CN102565195A - Connection-free type acoustic emission detector - Google Patents
Connection-free type acoustic emission detector Download PDFInfo
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- CN102565195A CN102565195A CN2012100067500A CN201210006750A CN102565195A CN 102565195 A CN102565195 A CN 102565195A CN 2012100067500 A CN2012100067500 A CN 2012100067500A CN 201210006750 A CN201210006750 A CN 201210006750A CN 102565195 A CN102565195 A CN 102565195A
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- storage tank
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Abstract
The invention relates to a connection-free type acoustic emission detector. In a ferromagnetic shell with good magnetic permeability, an acoustic emission sensor, a signal collecting and processing unit, a power supply unit and a transmission unit are sequentially connected, external connection is not needed, and the problems of signal interference, equipment failure and the like due to external connection are solved. Under the double actions including the elastic force of a spring and the attraction of magnet, the sensor is tightly contacted with a wallboard of an oil storage tank to achieve a good coupling effect. An adjustable shelf bracket can overcome the influence of the gravity of the detector and support the detector to be stabilized at the set height, all detectors can be positioned in the same plane, and the position error of the corrosion leakage detection of the acoustic emission detector for the tank bottom of the oil storage tank is reduced.
Description
Technical field
The present invention relates to a kind of the cannot-harm-detection device that is used to detect vertical steel storage tank bottom corrosion seepage situation, especially a kind of acoustic emission detector of exempting from line-connection type.
Background technology
The base plate of vertical steel storage tank directly contacts with storage medium with tank base, and the installation site is hidden, so the corrosion condition of storage tank base plate is difficult for being detected, difficulty and the workload of implementing detection are also relatively large.Tradition storage tank base plate lossless detection method has infiltration detection, magnetic detection, Magnetic Flux Leakage Inspecting, EDDY CURRENT, ultrasound examination etc., and these methods all need be soared, cleaned the storage, and can't under the oil storage state, the corrosion situation to storage tank detect.Acoustic emission can overcome the shortcoming of traditional storage tank lossless detection method; A series of complicated processes such as it need not pass through and soar, cleaning; Just can realize the corrosion situation of detection storage tank real-time; Be a kind of online, efficient and economic lossless detection method, have boundless application prospect.
At present, the acoustic emission instrument is divided into two kinds of fundamental types substantially, i.e. single channel acoustic emission detector and multiple channel acousto emissive source positioning analysis system
[1]The single channel acoustic emission detector is made up of sensor and signal acquisition module, and signal acquisition module comprises prime amplifier, wave filter, main amplifier and A/D converter etc.Be fixed on sensor on the storage tank wallboard with the magnetic deck during detection, couple together sensor and acquisition module with signal wire then, carry out online detection.The hyperchannel acoustic emission detection system is to make integrated circuit board to signals collecting and processing module to be installed in the detector main frame, and main frame links to each other with computing machine, and the polylith integrated circuit board can be installed, and expands to many passages; Computing machine installation and measuring analytic system software carries out real-time analysis to the data of gathering.During detection; Computing machine and detector main frame are placed near the Electrical Safety of storage tank, the smooth place of physical features; Be fixed on sensor on the storage tank wallboard with the magnetic deck, each sensor all is connected on the corresponding sense channel through signal wire, detects then and analyzes.
No matter being to use the single channel detector still is the multi-channel detection system, all there is the situation of outer signal line, signal wire is exposed and receives the interference of neighbourhood noise easily, causes the acquired signal distortion; And signal wire is relatively fragile, is exposed to the outside and damages easily, influences detector and normally uses; Compare with the single channel detector, the needed signal wire of multi-channel detection system is longer, and the work of when detecting, arranging and removing the take-up cable is very numerous and diverse, occurs the cable communication failure sometimes and influences the continuation of detected activity.
Summary of the invention
In order to overcome that still there is the outer signal line in the single channel acoustic emission detector and the problem brought; The present invention designs a kind of line-connection type acoustic emission detector of exempting from; This detector adopts the integration design, exempts the outside line of instrument, uses Radio Transmission Technology to carry out data transmission.
