CN201965115U - Metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system - Google Patents
Metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system Download PDFInfo
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- CN201965115U CN201965115U CN2011200541042U CN201120054104U CN201965115U CN 201965115 U CN201965115 U CN 201965115U CN 2011200541042 U CN2011200541042 U CN 2011200541042U CN 201120054104 U CN201120054104 U CN 201120054104U CN 201965115 U CN201965115 U CN 201965115U
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Abstract
The utility model relates to a metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system relating to the technical field of magnetic variable measurement, thickness linear dimension measurement and piping systems. The system comprises a plurality of sensors, a multi-channel analogue switch, an A/D (analog-to-digital converter), a MCU (micro control unit) and a RS-485; outputs of the plurality of sensors are connected with inputs of the multi-channel analogue switch; outputs of the multi-channel analogue switch are connected with inputs of the A/D; outputs of the A/D are connected with inputs of the MCU; outputs of the MCU are connected with the RS-485; the plurality of sensors transmits magnetic leakage field signals on a three-dimensional space vector to the A/D by a multi-channel analogue switch in a serial mode; after the magnetic leakage field signals are converted into digital signals, the digital signals are transmitted to the MCU of a master control board for data processing and storage, and the results are sent out by the RS-485. The system is simple and has high reliability and good maintainability.
Description
Technical field
The utility model is the three-dimensional magnetic leakage signal acquisition system of a kind of metallic conduit corrosion default total digitalization, relates to measurement and the piping system technical field of measuring magnetic variable, thickness linear dimension.
Background technology
At present, it is that metallic conduit is carried out the economy that detects at the labour corrosion default and effective means that magnetic leakage signal detects, and is widely used in Corrosion of Pipeline defects detection such as oil, rock gas.But current domestic Magnetic Flux Leakage Inspecting all is based on the detection technique of one dimension, and all is to adopt the analog signal transmission mode, and intrinsic limitation is arranged.Three-dimensional Magnetic Flux Leakage Inspecting technology has remarkable advantages than one dimension Magnetic Flux Leakage Inspecting technology, can more fully reflect the pipeline running status, in addition can detect one dimension Magnetic Flux Leakage Inspecting technology the defective that can't detect.In three-dimensional magnetic leakage signal detection technique, because port number is numerous,, will inevitably bring a large amount of connecting lines if adopt traditional analog signal transmission mode, make system too fat to move huge, reliability and maintainability all reduces greatly.
On March 4th, 2007, the CN1928543A of bulletin disclosed a kind of wire rope lossless detection method and device based on Hall sensor array, and it is made up of permanent magnet excitation mechanism, Hall sensor array, cmos analog switch, photoelectric encoder, sensor probe, data collection processor and computing machine.The system of " pipeline under the ocean defect and magnetic leakage detection signal is gathered and Processing System Design " that " computer measurement and control " the 12nd volume the 2nd periodical is stepped on partly is made up of sensor array, multiway analog switch, A/D, digital signal processing.Though this two technology can be measured the defective of wire rope or pipeline under the ocean, its signal that records is an one dimension, that is to say, can not measure comprehensive defective, still has very big limitation.
The utility model content
The purpose of this utility model is that a kind of system of design is comparatively simple, reliability is high and the three-dimensional magnetic leakage signal acquisition system of maintainable good metallic conduit corrosion default total digitalization.
In order to overcome the deficiency of one dimension magnetic leakage signal detection technique in the defect of pipeline context of detection, the utility model proposes a kind of three-dimensional magnetic leakage signal detection technique scheme, can obtain more information than one dimension Magnetic Flux Leakage Inspecting technology about the defect of pipeline aspect.In this scheme, in order to reduce the quantity of connecting line, the enhanced system reliability and maintainability, this three-dimensional magnetic leakage signal detection technique has adopted totally digitilized side signal transmission case.
The technical scheme in the invention for solving the technical problem is: probe module converts the stray field signal on the three dimensions vector that collects to digital signal on the spot, and passes to processing and the storage that master control borad carries out data by serial communication mode at a high speed.When detecting end, PC reads in the computing machine by the testing result that usb bus will be stored on the master control borad, carries out data analysis.
Formation of the present utility model is seen Fig. 1, and it is made up of a plurality of sensors, multiway analog switch, A/D, MCU, RS-485.A plurality of sensor outputs connect the input of multiway analog switch, and multiway analog switch output connects the input of A/D, and the output of A/D connects the input of MCU, and the output of MCU meets RS-485.
A plurality of sensors pass to A/D through multiway analog switch with serial mode with the stray field signal on the three dimensions vector that collects, convert digital signal to after, pass to processing and the storage that master control borad MCU carries out data by SPI, the result is sent by RS-485.
