The difference among three reference standards used in the performance evaluation of wire rope EMT instrument
نویسندگان
چکیده
A reference standard for a unit of measurement is an artifact that embodies the quantity of interest in a way that ties its value to the reference base. The selection of an appropriate reference standard is a crucial point in the performance evaluation of wire rope electromagnetic testing (EMT) instrument. In this paper, a 3-D finite element model (FEM) has been developed to study three reference standards. The effects of the magnetizing ampere-turn, the loss of metallic cross-sectional area on the main magnetic flux and the structure have been addressed. Comparison analyses have been made of the simulation results of the three reference standards.
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