【正文】 bVIEW軟件接收和顯示 。在設(shè)計(jì)中是 利用 LabVIEW提供的串行通信功能將單片機(jī)系統(tǒng)與 PC 機(jī)結(jié)合 ,既充分利用了 LabVIEW的強(qiáng)大功能 ,又降低了系統(tǒng)開(kāi)發(fā)成本 ,擴(kuò)展了 LabVIEW的應(yīng)用。 關(guān)鍵字：數(shù)據(jù)采集， ADC0809，單片機(jī)，串口通信， LabVIEW 福州大學(xué)本 科生畢業(yè)設(shè)計(jì)（論文） 2 The designing of materials testing system based on the LabVIEW—— Load measurement Abstract LabVIEW is the NI pany’s graphic programming language that is able to fulfill ability on handling realtime data and showing. But the LabVIEW data collect card’s price is very expensive, the system which is base on the software nucleus of LabVIEW designing and the hardware nucleus of ADC0809 and AT89C51 to be design for material test. The whole material test system poses four parts: collect signal, blow up and condition signal, transform and transmit signal, incept and display on the pute of LabVIEW. First, in the designing, use loading sensor LRK to collect the signal of the pull force, export by bridge, get across the instrument amplifier blows up the delicacy voltage signal, put the conditional signal into the ADC0809 to convert, then send the data from the SCM’s serial interface to PC, take over by the LabVIEW on the pute, and display realtimely the magnitude of the loads and the curve of the wave. While the designing, it uses the serial munication’s functions of the LabVIEW to bine the PC and SCM system. On the one hand, it makes full use of the formidable functions of the LabVIEW, in the other hand, it depresses the price of system of exploitation, enlarge the applications of the LabVIEW. This design mainly gains the reasonable data go through the constantly testing in the lab. As the software is convenient for controlling, easy for conducting, take a little up space, and go through a serial of the debug and experiments, it proves that the testing system with the advantages of the intelligent, high reliability and realtime, is able to petent for the measure of the material’s testing system—— load measuring. Key Words: Data collection, ADC0809, SCM, serial munication, LabVIEW 基于 LabVIEW 的材料測(cè)試系統(tǒng)設(shè)計(jì) —— 載荷測(cè)量 3 目 錄 摘要 ................................................................................................................................................... I Abstract ...........................................................................................................................................II 第 1 章 緒論 .................................................................................................................................... 1 引 言 .......................................................................................................................................... 1 研究的背景和意義 ................................................................................................................ 1 本設(shè)計(jì)所做的工作 ................................................................................................................ 2 難點(diǎn)與重點(diǎn) .......................................................................................................................... 3 第 2 章 硬件設(shè)計(jì) ............................................................................................................................... 4 信號(hào)采集 .............................................................................................................................. 4 放大器及其調(diào)理電路 ............................................................................................................ 4 A/D 轉(zhuǎn)換及其接口方法 ....................................................................................................... 6 A/D 轉(zhuǎn)換器的選取 ..................................................................................................... 6 ADC0809內(nèi)部功能與引腳介紹 .................................................................................. 7 ADC0809的時(shí)序邏輯 .............................................................................................. 10 ADC0809與單片機(jī)的接口和工作 .............................................................................11 串行口通信 ........................................................................................................................ 12 MAX232簡(jiǎn)介 ......................................................................................................... 12 RS232 接口標(biāo)準(zhǔn) ..................................................................................................... 13 RS232 串行接口標(biāo)準(zhǔn) .............................................................................................. 14 RS232 的電氣特性 ................................................................................................. 14 第 3 章 虛擬儀器的概述 .................................................................................................................. 15 虛擬儀器的概念 ................................................................................................................. 15 虛擬儀器的特點(diǎn)及優(yōu)勢(shì) ....................................................................................................... 15 虛擬儀器和傳統(tǒng)儀器的比較 ................................................................................................ 16 虛擬儀器 測(cè)試系統(tǒng)的組成 ................................................................................................... 17 第 4 章 軟件設(shè)計(jì) ........................................................................................................................... 19 LabVIEW 設(shè)計(jì) .................................................................................................................... 19 前面板設(shè)計(jì) ........................................................................................................................ 19 后面板設(shè)計(jì) ........................................................................................................................ 20 結(jié) 論 ...............................................................................................................