Development of A 128 channel microcomputer data acquisition system

Abstract

This paper describes the development of a computer software for analog to digital data acquisition. The major system hardwares consist of an IBM/AT compatible together with a Metrabyte Dash 16/F and 8 Exp-16 interface boards. The system is capable of providing 128-channel on-line data acquisition at a maximum sampling rate of 0.2 Hz. The raw data from all channels are simultaneously monitored on a screen in numerical form. Upon completion of data acquisition, the system allows the user to display the raw data stored in a data file graphically for each channel. The system is versatile and economical and is ideally suitable for laboratory work. Program listings are attached as a reference base for further work development. It is suggested to use block channel scan technique to increase the data sampling rate.