scholarly journals Development of automatic inspection device for pipe inner surface

2021 ◽  
Vol 2085 (1) ◽  
pp. 012016
Author(s):  
Shuo Pan ◽  
Xinjie Shao
Keyword(s):  
Three Dimensional ◽  
3D Measurement ◽  
Automatic Inspection ◽  
Motion Mechanism ◽  
Dimensional Measurement ◽  
Inner Surface ◽  
Three Dimensional Measurement ◽  
Image Acquisition System ◽  
Dimensional Shape ◽  
Three Dimensional Shape

Abstract Aiming at the problem of 3D measurement of the inner surface of pipe, this paper develops a new structure of pipe inspection device inside the pipe based on the principle of laser triangulation. The device is composed of motion mechanism and image acquisition system. The three-dimensional shape of the inner surface is reconstructed the image pixel offset. The detection device driven by the motion mechanism can realize the automatic detection of different positions. The experiment shows the steps of the three-dimensional measurement of the inner surface of the pipe, verifies the feasibility of this method.

scholarly journals Three-Dimensional Measurement of TRISO Coated Particle Using Micro Computed Tomography

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Libing Zhu ◽  
Xincheng Xiang ◽  
Yahui Peng ◽  
Xiangang Wang
Keyword(s):  
Computed Tomography ◽  
Thickness Distribution ◽  
Three Dimensional ◽  
Pyrolytic Carbon ◽  
3D Measurement ◽  
Dimensional Measurement ◽  
Coated Particle ◽  
Three Dimensional Measurement ◽  
Design Value ◽  
Coating Layers

The fuel safety and performance of high-temperature gas-cooled reactor (HTGR) are dependent on the integrity and geometric parameter of Tri-structural Isotropic (TRISO) coated particle. Micro X-ray computed tomography (CT) was used for nondestructive testing and three-dimensional measurement of the particle components which are composed of kernel, buffer layer, inner pyrolytic carbon layer (IPyC), silicon carbide (SiC) layer, and outer pyrolytic carbon (OPyC) layer. The thickness distribution and volume of kernel and coating layers are obtained by constructing 3D volume rendering of TRISO particle. Mean thickness of each layer is calculated for comparison with design value. A comparison between two-dimensional and three-dimensional measurement results is also made. It is found that the thickness distribution of all layers approximately obeys Gaussian distribution. Deviation of the thickness of kernel and coating layers between 3D measurement result and design value is 7.88%, -25.63%, -45.50%, 13.87%, and 14.73%, respectively. The deviation will affect the failure probability of TRISO particle. Obvious difference of the OPyC mean thickness between 3D measurement and 2D measurement is found, which proves that the proposed 3D measurement provides comprehensive information of the particle. However, 2D and 3D measured thickness of the kernel and IPyC layer tend to be similar.

The Realization of the Key Technology in Image Capture Based on the Three-Dimensional Grating Surface Measuring Apparatus

2010 ◽  
Vol 33 ◽  
pp. 428-432
Author(s):  
Xue Dong Xie ◽  
Jun Ting Cheng ◽  
Wei Ling Zhao ◽  
Sheng Bing Xiao
Keyword(s):  
Image Acquisition ◽  
Three Dimensional ◽  
Measuring Apparatus ◽  
Image Capture ◽  
Industrial Inspection ◽  
Hardware Configuration ◽  
Image Acquisition System ◽  
Dimensional Shape ◽  
Development Methods ◽  
Three Dimensional Shape

With the development of the computer vision and information on optics, three-dimensional grating surface measuring apparatus has been increasingly widely used, which is mainly used in industrial inspection, quality control, reverse engineering, virtual reality, cultural reproduction and other areas. It has high precision, fast, non-contact advantages. And the image acquisition system is one of the core and first part of three-dimensional grating surface measuring apparatus, which determines measuring accuracy in the three-dimensional shape. This paper mainly introduces image acquisition system's hardware configuration and software development methods in the apparatus, and finally gives the experimental results.

Handheld Three-Dimensional Thermo-Sensing System

2013 ◽  
Vol 303-306 ◽  
pp. 103-108
Author(s):  
Tao Li ◽  
Kikuhito Kawasue
Keyword(s):  
Measurement System ◽  
Three Dimensional ◽  
Magnetic Sensor ◽  
Measurement Technology ◽  
Dimensional Measurement ◽  
Level Of Satisfaction ◽  
Image Capturing ◽  
Three Dimensional Measurement ◽  
Dimensional Shape ◽  
High Level

Recently, three-dimensional (3D) measurement technology has achieved a high level of satisfaction in various fields such as medical and engineering fields. However, most of three-dimensional measurement systems have some disadvantages. Once the geometric configuration of the system has been determined, the configuration must be maintained until the measurements have been completed. Another disadvantage is the existence of immeasurable area that inherently exists in a single image taken from a fixed angle. In this paper, a handheld three-dimensional thermo-sensing measurement system is presented. This system is composed of a three-dimensional measurement device and a thermographic device. To realize the handy scanning measurement, 3D magnetic sensor is attached on the image capturing devices. Since the movement of the image capturing devices is detected in real-time by the magnetic sensor, the immeasurable area can be reduced by free movement of the image capturing devices. On the basis of the presented mathematical model, this system is possible to detect not only the three-dimensional shape but also the temperature distribution of an object. Experimental results show the feasibility of the measurement system.

Three-dimensional measurement of an inner surface profile using a supercontinuum beam

2018 ◽  
Vol 57 (19) ◽  
pp. 5371 ◽  
Author(s):  
Toshitaka Wakayama ◽  
Yuta Takahashi ◽  
Yuichi Ono ◽  
Yusuke Fujii ◽  
Takuya Gisuji ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Surface Profile ◽  
Dimensional Measurement ◽  
Inner Surface ◽  
Three Dimensional Measurement

Four Dimensions of Diamond T: Combination Trade Marks of Colours And Shapes

2006 ◽  
Vol 37 (4) ◽  
pp. 583
Author(s):  
Michael McGowan
Keyword(s):  
Three Dimensional ◽  
Trade Mark ◽  
Fourth Dimension ◽  
Trade Marks ◽  
Four Dimensions ◽  
Trade Mark Law ◽  
Dimensional Shape ◽  
Three Dimensional Shape

This article examines the relatively new fields of colour and shape trade marks. It was initially feared by some academics that the new marks would encroach on the realms of patent and copyright.  However, the traditional requirements of trade mark law, such as functionality and descriptiveness, have meant that trade marks in colour and shape are extremely hard to acquire if they do not have factual distinctiveness. As colour and shape trade marks have no special restrictions, it is proposed that the combination trade mark theory and analysis from the Diamond T case should be used as a way to make them more accessible. The combination analysis can be easily applied because every product has a three dimensional shape and a fourth dimension of colour.

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