Underwater operating system circuit of submarine cable fault diving positioning instrument

Abstract

The utility model discloses an underwater operating system circuit of a submarine cable fault diving positioning instrument. A sonic sensor and an electromagnetic wave sensor are connected with a signal conditioning circuit; the signal conditioning circuit is connected with the program control amplifier; the programmable amplifier is connected with the A / D converter, and the programmable amplifier and the A / D converter are connected with the data processing unit; the data processing unit is connected with the LCD display screen, the magnetic control function switches are respectively connected with the data processing unit, the circuit is powered by the battery, and the battery is connected with the power conversion circuit through the magnetic control power switch. The submarine cable fault diving positioning instrument is used for submarine cable fault positioning, is suitable for being used in submarine cable operation and maintenance work, is suitable for being used in the water depth of 50 m, achieves the purpose of final diving confirmation of the most critical submarine cable fault point in submarine cable fault positioning work, is simple, reliable and practical, has good technical and economic benefits, and is suitable for popularization and application. The implementation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of new electric energy technology, and relates to an underwater operating system circuit of a submarine cable fault locating instrument, and specifically to a submarine cable fault locating instrument used in the operation and maintenance of submarine cables for offshore wind power, offshore oil, and island power supply, and uses a magnetically controlled switch to realize the operation method of underwater power on / off and function switches. Background Art

[0002] With the rapid development of new energy offshore wind power, offshore oil, and island power supply, submarine cables have also developed rapidly.

[0003] However, with the rapid development of the economy, marine transportation and fishing have also developed rapidly. Practice has proved that the large iron anchors of ships at sea are the main cause of submarine cables being damaged by external forces and causing submarine cable failures. Newly designed submarine cable projects have mainly adopted trench laying methods to avoid the impact of various large ships on the safety of submarine cable operation, but this new laying method will significantly increase the cost of the project. However, due to the earlier submarine cables laid on the seabed surface and economic reasons, some submarine cables are still laid on the seabed.

[0004] Important higher voltage submarine cables are designed with built-in optical cables to solve both power transmission and communication problems, and such cables can also be used to pre-locate submarine cable faults using optical time domain reflectometry.

[0005] The rapid increase in the use of submarine cables and the busy marine business have easily led to an increase in submarine cable failures, endangering the safe operation of the power grid.

[0006] The emergency repair technology of submarine cable faults must first be able to find the submarine cable fault point in the vast ocean in time. The so-called submarine cable fault positioning mainly refers to the pre-positioning of the submarine cable fault, the verification of the submarine cable route, and the locating of the submarine cable fault.

[0007] At present, due to the lack of targeted technical means, submarine cable fault location mainly applies the instruments and equipment for locating land cable faults to submarine cables.

[0008] Since submarine cables are generally longer, often several kilometers to tens of kilometers in length, and will soon grow to more than 100 kilometers; and because of the complex sea conditions and the changeable climate at sea that affect emergency repair operations, emergency repair of submarine cable faults becomes very difficult. A land cable fault that can be solved in a few hours or a day or two often takes weeks or months to complete for submarine cable repairs, seriously affecting the safety of power transmission and power supply, and the economic cost is huge.

[0009] How to improve the efficiency of locating submarine cable faults and shorten the repair time of submarine cable faults is becoming increasingly important. A set of submarine cable fault locating equipment with proprietary technology is required, which should include a long-length and high-precision submarine cable fault end-to-end pre-locating instrument, a wide-range and high-precision submarine cable fault surface positioning system, a submarine cable fault fixed-point instrument, and a matching lightweight multifunctional high-voltage power supply.

[0010] Among the above four units, the wide-range and high-precision submarine cable fault surface positioning system and the submarine cable fault submersible positioning instrument have special technical performance requirements to adapt to the seawater environment. In particular, the submarine cable fault submersible positioning instrument must first have an anti-corrosion, waterproof, and pressure-bearing sealing structure to adapt to the seawater. At the same time, it must have the technical performance to adapt to the transmission characteristics of electromagnetic wave signals and sound wave signals in seawater and underwater operation and observation. Summary of the invention

[0011] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide an underwater operating system circuit of a submarine cable fault locating instrument for submarine cable fault locating. It is suitable to design a submarine cable fault locating instrument with this utility model. The submarine cable fault locating instrument is used in submarine cable operation and maintenance work, suitable for a water depth of 50m, to achieve the final diving confirmation purpose of the most critical submarine cable fault point in the submarine cable fault locating operation, which is simple, reliable and practical, has good technical and economic benefits, and is easy to implement.

