In-service hydraulic concrete structure internal loss monitoring and early warning system and method

A hydraulic concrete, monitoring and early warning technology, applied in processing detection response signals, using acoustic wave emission technology for material analysis, instruments, etc., can solve the problem of difficult to achieve accurate positioning of internal damage in large-volume structures, intricate cables, complicated operations, etc. question

Active Publication Date: 2020-09-08
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the conventional practice, each channel requires hundreds of meters of signal cables, and the hundreds of cables are complicated. In addition, cables for other purposes will make site layout and post-operation management quite difficult.
[0005] In addit...

Method used

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  • In-service hydraulic concrete structure internal loss monitoring and early warning system and method
  • In-service hydraulic concrete structure internal loss monitoring and early warning system and method
  • In-service hydraulic concrete structure internal loss monitoring and early warning system and method

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Embodiment 1

[0208] In order to explain the damage localization method of the present invention more clearly, a specific embodiment is provided here. It should be noted that what is provided here is a simplified two-dimensional acoustic emission source localization test, which is intended to provide a further supplementary description of the damage localization method of the present invention, and should not be construed as a limitation of the present invention.

[0209] The hydraulic concrete mix ratio used in the test of the present invention is the concrete mix ratio recommended by a certain dam, as shown in Table 2.

[0210] Table 2 Hydraulic concrete mix ratio

[0211]

[0212] The cement uses P·C32.5R composite Portland cement, the river sand is medium sand with a fineness modulus F.M=2.81, and the coarse aggregate is continuously graded crushed stone with a particle size of 5-25mm.

[0213] The instrument used is mainly the SAMOSTM acoustic emission acquisition instrument develo...

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Abstract

The invention discloses an in-service hydraulic concrete structure internal loss monitoring and early warning system and method. The system comprises a remote workstation, a field workstation and an acquisition early warning system. The acquisition early warning system and the field workstation are communicated in a wireless mode, and the field workstation and the remote workstation are communicated in a wired mode or a wireless mode; the acquisition early warning system is arranged on a monitored hydraulic concrete structure body. According to the provided on-line monitoring and early warningsystem for internal loss of an in-service large-volume hydraulic concrete structure, a wireless energy supply and wireless communication mode is adopted between the acquisition early warning unit andthe field workstation, so that the difficulty of on-site layout and later-period pipe transportation is reduced; acoustic emission sensors are arranged in a key monitoring area in a honeycomb array mode, acoustic emission signals accompanied in the damage process of the hydraulic concrete structure body are comprehensively collected, real-time capture of the internal damage of the in-service large-size hydraulic concrete structure can be achieved, and a damage rapid and accurate positioning method is provided.

Description

technical field [0001] The invention relates to an in-service hydraulic concrete structure internal damage monitoring and early warning system and an online monitoring and early warning method for the in-service hydraulic concrete structure internal damage monitoring and early warning system, belonging to the technical field of monitoring and early warning of large-volume hydraulic concrete structure internal damage . Background technique [0002] A considerable number of hydraulic concrete structures in service in my country, such as dams, sluices, and guardrails, were built earlier, limited by the technology and economic level at that time, and their safety monitoring systems were not perfect. As the service time increases, their work behavior changes quietly, and some even enter the "old" stage. In addition, extreme natural events such as earthquakes and typhoons have occurred frequently in recent years, and the harsh service environment has put forward higher requiremen...

Claims

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Application Information

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IPC IPC(8): G01N29/14G01N29/44
CPCG01N29/14G01N29/44G01N2291/0232G01N2291/106
Inventor 苏怀智周仁练赵海超杨孟
Owner HOHAI UNIV
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