Electrical Engineer The PDA Formula Manipulation And The Material Inquiry Design With Realize

The electrical engineering technical personnel will meet each kind of electric signal frequently questions and so on survey,computation,analysis,current will solve these problems not to be able to leave the oscilloscope,the avonmeter,the electrical engineering handbook,the calculator and so on.This topic attempts PDA which designs on a similar palm computer's electricity technical personnel to use,its may the collection avonmeter,the oscilloscope,have the electricity material online inquiry and the electricity formula online computation function in a body.Thus reduces the electrical engineering technical personnel's labor intensity,enhances the detector set the automated level and the precision.This article for this topic's part,mainly studies designs and so on formula manipulation,material inquiry,pronunciation guidance.Applies embedded system's software and hardware design technique and the data technology,based on the ARM core,the WinCE operating system and the application procedure realizes.The hardware aspect selects the S3C2410 processor,carried on NORFLASH, NANDFLASH,SDRAM to the memory to expand,has designed the LCD/touchscreen driving circuit,theⅡS interface circuit,the audio frequency amplification electric circuitThe software aspect tool carried on through Platform the Builder to the WinCE system has custom-made,realizes BSP to induct with the SDK foundation,completed to the WinCE system's transplant;Uses SQL server the ce migration database to carry on the mass data the memory,has completed the database foundation,the connection, has realized the database visit mechanism.Used EVC and SQL SERVER CE unifies has designed the electricity formula computation and the electrical material inquiry function,the user use electricity formula computation,but the direct input formula variable value carried on the computation,also after might inquire first calculated,the electricity material inquiry aspect,inquired fuzzily through the fuzzy language classifier expansion inquiry and the fuzzy language classifier,has realized to the database fuzzy inquiry,finally,has completed the pronunciation guidance function software design with EVC.In this paper,The overall modular design,each module has an independent function.Through the design of studies have proved that electrical engineers PDA calculations to achieve a good performance and accurate information search function, and the voice navigation,PDA meets the characteristics of electrical engineer,Has broad application prospects and practical value is a good electrical engineer partner.