distributed information measurement and control system, network sensors, Ethernet Interface, clientserver technology distance education.
Institute of Information Theories and Applications FOI ITHEA
The development of the distributed information measurement and control system for optical spectral
research of particle beam and plasma objects and the execution of laboratory works on Physics and Engineering
Department of Petrozavodsk State University are described. At the hardware level the system is represented by a
complex of the automated workplaces joined into computer network. The key element of the system is the
communication server, which supports the multi-user mode and distributes resources among clients, monitors the
system and provides secure access. Other system components are formed by equipment servers (CАМАC and
GPIB servers, a server for the access to microcontrollers MCS-196 and others) and the client programs that carry
out data acquisition, accumulation and processing and management of the course of the experiment as well. In
this work the designed by the authors network interface is discussed. The interface provides the connection of
measuring and executive devices to the distributed information measurement and control system via Ethernet.
This interface allows controlling of experimental parameters by use of digital devices, monitoring of experiment
parameters by polling of analog and digital sensors. The device firmware is written in assembler language and
includes libraries for Ethernet-, IP-, TCP- и UDP-packets forming.