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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="srov7rd" 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>云南水下通訊系統(tǒng)裝備,水下</p><p><span>***更新：</span>2021-02-05 05:22:45</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ra88efs" 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="3ztfrta" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="vzldpri" class="box"><p><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，云南水下通訊系統(tǒng)裝備。其原理以天體作為參考點(diǎn)，可確定水下潛器的真航向，云南水下通訊系統(tǒng)裝備。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)，云南水下通訊系統(tǒng)裝備。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。水下機(jī)器人聲吶裝備生產(chǎn)公司。云南水下通訊系統(tǒng)裝備</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南水下通訊系統(tǒng)裝備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478028550655810/7377117.png"></div><p> 海洋環(huán)境噪聲噪聲場(chǎng)：海洋不同地區(qū)不同季節(jié)不同種類的噪聲源構(gòu)成的海洋環(huán)境噪聲場(chǎng)，特征不同，通常以噪聲的功率譜、振幅的空間分布和空間相關(guān)性等統(tǒng)計(jì)學(xué)的參數(shù)來表達(dá)，其中研究得較多的是平均功率譜。海洋環(huán)境噪聲的功率譜，是一種連續(xù)譜。各類水下噪聲源在空間的分布是無規(guī)則的，但它們本身都有方向性。海況和氣象條件引起的海面狀況和水文條件的變化及海底特性不同，都會(huì)影響噪聲場(chǎng)的指向性。此外,風(fēng)速和航運(yùn)量的變化,生物噪聲的間歇性，溫度和鹽度的時(shí)空變化，潮汐、晝夜和季節(jié)的影響，都會(huì)使噪聲場(chǎng)呈明顯的周期性或隨機(jī)的變化。四川水下導(dǎo)航設(shè)備國產(chǎn)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="云南水下通訊系統(tǒng)裝備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478028526271005/765235.png"></div><p> 海洋環(huán)境噪聲源：由于水下噪聲場(chǎng)有指向性，故場(chǎng)的時(shí)空相關(guān)特性的研究十分重要。在海底設(shè)置的水聽器陣測(cè)得的0°～90°間的環(huán)境噪聲指向性圖。以頻率為112Hz的噪聲為例，在海面風(fēng)速達(dá)蒲氏風(fēng)級(jí)4級(jí)以上時(shí)，沿水平方向傳播的聲壓譜級(jí)N(0)在-30與-40之間；沿著與水平面成θ角的方向傳播的聲壓譜級(jí)N(θ)都小于N(0)。但對(duì)于頻率為1414Hz的噪聲來說,θ越大，N(θ)越小。由此可知，極遠(yuǎn)處的低頻噪聲通過水平路徑傳播，而高頻噪聲則大多數(shù)從海面?zhèn)鞑サ浇邮贞?。深海噪聲?chǎng)大量的實(shí)測(cè)數(shù)據(jù)表明，深海的環(huán)境噪聲譜相當(dāng)穩(wěn)定。在深海中不同風(fēng)速和不同海況下測(cè)得的，1赫～100千赫的海洋環(huán)境噪聲綜合數(shù)據(jù)繪制的典型連續(xù)譜。 </p><p style="text-indent:25px"> 水下定位導(dǎo)航方法：天文導(dǎo)航法。