CN110487227A - A kind of on-line monitoring system and method using ultrasound examination pipeline circumferential strain - Google Patents
A kind of on-line monitoring system and method using ultrasound examination pipeline circumferential strain Download PDFInfo
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- CN110487227A CN110487227A CN201910919328.6A CN201910919328A CN110487227A CN 110487227 A CN110487227 A CN 110487227A CN 201910919328 A CN201910919328 A CN 201910919328A CN 110487227 A CN110487227 A CN 110487227A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000000007 visual effect Effects 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of on-line monitoring systems and method using ultrasound examination pipeline circumferential strain, including control display, signal generator, signal receiver, ultrasonic transducer and combined aural and visual alarm.The system enters pipeline to be checked by the ultrasonic signal of excitation predeterminated frequency, propagate the ultrasonic signal one week along pipeline peripheral surface, the time that record ultrasonic wave sends and receives, calculate pipeline circumferential strain, when the strain value is greater than pipeline circumferential strain safety threshold value, acoustooptic alarm signal an alert can control.The system and method can be realized the detection to pipeline circumferential strain, and has the characteristics that testing result accurate, high sensitivity, can monitor on-line and mobility is strong.
Description
Technical field
The present invention relates to a kind of on-line monitoring system and methods, and in particular to a kind of circumferentially to be answered using ultrasound examination pipeline
The on-line monitoring system and method for change.
Background technique
Currently, pressure pipeline is generally used in industries such as electric power, petroleum, chemical industry, pharmacy, and in most cases, pressure pipeline
The important task for conveying high temperature, high-pressure medium is born, pipeline can run under high temperature, hyperbaric environment for a long time, inevitably produce
Raw high-temp strain and fatigue damage, in addition, shrinkage deformation and pipe material abnormal position of the pipeline under temperature action may
The additional deformation that there is also, when total deflection reaches certain degree, the intensity of pipeline it is impossible to meet when bearing requirements,
It will fail, it is serious to generate leakage or rupture, lead to safety accident.Therefore, to the circumferential strain of pressure pipeline
Detected, and its change in long term situation grasped by monitoring means, to ensure equipment for a long time under high temperature and high pressure environment safety
It reliably runs, there is very important engineering significance.
The existing method detected to the strain of pipeline mainly includes steel hand tape mensuration, the survey of local train sensor
Amount method.Steel band type ruler mensuration is to wind pipe under test in the flexible steel mark made using invar alloy steel, to pipeline perimeter
Dependent variable is measured and manually calculates, it is larger that this method artificially measures operation bring error, and each secondary measurement data compares
Inaccuracy, and this method can only be detected under the conditions of unit outage, can not grasp the real-time change feelings of pipeline circumferential strain
Condition；Local train sensor measurement method is to arrange one or more strain transducers in pipe surface, utilizes these strain sensings
Device detects pipeline circumferential strain, and this method can only obtain the local train of pipeline, and can only detect some and fix and cut
Face does not have mobility.Therefore, it is necessary to design a kind of accurate testing result, high sensitivity, without shutdown, mobility
Strong system realizes the on-line monitoring to the circumferential strain situation of in-service pressure pipeline.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of all using ultrasound examination pipeline
To the on-line monitoring system and method for strain, which can be realized the detection to pipeline circumferential strain, with transfiniting
Alarm function, and have the characteristics that testing result accurate, high sensitivity, without shutting down and mobility is strong.
In order to achieve the above objectives, the on-line monitoring system packet of the present invention using ultrasound examination pipeline circumferential strain
Include control display, signal generator, signal receiver, ultrasonic transducer and combined aural and visual alarm, wherein ultrasonic transducer
It is in contact with the surface of pipeline, controls the control terminal of display and signal generator, the output end and acousto-optic of signal receiver
Alarm is connected, and ultrasonic transducer is connected with the input terminal of the output end of signal generator and signal receiver.
The output end of signal generator is connected by the first shielding connection cables with the emission port of ultrasonic transducer.
The receiving end of ultrasonic transducer is connected by secondary shielding connection cables with the input terminal of signal receiver.
Ultrasonic transducer is coupled with pipe surface.
On-line monitoring method of the present invention using ultrasound examination pipeline circumferential strain the following steps are included:
It controls display control signal generator and issues the pulse signal of predeterminated frequency, and the pulse signal is sent to
In ultrasonic transducer, so that the transmitting terminal of ultrasonic transducer emits ultrasonic signal and enters pipeline, the ultrasonic wave letter
Number along pipeline peripheral surface propagation capture and be converted to electric signal by the receiving end of ultrasonic transducer after a week, be then transferred to
In signal receiver, the electric signal received is sent to control display by signal receiver, controls display according to ultrasonic wave
The time difference that energy converter issues ultrasonic signal and receives between ultrasonic signal calculates the current perimeter of pipeline, then basis
The circumferential strain of the current perimeter of pipeline and the original circumference calculating pipeline of pipeline, when the strain value is greater than on pipeline circumferential strain
When limit value, control display controls combined aural and visual alarm signal an alert, and is realized by continuously detection to pipeline circumferential strain
On-line monitoring.
