| The continuous development of national economy and modern industry automation technologies have made the flow rate, which is one of the most important process parameters, the main index of the efficiency, work condition and economical ability of manufacturing. Thus, the flow meter for the flow rate measurement is becoming more and more important. It appears that the electromagnetic flow meters (EMF) are particularly suitable in industry manufacture because they are essentially noninvasive, their methods of sensing do not influence the flow regime and they have no moving parts. Nowadays, almost all flow meter manufactures around the world have their own EMF products, which are playing significant roles in industry and notional defense areas.With the development of electronic technologies, the new type sensors, electronic components and ICs can be applied in EMF. It is possible that the speed, accuracy, reliability and application range can be improved and enlarged. Based on the analyze of the situation of EMF’s development in the world, this paper combined the new type MCU, high ability ICs and sophisticated communication techniques,applied blocking modularization programming method, used several signal processing algorithms and anti-interference techniques to design EMF intelligent transmitter, which is compatible for the HART field bus communication. This EMF accord with the trend of developing intelligent, networks compatible and multi-function instruments. |
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