從1959年美國第1艘導(dǎo)彈核潛艇上的“I型”天文導(dǎo)航潛望鏡、1964年7月裝備在“阿諾德將軍號(hào)”上的FAST星體定位跟*、“享茨維爾”號(hào)測(cè)量船上的NAST系統(tǒng)、1970年裝備在超音速運(yùn)輸機(jī)上的LN - 20、1984年在麥克級(jí)（MIKE)）核潛艇上安裝的“鰭眼”射電六分儀和光學(xué)(天文)定位跟*裝置、1987和1988年對(duì)LN- 20的兩次改進(jìn)，1993年法國凱旋級(jí)彈道導(dǎo)彈核潛艇上的M92型光電六分儀，直到1997年開始服役的NAS-27天文導(dǎo)航單元等等，都是天文導(dǎo)航的實(shí)際應(yīng)用。目前，美軍的B-52、FBⅢ、B- 1B、B- 2A、C - 141A、SR-71、俄羅斯的TU-16、TU - 95、TU - 160等都裝有天文導(dǎo)航設(shè)備。水聲通信裝備生產(chǎn)公司。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南水下通訊系統(tǒng)裝備,水下" src="https://tyunfile.71360.com/UploadFile/ynbltt/637478029006837375/6670506.png"></div><p> 聲吶結(jié)構(gòu)分類：主動(dòng)聲吶。主動(dòng)聲吶技術(shù)是指聲吶主動(dòng)發(fā)射聲波“照射”目標(biāo)，而后接收水中目標(biāo)反射的回波時(shí)間，以及回波參數(shù)以測(cè)定目標(biāo)的參數(shù)。有目的地主動(dòng)從系統(tǒng)中發(fā)射聲波的聲吶稱為主動(dòng)聲吶?？捎脕硖綔y(cè)水下目標(biāo)，并測(cè)定其距離、方位、航速、航向等運(yùn)動(dòng)要素。主動(dòng)聲吶發(fā)射某種形式的聲信號(hào)．利用信號(hào)在水下傳播途中障礙物或目標(biāo)反射的回波來進(jìn)行探測(cè)。由于目標(biāo)信息保存在回波之中，所以可根據(jù)接收到的回波信號(hào)來判斷目標(biāo)的存在，并測(cè)量或估計(jì)目標(biāo)的距離、方位、速度等參量。具體地說，可通過回波信號(hào)與發(fā)射信號(hào)問的時(shí)延推知目標(biāo)的距離，由回波波前法線方向可推知目標(biāo)的方向，而由回波信號(hào)與發(fā)射信號(hào)之間的頻移可推知目標(biāo)的徑向速度。此外由回波的幅度、相位及變化規(guī)律，可以識(shí)別出目標(biāo)的外形、大小、性質(zhì)和運(yùn)動(dòng)狀態(tài)。潛水通話裝備生產(chǎn)公司。云南水下通訊系統(tǒng)裝備</p><p style="text-indent:25px">微型DVL裝備生產(chǎn)公司。云南水下通訊系統(tǒng)裝備</p><p> 水聲通信水下通信非常困難，主要是由于通道的多徑效應(yīng)、時(shí)變效應(yīng)、可用頻寬窄、信號(hào)衰減嚴(yán)重，特別是在長距離傳輸中。水下通信相比有線通信來說速率非常低，因?yàn)樗峦ㄐ挪捎玫氖锹暡ǘ菬o線電波。常見的水聲通信方法是采用擴(kuò)頻通信技術(shù)，如CDMA等。補(bǔ)充：水聲通信技術(shù)發(fā)展的已經(jīng)較為成熟，國外很多機(jī)構(gòu)都已研制出水聲通信Modem，通信方式主要有：OFDM，擴(kuò)頻以及其它的一些調(diào)制方式。此外，水聲通信技術(shù)已發(fā)展到網(wǎng)絡(luò)化的階段，將無線電中的網(wǎng)絡(luò)技術(shù)（AdHoc）應(yīng)用到水聲通信網(wǎng)絡(luò)中，可以在海洋里實(shí)現(xiàn)多方位、立體化通信（可以與AUV、UUV等無人設(shè)備結(jié)合使用），但只有少數(shù)國家試驗(yàn)成功。云南水下通訊系統(tǒng)裝備</p><p style="text-indent:25px">云南保利天同水下裝備科技有限公司位于西山區(qū)環(huán)城西路368號(hào)華海新境界B坐22樓，交通便利，環(huán)境優(yōu)美，是一家貿(mào)易型企業(yè)。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)。保利天同水下裝備順應(yīng)時(shí)代發(fā)展和市場(chǎng)需求，通過**技術(shù)，力圖保證高規(guī)格高質(zhì)量的水聲通訊設(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。</p></p><br /><p>文章來源地址: 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