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id="8gzv3zcq3zww" class="content"><p style="text-indent:25px">隨著對(duì)聲納技術(shù)研究的不斷深入，水聲領(lǐng)域的科研工作者開始更加注重如何更好地將合成孔徑技術(shù)應(yīng)用于水聲環(huán)境。寬帶處理是應(yīng)對(duì)復(fù)雜水聲環(huán)境的一項(xiàng)重要手段，國(guó)外的學(xué)者率先將寬帶處理應(yīng)用到了聲納技術(shù)中，De Heering，Gough，RoltZakharia 等人討論了寬帶處理技術(shù)應(yīng)用于聲納的可行性，并提出了多種寬帶合成孔徑處理方法，驗(yàn)證了寬帶合成孔徑技術(shù)的相對(duì)于普通合成孔徑技術(shù)可以提高測(cè)繪速率等諸多優(yōu)點(diǎn)。Billon，Celluza 等人則分別討論了聲納系統(tǒng)設(shè)計(jì)參數(shù)的選取問題與包括風(fēng)浪、多途效應(yīng)、混響等影響聲納性能的因素。上海蘊(yùn)締物流有限公司力于提供聲納，歡迎您的來電！廣東水下聲納技術(shù)</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東水下聲納技術(shù),聲納" src="https://img01.71360.com/w3/d52d0g/20231018/903e5260680a913569f1083b1e7500e1.png?wmk=845901859683176448"></p><p style="text-indent:25px">聲納在民用方面，成像聲吶技術(shù)可用于海洋資源開發(fā)、海底地質(zhì)勘探、海底地形地貌測(cè)繪、水下物體探測(cè)等海洋工程領(lǐng)域；在上，高隱蔽性水下小目標(biāo)(如無人潛器、魚雷、水雷、蛙人等)的探測(cè)與識(shí)別、港口錨地和艦艇的安全防范、地形匹配導(dǎo)航等領(lǐng)域上也迫切要求應(yīng)用高分辨的水下目標(biāo)精細(xì)探測(cè)和成像聲吶技術(shù)[2-4]。目前國(guó)內(nèi)外已有多種先進(jìn)的成像聲吶技術(shù)，主流的主要包括干涉?zhèn)葤呗晠燃夹g(shù)、多波束測(cè)深聲吶技術(shù)及聲納技術(shù)等。目前只有聲波能在水中進(jìn)行遠(yuǎn)距離傳播，聲學(xué)方法也就成為在海中遠(yuǎn)距離觀測(cè)海洋環(huán)境物理參數(shù)的主要手段。貴州拖曳聲納哪家好上海蘊(yùn)締物流有限公司是一家專業(yè)提供聲納的公司，有想法的不要錯(cuò)過哦！</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東水下聲納技術(shù),聲納" src="https://img01.71360.com/w3/d52d0g/20231018/04ddd25c41380c4e31f60bf6fff6738d.png?wmk=845901859683176448"></p><p style="text-indent:25px">合成孔徑(側(cè)掃)聲吶(SAS)與合成孔徑側(cè)視雷達(dá)類似：利用小孔徑水聲換能器，在直線運(yùn)動(dòng)軌跡上均速移動(dòng)，并在確定位置順序發(fā)射，接收并存儲(chǔ)回波信號(hào)。根據(jù)空間位置和相位關(guān)系對(duì)不同位置的回波信號(hào)進(jìn)行相干疊加處理，合成虛擬大孔徑的基陣，從而獲得沿運(yùn)動(dòng)方向的高分辨率。與合成孔徑側(cè)視雷達(dá)相同，合成孔徑(側(cè)掃)聲吶沿運(yùn)動(dòng)方向的水平線分辨率為θsyn＝L/2，其中，L為基陣長(zhǎng)度。該水平線分辨率與頻率無關(guān)，可采用低頻工作；且與距離無關(guān)。到目前為止，成像聲納已經(jīng)形成了一個(gè)大的家族。</p><p style="text-indent:25px">合成孔徑技術(shù)是一種將多波束測(cè)深技術(shù)和合成孔徑技術(shù)相結(jié)合的新型水下目標(biāo)成像技術(shù)，通過載體運(yùn)動(dòng)在航跡向上虛擬合成較大的基陣孔徑，既可以在航跡向上獲取較高的分辨率，用于對(duì)地形地貌的全覆蓋測(cè)量，還可以在距離向上通過波束形成確定目標(biāo)所處的方位，終可以精確地測(cè)量出目標(biāo)的深度信息，對(duì)目標(biāo)進(jìn)行三維成像。