Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus for identifying asymmetric waveform in strong earthquake record

An asymmetric waveform and waveform technology, applied in measurement devices, seismology, seismic signal processing, etc., can solve problems such as poor symmetry and affect the reliability of seismic analysis results, and achieve accurate data, simple judgment criteria, and improved reliability. Effect

Active Publication Date: 2017-06-20
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual strong earthquake observation work, due to the influence of many factors (impact on the upper structure of the observation station, the amplification effect of a certain direction of the soil layer, the uncorrected error of the instrument itself, etc.), the records obtained are often special. image 3 For example, the acceleration time-history record curve shows obvious asymmetry (that is, the symmetry of the history curve graph is poor on the baseline), and if the abnormal data cannot be eliminated, the seismic analysis results will be greatly affected reliability

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
  • Method and apparatus for identifying asymmetric waveform in strong earthquake record
  • Method and apparatus for identifying asymmetric waveform in strong earthquake record
  • Method and apparatus for identifying asymmetric waveform in strong earthquake record

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] In this embodiment, step S3 can be implemented in various ways, such as: using the integral rule of curved trapezoid to calculate the integral of the acceleration time history curve above and below the baseline, and judge the symmetry according to the calculated integral. In order to reduce the amount of computation and improve screening efficiency, this embodiment provides a preferred implementation of step S3, including the following steps:

[0049] Step S31, calculate the sum of all elements in the first array, denoted as A 1 .

[0050] Step S32, calculate the sum of all elements in the second array, denoted as A 2 .

[0051] Step S33, according to A 1 and A 2 , to determine whether the graph drawn by the acceleration data is a symmetrical waveform.

[0052] Wherein, there are many ways to implement step S33, and this embodiment provides a preferred implementation of step S33: calculate DIF=(A 1 +A 2 ) / (A 1 -A 2 ), if DIF is greater than or equal to the firs...

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 relates to a method and apparatus for identifying an asymmetric waveform in a strong earthquake record. The method comprises: carrying out base line initialization on acceleration data in an obtained strong earthquake record; classifying corrected acceleration data into a first array and a second array by using a base line as a benchmark; carrying out a preliminary symmetry analysis on the first array and the second array and determining whether a graph drawn by the acceleration data is a symmetrical waveform; and if so, carrying out a precise symmetry analysis on the first array and the second array and determining further whether the graph drawn by the acceleration data is a symmetrical waveform. According to the method and apparatus provided by the invention, advantages of two kinds of symmetric analysis methods are combined; and the identification efficiency can be guaranteed and the screening accuracy can be improved; abnormal data in a strong earthquake record can be rejected; and the earthquake analysis result reliability can be enhanced.

Description

technical field [0001] The invention relates to the technical field of seismic data analysis, in particular to a method and device for identifying asymmetric waveforms in strong earthquake records. Background technique [0002] In the strong motion observation work, after obtaining the first-hand earthquake data, it is necessary to start processing immediately for earthquake emergency and scientific research work such as intensity rapid report and earthquake characteristics analysis. The most direct object in this process is the strong The acceleration records (i.e., the acceleration time-history curve) obtained by the shaking station usually have good symmetry, that is, the overall history curve has good symmetry about the time axis, and the acceleration time-history amplitude does not appear to be significantly shifted to one side phenomenon, and the time-course graphical features are clear and easy to analyze, such as figure 2 shown. However, in the actual strong earthq...

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): G01V1/30G01V1/36
CPCG01V1/30G01V1/366G01V2210/324G01V2210/42
Inventor 周宝峰徐长琦任叶飞温瑞智谢礼立
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com