Design and Verification of a Sensing Device for Deformation Measurement of High Temperature Pipes

Jia, Jiuhong; Hu, Xiaoyin; An, Zi Liang; Xuan, Fu‐Zhen; Tu, S.T.

doi:10.1115/1.4003461

Cited by 9 publications

(10 citation statements)

References 15 publications

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“…Based on the above equations, the total maximum and minimum rotation angles of flange joints can be obtained approximately by (24) Especially, the total maximum rotation angle can be expressed as (25) Therefore, the rotation angle of flange ring under external bending moment can be obtained easily based Eqs. (18) to (25).…”

Section: Calculation Of the Rotation Angle Of Flange Jointsmentioning

confidence: 99%

“…Therefore, the rigidity and amplification, which are regarded as the key parameters of flexure-hinge mechanisms, are widely investigated by many researchers in recent years [19,20,21,22] . Recently, Tu and Xuan et al [23,24,25,26] developed various extensometers to monitor the creep strain of pipeline at elevated temperature, especially by magnifying mechanisms. However, according to the best knowledge of authors, very few references introduced the deformation monitoring of bolted flange joints during the assemble or operation process, especially the rotation angle of flange.…”

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confidence: 99%

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Measurement of small rotation angle of flange joints by a novel flexure magnifying mechanism

et al. 2019

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Bolted flange joints are indispensable components in process industries due to the good sealing, assemble and disassemble capacities. Generally, the flange rigidity characterized by the rotation angle is a key index to evaluate the sealing tightness of flange joints. However, the rotation angle of flange is usually too small (less than 1º) to monitor during the assemble and operation stages. Accordingly, a novel flexure magnifying mechanism is designed to measure the small rotation angle of flange joints under internal pressure and external bending moment. The magnification factor and calculation approach of the flexure amplification mechanism are deduced and verified by experimental data and finite element simulation. Results indicate that the proposed measuring apparatus has good performance to monitor the maximum rotation angle. It is of great interest that the measured location of the maximum rotation angle is in good agreement with that in the experiment, and the average error is 7.3%, which is acceptable for practical application. Additionally, the leakage rate at the top of flange joints slowly and almost linearly increases with the increment of external bending moment ascribing to the decrease the gasket stress near the top of flange joints.

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Section: Calculation Of the Rotation Angle Of Flange Jointsmentioning

confidence: 99%

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confidence: 99%

Measurement of small rotation angle of flange joints by a novel flexure magnifying mechanism

et al. 2019

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“…And an experiment system is set up, shown in Fig. 2, which is nearly the same with the test system in References [9]. The device in the red dashed line box is the designed sensing device, which is mounted to the specimen by fixing blocks.…”

Section: High Temperature Experimental Verificationmentioning

confidence: 99%

“…Although many kinds of direct sensors have been developed, their applications are limited to the temperature below 500˚C and short operation periods [5][6][7][8]. As a better alternative solution, extension-based sensing devices are designed and verified [9,10]. Test results show that the designed devices can work at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Design and Test of a New Type Amplifier-based Sensing Device for High Temperature Deformation Monitoring

Jia¹,

Duan²,

Hu³

et al. 2016

Proceedings of the 2016 6th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2016)

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In order to solve the problem in monitoring high temperature strain coming from harsh working environment and extremely small deformation of components, a flexure-hinged displacement amplifier is proposed to be integrated in a sensing device in order to design a more sensitive sensor to accurately online monitor small deformation of high temperature components. The structure and the work principle of the sensing device are introduced. A prototype of the sensing device is fabricated. Then the tests to verify the reliability and amplification ability are carried out at laboratory. Results demonstrate that the designed sensing device has satisfactory working performance.

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“…High temperature components are applied comprehensively in aerospace and process industries. Many researchers have suggested that monitoring the structural health of components with permanently installed transducers is a useful way to maintain their safety [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Permanent installation will allow measurements to be more frequent and remove errors introduced by re-installing transducers.…”

Section: Introductionmentioning

confidence: 99%

Design of Waveguide Bars for Transmitting a Pure Shear Horizontal Wave to Monitor High Temperature Components

et al. 2017

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Abstract:Guided wave technique could be a possible method for monitoring components working in high temperature above 350 • C. However, this would require the design of an appropriate waveguide bar to transmit the wave, so that its sensing part is not influenced by the high temperature. In the present study, the shape of waveguide bars is designed based on the analysis of wave source characteristics. The critical frequency-width and frequency-thickness products of waveguide bars are analyzed theoretically and numerically to transmit the zeroth shear horizontal wave SH0* in bars. The results show that waveguide bars can cut off all the other wave modes when their frequency-thickness products are smaller than the critical value fd*, and frequency-width products are not smaller than the critical value fw*. Six waveguide bars are designed and fabricated based on the design criteria, and an experiment system is set up to check their work performance. The testing results indicate that the wave signals of the SH0* mode propagate clearly in waveguide bars, and cut off all the other modes when the frequency-thickness products and frequency-width products of the bars meet the design criteria. It is also demonstrated that the dependency of the experimental group velocity of each waveguide bar on frequency is in good agreement with the numerical result. High-temperature experiments also validate the reliability of the designed waveguide bars. Therefore, the critical frequency-thickness product and frequency-width product can be the basis for the design of the waveguide bars.

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Design and Verification of a Sensing Device for Deformation Measurement of High Temperature Pipes

Cited by 9 publications

References 15 publications

Measurement of small rotation angle of flange joints by a novel flexure magnifying mechanism

Measurement of small rotation angle of flange joints by a novel flexure magnifying mechanism

Design and Test of a New Type Amplifier-based Sensing Device for High Temperature Deformation Monitoring

Design of Waveguide Bars for Transmitting a Pure Shear Horizontal Wave to Monitor High Temperature Components

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