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六、系统的装配1.概述理论上最好的系统设计实际执行时往往以性能不佳而失败。出现这一结局的原因一般是没有处理好地线与电源线的分布以及其他一些实际装配问题。因此有必要专门讨论一下数据采集系统的装配。布置地线与电源线的第一条原则是:要把地线与电源线看作实际存在的电阻与电感,当电流流过这些导线时,将产生电压降。认识这些压降的存在及影响将帮助我们消除它们在采集系统中的不良影响。
Sixth, the system assembly 1. Overview In theory, the best system design, the actual performance is often poor performance and failure. The reason for this outcome is generally not to deal with the distribution of ground and power lines and other practical assembly problems. Therefore, it is necessary to discuss the data acquisition system assembly. The first rule in laying out ground and power cords is to think of ground and power cords as real resistance and inductance, and when a current flows through these wires, a voltage drop will occur. Recognizing the existence and impact of these pressure drops will help us to eliminate their adverse effects in the acquisition system.