Title:
NON-DESTRUCTIVE MONITORING METHOD FOR INTERNAL PRESSURE OF PIPELINE
Document Type and Number:
WIPO Patent Application WO/2020/140418
Kind Code:
A1
Abstract:
Provided is a non-destructive monitoring method for internal pressure of the pipeline, an equation relationship is established by using the amount of change in an inner diameter of the pipeline being identical to the amount of change measured by a fiber grating sensor (3), through measuring a strain value of the fiber grating sensor (3) mounted on the pipeline, a pressure value in the pipeline can be effectively obtained, to monitor the pressure in the pipeline. The arc diameter of the contact surface of a sensor fixture (1) with the pipeline is the same as the outer diameter of the pipeline, the two sensor fixtures (1) are symmetrically pasted on the pipeline surface using epoxy resin glue; grooves are provided at both ends of the sensor fixture (1); the two ends of the fiber grating sensor (3) are respectively installed on the groove ends of the two sensor fixtures (1), and both ends of the fiber grating sensor (3) are in the same horizontal plane; a fiber grating sensor (3) is installed on the upper and lower ends of the sensor fixture (1), the distance between the groove ends of the two sensor fixtures (1) is the gauge length of the fiber grating sensor (3); a sensor fixture cover plate (2) is installed on the groove end of the sensor fixture (1), and is tightened with screws to fix the fiber grating sensor (3) on the sensor fixture (1). It has the advantages of simple principle, convenient mounting, non-destructive pipeline structure and remote real-time online monitoring, through changing a sensor gauge length and the sensor fixture size, pressure measurement of pipelines in different types of diameters can be achieved; non-destructive real-time and accurate monitoring of the internal pressure of the pipeline can be completed.
Inventors:
REN LIANG (CN)
WANG JIAJIAN (CN)
WANG JIAJIAN (CN)
Application Number:
PCT/CN2019/096181
Publication Date:
July 09, 2020
Filing Date:
July 16, 2019
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G01L11/02; F17D5/00; G01L7/02
Foreign References:
| CN109520666A | 2019-03-26 | |||
| CN107884114A | 2018-04-06 | |||
| CN101769442A | 2010-07-07 | |||
| CN101793573A | 2010-08-04 | |||
| CN2567548Y | 2003-08-20 | |||
| CN108369118A | 2018-08-03 | |||
| CN105973162A | 2016-09-28 | |||
| US6276215B1 | 2001-08-21 | |||
| DE19808222A1 | 1999-09-02 |
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