If the speed of ultrasonic signal propagation is C, the original Zhou Changwei L of pipeline0, the ultrasonic wave incidence of ultrasonic transducer
The distance between point and ultrasonic wave receiving point are LS, the launch time of ultrasonic signal is T1, the receiving time of ultrasonic signal is
T2, then circumferential propagation distance S=(T of the ultrasonic signal in pipeline2-T1) × C, the then current perimeter L=S+L of pipelineS。
The circumferential strain of pipeline
The frequency of the ultrasonic signal of ultrasonic transducer transmitting is 1-20MHz.
The invention has the following advantages:
On-line monitoring system and method for the present invention using ultrasound examination pipeline circumferential strain is in concrete operations
When, using ultrasonic distance measurement principle, propagated one week using ultrasonic signal along pipeline peripheral surface, by issuing ultrasonic signal
The current perimeter of pipeline is calculated with the time difference received between ultrasonic signal, then the perimeter and pipeline current using pipeline
The circumferential strain of original circumference calculating pipeline, the accuracy of detection is higher, without unit outage, it can be achieved that pipeline circumferential strain
On-line monitoring, detection sensitivity is higher, and system convenient disassembly, mobility is stronger, and there is pipeline circumferential strain to transfinite police
Report achievement can, danger signal can be fed back into related personnel in time, avoid safety accident.
Detailed description of the invention
Fig. 1 is the principle of the present invention figure；
Fig. 2 is the waveform diagram of ultrasonic signal in the detection process transmitting and receive process of the invention.
Wherein, 1 it is ultrasonic transducer, 2 be signal generator, 3 be signal receiver, 4 be control display, 5 is sound
Light crossing-signal, 6 are pipeline.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the on-line monitoring system of the present invention using ultrasound examination pipeline circumferential strain includes control
Display 4, signal generator 2, signal receiver 3, ultrasonic transducer 1 and combined aural and visual alarm 5, wherein ultrasonic transducer 1
Be in contact by couplant with 6 surface of pipeline, control the control terminal of display 4 and signal generator 2, signal receiver 3 it is defeated
Outlet and combined aural and visual alarm 5 are connected, the output end of ultrasonic transducer 1 and signal generator 2 and signal receiver 3 it is defeated
Enter end to be connected.
The output end of signal generator 2 is connected by the first shielding connection cables with the emission port of ultrasonic transducer 1
It connects；The receiving end of ultrasonic transducer 1 is connected by secondary shielding connection cables with the input terminal of signal receiver 3, is needed
It is connect it is noted that ultrasonic transducer 1 can also have mode by other with signal generator 2 and signal receiver 3.
With reference to Fig. 2, wherein T in Fig. 211 transmitting terminal of ultrasonic transducer recorded for control display 4 emits ultrasonic wave
The time of signal, T2The time of ultrasonic signal is captured for 1 receiving end of ultrasonic transducer that control display 4 records, this
The invention on-line monitoring method using ultrasound examination pipeline circumferential strain the following steps are included:
It controls 4 control signal generator 2 of display and issues the pulse signal of predeterminated frequency, and the pulse signal is sent
Into ultrasonic transducer 1, so that the transmitting terminal of ultrasonic transducer 1 emits ultrasonic signal and enters pipeline 6, the ultrasound
Wave signal captures and is converted to electric signal by the receiving end of ultrasonic transducer 1 after a week along the propagation of 6 peripheral surface of pipeline, then
It is transferred in signal receiver 3, the electric signal received is sent to control display 4 by signal receiver 3, controls display 4
It according to ultrasonic transducer 1 issues ultrasonic signal and receives time difference between ultrasonic signal to calculate pipeline 6 current
Perimeter, then according to the circumferential strain of the original circumference calculating pipeline 6 of the current perimeter of pipeline 6 and pipeline 6, when the strain value is big
When 6 circumferential strain safety threshold value of pipeline, control display 4 controls 5 signal an alert of acoustooptic alarm, which can
By continuously detecting the on-line monitoring realized to pipeline circumferential strain.
Specifically, set the speed of ultrasonic signal propagation as C, the original Zhou Changwei L of pipeline 60, ultrasonic transducer 1
The distance between ultrasonic wave incidence point and ultrasonic wave receiving point are LS, the launch time of ultrasonic signal is T1, ultrasonic signal
Receiving time is T2, then circumferential propagation distance S=(T of the ultrasonic signal in pipeline 62-T1) × C, then current week of pipeline 6
Long L=S+LS, the circumferential strain of pipeline 6When pipe detection position is real-time
Circumferential strain ε is greater than 6 circumferential strain safety threshold value ε of pipelinemWhen, it can control 5 signal an alert of combined aural and visual alarm.
Wherein, the frequency for the ultrasonic signal that ultrasonic transducer 1 emits is 1-20MHz.
