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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>云南省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>四川水下導(dǎo)航定位設(shè)備,水下</p><p><span>***更新：</span>2021-02-06 00:30:39</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="d2spg2r" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">云南保利天同水下裝備科技有限公司</a></p><p><span>聯(lián)系人：</span>肖力夫</p><p><span>郵箱: </span>453901470@qq.com</p><p><span>電話: </span>18206796670</p><p><span>傳真: </span>0871_63578309</p><p><span>網(wǎng)址: </span>http://ynbltt.shop.88360.com</p><p><span>手機(jī): </span>0871-63578309</p><p><span>地址: </span>西山區(qū)環(huán)城西路368號(hào)華海新境界B坐22樓</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="7pgd3pr" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="rqspgnk" class="box"><p><p> 水聲通信：水聲通信（Underwateracousticcommunication）是一項(xiàng)在水下收發(fā)信息的技術(shù)，是當(dāng)前海洋軍*中比較重要和關(guān)鍵的技術(shù)。常見的水聲通信方法是采用擴(kuò)頻通信技術(shù)，如CDMA等。水聲通信的工作原理是將文字、語音、圖像等信息，通過電發(fā)送機(jī)轉(zhuǎn)換成電信號(hào)，并由編碼器將信息數(shù)字化處理后，換能器又將電信號(hào)轉(zhuǎn)換為聲信號(hào)。水聲通信工作原理：水聲通訊示意圖工作原理是首先將文字、語音，四川水下導(dǎo)航定位設(shè)備、圖像等信息，通過電發(fā)送機(jī)轉(zhuǎn)換成電信號(hào)，并由編碼器將信息數(shù)字化處理后，四川水下導(dǎo)航定位設(shè)備，換能器又將電信號(hào)轉(zhuǎn)換為聲信號(hào)。聲信號(hào)通過水這一介質(zhì)，將信息傳遞到接收換能器，這時(shí)聲信號(hào)又轉(zhuǎn)換為電信號(hào)，解碼器將數(shù)字信息破譯后，四川水下導(dǎo)航定位設(shè)備，電接收機(jī)才將信息變成聲音、文字及圖片。海底鷹裝備生產(chǎn)公司。四川水下導(dǎo)航定位設(shè)備</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川水下導(dǎo)航定位設(shè)備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478028536925250/5832326.png"></div><p> 水下定位導(dǎo)航方法：天文導(dǎo)航法。天文導(dǎo)航法是利用對(duì)自然天體的測(cè)量來確定自身位置和航向的導(dǎo)航技術(shù)。由于天體的位置是已知的，測(cè)量天體相對(duì)于導(dǎo)航用戶參考基準(zhǔn)面的高度角和方位角就可計(jì)算出用戶的位置和航向。天文導(dǎo)航系統(tǒng)不需要其他地面設(shè)備的支持，所以是自主式導(dǎo)航系統(tǒng)。不受人工或自然形成的電磁場(chǎng)的干擾，不向外輻射電磁波，隱蔽性好，定位、定向的精度比較高，定位誤差與定位時(shí)刻無關(guān)，因而得到廣泛應(yīng)用。其原理以天體作為參考點(diǎn)，可確定水下潛器的真航向。使天文導(dǎo)航潛望鏡自動(dòng)對(duì)準(zhǔn)天體方向可以測(cè)出水下潛器前進(jìn)方向（縱軸）與天體方向(即望遠(yuǎn)鏡軸線方向)之間的夾角（稱為航向角)。由于天體在任—瞬間相對(duì)于南北子午線之間的夾角(即天體方位角）是已知的。貴州水下儀器多波束聲吶裝備生產(chǎn)公司。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川水下導(dǎo)航定位設(shè)備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478029330636235/8150502.png"></div><p style="text-indent:25px"> 標(biāo)準(zhǔn)水聽器用于液體中作聲學(xué)測(cè)量的電聲接收換能器，它的靈敏度經(jīng)過準(zhǔn)確校準(zhǔn)的，其聲學(xué)性能應(yīng)符合所規(guī)定的要求。目前在各種水聽器中只有用壓電晶體或壓電陶瓷作敏感元件的壓電型水聽器適合作標(biāo)準(zhǔn)水聽器。國際電工委*會(huì)（IEC）制定的國際標(biāo)準(zhǔn)“IEC-500（1974）《標(biāo)準(zhǔn)水聽器》”對(duì)壓電型標(biāo)準(zhǔn)水聽器的聲學(xué)性能作出規(guī)定,如:靈敏度應(yīng)在－180～－200dB(0dB1V/µPa)之間；頻響特性在三個(gè)十倍程范圍內(nèi)起伏不大于±1.5dB;動(dòng)態(tài)范圍大于60dB；時(shí)間穩(wěn)定性為一年校準(zhǔn)一次而無可覺察的變化；水平方向的指向性是無向的，其偏差不超過+0、-3dB；以及靈敏度隨靜壓（水深）、溫度等的許可變化范圍。