CN103423599B - Small leakage detection ball for liquid pipeline - Google Patents
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Abstract
The invention relates to a small leakage detection ball for a liquid pipeline. To the field of testing, acoustic wave measurement, and pipe system technology not otherwise provided for. The device consists of an electret microphone and a signal processing circuit thereof, an STM32 processor, an inertial navigation module, a timing unit, a magnetic field transmitting device, an SD card memory, a USB interface, a Jtag interface, a battery and a power supply conversion; the output of the electret microphone is connected with a signal processing circuit, the signal processing circuit is connected with an STM32 processor, the STM32 processor is connected with an inertial navigation module, a timing unit, a magnetic field emission device, an SD card memory, a USB interface and a Jtag interface, and a battery and power supply conversion circuit are connected with all circuits to supply power for the circuits. The invention can detect small leakage and even micro leakage and has high sensitivity.
Description
Technical field
The present invention is a kind of small leak detection ball for liquid pipeline.Relate to the test not to be covered of other class, the measurement of sound wave and pipe-line system technical field.
Technical background
Along with the development of pipeline industry, increasing of pipeline, the prolongation of pipelining distance, the growth of pipeline military service phase, and the factor such as unavoidable the aging of equipment burn into service wear and geography, Climate and Environment Variation and artificial damage, not only cause huge economic loss once leak, and the injures and deaths etc. of environmental pollution, personnel can be caused.Therefore, pipe leakage accurately detects and accurately locates improving Cemented filling managerial skills, reduces economic loss and environmental pollution, has important practical significance.
Oneself has pipelines leak detection technology and method both at home and abroad at present.The first is real time leak monitoring technology, the change of each Operational Limits of pipeline that the loss of its main monitoring pipe inner fluid medium causes or by leaking the signals such as the suction wave that produces and identifying whether pipeline leaks, simultaneously in conjunction with data analysing method to determine the position that pipe leakage occurs.Chinese invention patent application number be 99107241.3 and 200410019451.6 file disclose line leakage method based on static pressure and suction wave technology.Chinese invention patent application number be 200710097721.9 file disclose leakage monitoring method based on dynamic low-frequency technology.What it disclosed is the generation judging pipe leakage event according to the dynamic pressure signal gathered.Above patent has all done concrete introduction in its patent application document, no longer sets forth at this.
The second is non real-time detection, and it mainly relies on manually carries leak detector and carry out search type leak detection to certain area.The file of Chinese invention patent application numbers 200510020194.2 discloses a kind of portable checker of pipeline leakage.What it disclosed is according in testing pipes owing to leaking the vibration produced.The file of Chinese invention patent application numbers 200410080221.0 discloses a kind of liquid pressure conduit leakage detection method and device.The exposure pipeline that what it disclosed is is positioned over tested leaking pipe both sides according to two sensors of measuring channel internal leakage noise picks up the noise signal in pipeline.Above patent has all done concrete introduction in its patent application document, no longer sets forth at this.
Although these technology all claim the problem of the Leak testtion that can solve fluid pipeline, but because pipeline is as large-scale wire underground structure, the objective factors such as liquid property, on the way geographical environment have impact on stability and the reliability of various system greatly, and directly cause material impact to detection sensitivity and practicability.So existing real time leak monitoring technology is remarkable to gross leak amount Detection results, but cannot detect Small leak; Existing non real-time testing amount is large, is difficult to implement for buried pipeline.
Summary of the invention
The object of the invention is to invent a kind of Small leak even highly sensitive small leak detection ball for liquid pipeline of minute leakage.
This small leak detection ball for liquid pipeline is when not changing existing pipeline technological process, small leak detection ball is launched by wiper ball serving device, small leak detection ball flows together with the medium in pipeline, gathers simultaneously and preserve sound signal, Leak testtion ball movement state information stamp time tag in pipe.Finally regain from receipts ball bucket.
This small leak detection ball theory diagram as shown in Figure 1, is made up of ECM electret condenser microphone and signal processing circuit, STM32 processor, inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface and battery and Power convert.
