The design of the decision support system for rice ecological balanced fertilization keeps to the life - period method of the software engineering , be designed phases , the summary design project of the whole system was brought forward by using the configurable analyses method , during decision support system design and realization , first analyze the flow of rice ecological balanced fertilization , and plot the database stream chart of rice ecological balanced fertilization , then adopt the data stream analysis method to bring forward sub - system function configuration table 水稻生態(tài)平衡施肥決策支持系統(tǒng)的設(shè)計遵循軟件工程的生命周期法,分階段設(shè)計開發(fā),用結(jié)構(gòu)化分析方法提出整個系統(tǒng)概要設(shè)計方案。在決策支持系統(tǒng)的設(shè)計與實現(xiàn)中,首先分析現(xiàn)行水稻生態(tài)平衡施肥的流程之后,繪制了決策支持系統(tǒng)的數(shù)據(jù)流圖,然后采用數(shù)據(jù)流分析法,提出子系統(tǒng)的功能結(jié)構(gòu)表,最后利用vb6 . 0 、 access2000數(shù)據(jù)庫、多媒體技術(shù)等面向?qū)ο蟮木幊坦ぞ?,實現(xiàn)水稻生態(tài)平衡施肥決策支持系統(tǒng)的功能。
The system is compatible with the various different types a / d converters , carry out the functions of the vibration signal sampling , the saving of data file , the timely wave showing , the configuration table edit , the former data return and data analysis etc . the functions of signal analysis include the time field statistics analysis , the time field mutual analyzing , the frequency spectrum analyzing , the relevant analysis , the transmission function analysis , the demodulating analysis , and the short fourier transformation of the time and frequency field etc . experiments verify that the system carry out stably and credibility , various functions is achieved , has precise analyzing results , high calculating speed and high precision , the expected targets have been reached 該系統(tǒng)可以兼容多種不同型號的數(shù)據(jù)采集設(shè)備,實現(xiàn)了振動信號的采集、數(shù)據(jù)文件的存儲、波形的實時顯示、組態(tài)表編輯、歷史數(shù)據(jù)回放與數(shù)據(jù)分析等功能。系統(tǒng)的信號分析功能包括時域統(tǒng)計分析、時域相關(guān)分析、頻譜分析、相干分析、傳遞函數(shù)分析、解調(diào)分析以及時頻分析中的短時傅立葉變換等。經(jīng)試驗驗證表明,系統(tǒng)運行穩(wěn)定可靠,各項功能工作正常,數(shù)據(jù)分析結(jié)果準(zhǔn)確、運算速度快、精度高,達(dá)到了預(yù)期設(shè)計目的。
In this paper , the hal - c conception is studied according to the project requirements , and describes the functions of the hal - c in software waveform implementation . then the issues implementing the hal - c on the specialized hardware processor are addressed , and the methods of managing the components on fpga and dsp by proxy components with the domain descriptor file and the configuration table are brought out . in the end , the validity of the proposed methods is tested 論文以sca體系結(jié)構(gòu)驗證實現(xiàn)項目為背景,深入研究了sca專用硬件補(bǔ)充規(guī)范,重點分析了硬件抽象層連接的意義以及它在波形組件開發(fā)中的作用,提出了它在dsp / fpga上實現(xiàn)的方法、步驟;接著從sca波形應(yīng)用的角度描述了硬件抽象層連接在波形開發(fā)中的作用,給出了代理組件如何通過域描述文件和配置表管理專用硬件處理器上算法組件的方法;最后對dsp / fpga上的硬件抽象層連接進(jìn)行了驗證性測試。