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互锁.
互锁(interlock)是指两种设备或机制互相依赖,以阻止不期望的状态出现。用于防护操作员、设备安全。实现方法如红外线、光幕、计算机上的互锁程序、数字电路或模拟电路等等。
例如,电梯的互锁:在运行时电梯门不能打开;电梯门打开时电梯不能启动运行。而微波炉打开时就自动停止微波加热,这个不能算是互锁。
CPU的互锁机制通过向指令流水线插入bubble以避开检测到的危险。例如,软件程序从系统总线载入数据并指示系统在下个周期处理该数据,但实际载入数据需要多个周期(load-to-use危险)。
主要电源与备用电源的自动切换装置也是一种互锁设备。[1][2]
参考文献
- ^ A Sample Lockout/Tagout Procedure (PDF). bwc.ohio.gov. Ohio Bureau of Workers' Compensation: Division of Safety and Hygiene. [24 March 2015]. (原始内容存档 (PDF)于2020-09-21).
- ^ Harry Fraser, The electric kiln: a user's manual 2nd edition, University of Pennsylvania Press, 2000,page 41
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