ECM electret condenser microphone exports and connects signal processing circuit, signal processing circuit connects STM32 processor, STM32 processor connects inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface, and battery and power-switching circuit are connected with all circuit, is its power supply.
The sound signal detected is outputted to STM32 processor by ECM electret condenser microphone after signal processing circuit is to the amplification filtering of analogue signal and analog-to-digital conversion; Inertial navigation module measures the movable information of small leak detection ball, provides initial data for resolving small leak detection ball movement locus and leaking location; Timing unit provides time reference for STM32 processor; Magnetic field emitting devices outwards launches very low frequency magnetic field by phased manner, passes through so that the outer device of pipeline responds to it; SD card memory stores acoustic information, movable information, the temporal information that STM32 processor obtains; USB interface is used for communication; Jtag interface is used for debugging.
Wherein:
Signal processing circuit is made up of 3 parts, is respectively amplification circuit, eliminator and analog to digital conversion circuit.Amplification circuit as shown in Figure 2, is made up of resistance, electric capacity, amplifier 2N930.MI C is ECM electret condenser microphone, one end is connected with resistance R4, power supply, and resistance R4 connects the collector electrode of amplifier Q1, the other end is connected with resistance R1, electric capacity C1, and electric capacity C1 is connected with amplifier Q1 base stage again, the resistance R1 the other end is connected with resistance R2, electric capacity C2, resistance R2 ground connection, electric capacity C2 is connected with resistance R3, electric capacity C3, amplifier emitter, resistance R3 ground connection, electric capacity C 3 meets output, resistance R5, resistance R5 ground connection.
As shown in Figure 3, OUT in In map interlinking 5 is signal input to eliminator, contact resistance R11, resistance R11 meet electric capacity C11, electric capacity C12, resistance R12 again, and electric capacity C11 connecting resistance R13, U1A export, electric capacity C12 meets U1A and inputs negative, resistance R13, resistance R12 ground connection, and U1A inputs positive ground connection; U1A exports contact resistance R21, and resistance R21 meets electric capacity C21, electric capacity C22, resistance R22 again, and electric capacity C21 connecting resistance R23, U1B export, and electric capacity C22 meets U1B and inputs negative, resistance R23, resistance R22 ground connection, and U1B inputs positive ground connection; U1B exports contact resistance R31, and resistance R31 meets electric capacity C31, electric capacity C32, resistance R32 again, and electric capacity C31 connecting resistance R33, U2A export, and electric capacity C32 meets U2A and inputs negative, resistance R33, resistance R32 ground connection, and U2A inputs positive ground connection; U2A exports contact resistance R41, and resistance R41 meets electric capacity C41, electric capacity C42, resistance R42 again, and electric capacity C41 connecting resistance R43, U2B export, and electric capacity C42 meets U2B and inputs negative, resistance R43, resistance R42 ground connection, and U2B inputs positive ground connection; In figure, U1A, U1B and U2A, U2B are double operational AD822.
As shown in Figure 4, in Fig. 3, Out is connected IN4 with as analog-to-digital input to analog to digital conversion circuit, and IN4 is the IN+ of resistance R50 one end, another termination capacitor C51 of R50, U9, electric capacity C51 ground connection; The VDD of U10 is connected with power supply VCC, be connected GND and power supply, the REF of REF and U9 is connected; Be connected the IN-of U9 and power supply, GND connects power supply ground, VDD meets the P35 that P 34, CNV that P33, SDO that power supply VCC, SCK meet U11 meet U11 meet U11; VCC and power supply ground series capacitance C52.
Inertial navigation module model is ADIS16365 chip, is connected with the SPI1 interface of STM32 processor.
Timing unit model is the accurate crystal oscillator chip of DS3234, is connected with the SPI3 interface of STM32 processor.
SD card memory model is Jin Shidun SDHC 4GB storage card, is connected with the SDIO interface of STM32.
Magnetic field emitting devices model is CD42-T4, is connected with the P1.0 of STM32.