[0012] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0013] An underwater operating system circuit for a submarine cable fault diving point finder, comprising:

[0014] Acoustic wave sensor 1, electromagnetic wave sensor 2, signal conditioning circuit 3, programmable amplifier 4, A / D converter 5, LCD display screen 6, battery 7, magnetically controlled power switch 8, power conversion circuit 9, magnetically controlled function switches 10, 11, 12, 13, 14, data processing unit 15;

[0015] The sensors 1 and 2 are connected to the signal conditioning circuit 3 respectively, the output of the signal conditioning circuit 3 is connected to the program-controlled amplifier 4, the output of the program-controlled amplifier 4 is connected to the A / D converter 5, the output of the A / D converter 5 is connected to the data processing unit 15, the output of the data processing unit 15 is connected to the LCD display screen 6, the data processing unit 15 is also connected to the program-controlled amplifier 4 and the A / D converter 5 to control its operation, the magnetically controlled function switches 10, 11, 12, 13, 14 are connected to the data processing unit 15 respectively, the battery 7 and the magnetically controlled power switch 8 are connected in series to the power conversion circuit 9, and their outputs are used to supply power to each circuit unit;

[0016] The battery 7 and the magnetically controlled power switch 8 are connected in series to the power conversion circuit 9. The magnetically controlled power switch 8 is used to solve the difficulty in operating the power switch of the submarine cable fault diving point finder in a diving environment.

[0017] The magnetically controlled function switches 10, 11, 12, 13, 14 are respectively connected to the data processing unit 15, and the magnetically controlled function switches 10, 11, 12, 13, 14 are used to solve the difficulty of operating the function switches of the submarine cable fault diving point finder in the diving environment;

[0018] The magnetically controlled function switches (10, 11, 12, 13, 14) are used for sensitivity adjustment, expansion and compression adjustment, cursor adjustment, etc., and their number can be increased or decreased according to the design requirements of the diving spot meter.

[0019] The receiving part of the magnetically controlled power switch 8 is installed at a fixed position inside the sealing structure of the fixed-point instrument, and can be operated by a diver carrying a magnet approaching from the outside;

[0020] The receiving parts of the magnetically controlled function switches 10, 11, 12, 13, and 14 are installed at a fixed position inside the sealing structure of the fixed-point instrument, and the transmitting parts are carried by the diver. When the divers place them close to the receiving parts, the transmitting parts will work. The transmitting part is a magnet that is easy to carry.

[0021] The beneficial effects of the utility model are:

[0022] The implementation of the utility model facilitates the underwater power on / off, setting, and adjustment operations of the submarine cable fault submersible locator, and directly confirms the specific and accurate location of the submarine cable fault point underwater. The operation is simple and the judgment is intuitive, which can effectively improve the efficiency of submarine cable fault repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a system schematic diagram of the utility model.

[0024] Among them: acoustic wave sensor 1, electromagnetic wave sensor 2, signal conditioning circuit 3, programmable amplifier 4, A / D converter 5, LCD display 6, battery 7, magnetically controlled power switch 8, power conversion circuit 9, magnetically controlled function switches 10, 11, 12, 13, 14, data processing unit 15. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] As shown in the figure, an underwater operating system circuit of a submarine cable fault locating instrument includes: an acoustic wave sensor 1, an electromagnetic wave sensor 2, a signal conditioning circuit 3, a programmable amplifier 4, an A / D converter 5, an LCD display 6, a battery 7, a magnetically controlled power switch 8, a power conversion circuit 9, magnetically controlled function switches 10, 11, 12, 13, 14, and a data processing unit 15;

[0027] Sensors 1 and 2 are respectively connected to a signal conditioning circuit 3, the output of the signal conditioning circuit 3 is connected to a program-controlled amplifier 4, the output of the program-controlled amplifier 4 is connected to an A / D converter 5, the output of the A / D converter 5 is connected to a data processing unit 15, the output of the data processing unit 15 is connected to an LCD display screen 6, the data processing unit 15 is also connected to the program-controlled amplifier 4 and the A / D converter 5 to control its operation, the magnetically controlled function switches 10, 11, 12, 13, and 14 are respectively connected to the data processing unit 15, the battery 7 and the magnetically controlled power switch 8 are connected in series to a power conversion circuit 9, and their outputs are respectively used to supply power to each circuit unit;

[0028] The battery 7 and the magnetically controlled power switch 8 are connected in series to the power conversion circuit 9. The application of the magnetically controlled power switch 8 can solve the difficulty in power on / off operation of the submarine cable fault diving point finder in a diving environment.

