CN103499022B - A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default - Google Patents
A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default Download PDFInfo
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- CN103499022B CN103499022B CN201310460762.5A CN201310460762A CN103499022B CN 103499022 B CN103499022 B CN 103499022B CN 201310460762 A CN201310460762 A CN 201310460762A CN 103499022 B CN103499022 B CN 103499022B
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Abstract
A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default, the input end of filtering and amplifying circuit is connected with the magnetic test coil of detection probe, integrated signal occurs and the signal generation output terminal for the treatment of circuit is connected with the drive coil of detection probe, integrated signal occurs and the signal transacting input end for the treatment of circuit is connected with the output terminal of filtering and amplifying circuit, data storage circuitry occurs with integrated signal and the signal transacting output terminal for the treatment of circuit is connected, filtering and amplifying circuit, integrated signal occurs and treatment circuit and supplying cell group are arranged in shielding box, under the effect of the ac-excited electromagnetic field that oil and gas pipes sends at drive coil, eddy effect can be produced in tube wall, the electromagnetic induction signal that magnetic test coil is received at inner surface of pipeline corrosion default position is different from other position, record and compare the electromagnetic induction signal that pipeline different parts magnetic test coil receives, realize the differentiation of pipeline surfaces externally and internally defect, there is volume little, accuracy of detection advantages of higher.
Description
Technical field
The present invention relates to oil and gas pipes technical field of electromagnetic measurement, particularly a kind of sensor distinguishing pipeline surfaces externally and internally corrosion default.
Background technology
Oil and gas pipes is as the transmission facilities of oil and natural gas, by the corrosive attack of carrying oil gas in external environment and pipeline, all may there is corrosion default in pipeline surfaces externally and internally, oil-gas pipeline safety is on the hazard, needs to carry out defects detection in time and determine to take corresponding pipeline maintenance measure according to testing result.Conventional oil and gas pipes defect inspection method adopts detection method in oil and gas pipes defect and magnetic leakage, and detecting device moves with oil gas transmission medium in oil and gas pipes, detects and stores pipeline defect information.Magnetic Flux Leakage Inspecting sensor effectively can detect the corrosion default that duct wall exists, but can not distinguish defect is at the inside surface of pipeline or outside surface, and the maintenance policy adopted the surfaces externally and internally defect of pipeline is different, therefore, being necessary to distinguish oil and gas pipes defect is at the inside surface of pipeline or outside surface.
Chinese patent application 201110210589.4 discloses a kind of pipeline surfaces externally and internally defect detecting device based on far-field eddy, this device uses magnetoresistance device, the far-field eddy signal of reflection pipeline surfaces externally and internally defect is received in far-field region, the electric signal that data processing module exports for magnetoresistance device, pumping signal is provided to ask phase differential as with reference to signal using stimulating module, obtain the data reflecting pipeline surfaces externally and internally defect, this patented method effectively can detect the defect of pipeline surfaces externally and internally, but can not distinguish defect is at the inside surface of pipeline or outside surface.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of sensor distinguishing pipeline surfaces externally and internally corrosion default, fast response time, accuracy of detection are high, and can distinguish oil and gas pipes defect defect that internal detector detects is at inner surface of pipeline or outside surface.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default, comprise detection probe 10, detection probe 10 comprises drive coil and magnetic test coil, drive coil is used for sending ac-excited electromagnetic field, the electromagnetic signal that magnetic test coil induces for detecting tested tube wall, the input end of filtering and amplifying circuit 20 is connected by shielded cable with the magnetic test coil of detection probe 10, electric signal for exporting detection probe amplifies and filtering, integrated signal occurs and the signal generation output terminal for the treatment of circuit 30 is connected with the drive coil of detection probe 10, simple alternating current pumping signal is sent for the drive coil to detection probe 10, integrated signal occurs and the signal transacting input end for the treatment of circuit 30 is connected with the output terminal of filtering and amplifying circuit 20, amplify and filtered electric signal for receiving process, data storage circuitry 40 occurs with integrated signal and the signal transacting output terminal for the treatment of circuit 30 is connected, the detection data completed in order to stores processor, power to sensor circuit by supplying cell group 50, filtering and amplifying circuit 20, integrated signal occurs and treatment circuit 30 and supplying cell group 50 are arranged in same shielding box 60.
