CN2425362Y - Flaw magnetic-leakage detector - Google Patents
Flaw magnetic-leakage detector Download PDFInfo
- Publication number
- CN2425362Y CN2425362Y CN 00208971 CN00208971U CN2425362Y CN 2425362 Y CN2425362 Y CN 2425362Y CN 00208971 CN00208971 CN 00208971 CN 00208971 U CN00208971 U CN 00208971U CN 2425362 Y CN2425362 Y CN 2425362Y
- Authority
- CN
- China
- Prior art keywords
- switch
- probe
- output
- magnetic flux
- instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model relates to a flaw magnetic-leakage detector. The utility model is characterized in that the utility model comprises a magnetizing machine and a detecting system, wherein, the magnetizing machine is composed of a power transformer, a rectifier, a voltage regulator, a storage capacitor, a switch, a converting switch and a discharge circuit, and changing the position of the converting switch can magnetize work pieces or demagnetize the work pieces; the detecting system is composed of a driving mechanism, a grating, a probe, a signal processor, an A/D converter, a computer and a communication display system. The utility model can carry out the nondestructive crack quantitative detection of inner cracks of a bolt hole, a steel workpiece and a welding seam in the condition of no disintegration or less simple disassembly and assembly, and the utility model has high detecting precision.
Description
The utility model relates to a kind of instrument of nondestructive examination, particularly a kind of crackle Magnetic Flux Leakage Inspecting instrument.
In nondestructive examination, methods such as that method commonly used has is ultrasonic, current vortex, magnetic.UT (Ultrasonic Testing) is the method for detection of comparative maturity technically, and is all detectable to surface of the work crackle and underbead crack.But this method requires height to workpiece profile and cleanliness, will add couplant between probe and measured piece, to axial crack explanation rate variance, also is difficult for realization crackle detection by quantitative simultaneously, the easy omission of crackle.Current vortex flaw detection great advantage is a non-contact detecting.This method is influenced greatly by surface configuration, and can only carry out the flaw detection of surface of the work or nearly surface crack.Magnetic powder inspection also is to use more a kind of method, be particularly useful for flaw detection to the workpiece of complex contour, reliability is also high, particularly to the flaw detection of this workpiece of bolt hole, methods such as ultrasonic, current vortex all are difficult to finish the work, and magnetic particle method can be competent at preferably, and several method is all high before the remolding sensitivity.
Aircraft wing girder bolt hole is owing to be subjected to the effect of alterante stress and moment of torsion, and fatigue crack appears in regular meeting.The existence of these crackles can cause the major accident of aircraft girder fracture when flight.Therefore the flaw detection that should locate is of crucial importance.Because the critical dimension of girder fracture is little, the bolt hole aperture is also little, detection difficult, so the detection of bolt hole infant cracking is a difficult problem always.Magnetic powder inspection (adopting magnetcisuspension supernatant liquid method) can show crackle preferably, can detect the interior crackle of length more than 0.5mm that portal.But this method is easily introduced personal error entirely with the manual observation interpretation; Next is that magnetization current size and stability are bigger to the sensitivity influence, easily produces omission; The 3rd is to peel off at bolt hole to be difficult for distinguishing when the district is concealed with crackle.Therefore it is higher that the probability of omission and erroneous judgement appears in this method.
The purpose of this utility model is at the problems referred to above, proposes the bolt hole of a kind of length of detection by quantitative reliably more than 0.5mm and the crackle Magnetic Flux Leakage Inspecting instrument of the crack defect of other steel part.
Above-mentioned purpose of the present utility model is realized by following technical proposals.
A kind of crackle Magnetic Flux Leakage Inspecting instrument is characterized in that: forms by magnet charger and detection system, wherein:
Magnet charger is made up of power transformer, rectifier, voltage stabilizer, storage capacitor, switch, switch and discharge loop, the output of power transformer connects rectifier, rectifier is rectified into direct current with industrial frequency AC and send voltage stabilizer, the output of voltage stabilizer connects storage capacitor by switch, another contact of switch and another utmost point of storage capacitor connect the conversion switch, and the output of switch connects metallic conductor after connecing metallic conductor or being connected in series an inductance resistance;
Detection system is made up of driving mechanism, grating, probe, signal processor, A/D converter, computing machine and communication display system, this driving mechanism is controlled by computing machine, the driving of driving mechanism be coupling grating and probe, the output of probe connects signal processor, the output of signal processor connects computing machine by A/D converter, the output of grating connects computing machine, and letter display system and driving mechanism are connected in the output of computing machine.
