IEEE 1451.2 based smart sensor system using ADuc847

IEEE 1451 standard defines an interface for connecting transducers to microprocessor based data acquisition systems, instrumentation systems, control and field networks. A Smart Transducer Interface Module (STIM) is a unit which provides signal conditioning, digitization and data packet generation functions to the transducers connected to it. This paper describes the implementation of a microcontroller based smart transducer interface module based on IEEE 1451.2 standard. The module, implemented using ADuc847 microcontroller, has 2 transducer channels and is programmed using C language. The Sensor system consists of a Network Capable Application Processor (NCAP) module which controls the STIM over an RS232 interface. The NCAP module is implemented as a software module in C Sharp language. The hardware details, control principles involved and the software implementation for the STIM are described in this paper.