Research And Development Of Virtual Multi-channels Dynamic Signal Analyzer

Human being have came into an information century,information have increasingly been an important resource for human life and the development of science and technology. The technology of dynamic signal test which aim is collecting and dealing with different kinds of dynamic information is a compositive technology,which have quite important status in modern science and technology.Dynamic signal analyzer have been widely applicated in aviation,spaceflight,military affairs, transportation, environment,inechanic,medical treatment, mechatronics product and robot research. The apparence and development of computer technology impel virtual instrument's birth and application widely.which have arosed a revolution in test and control fields.Virtual multi-channels dynamic signal analyzer is an outcome combining virtual instrument and dynamic signal test technique.Along with the development of embedded technology, virtual instrument based on embedded compuer have attracted increasingly attention.Through shifting the software of virtual multi-channels dynamic signal analyzer to embedded operating system, have made birth to a virtual multi-channels dynamic signal analyzer based on embedded comper ,which took many advantages including small size,easy to take,and specially using in test and control on locale.The paper below described several parts about research and develop work.1) Studied main assignment and purpose of dynamic signal analyzer firstly,then it introduced the domestic and foreign development actuality of dynamic signal analyzer,of which it summarized the new development direction . The ways and content are discussed.2)Introduced the arithmetic and function modeling of time field and frequency field in FFT module.and relevant time-frequency analysis theory.The structure principle and programming flow of memory oscillograph and data logger have been given.3)Presented how to construct an embedded computer,keyboard circuit and soft design(including compilation programming and driver ones ),introduced the develop flow of embedded operation system and shell program.4) this paper particularly discussed how to second- encapsulate the driver of different kinds of hardware card, made it like using one card when there are many cards,besides the API interface function were given.At the same time, the system alsomade use of MySQL database to realize greate data logger,data and information management and file format transform. Besides all of that,the instrument have been put into application.5) At the end of the paper ,the author proposed a series of step to consummate the system,including standard driver program,extension software function and application in net.