Except that above-mentioned essential features, in implementation process, also can replenish following technology contents:
Probe is vertically to be arranged by a plurality of Halls (Hall) sheet to be installed in the steel pipe of a minor diameter; The back side at steel pipe is equipped with spring leaf; One termination of steel pipe is established a card extender, and the lead-in wire of the Hall plate in the probe enters card extender through inner core; Inner core and lid are to make with aluminum alloy materials;
Probe is vertically to be arranged by a plurality of 3.0 * 1.5 Hall (Hall) sheet to be installed in the steel pipe that diameter is 2mm;
Hall element in the probe is the bridge circuit connected mode that adopts the constant current power supply;
Signal processor is made up of multichannel amplification filtering circuit; Sort circuit has 9 the tunnel;
Amplification filtering circuit in the signal processor, its amplifier are the INA120 amplifier, and wave filter is the OPO7 wave filter;
Also be provided with rechargeable battery pack and in this magnet charger and be used for D.C. regulated power supply to rechargeable battery pack charging, a switch is connected rechargeable battery pack with above-mentioned voltage stabilizer;
Advantage of the present utility model is:
1. do not disintegrate or a small amount of simple dismounting condition under the internal fissure of bolt hole, steel parts, weld seam be can't harm the crackle detection by quantitative.
2. detection signal is carried out record, analyzing and processing and state are judged, are provided testing result intuitively.
3. multinomial detecting operation programs menu drives, prompting testing conditions before detecting, and operation requires and points for attention; Showing to detect has flawless result, provides handling suggestion.
4. can magnetize, demagnetize the bolt hole parts, the remanent magnetism after the demagnetization be not more than 3 Gausses.
The utility model is described in further detail below in conjunction with drawings and Examples:
Description of drawings:
Fig. 1 is a magnet charger structural representation of the present utility model.
Fig. 2 is each parts annexation synoptic diagram of detection system of the present utility model.
Fig. 3 is the assembly relation synoptic diagram of driving mechanism of the present utility model and grating and probe.
Crackle Magnetic Flux Leakage Inspecting instrument of the present utility model is by being made up of magnet charger and detection system, wherein:
Magnet charger as shown in Figure 1, formed by power transformer 1, rectifier 2, voltage stabilizer 3, storage capacitor 4, switch 7, switch 5 and discharge loop 6, the output of power transformer 1 connects rectifier 2, rectifier 2 is rectified into direct current with industrial frequency AC and send voltage stabilizer 3, the output of voltage stabilizer 3 connects storage capacitor 4 by the position set of switch 7, and another utmost point 9 of the another location of switch 7 " 2 " and storage capacitor 4 connects conversion switch 5.When magnetizing, earlier with 7 groups on switch to the position set, the output current of voltage stabilizer 3 is to storage capacitor 4 chargings, when voltage table pointed to certain value, to position " 2 ", 5 groups of switches were to position " 1,3 " with 7 groups on switch, storage capacitor 4 promptly by metallic conductor 10 discharges, promptly magnetizes to workpiece.When giving storage capacitor 4 charging beginnings, electric current is bigger, also inserts a thermistor R7 for this reason, and the electric current when utilizing its thermal resistance effect restriction to begin to charge is excessive.
When detection finishes the need demagnetization, then with 7 groups on switch to the position set, the output current of voltage stabilizer 3 is to storage capacitor 4 chargings, when voltage table points to certain value, with 7 groups on switch to position " 2 ", 5 groups of switches are to position " 2,4 ", and storage capacitor 4 connects metallic conductor 10 after by switch 7 and switch 5 serial connection one inductance L 1 and resistance R 8; The low cut vibration that utilizes rlc circuit to produce reduces the electric current that is added on the metallic conductor 10 gradually, thereby realizes demagnetization.Handle through demagnetization, the remanent magnetism in the bolt hole is less than 3 Gausses.
