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在机械和其他一些行业,行程程序控制系统使用十分广泛,由于流控技术,主要是气动逻辑控制和射流技术的发展,国内总结出了“X—D图”即“信号—动作状态图”设计方法,已经得到了普遍应用。它实际上是一种图解法,在判断障碍或校核是否全部消除了障碍信号时,直观形象,便于初学者掌握,但程序复杂或障碍信号较多时,不易直接观察或者很难找出制约信号去消除障碍。
In machinery and some other industries, itinerary control system is widely used. Because of the flow control technology, mainly the development of aerodynamic logic control and jet technology, the “X-D map” that is “signal-action state map” design Method, has been widely used. It is actually a graphical method, in the judgment of obstacles or check whether the elimination of all barriers to the signal, the visual image, easy for beginners to master, but the program is complicated or obstacles signal is more difficult to directly observe or difficult to find the control signal To eliminate obstacles.