Stress detection method

A stress detection and stress technology, which is applied in the direction of force measurement by measuring the change of magnetic properties of materials caused by applied stress, can solve the problem that the stress anisotropy detection of aviation liquid pressure pipeline cannot accurately grasp the internal stress distribution, etc. Achieve the effect of accurate stress distribution in the pipeline

Active Publication Date: 2022-02-11
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology

[0004] The main purpose of this application is to provide a stress detection method, which aims to solve the technical problem that the existing d

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Example Embodiment

[0051] Example

[0052] Refer Figure 1 - Figure 8 This embodiment provides a stress detecting method for stress detection system, the stress detecting system comprising a computer, a single-chip, a signal generator, a pre-gain amplifier, a power amplifier, and a yoke detector, a power amplifier, a signal generator The single-chip microcomputer is also electrically connected to the front gain amplifier, the power amplifier electrical and the yoke detector, which can generate an excitation signal:

[0053] The detection method includes the following steps:

[0054] Enter the regulatory function in the single chip microcomputer;

[0055] In the computer, input a preset magnetization angle change amount and the magnetic flux measuring the yoke detector to regulate the pre-gain amplification of the excitation signal;

[0056] Place the yoke detector on the surface of the aviation liquid pressure conduit and press the measurement to obtain a detection signal;

[0057] The root mean squa...

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Abstract

The invention discloses a stress detection method which is used for a stress detection system. The stress detection system comprises a computer, a single-chip microcomputer, a signal generator, a pre-gain amplifier, a power amplifier and a magnet yoke detector which are electrically connected in sequence, wherein the magnet yoke detector can generate an excitation signal. The detection method comprises the following steps: inputting a regulation and control function in the single-chip microcomputer; inputting a preset magnetization direction angle variable quantity and magnetic flux measured by the magnet yoke detector into the computer so as to regulate and control the pre-gain amplification factor of the excitation signal; placing the magnet yoke detector on the surface of the aviation liquid pressure pipeline and carrying out pressing measurement to obtain a detection signal; inputting the root mean square of the detection signal into a preset function in the computer to obtain a relative anisotropy and stress distribution function. The method has the advantages that the method can be suitable for stress detection of the aviation liquid pressure pipeline, and the internal stress distribution condition can be accurately mastered.

Description

technical field [0001] The present application relates to the technical field of pressure pipeline stress detection, in particular to a stress detection method. Background technique [0002] The distribution of internal stress on the surface of aviation liquid pressure pipes is related to its working state and structure, and it often shows anisotropic distribution. At the same time, the influence of internal stress on the performance of aviation liquid pressure pipes is similar to that on the magnetic properties. The stress anisotropy of the liquid pressure pipeline is evaluated as a reference quantity for its overall stress distribution. [0003] Due to the limitations of the applicable field, the existing detection methods cannot accurately detect the difference in the distribution of stress in the circumferential direction (that is, the relative anisotropy) when testing the stress anisotropy of aviation liquid pressure pipelines, and cannot accurately calculate The speci...

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Application Information

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IPC IPC(8): G01L1/12
CPCG01L1/12
Inventor 程志远李美琦李航欧雷龙萍徐超
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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