Described integrated signal occurs and treatment circuit 30 adopts MAX1452 integrated signal process chip, its signal processing method is, the sine wave exciting signal flowing to detection probe 10 drive coil is made scale operation with the electric signal being received in filtering and amplifying circuit 20, obtain the DC signal of approximately constant, the fluctuation situation of this DC signal value reflects probe and the situation of change of inner surface of pipeline distance, namely whether has the corrosion default of inner surface of pipeline.
Described data storage circuitry 40 uses Nand Flash memorizer to carry out data storage.
The sensor of the differentiation pipeline surfaces externally and internally corrosion default designed by the present invention has plurality of advantages: owing to adopting high performance integrated signal process chip, sensor of the present invention is made to have structure and mounting arrangements is simple, volume is little, fast response time, accuracy of detection advantages of higher.
Structure and mounting arrangements is simple, volume is little, to be convenient to be arranged in various pipes defect on checkout equipment, fast response time, accuracy of detection is high, be applicable under the motion conditions of 0m/s ~ 10m/s, carry out detection to pipeline surfaces externally and internally corrosion default to distinguish, and can detect that to be greater than 5mm × 5mm × 1mm(long × wide × dark) inside corrosion defect, and the defect that can be greater than 2mm with residual thickness in pipeline outer wall defect is effectively distinguished.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is detection probe wiring schematic diagram of the present invention.
Fig. 3 is the filtering and amplifying circuit schematic diagram of detection signal of the present invention.
Fig. 4 is that integrated signal of the present invention occurs and treatment circuit schematic diagram.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of sensor distinguishing pipeline surfaces externally and internally corrosion default, comprise: detection probe 10, filtering and amplifying circuit 20, integrated signal occur and treatment circuit 30 and data storage circuitry 40, detection probe 10 comprises two groups of coils, be respectively drive coil and inductive coil, as shown in Figure 2, drive coil occurs with integrated signal and treatment circuit 30 connects, for generation of space alternating electromagnetic field; Inductive coil connects with filtering and amplifying circuit 20, for detecting the electromagnetic signal of tested pipeline under eddy effect, and induces electric signal, and in the present embodiment, detection probe adopts the hollow enamel wire coil of 50 circle of diameter 45mm, wire diameter 0.12mm.
Result is shielded better for reaching, detection probe 10 occurs with filtering and amplifying circuit 20 and integrated signal and is connected by shielding stube cable between treatment circuit 30, shielding stube cable adopts 2 core iron silk screen shielded cables, cable insulation layer material is tygon, core line diameter 0.12 millimeter, screen layer diameter two millimeters, unit length wave impedance is about 70.887 ohm, long 1 meter of cable.
Filtering and amplifying circuit 20 is connected to detection probe 10 and integrated signal occurs and between treatment circuit 30, carry out amplification filtering process for the electric signal induced inductive coil in detection probe 10.As shown in Figure 3, in the present embodiment, filtering and amplifying circuit adopts amplifier AD620 to form filtering and amplifying circuit.The enlargement factor of this circuit can change by regulating slide rheostat Res1, and when Res1 is 25 kilohms, enlargement factor is 3 times.
