Passive acoustic detecting and positioning method for double-basic matrix data fusion power station boiler four-tube leakage

A technology for data fusion and power plant boilers, which is applied in the direction of steam boilers, steam boiler accessories, steam boiler components, etc., and can solve the problems of small detection range, impossibility and low precision of acoustic matrix

Inactive Publication Date: 2010-10-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detection range of a single acoustic array is small and the accuracy is low, especially its distance error is very large, sometimes it is almost impossible to achieve

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
  • Passive acoustic detecting and positioning method for double-basic matrix data fusion power station boiler four-tube leakage
  • Passive acoustic detecting and positioning method for double-basic matrix data fusion power station boiler four-tube leakage
  • Passive acoustic detecting and positioning method for double-basic matrix data fusion power station boiler four-tube leakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0033] figure 1 It is a diagram of the distribution of the four-element positive square array microphone array in the boiler. exist figure 1 Among them, the SG-1025 / 17.5-M723 boiler is used, and the boiler furnace is divided into A, B, C, D, E, and F layers, with a total of 30 measuring points. According to the distribution map of the furnace measuring points, the coordinates of the center positions of any two adjacent four-element positive four-array microphone arrays are (x 1 ,y 1 ,0), (x 2 ,y 2 , 0), where y 1 =y 2 . figure 2 It is the structural diagram of the four-element square array microphone array, in which spherical coordinates are used, M 1 , M 2 , M 3 and M 4 Quaternary quadrilateral microphon...

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 passive acoustic detecting and positioning method for the double-base matrix data fusion power station boiler four-tube leakage in the technical field of boiler pressure-bearing tube leakage and monitoring, which is used for solving the problems of narrow detection range, low precision, large error and difficult realization of a single acoustic matrix. The method comprises the following steps: arranging multilayer measuring points in a boiler, forming double basic matrixes by two adjacent layers of microphones and forming a square matrix by four microphones in each layer of microphones; calculating azimuth angles and pitch angles of the leakage positions corresponding to microphone arrays of quaternary square matrixes according to data measured by the microphone arrays; obtaining two adjacent sets of leakage position solutions and variances by using the calculated azimuth angles and pitch angles of the leakage positions of two adjacent of quaternary square matrix microphone arrays; and carrying out the weighted least-squares method fusion processing on the two adjacent sets of leakage position solutions and variances to obtain a leakage positioning solution of the double matrixes. The invention realizes the accurate positioning of a boil leakage source by using the coherency between redundant information of data and the arrays.

Description

technical field [0001] The invention belongs to the technical field of boiler pressure tube leakage monitoring, and in particular relates to a passive acoustic measurement and location method for four-tube leakage of a power station boiler with double matrix data fusion. Background technique [0002] The four boiler tubes of the thermal power generation unit include: water wall, superheater, reheater and economizer heating surface pipeline. Boiler four-tube leakage has always been a major problem that plagues the safe production of thermal power units. Early prediction of boiler four-tube burst is carried out to detect the leak in time before it develops into a destructive burst, and determine the location of the leak. It is of great significance for properly arranging shutdown, shortening maintenance time and reducing economic loss. [0003] At present, at home and abroad (see patent "Acoustic Leak Detection System", US4960079, "On-line Monitor for Boiler Pressure Tube Lea...

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): F17D5/06F22B37/42
Inventor 安连锁王鹏姜根山沈国清
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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