To solve the problem of a type of electronic equipment maintenance, a kind of portable testing instrument is developed. The instrument adopts embedded development, PC104 bus and fault reasoning technology to realize the functions of signal test, fault diagnosis, repair instructions and data query. The instrument is mainly composed of a hand-held chassis, LCD screen, touch screen, Intel main control board, oscilloscope card, multimeter card and power supply module, on the basis of PC104 bus structure. The A/D conversion circuit uses multiple cross parallel high-speed data acquisition architecture to achieve sampling data of higher accuracy and higher speed. The main control board and test function card is designed and the principle of circuit module is described. The signal testing and fault diagnosis software is developed. The instrument has good application effect, with the advantage of practical and portable.
The process and design scheme of IETM system based on GJB6600 standard was introduced in this paper, and automatic control equipment maintenance was studied with IETM data description and storage technology,the data description scheme, data storage and query framework were established, realized the conversion from XML data to relational database, and the small IETM browsing prototype was developed. This project had important significance to shorten the maintenance time and improve the efficiency of equipment protection.
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