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id="n88m7sr" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_huanbao/">環(huán)保</a>?<a href="http://www.cdcfah.com/cp/second-huanbao_hjjcyq/">環(huán)境檢測(cè)儀器</a>?<a href="http://www.cdcfah.com/cp/third-hjjcyq_zaoyinjipy/">噪音計(jì)</a>?普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu) 歡迎來(lái)電上海綠環(huán)商品檢測(cè)供應(yīng)</p><div id="k3r3mzo" class="leftbox clearfix"><h1>普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu) 歡迎來(lái)電上海綠環(huán)商品檢測(cè)供應(yīng)</h1><div id="8ew7ip4" class="proBig"><div id="qsfpjfp" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="emj8fm9" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="m33d48m" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu),噪聲檢測(cè)</p><p><span>***更新：</span>2021-02-06 03:18:37</p><p><span id="click" >瀏覽次數(shù)：8次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="uwt4dkj" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海綠環(huán)商品檢測(cè)有限公司</a></p><p><span>聯(lián)系人：</span>程莉君</p><p><span>郵箱: </span>chenglijun139@163.com</p><p><span>電話: </span>18717976244</p><p><span>傳真: </span>021_62384557</p><p><span>網(wǎng)址: </span>http://www.x-gpi.com</p><p><span>手機(jī): </span>021-62398830</p><p><span>地址: </span>綏德路2弄8號(hào)第四層</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="auw4qdx" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="vfmln7n" class="box"><p><p style="text-indent:25px">鉛覆蓋法：用鉛板做出一個(gè)與機(jī)器各部分表面相接近的密封隔聲罩，罩的內(nèi)壁襯有玻璃纖維等吸聲材料，普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)，以減輕罩內(nèi)的混響。測(cè)試時(shí)，用該罩將機(jī)器覆蓋嚴(yán)密，其隔聲量至少要在10dB以上。然后根據(jù)聲源識(shí)別要求，將某部分打開形成小窗口，普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)，使輻射表面的某個(gè)部分暴露出來(lái)，普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)，這樣可在一定距離處測(cè)到機(jī)器暴露部分輻射的聲壓級(jí)。依次打開不同部分測(cè)量其噪聲，從而達(dá)到噪聲源識(shí)別的目的。鉛覆蓋法避免了分別運(yùn)轉(zhuǎn)消去法的一些部件停止轉(zhuǎn)動(dòng)帶來(lái)的不利影響，可以達(dá)到較高的精度，聲源定位也比較精細(xì)，但該法特別費(fèi)時(shí)，試驗(yàn)費(fèi)用較高，另外在低頻段由于覆蓋物的隔聲效果較差，因而容易有較大的測(cè)量誤差。環(huán)境噪聲測(cè)量時(shí)，須注意使用之前應(yīng)使用活塞發(fā)聲器或聲級(jí)校準(zhǔn)器對(duì)聲級(jí)計(jì)進(jìn)行校準(zhǔn)。