In addition, the control display 4 includes controller and display, wherein controller and display, signal receiver
3 and signal generator 2 be connected, by obtained 6 circumferential strain of pipeline of display display measurement, while display pipes 6 are circumferential
Versus time curve is strained, so that testing result has preferable ornamental.
It should be noted that for the aforementioned method embodiment, for simple description, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described, because according to
According to the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know that,
The embodiments described in the specification are all preferred embodiments, and related movement is not necessarily essential to the invention.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of on-line monitoring system using ultrasound examination pipeline circumferential strain, which is characterized in that including controlling display
(4), signal generator (2), signal receiver (3), ultrasonic transducer (1) and combined aural and visual alarm (5), wherein ultrasonic waves
Energy device (1) is in contact with the surface of pipeline (6), the control terminal of control display (4) and signal generator (2), signal receiver
(3) output end and combined aural and visual alarm (5) is connected, the output end and letter of ultrasonic transducer (1) and signal generator (2)
The input terminal of number receiver (3) is connected.
2. the on-line monitoring system according to claim 1 using ultrasound examination pipeline circumferential strain, which is characterized in that
The output end of signal generator (2) is connected by the first shielding connection cables with the emission port of ultrasonic transducer (1).
3. the on-line monitoring system according to claim 2 using ultrasound examination pipeline circumferential strain, which is characterized in that
The receiving end of ultrasonic transducer (1) is connected by secondary shielding connection cables with the input terminal of signal receiver (3).
4. the on-line monitoring system according to claim 1 using ultrasound examination pipeline circumferential strain, which is characterized in that
Ultrasonic transducer (1) is coupled with pipeline (6) surface.
5. a kind of on-line monitoring method using ultrasound examination pipeline circumferential strain, which comprises the following steps:
It controls display (4) control signal generator (2) and issues the pulse signal of predeterminated frequency, and the pulse signal is sent
Into ultrasonic transducer (1), so that the transmitting terminal of ultrasonic transducer (1) emits ultrasonic signal and enters pipeline (6), institute
Ultrasonic signal is stated to be captured and be converted to by the receiving end of ultrasonic transducer (1) after a week along the propagation of pipeline (6) peripheral surface
Electric signal is then transferred in signal receiver (3), and the electric signal received is sent to control display by signal receiver (3)
Device (4), control display (4) issue ultrasonic signal according to ultrasonic transducer (1) and receive between ultrasonic signal
Time difference calculates pipeline (6) current perimeter, then the circumference calculating original according to the current perimeter of pipeline (6) and pipeline (6)
The circumferential strain of pipeline (6), when the strain value is greater than pipeline (6) circumferential strain safety threshold value, control display (4) control
Acoustooptic alarm (5) signal an alert, and by continuously detection realization to the on-line monitoring of pipeline (6) circumferential strain.
6. the on-line monitoring method according to claim 5 using ultrasound examination pipeline circumferential strain, which is characterized in that
If the speed of ultrasonic signal propagation is C, the original Zhou Changwei L of pipeline (6)0, the ultrasonic wave incidence point of ultrasonic transducer (1)
The distance between ultrasonic wave receiving point is LS, the launch time of ultrasonic signal is T1, the receiving time of ultrasonic signal is
T2, then circumferential propagation distance S=(T of the ultrasonic signal in pipeline (6)2-T1) × C, the then current perimeter L=S+ of pipeline (6)
LS。
7. the on-line monitoring method according to claim 6 using ultrasound examination pipeline circumferential strain, which is characterized in that
The circumferential strain of pipeline (6)
8. the on-line monitoring method according to claim 5 using ultrasound examination pipeline circumferential strain, which is characterized in that
The frequency of the ultrasonic signal of ultrasonic transducer (1) transmitting is 1-20MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919328.6A CN110487227A (en) | 2019-09-26 | 2019-09-26 | A kind of on-line monitoring system and method using ultrasound examination pipeline circumferential strain |
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| CN201910919328.6A CN110487227A (en) | 2019-09-26 | 2019-09-26 | A kind of on-line monitoring system and method using ultrasound examination pipeline circumferential strain |
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| CN110487227A true CN110487227A (en) | 2019-11-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608495A (en) * | 2022-03-09 | 2022-06-10 | 太原理工大学 | Experimental device and experimental method for detecting pipeline deformation and stress |
| CN114636394A (en) * | 2022-03-14 | 2022-06-17 | 苏州西热节能环保技术有限公司 | Online monitoring method for deformation risk of hyperbolic cooling tower and special system thereof |
| WO2022247036A1 (en) * | 2021-05-28 | 2022-12-01 | 西安热工研究院有限公司 | System and method for measuring circumference of pipeline on the basis of ultrasonic waves |
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| CN2303265Y (en) * | 1997-08-26 | 1999-01-06 | 中国科学院武汉岩土力学研究所 | Sliding trough like ring deformation measuring arrangement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022247036A1 (en) * | 2021-05-28 | 2022-12-01 | 西安热工研究院有限公司 | System and method for measuring circumference of pipeline on the basis of ultrasonic waves |
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