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    山東天元信息技術股份有限公司
    地址:東營市東營區南一路228號

    管道測繪

    1)GPS-RTK測量原理

    為了保證測量的高效性和測量的高精度,采用雙頻GPS設備載波相位差分GPS-RTK(Real Time Kinematic)技術進行測繪,RTK測量可以實時提供測站點在指定坐標系中的三維定位結果,并達到厘米級精度。
    RTK測量原理圖如下:

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司

    在RTK作業模式下,基準站通過數據鏈將其觀測值和測站坐標信息一起傳送給移動站,移動站不僅通過數據鏈接收來自基準站的數據,還要采集GPS觀測數據,并在系統內組成差分觀測值進行實時處理。該設備動態平面定位精度10mm+1ppm,高程定位精度20mm+2ppm,可獲得厘米級定位精度,遠遠高于導線測量及三角高程測量所達到的精度。

    2)天元公司自主研發設備介紹

    天元公司結合多年行業經驗,自主研發了的高精度GPS測量設備,并已申請了國家專利。

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司

    設備特點:

    ? 天線集成,設備更輕便,操作采用PDA手簿實現;利用藍牙技術,無連接線;

    ? 利用GPRS網絡進行實時傳輸;

    ? 實時RTK/RTD測量,同時支持靜態測量和后差分處理;

    ? 設備可以輸出 WGS84坐標,北京54坐標和西安80坐標三種格式坐標系數據。

    設備指標:

    ? RTK測量精度為:2cm+1ppm,工作范圍≤50KM,RTK最大支持范圍100KM

    ? RTD測量精度為:<20cm,工作范圍≤100KM,RTD最大支持范圍150KM

    3)全站儀測量

    由于大港油田采油三廠在測量站庫過程中,進行GPS測量時的“多路徑效應”的影響會比較大,甚者會直接影響測量的精度。在這種情況下,可以考慮使用全站儀先進行站庫平面測量,再配合GPS基準站可以獲得較好的測量精度。全站儀實現了測角、測距兩者的同時信息化,儀器內置微處理器,其觀測程序控制、觀測信息處理均由微處理器完成,實現了觀測結果完全信息化、觀測信息處理測站自動化、實時化,并可實現觀測數據的野外實時存儲,以及內業輸出等。和以往的單一的電子測角和電子測距相比,全站儀的特點是觀測信息處理自動化、測站實時化,極大地方便了測量工作。
    其主要功能特點有:

    (1)儀器操作簡單,高效,具有現代測量工作所需的所有功能。

    (2)快速安置。簡單地整平和對中后,儀器一開機后便可工作。儀器具有專門的動態角掃描系統,因此無需初始化。關機后,仍會保留水平和垂直度盤的方向值。電子“氣泡”有圖示顯示并能使儀器始終保持精密置平。

    (3)全站儀設有雙向傾斜補償器,可以自動對水平和豎直方向進行修正,以消除豎軸傾斜誤差的影響。還可進行折光誤差以及溫度、氣壓等改正。

    (4)控制面板具有人機對話功能。控制面板由鍵盤和主、副顯示窗組成。除照準以外的各種測量功能和參數均可通過鍵盤來實現,儀器的兩側均有控制面板,操作十分方便。

    (5)現代全站儀一般具有大容量的內存,并采用國際計算機通用磁卡。所有測量信息都可以文件形式記入磁卡或電子記錄簿。

    (6)具有雙向通信功能,可將測量數據傳輸給電子手簿或外部計算機,也可接受電子手簿和外部計算機的指令和數據。

    4)全站儀測量原理

    全站儀是一種集光、機、電為一體的新型測角儀器,與光學經緯儀比較電子經緯儀將光學度盤換為光電掃描度盤,將人工光學測微讀數代之以自動記錄和顯示讀數,使測角操作簡單化,且可避免讀數誤差的產生。電子經緯儀的自動記錄、儲存、計算功能,以及數據通訊功能,進一步提高了測量作業的自動化程度。

    全站儀與光學經緯儀區別在于度盤讀數及顯示系統,電子經緯儀的水平度盤和豎直度盤及其讀數裝置是分別采用兩個相同的光柵度盤(或編碼盤)和讀數傳感器進行角度測量的。根據測角精度可分為0.5″,1″,2″,3″,5″,10″等幾個等級。

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司

    5)測量精度

    測距精度:2mm+2ppm×D(KM)

    測角精度:2″

    6)作業模式

    ◇ 測記法模式 外業僅采集坐標,內業成圖,需繪制草圖;

    ◇ 編碼法模式 外業采集坐標的同時采集編碼和拓撲信息,以期提高內業成圖自動化;

    ◇ 電子平板模式 野外實時成圖;

    7)常用儀器介紹

    全站儀根據測角精度可分為0.5″,1″,2″,3″,5″,10″等幾個等級,本次測量使用的TKS-202全站儀是拓普康公司2008年最新推出的國產化普及型全中文數字鍵全站儀。該設備為國產普及型,全中文顯示、數字字符鍵,操作簡捷、充足的內存空間,可存儲24000個觀測點或坐標點。可實現外業數據采集數字化、自動化,具有高精度,圖根控制測量和碎部測量一體化等。

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司
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