普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png"></div><p style="text-indent:25px">噪聲的監(jiān)測(cè)注意事項(xiàng)：測(cè)量時(shí)間。①時(shí)間段的劃分。測(cè)量時(shí)間分為：晝間和夜間兩部分。晝間還可以分為：白天、早和晚三部分。具體時(shí)間，可依地區(qū)和季節(jié)不同按當(dāng)?shù)亓?xí)慣劃定。一般采用短時(shí)間的取樣方法來(lái)測(cè)量。白天選在工作時(shí)間范圍內(nèi)（如8：00～12：00和14：00～18：00）；夜間選在睡眠時(shí)間范圍內(nèi)（如22：00～5：00）。②測(cè)量日的選擇。測(cè)量一般選擇在周一至周五的正常工作日，如果周六、日以及不同季節(jié)環(huán)境噪聲有明顯差異，必要時(shí)可要求做相應(yīng)的測(cè)量或長(zhǎng)期連續(xù)測(cè)量。詳細(xì)測(cè)量方法參見《聲學(xué)環(huán)境噪聲的描述、測(cè)量與評(píng)價(jià)靠前部分：基本參量與評(píng)價(jià)方法》（GB/T3222.1—2006/ISO1996—1：2003）、《聲學(xué)環(huán)境噪聲的描述、測(cè)量與評(píng)價(jià)第二部分：環(huán)境噪聲級(jí)測(cè)定》（GB/T3222.2—2009）、《工作場(chǎng)所物理因素測(cè)量第8部分：噪聲》。上海車間噪聲檢測(cè)機(jī)構(gòu)推薦測(cè)量中要考慮背景噪聲的影響。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324890047773/7662206.png"></div><p style="text-indent:25px">以銑床為噪聲檢測(cè)對(duì)象，其噪聲主要形式有：規(guī)律性噪聲，聲音有高有低，齒輪嚙合剛性的規(guī)律性變化對(duì)傳動(dòng)噪聲的影響。嚙合剛性的變化是指齒輪傳動(dòng)中，同時(shí)嚙合齒數(shù)不同，在一兩對(duì)之間變化而引起嚙合輪齒承受載荷的變化。當(dāng)一對(duì)輪齒嚙合時(shí)，所有負(fù)荷均作用于這對(duì)輪齒，會(huì)發(fā)生較大的變形量，噪聲較大；當(dāng)兩對(duì)輪齒嚙合時(shí)，其負(fù)荷由這兩對(duì)輪齒共同承受，每對(duì)輪齒的載荷縮小一半，此時(shí)輪齒會(huì)發(fā)生較小的變形量，噪聲較小。齒輪傳動(dòng)誤差使從動(dòng)齒輪的角速度滯后于主動(dòng)齒輪的角速度，速度的瞬時(shí)變化會(huì)造成在從動(dòng)齒輪齒頂處產(chǎn)生碰擊。在不同的載荷條件下，齒輪傳動(dòng)產(chǎn)生的噪聲大小不同。</p><p style="text-indent:25px">工廠為什么要做噪聲檢測(cè)：噪聲對(duì)人們的生活影響日益嚴(yán)重，噪聲干擾居民的工作、學(xué)習(xí)、休息和睡眠，嚴(yán)重的還會(huì)危害人體的健康。其中工廠噪聲又是城市噪聲的重要來(lái)源。工業(yè)噪聲是指機(jī)械設(shè)備運(yùn)轉(zhuǎn)時(shí)產(chǎn)生的噪聲。按其噪聲源特性可分為：氣流噪聲、機(jī)械噪聲和電磁噪聲。從物理定義而言，振幅和頻率上完全無(wú)規(guī)律的震蕩稱之為噪聲。從環(huán)境保護(hù)角度而論，凡是人們所不需要的聲音統(tǒng)稱為噪聲。糾正錯(cuò)誤觀念，只要聲音大了，即使是音樂(lè)也是噪聲什么是工業(yè)噪聲呢？工業(yè)企業(yè)廠界噪聲的定義：指在工業(yè)生產(chǎn)活動(dòng)中使用固定設(shè)備等產(chǎn)生的、在廠界處進(jìn)行測(cè)量和控制的干擾周圍生活環(huán)境的聲音。人長(zhǎng)期在噪音環(huán)境（75dBA及以上）中工作或生活，會(huì)造成聽覺(jué)疲勞、視力下降，嚴(yán)重者會(huì)造成長(zhǎng)久性聽力損傷，甚至導(dǎo)致噪聲耳聾。同時(shí)，還會(huì)引起惡心、記憶力衰退、心律不齊、血壓波動(dòng)，導(dǎo)致神經(jīng)衰弱，引發(fā)及動(dòng)脈硬化。降低勞動(dòng)生產(chǎn)率：在噪聲環(huán)境中工作，員工情緒煩燥不安，注意力無(wú)法集中，易導(dǎo)致工作失誤，嚴(yán)重影響工作質(zhì)量降低工作效率，甚至造成工傷事故。而且特強(qiáng)噪聲對(duì)儀器設(shè)備和建筑結(jié)構(gòu)的也有嚴(yán)重的危害。