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    管道檢測服務
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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

    破損點檢測

    采用埋地管道電流測繪系統(PCM)對管道防腐層漏點的檢測定位,管道的防腐層和大地之間存在著分布電容耦合效應,信號電流在管道外防腐層完好時的傳播過程中呈指數衰減規律,當管道防腐層破損后,管中電流便由破損點流入大地,管中電流會明顯衰減,引發地面的磁場強度的急劇減小,由此可對防腐層的破損進行定位。在得到檢測電流的變化情況后,裝配A型架后,儀器便具備了FFL的功能(即外皮破損點定位功能),其工作原理是皮爾松法,也叫地面電場法。地面電場法的原理是指當管道或電纜絕緣層有破損時,給管道施加的電流信號泄漏于周圍土壤中,并且在地面上產生散發性的電場分布,此時用A型架接觸地面,接收機便可測量到這種電場,并能追蹤到破損點的電位。

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