The technical solution adopted for the present invention to solve the technical problems is: the detector shell uses phenoplast to make, with weight reduction, reduce cost.Detector is made up of sensor unit, signals collecting and processing unit, power supply unit, wireless transmission unit four parts.Sensor unit is positioned at the front end of detector; Perforate can make sensor expose in the middle of the front-end protection lid, is inlaid with magnet on every side, and sensor is placed in the deck; Deck links to each other with separation layer through spring; Under the double action of spring force and magnetic pull, sensor closely contacts with the storage tank wallboard, reaches good coupling effect.Detector front-end protection lid can take off, and is convenient to more emat sensor.The separation layer back is signals collecting and processing unit, power supply unit and wireless transmission unit successively, and the thin metal layer that one deck is made by ferrimagnet is lining in inner surface of outer cover, avoids magnetic field of magnets to influence these unit operate as normal, plays the effect of magnetic shielding.Signals collecting and processing unit are made up of prime amplifier module, filter module, main amplifier module, waveform acquisition and data memory module; Power supply unit is made up of one group of rechargeable battery; The detector rear end is a wireless transmission unit, adopts between technology of infrared transmission and the computing machine and carries out synchronization timing and data transmission.Influence the degree of coupling of sensor and storage tank wallboard in order to eliminate the detector self gravitation; Use the adjustable type tripod to support detector; Sensor is closely contacted with the storage tank wallboard; Adjustment sensor height that again can be quantitative makes all the sensors be in same plane, and stablizes motionless.
The invention has the beneficial effects as follows that the design of exempting from line-connection type is integrated in one calibrate AE sensor and signals collecting and processing unit, the signal of avoiding aerial lug to bring disturbs and the instrument failure problem; The design of adjustable type support can be adjusted the setting height(from bottom) of sensor, makes all the sensors place at grade, and it is good to keep being coupled between sensor and the storage tank wallboard, plays the effect of stable support.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is a detector agent structure synoptic diagram of the present invention.
Fig. 2 is a detector scheme of installation of the present invention.
Fig. 3 is a data transmission procedure synoptic diagram of the present invention.
Fig. 4 is an application example synoptic diagram of the present invention.
Embodiment
In Fig. 1, the front-end protection lid 3 that is inlaid with magnet 2 links to each other with housing 6 with thread forms, and housing 6 is divided into cup and back chamber by separation layer 7.Sensor unit 21 is positioned at the cup of housing 6, is made up of sensor 1, deck 17 and spring 18.Be nested on the deck 17 after sensor 1 is inserted good plug 5, deck 17 links to each other with spring 18, is fixed on the separation layer 7.Have circular holes in the middle of the front-end protection lid 3, can fixation of sensor 1, also can take off front-end protection lid 3, more emat sensor 1.Inside surface in chamber, housing 6 back is lined with the very thin magnetic masking layer of one deck 13; It is made by ferrimagnet; Signals collecting and processing unit 22, power supply unit 23 and wireless transmission unit 24 to being positioned at chamber, housing 6 back play magnetic screening action, avoid these unit operate as normal of influence of magnetic field.Signal wire 4 sees through separation layer 7 and links to each other with processing unit 22 with signals collecting, and this unit is made up of prime amplifier module 8, filter module 9, main amplifier module 10, waveform acquisition and data memory module 11; Power supply unit 23 is made up of 3 rechargeable batteries 12, through 20 pairs of each module for power supply of front of power lead; Wireless transmission unit 24 is made up of infrared transmission interface 15 and infrared butt joint window 16; Infrared transmission interface 15 is installed in housing 6 backmost; Infrared butt joint window 16 is inlayed and is installed in the rear end over cap 14, and rear end over cap 14 and housing 6 link to each other with thread forms.
At Fig. 2 (a) with (b), detector is cylindrical, and sleeve 25 firmly is stuck on the sleeve draw-in groove 19 on the detector, uses screw to link to each other with the pillar 26 of band scale, and connecting portion can rotate flexibly, is convenient to adjust the angle of detector.A-frame 28 is positioned on the ground, and detector is had sensor 1 one ends towards the storage tank direction, after adjustment pillar 26 makes detector be in the height of requirement, and tighten the screws knob 27.So just can all be fixed on sustained height to each detector of participating in detected activity, guarantee that sensor is in same plane; In addition, can also prevent that sensor 1 is contacted with the storage tank wallboard is not tight because of detector self gravitation influence, keep good coupling between the two.
In Fig. 3 (a); Acoustic emission detector is placed on 29 li in data transmission case; The infrared butt joint window 16 of each detector aligns with the infrared window 30 that docks on data transmission case 29 lids, and there is a USB interface 31 on data transmission case 29 lid right sides, are used to connect computing machine.In Fig. 3 (b); Data transmission case 29 is connected with computing machine 33 through usb data line 32; Can synchronous clock, the geocoding of all detectors, the time that starts and stop to detect etc. be set downwards through computing machine 33, also can upwards be transferred to computing machine 33 to the Wave data that each detector collects.
