低頻相位測(cè)量系統(tǒng)設(shè)計(jì)計(jì)劃書路復(fù)雜，測(cè)頻精度不夠高；而采用方案二，用為簡(jiǎn)單，而方案二雖然也可以精確控制移相，但是相12)角，當(dāng)兩路信號(hào)的頻率相同時(shí)，相角差θ=φ1-φ2是一個(gè)與時(shí)間無(wú)關(guān)的常數(shù)b位數(shù)，對(duì)32位的計(jì)數(shù)結(jié)果進(jìn)行浮點(diǎn)運(yùn)算使得相位差測(cè)量的分辨率達(dá)到0.1o,其原理D/A儲(chǔ)器地址總線正弦波輸出相幅轉(zhuǎn)換的方式選用查表法，根據(jù)題目的要紅外鍵盤語(yǔ)音播報(bào)液晶顯示數(shù)字式移相信號(hào)發(fā)生器系統(tǒng)框圖值大小。因兩路正弦波產(chǎn)生的原理相同，僅僅是由賽題的要求，在三種不同的輸入頻率下，要求實(shí)現(xiàn)-45o~+45o的連續(xù)移相，且f。當(dāng)頻率f移相電路矢量圖硬件模塊測(cè)試：系統(tǒng)本身由三個(gè)獨(dú)立的模塊的頻率、相位差以及峰-峰值進(jìn)行設(shè)置。最后把產(chǎn)生的有相位差的兩路信號(hào)分別接入90o1.9%0.5%0.2%0.1%0.9%0.2%0.6%0.1%連續(xù)相移圍連續(xù)相移圍-46.78o~+43.12o-45.81o~+41.07o-44.11o~+42.56o峰-峰值圍輸入信號(hào)頻率設(shè)定相位差顯示相位差誤差設(shè)定幅值（V）實(shí)際幅值（V）誤差(%)9.83o44.85o90.42o271.31o359.02o1.71%0.33%0.46%0.19%0.11%0.05%0.25%1.35%1.47%0.25%1.31%2.61%9.10%0.0%1.10%9.10%1.31%2.61%6.25%1.31%2.61%6.25%0.63%1.85%設(shè)定相位差顯示相位差誤差（%）設(shè)定幅值（V）實(shí)際幅值（V）誤差（%）10o9.73o2.7%45o44.27o1.62%90o90.04o0.04%3.25%1.30%1.47%6.25%1.30%0.50%0.0%1.30%1.47%150o150.81o0.54%11.76%0.63%1.85%3.12%270o270.91o0.34%0.62%6.36%6.25%359o359.24o0.06%0.30%1.84%9.96o44.38o90.29o271.68o358.62o0.4%1.37%0.32%0.35%0.6%0.1%3.12%0.9%6.25%1.2%1.85%00.66%0.73%6.25%0.60%1.28%3.12%0.0%1.47%0.0%1.64%2.06%設(shè)定相位差顯示相位差9.96o誤差（%）0.4%設(shè)定幅值（V）5.5V實(shí)際幅值（V）6.25%1.64%1.85%45.82o1.82%3.13%05.76%6.25%90.64o0.7%0.10%2.04%00.19%1.31%7．80%9.10%270.41o0.15%1.64%3.77%3.13%358.85o0.04%3.30%3.38%可調(diào)，人機(jī)交互接口采用雙鍵盤（有線鍵盤＋紅［1］炳和.計(jì)算機(jī)控制系統(tǒng)基礎(chǔ).北京：北京航天航空大學(xué)，2001.［3］彥斌等.凌陽(yáng)十六位單片機(jī)