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Stress distribution monitoring device and method

A stress distribution and monitoring device technology, which is applied in the field of detecting stress changes in machinery or mechanical structural components, can solve problems affecting the reliability of detection, electromagnetic interference in the detection signal environment, and the inability to detect non-ferromagnetic material structures, etc., to achieve good reliability , good anti-interference effect

Inactive Publication Date: 2015-03-25
CHINA UNIV OF MINING & TECH
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  • Abstract
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Problems solved by technology

The first detection object must be limited to ferromagnetic materials, and the structure of non-ferromagnetic materials cannot be detected; the second detection signal is extremely susceptible to environmental electromagnetic interference, which affects the reliability of detection

Method used

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  • Stress distribution monitoring device and method
  • Stress distribution monitoring device and method
  • Stress distribution monitoring device and method

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Embodiment Construction

[0022] Embodiment will be further described below in conjunction with accompanying drawing:

[0023] Such as figure 1 As shown, a stress distribution monitoring device includes a multi-channel analog switch 6, a plurality of pressure sensors connected to the multi-channel analog switch 6, an A / D converter 7 and a microprocessor 8, and the pressure sensor includes Piezoelectric fiber 1, output follower 2, charge amplifier 3, differentiator 4 and signal holding circuit 5, wherein piezoelectric fiber 1 is set on the device under test, one end of piezoelectric fiber 1 is grounded, and the other end is in phase with output follower 2 Connect, the output end of output follower 2 is connected with the input end of charge amplifier 3 and differentiator 4 respectively, the output end of charge amplifier 3 and differentiator 4 is respectively connected with the input end of two signal adopting holding circuits 5, two The output terminals of the two signals adopt the holding circuit 5 t...

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Abstract

The invention discloses a stress distribution monitoring device and method. The stress distribution monitoring device is mainly composed of piezoelectric fibers, a dynamic signal amplifier, a charge amplifier, a signal adoption holding circuit, a multi-way analogue switch, an A / D converter and a microprocessor. The monitoring method of the stress distribution monitoring device comprises the steps that the multiple piezoelectric fibers are crossed and distributed to form a net on a structural part to be detected to perceive piezoelectric information generated by stress deformation of the structural part, and the stress distribution of the structural part is determined through information processing of the crossed fibers. The monitoring method can analyze the stress distribution of machines and other structural parts in real time and is of great significance on preventing structures from being excessively stressed to be fractured.

Description

technical field [0001] The invention relates to a stress distribution monitoring device and method, especially suitable for detecting stress changes of machinery or mechanical structural parts. Background technique [0002] At present, strain sensors are usually used for stress monitoring of mechanical or other structural components. The monitored information often reflects the deformation of the entire mechanical component, and it is impossible to accurately understand the maximum strain and position of the structural component, as well as the stress distribution of the entire structural component. Force analysis is very important. Through the stress distribution of mechanical components, the inhomogeneity of the force can be found, which provides a basis for the structural transformation of the structural components; through the maximum stress analysis of the structural components, it can provide key information for the control of mining machinery and equipment, so as to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/16
Inventor 童紫原童敏明李猛
Owner CHINA UNIV OF MINING & TECH
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