Network Sensor Based On The Ieee1451 Standard

Sensor as a source of data is more and more important in information era. With the rapid development of computer and communication technologies, the sensor technology has developed into a new period, namely the smart and networked sensors. How to combine sensor and network, it becomes a important way for sensor.At ptesent, intelligent sensors are not compatible because of multi-field bus. This will influence intelligent sensors' development and implication. Aming at this question, IEEE sets down intelligent sensor interface standard — IEEE 1451 for realizing transducer interface standardization.After a careful discussion of the smart transducer standard, i.e. IEEE 1451 Standard, this dissertation presents an Internet-enabled smart transducer model, i.e. an network sensor model, and realizes its full working prototype.According to IEEE1451.1 and 1451.2, Herein, the proposed Networt sensor model is made up of two parts: including namely Nerwok capable Application Processor Module (NCAP) and Smart Transducer Interface Module (STIM) . The hardware uses tow mcu which MC9S12NE64 for NCAP and PIC16F877 for STIM.The STIM is compliant with IEEE 1451.2 standard and includes Transducer Electronic Data Sheet(TEDS), transducer-independent interface (TII) addressing logic,etc. NCAP implements the TCP/IP stack and an embedded web server and provides the standard user interface based on web browsers, which make the Net sensor Internet visible and capable . NCAP also implements the data correction engine.Finally, some experiments are made to verify the functions of the proposed Net Sensor. The results experimentally show that the proposed net sensor is feasible and suitable for Internet-based applications.