土受弯构件结构性能的影响进行定量分析结果表明,钢筋位移保护层厚度过大是造成混凝土结构性能的承载力下降、裂缝宽度超标、挠度超限的重要原因.从而导致混凝土结构存在安全隐患,影响工程结构的安全性、适用性和耐久性. 相似文献
11.
设计了一套机械可调式标定装置,基于该装置实验研究了3种摩擦副材质对超声测量精度的影响,并利用COMSOL Multiphysics仿真软件对实验结果进行了分析。结果表明:利用超声波探头得到的膜厚测量值相对误差普遍低于5%,说明探头测量精度较高;利用超声技术测量液体膜厚度时需考虑两侧摩擦副材质对测量精度的影响,两不锈钢板间的膜厚测量精度最高(最大相对误差为5.27%),而两PMMA板间的最低(最大相对误差为10.81%);此外,设计的机械可调式标定装置具有成本低、测量范围广、测量精度高等特点。 相似文献
12.
圆锥零件由于优异的安装和使用性能而在机械T业中应用广泛,但生产中圆锥度的检测并不精确．为了对零件的网锥度进行精确的检测,通过CCD摄像头采集锥形零件的图像,然后分别使用去背景法和阈值法对图像处理后进行拟合计算,从而得到锥形零件的圆锥度值．检测结果表明：采用的两种方法均得到零件较高精度的网锥度值,而采用阈值法处理后所得的图像较清晰,检测误差较小． 相似文献
13.
A system for measuring the quality parameters of elevator guide rails is developed. The quality parameters the system can measure include straightness, flatness, squareness, width and height of the rail. The system consists of six parts:main guideway, auxiliary guideway, reference rail, saddle, control casing and measured rail. The guide rail to be measured is mounted on a bed. The straightness errors of surfaces are checked by five linear displacement sensors mounted on the saddle. The deviation of readings from the sensor, which is in contact with top guiding surface, gives the straightness error of the surface and height of the rail. The other four sensors are used to measure side guiding surfaces respectively and give other parameters including flatness on the surfaces, squareness, width and height of the rail. A novel calibration method is also developed to calibrate the straightness motion error of the system in horizontal and vertical directions. The deflection deformation of the measured rail is fitted by using a fourth-order polynomial. Experimental results show that the uncertainty of the system on the side surfaces after compensating the straightness motion error is less than 0. 01 mm, and the uncertainty of the system on the top surface after compensating the straightness motion error and the deflection deformation of the rail is less than 0.03 mm. 相似文献
14.
To analyze the effects of width and thickness of each composition element of mixed steel U-rib-stiffened plates on the welding residual stress distribution, the distribution of the U-rib and the plate residual stress was calculated using a simplified calculation method. The method involved welding the mixed steel U-rib-stiffened plates for a structure with different sizes and different strength ratios of U-rib to plate. Based on a welding residual stress numerical simulation method validated by the blind hole method test, the distribution law of the mixed steel U-rib stiffened plate was studied. The results showed that the change of plate width has little impact on the welding residual stress and that the ratio of the thicknesses of the plate to U-rib stiffeners, the thickness of the plate, and the thickness of the U-rib has a great influence on the distribution of the welding residual stress. The thickness of plate and steel strength also greatly influenced the distribution width of the residual tensile stress. While analyzing the compression capacity of U-rib-stiffened plates, the simplified distribution of welding residual stress was used. 相似文献
15.
WU Jun LIU Jingbo DU Yixin 《天津大学学报(英文版)》2006,12(B09):161-164
The injury of gunners caused by muzzle shock-wave has always been a great problem when firing inside the protective cover. The distribution regularity and personnel injury from the muzzle blast-wave were investigated by both test and numerical simulation. Through the inside firing test, the changes of overpressure and noise have been measured at different measuring points in the thin-wall cover structure with different open widths and shallow covering thickness. The distribution regularity of muzzle shock-wave with different firing port widths is calculated by ANSYS/LS- DYNA software. The overpressure distribution curves of muzzle shock-wave inside the structure can be obtained by comparing the test results with the numerical results. Then, the influence of open width and shallow covering thickness is proposed to give a reference to the protective design under the condition of the inside firing with the same cannon caliber. 相似文献
16.
The injury of gunners caused by muzzle shock-wave has always been a great problem when firing inside the protective cover. The distribution regularity and personnel injury from the muzzle blast-wave were investigated by both test and numerical simulation. Through the inside firing test, the changes of overpressure and noise have been measured at different measuring points in the thin-wall cover structure with different open widths and shallow covering thickness. The distribution regularity of muzzle shock-wave with different firing port widths is calculated by ANSYS/LSDYNA software. The overpressure distribution curves of muzzle shock-wave inside the structure can be obtained by comparing the test results with the numerical results. Then, the influence of open width and shallow covering thickness is proposed to give a reference to the protective design under the condition of the inside firing with the same cannon caliber. 相似文献
17.
提出了一种能校正系差的检测控制系统,当被测物理量能被定义为"低速变化物理量"时,利用误差理论对被测信号数据进行数据处理,可以达到用低精度采集系统进行高精度采集的目的。 相似文献
18.
Ye Zhiming 《上海大学学报(英文版)》1998,2(1):27-34
ＮｏｎｌｉｎｅａｒＶｉｂｒａｔｉｏｎｏｆＣｉｒｃｕｌａｒＰｌａｔｅｗｉｔｈＶａｒｉａｂｌｅＴｈｉｃｋｎｅｓＹｅＺｈｉｍｉｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ）ＡｂｓｔｒａｃｔＴｈｉｓ... 相似文献
19.
该文分析了HL1型夫兰克-赫兹（简称F—H）实验仪在设计上存在的2个问题：无法测出高激发电位；存在一个由消耗电压与接触电势差导致的系统误差。通过与其它类型仪器作比较，兼顾其它仪器与这种仪器的优点，提出了改进方案。这样，既可测出高激发电位，又可精确测出第一激发电位，同时补偿了消耗电压与接触电势差的影响。 相似文献
20.
热电偶冷端温度硬件补偿方法 总被引：1，自引：0，他引：1
测温过程中，要使热电势和所测温度是单值函数关系，必须进行冷端温度补偿．中介绍了几种硬件冷端补偿方法及其原理．实际应用表明此方法具有电路简单、可靠性高等特点． 相似文献