an acoustic emission sensor

An acoustic emission sensor and acoustic emission technology, which is applied in the direction of material analysis, instruments, and scientific instruments using acoustic emission technology, can solve the problems of acoustic emission detection limitations, delays in construction period, and extension of project progress, so as to realize reuse and save energy. Monitor costs, ensure effectiveness of coupling effects

CN107132281BActive Publication Date: 2020-01-10SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-01-10

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Abstract

The invention discloses an acoustic emission sensor which comprises an acoustic emission probe, a probe installation mechanism and a transmitting mechanism, wherein the acoustic emission probe is arranged in a probe sleeve, and the acoustic emission probe is in clearance fit with an inner wall of the probe sleeve; a first spring and second springs are arranged between a shell and the probe sleeve; the first spring is arranged in a frame body of the shell, and the first spring is fixedly connected with an end cover on the probe sleeve, and is in a tension state or free state; the two second springs respectively sleeve guide rods in two spring sleeves, and the two second springs are in contact with stopping plates arranged in inner holes of the spring sleeves, and are in a compressed state. According to the acoustic emission sensor disclosed by the invention, the probe installation mechanism solves the problem that an acoustic emission probe cannot be effectively installed and coupled through controllable extension and retraction of the first spring and the second springs which are arranged between the shell and the probe sleeve; thus, reliability of monitoring and predicting mine rock (body) stability and rock burst dynamic disasters is enhanced.
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Description

technical field

[0001] The invention belongs to the technical field of rock (body) engineering safety monitoring in engineering construction, and relates to an acoustic emission sensor. Background technique

[0002] Rock (body) deformation and damage during engineering construction, especially rockburst dynamic disasters, will directly endanger the safety of the project and even cause catastrophic effects. Therefore, effective monitoring and monitoring of rock (body) stability and rockburst dynamic disasters Forecasting is one of the important contents of engineering safety construction. At present, as an important means of non-destructive monitoring, acoustic emission is used in the monitoring and forecasting of rock (body) stability and rockburst dynamic disasters in engineering construction.

[0003] During the excavation and construction of surrounding rocks in underground engineering, in order to accurately predict the possible deformation and damage of surrounding roc...

Examples

Embodiment Construction

[0048] The technical solution of the present invention will be described clearly and completely through the following embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] The acoustic emission sensor provided by this embodiment, such as figure 1 As shown, it includes an acoustic emission probe 3, a probe mounting mechanism, and a transmission mechanism that transmits the combination of the acoustic emission probe and the probe mounting mechanism to a set position in the borehole 18 of the monitored rock mass 17; the probe mounting mechanism and the acoustic emission probe The number of 3 is one; one end of the acoustic emission probe is coated ...