Pit detection using a contact sensor

J. Xu; Y. Shimizu; J. Liu; T. Shiramatsu; M. Furukawa; J. Li; H. Kohira

doi:10.1109/TMAG.2013.2251867

Pit detection using a contact sensor

J. Xu, Y. Shimizu, J. Liu, T. Shiramatsu, M. Furukawa, J. Li, H. Kohira

ENG - Finemechanics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Pit detection study of a thermal contact sensor was carried out by both experiments and simulation. The experimental results showed that the thermal contact sensor was able to detect a small pit with fairly good sensitivity. And the simulation study revealed that the mechanism of pit detection is due to worse cooling, which results in higher sensor temperature, because the sensor/disk spacing is larger on the pit compared with at nominal flying state. And the temperature increase of sensor can be attributed to worse heat flux due to both larger spacing and air-bearing pressure drop when the sensor is above the pit.

Original language	English
Article number	6522227
Pages (from-to)	2715-2718
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	49
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2013.2251867
Publication status	Published - 2013 Jun 14

Keywords

Contact sensor
disk defect
head disk interface

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2013.2251867

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AU - Xu, J.

AU - Shimizu, Y.

AU - Liu, J.

AU - Shiramatsu, T.

AU - Furukawa, M.

AU - Li, J.

AU - Kohira, H.

PY - 2013/6/14

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N2 - Pit detection study of a thermal contact sensor was carried out by both experiments and simulation. The experimental results showed that the thermal contact sensor was able to detect a small pit with fairly good sensitivity. And the simulation study revealed that the mechanism of pit detection is due to worse cooling, which results in higher sensor temperature, because the sensor/disk spacing is larger on the pit compared with at nominal flying state. And the temperature increase of sensor can be attributed to worse heat flux due to both larger spacing and air-bearing pressure drop when the sensor is above the pit.

AB - Pit detection study of a thermal contact sensor was carried out by both experiments and simulation. The experimental results showed that the thermal contact sensor was able to detect a small pit with fairly good sensitivity. And the simulation study revealed that the mechanism of pit detection is due to worse cooling, which results in higher sensor temperature, because the sensor/disk spacing is larger on the pit compared with at nominal flying state. And the temperature increase of sensor can be attributed to worse heat flux due to both larger spacing and air-bearing pressure drop when the sensor is above the pit.

KW - Contact sensor

KW - disk defect

KW - head disk interface

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Pit detection using a contact sensor

Abstract

Keywords

ASJC Scopus subject areas

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