[0029] The receiving part of the magnetically controlled power switch 8 is installed at a fixed position inside the sealing structure of the positioning instrument, and a diver can carry a magnet and approach it from the outside to realize the on / off operation of the submarine cable fault diving positioning instrument in the underwater environment;

[0030] The magnetically controlled function switches 10, 11, 12, 13, 14 are respectively connected to the data processing unit 15. The application of the magnetically controlled function switches 10, 11, 12, 13, 14 can solve the difficulty of operating the function switches of the submarine cable fault diving point finder in the diving environment;

[0031] The magnetically controlled function switches (10, 11, 12, 13, 14) are used for sensitivity adjustment, expansion and compression adjustment, cursor adjustment, etc., and their number can be increased or decreased according to the design requirements of the diving spot meter.

[0032] The receiving parts of the magnetically controlled function switches 10, 11, 12, 13, and 14 are installed at a fixed position inside the sealing structure of the locating instrument. The transmitting parts are carried by divers and are activated by placing them close to the receiving parts, thereby realizing the setting, adjustment, and selection functions of the submarine cable fault diving locating instrument in a diving environment. The transmitting part is a magnet that is easy to carry.

[0033] An underwater operating system circuit of a submarine cable fault diving point finder, its working principle and process:

[0034] The discharge of the submarine cable fault point in the seawater will generate electromagnetic waves and sound waves that propagate into the surrounding seawater. The propagation speeds of electromagnetic waves and sound waves in seawater are different, and the attenuation rates are also different and the difference is huge. The submarine cable fault submersible positioning instrument detects, receives and processes these two signals, automatically calculates the time difference and converts it into the distance to the fault point, displays the signal waveform and the distance to the fault point, and innovatively designs a reasonable sealing structure and a magnetically controlled switch to ensure the performance of the detection technology and underwater use, especially to achieve 50m underwater adjustment operations and LCD display of results.

[0035] 1. Initial setting: Use a magnet to operate the device from the outside of the device close to the marked position of the magnetically controlled power switch to turn it on and check that all functions of the device are normal;

[0036] According to the initial measurement of submarine cable fault location and the pre-positioning results on the water surface, set the appropriate test sensitivity of the positioning instrument. Set low sensitivity for close distances and high sensitivity for far distances to ensure that the positioning instrument can reliably receive the electromagnetic and acoustic wave signals generated by the discharge of the submarine cable fault point;

[0037] According to the initial measurement of the submarine cable fault location and the pre-positioning results on the water surface, an appropriate waveform display compression ratio is set for the positioning instrument. A low compression ratio is set for short distances and a high compression ratio is set for long distances to ensure that the LCD display of the positioning instrument can fully display the electromagnetic wave and sound wave signal waveforms generated by the discharge of the submarine cable fault point.

[0038] 2. Underwater fixed-point confirmation test

[0039] During the test, a high-voltage source needs to work continuously to discharge the fault point of the submarine cable under test to generate electromagnetic and acoustic signals that are then transmitted and propagated into the seawater.

[0040] 2.1 Underwater startup: A diver carries a positioning device and dives to a predetermined underwater position based on the positioning test results of the matching wide-range and high-precision submarine cable fault surface positioning system, and uses a magnet to operate the positioning device to start the device.

[0041] 2.2 Underwater fixed-point test observation: The fixed-point instrument should be able to reliably receive the electromagnetic wave signal and sound wave signal generated by the discharge of the submarine cable fault point in the seawater. The sensors and circuits of the fixed-point instrument receive and process the signal and display its waveform on the LCD screen.

[0042] 2.3 Underwater settings and adjustments. Divers observe the waveform displayed on the LCD of the fixed-point instrument. The waveform is complete and clear, and the amplitude is appropriate. The internal processing circuit and data processing unit of the fixed-point instrument are based on:

[0043] Distance from fault point: S=v*Δt (m)

[0044] v: The speed of sound waves in seawater, in m / s

[0045] Δt: The time difference between the acoustic wave signal and the electromagnetic wave signal received by the fixed-point instrument, unit: s

[0046] The distance between the positioning instrument and the submarine cable fault point is automatically analyzed and calculated and displayed in real time on the positioning instrument LCD screen with a resolution of 0.01m.

