Research of aluminium alloys with use of subminiature eddy current transducers

Innovations and Prospects of Development of Mining Machinery and Electrical Engineering

矿业工程;电工学

Malikov, V.N.^1 ; Dmitriev, S.F.^1 ; Ishkov, A.V.^2 ; Katasonov, A.O.^1 ; Sagalakov, A.M.^1

Altay State University, 61, Lenina Av., Barnaul

656049, Russia^1

Altay State Agrarian University, 98, Krasnoarmeyskiy Av., Barnaul

656049, Russia^2

关键词: Aluminum;    Magnesium alloys;    Eddy current transducers;    Measuring systems;    Operating frequency;    Signal frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/87/8/082031/pdf
DOI  :  10.1088/1755-1315/87/8/082031

来源: IOP

【 摘 要 】

The measuring system based on subminiature eddy-current transducers has been developed to carry out local investigations of aluminum-magnesium alloy plates for flaws. The Delianna filter has been modified to allow the significant increase of signal-to-noise ratio. A scheme that uses a computer as a generator and receiver of signals from windings is proposed. It is capable of automatically changing the filtering cutoff frequency and operating frequency of the device. The transducer has been tested on a number of aluminum-magnesium alloy plates with flaws. The article presents data on the relationship of eddy-current transducer response to the presence of flaws in alloys as hidden holes at signal frequencies comprised between 300÷700 Hz on an exciting winding.