公开(公告)号：US3688287A

公开(公告)日：1972-08-29

申请号：US3688287D

申请日：1970-08-24

申请人： TEXAS INSTRUMENTS INC

发明人： PERRY RALPH S

IPC分类号： G11B5/60 ,  G11B17/32 ,  G08B21/00 ,  G11B19/08

CPC分类号： G11B5/6005 ,  G11B17/32

摘要： In a computer a memory system is provided which comprises a plurality of rotating disc type magnetic memory elements mounted upon a motor driven shaft. The magnetic discs are designed to store information in the form of magnetic bits on two sides. Faulty areas are located on the discs and bypassed by switching to another disc on a sector basis to ensure computer reliability. The disc memory elements receive information from a plurality of read-write heads which during normal operation are in flying association with the discs. For each memory disc, there is a yoke assembly which includes a plurality of read-write heads spring connected to a yoke which is supported over each magnetic memory disc. The computer memory system includes an ultrasonic collision detector to detect during operation damaging hits or collisions between a memory disc and an aerodynamically unstable head. For disc-head collision detection, a piezoelectric ceramic element is attached to each disc yoke to detect vibrations and, in particular, those occurring when any element of a head comes in contact with a memory disc. The vibrating frequencies of the piezoelectric ceramics are converted to electrical signals, amplified and passed through Tschebyscheff filters to eliminate normal operating frequencies detected by the ceramics and to pass memory element damaging frequencies to a second amplifier. The second amplifier has two outputs - one output to an analog multiplexer to provide on an oscilloscope a look at each memory disc operating to determine the nature of the collision, and a second output to a detector where the signal inputs are compared and an indicator lamp actuated to indicate which memory element is in contact with the head and to actuate a relay to open a master switch to shut down the computer memory system.

摘要翻译： 在计算机中，提供了一种存储系统，其包括安装在电机驱动轴上的多个旋转盘式磁存储元件。 磁盘被设计成以两侧的磁头的形式存储信息。 故障区域位于光盘上，并以扇区为基础切换到另一个光盘旁路，以确保计算机的可靠性。 盘存储器元件从正常操作中与盘相关联的多个读写头接收信息。 对于每个存储盘，存在轭组件，其包括连接到支架在每个磁存储盘上的磁轭的多个读写头弹簧。 计算机存储器系统包括超声波碰撞检测器，用于在操作期间检测损坏记录盘和空气动力学不稳定头部之间的碰撞或碰撞。 对于盘头碰撞检测，将压电陶瓷元件附接到每个盘形磁轭以检测振动，特别是当头部的任何元件与存储盘接触时发生的振动。 将压电陶瓷的振动频率转换为电信号，放大并通过Tschebyscheff滤波器，以消除陶瓷检测到的正常工作频率，并将存储元件损坏频率传递给第二放大器。 第二放大器具有两个输出 - 一个输出到模拟多路复用器，以在示波器上提供操作以确定碰撞性质的每个存储盘，以及将信号输入进行比较的检测器的第二输出和指示灯 启动以指示哪个存储元件与头接触并且致动继电器以打开主开关以关闭计算机存储器系统。