发明名称 |
MAGNETIC CURRENT SENSING AND SHORT CIRCUIT DETECTION IN PLATE STRUCTURE |
摘要 |
<p>A device (16) for sensing current flowing in a generally flat plate structure (10) contains a magnetic head (18) and signal processing circuitry (20). The magnetic head (a) senses changes in current-induced magnetic flux as the head is positioned over the plate structure and (b) provides a head output signal. The signal processing circuitry processes the head output signal to produce a data signal indicative of how much current appears to flow in the plate structure below the head. A driving voltage, which typically varies in a periodic manner to produce a characteristic signature, is applied to a primary conductor in the plate structure. When the plate structure contains a group of first electrical conductors (32) that are nominally electrically insulated from and cross a group of second electrical conductors (48), a probability analysis technique is typically performed on magnetically obtained current data to detect short circuit defects in the plate structure.</p> |
申请公布号 |
EP1004027(A4) |
申请公布日期 |
2001.05.09 |
申请号 |
EP19980934613 |
申请日期 |
1998.07.24 |
申请人 |
CANDESCENT TECHNOLOGIES CORPORATION |
发明人 |
FIELD, JOHN, E.;OBERG, STEPHANIE, J. |
分类号 |
G01R31/02;G01R15/20;G01R19/00;G09G3/00;H01J9/42;H05K3/00;(IPC1-7):G01R31/315;G01R15/18;G01R31/28 |
主分类号 |
G01R31/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|