Software design for steam flow totalizer 蒸汽流量积算仪的软件设计
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The signal totalizer integrator can be used to compute a time - input product 信号累加器积分器用于计算时间输入产品。
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The totalizers are turned one by one and then ” snailed ” ( decorated with spiral lines ) , before being colored 用车床将累计器一个个加工出来，然后饰配用螺旋纹状线条，最后再进行着色。
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This can be used to provide readout of totalized flow , calculate service intervals of motors or pumps , etc . the totalizer can also accumulate batch weighing operations 它可以读出总电流计算马达或泵的运行间隔等等。累加器也可以累计成批称重操作。
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The spindle flowmeter and the especially designed totalizer highly improve the precision of measurement , and the measuring system made up of them is very easy to use 置于测量现场的多台积算仪与上位pc机之间可以通过rs - 485串行总线进行数据传输,构成高精度的分布式测量网络。
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In recent years , people have paid much more attention to the accuracy of flow measurement as technology progresses . the intelligent flow totalizer system in this design is combined with the spindle flowmeter , the embedded system techniques and serial communication techniques 近年来,伴随着工业生产、医疗卫生等领域的技术进步,人们对流量计量提出了更高的要求,而在全球自然资源供应日趋紧张的今天,提高流量测量精度更具有举足轻重的现实意义。
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During the period of measurement , the transduction circuits transform the differential pressures , the absolute pressures and the temperatures received by the sensors into the voltage signals , and then , the voltage signals are transformed into digital signals by the a / d convertor . the mcu processes these digital signals and calculates the cumulation of the flow . finally the totalizers contact with the pc by rs - 485 bus to form a distributed measuring network 在测量过程中,系统以流量计节流所获得的差压信号作为主信号、绝压和温度信号作为补偿信号进行流量积算,这三种信号分别由相应传感器感知后,经各自的物理信号测量电路转换为电信号,再由a / d转换模块转变为数字量,交微控制器进行处理、积算。
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Abstract : based on the analysis of the mathematics models of saturation steam density and superheat steam density the paper states that the deviation of the detection on temperature highly affects the accuracy of intelligent flow totalizer . especially for saturation steam ， the accuracy of the temperature detection circuit shall be designed higher than the accuracy of the instrument . thus a temperature detection circuit based on ratio method with high accuracy is introduced 文摘:在分析饱和蒸汽和过热蒸汽密度的数学模型的基础上指出，温度检测的偏差对智能流量积算仪的精度影响极大，尤其是饱和蒸汽，测温电路的精度应设计为远高于仪表的精度，同时引入一种基于比率法的高精度测温电路。
