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href="http://www.cdcfah.com/cp/second-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/third-yiqiyibiao_jishuqi/">計(jì)數(shù)器</a>?四川計(jì)數(shù)器咨詢歡迎咨詢寧波奉化光亞計(jì)數(shù)器供應(yīng)</p><div id="ujbdvc3" class="leftbox clearfix"><h1>四川計(jì)數(shù)器咨詢歡迎咨詢寧波奉化光亞計(jì)數(shù)器供應(yīng)</h1><div id="ae2teg2" class="proBig"><div id="z8syvs8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/18867638280/637272259983632813/80306.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dr7xu38" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/18867638280/637272259983632813/80306.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vpwy32r" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>浙江省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>四川計(jì)數(shù)器咨詢</p><p><span>***更新：</span>2020-06-21 23:29:34</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="cwt8yah" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">寧波奉化光亞計(jì)數(shù)器制造有限公司</a></p><p><span>聯(lián)系人：</span>皇甫益敏</p><p><span>郵箱: </span>2218920377@qq.com</p><p><span>電話: </span>18867638280</p><p><span>傳真: </span>0574_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0574-88955915</p><p><span>地址: </span>東郊開(kāi)發(fā)區(qū)圓峰路79號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="kegnpwt" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="sm282my" class="box"><p><p> 激光粒子計(jì)數(shù)器的原理：粒子計(jì)數(shù)器通過(guò)采樣泵抽取采樣氣體。在激光室中，通過(guò)激光照射采樣氣體，顆粒反射出來(lái)的閃光的頻率，象征顆粒的數(shù)量，反射的光強(qiáng)，象征顆粒的粒徑大小。由于激光室中的元器件沒(méi)有鞘氣保護(hù)，因此激光粒子計(jì)數(shù)器應(yīng)該在潔凈環(huán)境下使用，以防止對(duì)激光傳感器的損傷。當(dāng)測(cè)的地方有松散顆粒的材質(zhì)，灰塵源，四川計(jì)數(shù)器咨詢，四川計(jì)數(shù)器咨詢，四川計(jì)數(shù)器咨詢，噴霧處時(shí)，須保持距進(jìn)口管至少十二英寸遠(yuǎn)，以免以上的顆粒及液體污染傳感器及管路。客戶需要根據(jù)自己的使用環(huán)境來(lái)選擇正確的儀器。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川計(jì)數(shù)器咨詢" src="https://tyunfile.71360.com/UploadFile/18867638280/637272259983632813/80306.png"></div><p> 然后根據(jù)需要PWM的頻率范圍確定ATmega128(是ATMEL公司的 8位系列單片機(jī)的比較高配置的一款單片機(jī)，應(yīng)用極其寬泛)定時(shí)/計(jì)數(shù)器的PWM工作方式。AVR定時(shí)/計(jì)數(shù)器的PWM模式可以分成快速PWM和頻率(相位)調(diào)整PWM兩大類。 </p> <p> PWM頻率 = 系統(tǒng)時(shí)鐘頻率/(分頻系數(shù)*(1+計(jì)數(shù)器上限值)) AVR單片機(jī)是1997年由Atmel公司研發(fā)出的增強(qiáng)型內(nèi)置Flash的RISC(Reduced 根據(jù)PWM((脈寬調(diào)制(PWM：(PULSE Width ModulaTIon)是利用微處理器的數(shù)字輸出來(lái)對(duì)模擬電路進(jìn)行控制的一種非常有效的模式))的特點(diǎn)，在使用ATmega128的定時(shí)/計(jì)數(shù)器設(shè)計(jì)輸出PWM時(shí)應(yīng)注意以下幾點(diǎn)， </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川計(jì)數(shù)器咨詢" src="https://tyunfile.71360.com/UploadFile/18867638280/637272259967207032/3659686.png"></div><p> 計(jì)數(shù)器的故障有：來(lái)了脈沖不計(jì)數(shù)、一次計(jì)數(shù)兩個(gè)脈沖、在計(jì)數(shù)過(guò)程中就有顯示結(jié)果等。采用電磁式預(yù)置（數(shù)）計(jì)數(shù)器，可以有效地實(shí)現(xiàn)數(shù)字控制型的自動(dòng)化，并且設(shè)計(jì)簡(jiǎn)單、造價(jià)較低，但是也可能發(fā)生計(jì)錯(cuò)數(shù)及其他意外的情況。所以，既要考慮保護(hù)電路，也要注意維護(hù)保養(yǎng)；另外還要設(shè)置限位開(kāi)關(guān)、采用預(yù)置計(jì)數(shù)器輸出和AND（與門）電路，以防在停止位置發(fā)生誤動(dòng)作。電磁計(jì)數(shù)器由信號(hào)發(fā)出部分（發(fā)動(dòng)開(kāi)關(guān)）、繼電器、計(jì)數(shù)器三個(gè)基本部分所組成。 </p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/343334.html</p></div></div></div></div></div><div id="oiacevs" class="page-right twoColRt"><div id="m8byf7a" class="box01 margin10 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