公开(公告)号：DE3378435D1

公开(公告)日：1988-12-15

申请号：DE3378435

申请日：1983-07-04

Applicant: IBM

Inventor： FRATER NORMAN KERMIT ,  HOO STANLEY SHU-KU ,  HARLOW MCCONNELL WILLIAM

IPC: G01B7/14 ,  G11B5/60 ,  G11B5/708 ,  G11B21/20 ,  G11B21/21 ,  G11B33/10

Abstract: Intermittent contacts between a flying transducer head and a magnetic record medium are monitored by detecting triboelectric charges generated by such contacts. Different amounts and polarities of triboelectric charge are generated by different materials on the surface of the record medium. … The flight of the head when it is out of contact with the record medium can be monitored by detecting variations in the displacement current generated as the head flies over the record medium.