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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好,噪聲檢測(cè)</p><p><span>***更新：</span>2021-02-01 02:16:46</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qemeukk" 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="y4kuysm" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qkkewsk" class="box"><p><p style="text-indent:25px">噪聲測(cè)定儀的測(cè)量方法及注意事項(xiàng):測(cè)量方法1.使用前準(zhǔn)備裝上電池，將開(kāi)關(guān)置于“電池檢查”位置，30秒鐘后指示燈亮，指針應(yīng)在紅線范圍內(nèi)，否則表示電壓不足，應(yīng)更換新電池。將開(kāi)關(guān)放置在“快”或“慢”檔的位置（根據(jù)需要而定），此時(shí)指針應(yīng)回到－∞處。2，靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好.校正用活塞發(fā)生器校正。將計(jì)權(quán)網(wǎng)絡(luò)開(kāi)關(guān)置于線性位置，順時(shí)針轉(zhuǎn)動(dòng)輸出衰減器（透明旋鈕）轉(zhuǎn)到底，使旋鈕上的兩條紅線對(duì)準(zhǔn)面板上的紅線，靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好，將輸入衰減器（黑色旋鈕）上的l20dB刻度對(duì)準(zhǔn)紅線并在透明輸出旋鈕紅線之間，靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好。將活塞發(fā)生器套在電容傳聲器上，打開(kāi)活塞發(fā)生器電源開(kāi)關(guān)，活塞發(fā)生器即發(fā)出l24±0.2dB聲壓級(jí)的聲音。調(diào)節(jié)微調(diào)電位器，使指針指示出相應(yīng)的聲壓級(jí)讀數(shù)。如無(wú)活塞發(fā)生器，用儀器內(nèi)部電器校正信號(hào)校正。現(xiàn)場(chǎng)采樣人員都要將實(shí)地采回來(lái)的樣品進(jìn)行檢測(cè)。靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324969940385/755914.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(jiàn)《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》。寶山區(qū)住宅噪聲檢測(cè)公司推薦若放大器的動(dòng)態(tài)范圍足夠，不會(huì)產(chǎn)生測(cè)量誤差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637437362708315622/6158310.png"></div><p style="text-indent:25px">我國(guó)環(huán)境噪聲監(jiān)測(cè)布點(diǎn)方法和采樣技術(shù)：我國(guó)環(huán)境噪聲監(jiān)測(cè)布點(diǎn)根據(jù)不同的測(cè)量?jī)?nèi)容選用不同的布點(diǎn)方法。監(jiān)測(cè)道路交通噪聲時(shí)，按自然路段布點(diǎn)；對(duì)區(qū)域環(huán)境噪聲，在測(cè)量區(qū)域內(nèi)按等面積網(wǎng)格法均勻布點(diǎn)；功能區(qū)噪聲定期監(jiān)測(cè)，在每一功能區(qū)內(nèi)，選擇功能特征明顯，替代性強(qiáng)的位置布設(shè)一個(gè)測(cè)點(diǎn)，進(jìn)行晝夜24小時(shí)連續(xù)監(jiān)測(cè)。我國(guó)的環(huán)境噪聲采樣技校術(shù)主要取決于所用噪聲監(jiān)測(cè)儀器的性能，在早期，主要使用指針式聲級(jí)計(jì)監(jiān)測(cè)，隨著噪聲測(cè)量?jī)x器性能的不斷完善，多種具有數(shù)據(jù)存貯和數(shù)理統(tǒng)計(jì)的聲級(jí)計(jì)逐步應(yīng)用于環(huán)境噪聲監(jiān)測(cè)領(lǐng)域。</p><p style="text-indent:25px">噪聲測(cè)量的統(tǒng)計(jì)特性的測(cè)量：滿度波峰因數(shù)和測(cè)量時(shí)間的影響。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。以測(cè)量確知信號(hào)正弦波為例，當(dāng)有效值電壓表指示滿度時(shí)，其寬帶放大器所承受的較大瞬時(shí)電壓（峰值）為有效值的倍，若放大器的動(dòng)態(tài)范圍足夠，不會(huì)產(chǎn)生測(cè)量誤差。所以，對(duì)電壓表中使用的放大器，可用其滿度波峰因數(shù)間接反映放大器的動(dòng)態(tài)范圍般測(cè)量正弦波的電壓表來(lái)說(shuō)，要求電壓表具有的滿度波峰因數(shù)就可勝任。由于噪聲電壓的峰值是隨機(jī)的，即其波峰因數(shù)也是隨機(jī)的，所以，只能用統(tǒng)計(jì)學(xué)方法來(lái)定量描述峰值大于有效值的概率，以高斯白噪聲為例，其峰值是波峰因數(shù)大于4．4出現(xiàn)的概率為0.001%。所以，若電壓表的滿度波峰因數(shù)大于4．4，那么，用來(lái)測(cè)量高斯白噪聲是足夠的，因?yàn)?，這時(shí)電壓表只對(duì)出現(xiàn)概率小于0．001%的那些高峰值不予計(jì)及（被放大器削波），分析指出，由此產(chǎn)生的測(cè)量誤差為-0．05%。