公开(公告)号：US08947823B1

公开(公告)日：2015-02-03

申请号：US14199269

申请日：2014-03-06

申请人： Marvell International Ltd.

发明人： Rathnakumar Radhakrishnan ,  Michael Madden

IPC分类号： G11B21/02 ,  G11B5/60

CPC分类号： G11B5/6076 ,  G11B5/6029

摘要： A method of detecting head touchdown in a storage device includes monitoring storage device head contact sensor signals, and processing the monitored storage device head contact sensor signals in a digital domain. The processing may occur in a data path of the storage device, such as the read channel of the storage device. The processing may monitor for head touchdown only during other than read operations. Further, during servo read operation, the storage device head contact sensor may continue to generate signals, and the storage device head contact sensor signals may be squelched. Storage device head contact sensor signals also may be squelched during intervals before and after the servo read operation. The processing may includes accumulating a moving sum of squares of the storage device head contact sensor signals, and comparing the moving sum of squares of the storage device head contact sensor signals to a threshold.

摘要翻译： 一种在存储装置中检测磁头触地的方法包括监视存储装置磁头接触传感器信号，以及在数字域中处理所监视的存储装置磁头接触传感器信号。 处理可以在存储设备的数据路径中发生，诸如存储设备的读取通道。 处理可以仅在读取操作期间监视头部触地。 此外，在伺服读取操作期间，存储装置头接触传感器可以继续产生信号，并且存储装置头接触传感器信号可能被压扁。 存储设备头接触传感器信号也可以在伺服读取操作之前和之后的间隔期间被压扁。 处理可以包括累积存储装置头接触传感器信号的移动移动的平方和，并将存储装置头部接触传感器信号的移动移动和的平方值与阈值进行比较。