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

Relative excitation method for ultrasonic tomography system

A technology of ultrasonic tomography and imaging signals, which is applied in the direction of analyzing fluids, analyzing materials, and instruments using sound waves/ultrasonic waves/infrasonic waves, and can solve the problem of two-phase flow flow pattern imaging deterioration, large acoustic impedance difference, and small detection signals and other problems, to achieve the effect of increasing the intensity and amplitude, increasing the coverage, and improving the detection efficiency

Inactive Publication Date: 2019-04-19
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the ultrasonic tomography system is used to detect the gas-liquid two-phase flow in the metal pipe, because the acoustic impedance of the metal pipe and the liquid in the pipe is greatly different, only a small part of the sound wave can enter the liquid in the pipe, and the detection signal becomes smaller, which brings difficulties to detection, and finally leads to the deterioration of two-phase flow pattern imaging

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
  • Relative excitation method for ultrasonic tomography system
  • Relative excitation method for ultrasonic tomography system
  • Relative excitation method for ultrasonic tomography system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0014] In order to realize tomographic imaging, the number of ultrasonic sensors should not be less than 16. Taking 32 as an example, the general-purpose piezoelectric ultrasonic sensors (PZT-5A) are evenly distributed in metal pipes with a circular cross section. The sensor number at the 9 o’clock position is named sensor T1, and the sensors are numbered sequentially according to the clockwise rotation. . When detecting the flow pattern of two-phase flow, the two opposite sensors T1 and T17 are first excited at the same time, and the two simultaneously excited signals A and B are synthesized in the liquid, so that the strength of the synthesized signal C will increase, and at the same time the sound wave The coverage will increase, control all other sensors as receiving s...

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 provides a relative excitation method for an ultrasonic tomography system. Even-numbered piezoelectric ultrasonic sensors are uniformly distributed on the side wall of a metal pipeline in the circumferential direction, two piezoelectric ultrasonic sensors symmetrical about the axis of the metal pipeline are excited to send signals, and all other piezoelectric ultrasonic sensors are controlled to serve as receiving sensors, two signals excited simultaneously are synthesized in liquid, and the synthesized signals are received by the receiving sensors to serve as a group of component image signals; two other piezoelectric ultrasonic sensors symmetrical about the axis of the metal pipeline are simultaneously excited in sequence, and all other piezoelectric ultrasonic sensors arecontrolled to serve as receiving sensors to obtain imaging signals; image reconstruction is conduced through all the imaging signals. Accordingly, the intensity and amplitude of the ultrasonic excitation signals and the receiving signals in the ultrasonic tomography system are improved, the coverage range of ultrasound in the pipeline is enlarged, the two-phase flow detection quality and image reconstruction quality are improved, and the detection efficiency of the ultrasonic tomography system is improved.

Description

technical field [0001] The invention relates to an excitation mode of an imaging system, which is used for improving the detection quality of two-phase flow patterns in petroleum pipelines. Background technique [0002] Oil and gas mixed two-phase flow usually exists in oil pipelines. The detection of the flow state of the two-phase flow not only ensures the safety of transportation, but also helps to improve the efficiency of oil and gas mixed transportation. Ultrasound tomography is a new sensing technology for the detection of the flow state of two-phase flow. Different from other tomographic imaging technologies, this technology can be used to detect two-phase flow in metal pipelines, and has the advantages of no radiation, low cost, and good stability. However, when the ultrasonic tomography system is used to detect the gas-liquid two-phase flow in the metal pipe, because the acoustic impedance of the metal pipe and the liquid in the pipe is greatly different, only a s...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/02
CPCG01N29/02G01N2291/02433
Inventor 韩颖
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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