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Nondestructive testing accurate knocking device and method thereof

A non-destructive testing and accurate technology, applied in measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, generation of ultrasonic/sonic/infrasonic waves, etc., can solve the problem that affects the evaluation results of internal defects of the tested wood, and the non-destructive testing technology is difficult to truly reflect wood etc.

Pending Publication Date: 2021-11-19
SHANGHAI CONSTRUCTION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing non-destructive testing technology is difficult to truly reflect the internal structure of the wood, which affects the evaluation results of the internal defects of the tested wood

Method used

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  • Nondestructive testing accurate knocking device and method thereof
  • Nondestructive testing accurate knocking device and method thereof
  • Nondestructive testing accurate knocking device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] combine Figure 1 to Figure 4 Illustrate the non-destructive testing precision knocking device of the present invention, it comprises:

[0035] A cylindrical frame 10, one end of the cylindrical frame 10 close to the detected object (not shown in the figure) is an open end, and the other end is provided with a closed end plate 12;

[0036] Hammer 30, which is arranged in the inner cavity of the cylindrical frame 10 and can slide along its axis, the end of the hammer 30 can be in contact with the detected object located at the open end of the cylindrical frame 10;

[0037] A pull rod 20, one end of the pull rod 20 is hinged to the hammer head 30, the other end of which passes through the end plate 12 and extends out of the cylindrical frame 10, and the outer wall of the pull rod 20 is provided with scales or marks;

[0038] The spring 40 is disposed in the inner cavity of the cylindrical frame 10 and sheathed on the pull rod 20 , and the two ends of the spring 40 respec...

Embodiment 2

[0050] like Figure 5 and Image 6 As shown, the present invention also provides a non-destructive testing precision tapping method, the specific steps are as follows:

[0051] S1: Pull the pull rod 20 to drive the hammer head 30 to move along the cylindrical frame 10 in a direction away from the object to be detected, the spring 40 is compressed by force, and stops pulling when it reaches a certain scale or a specific position of the mark, and determines the striking force;

[0052] S2: Place the stress wave sensor on the top of the object to be detected and determine the knocking point, set the non-destructive testing precision knocking device on the top of the stress wave sensor, and hold the non-destructive testing precision knocking device so that the hammer head 30 is aligned with the knocking point;

[0053] S3: Loosen the pull rod 20, under the action of the spring 40 and gravity, the hammer head 30 moves down along the cylindrical frame 10 and hits the stress wave se...

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Abstract

The invention discloses a nondestructive testing accurate knocking device and a method thereof, and relates to the technical field of nondestructive testing. The problem that the evaluation result of internal defects of detected wood is affected due to the fact that the existing nondestructive testing technology is difficult to reflect the internal structure of the wood truly is solved. The nondestructive testing accurate knocking device comprises a cylindrical frame with one open end and the other closed end, a spring, a pull rod and a hammer head arranged in an inner cavity of the cylindrical frame, one end of the pull rod is hinged to the hammer head, the other end of the pull rod penetrates through an end plate of the cylindrical frame and extends out of a cylindrical, the pull rod is sleeved with the spring, and the two ends of the spring abut against the hammer head and the end plate respectively; the method comprises the steps that after the hammer head is aligned with a detected object, the pull rod is pulled to a certain scale or mark to determine the knocking force, the pull rod is loosened, and the hammer head is instantly accelerated under the action of the elastic force of the spring and automatically knocks the knocking point of the stress wave sensor on the detected object.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a non-destructive testing precision tapping device and method. Background technique [0002] At present, the non-destructive testing technology based on the principle of stress wave is more and more widely used in wooden structure testing. Wooden structure testing can be divided into material performance testing, material defect testing, dimensional deviation and deformation testing, joint quality and structural performance testing, etc. , Non-destructive testing technology has the advantages of safety, simple operation, easy to carry, and suitable for on-site operations. [0003] During detection, the operator holds a small hammer and taps the contact of the stress wave sensor suspended on the wood to be detected, thereby stimulating the propagation of the stress wave. The stress wave sensor picks up the signal, and according to the wave theory, the propagation s...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/34
CPCG01N29/045G01N29/34G01N2291/0238G01N2291/0289
Inventor 尹婷婷韩振华
Owner SHANGHAI CONSTRUCTION GROUP
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