电磁流量计的工作原理（The working principle of electromagnetic flowmeter）.docVIP

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电磁流量计的工作原理（The working principle of electromagnetic flowmeter）.doc

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电磁流量计的工作原理（The working principle of electromagnetic flowmeter） The working principle of electromagnetic flowmeter Eletromagnetic Flowmeters (EMF) is a new type of flow measuring instrument developed rapidly in the twentieth Century 50~60 with the development of electronic technology. Electromagnetic flowmeter is made according to Faradays electromagnetic induction law, and electromagnetic flowmeter is used to measure the volume flow of conductive liquid. Because of its unique advantages, the flow measurement of electromagnetic flowmeter has been widely used in various industrial processes in a conductive liquid, such as acid, alkali, salt and other corrosive medium; electromagnetic flowmeter for various slurry flow measurement, forming a unique application. In structure, the electromagnetic flowmeter consists of two parts: the electromagnetic flow sensor and the converter. The sensor is installed on the industrial process pipeline. Its function is to change the volume flow value of the liquid into the pipeline linearly into the potential potential signal and transmit the signal to the converter through the transmission line. The converter installed in the not too far from the sensor, it will amplify flow signal from the sensor and converts the flow signal proportional to the standard signal output for display, accumulation and control. The basic principle of electromagnetic flowmeter (1) measurement principle According to Faradays law of electromagnetic induction, when a conductor moving in a magnetic field in the conductor cutting magnetic lines, both ends of the generated EMF e, its direction is determined by the right-hand rule, the magnetic induction B with the magnitude of the magnetic field of the conductor in the magnetic field and the conductor length L velocity is proportional to u, if B. L u, the three is perpendicular to each other, E = Blu (335) And this is similar. In the magnetic induction B uniform magnetic field, perpendicular to the magnetic field d