查询词典 phase shifting

A technique named eight-step phase shifting technique is presented to solve the problem of isoclinic fringe pattern influenced by isochromatic fringe patterns of integer order and half-integer order.

本文以相移法为实现数字光弹性法的基础，针对Patterson和Wang的光弹性六步相移法中等倾线信息受到整数和半数级等差线的影响，提出了八步相移法。

On the basis of color imaging system, an automated photoelasticity in white light for determining isochromatics and isoclinics is presented It includes two techniques One is automation of the ordering of color isochromatics based on BP neural network The other is whole field digital determining of isoclinic angles by five step color phase shifting Many limitations and drawbacks, which affect the precision of measurement, were more eliminated and improved The validity of experimental results was ...

以彩色信息图象处理技术为基础，围绕光弹性实验数据自动采集这个主题，提出用BP神经网络自动确定等色线分数级条纹及其级数的颜色插值法，以及全场数字化确定等倾角的五步彩色相移法。典型实验表明，上述方法在提高光弹性数据采集自动化程度和减少各种误差因素影响等方面均有所改善；进而提高三维光弹性薄切片应力分析结果的精度，促进实验应力分析的工程应用，扩大光弹性法的应用范围。

In chapter 3, the principle of phase—shifting metrology and base of parameters decision are studied.

第三章讨论了相移干涉计量术的原理及一些参数选择依据。

The phase shifting of the inner reflecting light from the incline of ZF-7 prism is measured and its positive or negative sign can be judged, which is consistent with the theoretical result.

测量了ZF-7光学玻璃直角三棱镜斜面上内反射的相移，实验结果和理论计算吻合。同时给出了判断相移正、负的方法。

Phase shifting interferometry has been widely used and accepted as a fast and accurate non-contact metrology tool. It is widely used to test optical element, optical system, and to detect optical surface and some physical parameter(such as temperature field, density field) related with optical path difference.

移相干涉术作为快速、非接触的精密测量手段，已经广泛地应用于光学零件、光学系统、精密表面的检测和其它与光程差参数相关的物理量的测量。

Based on the eight-step phase shifting technique, three methods to determining the first principal stress direction of the slice are discussed.

在光弹性八步相移法的基础上，提出了确定模型切片的第一主应力方向的三种方法。

In this dissertation, high-speed CCD camera was used as the image system. An eight-wave retardation plate was added within the optical path to remove the phase shifting device. By means of short exposure time and precise time sequency control, transient information in a series of time scales could be obtained successfully.

本研究承续前人的努力采用高速CCD为取像系统，但改於光路中加入八分之一波板於光路中来取代传统的相移机构，再藉由极短的曝光时间和时序控制成功取得了振动物体一系列连续时间点之暂态资讯。

In chapter 3, the principle and method of Phase-Shifting Digital Speckle Pattern Intei-ferometry are studied.

第三章讨论了相移数字散斑干涉计量技术的原理和方法，并对相移求解方法及精度进行了详细的讨论。

The composition voltage, the electric current double closed loop voltage-stabilized source, used the integrated phase shifting crystal thyratron module to do for the electrical energy transformation component, in detail has calculated the rectification main circuit main component parameter; In the pulse-duration modulation part, used the special-purpose integrated circuit to realize the frequency modulation to adjust the pressure, did take IGBT as the power transformation component, realized the output voltage frequency modulation to adjust the pressure, and has calculated the related parameter.

在调压稳压电压源设计中采用二阶工程设计法设计了电压和电流调节器，组成电压、电流双闭环稳压电源，采用集成移相晶闸管模块做为电能变换器件，详细计算了整流主电路主要器件的参数；在脉宽调制部分，采用专用集成电路实现了调频调压，以 IGBT 做为功率变换器件，实现了输出电压的调频调压，并计算了有关参数。

The locomotive adopts chopper main circuit of 4 uncombined phases and a control mode featuring accessory pulse generated firstly, main pulse secondly, and central phase shifting of the 4 phases.

该车采用了4相不重的斩波主电路和先发副脉冲、后发主脉冲及4相集中移相的控制方式，并特别试制了适用于斩波的滤波电容器及换相电容器。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。