Summary of submarine cable detection technology

  Some time ago , The blogger communicated with the technicians of Suzhou Santai for a while , Know that their synthetic aperture sonar can also detect submarine cables . Their synthetic aperture sonar is similar to side scan sonar , Obtain an acoustic image with a certain scanning width , Compared with side scan sonar , There are two advantages ： The detection range includes not only the water body and the sea bottom , It also includes a certain depth below the sea floor （ Less than 10m）; The detection resolution is higher than that of side scan sonar . The following picture is a screenshot of submarine cable detection , Very clear .

        Later, a unit asked about the leakage of the submarine plastic water pipe , Is there any way to detect the position . Santai technicians said that if the medium in the pipeline is water , It is difficult to detect , But the medium is changed into gas , Detection may be easier .

        The blogger unit recently bought a submarine cable detector , Model is TC100. This detector was developed by the team of Professor Zuo of Wuhan University , The principle is to obtain the position of the cable by detecting the electromagnetic signal . The following picture is the image of the submarine cable detector passing through the submarine cable , Depth in the picture V Represents the cable location . Because the submarine cable detector can not be connected GPS, The cable is positioned by Hypack Manual marking .

        The above picture is provided by lushengqiang, an engineer of Qingdao Zhuojian . A few days ago they had a cable detection project , The equipment used is this submarine cable detector . It can only provide the location of the submarine cable , The buried depth value of submarine cable cannot be provided . therefore , The project also uses the SBI（subbottom imager）, namely 3D Shallow profiler , It is used to provide the burial depth of submarine cables . The following picture shows the China Kuwait exploration sea SBI Image .

      The benchmark of this equipment of China Science and technology exploration sea is PanGeo The company's SBI, See the following figure for the equipment ：

        According to its official website , This device has the following characteristics for detecting buried objects on the sea floor ：

       1） The accuracy of burial depth is better than 10cm

       2） The submarine cable does not need to be powered off during detection

       3） The depth of detection can reach the bottom of the sea 5m

       4）  The environment is adaptable , Whether deep or shallow .

   

       except SBI outside , There is another device for detecting buried submarine cables TS440, Generally carried on ROV Use , See the picture below . TSS440 It's England TSS The company produces submarine cable tracking system , Its essence is to measure the geometric characteristics of the spatial distribution of the alternating magnetic field of the live cable , Calculate the position and buried depth of the cable . therefore , This device can directly get the position and buried depth of the submarine cable .