Measuring system for the wall thickness of pipe based on ultrasonic multisensor

Abstract This paper presents a novel thickness profile measuring system that measures double-sided thin pipe wall surfaces in a non-contact, continuous, cosine error-free, and fast manner. The surface metrology tool path was developed to align the displacement sensors always normal to the double-sided surfaces to remove cosine error. A pair of capacitive-type sensors that were placed on the rotary and linear axes simultaneously scans the inner and outer surfaces of thin walls. Because the rotational error of the rotary axis can severely affect the accuracy in thickness profile measurement, such error was initially characterized by a reversal method. It was compensated for along the rotational direction while measuring the measurement target. Two measurement targets (circular and elliptical metal pipe-type thin walls) were prepared to validate the developed measurement method and system. Not only inner and outer surface profiles but also thin-wall thickness profiles were measured simultaneously. Based on the output data, the circularity and wall thickness variation were calculated. The thickness profile results showed a good agreement with those obtained by a contact-type micrometer (1-µm resolution) at every 6-deg interval. The uncertainty budget for this measuring system with metrology tool path planning was estimated at approximately 1.4 µm.

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Application of an in situ measuring system for the compensation of wall thickness variations during turning of thin-walled rings

CIRP Annals ◽

10.1016/j.cirp.2013.03.129 ◽

2013 ◽

Vol 62 (1) ◽

pp. 511-514 ◽

Cited By ~ 8

Author(s):

Dirk Stöbener ◽

Björn Beekhuis

Keyword(s):

Wall Thickness ◽

Measuring System ◽

Thin Walled ◽

Thickness Variations

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A Precision Grinding Technology for Zirconium Alloy Tubes Based on Ultrasonic Wall Thickness Automatic Measurement System

10.21203/rs.3.rs-1155325/v1 ◽

2021 ◽

Author(s):

Lai Zou ◽

Heng Li ◽

Wenxi WANG ◽

Yun Huang ◽

Yutong Li

Keyword(s):

Wall Thickness ◽

Measurement System ◽

Zirconium Alloy ◽

Thickness Distribution ◽

Performance Testing ◽

Numerical Control ◽

Measuring System ◽

Combination Method ◽

New Combination ◽

Thickness Uniformity

Abstract To ensure the safety and long-term performance of nuclear fuel cladding zirconium tubes, the wall thickness uniformity of each cross section is strictly needed. Therefore, this paper presents comprehensive investigations on development of an automatic ultrasonic wall thickness measurement system for detecting the nuclear zirconium tubes. Based on the determination of overall scheme, optimization of key mechanical structures and design of control system, a series of performance testing analyses of this developed auto-measuring system were performed from aspects of measuring accuracy, measuring efficiency, stability and practicability. The results revealed that it could accurately obtain the wall thickness distribution and effectively guide the subsequent grinding process by automatically generated deviation correcting procedures to achieve the requirement of the wall thickness uniformity. The new combination method of ultrasonic auto-measuring and numerical control grinding proposed in this work would have a great significance for the development and application of nuclear reaction zirconium alloy container.

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Anisotropy Study of a Constrained Thin Walled Component Using a Range of Processing Control Factors

Volume 3: Design and Manufacturing ◽

10.1115/imece2007-42776 ◽

2007 ◽

Author(s):

Steven J. Sobolak ◽

Badih A. Jawad

Keyword(s):

Glass Fiber ◽

Wall Thickness ◽

Shrinkage Rate ◽

Measuring System ◽

Fiber Concentration ◽

Shrinkage Ratio ◽

Control Factors ◽

Injection Molded ◽

Thin Walled ◽

Processing Control

An anisotropy study was performed on a constrained thin-walled injection molded component using measurements made from a laser measuring system. Wall thickness and material glass fiber concentration were varied to determine their effects on parallel and perpendicular shrinkage rates. Several ranges of the processing control factors were used in the study. The shrinkages were determined and were described as a function of glass fiber concentration and wall thickness. The shrinkage ratio (a ratio representing the parallel shrinkage rate divided by the correlative perpendicular shrinkage rate) was used to investigate the influence of wall thickness and glass fiber (G.F.) concentration on shrinkage.

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Ultrasonic wall thickness measuring system—has has fixed sensors and positive test object guidance or freely moving test object and linear deviation detectors to control the sensor position

NDT & E International ◽

10.1016/0963-8695(91)90109-g ◽

1991 ◽

Vol 24 (6) ◽

pp. 328

Author(s):

Siemens AG

Keyword(s):

Wall Thickness ◽

Test Object ◽

Measuring System ◽

Positive Test ◽

Sensor Position ◽

Freely Moving

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Verification of Tin Car Body Production by Unconventional Stamping Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.693.364 ◽

2014 ◽

Vol 693 ◽

pp. 364-369

Author(s):

Miroslav Tomáš ◽

Juraj Hudák ◽

Dagmar Draganovská ◽

Peter Ižol

Keyword(s):

Tool Steel ◽

Wall Thickness ◽

Optical System ◽

Steel Sheet ◽

Measuring System ◽

Thickness Change ◽

Single Action ◽

Car Body ◽

Stamping Die ◽

Body Production

The contribution deals with verification of tin car body production using single action experimental stamping die. Two methods of car body production were verified - the first one used open die made of tool steel and the second one used closed die made of tool steel with Fibroflex at the bottom of the die. The tin steel sheet TS 245 with thickness 0.28 mm had been used for the car body production. The shapes of pressings were evaluated using the photogrammetric 3D measuring system ARGUS. The ARGUS optical system allowed evaluating the wall thickness change and the deformation on the surface of pressings as well. These values had been compared for both method of the tin car body production.

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Online Wall Thickness Control for Blow Molded Part Using Fuzzy Iterative Learning Control Algorithm

Volume 3: Design and Manufacturing ◽

10.1115/imece2007-43394 ◽

2007 ◽

Author(s):

Geng-Qun Huang ◽

Han-Xiong Huang

Keyword(s):

Control System ◽

Wall Thickness ◽

Iterative Learning Control ◽

Control Algorithm ◽

Learning Control ◽

Iterative Learning ◽

Measuring System ◽

Thickness Control ◽

Molded Part ◽

Part Thickness

Blow molded parts require a strict control of the wall thickness distributions so as to achieve the required mechanical performance and to minimize the usage of material. In this work, an online wall thickness control strategy for the extrusion blow molded part was presented. A multichannel ultrasonic thickness measuring system was used to obtain the part wall thickness. A feedback control system based on fuzzy iterative learning control (ILC) algorithm was designed and implemented to control the part thickness. Instead of using the pure numerical method, engineer knowledge and experience were combined in the control algorithm using fuzzy rules. The results showed that the online wall thickness control system developed in this work can automatically achieve the die gap profile and the resulting part thickness can satisfy the desire thickness distribution.

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