【正文】 ........................................................................................ 5 課題研究內(nèi)容 .................................................................................................. 7 設(shè)計(jì)目的 ................................................................................................... 7 設(shè)計(jì)目標(biāo) ................................................................................................... 7 設(shè)計(jì)內(nèi)容 ................................................................................................... 8 第 2 章 傳感器測(cè)量原理 ........................................................................................... 9 傳感器的定義及構(gòu)成 ...................................................................................... 9 電感傳感器 .................................................................................................... 10 電感式傳感器的特點(diǎn) ............................................................................. 10 電感式傳感器的分類 ............................................................................. 10 本設(shè)計(jì)中傳感器的工作原理 .........................................................................11 第 3 章 系統(tǒng)硬件設(shè)計(jì) ............................................................................................. 15 硬件設(shè)計(jì)原則 ................................................................................................ 15 硬件框架的設(shè)計(jì) ............................................................................................ 15 硬件各模塊的設(shè)計(jì) ........................................................................................ 16 傳感器信號(hào)調(diào)理模塊 ............................................................................. 16 數(shù)據(jù)采集模塊 ......................................................................................... 20 數(shù)據(jù)處理模塊 ......................................................................................... 23 人機(jī)對(duì)話模塊 ......................................................................................... 26 4 存儲(chǔ)模塊 ................................................................................................. 29 外部通訊模塊 ......................................................................................... 32 光柱顯示及其驅(qū)動(dòng)模塊 ......................................................................... 33 單片機(jī)下載調(diào)試模塊 ............................................................................. 36 電源模塊 ................................................................................................. 38 單片機(jī)下載調(diào)試模塊 ........................................................................... 39 第 4 章 軟件系統(tǒng)設(shè)計(jì) ............................................................................................. 41 軟件設(shè)計(jì)原則 ................................................................................................ 41 單片機(jī)系統(tǒng)軟件的設(shè)計(jì) ................................................................................ 42 軟件各模塊的設(shè)計(jì) ........................................................................................ 43 A/D 采樣模塊 .......................................................................................... 43 人機(jī)對(duì)話模塊 ......................................................................................... 44 光柱控制模塊 ......................................................................................... 46 存儲(chǔ)器模塊 ............................................................................................. 47 外部通訊模塊 ......................................................................................... 47 結(jié)論 ........................................................................................................................... 49 致謝 ........................................................................................................................... 50 參考文獻(xiàn) ................................................................................................................... 51 附錄 1 ........................................................................................................................ 53 附錄 2 ........................................................................................................................ 57 附錄 3 ........................................................................................................................ 66 5 第 1章 緒論 課題背景 及來源 機(jī)械零件的形位誤差和尺寸誤差參數(shù) [1]對(duì)產(chǎn)品的使用性能有著重要的影響 ，在進(jìn)行檢測(cè) 時(shí)，傳統(tǒng)方法是采用機(jī)械式量規(guī)、卡尺、千分尺和千分表等量具進(jìn)行測(cè)量。 LED bargraph display。 關(guān)鍵詞 ADμC812； 菜單 結(jié)構(gòu) ； LED 光柱 顯示 ； FPGA； RS485 串口通訊 2 Abstract When measuring subtle differences of the outer sizes of machine parts, the traditional methods have such defects as being singular in measuring function, existing too many errors and having no way to puterize measured data directly. However, these parameters have great influence on products’ attributes. In order to measure these parameters efficiently and accurately, the system used the technology of sensor, automatic acquisition, munication and puter and adopted the design philosophy of modularization, generalization and standardization. We developed this therecolor LED bargraph display measuring instrument which can measure the dimension and runout tolerances of mechanical parts. The system of hardware using the fully integrated 12bit data acquisition system (ADμC812) and FPGA as the LED bar drive circuit to simplify the hardware design and enhance the stability of the hardware. The system of software offers the framework of the function extensibility and the instrument upgrading with the menu operation. At last, we design the serial munication protocol which is high efficiency of data transfer and high performance of fault tolerant to connect with personal puter through the bus of RS485. Also we develop the software of PC to manager the instrument and collect realtime measuring data with work and realize the user interface. The date of measure and configuration