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在水情自动遥测系统中,中心控制站采用不对称双微机系统,这样既经济又可靠,多年来的实践证明是好的。双机系统中的前置值班机大都采用日本进口的CMOS型KC-85机,而购进的KC-85计算机随机存贮器(RAM)仅16K,在遥测站较多的情况下,内存空间远远不够,过去均向厂方定购日本进口的2片特制的8KRAM,每片400元左右,价格较高,且出差购置扩展RAM片,在时间与经费上均是浪费。为此,自去年起,决定自己制作扩展内存片,使用至今,在各个水情自动遥测系统中效果很好,现将其原理与线路图介绍如下。
In hydrological automatic telemetry system, the central control station using asymmetric dual-computer system, so that both economical and reliable, proven over the years has been good. Most of the pre-flight aircraft in the dual-system use CMOS-type KC-85 imported from Japan, while the KC-85 computer random access memory (RAM) purchased is only 16K. In the case of more remote stations, the memory space Not enough in the past are ordered to the factory in Japan 2 specially made imported 8KRAM, about 400 yuan per piece, the higher the price, and business trip to purchase extended RAM tablets, in terms of time and funding are a waste. To this end, since last year, decided to make their own extended memory chip, so far, in various hydrological automatic telemetry system works well, now the principle and circuit diagram is as follows.