signal n. 1.信号,暗号;信号器。 2.动机,导火线 (for)。 3.预兆,征象。 call signal 【无线电】呼号。 an alarm signal 警报(器)。 an information signal 〔美国〕暴风警报(旗)。 an international code of signals 国际通用信号。 a signal of distress =a distress signal 船只失事信号。 adj. 1.暗号的,作信号用的。 2.显著的,非常的,优越的。 a signal victory [defeat] 大胜[败]。 vt.,vi. (〔英国〕 -ll-) 发信号[警报]给(人、船等);用信号[警报]通知(暴风、危险等);用动作[手势]示意;预示。 a signaling bomb 信号弹。
In this paper , the control system of rectifying strip steel deviation based on ppf control algorithm is designed , and a way of detecting the deviation signal of strip steel is introduced , which adopted redundancy control that involves capacitance sensor and highfrequency photoelectricity sensor , and improved reliability of the system . the system includes : siemens s7 200 programmabled logic controller , em235 analog signal module expanded , td200 for manipulating and displaying 本文设计了基于ppf控制算法的带钢纠偏控制系统,并提出采用电容传感器与高频光电传感器冗余检测带钢偏移信号的方法,增加了系统的可靠性。系统采用siemenss7 - 200plc控制,扩展了em235模拟模块, td200用于操作及显示。