CN109900199B - Bending sensor structure and method for detecting deformation of pipeline - Google Patents
Bending sensor structure and method for detecting deformation of pipeline Download PDFInfo
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Abstract
The invention relates to a bending sensor, in particular to a bending sensor structure and a method for detecting pipeline deformation, which are characterized in that: the flexible film bending sensor at least comprises four bending sensors on a flexible film, wherein the first bending sensor is parallel to one edge of the flexible film, the second bending sensor is perpendicular to the first bending sensor, the first bending sensor and the second bending sensor form a T shape, the third bending sensor and the fourth bending sensor are respectively fixed on two right angles of the T shape, and the output ends of the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor are respectively electrically connected with an interface. The bending sensor structure and the method for detecting the pipeline deformation have the advantages of simple structure, convenience in monitoring, and capability of monitoring the pipeline deformation in a long-distance, continuous and real-time online manner.
Description
Technical Field
The invention relates to a bending sensor, in particular to a bending sensor structure and a method for detecting deformation of a pipeline.
Background
With the rapid development of national economy, the requirement on energy is more and more urgent. Oil and gas resources play a vital role in production and life as important energy sources. Among the transportation modes, pipeline transportation with high reliability and low transportation cost has played an increasingly important role in the transportation of petroleum resources and has become a main transportation channel of petroleum. However, as oil pipelines in China are continuously increased and oil pipelines are increasingly lengthened, accidents of the oil pipelines are increased, and therefore effective measures must be taken to prevent the pipelines from being invalid and reduce the accidents. Excessive deformation is one of the forms causing pipeline failure, so monitoring deformation of oil and gas pipelines becomes one of the research directions in the industry.
The traditional monitoring method for pipeline deformation needs to monitor the pipeline manually and periodically, although the method is easy to implement, the difficulty of processing the acquired signals is high, the technologies are easily influenced by the outside, most importantly, the real-time monitoring cannot be carried out, and therefore the actual deformation state of the pipeline is difficult to reflect.
In recent years, the monitoring of the deformation of the pipeline by the optical fiber can be used for measuring the strain in a long-distance, continuous and real-time online manner, and the method becomes a new method for monitoring the health of the pipeline, but the evaluation capability of the method is poor, the cost of the optical fiber is high, and the method is not suitable for monitoring the long-distance pipeline.
Disclosure of Invention
The invention aims to provide a bending sensor structure and a method for detecting pipeline deformation, which have the advantages of simple structure, convenience in monitoring and capability of continuously monitoring the pipeline deformation in real time in a long distance on line.
The technical scheme of the invention is as follows: a bending sensor structure for detecting deformation of a pipeline is characterized in that: the flexible film bending sensor at least comprises four bending sensors on a flexible film, wherein the first bending sensor is parallel to one edge of the flexible film, the second bending sensor is perpendicular to the first bending sensor, the first bending sensor and the second bending sensor form a T shape, the third bending sensor and the fourth bending sensor are respectively fixed on two right angles of the T shape, and the output ends of the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor are respectively electrically connected with an interface.
The four bending sensors on the flexible membrane are strain resistors printed directly on the flexible membrane.
The first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor on the flexible membrane are independent bending sensors with the same performance and fixed on the flexible membrane, and sealing silica gel is arranged around the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor.
The third bending sensor and the fourth bending sensor which are respectively fixed on the two right angles of the T-shaped are arranged according to 30-60 degrees, and the optimal angle is 45 degrees.
Two sides of the flexible membrane vertical to the first bending sensor are provided with magic tape A/B surfaces for bending connection, when the flexible membrane is wound on a measured pipeline, the magic tape A/B surfaces are used for fixing, and the lower plane of the flexible membrane is in uniform surface contact with the measured pipeline surface.
The four bending sensors of the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor have the same structure change resistance characteristic value output.