As shown in Figure 4, the input end of integrated signal generation and treatment circuit 30 is connected with filtering and amplifying circuit 20, for receiving the signal after amplification filtering and carrying out signal transacting; Integrated signal occurs and an output terminals A for the treatment of circuit 30 is connected with the drive coil of monitoring probe 10, exports sinusoidal excitation signal, for producing external electromagnetic field by drive coil; Another output terminal B connection data memory circuit 40, for storing the signal after process.Integrated signal occurs and the signal processing method for the treatment of circuit 30 is: the electric signal of the near sinusoidal sine wave exciting signal of output terminals A and input end received makes scale operation, sine wave exciting signal due to output terminals A is constant sinusoidal signal, and the fluctuation situation of the DC signal value obtained reflects the change of detection signal.In the present embodiment, integrated signal occurs and treatment circuit 30 is made up of MAX1452 integrated signal process chip and resistance and capacity cell, the frequency of the output terminals A generation sinusoidal signal of MAX1452 is determined by the value of electric capacity C21, the amplitude of output drive is determined by the value of resistance R1, select C21=7n farad, R1=10k ohm, then the frequency obtaining sinusoidal excitation signal is 5kHz, and amplitude is 5 volts.This signal flows to drive coil and produces external electromagnetic field, warp and tested pipeline effect, and magnetic test coil receives electromagnetic induction signal, then through operation amplifier, inputs to the input end of integrated signal generation and treatment circuit 30.
The input end of data storage circuitry 40 occurs with integrated signal and the output terminal for the treatment of circuit 30 is connected, for storing the detection signal after process.First data storage circuitry converts simulating signal to digital signal by analog-to-digital conversion module, then by writing data into memory.In an embodiment, STM32 microcontroller and Nand Flash memorizer is used to set up data storage circuitry.
In an embodiment, the battery that supplying cell group 50 adopts is chargeable lithium cell group.Filtering and amplifying circuit 20, integrated signal occur and treatment circuit 30, data storage circuitry 40 are arranged in same shielding box 60.Supplying cell group 50 is filtering and amplifying circuit 20 in shielding box 60, integrated signal occurs and treatment circuit 30 and data storage circuitry 40 are powered.
Principle of work of the present invention is: the oil and gas pipes adopting the conductor materials such as iron and steel, under the effect of the ac-excited electromagnetic field sent at drive coil, eddy effect can be produced in tube wall, the electromagnetic induction signal that magnetic test coil is received at inner surface of pipeline corrosion default position is different from other position, record and compare the electromagnetic induction signal that pipeline different parts magnetic test coil receives, the differentiation of pipeline surfaces externally and internally defect can be realized.
Utilize electromagnetic induction principle and eddy effect thereof designed by the present invention carry out the sensor of detection zone subtube surfaces externally and internally corrosion default, its apparatus structure and mounting arrangements simple, volume is little, to be convenient to be arranged in various pipes defect on checkout equipment, fast response time, accuracy of detection is high, be applicable under the motion conditions of 0m/s ~ 10m/s, carry out detection to pipeline surfaces externally and internally corrosion default to distinguish, can detect that inner surface of pipeline is greater than 5mm × 5mm × 1mm(long × wide × dark) corrosion default, and the defect that can be greater than 2mm with pipeline outer wall defect residual wall thickness is effectively distinguished.
Claims (2)
1. distinguish the sensor of pipeline surfaces externally and internally corrosion default for one kind, comprise detection probe (10), it is characterized in that: detection probe (10) comprises drive coil and magnetic test coil, drive coil is used for sending ac-excited electromagnetic field, the electromagnetic signal that magnetic test coil induces for detecting tested tube wall, the input end of filtering and amplifying circuit (20) is connected by shielded cable with the magnetic test coil of detection probe (10), electric signal for exporting detection probe amplifies and filtering, integrated signal occurs and the signal generation output terminal for the treatment of circuit (30) is connected with the drive coil of detection probe (10), simple alternating current pumping signal is sent for the drive coil to detection probe (10), integrated signal occurs and the signal transacting input end for the treatment of circuit (30) is connected with the output terminal of filtering and amplifying circuit (20), amplify and filtered electric signal for receiving process, data storage circuitry (40) occurs with integrated signal and the signal transacting output terminal for the treatment of circuit (30) is connected, the detection data completed in order to stores processor, power to sensor circuit by supplying cell group (50), filtering and amplifying circuit (20), integrated signal occurs and treatment circuit (30) and supplying cell group (50) are arranged in same shielding box (60),
Described integrated signal occurs and treatment circuit (30) adopts MAX1452 integrated signal process chip, its signal processing method is, the simple alternating current pumping signal flowing to detection probe (10) drive coil is made scale operation with the electric signal being received in filtering and amplifying circuit (20), obtain the DC signal of approximately constant, the fluctuation situation of the value of this DC signal reflects probe and the situation of change of inner surface of pipeline distance, namely whether has the corrosion default of inner surface of pipeline.
