Detection system of magnetic permeability for ferrite core by induction formula of magnetic field

摘要

PURPOSE: A system is provided to achieve improved yield rate and reliability by easily checking defects of the produced ferrite core through the comparison with the reference ferrite core. CONSTITUTION: A system comprises an oscillation unit(10) for generating an AC power of a preset frequency band; a magnetic permeability detection unit(20) for taking, as an input, the AC power oscillated from the oscillation unit, and detecting the degree of changes of the magnetic field passing through the objective ferrite core; an amplifier(30) for taking, as an input, values from the magnetic permeability detection unit, and amplifying the received values; a digital signal generating unit including a root mean square(50) and an ADC(60), wherein the digital signal generating unit receives the signals amplified by the amplifier, converts the received signals into a digital signal, and outputs the digital signal; and a computer(70) for displaying, on a monitor, the data output from the digital signal generating unit, and storing the relevant data if needed.