Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland.
Sensors (Basel). 2023 Mar 20;23(6):3267. doi: 10.3390/s23063267.
This paper presents a practical way of using the method of evaluating the metrological properties of eddy current sensors. The idea of the proposed approach consists of employing a mathematical model of an ideal filamentary coil to determine equivalent parameters of the sensor and sensitivity coefficients of tested physical quantities. These parameters were determined on the basis of the measured value of the real sensor's impedance. The measurements were carried out with an air-core sensor and an I-core sensor while they were positioned at different distances from the surface of tested copper and bronze plates. An analysis of the influence of the coil's position in relation to the I core on the equivalent parameters was also carried out, and the interpretation of the results obtained for various sensor configurations was presented in a graphical form. When equivalent parameters and sensitivity coefficients of examined physical quantities are known, it is possible to compare even very different sensors with the employment of one measure. The proposed approach makes it possible to make a significant simplification of the mechanisms of calibration of conductometers and defectoscopes, computer simulation of eddy current tests, creating the scale of a measuring device, and designing sensors.
本文提出了一种实用的方法，用于评估电涡流传感器的计量性能。该方法的思路包括采用理想线状线圈的数学模型来确定传感器的等效参数和被测物理量的灵敏度系数。这些参数是根据实际传感器阻抗的测量值来确定的。测量是在空气芯传感器和 I 芯传感器上进行的，同时它们被放置在距被测铜和青铜板表面的不同距离处。还对线圈相对于 I 芯的位置对等效参数的影响进行了分析，并以图形形式呈现了各种传感器配置下的结果解释。当知道等效参数和被测物理量的灵敏度系数时，即使使用一个测量值，也可以对非常不同的传感器进行比较。所提出的方法使得对电导率计和探伤仪的校准机制、电涡流测试的计算机模拟、测量装置的标度以及传感器的设计进行显著简化成为可能。
