Reference block used for small-angle longitudinal-wave detection and method of small-angle longitudinal-wave detection
A technology of comparing test blocks and small angles, which is applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices, which can solve problems such as inability to determine reflected waves and clutter interference
Active Publication Date: 2015-03-04
CHINA SHENHUA ENERGY CO LTD +2
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[0005] However, when using the above-mentioned test block to adjust the sensitivity of the small-angle longitudinal wave flaw detection probe, determine the refraction angle of the small-angle longitudinal wave flaw detection probe and adjust the scanning speed of the small-angle longitudinal wave flaw detection probe, it is often interfered by clutter, such as figure 2 As shown, sometimes it is not even possible to determine which one is the reflected wave of the target via
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[0035] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0036] In the present invention, unless stated otherwise, the used orientation words such as "up, down, left, right" are usually image 3 The directions in are described as references.
[0037] Such as image 3 and Figure 4 As shown, as one aspect of the present invention, a comparison test block for small-angle longitudinal wave flaw detection is provided, the comparison test block includes a main body part 10 and an incident point determination part 20 formed on the right side of the main body part 10, wherein, A plurality of through holes 11 are formed on the main body 10, and the plurality of through holes 11 are sequentially arranged on a straight line ...
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Abstract
The invention discloses a reference block used for a small-angle longitudinal-wave detection. The reference block comprises a main part (10) and an incident point determining part (20) formed at the right side of the main part (10), wherein the main part (10) is provided with a plurality of through holes (11) which are successively arranged on a straight line extended from the upper-left part of the main part (10) to the lower-right part of the main part (10), and a vertical distance between the two adjacent through holes (11) is 15 to 30 mm. The invention further provides a method of the small-angle longitudinal-wave detection. By setting the vertical distance of the through holes on the main part of the reference block to be 15 to 30 mm, clutter interference can be reduced when the sensitivity of small-angle longitudinal-wave probe and a reflection equivalent are determined, thereby enabling the results of the small-angle longitudinal-wave detection to be relatively accurate.
Description
technical field [0001] The invention relates to the field of non-destructive flaw detection, in particular to a comparative test block for small-angle longitudinal wave flaw detection and a small-angle longitudinal wave flaw detection method. Background technique [0002] High-temperature fastening bolts are important parts of thermal power equipment in thermal power plants. In long-term operation, due to the effect of high temperature and high stress, the bolt material is prone to thermal embrittlement, creep, fatigue, stress corrosion and other problems; Cracks occur. In order to ensure the safe operation of equipment, it is very important to strengthen the effective inspection of high-temperature fastening bolts. [0003] At present, the method of small-angle longitudinal wave flaw detection is commonly used to test whether there are cracks inside high-temperature fastening bolts. Small-angle longitudinal-wave flaw detection requires a small-angle longitudinal-wave fla...
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IPC IPC(8): G01N29/30G01N29/04
Inventor 王维东张允超
Owner CHINA SHENHUA ENERGY CO LTD