A bending sensor measuring method for detecting deformation of a pipeline comprises the following steps: the method is characterized in that:
the flexible film bending sensor at least comprises four bending sensors on a flexible film, wherein the first bending sensor is parallel to one edge of the flexible film, the second bending sensor is perpendicular to the first bending sensor, the first bending sensor and the second bending sensor form a T shape, the third bending sensor and the fourth bending sensor are respectively fixed at two right angles of the T shape, and the output ends of the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor are respectively and electrically connected with an interface; winding a flexible film and a first bending sensor, a second bending sensor, a third bending sensor and a fourth bending sensor on the flexible film on a measured pipeline for fixing, electrically connecting an interface for connecting the bending sensors with an acquisition node, wirelessly transmitting acquired resistance values of four paths of bending sensors to a processing center by the acquisition node, and analyzing the resistance values of the four paths of bending sensors to obtain a pipeline deformation form and a deformation state;
the deformation of the pipeline can be classified into bending, torsion and expansion, and when the three deformations of the bending, torsion and expansion are measured, a resistance change value of a second bending sensor parallel to the axis of the pipeline, a resistance change value of a third bending sensor and a resistance change value of a fourth bending sensor which are 45 degrees with the axis, and a resistance change value of a first bending sensor in the circumferential direction need to be obtained;
when the pipeline is not deformed, each path of four bending sensors, namely a first bending sensor, a second bending sensor, a third bending sensor and a fourth bending sensor outputs an initial resistance value;
when the pipeline is bent and twisted, the resistance of a first bending sensor parallel to the axis of the pipeline, a third bending sensor and a fourth bending sensor which form an angle of 45 degrees with the axis can change, and the resistance of a second bending sensor in the circumferential direction can not change;
when the pipeline is subjected to expansion deformation, only the resistance value of the second bending sensor in the circumferential direction is changed, and the resistance values of the first bending sensor parallel to the axis of the pipeline, the third bending sensor and the fourth bending sensor at an angle of 45 degrees with the axis are not changed;
when the pipeline is subjected to bending deformation, torsional deformation and expansion deformation, the resistance values of the four bending sensors, namely the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor, are changed;
the magnitude of the resistance change values of the axial first bending sensor, the third bending sensor and the fourth bending sensor which are at 45 degrees with the axial line reflects the bending and twisting degree of the pipeline; the magnitude of the resistance change value of the second circumferential bending sensor reflects the pipe expansion degree;
the interface with the flexible membrane is electrically connected with a collection node microprocessor, the processor obtains resistance change values of a first bending sensor, a second bending sensor, a third bending sensor and a fourth bending sensor which are obtained by measuring a bending sensor film, the resistance change values are wirelessly transmitted to the sink node, and the sink node transmits data to the server for data processing and analysis through the wireless public network 4G module.
The invention has the advantages that: through distributing four ways bending sensor on the flexible film, when twining the flexible film on the pipeline of measurationing, fix through two fixed limits, make the lower plane of flexible film evenly contact with the pipeline face of measurationing. After the four-way bending sensor is connected with the detection circuit, the pipeline is bent, twisted and expanded to deform, the four-way bending sensor outputs different resistance values to correspond to each other, the state of the pipeline can be accurately obtained through data processing and analysis of the detection circuit, and a basis is provided for pipeline management and maintenance and acquisition of characteristics of geographic information where the pipeline is located.
Drawings
The specific structure and the specific implementation mode of the invention are further explained by combining the attached drawings of the pipeline example:
FIG. 1 is a schematic view of a bending sensor according to embodiment 1 of the present invention;
FIG. 2 is an illustration of the use of a bend sensor in accordance with an embodiment of the invention;
fig. 3 is a schematic structural diagram of a bending sensor according to embodiment 2 of the present invention.
In the figure, 1, the first bending sensor; 2. a second bending sensor; 3. a third bend sensor; 4. a fourth bending sensor; 5. a flexible film; 6. an interface; 7. a pipeline; 8. magic tape A \ B surface; 9. sealing the silica gel; 10. collecting nodes; 11. a processing center.
Detailed Description
Example 1
As shown in fig. 1 and 2, a bending sensor structure for detecting deformation of a pipe at least comprises four bending sensors on a flexible film 5, a first bending sensor 1 is parallel to one edge of the flexible film, a second bending sensor 2 is perpendicular to the first bending sensor 1, the first bending sensor 1 and the second bending sensor 2 form a T shape, a third bending sensor 3 and a fourth bending sensor 4 are respectively fixed on two right angles of the T shape, and output ends of the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 are respectively and electrically connected with an interface 6; the four bending sensors on the flexible membrane are strain gauges printed directly on the flexible membrane 5. The third bending sensor 3 and the fourth bending sensor 4 are respectively fixed at two right angles of the T-shape and are arranged at 30 degrees to 60 degrees, and the optimal angle is 45 degrees.
