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Online verification device and method for PCCP broken wire acoustic monitoring device

A technology of monitoring device and verification device, which is applied in the direction of measuring device, preparation of test samples, processing of response signals of detection, etc., can solve the problems of commercial application and promotion of localized acoustic fiber optic monitoring system, adverse effects on commercialization and lack of inspection methods, etc. , to achieve the effect of improving the verification effect

Pending Publication Date: 2022-07-22
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0003] In recent years, domestic progress has been made in hardware manufacturing of acoustic optical fiber monitoring system (including acoustic optical fiber itself), software development for corresponding data analysis, etc. It will have adverse effects on the commercial application and promotion of the domestic acoustic fiber optic monitoring system

Method used

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  • Online verification device and method for PCCP broken wire acoustic monitoring device
  • Online verification device and method for PCCP broken wire acoustic monitoring device
  • Online verification device and method for PCCP broken wire acoustic monitoring device

Examples

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Embodiment 2

[0086] Example 2: as figure 1 As shown, the online verification method of the PCCP broken wire acoustic monitoring device provided by this embodiment includes:

[0087] S1. Before the inspection, arrange the acoustic optical fiber 23 to be verified in the pipeline, and use the two exhaust valves B and C along the pipeline to exit the line and reserve a certain length for adjustment. Adjust the length of the optical cable; at least an exhaust valve well or maintenance well with an exhaust valve A should be included between the two outlet ports for arranging the simulated broken wire and the wave guide device 1.

[0088] S2. During the inspection, the broken wire is simulated by simulating the broken wire and the wave guide device 1, and the mechanical vibration signal generated by the broken wire is transmitted into the steel pipe section (exhaust valve metal component) through the probe rod 14 and the anchor bolt, and is then affected by the sound. Fiber 23, vibration sensor ...

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Abstract

The invention relates to an online verification device and method for a PCCP broken wire acoustic monitoring device. The device comprises a broken wire simulation and guided wave device, a distributed acoustic monitoring device, a vibration signal acquisition device and a signal comparison and inspection system. The wire fracture simulation and wave guide device is configured to simulate the fracture process of the prestressed steel wire and transmit a mechanical vibration signal generated by wire fracture to a pipe wall and a water body in the pipe; the distributed acoustic monitoring device is configured to apply a distributed sensing system in the axial direction of the pipeline to detect a mechanical vibration signal generated by the broken wire in real time; the vibration signal acquisition device is configured to detect a mechanical vibration signal generated by wire breakage or a pulsation signal in water in real time on the typical section of the pipeline; and the signal comparison and inspection system is configured to compare and analyze the signals acquired by the distributed acoustic monitoring device and the vibration signal acquisition device, evaluate the hardware sensing precision, the software analysis precision and the positioning error of the distributed acoustic monitoring device, and realize online verification of the distributed acoustic monitoring device.

Description

technical field [0001] The invention relates to an online verification device and method of a PCCP broken wire acoustic monitoring device, and relates to the field of PCCP monitoring. Background technique [0002] Prestressed Concrete Cylinder Pipe (PCCP for short) is a composite pipe composed of several materials such as steel cylinder, high-strength prestressed steel wire, concrete tube core and mortar protective layer. Pulling, steel cylinder impermeability and other characteristics. However, under the action of internal water pressure and earth pressure, the outer wall of the pipeline may crack. Affected by factors such as groundwater and external electric field, the prestressed steel wire inside the pipe wall may be at risk of corrosion and even fracture. By applying acoustic fiber monitoring technology to monitor the number of prestressed steel bar fractures for timely early warning, it is possible to avoid pipe burst accidents. [0003] In recent years, much progre...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/22G01N29/44G01N1/32
CPCG01N29/04G01N29/22G01N29/44G01N1/32G01N2291/023
Inventor 商峰刘毅杨波韦昊南
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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