In Fig. 4, enumerated out the distribution situation of 6 detectors.Begin counterclockwise from passing in and out oily short tube 34; Around evenly distributing in 36 1 weeks of storage tank wallboard; Confirm the installation site of detector, according to from 1# to 6# number consecutively, the annex of as far as possible avoiding storage tank is as passing in and out oily short tube 34, manhole 37 etc.; Detector lies in a horizontal plane on the oil storage tank foundation 35, and front end is close to storage tank wallboard 36 through couplant.The testing staff need write down the corresponding relation of knowing detector geocoding and installation site numbering.
[1] Zhang Junzhe. Dynamic Non-Destruction Measurement and application thereof (second edition) [M]. Beijing: Science Press, 2010.
Claims (5)
1. acoustic emission detector; In the good shell of magnetic shield performance, calibrate AE sensor, signals collecting are installed in detector inside with processing unit, power supply unit and transmission unit, need not aerial lug; It is characterized in that: calibrate AE sensor is installed in the detector front end; Under the double action of spring force and magnetic pull, closely contact with the storage tank wallboard, reach good coupling effect; The adjustable type A-frame can be adjusted the setting height(from bottom) of sensor, makes all the sensors place at grade, can also keep the coupling of sensor and storage tank wallboard good, plays the effect of stable detection appearance.
2. acoustic emission detector according to claim 1; It is characterized in that: the sensor deck is fixed on the separation layer of housing with spring; Sensor embeds deck after inserting good plug; Pass the middle circular hole of front-end protection lid and contact with the storage tank wallboard, because the elastic force effect of spring, surface of contact can highlight.
3. acoustic emission detector according to claim 1 is characterized in that: have the circular hole that sensor is passed in the middle of the front-end protection lid, be inlaid with magnet on every side.
4. acoustic emission detector according to claim 1 is characterized in that: the detector shell uses phenoplast to make, with weight reduction, reduce cost; The detector inner surface of outer cover is lined with the very thin metal level that one deck uses ferrimagnet to make, and inner components and parts is played the effect of magnetic shielding.
5. acoustic emission detector according to claim 1 is characterized in that: detector is fixed on the A-frame through sleeve, is carved with scale on the centre strut of adjustable type A-frame, setting height(from bottom) that can clear and definite sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210006750 CN102565195B (en) | 2012-01-10 | 2012-01-10 | Connection-free type acoustic emission detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210006750 CN102565195B (en) | 2012-01-10 | 2012-01-10 | Connection-free type acoustic emission detector |
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| CN102565195A true CN102565195A (en) | 2012-07-11 |
| CN102565195B CN102565195B (en) | 2013-12-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441197A (en) * | 2008-12-15 | 2009-05-27 | 天津大学 | Detection system and detection method of large-scale storage tank bottom corrosion |
| KR20110060703A (en) * | 2009-11-30 | 2011-06-08 | 주식회사 렉터슨 | Acoustic emission sensor apparatus and wireless defect diagnostics system for high pressure pipe using thereof |
| CN202002913U (en) * | 2011-01-31 | 2011-10-05 | 中钢集团武汉安全环保研究院有限公司 | Wireless transmission acoustic emission monitoring system |
| CN102253124A (en) * | 2011-04-21 | 2011-11-23 | 北京航空航天大学 | General fixing device for probe of acoustic emission detection apparatus |
| CN202442998U (en) * | 2012-01-10 | 2012-09-19 | 税爱社 | Acoustic emission detecting instrument without connecting wires |
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2012
- 2012-01-10 CN CN 201210006750 patent/CN102565195B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441197A (en) * | 2008-12-15 | 2009-05-27 | 天津大学 | Detection system and detection method of large-scale storage tank bottom corrosion |
| KR20110060703A (en) * | 2009-11-30 | 2011-06-08 | 주식회사 렉터슨 | Acoustic emission sensor apparatus and wireless defect diagnostics system for high pressure pipe using thereof |
| CN202002913U (en) * | 2011-01-31 | 2011-10-05 | 中钢集团武汉安全环保研究院有限公司 | Wireless transmission acoustic emission monitoring system |
| CN102253124A (en) * | 2011-04-21 | 2011-11-23 | 北京航空航天大学 | General fixing device for probe of acoustic emission detection apparatus |
| CN202442998U (en) * | 2012-01-10 | 2012-09-19 | 税爱社 | Acoustic emission detecting instrument without connecting wires |
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| CN102565195B (en) | 2013-12-18 |
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