磁盘高速运行过程中磁头运行状态的监测方法

doi:10.3901/JME.2018.05.228

机械工程学报 ›› 2018, Vol. 54 ›› Issue (5): 228-232.doi: 10.3901/JME.2018.05.228

• 数字化设计与制造 • 上一篇

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磁盘高速运行过程中磁头运行状态的监测方法

石德全, 康凯娇, 高桂丽

哈尔滨理工大学材料科学与工程学院哈尔滨 150040

收稿日期:2017-04-11 修回日期:2017-10-18 出版日期:2018-03-05 发布日期:2018-03-05
通讯作者: 石德全(通信作者),男,1977年出生,博士,教授。主要研究方向为材料加工工程自动检测与控制。E-mail:shidequan2008@163.com
作者简介:康凯娇,女,1992年出生,博士研究生。主要研究方向为无损检测。E-mail:972460833i@qq.com;高桂丽,女,1979年出生,博士,副教授。主要研究方向为无损检测。E-mail:gao-guili@163.com

Method of Monitoring the Working Status of the Magnetic Head during High Speed Revolution of Hard Disk

SHI Dequan, KANG Kaijiao, GAO Guili

School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040

Received:2017-04-11 Revised:2017-10-18 Online:2018-03-05 Published:2018-03-05

摘要/Abstract

摘要： 随着磁头磁盘间有效距离的不断降低，磁头可能以飞行、冲浪和滑行三种状态工作，为了使磁头能够稳定工作，必须实时监测和识别磁头所处的状态。提出一种利用摩擦电流来实时监测磁头工作状态的方法。利用空气轴承电动机、热飞高控制磁头、功率加载控制单元、静电计、加载/卸载单元、静电屏蔽箱等组建了摩擦电流的测试系统。通过每隔0.1 V逐步给飞高控制磁头加载电压的方式，改变磁头磁盘间的距离，测量了不同磁头磁盘间距时的摩擦电流，得出了区分三种工作状态的摩擦电流区间。当摩擦电流值在10^-4μA以下时，磁头工作在稳定的飞行状态；当摩擦电流值在6～50 μA时，磁头工作在冲浪状态；当摩擦电流值在140 μA以上时，磁头工作在滑行状态。

关键词: 磁头, 摩擦电流, 硬盘, 运行状态

Abstract: With the gradual decrease of the effective clearance between the hard disk and the magnetic head, the head may work at three states-flying, surfing and sliding. In order to make the head stable working, the state of the head must be monitored and identified. A method is given to real-time monitor the state of the head by measuring the tribocurrent resulting from the friction between the disk and the head. A tribocurrent measurement system is constructed which includes air bearing motor, thermal-flight-height-control head, power loading control unit, electrometer, loading/unloading unit, electrostatic shielding box and so on. By applying the voltage to the thermal-flight-height-control head with the step of 0.1 V, the clearance between the hard disk and the head is gradually decreased, and the tribocurrent at different clearance was measured by the electrometer, and the current range of distinguishing three working states of the head is obtained. When the tribocurrent is below 10^-4 μA, the head works stably at the flying state. When the tribocurrent is at 6 μA-50 μA, it works at the surfing state. When the tribocurrent is more than 140 μA, it works at the sliding state.

Key words: hard disk, magnetic head, tribocurrent, working status

中图分类号:

TH12

石德全, 康凯娇, 高桂丽. 磁盘高速运行过程中磁头运行状态的监测方法[J]. 机械工程学报, 2018, 54(5): 228-232.

SHI Dequan, KANG Kaijiao, GAO Guili. Method of Monitoring the Working Status of the Magnetic Head during High Speed Revolution of Hard Disk[J]. Journal of Mechanical Engineering, 2018, 54(5): 228-232.

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磁盘高速运行过程中磁头运行状态的监测方法

Method of Monitoring the Working Status of the Magnetic Head during High Speed Revolution of Hard Disk

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