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Traffic is an important industrial and agricultural production process control measurement parameters, and the people's daily life and industrial applications has a close relationship, therefore, the application of a wide range of flowmeters. In addition to electromagnetic flowmeter has a simple structure, unimpeded flow of parts, measuring principle is linear, high accuracy, wide measurement range and a series of advantages, it also has a measurement value is only related with the volume of fluid has nothing to do with the fluid parameters of this remarkable advantages So being more and more used. China's current level of electromagnetic flowmeters far behind developed countries, in reference to some of the core technologies rely mainly on foreign technology. Based on the electromagnetic flowmeter in-depth research, to develop a proprietary electromagnetic flowmeter, specifically, the main contents are as follows: Firstly, introduces the research background and significance, according to an electromagnetic flowmeter Family Benefits determined using electromagnetic flowmeters measure flow solution, then explained the characteristics of electromagnetic flowmeters, research status and trends. Secondly, the introduction of the principle of electromagnetic flowmeter, the Maxwell equations based on the theory of electromagnetic flowmeter measurements carried out a detailed analysis, the basic equations, on the process of solving the equation further discussed in detail weighting function, and using MATLAB tool weight function graphically; On this basis, discussed the velocity distribution, flow velocity, the magnetic field effect on the electromagnetic flowmeter edge effects. Again, introduces the basic electromagnetic flowmeter sensor component of the measuring tube, lining, electrodes, flanges, and other major components of the excitation system for a detailed description, and according to the actual situation, choose a more suitable material, structure, assembly methods, manner and frequency of excitation, and in order to reduce the operating magnetic field effect on the signal, the signal is given the go-line lead, grounding and other measures. Finally, to avoid the flow velocity distribution of the electromagnetic flowmeter impact of non-uniform magnetic field using the concept of the electromagnetic flowmeter, the measured value at this time only the size and flow-related; in order to obtain this state to the desired magnetic field distribution, the Maxwell's equations, based on the use of MATLAB solution out of the field coils ideal size values; under ideal dimension value based on the consideration of coil winding process, practical factors such as the thickness of the measuring tube, drawn rectangle, saddle two kind of excitation coil form, and the use of ANSYS simulation of the two magnetic coils, for comparison.
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