CN205861609U - A kind of electromagnetic transducer system of novel detection defect in rope - Google Patents
A kind of electromagnetic transducer system of novel detection defect in rope Download PDFInfo
- Publication number
- CN205861609U CN205861609U CN201620834688.8U CN201620834688U CN205861609U CN 205861609 U CN205861609 U CN 205861609U CN 201620834688 U CN201620834688 U CN 201620834688U CN 205861609 U CN205861609 U CN 205861609U
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- rope
- defect
- testing circuit
- steel wire
- circuit plate
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Abstract
This utility model specifically discloses the electromagnetic transducer system of a kind of novel detection defect in rope, including sensor outer housing, permanent magnet, testing circuit plate and testing circuit board mount, described sensor outer housing uses split type structure, bottom is provided with through hole, inside is provided with testing circuit board mount and installs groove, described testing circuit plate uses laterally zygomorphic semi-circular structure, described permanent magnet uses coaxial concentric arrangement to be embedded in the two ends of sensor outer housing, and described testing circuit board mount top is provided with screwed hole.The beneficial effects of the utility model are: be applied to by electromagnetic sensing technology in defect in rope detection, it is achieved that processing in real time and automatization's Non-Destructive Testing of defect in rope, and can measure number of drawbacks situation simultaneously.
Description
Technical field
This utility model relates to a kind of detection device, a kind of electromagnetism detecting steel wire rope internal-external defect
Sensing system, enables in particular to realize a kind of sensor number of drawbacks and measures.
Background technology
The world is typically attributed to two big classes defect in rope: cross section metal is long-pending loses (Loss of metal cross-
Sectional area, is called for short LMA) type defect and local (Local flaw, be called for short LF) type defect.LF type defect reflects steel
The degree of impairment of cord local such as fracture of wire etc, LMA type defect reflects the abrasion of steel wire rope relatively long distance such as distance, corruption
The degree of impairment of erosion etc.But the most domestic instrument for detecting steel wire rope can only detect one of them defect class mostly
Type, and accuracy of detection is the highest.Some instruments are not in place to the process of detection signal, easily interference signal occur thus affect me
Erroneous judgement to defect；And traditional artificial range estimation detection method is easily subject to the impact of factor and individual subjective factor, false drop rate is high；State
The inside and outside accuracy of instrument for wire rope standard is uneven, and the defect in steel wire rope all can not be had by most instrument
The detection of effect, flase drop missing inspection situation happens occasionally.The accident caused due to the defect of steel wire rope frequently occurs, therefore to steel wire rope
The effective detection method of defect has become as a problem in the urgent need to address during safe wire cable uses.
Utility model content
The purpose of this utility model is to change traditional detection method, makes full use of electromagnetic transducer theory structure simple, non-
Contact, detection signal are easily processed, the advantage of Non-Destructive Testing, electromagnetic sensing technology are preferably applied to defect in rope inspection
Survey field, it is provided that go out a kind of detection accurately, the defect in rope on-line detecting system of stability and high efficiency.
The technical solution adopted in the utility model is as follows:
A kind of electromagnet sensing system detecting defect in rope, including sensor outer housing, outside described sensor
Shell includes upper and lower symmetrically arranged upper shell and lower house, defines for steel wire to be measured between described upper shell and lower house
Restrict through gap；Along the direction of steel wire penetrating to be measured, being provided with as housing of the upper and lower symmetry in the two ends of upper and lower casing
Internal magnetic devices magnetic field being provided and being used for magnetizing steel wire rope to be measured, and in described magnetic field, it is provided with detection steel wire rope LF type
The Hall element of defect and the induction coil of detection steel wire rope LMA type defect, described Hall element is connected with testing circuit plate,
Described testing circuit plate, induction coil are all connected with data processing equipment.
Further, described magnetic devices uses the most concentric mode to be embedded in the two ends of sensor outer housing.
Further, described Hall element is provided with two groups, and one of which is connected with testing circuit plate I, another set with
Testing circuit plate II is connected, and testing circuit plate I, II are arranged relative to the axisymmetrical vertical with steel wire rope axis direction to be measured,
And often organize the Hall element circumferential direction cincture along steel wire rope to be measured.
Further, described testing circuit plate I, II each uses the semi-circular structure of upper and lower symmetry, and solid by support
It is scheduled in sensor outer housing.
Further, being provided with double groove inside described sensor outer housing, described support is embedded in sensor outer housing
In groove.
Further, described induction coil is sleeved on the outer ring of steel wire rope to be measured, and is positioned at testing circuit plate I, detection
Between circuit board II.
Further, described induction coil be by enamel-covered wire coiling can dissection type coil.
Further, described induction coil is connected with testing circuit plate III, described testing circuit plate III and data
Processing means is connected.
Further, described data processing equipment and a display device are connected.
Further, described magnetic devices uses permanent magnet.
This utility model use two kinds of detecting elements of a kind of sensor realize the detection respectively to two kinds of defects, detection
Result is carried out discriminant analysis by follow-up data processing means, substantially increases the precision of detection.Sensor outer housing and permanent magnetic
Ferrum can form stable magnetic loop in steel wire rope, and the stray field of defect formation and magnetic flux change are by Hall element and sensing
After Coil Detector formed analog voltage, then by testing circuit plate carry out system zeroing, Integral Processing, differential process, amplification,
It is sent to data processing equipment after the preliminary treatments such as A/D conversion process further.
