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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>青浦區(qū)鐵路邊界噪聲檢測服務(wù),噪聲檢測</p><p><span>***更新：</span>2021-01-28 04:21:02</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hvriug7" 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="ck7vceq" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xmyk7vh" class="box"><p><p style="text-indent:25px">區(qū)域噪聲污染控制方法：區(qū)域噪聲能夠?qū)⒊鞘性肼曃廴厩闆r較全反映出來，是一項(xiàng)極其重要的指標(biāo)。尤其是對于市中心而言，車輛數(shù)量較大，道路交通擁擠，若是可以設(shè)置更多過街天橋與人行地道，并對車輛行駛道路范圍作出限制，則能夠讓行人獲得更大的空間。如此一來，可以有效控制車輛的行駛量，減低車輛造成的區(qū)域噪聲污染。做好噪聲管理工作因?yàn)樵肼曃廴揪邆淇陀^性特點(diǎn)，所以無法有效避免，應(yīng)較大限度降低噪聲，確?？刂圃谌藗兡軌虺惺芊秶鷥?nèi)，避免對人們身心健康造成危害。在噪聲污染治理過程中，應(yīng)該學(xué)習(xí)發(fā)達(dá)國家的成功經(jīng)驗(yàn)，采取減少噪聲車輛、合理規(guī)劃城市、優(yōu)化道路設(shè)計、完善制度法規(guī)等。在城市噪聲污染中，青浦區(qū)鐵路邊界噪聲檢測服務(wù)，交通噪聲占據(jù)的比例較大，特別是機(jī)動車。對此需要加強(qiáng)對機(jī)動車噪聲的管理工作，出臺相關(guān)法律法規(guī)，青浦區(qū)鐵路邊界噪聲檢測服務(wù)，在實(shí)踐中不斷作出修改與調(diào)整，保證其適用性與先進(jìn)性，青浦區(qū)鐵路邊界噪聲檢測服務(wù)。選擇測量儀器時，首先應(yīng)根據(jù)測量需要，決定儀器的精度等級和性能規(guī)格。青浦區(qū)鐵路邊界噪聲檢測服務(wù)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)鐵路邊界噪聲檢測服務(wù),噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449325044862253/7947881.png"></div><p style="text-indent:25px">應(yīng)用場景:NVH測試:NVH一般是指汽車制造質(zhì)量的一個綜合性問題，需要將用戶的較直觀的感受分解到汽車各部件的性能上去。各大整車廠近20%的研發(fā)費(fèi)用都是花費(fèi)在車輛的NVH問題上。在當(dāng)前整個汽車行業(yè)不景氣的情況下，加大研發(fā)的投入是所有整車廠的選擇。要解決這個問題，一般需要多點(diǎn)多參數(shù)的同步測試，以便分析各部件的關(guān)聯(lián)關(guān)系。因此要解決NVH問題，測試系統(tǒng)采集和分析同樣重要。目前市面上流行的多通道多參數(shù)的測試系統(tǒng)基本都是國外設(shè)備的天下，且測試軟件都綁定硬件。此類領(lǐng)域測試裝備的特點(diǎn)是：通道數(shù)多，信號分析能力要求高。青浦區(qū)鐵路邊界噪聲檢測服務(wù)波峰因數(shù)是交流電壓的峰值與有效值之比，如正弦波的波峰因數(shù)為。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)鐵路邊界噪聲檢測服務(wù),噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637437362708315622/6158310.png"></div><p style="text-indent:25px">為了降低銑床噪聲，應(yīng)該從齒輪入手，采取了以下幾點(diǎn)措施：（1）提高齒輪加工精度、裝配定位精度，所有齒輪驗(yàn)收時應(yīng)成對檢驗(yàn)，裝配時應(yīng)保證齒輪的定位精度。（2）產(chǎn)生噪聲較大的齒輪零件，可以設(shè)計減重孔，降低固有頻率。齒輪的傳播噪聲主要由端面輻射引起，端面面積越大，噪聲值也越大。設(shè)計減重孔的目的是減少輻射面積，變成腹板式結(jié)構(gòu)，在滿足強(qiáng)度要求前提下，應(yīng)可能的降低重量。（3）為了進(jìn)一步降低傳動噪聲，在某些場合強(qiáng)度要求不高時，可大膽地使用非金屬材料作為選擇齒輪的材料?；ハ鄧Ш淆X輪中，小齒輪用非金屬材料（如尼龍、夾布塑料），大齒輪用金屬材料。（4）選用同一臺齒輪加工機(jī)床所加工出來的齒輪，能夠利于降低嚙合的噪聲。加工完成后要認(rèn)真清洗齒輪棱面的毛刺并防止磕碰傷，因?yàn)槊淘邶X輪嚙合過程中直接產(chǎn)生噪聲。</p><p style="text-indent:25px">噪聲的檢測標(biāo)準(zhǔn)和檢測方法有哪些：1.室內(nèi)標(biāo)準(zhǔn)：室內(nèi)噪聲標(biāo)準(zhǔn)可分為住宅和非住宅兩種。住宅室內(nèi)噪聲標(biāo)準(zhǔn)是根據(jù)生活安靜的要求和所在區(qū)域環(huán)境噪聲標(biāo)準(zhǔn)，參考住宅窗戶條件制定的，一般不應(yīng)低于所在區(qū)域的環(huán)境噪聲標(biāo)準(zhǔn)20分貝。中國住宅室內(nèi)的標(biāo)準(zhǔn)規(guī)定為低于所在區(qū)域環(huán)境噪聲標(biāo)準(zhǔn)10分貝，因?yàn)橹袊鞘杏休^多的小工廠緊靠住宅。