Research Of Intelligent Electric Energy Transmitter Based On EPA

Recently, Ethernet and TCP/IP have been gradually applied in automatization industry and developed into an Industry Ethernet meeting the needs of industry field, because that the standardization of International fieldbus technique hasn't reached perfect result. This technique can be compatible with commercial Ethernet.Communication networks for industry are most quickly developed in current industry automation fields. As a communication link of intelligent devices, based on standard communication protocols, the open networks technology integrate dispersive devices with communication function, such as intelligent transmitters, actors, intelligent contral devices, workstations, to a comprehensive information plant and realize the integration of field control, supervising and managing, optimizing and decision-making.This paper sums up outlines the states of the art of fieldbus and Ethernet for the automation in the world, analyzes the characteristic and ability of communication networks used in industry. It makes detailed research on the key techonlogy of precise intelligentized transmitter with EPA (Ethernet for plant automation) function: (1) research on the field-instrument in which EPA is embedded. (2)research on the communication determinability of EPA intelligent transmitter.This paper presents full solutions of EPA intelligent transmitter, EPA embedded communication circuit board signal processing,environment compensation based on FFT. Based on these solutions, a pattern has been accomplished.Research on EPA intelligent transmitter has acquired the following domestically advanced achievements: EPA embedded communication technology, test for EPA instruments, power supplied on bus, hight precision detection, software compensation arithmetic and so on. These achievements provide an advanced and practicable solution to the EPA networks communication technology and intelligentized automation net-instrument in China.