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二、液压流量计测系统水及附加剂的液体计量均采用 LW-15和 LW-10型(上海自动化仪表九厂)涡轮流量变送器,其原理是:当管道中液体在一定压力下流过流量计时,叶轮的旋转运动改变了永磁棒在管内壁的磁通Φ,相应地在永磁棒上的线圈上产生交变感应信号 u(?),放大等处理后为脉冲信号,即得所需的液体流量信号。脉冲当量换算为液体在一定恒压下每升的脉冲数,同一规格的流量计单位脉冲数不一定相同,有一定的离散性。如 LW-15
Second, the hydraulic flow meter measuring system water and additive liquid measurement using LW-15 and LW-10 type (Shanghai Automation Instrument Factory 9) turbine flow transmitter, the principle is: When the liquid in the pipeline under a certain pressure flow through In the flowmeter, the rotating motion of the impeller changes the magnetic flux Φ of the permanent magnet rod on the inner wall of the tube, and correspondingly generates an alternating induction signal u(?) on the coil on the permanent magnet rod, and the pulse signal is obtained after amplification and the like, that is, The required liquid flow signal. The pulse equivalent is converted into the number of pulses per litre of the liquid under a certain constant pressure. The number of units of the flowmeter of the same specification is not necessarily the same, and there is a certain degree of dispersion. Such as LW-15