噪聲又稱雜音，屬于隨機(jī)信號(hào)，可用統(tǒng)計(jì)學(xué)方法加以描述，即其統(tǒng)計(jì)量是可測(cè)的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324923778264/1912157.png"></div><p style="text-indent:25px">目前的國(guó)內(nèi)聲學(xué)振動(dòng)測(cè)試領(lǐng)域主要存在下面三個(gè)問(wèn)題：一、設(shè)備專業(yè)性高，而懂聲振測(cè)試及分析的從業(yè)人員較少。二、常用的NVH測(cè)試設(shè)備、多通道高精度儀器都是國(guó)外的設(shè)備，軟件和硬件打包售賣，價(jià)格昂貴。三、特殊領(lǐng)域的測(cè)試系統(tǒng)比如高聲強(qiáng)測(cè)試國(guó)內(nèi)無(wú)通用裝備。而很多敏感領(lǐng)域，比如**，航空航天專業(yè)又無(wú)法使用國(guó)外產(chǎn)品。聲學(xué)振動(dòng)測(cè)試行業(yè)格局曾經(jīng)隨著DSP技術(shù)的發(fā)展有過(guò)重大變化，以模擬電路為信號(hào)處理主力的廠家不再有壟斷地位。而當(dāng)前隨著現(xiàn)代社會(huì)的發(fā)展，通信網(wǎng)和互聯(lián)網(wǎng)的普遍推廣和網(wǎng)絡(luò)延伸，同時(shí)智能手機(jī)的普及，各種移動(dòng)設(shè)備處理器的性能突飛猛進(jìn)，已經(jīng)遠(yuǎn)遠(yuǎn)超過(guò)單通道信號(hào)采集和實(shí)時(shí)簡(jiǎn)單處理的運(yùn)算能力要求?？梢韵胂螅c現(xiàn)有的通信網(wǎng)絡(luò)及智能設(shè)備的結(jié)合的聲學(xué)振動(dòng)測(cè)試設(shè)備將是行業(yè)格局變化的一個(gè)新的契機(jī)。測(cè)量聲強(qiáng)或分析噪聲信號(hào)時(shí)使用聲強(qiáng)計(jì)、實(shí)時(shí)分析儀等。普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)</p><p style="text-indent:25px">若放大器的動(dòng)態(tài)范圍足夠，不會(huì)產(chǎn)生測(cè)量誤差。普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)</p><p style="text-indent:25px">加強(qiáng)噪聲檢測(cè)工作的對(duì)策：提高重視程度當(dāng)前我國(guó)對(duì)環(huán)境保護(hù)工作非常重視，也采取了很多積極措施，取得了明顯成效，但是在噪聲檢測(cè)工作上還顯得比較滯后，需要進(jìn)一步加強(qiáng)。對(duì)檢測(cè)站而言，面臨著沉重的噪聲檢測(cè)工作任務(wù)，由于主觀意識(shí)較為薄弱，因此在很大程度上未認(rèn)識(shí)到噪聲檢測(cè)的重要性，主要放在水環(huán)境、大氣環(huán)境等檢測(cè)上。對(duì)此在今后的工作中，需要提高對(duì)噪聲檢測(cè)的重視程度，必須較全、多角度加強(qiáng)控制，從噪聲污染特征出發(fā)，將環(huán)境噪聲檢測(cè)與實(shí)際情況結(jié)合起來(lái)，保證噪聲檢測(cè)結(jié)果的正確性與科學(xué)性。普陀區(qū)道路交通噪聲檢測(cè)機(jī)構(gòu)</p><p style="text-indent:25px">上海綠環(huán)商品檢測(cè)有限公司主要經(jīng)營(yíng)范圍是儀器儀表，擁有一支專業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下環(huán)境監(jiān)測(cè)，公共場(chǎng)所衛(wèi)生檢測(cè)，建設(shè)工程衛(wèi)生學(xué)評(píng)價(jià)，室內(nèi)空氣檢測(cè)深受客戶的喜愛。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。上海綠環(huán)商品檢測(cè)憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來(lái)的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3185161.html</p></div></div></div></div></div><div id="iurbszb" class="page-right twoColRt"><div id="kxuevxz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="z778bdf" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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