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CN-117213357-B - Submarine cable water inlet angle detection device and method based on strain gauge bending sensor

CN117213357BCN 117213357 BCN117213357 BCN 117213357BCN-117213357-B

Abstract

The invention relates to the technical field of submarine cable submarine angle detection, in particular to a submarine cable submarine angle detection device and a submarine cable submarine angle detection method based on a strain gauge bending sensor, a spring steel sheet submarine cable guide rail is manufactured by adopting the spring steel sheet based on the elastic strain characteristic of the spring steel sheet, the spring steel sheet submarine cable guide rail can be bent along with bending of the submarine cable, normal cable laying of the submarine cable is not affected, and meanwhile, the submarine cable is guided, so that the submarine cable entering the water section is not easy to bend and twist. Based on the high-precision and distributed sensing measurement characteristics of the strain gauge bending sensor on the material structure strain, the strain gauge bending sensor is uniformly stuck on the spring steel sheet submarine cable guide rail at equal intervals, and the bending degree of the submarine cable guide rail is detected by using the strain gauge bending sensor, so that the water inlet angle information in the submarine cable laying process is obtained.

Inventors

  • LI YAN
  • ZHANG ZHIGANG
  • Yu Qianhao
  • ZENG HAO
  • ZHOU DI
  • DU YANG

Assignees

  • 浙江启明海洋电力工程有限公司
  • 国网浙江省电力有限公司舟山供电公司

Dates

Publication Date
20260505
Application Date
20230821

Claims (8)

  1. 1. The submarine cable water inlet angle detection method based on the strain gauge bending sensor is characterized by comprising the following steps of: The submarine cable entry angle detection device based on the strain gauge bending sensor is installed on a cable laying ship and comprises a spring steel sheet submarine cable guide rail (1) which is made of a spring steel sheet, and a plurality of strain gauge bending sensors (2) which are uniformly arranged on the spring steel sheet submarine cable guide rail (1) at equal intervals along the length direction of the spring steel sheet submarine cable guide rail (1), wherein one end of the spring steel sheet submarine cable guide rail (1) is fixed on the cable laying ship; s2, placing the submarine cable on the spring steel sheet submarine cable guide rail (1) and beginning to enter a water cable; s3, outputting measured bending angle values by a plurality of strain gauge bending sensors (2) arranged on the spring steel sheet submarine cable guide rail (1); S4, acquiring the configuration of the submarine cable on the spring steel sheet submarine cable guide rail (1) at the current moment according to a plurality of bending angle values at the current moment; S5, calculating the sea cable water inlet angle at the current moment according to the acquired position shape of the sea cable; The step S4 includes the steps of: S41, matching a plurality of bending angle values at the current moment with a bending angle value standard library, judging whether a bending angle preset value combination with similarity on a preset threshold exists in the bending angle value standard library, if so, entering the next step, and otherwise, giving an alarm, wherein the bending angle value standard library is a first strain gauge bending sensor (2) and second strain gauge bending sensors (2) to (th) calibrated in advance under each allowed submarine cable water inlet angle Bending angle values of the strain gauge bending sensors (2); s42, outputting the submarine cable configuration corresponding to the combination of the preset bending angles with the highest similarity.
  2. 2. The submarine cable water intake angle detection method based on the strain gauge bending sensor according to claim 1, wherein in the step S41, the similarity D i between the plurality of bending angle values at the current time and the i-th group of preset bending angle value combinations in the bending angle value standard library is calculated by the following formula: , Wherein, the A first strain gauge bending sensor (2) and a second strain gauge bending sensor (2) to a first strain gauge bending sensor (2) which represent the current moment Bending angle values of the strain gauge bending sensors (2), Representing the first strain gauge bending sensor (2) and the second strain gauge bending sensors (2) to (i) in the combination of the preset values of the bending angles of the i th group Bending angle values of the strain gauge bending sensors (2).
  3. 3. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 2, wherein in the step S3, when the bending angle value measured by the strain gauge bending sensor (2) exceeds the preset range, an alarm is given, and then the cable laying is stopped.
  4. 4. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 1, wherein the spring steel sheet submarine cable guide rail (1) is of a long guide pipe structure with a small semicircular ring in section, and the inner radius of the small semicircular ring is larger than or equal to the radius of the submarine cable.
  5. 5. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 4, wherein when the spring steel sheet submarine cable guide rail (1) is horizontally placed, the strain gauge bending sensor (2) is symmetrically attached to the bottom of an extrados surface of the long guide pipe structure by taking a tangent line of the long guide pipe structure and a horizontal plane as a symmetry line.
  6. 6. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 4, wherein the distance between two adjacent strain gauge bending sensors (2) on the spring steel sheet submarine cable guide rail (1) is more than or equal to 1 meter and less than or equal to 2 meters.
  7. 7. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 4, wherein the length of the spring steel sheet submarine cable guide rail (1) is between the minimum water inlet angle and the maximum water inlet angle of the submarine cable in safe cable laying.
  8. 8. The submarine cable water inlet angle detection method based on the strain gauge bending sensor according to claim 1 is characterized in that an alarm module is arranged on the strain gauge bending sensor (2), and the alarm module alarms when the bending angle value measured by the strain gauge bending sensor (2) exceeds a preset range.

