A method for measuring wave velocity changes based on acoustic emission
By using three wave speed measurement and variable wave speed positioning methods in concrete structures, the problem of low positioning accuracy caused by fixed wave speed in the prior art is solved, and a higher damage positioning accuracy is achieved.
CN115166057BActive Publication Date: 2025-03-18JIANGSU UNIV
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202210914421.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-01
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2042-08-01
AI Technical Summary
Technical Problem
The existing acoustic emission technology uses fixed surface wave velocity in the damage positioning of concrete structures, resulting in a large difference between the detection results and the actual situation, affecting the positioning accuracy.
Method used
Three wave velocities (surface wave, off-surface wave, pair-passing wave) are used to measure at different loading stages, and variable wave velocity positioning is used to select the optimal wave velocity through positioning accuracy.
Benefits of technology
The accuracy of damage positioning recognition is improved, the disadvantages of large errors in traditional positioning methods are overcome, and technical guidance is provided for new wave velocity for structural damage positioning.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a wave velocity change measurement method based on acoustic emission, comprising the following steps: (1) first determining three wave velocity measurement methods of surface wave, out-of-plane wave and through-wave; (2) sensor arrangement, in order to measure the three wave velocities, the sensors are respectively placed on the front elevation, left elevation and rear elevation of the concrete specimen, and two sensors are installed on each surface; (3) a lead breaking experiment is performed around each sensor, and the wave velocity between different sensors is measured using the acoustic emission signal generated by the lead breaking; (4) the concrete specimen is loaded in stages, and the step (3) is repeated at each loading and unloading completion stage, so that the three wave velocities can be obtained. The present invention provides a new method and idea for acoustic emission positioning accuracy and reinforcement of damage positions by studying the changes in the wave velocities of the three waves in different loading stages, and can be applied to the detection of structural damage positions.
Need to check novelty before this filing date? Find Prior Art