Data Acquisition and Control System Via Ethernet/LPC2132

Overview

The project utilizes the LPC2132 microcontroller to create this Ethernet data acquisition and control system suitable for acquiring data or signals from a large scale industry field by grouping together hundreds of terminals within an Internet.

Explanation

There are 8-channel discrete switching signals inputs featured by the system along with 4-channel analog signal inputs, 2-channel analog voltage signal outputs, and 2-channel pulse signal input for counter. Other devices can be controlled by including 2 channels for relay output. Ethernet is used to transmit data to the host unit by successfully porting IPv4 protocol stack wherein the communication with servers uses UDP datagram. Data from multiple terminals will count into a server, a PC or an embedded industrial computer through Ethernet. The datagram will be encapsulated and will wait for the server to transfer when discrete and analog signals are acquired and transformed to binary data.

Designing this terminal for industrial-field use leads to acquiring discrete switching signals and analog signals. Both voltage and current signals are acceptable especially for the analog signal since the analog front end is designed to be compatible with industrial standard 4-20mA current loop and 0-10V voltage line.