2. a kind of sensor distinguishing pipeline surfaces externally and internally corrosion default according to claim 1, is characterized in that: described data storage circuitry (40) uses Nand Flash memorizer to carry out data storage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310460762.5A CN103499022B (en) | 2013-09-30 | 2013-09-30 | A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default |
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| CN201310460762.5A CN103499022B (en) | 2013-09-30 | 2013-09-30 | A kind of sensor distinguishing pipeline surfaces externally and internally corrosion default |
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| CN103499022B true CN103499022B (en) | 2015-08-19 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290558B (en) * | 2016-07-28 | 2019-06-07 | 南昌航空大学 | A kind of inner and outer walls of pipeline defect detecting device and detection method |
| CN106501355A (en) * | 2016-12-14 | 2017-03-15 | 中国计量大学 | A kind of metallic conduit defect detecting device based on far-field eddy |
| FR3062916B1 (en) * | 2017-02-10 | 2019-04-05 | Areva Np | TUBE INSPECTION ASSEMBLY WITH A FOUCAULT CURRENT PROBE AND METHOD THEREOF |
| CN109491306B (en) * | 2017-09-11 | 2024-01-23 | 清华大学 | Dynamic magnetic detection probe and electromagnetic array control method |
| CN108181323A (en) * | 2017-12-15 | 2018-06-19 | 河南飞优驰网络科技有限公司 | Integrated circuit plate fault detection method and system based on electromagnetic signature |
| CN110118308B (en) * | 2019-04-24 | 2021-03-09 | 中国石油天然气股份有限公司 | Pipeline corrosion condition detection device and method |
| US11300498B2 (en) | 2019-06-26 | 2022-04-12 | Micross Advanced Interconnect Technology Llc | Corrosion sensor and method and computerized system for using the same |
| CN111060588B (en) * | 2020-01-06 | 2022-07-22 | 南京航空航天大学 | Surface and buried depth defect classification method based on pulse eddy current technology |
| CN111336410A (en) * | 2020-04-20 | 2020-06-26 | 西南石油大学 | Real-time online detection device and method for erosion of magnetic conduction pipe column |
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| CN101865883A (en) * | 2010-06-21 | 2010-10-20 | 南京航空航天大学 | Integration detection system of pulse eddy current stress cracking and method thereof |
| CN101949683A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Eddy current displacement detection method |
| CN102313777A (en) * | 2011-07-26 | 2012-01-11 | 电子科技大学 | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current testing |
| CN103257182A (en) * | 2013-06-07 | 2013-08-21 | 电子科技大学 | Pulse vortexing defect quantitative detection method and detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012026806A (en) * | 2010-07-21 | 2012-02-09 | Toshiba Corp | Remote field eddy current flow detector, and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865883A (en) * | 2010-06-21 | 2010-10-20 | 南京航空航天大学 | Integration detection system of pulse eddy current stress cracking and method thereof |
| CN101949683A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Eddy current displacement detection method |
| CN102313777A (en) * | 2011-07-26 | 2012-01-11 | 电子科技大学 | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current testing |
| CN103257182A (en) * | 2013-06-07 | 2013-08-21 | 电子科技大学 | Pulse vortexing defect quantitative detection method and detection system |
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