[0047] When the sound wave display is incomplete, the diver needs to use a magnet underwater to adjust the waveform compression function switch from the relative position outside the fixed-point instrument to change the waveform display compression ratio so that the sound wave waveform can be displayed completely.

[0048] When the displayed waveform amplitude is too small to be easily observed, or the amplitude is too large to be severely limited, a diver needs to use a magnet underwater to approach the sensitivity adjustment function switch from the relative position outside the fixed-point instrument to change the electromagnetic wave or sound wave test sensitivity of the fixed-point instrument so that the displayed waveform is complete and clear with an appropriate amplitude.

[0049] 2.4 Approaching the submarine cable fault point underwater, the diver moves the fixed-point instrument underwater. According to the change in the distance to the fault point displayed by the fixed-point instrument, the fixed-point instrument is moved closer to the submarine cable fault point. The amplitude of the electromagnetic wave and sound wave signal displayed on the LCD will increase and the distance will decrease.

[0050] 2.5 Confirm the submarine cable fault point underwater. When the distance displayed by the mobile spot meter no longer decreases but increases, this minimum distance should be the actual distance between the spot meter and the submarine cable fault point.

[0051] For submarine cables laid on the seabed, the distance should be as small as 0.01m; for submarine cables laid in trenches, the minimum distance should be the burial depth of the submarine cable under the seabed, that is, the depth of the submarine cable trench here.

[0052] 2.6 Underwater repair or salvage repair of the submarine cable fault point. After the specific location of the submarine cable fault point is confirmed underwater, according to the on-site environment of the submarine cable fault point and the emergency repair construction conditions, arrangements can be made to implement underwater repair of the submarine cable fault point or salvage the faulty submarine cable to the submarine cable construction vessel for repair.

[0053] 2.7 Completed, shut down, and the diver ascends; the high-voltage source working with the pinpointer is depressurized, shut down, and safely and fully discharged; the underwater confirmation pinpointing operation of the submarine cable fault point is completed.

[0054] The implementation of the utility model facilitates the underwater power on and off, setting, adjustment and other operations of the submarine cable fault submersible positioning instrument and the observation of underwater fixed-point test waveforms and distances, and directly confirms the specific and accurate location of the submarine cable fault point underwater. The operation is simple and the judgment is intuitive, which can effectively improve the efficiency of emergency repair of submarine cable faults.

Claims

1. An underwater operating system circuit for a submarine cable fault locating instrument, comprising an acoustic wave sensor (1) and an electromagnetic wave sensor (2), characterized in that: The acoustic wave sensor (1) and the electromagnetic wave sensor (2) are connected to a signal conditioning circuit (3); the signal conditioning circuit (3) is connected to a programmable amplifier (4); the programmable amplifier (4) is connected to an A / D converter (5); the programmable amplifier (4) and the A / D converter (5) are connected to a data processing unit (15); the data processing unit (15) is connected to an LCD display screen (6); the magnetically controlled function switches (10, 11, 12, 13, 14) are respectively connected to the data processing unit (15); the circuit is powered by a battery (7); and the battery (7) is connected to a power conversion circuit (9) via a magnetically controlled power switch (8).

2. The underwater operating system circuit of the submarine cable fault diving point finder according to claim 1 is characterized in that: The receiving part of the magnetically controlled power switch (8) is installed at a fixed position inside the sealing structure of the fixed-point instrument, and is operated by approaching an external magnet.

3. The underwater operating system circuit of the submarine cable fault diving locator according to claim 1 is characterized in that: The receiving part of the magnetically controlled functional switch (10, 11, 12, 13, 14) is installed at a fixed position inside the sealing structure of the fixed-point instrument, and is operated by approaching an external magnet.

4. The underwater operating system circuit of the submarine cable fault diving locator according to claim 1 is characterized in that: The magnetically controlled function switches (10, 11, 12, 13, 14) are used for sensitivity adjustment, expansion and compression adjustment, cursor adjustment, etc., and their number can be increased or decreased according to the design requirements of the diving spot meter.

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