Its working principle is: after small leak detection ball drops into pipeline, travels forward with medium in pipe.Utilize acoustic information in ECM electret condenser microphone collection tube, utilize the movable information of inertial navigation module acquires small leak detection ball and preserve.Magnetic field emitting devices outwards launches very low frequency magnetic field by phased manner simultaneously, passes through so that the outer device of pipeline responds to it.Small leak detection ball just can obtain the sound in pipe, and can calculate small leak detection ball any time stroke according to movable information after taking out.
Advantage of the present invention shows:
(1) propose first and utilize ECM electret condenser microphone sensor tracer liquid pipeline Small leak, achieve and collect acoustic information, movable information in liquid line, small leakage sound can be recorded and provide basic data for positioning calculation;
(2) adopt acoustic information acquisition method in exclusive pipe, improve Sensitivity of leak test, can confirm existing monitoring system leakage alarm.
Structure of the present invention is simple and direct reliably, purpose of design is clear and definite, easy for operation, and maintaining is simple, is advanced, economic, practical leak detection system.The dynamics integrated state-owned mining deposits along with flourish, the country of China's pipeline industry continues to increase and the significance of pipeline operation security, and the present invention has good application prospect.
The present invention is not only applicable to long transfusion fluid pipeline Small leak and detects, and be suitable for the Leak testtion of oil field gathering and transportation pipe network, city water transfer pipe network, have great advantage in sensitivity and positioning precision, can detect the Small leak of 0.15 liter/min, positioning error is within 3 meters.There is Applicable scope comparatively widely.
Accompanying drawing explanation
Fig. 1 small leak detection ball theory diagram
Fig. 2 amplification circuit diagram
Fig. 3 eliminator figure
Fig. 4 analog to digital conversion circuit figure
Fig. 5 Small leak Cleaning Principle figure
Embodiment
Embodiment. also the present invention is further illustrated with this example, the specific embodiment of the present invention to be described.This example is an experimental prototype, it is formed as shown in Figure 1, is made up of ECM electret condenser microphone and signal processing circuit, STM32 processor, inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface and battery and Power convert.
ECM electret condenser microphone exports and connects signal processing circuit, signal processing circuit connects STM32 processor, STM32 processor connects inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface, and battery and power-switching circuit are connected with all circuit, is its power supply.
Wherein:
Signal processing circuit is made up of 3 parts, is respectively amplification circuit, eliminator and analog to digital conversion circuit.Amplification circuit as shown in Figure 2, is made up of resistance, electric capacity, amplifier 2N930.MIC is ECM electret condenser microphone, one end is connected with resistance R4, power supply, and resistance R4 connects the collector electrode of amplifier Q1, the other end is connected with resistance R1, electric capacity C1, and electric capacity C1 is connected with amplifier Q1 base stage again, the resistance R1 the other end is connected with resistance R2, electric capacity C2, resistance R2 ground connection, electric capacity C2 is connected with resistance R3, electric capacity C3, amplifier emitter, resistance R3 ground connection, electric capacity C 3 meets output, resistance R5, resistance R5 ground connection.
As shown in Figure 3, OUT in In map interlinking 5 is signal input to eliminator, contact resistance R11, resistance R11 meet electric capacity C11, electric capacity C12, resistance R12 again, and electric capacity C11 connecting resistance R13, U1A export, electric capacity C12 meets U1A and inputs negative, resistance R13, resistance R12 ground connection, and U1A inputs positive ground connection; U1A exports contact resistance R21, and resistance R21 meets electric capacity C21, electric capacity C22, resistance R22 again, and electric capacity C21 connecting resistance R23, U1B export, and electric capacity C22 meets U1B and inputs negative, resistance R23, resistance R22 ground connection, and U1B inputs positive ground connection; U1B exports contact resistance R31, and resistance R31 meets electric capacity C31, electric capacity C32, resistance R32 again, and electric capacity C31 connecting resistance R33, U2A export, and electric capacity C32 meets U2A and inputs negative, resistance R33, resistance R32 ground connection, and U2A inputs positive ground connection; U2A exports contact resistance R41, and resistance R41 meets electric capacity C41, electric capacity C42, resistance R42 again, and electric capacity C41 connecting resistance R43, U2B export, and electric capacity C42 meets U2B and inputs negative, resistance R43, resistance R42 ground connection, and U2B inputs positive ground connection; In figure, U1A, U1B and U2A, U2B are double operational AD822.
