CN207196096U - Detection inside and outside wall defect distinguishing sensor in pipe leakage - Google Patents
Detection inside and outside wall defect distinguishing sensor in pipe leakage Download PDFInfo
- Publication number
- CN207196096U CN207196096U CN201721075518.7U CN201721075518U CN207196096U CN 207196096 U CN207196096 U CN 207196096U CN 201721075518 U CN201721075518 U CN 201721075518U CN 207196096 U CN207196096 U CN 207196096U
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- Prior art keywords
- sensor
- eddy current
- signal
- outside wall
- hall
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Abstract
Detection inside and outside wall defect distinguishing sensor in a kind of pipe leakage is the utility model is related to, including matrix, the centre of described matrix are provided with integration probe, the both sides of the integration probe are provided with permanent magnet, steel brush are provided with the permanent magnet；The integration probe includes multiple Hall sensors and multiple eddy current sensors, and the Hall sensor is used to detect magnetic leakage signal to determine that pipeline whether there is defect；It is existing defects that the eddy current sensor, which is used to detect inner surface of pipeline,；The output end of the integration probe is also connected with signal processing circuit.The defects of the utility model can be to inner and outer walls of pipeline is effectively distinguished.
Description
Technical field
Leakage field Inner Examination Technology on Pipeline field is the utility model is related to, inside and outside being detected in a kind of pipe leakage
Wall defect distinguishing sensor.
Background technology
Long-distance oil ＆ gas pipeline plays key effect in the transport of the oil gas energy, is referred to as " energy blood vessels ".Pipeline makes
The defects of corrosion of inner and outer wall can occur during, it have impact on pipe safety performance, it is therefore desirable to periodically to this kind of pipe
Road is tested detection.Pipe leakage inner detection technique is that detection field is commonly used in long-distance oil ＆ gas pipeline both at home and abroad at present
Detection technique, magnetic leakage signal can effectively detect defect present on pipeline wall thickness, can not but judge defect positioned at pipe
Road inwall or outer wall.
Utility model content
Technical problem to be solved in the utility model is to provide detection inside and outside wall defect in a kind of pipe leakage and distinguishes biography
Sensor, can be to inner and outer walls of pipeline the defects of, are effectively distinguished.
Technical scheme is used by the utility model solves its technical problem：There is provided in a kind of pipe leakage inside and outside detection
Wall defect distinguishing sensor, including matrix, the centre of described matrix are provided with integration probe, and the both sides of the integration probe are set
There is permanent magnet, steel brush is provided with the permanent magnet；The integration probe includes multiple Hall sensors and multiple currents sensings
Device, the Hall sensor are used to detect magnetic leakage signal to determine that pipeline whether there is defect；The eddy current sensor is used to examine
It is existing defects to survey inner surface of pipeline；The output end of the integration probe is also connected with signal processing circuit.
Described matrix both sides are provided with leather cup.
The signal processing circuit includes hall signal process circuit and eddy current signal process circuit, at the hall signal
Manage circuit connection Hall sensor, the signal detected for exporting Hall sensor；The eddy current signal process circuit connection
Eddy current sensor, the signal detected for exporting eddy current sensor.
The eddy current signal process circuit include be sequentially connected in series electric bridge, one-level amplifying circuit, phase-sensitive detection circuit, two level
Amplifying circuit and modulus Acquisition Circuit；The defects of phase-sensitive detection circuit is used to detect signal is converted to amplitude signal.
The electric bridge shares two groups, is made up of respectively two groups of diagonal coils on the eddy current sensor.
The integration probe circlewise structure.
