Informatic system of interactive training for virtual laboratory type aplications L.Nita 1 , C. Dosoftei 2 , C. Donciu 3 , C.Sarmasanu 4 1 "Gh. Asachi" Technical University, Iasi, Faculty of Electrical Engineering, Bd. D. Mangeron, 53, 700050, Iasi, Romania, phone +40232278680, Fax +40232237627, lucian.nita@office.romus.com.ro 2 "Gh. Asachi" Technical University, Iasi, Faculty of Electrical Engineering, Bd. D. Mangeron, 53, 700050, Iasi, Romania, phone +40232278680, Fax +40232237627, cdonciu@.ee.tuiasi.ro 3 "Gh. Asachi" Technical University, Iasi, Faculty of Electrical Engineering, Bd. D. Mangeron, 53, 700050, Iasi, Romania, phone +40232278680, Fax +40232237627, cristiandosoftei@ee.tuiasi.ro Abstract - The project proposes accomplishing of a new informatics system architecture, under the form of a high-speed virtual laboratory, with a multitask type access on laboratory work, to remove users’ waiting lists and allow reconfiguration of electric assembling in real time. Accomplishing the project was preceded by a thoroughly analysis of didactic requests according to economic problems, so that, the following aspects would be solved: Students will access from the distance real instruments and will accomplish online test montages, in the idea of understanding all the aspects of a real experiment (including possible flaws). Errors detected in prescribing the commands towards the machine will not be corrected automatically, but the student will be warned. The results of the tests will be supplied by the user in the same way the real instrument does. I. Introduction The system architecture is composed of multitask server with the role of realizing the interactive communication between users and workstation, having the multitask administration interface as a resident software procedure, workstation with a role in controlled and assisted accomplishment of laboratory work and the reconfigurable platform that represents the physical area of work development and whose equipment chaining structure is commanded by prescription from the users of the assembling scheme accomplishment nodes. In this project we use NI SCXI-1130 matrix to realise a programmable platform witch permits the configuration by soft of an independent work papers laboratory. This matrix has 256 switches (8 lines by 32 columns). Every switch is commanded true a code sent by matrix and each time must be connected one active source on line or column. Rows will be note R 0 ÷R 7 and columns whit C 0 ÷C 31 . Interface between PC and Configurable Platform is made by an acquisition and generation data board witch is introduce to the bus system and permits generation of numeric and analogical signals thru soft, acquisition signals and, conversion in numeric format and save the information in the memory PC. In figure 1 we presented the block of the experimental system. The analog to numeric interface connected on the PC bus has several tasks to realise the virtual laboratory: - Its sends numeric codes to the programmable matrix to command the switches; - Its sends numeric codes to command the digital to numeric converter from the work platform; - Its reads the voltages from the measure points of the laboratory papers, it’s save them in the pc memory and sends them to the final user; PC Interface for acquisition and date generation Programmable matrix Configurable platform Figure 1. System architecture