Upgrade And Experiment Of FMT System Based On Parallel Port

The dynamic precision measurements of property such as transmission error, single shaft motion speed and acceleration and so on , involve in frontal technologies about subjects including optics, mechanics, electricity, magnetism and computer .And these measurements play an important role in many manufacture fields. The Full Micro-Computerized Test and Analyzing System for Transmission Error and Motion Property (FMT), whose core is micro -computer, is a new system for TE test and analyzing, combining plus signal subdivision theory with computer. And our research ——Upgrade and experiment of FMT system based on parallel port, is the further research and upgrade of the FMT system. In soft, abnegating bald Dos operating system, we will realize testing and displaying in real time on Windows operating system. In hardware, we use computer as postposition CPU, Monolithic Processor as front CPU, and link them into simple network by computer's parallel port. In this way, we will realize a kind of distributing testing system providing with high precision and remote controlled ability. The main research contents of this dissertation are shown in the following: (1) This paper presents the test theory of a transmission error system token count of impulse and expatiates a new subdivide mean which is used high frequency's temporal signal to subdivide special signal. (2) This paper analyses parallel port's principle in mode ECP, solves bi-communicate problems in mode ECP, and makes data transmission true. (3) Based on Visual c++ language, a system of virtual instruments is designed, including Data acquisition and register instrument, Real-time analysis instrument and Spectrum instrument. In the end of this thesis, the results of experiments and error curves are given, by testing for simulative and hypostatic transmission chain, and demonstrates FMT system's correctness and practicability.