Multifunction Experiment System Of Computer Aided Test

With the development of science and technic , and the improvement of the automatic degree, Computer Aided Test system was applyed to production and scientific research widely with its strongpoints of high reliability, nicety and flexibility. The experiment equipment of CAT plays a very important role in updating experiment means, enhancing experiment content and increasing the rate of experiment utilizing. This paper presents the design scheme of CAT experiment and the realization of its main parts from the idea of modularization based on the structure of CAT system and the characteristics of experiment. Multifunction borad and coverting module are the main parts of the system. Multifunction borad fulfills the functions of experiment data gathering, processing, analysis and man-machine interface. And the converting module accomplishes the processing of sensor signals. The software comprises of the currency modules of keyboard, LCD display and the special modules aiming at data processing and analysis of different experiment. In short, Multifunction borad and coverting module are the foundation of the hardware of the system and the urrency modules and the the special modules are the foundation of the software of the system. Not only the hardware experiment but also the software experiment can be done on this system. It is beneficial to the construction of laboratories for teaching.