In addition, consider that some occasion do not have civil power and supply with, also be provided with rechargeable battery pack 33 and in this magnet charger and be used for rechargeable battery pack 33 being connected with voltage stabilizer 3 to D.C. regulated power supply 34, one switches 35 of rechargeable battery pack charging; After the energized, battery 33 is by D.C. regulated power supply 34 chargings; When no civil power is supplied with, connect switch 35, battery is promptly given voltage stabilizer 3 power supplies of magnet charger.
Detection system as shown in Figure 2, form by driving mechanism 11, grating 12, probe 13, signal processor 14, A/D converter 15, computing machine 16 and communication display system 17, this driving mechanism 11 is controlled by computing machine 16, two output driving shafts 19,20 of driving mechanism 11 connect grating 12 respectively and pop one's head in 13, the output signal line of probe 13 connects signal processor 14, the output of signal processor 14 connects computing machine 16 by A/D converter 15, the output of grating 12 also connects computing machine 16, and letter display system 17 and driving mechanism 11 are connected in the output of computing machine 16.Probe 13 is under driving mechanism 11 drives, move along the bolt hole wall, the crackle magnetic leakage signal of obtaining is after signal processor 14 carries out amplification filtering, become digital signal by A/D converter 15, this signal shows crack information by the display 18 of communication display system device 17 after machine 16 analyzing and processing as calculated.Grating 12 and probe 13 interlocks, the grating signal control computer sampling of output, equidistantly sample in the realization spatial domain.The detection of plane class crackle, driving mechanism 11 is motionless.
Signal processor is made up of multichannel amplification filtering circuit; In the present embodiment, signal processor is made up of 9 tunnel amplification filtering circuit; Amplifier in each road amplification filtering circuit in the signal processor is the INA120 amplifier, and wave filter is the OPO7 wave filter.
The assembly relation of Fig. 3 display driver mechanism and grating and probe, wherein, driving mechanism is made up of electrode 21 and reducer casing 22, electrode 21 is installed on the reducer casing 22, this reducer casing has two output shafts 19,20, wherein output shaft 19 connects grating 12, and output shaft 20 connects probe 13, and probe 13 is vertically to be arranged by a plurality of Halls (Hall) sheet 25 to be installed in the steel pipe 26 of a minor diameter; At the back side of steel pipe 26 spring leaf 27 is installed, its effect is for guaranteeing to pop one's head in to press close to well the bolt hole wall; One termination of steel pipe 26 is established a card extender 28, and the lead-in wire of the Hall plate 25 in the probe 13 enters card extender 28 through inner core 29; In order to prevent outside electromagnetic interference, inner core 29 and to cover 30 be to make with aluminum alloy materials; The also sheathed urceolus 32 in the outside of inner core, the bottom of urceolus 32 is provided with sheath 31, is used for the protection probe.
In the present embodiment, above-mentioned probe 13 is vertically to be arranged by 6 3.0 * 1.5 Hall (Hall) sheet to be installed in the steel pipe that diameter is 2mm, and steel pipe plays magnetic shielding cover; Hall element in the probe adopts the constant current power supply to reduce the influence of temperature to Hall voltage, adopts bridge circuit to compensate the not influence of equipotential electromotive force, so just can significantly reduce temperature the influence of Hall sheet work is improved its fidelity.
Signal processor is made up of multichannel amplification filtering circuit; In the present embodiment, sort circuit has 9 the tunnel; Amplification filtering circuit in the signal processor, its amplifier are the INA120 amplifier, and wave filter is the OPO7 wave filter.