Electrical schematic diagram of the present utility model is seen Fig. 2, and 1 pin of probe module U1-U12 meets the 1 pin Vcc of A/D U15 and the 8 pin Vcc of RS-485 level translator U16 after linking to each other; Ground connection after 2 pin of probe module U1-U12 link to each other; 3 pin of probe module U1-U12 connect 19 pin, 20 pin, 21 pin, 22 pin, 23 pin, 24 pin, 25 pin, 26 pin, 11 pin, 10 pin, 9 pin, 8 pin of multiway analog switch U13 respectively; 1 pin of multiway analog switch U13 meets the 1 pin Vcc of A/D U15,18 pin of multiway analog switch U13,14 pin, 15 pin, 16 pin, 17 pin connect 12 pin, 13 pin, 14 pin, 15 pin, 16 pin of MCU U14 respectively, 12 pin of multiway analog switch U13 and 27 pin ground connection, 1 pin of MCU U14,2 pin, 4 pin ground connection; 6 pin of A/D U15,5 pin, 4 pin connect 29 pin, 31 pin, 32 pin of MCU U14 respectively, 2 pin ground connection, and 3 pin connect 28 pin of multiway analog switch U13; 4 pin, 3 of RS-485 level translator U16,2 pin, 1 pin connect 28 pin, 26 pin, 27 pin of MCU U14,5 pin ground connection respectively.
Wherein:
U1-U12 is a probe module 815;
U13 is a multiway analog switch, selects ADG702 for use;
U14 is MCU, selects C8051F903 for use;
U15 is that A/D selects AD7476 for use;
U16 is the RS-485 level translator, selects ADM4583 for use.
System of the present utility model is too fat to move huge unlike prior art, and is comparatively simple, and the reliability height is maintainable good.
Description of drawings
The three-dimensional magnetic leakage signal acquisition system of Fig. 1 theory diagram
The three-dimensional magnetic leakage signal acquisition system of Fig. 2 electrical schematic diagram
Embodiment
Embodiment. the formation of this example is seen Fig. 1, and it is made up of 12 sensors, multiway analog switch, A/D, MCU, RS-485.12 sensor outputs connect the input of multiway analog switch, and multiway analog switch output connects the input of A/D, and the output of A/D connects the input of MCU, and the output of MCU meets RS-485.
This routine electrical schematic diagram is seen Fig. 2, and 1 pin of probe module U1-U12 meets the 1 pin Vcc of A/D U15 and the 8 pin Vcc of RS-485 level translator U16 after linking to each other; Ground connection after 2 pin of probe module U1-U12 link to each other; 3 pin of probe module U1-U12 connect 19 pin, 20 pin, 21 pin, 22 pin, 23 pin, 24 pin, 25 pin, 26 pin, 11 pin, 10 pin, 9 pin, 8 pin of multiway analog switch U13 respectively; 1 pin of multiway analog switch U13 meets the 1 pin Vcc of A/D U15,18 pin of multiway analog switch U13,14 pin, 15 pin, 16 pin, 17 pin connect 12 pin, 13 pin, 14 pin, 15 pin, 16 pin of MCU U14 respectively, 12 pin of multiway analog switch U13 and 27 pin ground connection, 1 pin of MCU U14,2 pin, 4 pin ground connection; 6 pin of A/D U15,5 pin, 4 pin connect 29 pin, 31 pin, 32 pin of MCU U14 respectively, 2 pin ground connection, and 3 pin connect 28 pin of multiway analog switch U13; 4 pin, 3 of RS-485 level translator U16,2 pin, 1 pin connect 28 pin, 26 pin, 27 pin of MCU U14,5 pin ground connection respectively.
Wherein:
Probe module U1-U12 selects 815;
Multiway analog switch U13 selects ADG702 for use;
A/D U15 selects AD7476 for use
MCU U14 selects C8051F903 for use;
RS-485 level translator U16 selects ADM4583 for use.
In this example, have 12 Hall elements in each probe module, be divided into 4 groups, 3 every group, be respectively applied for detect certain position radially, the stray field signal on the three dimensions vector of circumferential and axial.The signal of No. 12 sensors is after through a multiway analog switch, and the A/D sampling A that enters 1 12 is successively sampled, and sampled result is obtained by spi bus by microcontroller.Microcontroller with the RS-485 bus of sampled result via high speed, sends to master control borad more successively.
4 connecting lines are arranged: the A of+5V power lead, ground wire and RS-485, B signal wire between each probe module and the master control borad.If adopt traditional analog signal transmission mode then need at least 13 connecting lines.
In Fig. 2, each probe module is all independent, carry out communication with master control borad concurrently, to improve the signal sampling and the data rate of system.RS-485 communication speed between probe module and the master control borad is 6.125Mbps.The sampled data that master control borad transmits each probe module deposits NAND FLASH storer in, after sampling process finishes, sends to computing machine by usb bus again, carries out the defect analysis of metal specimen for data analysis software.
This example is through test, and is comparatively simple, and the reliability height is maintainable good.
Claims (7)
1. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default total digitalization is characterized in that it is made up of a plurality of sensors, multiway analog switch, A/D, MCU, RS-485; A plurality of sensor outputs connect the input of multiway analog switch, and multiway analog switch output connects the input of A/D, and the output of A/D connects the input of MCU, and the output of MCU meets RS-485;
A plurality of sensors pass to A/D through multiway analog switch with serial mode with the stray field signal on the three dimensions vector that collects, convert digital signal to after, pass to processing and the storage that master control borad MCU carries out data by SPI, the result is sent by RS-485.
2. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default total digitalization according to claim 1, it is characterized in that its electric principle is: 1 pin of probe module U1-U12 meets the 1 pin Vcc of A/D U15 and the 8 pin Vcc of RS-485 level translator U16 after linking to each other; Ground connection after 2 pin of probe module U1-U12 link to each other; 3 pin of probe module U1-U12 connect 19 pin, 20 pin, 21 pin, 22 pin, 23 pin, 24 pin, 25 pin, 26 pin, 11 pin, 10 pin, 9 pin, 8 pin of multiway analog switch U13 respectively; 1 pin of multiway analog switch U13 meets the 1 pin Vcc of A/D U15,18 pin of multiway analog switch U13,14 pin, 15 pin, 16 pin, 17 pin connect 12 pin, 13 pin, 14 pin, 15 pin, 16 pin of MCU U14 respectively, 12 pin of multiway analog switch U13 and 27 pin ground connection, 1 pin of MCU U14,2 pin, 4 pin ground connection; 6 pin of A/D U15,5 pin, 4 pin connect 29 pin, 31 pin, 32 pin of MCU U14 respectively, 2 pin ground connection, and 3 pin connect 28 pin of multiway analog switch U13; 4 pin, 3 of RS-485 level translator U16,2 pin, 1 pin connect 28 pin, 26 pin, 27 pin of MCU U14,5 pin ground connection respectively.
3. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default according to claim 2 total digitalization is characterized in that described probe module selects 815 for use.
4. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default according to claim 2 total digitalization is characterized in that described multiway analog switch selects ADG702 for use.
5. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default total digitalization according to claim 2 is characterized in that described MCU selects C8051F903 for use.
6. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default total digitalization according to claim 2 is characterized in that described A/D selects AD7476 for use.
7. the three-dimensional magnetic leakage signal acquisition system of metallic conduit corrosion default according to claim 2 total digitalization is characterized in that described RS-485 level translator selects ADM4583 for use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200541042U CN201965115U (en) | 2011-03-03 | 2011-03-03 | Metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system |
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| CN2011200541042U CN201965115U (en) | 2011-03-03 | 2011-03-03 | Metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590765A (en) * | 2012-02-21 | 2012-07-18 | 大连理工大学 | Full-tensor magnetic gradiometer |
| CN102590327A (en) * | 2012-01-16 | 2012-07-18 | 南昌航空大学 | Multi-channel magnetic flaw detector |
| CN102621582A (en) * | 2012-03-27 | 2012-08-01 | 淄博威特电气有限公司 | Method for detecting positions of underground metal pipelines by aid of space vector method and device |
| CN102654479A (en) * | 2011-03-03 | 2012-09-05 | 中国石油天然气集团公司 | Fully-digitalized three-dimensional magnetic flux leakage signal acquisition system for metallic pipeline corrosion defect |
| CN102841133A (en) * | 2012-09-26 | 2012-12-26 | 中国船舶重工集团公司第七一〇研究所 | Lossless real-time detecting method and system for magnetic conductive material |
| CN105425684A (en) * | 2015-12-24 | 2016-03-23 | 华中科技大学 | Data acquisition method and device based on FPGA control |
| CN109374726A (en) * | 2018-10-18 | 2019-02-22 | 浙江大学 | Rust of Rebar in Concrete dynamic nondestructive monitoring sensor and system based on magnetic field |
-
2011
- 2011-03-03 CN CN2011200541042U patent/CN201965115U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654479A (en) * | 2011-03-03 | 2012-09-05 | 中国石油天然气集团公司 | Fully-digitalized three-dimensional magnetic flux leakage signal acquisition system for metallic pipeline corrosion defect |
| CN102654479B (en) * | 2011-03-03 | 2016-05-11 | 中国石油天然气集团公司 | Metal pipeline corrosion defect full-digitalization three-dimensional magnetic leakage signal acquisition system |
| CN102590327A (en) * | 2012-01-16 | 2012-07-18 | 南昌航空大学 | Multi-channel magnetic flaw detector |
| CN102590765A (en) * | 2012-02-21 | 2012-07-18 | 大连理工大学 | Full-tensor magnetic gradiometer |
| CN102621582A (en) * | 2012-03-27 | 2012-08-01 | 淄博威特电气有限公司 | Method for detecting positions of underground metal pipelines by aid of space vector method and device |
| CN102841133A (en) * | 2012-09-26 | 2012-12-26 | 中国船舶重工集团公司第七一〇研究所 | Lossless real-time detecting method and system for magnetic conductive material |
| CN105425684A (en) * | 2015-12-24 | 2016-03-23 | 华中科技大学 | Data acquisition method and device based on FPGA control |
| CN105425684B (en) * | 2015-12-24 | 2017-10-31 | 华中科技大学 | A kind of collecting method and device controlled based on FPGA |
| CN109374726A (en) * | 2018-10-18 | 2019-02-22 | 浙江大学 | Rust of Rebar in Concrete dynamic nondestructive monitoring sensor and system based on magnetic field |
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Granted publication date: 20110907 |
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| CX01 | Expiry of patent term |