查询词典 impedance coil

The impedance of a probe-coil above a conductive plate with finite thickness was derived and expressed in series expansion,and then the impedance characteristics of the coil due to lift-off variation were analyzed.

推导了线圈置于有限厚度的金属平板上方时其阻抗计算的级数表达式，并以此为基础分析了由线圈的提离改变所引起的线圈阻抗的变化特征。

One of these testing methods, eddy current, has been widely used for metal thickness measuring because of its good sensitivity, high test speed , non-contact and other advantage. The principle of eddy current testing is that, when the test coil is close to the metal conductor with alternating current, the eddy current would be inducing in the conductor, and correspongdingly, the eddy current would affect the original magnetic field, the result is the coils impedance and inducing voltage changed.

其中涡流无损检测技术具有灵敏度高、检测速度快、非接触等特点而广泛应用于金属厚度检测，它的原理是当载有交变电流的检测线圈靠近金属导体时在导体中产生涡流，该涡流又影响原磁场，使得线圈的阻抗和感应电压发生变化，通过分析阻抗或感应电压的变化来获得被测导体的信息。

For three different detected surfaces—concave, plane and convexity, the relevant finite element models of three-dimensional eddy current field problem have been built. The surface shape, curvature radius and lift-off variation effects on coil's reflected impedance have been analyzed.

针对3类检测表面，建立对应的三维涡流场问题的有限元模型，计算分析了检测表面形状、曲率半径大小以及提离变化对线圈反射阻抗的影响。

Secondly, the relationship between the coil impedance and its liftoff for different materials are obtained using separation of variables and numerical calculation methods.

为考察电涡流传感器中等效电路的适用性，本文从被测体材料角度出发，在分析等效电路基础上，采用分离变量法和数值计算法，得到不同被测材料下探头线圈阻抗与提离高度的关系，并与从等效电路得出的结论比较，确定等效电路的适用性，同时考察被测体厚度对线圈阻抗的影响，最后对得出的结论进行理论分析。

For the Q of a coil. most measurements, R will be about 0.10 X and should have a voltage of 0.1 V. Most oscillators cannot be operated into this low impedance, so a step-down matching transformer must be employed.

为Q的线圈。最测量， R将约为0.10 X和应该有一个电压为0.1诉最振荡器不能经营成本低阻抗特性，所以下台的配套变压器必须被雇用。

Power handling of 20 Watts RMS, a voice coil impedance of 15 Ohms and a crossover point of 1 kHz.

功率处理能力20额定功率，15欧姆和1千赫的交叉点音圈阻抗。

A plasma generation apparatus includes: a chamber having a chamber lid and defining an airtight reaction region; a susceptor in the chamber; a gas supply means supplying a process gas to the chamber; and a toroidal core vertically disposed with respect to the susceptor through the chamber lid, comprising: a toroidal ferromagnetic core combined with the chamber, the toroidal ferromagnetic core having a first portion outside the chamber and a second portion inside the chamber, the second portion having an opening portion; a radio frequency power supply connected to the chamber; an induction coil electrically connected to the RF power supply, the induction coil rolling the first portion; and a matching circuit matching an impedance between the RF power supply and the induction coil.

一种等离子体产生装置包括：一腔室，其具有一腔室盖并界定一气密反应区域；一在所述腔室中的基座；一气体供应构件，其将一制程气体供应到所述腔室；和一环形铁芯，其穿过所述腔室盖相对于所述基座垂直设置，所述环形铁芯包含：一与所述腔室相组合的环形铁磁芯，所述环形铁磁芯具有一在所述腔室外的第一部分和一在所述腔室内的第二部分，所述第二部分具有一开口部分；一连接到所述腔室的射频电源；一电连接到所述RF电源的感应线圈，所述感应线圈卷绕所述第一部分；和一匹配电路，其匹配所述RF电源与所述感应线圈之间的一阻抗。

Impedance analytical method is presented, through which we analyze some factors that alter testing coil impedance's value.

阐述了阻抗分析法，并用其分析了影响检测线圈阻抗变化的几个因素。

We call it today was optimum only for a low impedance coil.

只对低阻抗线圈的最佳。

When wirerope as electromagnetic induction iron core cross-sectional area changes, the coupled impedance between exciting coil and testing coil will change

钢丝绳作为电感铁芯，当其截面发生变化时励磁线圈与检测线圈之间的偶合阻抗将改变

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了