Method for measuring nonuniform temperature field in wall and wall thickness

A measurement method and temperature field technology, applied in the direction of measuring devices, instruments, etc., can solve the problems that the ultrasonic solid temperature measurement method is difficult to meet the actual needs of the project, and achieve the effects of broadening the scope of application, eliminating influence, and avoiding manufacturing and processing accuracy

Active Publication Date: 2016-04-06
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

Only using ultrasonic longitudinal wave or ultrasonic transverse wave method alone, the ultras

Method used

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  • Method for measuring nonuniform temperature field in wall and wall thickness
  • Method for measuring nonuniform temperature field in wall and wall thickness
  • Method for measuring nonuniform temperature field in wall and wall thickness

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0022] Such as figure 1 A measurement method for simultaneously obtaining the non-uniform temperature field and wall thickness inside the wall is shown, and the basic steps are:

[0023] (1) Obtain the relationship between the longitudinal wave / shear wave velocity and temperature in the tested specimen (Q235 steel) from the calibration test, such as figure 2 shown;

[0024] (2) For the steel specimen (length × width × height is 200 × 50 × 30mm, the thickness of the heating surface measured by the vernier caliper is 30.21mm), using the infrared method to obtain a large area of ​​the specimen surface at the time of 10s, 20s, 50s and 100s The temperature is 26 , 26.3 , 38.7 and 62.3 ;

[0025] (3) Based on ...

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Abstract

The invention discloses a method for measuring a nonuniform temperature field in a wall and the wall thickness, and the method comprises the steps: phase differences separately measured by using an ultrasonic longitudinal wave method and an ultrasonic transversal wave method are obtained, the phase differences are used as the input quantity, the equivalent thermal boundary condition and wall thickness are obtained based on a multiparameter inversion method of the inverse heat conduction problem, and the temperature field distribution states of the furnace wall or tube wall in different times are obtained according to the direct heat conduction problem. The method can be used for measuring the nonuniform temperature field in structures such as a blast furnace wall, a high-temperature steam pipeline wall and the like under a wall thickness unknown condition.

Description

technical field [0001] The invention relates to the technical field of ultrasonic testing, in particular to a measurement method for simultaneously acquiring a non-uniform temperature field inside a wall and wall thickness. Background technique [0002] Ultrasonic solid temperature measurement is a temperature measurement technology based on the correlation between ultrasonic propagation velocity and medium temperature to achieve non-destructive and high-precision detection of the internal temperature of the medium. Compared with the traditional perforated embedded temperature sensor temperature measurement method, the ultrasonic temperature measurement method has the advantages of non-destructive, non-contact, fast response, etc.; compared with non-destructive infrared, phosphorescence and other methods, the ultrasonic temperature measurement method can be effective Advantages of measuring temperature parameters inside structures. [0003] The wall thickness of the blast f...

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Application Information

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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 魏东石友安杜雁霞桂业伟李伟斌刘深深曾磊朱言旦
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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