</p><p> 現(xiàn)代水下導(dǎo)航技術(shù)發(fā)展趨勢(shì)：隨著現(xiàn)代軍*技術(shù)的不斷發(fā)展，水下導(dǎo)航必須適應(yīng)現(xiàn)代潛艇戰(zhàn)略和戰(zhàn)術(shù)的要求，能夠?yàn)闈撏?shí)施長時(shí)間隱蔽航行提供實(shí)時(shí)準(zhǔn)確的導(dǎo)航信息。潛艇導(dǎo)航技術(shù)與其他導(dǎo)航技術(shù)相比具有更為明顯的軍*特征，因此它的發(fā)展在符合導(dǎo)航系統(tǒng)發(fā)展總方向的前提下將具有自己獨(dú)特的趨勢(shì)。根據(jù)潛艇軍*行動(dòng)的要求，GPS系統(tǒng)在未來戰(zhàn)*中可能誰都無法使用，應(yīng)注重研究和實(shí)施兩種以上導(dǎo)航體制并存的格局，為此未來水下潛艇導(dǎo)航技術(shù)將仍以慣性導(dǎo)航技術(shù)為基礎(chǔ)的導(dǎo)航技術(shù)，結(jié)臺(tái)無源重力、海底地形匹配、天文以及水聲等導(dǎo)航新技術(shù)實(shí)施潛艇綜合導(dǎo)航。水下救援裝備生產(chǎn)公司。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川水下導(dǎo)航定位設(shè)備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478028580704624/953509.png"></div><p style="text-indent:25px"> 聲吶結(jié)構(gòu)分類：被動(dòng)聲吶。聲吶設(shè)計(jì)者只能對(duì)某預(yù)定目標(biāo)的聲音進(jìn)行設(shè)計(jì)，如目標(biāo)為潛艇，那么目標(biāo)自身發(fā)出的噪聲包括螺旋槳轉(zhuǎn)動(dòng)噪聲、艇體與水流摩擦產(chǎn)生的動(dòng)水噪聲，以及各種發(fā)動(dòng)機(jī)的機(jī)械振動(dòng)引起的輻射噪聲等。因此被動(dòng)聲吶（噪音站）與主動(dòng)聲吶比較根本的區(qū)別在于它在本艦噪聲背景下接收遠(yuǎn)場(chǎng)目標(biāo)發(fā)出的噪聲。此時(shí)，目標(biāo)噪聲作為信號(hào)，且經(jīng)遠(yuǎn)距傳播后變得十分微弱。由此可知，被動(dòng)聲吶往往工作于低信噪比情況下，因而需要采用比主動(dòng)聲吶更多的信號(hào)處理措施。被動(dòng)聲吶沒有發(fā)射機(jī)部分?；匾粽?、測(cè)深儀、通信儀、探雷器等等均可歸入主動(dòng)聲吶類，而噪音站、偵察儀等則歸人被動(dòng)聲吶類。圖像聲吶裝備生產(chǎn)公司。貴州水下儀器</p><p style="text-indent:25px">遠(yuǎn)距離探測(cè)聲吶裝備生產(chǎn)公司。四川水下導(dǎo)航定位設(shè)備</p><p> 聲吶工作原理：聲波是觀察和測(cè)量的重要手段。有趣的是，英文“sound”一詞作為名詞是“聲聲吶模式”的意思，作為動(dòng)詞就有“探測(cè)”的意思，可見聲與探測(cè)關(guān)系之緊密。在水中進(jìn)行觀察和測(cè)量，具有得天獨(dú)厚條件的只有聲波。這是由于其他探測(cè)手段的作用距離都很短，光在水中的穿透能力很有限，即使在清澈的海水中，人們也只能看到十幾米到幾十米內(nèi)的物體；電磁波在水中也衰減太快，而且波長越短，損失越大，即使用大功率的低頻電磁波，也只能傳播幾十米。然而，聲波在水中傳播的衰減就小得多，在深海聲道中爆*一個(gè)幾公斤的炸*，在兩萬公里外還可以收到信號(hào)，低頻的聲波還可以穿透海底幾千米的地層，并且得到地層中的信息。在水中進(jìn)行測(cè)量和觀察，迄今還未發(fā)現(xiàn)比聲波更有效的手段。四川水下導(dǎo)航定位設(shè)備</p><p style="text-indent:25px">云南保利天同水下裝備科技有限公司主營品牌有保利天同,保利水下,海底鷹,標(biāo)準(zhǔn)水聽器,水聲通訊,水下導(dǎo)航定位,水聲圖像,水下港口安防，發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大，該公司貿(mào)易型的公司。保利天同水下裝備是一家有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會(huì)”的經(jīng)營理念;“誠守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。公司擁有專業(yè)的技術(shù)團(tuán)隊(duì)，具有水聲通訊設(shè)備，水下導(dǎo)航定位設(shè)備，水聲圖像設(shè)備，水下港口安防設(shè)備等多項(xiàng)業(yè)務(wù)。保利天同水下裝備將以真誠的服務(wù)、創(chuàng)新的理念、***的產(chǎn)品，為彼此贏得全新的未來！</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/3180922.html</p></div></div></div></div></div><div id="gvsuryf" class="page-right twoColRt"><div id="shegnuw" 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