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；
The principle of measurement is as follows: a probe, which features a transmitter and receiver of red and infrared light, is positioned to transilluminate a pulsatile arteriolar bed.
测量原理如下：一个传送和接收红光和红外光的探针放置并透照搏动的微动脉床。
The first part is the introduction of high precision inductance probe, including measure principle and measure circuit.
第一部分是对高精度电感测头的介绍，包括其测量原理及测量电路。
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