Based On Embedded Control Systems Expansion Bus Pseudo-random Multi-frequency Observation System

This paper describes the principle, hardware and software of the Pseudo-random Multi-frequency IP & MT Data Acquisition and Processing System in detail.The Pseudo-random Multi-frequency IP & MT Data Acquisition and Processing System designed based on the 2n Series Pseudo-random Multi-frequency Signal Theory, which developed by He Jishang Academician. In this paper, there are simply depiction and analysis to the theory, and the realization scheme in detail. The structure and function of every hardware unit, implanted microcomputer PC/104, technology of computer interface and the design method of controlling software are analyzed in detail in this paper. The use of controlling instrument by parallel port of PC/104, multi-bus technology, Analog Fourier Transform Technology (AFT) instead of Instantaneous Sample Technology, dynamic distributing AFT units, make the system simple, cheap but powerful, efficient and versatile.Based on MS-DOS, the system software is programmed in C and assemble language. It's driven by Chinese menu and pop-up windows. The interface is friendly and easy to operator. Real time controlling section codes are greatly tight and simplified. The controlling operation is safe and reliability.The Pseudo-random Multi-frequency IP & MT Data Acquisition and Processing System is designed versatile sufficiently for Tri-channel Single Frequency , Bi-channel Bi-frequency, One-channel Seven-frequency IP or SIP, and CSAMT to collecting high quality data.