As shown in Figure 4, in Fig. 3, Out is connected IN4 with as analog-to-digital input to analog to digital conversion circuit, and IN4 is the IN+ of resistance R50 one end, another termination capacitor C51 of R50, U9, electric capacity C51 ground connection; The VDD of U10 is connected with power supply VCC, be connected GND and power supply, the REF of REF and U9 is connected; Be connected the IN-of U9 and power supply, GND connects power supply ground, VDD meets the P35 that P34, CNV that P33, SDO that power supply VCC, SCK meet U11 meet U11 meet U11; VCC and power supply ground series capacitance C52.
Inertial navigation module model is ADIS16365 chip, is connected with the SPI1 interface of STM32 processor;
Timing unit model is the accurate crystal oscillator chip of DS3234, is connected with the SPI3 interface of STM32 processor;
SD card memory model is Jin Shidun SDHC 4GB storage card, is connected with the SDIO interface of STM32;
Magnetic field emitting devices model is CD42-T4, is connected with the P1.0 of STM32.
This example is through test, and its structure is reliably simple and direct, easy for operation, and maintaining is simple, is advanced, economic, practical Leak testtion.
Claims (6)
1. a small leak detection ball for liquid pipeline, is characterized in that being made up of the ECM electret condenser microphone be arranged in aluminum alloy spherical shell, polyurethane outer and signal processing circuit, STM32 processor, inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface and battery and Power convert;
ECM electret condenser microphone exports and connects signal processing circuit, signal processing circuit connects STM32 processor, STM32 processor connects inertial navigation module, timing unit, magnetic field emitting devices, SD card memory, USB interface, Jtag interface, and battery and power-switching circuit are connected with all circuit, is its power supply;
The sound signal detected is outputted to STM32 processor by ECM electret condenser microphone after signal processing circuit is to the amplification filtering of analogue signal and analog-to-digital conversion; Inertial navigation module measures the movable information of small leak detection ball, provides initial data for resolving small leak detection ball movement locus and leaking location; Timing unit provides time reference for STM32 processor; Magnetic field emitting devices outwards launches very low frequency magnetic field by phased manner; SD card memory stores acoustic information, movable information, the temporal information that STM32 processor obtains.
2. a kind of small leak detection ball for liquid pipeline according to claim 1, it is characterized in that described signal processing circuit by the amplification circuit be connected in series successively, eliminator and analog to digital conversion circuit 3 part form.
3. a kind of small leak detection ball for liquid pipeline according to claim 2, is characterized in that described amplification circuit is made up of resistance, electric capacity, amplifier 2N930; MIC is ECM electret condenser microphone, one end is connected with resistance R4, power supply, and resistance R4 connects the collector electrode of amplifier Q1, the other end is connected with resistance R1, electric capacity C1, and electric capacity C1 is connected with amplifier Q1 base stage again, the resistance R1 the other end is connected with resistance R2, electric capacity C2, resistance R2 ground connection, C2 is connected with resistance R3, electric capacity C3, amplifier emitter, resistance R3 ground connection, electric capacity C3 meets output, resistance R5, resistance R5 ground connection.
4. a kind of small leak detection ball for liquid pipeline according to claim 2, it is characterized in that described eliminator is: In meets OUT in amplification circuit, for signal input, contact resistance R11, resistance R11 meets electric capacity C11, electric capacity C12, resistance R12 again, and electric capacity C11 connecting resistance R13, U1A export, and electric capacity C12 meets U1A and inputs negative, resistance R13, resistance R12 ground connection, U1A inputs positive ground connection; U1A exports contact resistance R21, and resistance R21 meets electric capacity C21, electric capacity C22, resistance R22 again, and electric capacity C21 connecting resistance R23, U1B export, and electric capacity C22 meets U1B and inputs negative, resistance R23, resistance R22 ground connection, and U1B inputs positive ground connection; U1B exports contact resistance R31, and resistance R31 meets electric capacity C31, electric capacity C32, resistance R32 again, and electric capacity C31 connecting resistance R33, U2A export, and electric capacity C32 meets U2A and inputs negative, resistance R33, resistance R32 ground connection, and U2A inputs positive ground connection; U2A exports contact resistance R41, and resistance R41 meets electric capacity C41, electric capacity C42, resistance R42 again, and electric capacity C41 connecting resistance R43, U2B export, and electric capacity C42 meets U2B and inputs negative, resistance R43, resistance R42 ground connection, and U2B inputs positive ground connection; Wherein U1A, U1B and U2A, U2B are double operational AD822.