Claims (7)
1, a kind of crackle Magnetic Flux Leakage Inspecting instrument is characterized in that: this crackle Magnetic Flux Leakage Inspecting instrument is made up of magnet charger and detection system:
Magnet charger is made up of power transformer, rectifier, voltage stabilizer, storage capacitor, switch, switch and discharge loop, the output of power transformer connects rectifier, rectifier is rectified into direct current with industrial frequency AC and send voltage stabilizer, the output of voltage stabilizer connects storage capacitor by switch, another contact of switch and another utmost point of storage capacitor connect the conversion switch, and the output of switch connects metallic conductor after connecing metallic conductor or being connected in series an inductance resistance;
Detection system is made up of driving mechanism, grating, probe, signal processor, A/D converter, computing machine and communication display system, this driving mechanism is controlled by computing machine, the driving of driving mechanism be coupling grating and probe, the output of probe connects signal processor, the output of signal processor connects computing machine by A/D converter, the output of grating connects computing machine, and letter display system and driving mechanism are connected in the output of computing machine.
2, as the said crackle Magnetic Flux Leakage Inspecting of claim 1 instrument, it is characterized in that:
Probe is vertically to be arranged by a plurality of Halls (Hall) sheet to be installed in the steel pipe of a minor diameter; The back side at steel pipe is equipped with spring leaf; One termination of steel pipe is established a card extender, and the lead-in wire of the Hall plate in the probe enters card extender through inner core; Inner core and lid are to make with aluminum alloy materials.
3, as the said crackle Magnetic Flux Leakage Inspecting of claim 2 instrument, it is characterized in that: probe is vertically to be arranged by a plurality of 3.0 * 1.5 Hall (Hall) sheet to be installed in the steel pipe that diameter is 2mm.
4, as the said crackle Magnetic Flux Leakage Inspecting of claim 1 instrument, it is characterized in that: the Hall element in the probe adopts the bridge circuit connected mode of constant current power supply.
5, as the said crackle Magnetic Flux Leakage Inspecting of claim 1 instrument, it is characterized in that: signal processor is made up of 9 tunnel amplification filtering circuit.
6, as claim 1,5 said crackle Magnetic Flux Leakage Inspecting instrument, it is characterized in that: the amplification filtering circuit in the signal processor, its amplifier are the INA120 amplifier, and wave filter is the OPO7 wave filter.
7, as the said crackle Magnetic Flux Leakage Inspecting of claim 1 instrument, it is characterized in that: also be provided with rechargeable battery pack and in this magnet charger and be used for D.C. regulated power supply to rechargeable battery pack charging, a switch is connected rechargeable battery pack with above-mentioned voltage stabilizer;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00208971 CN2425362Y (en) | 2000-04-07 | 2000-04-07 | Flaw magnetic-leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00208971 CN2425362Y (en) | 2000-04-07 | 2000-04-07 | Flaw magnetic-leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2425362Y true CN2425362Y (en) | 2001-03-28 |
Family
ID=33576205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00208971 Expired - Fee Related CN2425362Y (en) | 2000-04-07 | 2000-04-07 | Flaw magnetic-leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2425362Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385235C (en) * | 2005-12-06 | 2008-04-30 | 天津大学 | Method of determining pipeline welding crack stress concentration using metal magnetic memory detection technology |
| CN100432665C (en) * | 2005-08-05 | 2008-11-12 | 营口市北方检测设备有限公司 | Online detecting device and method for two-field leakage magnetic flux of defects on steel products surface |
| CN100588965C (en) * | 2007-09-25 | 2010-02-10 | 王祥国 | Railroad micro-magnetism flaw detector and its defectoscopy |
| CN101126739B (en) * | 2007-09-10 | 2010-09-08 | 于复生 | Welding tube soldering seam quality detection and defected welding tube automatic elimination control system |