多波束合成孔徑技術(shù)的發(fā)展，緊隨著多波束測(cè)深技術(shù)和合成孔徑技術(shù)的發(fā)展趨勢(shì)，結(jié)合二者技術(shù)優(yōu)勢(shì)，實(shí)現(xiàn)水下目標(biāo)的精細(xì)探測(cè)。在這個(gè)發(fā)展過程中，海洋聲學(xué)儀器沒有獨(dú)善其身，反而由于其系統(tǒng)復(fù)雜性，反而成為進(jìn)口儀器的重災(zāi)區(qū)。上海蘊(yùn)締物流有限公司是一家專業(yè)提供聲納的公司，歡迎您的來電哦！</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東水下聲納技術(shù),聲納" src="https://img01.71360.com/w3/d52d0g/20231018/c2ecad3ba1df88adea88c5145d0a25d2.png"></p><p style="text-indent:25px">聲納理論和技術(shù)實(shí)現(xiàn)問題,采用圖像重建、運(yùn)動(dòng)補(bǔ)償與自聚焦、水下數(shù)據(jù)采集與通信、零浮力拖曳等技術(shù),開展了聲納成像算法、拖曳系統(tǒng)、聲納電子設(shè)備、聲納工程整體技術(shù)等研究,突破了高效圖像重建和實(shí)時(shí)信號(hào)處理、寬容的運(yùn)動(dòng)補(bǔ)償和自聚焦、寬帶聲納基陣等關(guān)鍵技術(shù),研制了聲納海試樣機(jī)系統(tǒng),實(shí)現(xiàn)了水下地形地貌和水下目標(biāo)的聲納高分辨率成像。該技術(shù)是具有很好應(yīng)用前景的海洋高新技術(shù),可用于海底測(cè)繪、水下物體搜尋等,尤其是可以進(jìn)行高分辨海底地形地貌測(cè)繪。因此，適合高速平臺(tái)的聲納技術(shù)是未來國(guó)際上重點(diǎn)發(fā)展的方向?；诟咚倨脚_(tái)的聲納對(duì)系統(tǒng)的設(shè)計(jì)、算法的設(shè)計(jì)都提出了很高的要求，一直是該聲吶研制的難點(diǎn)之一。上海蘊(yùn)締物流有限公司為您提供聲納，有想法的可以來電咨詢！江西潛艇聲納聲納</p><p style="text-indent:25px">聲納，就選上海蘊(yùn)締物流有限公司，有想法的可以來電咨詢！廣東水下聲納技術(shù)</p><p style="text-indent:25px">聲納成像的基本原理是距離-多普勒成像原理，用通俗的語言可表述為：用大帶寬信號(hào)獲得距離維的高分辨率，用多普勒頻率獲得橫向距離的高分辨率。實(shí)際上，合成孔徑成像獲取方位向高分辨率的原理是利用小尺寸的聲基陣沿空間（方位向）作勻速直線運(yùn)動(dòng)以合成大的虛擬孔徑，在運(yùn)動(dòng)的過程中以恒定的脈沖重復(fù)間隔發(fā)射并接收信號(hào)，根據(jù)空間位置和相對(duì)關(guān)系將不同位置的回波信號(hào)進(jìn)行相干疊加，進(jìn)而獲得方位向高分辨。到2005年，初步測(cè)算進(jìn)口儀器在我國(guó)海洋儀器市場(chǎng)份額達(dá)到98%。在這個(gè)發(fā)展歷程中，海洋聲學(xué)儀器沒有獨(dú)善其身，反而由于其系統(tǒng)復(fù)雜性，成為進(jìn)口儀器的重災(zāi)區(qū)。廣東水下聲納技術(shù)</p></div> </div> <div id="8gzv3zcq3zww" class="sxp"> <ul> <li>上一篇：<a href="http://plasticsurgerycash.com/Article/29a499966.html" title="惠州梯式橋架廠家">惠州梯式橋架廠家</a> </li> <li>下一篇：<a href="http://plasticsurgerycash.com/Article/22f599972.html" title="石家莊五金五金加工報(bào)價(jià)">石家莊五金五金加工報(bào)價(jià)</a> </li> </ul> </div> </div> </div> <div id="8gzv3zcq3zww" class="left2 bgf5 m-show"> <div id="8gzv3zcq3zww" class="type"> <i></i>熱點(diǎn)新聞 </div> <div id="8gzv3zcq3zww" class="list"> <ul> <li><a href="http://plasticsurgerycash.com/Article/0b499995.html" 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