Unlock instant, AI-driven research and patent intelligence for your innovation.

Sample in low-frequency measurement system, and preparation method and using method thereof

A measurement system and sample preparation technology, applied in the field of rock measurement, to achieve the effects of reducing unevenness, easy operation, and not easy to damage

Active Publication Date: 2018-09-28
XI AN JIAOTONG UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many scholars have made progress in measuring wave dispersion and attenuation in the seismic frequency band, there are still many challenges in laboratory stress and strain measurement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sample in low-frequency measurement system, and preparation method and using method thereof
  • Sample in low-frequency measurement system, and preparation method and using method thereof
  • Sample in low-frequency measurement system, and preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The sample preparation method in the low-frequency measurement system provided by the invention comprises the following steps:

[0043] Standard parts will be made first, see image 3 , the standard part 2 includes a lower end body 3-1, a middle cylindrical body 3-2 and an upper end body 3-3 arranged sequentially from bottom to top. Wherein, the middle cylinder 3-2 is a hollow structure, and four second vertical strain gauges 3-6 are evenly pasted on the surface of the middle cylinder 3-2 to achieve the required strain for measuring the sample (average) Young's modulus. . The upper body 3-3 is embedded with a first ultrasonic longitudinal wave probe 3-4 (P wave) and a first ultrasonic transverse wave probe 3-5 (S wave), and the first ultrasonic longitudinal wave probe 3-4 is located on the first ultrasonic transverse wave probe 3-5 above.

[0044] Then mak...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sample in a low-frequency measurement system, and a preparation method and a using method thereof. The sample in the low-frequency measurement system comprises a standard piece, a sample, a vibration source, foil gauges, ultrasonic probes (P wave and S wave) and a hydraulic pressure end, wherein the internal of the standard piece comprises a middle segment cylinder, an upper end and a lower end, the ultrasonic probes (P wave and S wave) are embedded in the upper end, and the middle segment is a hollow structure. The ultrasonic probes (P wave and S wave) are embedded in the lower end of the hydraulic pressure end. Four groups (in a horizontal direction and a vertical direction) of the foil gauges are pasted on the surface of the sample, and the foil gauges of everygroup are equidistantly arranged. The four vertical foil gauges are pated on the surface of the standard piece equidistantly (90 DEG). The hydraulic end, the sample, the standard piece and the vibration source are sequentially piled from top to bottom during earthquake frequency band measurement (2-800 Hz), and a hydraulic pump is used to apply a vertical pre-pressure of 600 Psi through the hydraulic pressure end. The preparation method of the method has the advantages of realization of measurement of the elastic parameter of the earthquake frequency band, high efficiency, and realization ofrepeated measurement.

Description

technical field [0001] The invention belongs to the technical field of rock measurement, and relates to a technology for realizing elastic parameter measurement in a seismic frequency band in a laboratory, in particular to a sample in a low-frequency measurement system, a preparation method and a use method. Background technique [0002] There are many causes of wave dispersion and attenuation, and they have a relative advantage in the frequency range analyzed. Therefore, to a certain extent, the experimental observations help to understand the formation mechanism of the observed phenomena. When a wave passes through a rock containing pore fluid, the disturbance of the wave field will cause a pressure difference between pores with different characteristics. In order to balance the internal pressure of the pore, fluid exchange will occur, resulting in relative motion of the fluid relative to the rock skeleton. The energy is then dissipated due to heat generated by friction, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 李辉韩德华黄琦
Owner XI AN JIAOTONG UNIV