Two sides of the flexible film 5 perpendicular to the first bending sensor 1 are provided with magic tape A \ B surfaces 8 for connection, and when the flexible film is wound on the measured pipeline 7, the magic tape A \ B surfaces 8 are used for fixing, so that the lower plane of the flexible film 5 is in uniform surface contact with the measured pipeline surface.
The first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 have the same structure change resistance characteristic value output.
The working principle of the invention is as follows:
the flexible membrane 5 and the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 on the flexible membrane 5 are wound on a measured pipeline 7 to be fixed, an interface 6 for connecting the bending sensors is electrically connected with an acquisition node 10, the acquisition node 10 transmits the acquired resistance values of the four-way bending sensors to a processing center 11 in a wireless mode, and the deformation form and the deformation state of the pipeline 7 are obtained by analyzing the resistance values of the four-way bending sensors.
The deformation of the pipeline can be classified into bending, torsion and expansion, and when the three deformations of the bending, torsion and expansion are measured, the resistance change value of a second bending sensor 2 parallel to the axis of the pipeline, the resistance change value of a third bending sensor 3 and a fourth bending sensor 4 which form an angle of 45 degrees with the axis and the resistance change value of a first bending sensor 1 in the circumferential direction need to be obtained.
When the pipeline 7 is not deformed, each path of the four bending sensors, namely the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 outputs an initial resistance value;
when the pipeline 7 is bent and twisted, the resistance of the first bending sensor 1 parallel to the pipeline axis, the third bending sensor 3 and the fourth bending sensor 4 which are at 45 degrees with the pipeline axis can change, and the resistance of the second bending sensor 2 in the circumferential direction can not change;
when the pipeline 7 is subjected to expansion deformation, only the resistance value of the second bending sensor 2 in the circumferential direction is changed, and the resistances of the first bending sensor 1 parallel to the axis of the pipeline, the third bending sensor 3 and the fourth bending sensor 4 at an angle of 45 degrees with the axis are not changed;
when the pipeline 7 is subjected to bending deformation, torsional deformation and expansion deformation, the resistance values of the four bending sensors, namely the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 are changed;
the magnitude of the resistance change values of the axial first bending sensor 1 and the third bending sensor 3 and the fourth bending sensor 4 which are at 45 degrees to the axial line reflects the degree of bending and torsion of the pipeline; and the magnitude of the resistance change value of the second circumferential bending sensor 2 reflects the degree of pipe expansion.
The interface 6 with the flexible membrane 5 is electrically connected with a collection node microprocessor, the processor obtains resistance change values of the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 which are obtained by the measurement of the bending sensor thin film, the resistance change values are transmitted to the sink node through wireless transmission, and the sink node transmits data to the server through the wireless public network 4G module for data processing and analysis.
Example 2
As shown in fig. 3, a bending sensor structure for detecting deformation of a pipe at least comprises four bending sensors on a flexible membrane 5, a first bending sensor 1 is parallel to one edge of the flexible membrane, a second bending sensor 2 is perpendicular to the first bending sensor 1, the first bending sensor 1 and the second bending sensor 2 form a T shape, a third bending sensor 3 and a fourth bending sensor 4 are respectively fixed on two right angles of the T shape, and output ends of the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 are respectively electrically connected with an interface 6; the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 on the flexible film are independent bending sensors with the same performance and fixed on the flexible film, sealing silica gel 9 is arranged around the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4, and the third bending sensor 3 and the fourth bending sensor 4 are respectively fixed on two right angles of a T shape and are arranged according to 30 degrees.
Two sides of the flexible film 5 perpendicular to the first bending sensor 1 are provided with magic tape A \ B surfaces 8 for bending connection, and when the flexible film is wound on the measured pipeline 7, the magic tape A \ B surfaces 8 are used for fixing, so that the lower plane of the flexible film 5 is in uniform surface contact with the measured pipeline surface.
The first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 have the same structure change resistance characteristic value output.
In the invention, the structure of the embodiment 1 is basically the same as that of the embodiment 2, and the first bending sensor 1, the second bending sensor 2, the third bending sensor 3 and the fourth bending sensor 4 are directly designed on the flexible PCB in the former. The latter is glued the bending sensor that technology integrated independent product through 502 glue, scribbles sealed silica gel 9 in every bending sensor periphery simultaneously, guarantees the dampproofing of product, the intaking. Affecting the detection effect.
