Method for converting blasting-vibration acceleration into velocity

A technology of blasting vibration and acceleration, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficult to achieve effective conversion, and achieve the effect of being conducive to popularization, overcoming drift phenomenon, and ideal similarity

Active Publication Date: 2012-02-08
ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

Effective conversion between measured velocity and acceleration has so far been difficult

Method used

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  • Method for converting blasting-vibration acceleration into velocity
  • Method for converting blasting-vibration acceleration into velocity
  • Method for converting blasting-vibration acceleration into velocity

Examples

Experimental program
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Embodiment Construction

[0043] The present invention will be further explained below in conjunction with the drawings.

[0044] Such as Figure 1 to Figure 5 As shown, first input a measured acceleration sequence into the computer, the sequence is: X(t), and then follow the steps below to convert acceleration to velocity.

[0045] (1) such as figure 1 As shown, the measured acceleration data sequence is subjected to empirical mode decomposition, and the data sequence is adaptively decomposed into six intrinsic mode functions IMF1 to IMF6 components and a trend term

[0046] X ( t ) = X i = 1 6 c i ( t ) + r 6 ( t )

[0047] Where: X(t) is the original signal, c i (t), i=1...6 is the intrinsic mode function, r 6 (t) is the trend item;

[0048] (2) Perform low-frequency preprocessing on the intrinsic mode function and trend term in step (1)

[0049] a. Trend item r 6 (t) Caused by the temperature drift or zero drift of the vibrometer or sensor, the elim...

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Abstract

The invention discloses a method for converting blasting-vibration acceleration into velocity, which comprises the following steps: firstly, carrying out empirical mode decomposition, low-frequency processing and high-frequency threshold noise reduction processing on an acceleration data sequence; then, obtaining a velocity data sequence through time-domain integration; and finally, respectively carrying out piecewise least-squares correction on components having the drift phenomenon so as to obtain a high-precision velocity data sequence. By using the method for converting blasting-vibration acceleration into velocity disclosed by the invention, the problem of drifting can be effectively solved, and the similarity between a velocity waveform obtained by using the method and an actually-measured velocity waveform is more ideal, therefore, the method can guide the blasting construction better, and is beneficial for popularization.

Description

Technical field [0001] The invention relates to a method for converting blasting vibration acceleration and speed, in particular to a method for converting blasting vibration acceleration to speed. Background technique [0002] At present, engineering blasting technology is widely used in national defense and civil engineering. When blasting operations are carried out around important structures such as slopes, dams, cultural relics, and nuclear power facilities, the blasting vibration (acceleration) speed given in the design needs to be used. The control standard monitors the blasting vibration of the protected object and serves as the design feedback and guidance for blasting construction. [0003] Regarding the physical quantities of blasting vibration, one view is that it is better to monitor with speed as the standard, and to link the seismic wave energy with the stress acting on the structure; another view is that it is better to monitor with acceleration as the standard to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 高振儒方向张卫平陆凡东郭涛刘强龙源范磊李栋
Owner ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH
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