【正文】 .............................. 10 、電阻應變式傳感器的測量電路 ............................................................................. 10 、差動放大電路 ......................................................................................................... 11 、 A/D 轉換 ................................................................................................................ 12 、 ICL7107 雙積分型的 A／ D 轉換器 的特點 ............................................................ 12 、雙積分 A/D 轉換器結構 ....................................................................................... 12 、雙積分 A/D 轉換器電路結構 ................................................................................ 13 、電壓表部分電路應用 ........................................................................................... 14 主要硬件工作原理及選用 .......................................................................................... 14 、電阻應變片 ............................................................................................................ 15 、 彈性體 ................................................................................................................... 16 、 彈性體的選用 ......................................................................................................... 16 、提高靈敏度的措施 ................................................................................................. 19 、應變式傳感器的選用 .............................................................................................. 20 、 結構、形式的選擇 ............................................................................................... 20 、 量程的選擇 .......................................................................................................... 20 、 準確度的選擇 ...................................................................................................... 21 、某些特殊要求應如何達到 ..................................................................................... 21 注 意 事 項 ............................................................................................................. 22 、 機械安裝方面 ......................................................................................................... 22 、 電氣連接方面 ......................................................................................................... 23 儀器的組裝與調試 .................................................................................................... 24 、組成 ...................................................................................................................... 24 、特別注意 ................................................................................................................ 24 、調試過程 ................................................................................................................ 25 、 檢測電路 ............................................................................................................. 25 系統(tǒng)所需元件列表 .................................................................................................... 26 系統(tǒng)方案總結 ........................................................................................................... 26 致 謝 ........................................................................................................................... 27 參考文獻 ........................................................................................................................ 28 6 系統(tǒng)要求 電子秤的 核心部件較為復雜，對工藝的要求很高。通過試驗和創(chuàng)新電阻應變式力傳感器具有以上特點 ! 利用電阻應變式力傳感器制作的數(shù)顯電子秤，具有 測量范圍廣、精度高、誤差小和線性特性好等優(yōu)點，且能在惡劣環(huán)境下工作，在重量測試中有非常廣泛的應用， 易于制作， 簡單實用、成本低廉、體積小巧、攜帶方便等特點。以往稱重傳感器的靈敏度、準確度漸漸跟不上時代的發(fā)展。 傳感器技術是現(xiàn)代科技的前沿技術，是制造業(yè)自動化和 信息化的基礎。目前國際化的趨勢是電子秤向小型化，模塊化，集成化，智能化，其技術性能趨向于速率高，準確度高，穩(wěn)定性該，可靠性高等，其功能趨向是稱重計量的控制信息和非控制信息并重的智能化電子秤。 The electric resistance contingency type spread feeling tool to have diagraph scope wide, accuracy Gao, the error margin be small with line characteristic good etc. advantage, and ability under the bad environment work, in the dint, pressure and the weight test have very extensive of application, the dint spread feeling tool to have structure simple, the physical volume be small, weight light, service life long etc. excellent characteristics. So the electric resistance contingency type dint spread a feeling machine creation of number show electronics steelyard to have an accurate degree Gao be easy to creation, simple practical, the cost be cheap, the physical volume be cleverly made and take convenience etc. characteristics. This text from number show the request of electronics steelyard analysis to mence, be divided into four part, analysis and discussion: the whole system each part of electric circuit principle, control strategy, realizat