The process of example 1 is different from that of example 2, but the detection method is the same, so that the method description is omitted in example 2.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (1)
1. A bending sensor measuring method for detecting pipeline deformation is characterized by comprising the following steps:
the flexible film bending sensor at least comprises four bending sensors on a flexible film, wherein the first bending sensor is parallel to one edge of the flexible film, the second bending sensor is perpendicular to the first bending sensor, the first bending sensor and the second bending sensor form a T shape, the third bending sensor and the fourth bending sensor are respectively fixed at two right angles of the T shape, and the output ends of the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor are respectively and electrically connected with an interface; winding the flexible membrane and a first bending sensor, a second bending sensor, a third bending sensor and a fourth bending sensor on the flexible membrane on a measured pipeline for fixing, electrically connecting an interface for connecting the bending sensors with an acquisition node, wirelessly transmitting the acquired resistance values of the four bending sensors to a processing center by the acquisition node, and analyzing the resistance values of the four bending sensors to obtain the deformation form and the deformation state of the pipeline;
the deformation of the pipeline can be classified into bending, torsion and expansion, and when the three deformations of the bending, torsion and expansion are measured, a resistance change value of a second bending sensor parallel to the axis of the pipeline, a resistance change value of a third bending sensor and a fourth bending sensor which form an angle of 45 degrees with the axis and a resistance change value of a first bending sensor in the circumferential direction need to be obtained;
when the pipeline is not deformed, each path of four bending sensors, namely a first bending sensor, a second bending sensor, a third bending sensor and a fourth bending sensor outputs an initial resistance value;
when the pipeline is bent and deformed in a twisting mode, the resistance of a second bending sensor parallel to the axis of the pipeline, a third bending sensor and a fourth bending sensor which form an angle of 45 degrees with the axis can be changed, and the resistance value of a first circumferential bending sensor can not be changed;
when the pipeline is subjected to expansion deformation, only the resistance value of the first bending sensor in the circumferential direction is changed, and the resistance of the second bending sensor parallel to the axis of the pipeline, the third bending sensor at an angle of 45 degrees with the axis and the fourth bending sensor is not changed;
when the pipeline is subjected to bending, torsion deformation and expansion deformation, the resistance values of the four bending sensors, namely the first bending sensor, the second bending sensor, the third bending sensor and the fourth bending sensor, are changed;
the resistance change values of the second bending sensor parallel to the pipeline axis, the third bending sensor and the fourth bending sensor at 45 degrees with the pipeline axis are reflected by the bending and twisting degrees of the pipeline; the magnitude of the resistance change value of the first circumferential bending sensor reflects the pipe expansion degree;
the interface with flexible membrane is connected with microprocessor, and microprocessor obtains the first bending sensor that bending sensor measured, second bending sensor, third bending sensor, the resistance variation value of fourth bending sensor, through wireless transmission to the collection node, and the collection node is through wireless public network 4G module with data transfer to the processing center and carry out data processing and analysis again.
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| CN110886967A (en) * | 2019-11-07 | 2020-03-17 | 中国石油天然气集团公司管材研究所 | Pipeline state sensing device and using method |
| CN111779747A (en) * | 2020-07-31 | 2020-10-16 | 中国航发贵阳发动机设计研究所 | Method for pasting and pressurizing normal-temperature strain gauge of conduit test piece |
| CN113221354A (en) * | 2021-05-11 | 2021-08-06 | 西安电子科技大学 | Pipeline bending deformation fitting algorithm |
| CN115854855B (en) * | 2023-02-27 | 2023-05-09 | 中国科学院深海科学与工程研究所 | Flexible tensile strain sensor, and preparation method and application thereof |
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| CN103837076A (en) * | 2014-03-12 | 2014-06-04 | 苏州大学 | Monitoring system and method |
| CN104713912A (en) * | 2015-04-03 | 2015-06-17 | 巫立斌 | Underground pipeline testing system based on strain membranes |
| CN106996806A (en) * | 2017-05-10 | 2017-08-01 | 武汉工程大学 | Pipeline health status on-line detecting system |
| CN208011315U (en) * | 2017-12-31 | 2018-10-26 | 大连船舶重工集团有限公司 | Pepe monitoring system for maritime platform |
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