PAMC Based IEEE 1451 Wireless Sensor Interface Plug And Play Mechanism and Implementation

Abstract

Aims at ZigBee wireless intelligent sensor that complies with IEEE 1451.5, an implementation method based on periodic association matching communication (PAMC) is put forward in order to realize wireless sensor interface plug and play. Four kinds of communication message frame format are defined at ZigBee application support sublayer, and the contents of transducer electronic data sheet (TEDS) are redefined according to actual application. Both network capable application processor (NCAP) and wireless transducer interface module (WTIM) start protocol stack event handling process to monitoring network structure change, and data storage units are used to realtime update, save the network structure parameters. An association configuration table is defined in NCAP to preserve WTIM transducer channel information. Through the association request frames periodically send by WTIM, NCAP can quickly and accurately identify WTIM access, disconnect network. Set up a ZigBee intelligent sensor system test platform, test show that using PAMC method can effectively implement IEEE 1541 wireless sensor interface plug and play and identification; Set association matching communication period to 1 second, WTIM network access time is less than 1.8seconds, better meets the practical application requirements.