Design of experiment in digital electronic technique based on virtual remote laboratory

SUN Xin， ZHU Shan-an
（College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at solving the problem of high investment，high maintenance fee，time and location restriction that exists in the traditional electrical engineering laboratory，a virtual remote laboratory which includes client side，multi-serve and computing cluster was designed. The communication between the three parts is based on extensible makeup language XML. The virtual scene operating platform was constructed based on Adobe Flex technology，the computing serve was developed based on the well-established network framework Python Twisted. When a virtual circuit is established，virtual scene data was sent to the computing serve. Based on the virtual scene data，a Modelica model was generated and computed by OpenModelica compiler and then sent back to client side. A half adder experiment in digital electronic technique course was showed to demonstrate the operating procedure and the simulation results. The results indicate that virtual remote laboratory is user-centered，reliable，easy to operate and boasts good interactivity and extensibility，which can effectively make up the deficiencies of traditional electrical engineering laboratory.
Key words： virtual laboratory；remote laboratory；digital electronic technology；Modelica；Flex