Beneficial effect
As a result of above-mentioned technical scheme, the utility model compared with prior art, has the following advantages that and accumulated
Pole effect：The utility model is using the integrated probe of Hall sensor and eddy current sensor, when Hall sensor and vortex pass
When sensor is detected simultaneously by defect, defect is represented in the inside of pipeline, when only Hall sensor detects defect, represents to lack
Pipeline external is trapped in, so as to the defects of effectively having distinguished inner and outer walls of pipeline.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of eddy current signal process circuit in the utility model；
Fig. 3 is the position view of eddy current sensor coil in the utility model；
Fig. 4 is defects detection schematic diagram；
Signal schematic representation when Fig. 5 is the inside existing defects of pipeline；
Signal schematic representation when Fig. 6 is the outside existing defects of pipeline.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
First embodiment of the present utility model is related to detection inside and outside wall defect distinguishing sensor in a kind of pipe leakage, such as
Shown in Fig. 1, including matrix 1, the centre of described matrix 1 are provided with integration probe 2, and the both sides of the integration probe 2 are provided with forever
Magnet 5, steel brush 6 is provided with the permanent magnet 5；The integration probe 2 is cyclic structure, including multiple Hall sensors and more
Individual eddy current sensor, the Hall sensor are used to detect magnetic leakage signal to determine that pipeline whether there is defect；The vortex passes
It is existing defects that sensor, which is used to detect inner surface of pipeline,；The output end of the integration probe 2 is also connected with signal processing circuit.Institute
State the both sides of matrix 1 and be provided with leather cup 7.In present embodiment, the eddy current sensor passes through double bridge structure and signal transacting electricity
Road is connected.
The signal processing circuit includes hall signal process circuit and eddy current signal process circuit, at the hall signal
Manage circuit connection Hall sensor, the signal detected for exporting Hall sensor；The eddy current signal process circuit connection
Eddy current sensor, the signal detected for exporting eddy current sensor.
As shown in Fig. 2 the eddy current signal process circuit includes electric bridge, one-level amplifying circuit, the phase sensitivity inspection being sequentially connected in series
Wave circuit, second amplifying circuit and modulus Acquisition Circuit；The defects of phase-sensitive detection circuit is used to detect signal conversion
For amplitude signal, the scope of driving frequency is 20K~800KHz in figure.In present embodiment, electric bridge shares two groups, and two groups of knots
Structure is identical, is made up of (see Fig. 3) two groups of diagonal coils on the eddy current sensor respectively, i.e., one group diagonal coil L1 and
L4 and two arm resistance R1 and R2 form one group of electric bridge, another group of diagonal coil L2 and L3 and another two arm resistance R3 and
R4 forms another group of electric bridge.
By setting two groups of electric bridges to be directed to the defects of different so that it is different the defects of can detect.Such as Fig. 4 institutes
Show, when only setting coil L1 and coil L4, having can not detect in the defects of coil L1 and coil L4 directions, when only setting
When putting coil L2 and coil L3, having can not detect in the defects of coil L2 and coil L3 directions, when two groups of electric bridges of setting
When, then can avoid above mentioned problem, effective detection to it is all the defects of.
The utility model uses integrated probe, and wherein Hall sensor is used for detecting magnetic leakage signal, and currents sensing
The whether defective of inner surface of pipeline only detected using kelvin effect for device, when simultaneously Hall sensor and eddy current sensor can be examined
When measuring defect, show defect inside pipeline, and ought only only have Hall sensor to have signal, and eddy current sensor is without letter
Number when, show that defect is located at pipeline external.
The utility model using when comprise the following steps：
(1) will in above-mentioned pipe leakage detect inside and outside wall defect distinguishing sensor be put into inside pipeline 8, and steel brush 6 with
The inwall of pipeline 8 contacts with each other, so that matrix 1, permanent magnet 5, steel brush 6 and the inwall of pipeline 8 form the magnetic field of a closure
The route in loop, i.e. magnetic field is then passed through steel brush on permanent magnet to pipeline upper half first to pass through the permanent magnet in left side from matrix
The inwall in portion, then eventually pass back to matrix to right side permanent magnet by the steel brush on the permanent magnet of right side；When defect is run into,
Stray field can be produced in the tube wall of fault location, Hall sensor is exactly to gather this stray field signal.
(2) data of the output end of signal processing circuit are preserved, then shown offline with DAS
Show, when Hall sensor and eddy current sensor are detected simultaneously by flaw indication, defect is represented in the inside of pipeline, when only suddenly
When your sensor detects defect, represent defect in the outside of pipeline.Signal hint when Fig. 5 is the inside existing defects of pipeline
Figure, i.e. sensor pass through signal caused by inner wall defect 4 in Fig. 1；Signal hint when Fig. 6 is the outside existing defects of pipeline
Figure, i.e. sensor pass through signal caused by outer wall defect 3 in Fig. 1.
