單片機(jī)控制系統(tǒng)外文翻譯(完整版)
【正文】 n lf a hobby puter, or as a ‘packaged’ system, signed for replacing controllers based on older technologies such as electromagic relays. In the former case the system would 4 probably be programmed in conventional programming languages such as the ones to9 be introduced later, while in the other case a specialpurpose language might be used, for example one which allowed the function of the controller to be described in terms of relay interconnections, In either case programs can be stored in RAM, which allows them to be altered to suit changes in application, but this makes the overall system vulnerable to loss lf power unless batteries are used to ensure continuity of supply. Alternatively programs can be stored in ROM, in which case they virtually bee part of the electronic ‘hardware’ and are often referred to as firmware. More sophisticated process controllers require miniputers for their implementation, although the use of large scale integrated circuits ‘the distinction between mini and microputers, Products and process controllers of various kinds represent the majority of presentday microputer applications, the exact figures depending on one’s interpretation of the word ‘product’. Virtually all engineering and scientific uses of microputers can be assigned to one or other of these categories. But in the system we most study Pressure and Pressure Transmitters. Pressure arises when a force is applied over an area. Provided the force is one Newton and uniformly over the area of one square meters, the pressure has been designated one Pascal. Pressure is a universal processing condition. It is also a condition of life on the pla: we live at the bottom of an atmospheric ocean that extends upward for many miles. This mass of air has weight, and this weight pressing downward causes atmospheric pressure. Water, a fundamental necessity of life, is supplied to most of us under pressure. In the typical process plant, pressure influences boiling point temperatures, condensing point temperatures, process efficiency, costs, and other important factors. The measurement and control of pressure or lack of itvacuumin the typical process plant is critical. 5 單片機(jī)控制系統(tǒng) 廣義 地說， 微型計(jì)算機(jī)控制系統(tǒng)（單片機(jī)控制系統(tǒng)） 是用于處理信息的，這種 被用于處理的 信息可以是電話交談， 也可以是 儀器 的 讀數(shù)或 者是一個(gè) 企業(yè) 的 帳戶，但是各種情況下都涉及 到
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