Terahertz dielectric spectrum-based rubber material aging state discrimination system and method

A technology of aging state and rubber materials, which is applied in the direction of material analysis, dielectric property measurement, and material analysis through optical means. It can solve problems such as narrow microwave low-frequency bandwidth, difficult material structure change analysis, and large value fluctuation range. Achieve the effect of low sample material requirements, low production requirements, and wide variety

Active Publication Date: 2020-11-03
SHANDONG ACAD OF SCI INST OF AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The inventors of the present disclosure found that in the microwave segment with a lower frequency band, generally based on the dielectric spectrum technology, the change of the dielectric constant and loss tangent in a certain frequency range is used to judge the state of the insulating material after aging, and at the same time, it is fitted by the Debye equation Analyzing the evolution process of the polar structure in the material, as a non-destructive testing spectral analysis technology, the dielectric spectrum technology has great potential and value in the application of on-site detection; Large and other defects, it is difficult to achieve fine analysis of material structure changes

Method used

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  • Terahertz dielectric spectrum-based rubber material aging state discrimination system and method
  • Terahertz dielectric spectrum-based rubber material aging state discrimination system and method
  • Terahertz dielectric spectrum-based rubber material aging state discrimination system and method

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Embodiment 1

[0033] Such as figure 1 As shown, Embodiment 1 of the present disclosure provides a rubber material aging state discrimination system based on terahertz dielectric spectroscopy, which includes a terahertz time-domain spectrometer, and the transmitting lens antenna and receiving lens antenna of the terahertz time-domain spectrometer are both arranged in an airtight in the box;

[0034] The terahertz time-domain spectrometer 1 includes a terahertz time-domain spectrum generating device, a transmitting end and a receiving end;

[0035] Among them, the terahertz emitted by the spectrometer is divided into two paths, one path passes through the delayer and then is used as the detection light input to the receiving end as a comparison signal, and the other pumping light is directly transmitted to the transmitting end and acts on the sample, and the signal passes through the sample and is received by the receiving end receiving, and comparing and calculating with the probe light, th...

Embodiment 2

[0045] Embodiment 2 of the present disclosure provides a method for judging the aging state of rubber materials based on terahertz dielectric spectroscopy, including the following steps:

[0046] When measuring, fill the airtight box with nitrogen or dry air;

[0047] When measuring, use the signal when there is no sample, that is, the signal when the terahertz signal path is only air, as a reference signal, and test the complex refractive index of the air at the same thickness as the sample to be tested at this time, to achieve system calibration and reference value measurement;

[0048] Using a terahertz time-domain spectrometer to test the complex refractive index of the sample, including at least the real part of the refractive index and the extinction coefficient;

[0049] Calculate the dielectric spectrum data of the material through the relationship between the dielectric constant and the refractive index;

[0050] Based on the obtained dielectric spectrum data, the diel...

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Abstract

The invention provides a terahertz dielectric spectrum-based rubber material aging state discrimination system, belongs to the technical field of rubber material aging judgment, and comprises a terahertz time domain spectrometer, and a transmitting lens antenna and a receiving lens antenna of the terahertz time domain spectrometer are both arranged in a closed box body. A to-be-detected sample isarranged at the focal points of the transmitting lens antenna and the receiving lens antenna, and the surface of the to-be-detected sample is perpendicular to the terahertz transmission path; according to the invention, non-contact nondestructive measurement of a test sample is ensured, the requirement on a sample material is low, the operation is convenient, the measurement frequency is wide, theaccuracy is high, the fluctuation range of a measured value is small, and the method has outstanding advantages in aging detection of insulating materials such as plastic and rubber.

Description

technical field [0001] The present disclosure relates to the technical field of aging judgment of rubber materials, in particular to a system and method for judging the aging state of rubber materials based on terahertz dielectric spectrum. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Rubber products have excellent material properties and can be seen everywhere in social life. Aging is a physical and chemical change that occurs gradually due to the comprehensive influence of internal and external factors during its use or storage. For example, from the appearance, the surface is sticky or hardened and deformed. , discoloration, etc. Aging is a slow and complicated chemical reaction process, and eventually the application performance of rubber products is greatly reduced, and it becomes the main source of safety hazards. The essence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586G01R27/26G01N21/3563G01N21/41
CPCG01N21/3586G01R27/2682G01N21/3563G01N21/41G01R27/267Y02W30/62
Inventor 张献生常天英刘陵玉李羿璋崔洪亮
Owner SHANDONG ACAD OF SCI INST OF AUTOMATION
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