Claims (6)
1. detection inside and outside wall defect distinguishing sensor in a kind of pipe leakage, including matrix (1), it is characterised in that described matrix
(1) centre is provided with integration probe (2), and the both sides of the integration probe (2) are provided with permanent magnet (5), the permanent magnet (5)
On be provided with steel brush (6)；The integration probe (2) includes multiple Hall sensors and multiple eddy current sensors, and the Hall passes
Sensor is used to detect magnetic leakage signal to determine that pipeline whether there is defect；The eddy current sensor is used to detect inner surface of pipeline
Existing defects；The output end of the integration probe (2) is also connected with signal processing circuit.
2. detection inside and outside wall defect distinguishing sensor in pipe leakage according to claim 1, it is characterised in that the base
Body (1) both sides are provided with leather cup (7).
3. detection inside and outside wall defect distinguishing sensor in pipe leakage according to claim 1, it is characterised in that the letter
Number process circuit includes hall signal process circuit and eddy current signal process circuit, and the hall signal process circuit connects Hall
Sensor, the signal detected for exporting Hall sensor；The eddy current signal process circuit connects eddy current sensor, is used for
The signal that output eddy current sensor detects.
4. detection inside and outside wall defect distinguishing sensor in pipe leakage according to claim 3, it is characterised in that the whirlpool
Stream signal processing circuit includes electric bridge, one-level amplifying circuit, phase-sensitive detection circuit, second amplifying circuit and the modulus being sequentially connected in series
Acquisition Circuit；The defects of phase-sensitive detection circuit is used to detect signal is converted to amplitude signal.
5. detection inside and outside wall defect distinguishing sensor in pipe leakage according to claim 4, it is characterised in that the electricity
Bridge shares two groups, is made up of respectively two groups of diagonal coils on the eddy current sensor.
6. detection inside and outside wall defect distinguishing sensor in pipe leakage according to claim 1, it is characterised in that the collection
Into (2) circlewise structure of popping one's head in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721075518.7U CN207196096U (en) | 2017-08-25 | 2017-08-25 | Detection inside and outside wall defect distinguishing sensor in pipe leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721075518.7U CN207196096U (en) | 2017-08-25 | 2017-08-25 | Detection inside and outside wall defect distinguishing sensor in pipe leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207196096U true CN207196096U (en) | 2018-04-06 |
Family
ID=61795281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721075518.7U Withdrawn - After Issue CN207196096U (en) | 2017-08-25 | 2017-08-25 | Detection inside and outside wall defect distinguishing sensor in pipe leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207196096U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388048A (en) * | 2017-08-25 | 2017-11-24 | 上海市特种设备监督检验技术研究院 | Detection inside and outside wall defect distinguishing sensor and identification and evaluation method in pipe leakage |
| CN110308200A (en) * | 2019-07-16 | 2019-10-08 | 南京航空航天大学 | A kind of high-speed track method of detection that the leakage field of differential type is compound with vortex |
| CN112834606A (en) * | 2021-01-07 | 2021-05-25 | 清华大学 | Method and device for identifying defects of inner wall and outer wall based on focusing magnetic flux leakage composite detection |
-
2017
- 2017-08-25 CN CN201721075518.7U patent/CN207196096U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388048A (en) * | 2017-08-25 | 2017-11-24 | 上海市特种设备监督检验技术研究院 | Detection inside and outside wall defect distinguishing sensor and identification and evaluation method in pipe leakage |
| CN107388048B (en) * | 2017-08-25 | 2023-10-20 | 上海市特种设备监督检验技术研究院 | Sensor for distinguishing defects of inner wall and outer wall of pipeline magnetic leakage inner detection and identification evaluation method |
| CN110308200A (en) * | 2019-07-16 | 2019-10-08 | 南京航空航天大学 | A kind of high-speed track method of detection that the leakage field of differential type is compound with vortex |
| CN110308200B (en) * | 2019-07-16 | 2022-11-04 | 南京航空航天大学 | Differential magnetic leakage and eddy current composite high-speed rail flaw detection method |
| CN112834606A (en) * | 2021-01-07 | 2021-05-25 | 清华大学 | Method and device for identifying defects of inner wall and outer wall based on focusing magnetic flux leakage composite detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180406 Effective date of abandoning: 20231020 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180406 Effective date of abandoning: 20231020 |