Paper Title:
Study on the Inspection Method of Gas Valve’s External Taper Screw Thread Based on Image Domain
  Abstract

The failure of the gas valve’s external screw taper thread is a very serious problem which may result in accidents. Routine inspection on the threads is thus necessary. The efficiency of traditional manual testing methods can not meet the production requirements. An automatic visual inspection system for gas valve’s external screw taper thread is presented in the paper. The system consists of a high-performance 200 mega pixels CCD camera, a LED backlight and a holder of gas valve. Through image acquisition, image processing, edge detection and feature dimension measurement, the system can effectively measure the parameters of taper thread such as half of thread angle, depth of thread, taper angle of thread on image domain. Due to the lead angle and installation error, actual half of thread angle is different from the theoretical values. Three methods are presented in the paper for the half of thread angle. Through analysis, Method 3 and Method 2 can be used to measure half of thread angle. The system can meet the testing requirements of the external screw taper thread and has wide application perspective.

  Info
Periodical
Advanced Materials Research (Volumes 189-193)
Edited by
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Pages
4195-4200
DOI
10.4028/www.scientific.net/AMR.189-193.4195
Citation
X. C. Zhang, X. Zhang, J. Chen, "Study on the Inspection Method of Gas Valve’s External Taper Screw Thread Based on Image Domain", Advanced Materials Research, Vols. 189-193, pp. 4195-4200, 2011
Online since
February 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: An Hong Bao, Ming Jin Yang, Xing Dai, Zhen Yu Qiu, Shou Yong Xie
Abstract:According to Vortex Theory, the fluid flow in a swirl-core nozzle was analyzed, and an equation of spray angle was presented. The fluid in...
1082
Authors: Zhi Liang Qian, Yan Chen
Abstract:In view of the adjustment of tool post angle during hobbing modified spur gear, the basic worm helicoids of hob is generated according to...
555
Authors: Shiuh Chuan Her, Sheng Tung Lin
Abstract:Ultrasonic is one of the most common uses of non-destructive evaluation technique. It could detect flaws inside the structure and on the...
865
Authors: Yi Bo Feng, Xi Sheng Li, Xiao Juan Zhang
Chapter 2: Manufacturing and Design Science
Abstract:In the view of the disadvantages brought by DMC(digital magnetic compass) and gyro when they are used separately, a combined directional...
2510
Authors: Ping Yu, Bao Guo Dong, Yu Juan Xue
Chapter 4: Pharmaceutical, Chemical and Energy Engineering
Abstract:In video monitoring system of substation, in-process video inspection is used to detect abnormalities and provide corresponding solutions in...
759