| CN102507653A (en) * | 2011-10-11 | 2012-06-20 | 广东风华高新科技股份有限公司 | Annular piezoresistor microcrack detection device and method |
| CN104889177B (en) * | 2014-03-05 | 2016-09-07 | 鞍钢股份有限公司 | Safety protection method for flaw detector system |
| CN111678976A (en) * | 2020-06-22 | 2020-09-18 | 胡舟逸 | Electromagnetic nondestructive quality detection method and detection circuit and system thereof |
-
2000
- 2000-04-07 CN CN 00208971 patent/CN2425362Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432665C (en) * | 2005-08-05 | 2008-11-12 | 营口市北方检测设备有限公司 | Online detecting device and method for two-field leakage magnetic flux of defects on steel products surface |
| CN100385235C (en) * | 2005-12-06 | 2008-04-30 | 天津大学 | Method of determining pipeline welding crack stress concentration using metal magnetic memory detection technology |
| CN101126739B (en) * | 2007-09-10 | 2010-09-08 | 于复生 | Welding tube soldering seam quality detection and defected welding tube automatic elimination control system |
| CN100588965C (en) * | 2007-09-25 | 2010-02-10 | 王祥国 | Railroad micro-magnetism flaw detector and its defectoscopy |
| CN102507653A (en) * | 2011-10-11 | 2012-06-20 | 广东风华高新科技股份有限公司 | Annular piezoresistor microcrack detection device and method |
| CN102507653B (en) * | 2011-10-11 | 2014-04-16 | 广东风华高新科技股份有限公司 | Annular piezoresistor microcrack detection device and method |
| CN104889177B (en) * | 2014-03-05 | 2016-09-07 | 鞍钢股份有限公司 | Safety protection method for flaw detector system |
| CN111678976A (en) * | 2020-06-22 | 2020-09-18 | 胡舟逸 | Electromagnetic nondestructive quality detection method and detection circuit and system thereof |
| KR20220000901A (en) * | 2020-06-22 | 2022-01-04 | 지앙인 티엔룬 인포메이션 테크놀로지 컴퍼니 리미티드 | Electromagnetic non-destructive quality detection method and detection circuit and system therefor |
| KR102366867B1 (en) | 2020-06-22 | 2022-02-24 | 지앙인 티엔룬 인포메이션 테크놀로지 컴퍼니 리미티드 | Electromagnetic non-destructive quality detection method and detection circuit and system therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100470245C (en) | Resonance eddy detection method for surface crack | |
| CN110196276B (en) | Ferromagnetic material large-range damage low-frequency electromagnetic detection method based on broadband excitation | |
| CN103412038B (en) | The portable ACFM detector of a kind of Based PC/104 embedded system | |
| CN102182933A (en) | Nondestructive detection system and method for pulsed magnetic flux leakage defects and stresses | |
| CN2425362Y (en) | Flaw magnetic-leakage detector | |
| WO2006137854A2 (en) | Laminate material testing methods and systems | |
| US8841904B1 (en) | Nondestructive inspection probe and method | |
| CN104833720A (en) | Method for single-coil electromagnetic resonance detection of metal pipeline damage | |
| CN2754100Y (en) | Multifunctional electromagnetic detecting instrument | |
| CN102331451A (en) | Nondestructive detection method and device for electric leakage field | |
| CN214895021U (en) | Cable joint lead sealing position pulse eddy current detection device | |
| CN2718577Y (en) | Portable flaw detector for drilling tool | |
| CN1975407A (en) | Method for nondestructive testing iron and steel material quality and equipment thereof | |
| Nath et al. | Study of the new eddy current non-destructive testing sensor on ferromagnetic materials | |
| CN202330353U (en) | Conductive metal body non-destructive detection device based on electric leakage field | |
| Zhang et al. | Online Magnetic Flux Leakage Detection System for Sucker Rod Defects Based on LabVIEW Programming. | |
| Shanmugham et al. | Detection and monitoring of fatigue cracks | |
| CN202153218U (en) | Quantitative and nondestructive defect detection probe for oil casing pipe | |
| Porter | Use of magnetic flux leakage (MFL) for the inspection of pipelines and storage tanks | |
| Simpson et al. | Flux-focusing eddy current probe and method for flaw detection | |
| CN202735302U (en) | Electromagnetic acoustic emission nondestructive testing device for metal material | |
| CN203191354U (en) | Eddy current flaw detector | |
| CN102636559A (en) | Electromagnetic acoustic emission non-destructive detection method and device of metal material | |
| Augustyniak et al. | NDE of creep damage at seam welds via MAE | |
| Li et al. | Instrumental Configuration of Electromagnetic Thermography and Optical Thermography |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |