Terahertz Nondestructive Testing Method of Oil-paper Insulation Debonding and Foreign Matter Defects

2021 ◽  
Vol 28 (6) ◽  
pp. 1901-1908
Author(s):  
Jiajun Li ◽  
Lijun Yang ◽  
Yuxin He ◽  
Wei Li ◽  
Chao Wu
Keyword(s):  
Nondestructive Testing ◽  
Foreign Matter ◽  
Testing Method ◽  
Nondestructive Testing Method ◽  
Paper Insulation

Using Indentation Test to Evaluate the Properties of Metallic Material with Strain Aging

2015 ◽  
Vol 751 ◽  
pp. 131-136
Author(s):  
Jie Tang ◽  
Mao Cheng ◽  
Guo Gen Huang ◽  
Hong Shu ◽  
Hui Ting Xu
Keyword(s):  
Nondestructive Testing ◽  
Experimental Verification ◽  
Material Properties ◽  
Strain Aging ◽  
Experimental Testing ◽  
Indentation Test ◽  
Metallic Materials ◽  
Metallic Material ◽  
Testing Method ◽  
Nondestructive Testing Method

In this paper, research on a testing method of indentation test proposed by F M Haggag is discussed first, and the experimental testing research on metallic material properties with strain aging is carried out and discussed using indentation test. The authors proposed to use indentation test to measure the properties of metallic materials with strain aging embrittlement based on experimental verification. And it provides a possibility to measure the properties of metallic materials with strain aging using nondestructive testing method.

Study on Fruits Preservation in View of Surface Glossiness

2011 ◽  
Vol 338 ◽  
pp. 521-524
Author(s):  
Geng Jia Wang ◽  
Xin Guang Lv ◽  
Shu Ting Kuang ◽  
Hui Long Chen ◽  
Jing Peng
Keyword(s):  
Mathematical Model ◽  
Regression Analysis ◽  
Nondestructive Testing ◽  
Moisture Content ◽  
Linear Relation ◽  
Low Cost ◽  
Testing Method ◽  
Moisture Meter ◽  
R Value ◽  
Nondestructive Testing Method

Abstract: Nowadays, there is no low-cost fruit nondestructive testing method in China. The study aims to put forward a method about acquiring the moisture content of fruits indirectly by general photographic equipments. Firstly, general photographic equipment is used to obtain pictures of fruits or vegetables. Secondly, with the help of Matlab and Photoshop, the surface glossiness of the fruit or vegetable is gained. Thirdly, moisture content of a fruit or vegetable is measured through infrared moisture meter. Meanwhile, a Mathematical Model in Regression Analysis between the R value and the moisture content is established. Lastly, the non-linear relation between surface glossiness and moisture content of the fruit is found. Therefore, a new method about measuring the moisture content of fruits or vegetables through general photographic equipments is sought out.

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