Description

Submarine cable water inlet angle detection device and method based on strain gauge bending sensor Technical Field The invention relates to the technical field of submarine cable water inlet angle detection, in particular to a submarine cable water inlet angle detection device and method based on a strain gauge bending sensor. Background The submarine cable is easy to bend excessively and twist in the process of cable laying, and the submarine cable structure is easy to damage, so that the submarine cable cannot work normally, and the safety and the reliability in the process of submarine cable laying are seriously jeopardized. The traditional coping method is to use the cable guide cage for the cable laying operation of the sea, but the cable guide cage has the limitation of being only suitable for shallow sea, and the cable guide cage is too heavy, so that the workload of the cable laying operation is greatly increased. The method mainly adopts a catenary cable laying method at present, and specifically comprises the steps of measuring parameters such as a water inlet angle and a plough inlet angle of a cable, and guiding the parameters into a specific model to obtain a catenary cable so as to guide cable laying operation. In submarine cable laying operation, it is important to acquire submarine cable water inlet angles in real time. In many cases, the related staff only judge by experience, and this way is not accurate enough and consumes high labor cost. At present, a mode of three-dimensional reconstruction of the posture of a submarine cable at a water inlet section and then estimation of a water inlet angle is adopted, and the mode has higher requirements on the installation position and shooting quality of a camera, because the submarine cable is in a special underwater environment, the multi-dimensional high-definition camera which does not affect submarine cable laying is difficult and high in cost, and the three-dimensional reconstruction needs to transmit a large-capacity photo in real time, so that the requirement on a communication link is higher, and a large amount of calculation force is consumed to perform image processing. Disclosure of Invention The invention provides a submarine cable water inlet angle detection device and method based on a strain gauge bending sensor, and solves the technical problem of how to simply and accurately measure the submarine cable water inlet angle. In order to solve the technical problems, the invention provides a submarine cable water inlet angle detection device based on a strain gauge bending sensor, which comprises a spring steel sheet submarine cable guide rail manufactured by adopting a spring steel sheet, and a plurality of strain gauge bending sensors uniformly arranged on the spring steel sheet submarine cable guide rail at equal intervals along the length direction of the spring steel sheet submarine cable guide rail, wherein one end of the spring steel sheet submarine cable guide rail is fixed on a cable laying ship. Preferably, the spring steel sheet submarine cable guide rail is arranged into a long guide pipe structure with a small semicircular ring in section, and the inner radius of the small semicircular ring is larger than or equal to the radius of the submarine cable. Preferably, when the spring steel sheet submarine cable guide rail is horizontally placed, the tangent line of the long guide pipe structure and the horizontal plane is taken as a symmetrical line, and the strain gauge bending sensor is symmetrically attached to the bottom of the outer cambered surface of the long guide pipe structure. Preferably, the distance between two adjacent strain gauge bending sensors on the spring steel sheet submarine cable guide rail is more than or equal to 1 meter and less than or equal to 2 meters. Preferably, the length of the spring steel sheet submarine cable guide rail is positioned between the minimum water inlet angle of the safety submarine cable and the length of the submarine cable of the water inlet section of the safety submarine cable. Preferably, an alarm module is arranged on the strain gauge bending sensor, and the alarm module alarms when the bending angle value measured by the strain gauge bending sensor exceeds the preset range. The invention also provides a submarine cable water inlet angle detection method based on the strain gauge bending sensor, which is characterized by comprising the following steps: S1, installing the submarine cable water inlet angle detection device based on the strain gauge bending sensor on a cable laying ship; s2, placing the submarine cable on the spring steel sheet submarine cable guide rail, and beginning to enter the submarine cable; S3, outputting measured bending angle values by a plurality of strain gauge bending sensors arranged on the spring steel sheet submarine cable guide rail; S4, acquiring the position shape of the submarine cable on the submarine cable guide rail of the spring steel