公开(公告)号：KR100761998B1

公开(公告)日：2007-09-28

申请号：KR1020060073260

申请日：2006-08-03

Applicant: 조선대학교산학협력단

Inventor： 이진이 ,  송하용 ,  전종우 ,  황지성

IPC: G01R31/00

CPC classification number: G01R33/1215 ,  G01N27/82 ,  G01R33/0094 ,  G01R33/09

Abstract: A defect detecting device securing enhanced detecting ability is provided to increase SNR(Signal-to-Noise Ratio) of signals output from a magnetic sensor array by using an amplifying unit and a filtering unit. A defect detecting device securing enhanced detecting ability is composed of a magnetic sensor array(221) detecting the leak magnetic flux generated from a defective part of an object magnetized by a magnetic source; an amplifying unit(222) amplifying the signals output from the magnetic sensor array and outputting the amplified signals; a filtering unit(223) filtering and outputting the signals output from the amplifying unit; a selection unit(224) selectively outputting the signals output from the filtering unit and corresponding to an output selection signal having the predetermined number of bits; a conversion unit(225) converting an analog data signal output from the selection unit, into a digital data signal; a storing unit(226) storing the digital data signal; and a CPU(Central Processing Unit)(227) removing noise included in the digital data signal by software, generating a display data signal indicating difference among outputs of magnetic sensors adjacent to each other in a magnetization direction, and then outputting the display data signal to a display device(215).

Abstract translation: 提供确保增强的检测能力的缺陷检测装置，以通过使用放大单元和滤波单元来增加从磁传感器阵列输出的信号的SNR（信噪比）。 确保增强的检测能力的缺陷检测装置由检测从由磁源磁化的物体的缺陷部分产生的泄漏磁通的磁传感器阵列（221）组成; 放大单元，放大从磁传感器阵列输出的信号并输出​​放大的信号; 滤波单元（223），滤波并输出从放大单元输出的信号; 选择单元（224），选择性地输出从所述滤波单元输出并对应于具有所述预定位数的输出选择信号的信号; 将从所述选择单元输出的模拟数据信号转换为数字数据信号的转换单元（225）; 存储单元（226），存储数字数据信号; 以及通过软件去除包含在数字数据信号中的噪声的CPU（中央处理单元）（227），产生指示在磁化方向上彼此相邻的磁传感器的输出之间的差异的显示数据信号，然后输出显示数据信号 到显示装置（215）。