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Device for mounting acoustic emission probe and microseismic probe simultaneously as well as test piece testing method

An acoustic emission and microseismic technology, which is applied to the analysis of solids, instruments, and materials using sonic/ultrasonic/infrasonic waves, can solve problems such as the influence of experimental accuracy, difficulty in collecting damage information, and difficulty in measuring confining pressure. reliability and reliability, increase signal width, and improve comprehensiveness

Inactive Publication Date: 2018-06-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The probe is easy to fall off during the experiment when it is fixed by adhesive tape or fixed by a simple external bracket, and it is impossible to realize real-time signal acquisition. However, ensuring the stability of the probe and the effective coupling with the specimen during the entire experiment is the key to ensure the accuracy of the experiment. When specimens of different sizes are damaged, the acoustic emission or microseismic signals generated have different bandwidths. It is difficult to collect more complete damage information with a single acoustic emission or microseismic probe. Using multiple probes at the same time can increase the acquisition time. Signal width; not only that, tape adhesion or mechanical fixation will often produce a certain confining pressure on the specimen, and the confining pressure is also difficult to measure, which has a certain impact on the accuracy of the experiment

Method used

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  • Device for mounting acoustic emission probe and microseismic probe simultaneously as well as test piece testing method
  • Device for mounting acoustic emission probe and microseismic probe simultaneously as well as test piece testing method
  • Device for mounting acoustic emission probe and microseismic probe simultaneously as well as test piece testing method

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Experimental program
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Effect test

Embodiment 1

[0034] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "inside" and "outside" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and thus should not be construed as limiting the invention. Wherein, "inside" refers to a direction toward the inside of the support base, and "outside" refers to a direction toward the outside of the support base.

[0035] This embodiment provides a device for simultaneously installing an acoustic emission probe and a microseismic probe, including a support base 10, a sliding frame 20, a probe bracket mounting assembly, an acoustic emission...

Embodiment 2

[0044] This embodiment provides a device for simultaneously installing an acoustic emission probe and a microseismic probe. On the basis of the device described in Embodiment 1, the device is specifically designed. Since the commonly used acoustic emission probes have a diameter of 8mm and a diameter of 19mm, microseismic The diameter of the probe is 25 mm, so in this embodiment, the AE probe bracket includes brackets for installing AE probes with a diameter of 8 mm and a diameter of 19 mm; the microseismic probe bracket is a bracket for installing a microseismic probe with a diameter of 25 mm. As shown in the figure, from top to bottom, there are brackets for installing an acoustic emission probe with a diameter of 8mm, a bracket for installing a microseismic probe with a diameter of 25mm, and a bracket for installing an acoustic emission probe with a diameter of 19mm.

[0045] In the bracket for installing an acoustic emission probe with a diameter of 8 mm, the stiffness of t...

Embodiment 3

[0048] This embodiment provides a method for testing a specimen, which is implemented based on the device for simultaneously installing an acoustic emission probe and a microseismic probe described in Embodiment 1, including the following steps:

[0049] S0: Place the pretreated test piece 100 on the fixed point of the test piece, adjust the height of the probe bracket installation assembly according to the height of the test piece 100, install the probe in the inner installation tube 42, lead out the probe cable, and place the probe on the Apply coupling agent on the surface;

[0050] S1, adjust the probe, the inner end surface of the inner installation cylinder 42 is flush with the inner end surface of the outer installation cylinder 41, and the probe is in contact with the surface of the test piece 100 but not close to it, and the spring 44 is in a natural state at this time;

[0051] Screw the adjusting bolt 45 in the outward mounting cylinder 41 until the probe is in clos...

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Abstract

The invention provides a device for mounting acoustic emission probe and microseismic probe simultaneously as well as a test piece testing method, and belongs to the technical fields of rock engineering testing and monitoring. In the device, a first sliding groove and a test piece fixing point are arranged on a supporting pedestal; a second sliding groove vertical to the supporting pedestal is arranged on a sliding frame and the bottom of the second sliding groove is in sliding fit with the first sliding groove; a probe bracket fixing assembly comprises a sliding block arranged on the second sliding groove in a sliding way; mounting holes for mounting an acoustic emission probe bracket and a microseismic probe bracket correspondingly are formed in the sliding block; each of the acoustic emission probe bracket and the microseismic probe bracket comprises an outer mounting cylinder, an inner mounting cylinder, a connecting screw, a spring and an adjusting bolt; the outer mounting cylinder penetrates into the mounting hole; the inner mounting cylinder is sleeved in the outer mounting cylinder, and the outer end of the inner mounting cylinder is connected with the connecting screw; theadjusting bolt is in threaded connection with the outer end of the outer mounting cylinder; and the two ends of the spring are connected with the connecting screw and the adjusting bolt correspondingly. Measurement accuracy and comprehensiveness are improved.

Description

technical field [0001] The invention relates to the technical field of rock engineering testing and monitoring, in particular to a device for simultaneously installing an acoustic emission probe and a microseismic probe and a specimen testing method. Background technique [0002] Acoustic emission and microseismic technologies have been widely used in the testing and monitoring of rock engineering. The laboratory uses acoustic emission devices to monitor the entire destruction process of rocks, concrete and other materials in real time, and can spatially locate the destruction. At present, the installation of acoustic emission probes and microseismic probes in the laboratory is mostly fixed by adhesive tape or mechanically fixed by simple external brackets, but there are still many problems in these methods. The probe is easy to fall off during the experiment when it is fixed by adhesive tape or fixed by a simple external bracket, and it is impossible to realize real-time si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0232
Inventor 段东冯小静任惠亮赵凯雷刘文博陈思顺孙江
Owner TAIYUAN UNIV OF TECH