進(jìn)行噪聲測(cè)量時(shí)應(yīng)注意對(duì)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="靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324996952097/8201639.png"></div><p style="text-indent:25px">噪聲檢測(cè)要求：1、測(cè)量?jī)x器：測(cè)量?jī)x器精度為II型及II型以上的積分平均聲級(jí)計(jì)或環(huán)境噪聲自動(dòng)監(jiān)測(cè)儀器，其性能需符合《聲級(jí)計(jì)的電、聲性能及測(cè)試方法》(GB 3785—83) 和《積分平均聲級(jí)計(jì)》(GB/T17181—1997)的規(guī)定，并定期校驗(yàn)。測(cè)量前后使用聲校準(zhǔn)器校準(zhǔn)測(cè)量?jī)x器的示值偏差不得大于0.5dB，否則測(cè)量無(wú)效。聲校準(zhǔn)器應(yīng)滿足《聲校準(zhǔn)器》(GB/T15173—94)對(duì)1級(jí)或2級(jí)聲校準(zhǔn)器的要求，測(cè)量時(shí)傳聲器應(yīng)加防風(fēng)罩。2、測(cè)點(diǎn)選擇：根據(jù)監(jiān)測(cè)對(duì)象和目的，可選擇以下3種測(cè)點(diǎn)條件(指?jìng)髀暺魉梦恢?進(jìn)行環(huán)境噪聲的測(cè)量：（1）一般戶外：距離任何反射物(地面除外)至少3.5m外測(cè)量,距地面高度1.2m以上，必要時(shí)可置于高層建筑上，以擴(kuò)大監(jiān)測(cè)受聲范圍。使用監(jiān)測(cè)車輛測(cè)量，傳聲器應(yīng)固定在車頂部1.2m高度處。（2）噪聲敏感建筑物戶外：在噪聲敏感建筑物外，距墻壁或窗戶1m處，距地面高度1.2m以上。（3）噪聲敏感建筑物室內(nèi)：距離墻面和其他反射面至少1m。距窗約1.5m處，距地面1.2~1.5m高。提高齒輪加工精度、裝配定位精度，所有齒輪驗(yàn)收時(shí)應(yīng)成對(duì)檢驗(yàn)。徐匯區(qū)住宅噪聲檢測(cè)價(jià)格</p><p style="text-indent:25px">齒輪的傳播噪聲主要由端面輻射引起，端面面積越大。靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好</p><p style="text-indent:25px">聲強(qiáng)測(cè)量法：當(dāng)聲強(qiáng)探頭在聲源附近移動(dòng)時(shí)，聲波入射角與傳聲器膜片外法向方向?yàn)?0°時(shí)具有較小的方向靈敏度，輸出聲強(qiáng)為0。當(dāng)聲強(qiáng)探頭改變位置并使其夾角小于或大于90°時(shí)，聲強(qiáng)探頭輸出正或負(fù)聲強(qiáng)，且隨夾角增加在0～180°范圍內(nèi)聲強(qiáng)較全值增加。因此，用聲強(qiáng)測(cè)量法能區(qū)分出聲波入射的方向，從而找出噪聲聲源，并可測(cè)量可能聲源的位置。聲強(qiáng)測(cè)量法不需要特殊的聲學(xué)環(huán)境，適宜作現(xiàn)場(chǎng)測(cè)量。由于聲強(qiáng)是矢量，不僅能反映噪聲的大小還表示噪聲的輻射方向，因此測(cè)量汽車或發(fā)動(dòng)機(jī)表面聲強(qiáng)分布就可以知道聲音的輻射情況。但聲強(qiáng)測(cè)量的測(cè)試效率較低，一方面為準(zhǔn)確確定噪聲源不得不選擇適當(dāng)?shù)臏y(cè)點(diǎn)和側(cè)面，進(jìn)行細(xì)致的、多方面的聲強(qiáng)分布研究；而另一方面噪聲大時(shí)多對(duì)應(yīng)于發(fā)動(dòng)機(jī)滿負(fù)荷工作狀態(tài)，由于降溫和通風(fēng)設(shè)施欠缺不允許被試發(fā)動(dòng)機(jī)長(zhǎng)時(shí)間工作于滿負(fù)荷下，而反復(fù)啟動(dòng)一則效率低，二則工況難以一致，給測(cè)量帶來(lái)了許多不便，甚至使試驗(yàn)無(wú)法進(jìn)行。靜安區(qū)工業(yè)噪聲檢測(cè)服務(wù)哪家好</p><p style="text-indent:25px">上海綠環(huán)商品檢測(cè)有限公司致力于儀器儀表，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。上海綠環(huán)商品檢測(cè)深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的環(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)。上海綠環(huán)商品檢測(cè)不斷開(kāi)拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺(tái)，以應(yīng)用為重點(diǎn)，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價(jià)值，提供更優(yōu)服務(wù)。上海綠環(huán)商品檢測(cè)始終關(guān)注自身，在風(fēng)云變化的時(shí)代，對(duì)自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使上海綠環(huán)商品檢測(cè)在行業(yè)的從容而自信。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3101692.html</p></div></div></div></div></div><div id="ekawese" class="page-right twoColRt"><div id="84ouceu" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="6s864kw" 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)" 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