5. a kind of small leak detection ball for liquid pipeline according to claim 2, it is characterized in that analog-digital conversion circuit as described is: in eliminator, Out is connected IN4 with as analog-to-digital input, IN4 is the IN+ of resistance R50 one end, another termination capacitor C51 of resistance R50, U9, electric capacity C51 ground connection; The VDD of U10 is connected with power supply VCC, be connected GND and power supply, the REF of REF and U9 is connected; Be connected the IN-of U9 and power supply, GND connects power supply ground, VDD meets the P35 that P34, CNV that P33, SDO that power supply VCC, SCK meet U11 meet U11 meet U11; VCC and power supply ground series capacitance C52.
6. a kind of small leak detection ball for liquid pipeline according to claim 2, is characterized in that described inertial navigation module model is ADIS16365 chip, is connected with the SPI1 interface of STM32 processor;
Described timing unit model is the accurate crystal oscillator chip of DS3234, is connected with the SPI3 interface of STM32 processor;
Described SD card memory model is Jin Shidun SDHC 4GB storage card, is connected with the SDIO interface of STM32;
Described magnetic field emitting devices model is CD42-T4, is connected with the P1.0 of STM32.
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| CN105805563B (en) * | 2016-05-10 | 2018-03-27 | 广州丰谱信息技术有限公司 | Based on the supersonic detection device and method with road spy pipe leakage and blocking |
| CN106322126A (en) * | 2016-11-17 | 2017-01-11 | 西华大学 | Liquid pipeline transportation chained floating ball leakage detection system |
| CN108843978A (en) * | 2018-07-28 | 2018-11-20 | 瑞纳智能设备股份有限公司 | A kind of utilidor leak detecting device |
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|---|---|---|---|---|
| US3848458A (en) * | 1971-12-28 | 1974-11-19 | Tokico Ltd | System for detecting abnormalities in pipelines |
| WO2001070422A1 (en) * | 2000-03-22 | 2001-09-27 | Progenitive Services Limited | Pipeline pigging device for the non-destructive inspection of the fluid environment in a pipeline |
| CN1828123A (en) * | 2006-04-17 | 2006-09-06 | 姬文超 | In-service pipeline corrosion and leakage safety monitoring and early warning system and control method thereof |
| CN101033826A (en) * | 2007-04-28 | 2007-09-12 | 陆国良 | Pipe leakage detecting instrument, detecting device and detecting method based on dynamic low-frequency technology |
| CN202733454U (en) * | 2012-05-15 | 2013-02-13 | 中国石油天然气股份有限公司 | Small leakage detection ball for liquid pipeline |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3848458A (en) * | 1971-12-28 | 1974-11-19 | Tokico Ltd | System for detecting abnormalities in pipelines |
| WO2001070422A1 (en) * | 2000-03-22 | 2001-09-27 | Progenitive Services Limited | Pipeline pigging device for the non-destructive inspection of the fluid environment in a pipeline |
| CN1828123A (en) * | 2006-04-17 | 2006-09-06 | 姬文超 | In-service pipeline corrosion and leakage safety monitoring and early warning system and control method thereof |
| CN101033826A (en) * | 2007-04-28 | 2007-09-12 | 陆国良 | Pipe leakage detecting instrument, detecting device and detecting method based on dynamic low-frequency technology |
| CN202733454U (en) * | 2012-05-15 | 2013-02-13 | 中国石油天然气股份有限公司 | Small leakage detection ball for liquid pipeline |
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Effective date of registration: 20211117 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PetroChina Company Limited |