TRICONEX 3503E系統(tǒng)結(jié)構(gòu)與關(guān)鍵技術(shù) 

首*行功能分析，規(guī)劃出系統(tǒng)的體系結(jié)構(gòu)，列出各構(gòu)件模塊，然后進(jìn)行底層的具體設(shè)計(jì)，zui后完成系統(tǒng)的整合。測(cè)樁儀的結(jié)構(gòu)示意圖如圖1所示。

TRICONEX 3503E測(cè)樁儀設(shè)備包含的功能模塊有數(shù)據(jù)采集、數(shù)據(jù)處理（含數(shù)字濾波、分析處理、圖形顯示及報(bào)表打?。?、數(shù)據(jù)存儲(chǔ)，外部還需配備擊錘及傳感器。測(cè)樁儀的信號(hào)輸入接口有3個(gè)，分別為速度傳感器、有源和無(wú)源加速度傳感器，它們通過(guò)模擬多路選擇器選定一路有效信號(hào)進(jìn)入模擬低通濾波器。

TRICONEX 3503E濾波后的信號(hào)通過(guò)采樣保持器后分為二路，一路進(jìn)入低精度的模/數(shù)轉(zhuǎn)換比較器，實(shí)時(shí)監(jiān)測(cè)信號(hào)的幅值范圍并報(bào)告給控制單元，由其產(chǎn)生出相應(yīng)的放大系數(shù)，對(duì)可編程放大器進(jìn)行設(shè)置。另一路首先通過(guò)可編程放大器進(jìn)行放大，然后進(jìn)入高精度模/數(shù)轉(zhuǎn)換比較器，zui后由控制單元設(shè)定放大系數(shù)并與放大信號(hào)同步存儲(chǔ)。數(shù)據(jù)采集部分的結(jié)構(gòu)框圖如圖2所示。

一個(gè)采樣周期后，TRICONEX 3503E控制單元向處理器ARM申請(qǐng)中斷，處理器讀取數(shù)據(jù)信息后完成數(shù)據(jù)的預(yù)處理分析和圖形顯示，通過(guò)USB接口向上位機(jī)傳輸數(shù)據(jù)，以獲得完整的數(shù)據(jù)分析和報(bào)表打印服務(wù)。數(shù)據(jù)處理和數(shù)據(jù)存儲(chǔ)部分的結(jié)構(gòu)框圖如圖3所示。

TRICONEX 3503E采樣過(guò)程中，數(shù)據(jù)的放大倍數(shù)與測(cè)量結(jié)果的同步時(shí)序控制是硬件需要解決的關(guān)鍵問(wèn)題。數(shù)字濾波、數(shù)據(jù)分析計(jì)算和指數(shù)放大顯示是軟件需要解決的關(guān)鍵問(wèn)題。

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