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High polymer material internal defect nondestructive detecting device

A technology for polymer materials and internal defects, which is applied in the field of non-destructive testing devices for internal defects of materials, and can solve problems such as inappropriate application of polymer materials.

Inactive Publication Date: 2016-08-31
CHINA NUCLEAR TIANJIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional visual methods, magnetic field methods, thermal imaging methods, eddy current methods, and ray methods are not suitable for application on polymer materials.

Method used

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  • High polymer material internal defect nondestructive detecting device
  • High polymer material internal defect nondestructive detecting device
  • High polymer material internal defect nondestructive detecting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Use the device of the present invention to detect the internal defects of the circular polymer material workpiece with a diameter of Ø100;

[0044] (i) Setting up the function signal generator

[0045] Set the function as a frequency sweep signal with a period of 2s;

[0046] (ii) Setting up the power amplifier

[0047] Set to output 3.5V;

[0048] (iii) Setting the acceleration sensor

[0049] Paste an acceleration sensor every 120° on the circumferential surface of the workpiece to be tested, and the response of the acceleration sensor is 40mV / g;

[0050] (ⅳ) Set the digital processing device

[0051] Set the charge output, the magnification is 100x, the zero drift coefficient is 0.154, and the wavelet function window is established;

[0052] (ⅴ) Create a matching template

[0053] Such as image 3 As shown, the standard sample model: according to the above settings to detect the workpiece to be tested, the defect waveform is shown as Figure 4 As shown, by co...

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PUM

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Abstract

The invention discloses a high polymer material internal defect nondestructive detecting device. The detecting device comprises a function signal generator, a power amplifier and an exciter which are sequentially connected through connecting wires. A to-be-detected workpiece is hung on a support through an elastic rope. The lower bottom face of the to-be-detected workpiece makes contact with the trigger end of the exciter. A plurality of acceleration sensors are evenly distributed on and attached to the surface of the to-be-detected workpiece circumferentially and connected with a charge amplifier through connecting wires. The charge amplifier is connected with a digital signal processing device through a connecting wire. On the premise of not damaging materials, by means of the device for detecting the internal structure of a high polymer material, through the forced vibration generated on the high polymer material through the exciter, the defect type and generation position can be accurately obtained through a vibration type analysis device.

Description

technical field [0001] The invention belongs to a non-destructive detection device for internal defects of materials, in particular to a non-destructive detection device for internal defects of polymer materials. Background technique [0002] Polymer materials are superior to other materials in terms of mechanical properties, processing plasticity, insulation, and corrosion resistance. In particular, polymer epoxy resin potting adhesives are widely used in power electronic equipment such as transformers, transformers, hysteresis motors, and induction motors. [0003] In actual use, in order to further obtain some mechanical properties of polymer materials, it is usually necessary to add composite additives, modify it or add dyes to change its color due to special needs. However, modified or dyed polymer materials are usually opaque, and it is difficult to find quality defects under the surface or even inside the material such as material release, cracks, internal keyholes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/08
CPCG01N19/08
Inventor 王鸣山王胜男
Owner CHINA NUCLEAR TIANJIN TECH DEV