Non-contact online measurement method and apparatus of boiler main steam pipeline macroscopic displacement

A main steam and pipeline technology, applied in the field of non-contact measurement devices, can solve the problems of not considering the interaction of multiple failure mechanisms, large monitoring and evaluation errors, and lack of online measurement systems for key parameters, achieving high stability, Easy to apply, high-precision effects

Active Publication Date: 2015-11-04
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

In recent years, online life assessment systems for single components have begun to appear, but because most of these systems do not take into account the interaction of multiple failure mechanisms, there is a problem of large monitoring and evaluation errors
European and Japanese technical experts have established systematic life assessment guidelines for boiler piping systems, which consider the interactive effects of failure modes and have developed cor

Method used

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  • Non-contact online measurement method and apparatus of boiler main steam pipeline macroscopic displacement
  • Non-contact online measurement method and apparatus of boiler main steam pipeline macroscopic displacement
  • Non-contact online measurement method and apparatus of boiler main steam pipeline macroscopic displacement

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Embodiment Construction

[0049] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0050] See figure 1 with figure 2 As shown, the implementation example of the measuring device for the macroscopic displacement of the boiler main steam pipe 3 of the present invention dedicated to the above method includes: setting up the lower section of the elastic support hanger 1 which is simplified as the upper and lower sections of rigid rods and the middle section of spring Two marking points 2, the marking point is a cylinder or a cuboid module with a colored coating on the surface; a binocular high-definition camera 4 corresponding to the number of marking points is fixed non-contact near the elastic support hanger, which is an industrial-grade high-definition camera. Resolution day and night cameras; the shooting direction of the high-definition camera is facing each mark...

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Abstract

A non-contact online measurement method of boiler main steam pipeline macroscopic displacement comprises the following steps: 1, establishing a spatial coordinate system of a pipeline center line and elastic support hangers; 2, simplifying the elastic support hangers into an upper rigid rod, a lower rigid and a middle spring, and respectively setting two marking points on the lower rigid rod; 3, arranging a high-definition camera, and connecting a main control computer through a wireless bridge; 4, acquiring the spatial coordinates of the marking points in the coordinate system through adopting a three dimensional reconstruction algorithm; 5, acquiring the coordinates of the marking points after creep deformation; 6, establishing the linear equation of the lower segment of the elastic support hangers; and 7, combining the linear equation with the curve equation of the external surface of the boiler main steam pipeline to obtain the coordinate of an intersection point B' of the linear l1 equation and the external surface of the boiler main steam pipeline, and accurately calculating the macroscopic displacement of the pipeline in every direction after taking regard of errors. High-stability and high-precision pipeline macroscopic displacement is obtained in an online non-contact manner.

Description

technical field [0001] The invention relates to a non-contact measurement method for the macroscopic displacement of boiler main steam pipes, in particular, through the binocular vision technology to recognize the acquired digital image, perform three-dimensional reconstruction, and obtain a three-dimensional scene, so as to use the geometric relationship to measure the boiler main steam. A non-contact online measurement method for the macroscopic displacement of the pipeline. The invention also relates to a non-contact measuring device for the macroscopic displacement of the boiler main steam pipe specially used in the method. Background technique [0002] With the expansion of the capacity and scale of the power system, the failure of power equipment has a greater impact on people's production and modern life, and users have higher and higher requirements for the safe operation and reliable power supply of the power system. This makes the safety and reliability of the pow...

Claims

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Application Information

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IPC IPC(8): G01C11/08
CPCG01C11/08
Inventor 王伟钟万里樊绍胜何凤生钟力强李文胜林介东聂铭
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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