非住宅的室內(nèi)噪聲標(biāo)準(zhǔn)，是根據(jù)房間用途規(guī)定的。2.檢測方法：環(huán)境噪聲檢測測量儀器精度為 2 型及2 型以上的積分平均聲級計或環(huán)境噪聲自動監(jiān)測儀器，其性能需符合GB3785 和GB/T 17181 的規(guī)定，并定期校驗(yàn)。測量前后使用聲校準(zhǔn)器校準(zhǔn)測量儀器的示值偏差不得大于0.5 dB，否則測量無效。聲校準(zhǔn)器應(yīng)滿足GB/T 15173 對1 級或2 級聲校準(zhǔn)器的要求。測量時傳聲器應(yīng)加防風(fēng)罩。進(jìn)行噪聲測量時應(yīng)注意對背景聲進(jìn)行修正。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)鐵路邊界噪聲檢測服務(wù),噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324936239188/536607.png"></div><p style="text-indent:25px">早期的測試分析設(shè)備簡單，只能用聲級計、加速度傳感器等來進(jìn)行簡單的噪聲振動測量。當(dāng)電子技術(shù)和信號處理技術(shù)迅速發(fā)展后，出現(xiàn)了頻譜分析、相干分析、相關(guān)分析等，以后又出現(xiàn)了聲強(qiáng)測量、小波分析、聲全息方法等新的測試和分析技術(shù)，這些技術(shù)極大提高了分析噪聲振動譜和識別噪聲振動源的手段。試驗(yàn)測試方法結(jié)果直觀，數(shù)據(jù)準(zhǔn)確，能直接反應(yīng)汽車結(jié)構(gòu)特性，但在結(jié)構(gòu)優(yōu)化控制上不足，常需根據(jù)經(jīng)驗(yàn)來修改結(jié)構(gòu)。常用的試驗(yàn)測試分析方法有分別運(yùn)轉(zhuǎn)消去法、鉛覆蓋法、頻譜分析法、聲強(qiáng)測量法等。噪聲存在于一切電子系統(tǒng)中，嚴(yán)重地影響通信系統(tǒng)接收微弱信號的能力，即影響通信的質(zhì)量。青浦區(qū)鐵路邊界噪聲檢測服務(wù)</p><p style="text-indent:25px">測量聲強(qiáng)或分析噪聲信號時使用聲強(qiáng)計、實(shí)時分析儀等。青浦區(qū)鐵路邊界噪聲檢測服務(wù)</p><p style="text-indent:25px">噪聲檢測：噪聲監(jiān)測是對干擾人們學(xué)習(xí)、工作和生活的聲音及其聲源進(jìn)行的監(jiān)測活動。其中包括：城市各功能區(qū)噪聲監(jiān)測、道路交通噪聲監(jiān)測、區(qū)域環(huán)境噪聲監(jiān)測和噪聲源監(jiān)測等。噪聲監(jiān)測結(jié)果析噪聲污染的現(xiàn)狀及變化趨勢，也為噪聲污染的規(guī)劃管理和綜合整治提供基礎(chǔ)數(shù)據(jù)。一般以A計權(quán)聲級表示，所用的主要儀器是聲級計和頻譜分析器。噪聲監(jiān)測的結(jié)果用于分析噪聲污染的現(xiàn)狀及變化趨勢，也為噪聲污染的規(guī)劃管理和綜合整治提供基礎(chǔ)數(shù)據(jù)。噪聲又稱雜音，屬于隨機(jī)信號，可用統(tǒng)計學(xué)方法加以描述，即其統(tǒng)計量是可測的。噪聲存在于一切電子系統(tǒng)中，嚴(yán)重地影響通信系統(tǒng)接收微弱信號的能力，即影響通信的質(zhì)量。青浦區(qū)鐵路邊界噪聲檢測服務(wù)</p><p style="text-indent:25px">上海綠環(huán)商品檢測有限公司是一家從事商品、環(huán)境、公共衛(wèi)生的檢測及評價服務(wù)；檢測技術(shù)開發(fā)、轉(zhuǎn)讓自研成果，并提供相關(guān)的技術(shù)咨詢和技術(shù)服務(wù)，室內(nèi)空氣檢測，廢氣廢水噪聲監(jiān)測，土壤監(jiān)測，公共場所衛(wèi)生檢測，生活飲用水檢測，空調(diào)通風(fēng)系統(tǒng)檢測與評價等的公司，是一家集研發(fā)、設(shè)計、生產(chǎn)和銷售為一體的專業(yè)化公司。上海綠環(huán)商品檢測作為從事商品、環(huán)境、公共衛(wèi)生的檢測及評價服務(wù)；檢測技術(shù)開發(fā)、轉(zhuǎn)讓自研成果，并提供相關(guān)的技術(shù)咨詢和技術(shù)服務(wù)，室內(nèi)空氣檢測，廢氣廢水噪聲監(jiān)測，土壤監(jiān)測，公共場所衛(wèi)生檢測，生活飲用水檢測，空調(diào)通風(fēng)系統(tǒng)檢測與評價等的企業(yè)之一，為客戶提供良好的環(huán)境監(jiān)測，公共場所衛(wèi)生檢測，建設(shè)工程衛(wèi)生學(xué)評價，室內(nèi)空氣檢測。上海綠環(huán)商品檢測繼續(xù)堅定不移地走高質(zhì)量發(fā)展道路，既要實(shí)現(xiàn)基本面穩(wěn)定增長，又要聚焦關(guān)鍵領(lǐng)域，實(shí)現(xiàn)轉(zhuǎn)型再突破。上海綠環(huán)商品檢測始終關(guān)注儀器儀表市場，以敏銳的市場洞察力，實(shí)現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3043509.html</p></div></div></div></div></div><div id="eizqhof" class="page-right twoColRt"><div id="yhovxjq" class="box01 margin10 clearfix"><h3><a 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