Device and method for measuring dynamic displacement of bridge based on mobile terminal

A technology of mobile terminals and measuring devices, applied in measuring devices, instruments, etc., can solve the problems of heavy wiring workload, high test cost, and large volume, and achieve the effects of low cost, easy acquisition, and simple detection process

Inactive Publication Date: 2014-11-05
SOUTH CHINA UNIV OF TECH
View PDF7 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a method based on the above-mentioned bridge dynamic displacement measurement device. The method uses the existing mobile terminal to realize the me

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
  • Device and method for measuring dynamic displacement of bridge based on mobile terminal
  • Device and method for measuring dynamic displacement of bridge based on mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The current mobile terminals are integrated with processors, display screens, acceleration sensors and other hardware, and with the rapid development of electronic manufacturing technology, these hardware performance is becoming more and more powerful, the accuracy is getting higher and higher, and even meet the requirements of engineering applications . Based on the above mobile terminal, this embodiment proposes the following figure 1 A bridge dynamic displacement measurement device based on a mobile terminal is shown, including a parameter setting module, an acceleration measurement module, a vibration data processing module, and a display module. The above modules are all software programs developed based on an intelligent mobile terminal platform and processed by a CPU , and the processing result is displayed on the display screen of the mobile terminal.

[0028] The parameter setting module is used to set the sampling length and the acceleration direction (X, Y, ...

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 device and a method for measuring the dynamic displacement of a bridge based on a mobile terminal. The mobile terminal is integrated with an acceleration sensor. The device comprises a parameter setting module, an acceleration measuring module, a vibration data processing module and a display module. The invention further discloses the measuring method comprising the following steps: the sampling length and the direction of measured acceleration are set; the mobile terminal is fixed to a bridge dynamic displacement monitoring point; an API provided by a mobile terminal operating system is called to access underlying hardware and read a bridge vibration signal acquired by the acceleration sensor; an acceleration time-history signal is obtained according to the bridge vibration signal, FFT transform is performed on the acceleration time-history signal, quadratic integral is carried out in a frequency domain to obtain a frequency domain signal of displacement, low-frequency noise is filtered by use of a low-frequency cutoff algorithm, and IFFT transform is performed on the processed frequency domain signal of displacement to obtain a time-history signal of displacement. The device and the method of the invention have the advantages of simple detection process, low cost, small size, convenient carrying, and no need for adding any hardware.

Description

technical field [0001] The invention relates to the field of vibration measurement research, in particular to a device and method for measuring bridge dynamic displacement based on a mobile terminal. Background technique [0002] Vibration is a common phenomenon in the process of bridge operation, especially when vehicles pass by, the bridge will vibrate violently. Theoretically, if the bridge structure does not change, the vibration parameters of the bridge are fixed. Conversely, if the vibration parameters of the bridge change, it indicates that the bridge structure has also changed. Therefore, the vibration parameters of the bridge are the bridge work An important indicator of status. The dynamic displacement is produced by the bridge under the action of moving load, which reflects the stiffness characteristics of the bridge. Accurately measuring the dynamic displacement of the bridge can provide a scientific reference for the maintenance and reinforcement of the bridge....

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): G01B21/02
Inventor 颜全胜陈双锐
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap