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。
In the thesis, the relativity of tested material and ECS is studied by controlling the real part and the image part of the impedance of the coil. 本论文尝试采用对探头线圈的阻抗实部和虚部进行控制的方法,来研究在新的理论下电涡流传感器与被测材料的相关性。
The basic principle of eddy current testing is introduced and the coil impedance responses due to the variations of the probe coil lift-off are analyzed and studied. 简要介绍了涡流检测的基本原理和涡流探头的特性;分析和研究了涡流检测探头提离变化对阻抗的影响;
Temperature drift of eddy current sensor ( ECS) mainly results from the impedance of measurement coil under great variation in temperature. 大温差环境下检测线圈阻抗是导致传感器输出漂移的主要环节。
Calculation of Impedance in an Eddy-Current Coil by Numerical Integration Method 涡流线圈的阻抗计算
In this paper, an numerical model for calculating impedance increment of air-cored probe coil detecting homogeneous conducting half-space with arbitrary shape three-dimension flaws was studied. A method of volume integral equation with semi-analytic form to calculating impedance increment was presented. 本文研究了均匀半空间导体内含有任意形状三维缺陷时放置式线圈阻抗增量的数值模型,提出了一种计算阻抗增量的半解析体积分方程法。
This thesis presents the application of improved Genetic algorithm to reconstruct the conductivity distribution of stratified biological tissue by measuring the change of impedance in the coil. 本文主要研究在载流线圈作用下,通过测量生物组织产生的二次场对线圈阻抗的改变,应用改进的遗传算法重构分层生物组织各层电导率和厚度的方法。
Determination of the Impedance Integral Limits for Air-cored Probe Coil 放置式线圈阻抗积分限的确定
In this paper, the integrand function of the impedance integral for air-cored probe coil is studied and the problem of the determination for the integral limits is resolved. 本文研究了涡流检测中放置式线圈阻抗积分的被积函数性态,解决了积分限的确定问题。
Generator neutral ground methods include non-ground, low impedance ground, high impedance ground and arc-suppression coil ground. 发电机中性点运行方式有中性点不接地、小阻抗接地、高阻抗接地、消弧线圈接地。
Study on Magnetic Impedance Effect in Amorphous Wire Micro Magnetization Coil 非晶丝微磁化线圈磁电阻抗效应研究
The impedance of single coil is calculated using analytic method, and the result is compared with that calculated by 2D FEM model. 利用解析方法计算了空芯线圈的阻抗,然后通过二维有限元模型进行了阻抗求解,对比结果有较好的一致性。
ET can test surface cracks by testing the change of impedance when the testing coil is near the tested object. 电涡流检测是利用探头线圈靠近被测物体时阻抗发生的变化来检测裂纹的。
Since the wave impedance of variable frequency motor being significantly greater than the wave impedance of the cable, making variable frequency motor suffer approximately the twice of pulse leading edge voltage, the coil insulation layer of variable frequency motor occurs partial discharge during operation. 由于变频电机的波阻抗明显大于电缆的波阻抗,使得变频电机受到约两倍的脉冲前沿电压,导致变频电机线圈绝缘层在运行过程中发生局部放电。