Design And Implementation Of Photocurrent Spectrum Virtual Test System

Paper focuses on the photocurrent spectrum virtual testing system base on GPIB,and studies about electrochemical corrosion measurement,photoelectrochemical measurement and other conjunctive multi-instruments testing. Most of the domestic institutions even the state key Lab commonly used artificial methods to operate the test.The complicacy of process and the high risk of errors affect the research.The paper studied typical applications and designed a solution about a convenient and efficient testing control system.The ideas of the solution meets the actual needs and the test objectives of the Institute of Chemistry and Chemical Engineering of Xiamen University, State Key Laboratory of Physical Chemistry of Solid Surface.It realizes the system with years of comprehensive practice and experience of the state key lab.The system is put into use nearly two years and has good performance.The system architecture follows Auto Test System design and uses Virtual Instrument,Plug-In Modules,Data Driven Testing and Object-Oriented Technology. This dissertation innovates a control mode for multi-endpoint multi-sequential logic.The system implements the"photocurrent spectrum", the"potential to current"and the"current to time"auto measurements.It support GPIB and serial port, domestic and foreign manufacturers of different instruments. It also provides convenient visual image data interface and data management and provides for a wide range of chemical analysis software to exchange testing data.The photocurrent spectrum virtual test system has well stability and compatibility,and also high precision,convenient operation.It compared to similar foreign system has the following advantage:(1) Cost saving. Similar overseas software system usually were sold at a very high price.The system only takes 10 percent to 20 percent cost by comparison..(2) Flexibility. In addition to the supporting types of tests, system can add new types of tests following the designed architecture. (3) Professional.The system is designed targeted for electrochemical corrosion measurement and photoelectrochemical measurement.It highlined the phenomenon and the results of the tests and realized the fast or slow return of testing process.Photocurrent spectrum tests supported by the system is the Infrastructure work of Optoelectronic semiconductors and electrochemical corrosion researches.But most of domestic research institutes still lack of efficient testing system.So this system has not only applied research value bu also broad market prospects.