一、概要这种电磁流量计具有其它流量计所不具备的优点:没有活动部分,无压力损耗,能测量含有腐蚀性流体、泥浆、固态物体等的混合液的流量。特点是:测量成分复杂的合成流体,不受温度、压力、密度、粘度等的影响,适宜于测量导电的液体流量。随着电子技术的发展、加工技术的进步,电磁流量计也不断改革、创新,主要的有:电气方面的90相位噪声的消除,输入电路的静电屏蔽与传输电缆的延长方法,信号电压/磁场的除法电路;结构方面的衬里材料与粘结方法的 I. Introduction This kind of electromagnetic flowmeter has the advantages that other flow meters do not have: no moving parts, no pressure loss, and can measure the flow of mixed liquid containing corrosive fluid, mud, solid objects and so on. Features are: Synthetic fluids with complex composition, independent of temperature, pressure, density, viscosity, etc., suitable for measuring the flow of conductive liquids. With the development of electronic technology, processing technology advances, electromagnetic flowmeter is also constantly reform and innovation, the main are: the elimination of 90 phase noise in the electrical, the input circuit electrostatic shielding and transmission cable extension method, the signal voltage / magnetic field The division circuit; the structural aspects of the lining material and the bonding method