Study On The Hardware System For The Remote Electronics Experiments

With the development of the information technology, the remote teaching & learning has been a meaning learning way. The remote experiment is a necessary chain for the remote education in the engineering major. It's necessary to research the remote experiment. Based on the technical conditions as well as the actual need for the remote teaching & learning now,the thesis expatiates the researching production for the remote electronics experiments.The main achievements of the thesis are as follows: (1) The thesis brings forward the scheme of the remote electronics experiment,which is constituted by the remote electronics experiment hardware platform and the remote experiment software platform. The feasibility of the remote experiment is verified by the small scale experiment system. Based on the above work, the thesis brings forward the hardware platform scheme of the remote electronics experiment platform, which integrates the main experiment board, the signal source, the digital oscilloscope. The users can remotely, digitally and real time control specific remote electronics hardware work platform to complete the experiments operation.(2) The digital main experiment board is designed, in this scheme, the Analog Multiplexers are taken as the nodes selectors to construct the 16 nodes structure of the experiment board. The connection of the nodes of devices can be digitally set. The DCP (Digital Control Potentiometer) is selected as the resistor library component, the capacitances and the inductances with the different parameters respective are selected as the capacitance library components and the inductance library components, the parameters of components are set with the Analog Multiplexers. According to the hardware structure of the main experiment board, the circuit netlist transformation program translates the visual circuit description to the actual netlist. Recurring to the circuit netlist, the mcu of the main board finishes the digital setting for the parameters and the structure of the experiment circuit, which realize to do all kinds of electronics experiments in the same main experiment board.(3) The thesis introduces the DDS (Direct Digital Synthesis) technology, compared with the other available schemes. The signal source which can produce the arbitrary wave (also named Arbitrary Waveform Generator) is designed based on DDS, in order to improve the performance of the AWG. The scheme takes the CPLD (Complex Programmable Logic Device) as the control core for the AWG based on the DDS technology so as to realize to digitally produce the waveform.(4) The whole remote experiment is debugged, and the prototype of the remote experiment system has been completed, ten remote experiments have been verified.