Owing to steel wire rope is a kind of strong magnetic conductor, its permeability is more than 100 times of air permeability, therefore when steel wire rope quilt
If when the magnetic loop of permanent magnet and sensor outer housing composition is magnetized to saturated, steel wire rope is defective, the pcrmeability of its defective locations
Can reduce, thus cause the increase of magnetic resistance, the magnetic field being leaked to outside steel wire rope surface will be produced at defective locations, this magnetic field
Just it is used to the stray field of detected element testing.According to software emulation and experimental analysis: in LF type defect, stray field
Size and the size of defect and length have relation, defect becomes big or defect length is elongated, all can make stray field density and
Stray field peak value becomes big；For LMA type defect, steel wire rope sectional area amount of damage is the biggest, damage distance is the longest, all can make through steel
Magnetic flux within cord diminishes.Therefore the defect situation of steel wire rope can be judged according to the signal that detecting element detects.
Wherein Hall element is a kind of inspection being made up of matrix semiconductor thin-sheet material and work based on Hall effect principle
Surveying element, have when being energized Hall element externally-applied magnetic field to pass through its vertical direction, this element can produce Hall voltage, this electromotive force
It is directly proportional to electric current, magnetic field intensity.In magnetic field, the Hall voltage of its output is
K in formulahFor hall constant；IcControl electric current for input；B is the magnetic induction degree in magnetic field；For magnetic induction
Direction and Hall element work surface between angle.We place Hall element vertical steel cord surface, can eliminateRight
The impact of Hall voltage.Can be obtained by formula, when using certain control electric current, Hall voltage and magnetic induction are directly proportional.
Therefore, when we use Hall element to detect stray field, the big of stray field can be judged according to the size of Hall voltage
Little so judge steel wire rope defect situation.
When induction coil moves relative to steel wire rope, if the internal magnetic flux of steel wire rope changes, then can be in sensing
Its size of generation having induction electromotive force in coil is
ec=-nd Φ/dt=-n (d Φ/ds) (ds/dt)=-n (d Φ/ds) v
In formula, n is number of inductive coil turns, and d Φ/ds is the change relative to steel wire rope amount of movement of the steel wire rope internal magnetic flux
Rate, v is the steel wire rope speed relative to induction coil.Can be drawn by formula, when the number of turn and the speed of service one of induction coil
Regularly, the electromotive force that induction coil produces is the most relevant with the situation of change of magnetic flux in steel wire rope.Therefore damage when steel wire rope endogenous cause of ill
When hindering and produce internal magnetic flux change, it is possible to use induction coil realizes the detection to steel wire rope LMA type defect.To relatively
When the LMA type defect of distance detects, owing to defect changes the voltage letter that characteristic slowly causes induction coil to detect
Number usually mV level, amplitude is less, the persistent period is short, and this signal and magnetic flux are relevant for the differential d Φ/ds of time, because of
This uses integration method process detection signal that signal can be made to have more intuitive.
The beneficial effects of the utility model are:
This sensor is by the detection of the stray field of steel wire rope judging, defect exists and degree of injury, specifically
Turn to use Hall element to detect the leakage magnetic flux of steel wire rope and to use induction coil to judge to the main flux detecting steel wire rope
The LF type defect of steel wire rope and the degree of impairment of LMA type defect, thus realize the quantization of steel wire rope inside and outside defect, by inspection
Survey the degree of injury analyzing available steel wire rope and the damage position of signal.
Sensor can make steel wire rope be magnetized to saturation, specifically uses permanent magnet, sensor outer housing and passes through
Steel wire rope one complete magnetic loop of composition, makes steel wire rope magnetization completely.Sensor outer housing, induction coil and testing circuit plate are equal
Using split type structure, this structure is convenient to be dismantled and is adjusted sensor, eliminates the trouble of on-the-spot coiling induction coil,
Facilitate implementation the on-line checking to steel wire rope.
During the defectoscopy to steel wire rope, different detecting element detection this modes of different types of defect compare
Easily realizing the accurate measurement to defect, Hall element detection range is limited, therefore uses Hall element mode circumferentially
To realize all standing to steel wire rope circumference scope.In order to filter the interference signal shadow to testing result in detection environment
Ringing, this utility model have employed the method double for the Hall element differential process of layout, first detected by single Hall element
Signal is superimposed together through add circuit, the differential process of two paths of signals being then superimposed together, and by this method may be used
To eliminate the impact on detection signal of the interference signal, it is simple to increase signal to noise ratio to extract defect information.Induction coil is to magnetic field
Change less sensitive, so LMA signal induction coil being detected is integrated processing so that detection signal is the most intuitively
Reflection defect situation.
Electromagnetic Testing Technology is applied in defect in rope detection, it is achieved that damage of steel cable signal process in real time and
Automatization's Non-Destructive Testing, and number of drawbacks parameter can be measured simultaneously.
Accompanying drawing explanation
Fig. 1 is the system block diagram of electromagnetic transducer detection defect in rope；
Fig. 2 is analog signal processing circuit block diagram；
Fig. 3 is testing circuit plate and Hall element position schematic diagram；
Fig. 4 is sensor construction figure；
Wherein 1. steel wire rope to be measured, 2. Hall element, 3. testing circuit plate, 4. induction coil, 5 data processing equipments, 6.
Display device, 7. Hall element detection signal, 8. induction coil detection signal, 9. zeroing amplification module, 10. addition amplifies mould
Block, 11. differential amplification modules, 12. integration module, 13.A/D modular converter, 14. permanent magnets, 15. sensor outer housings, 16. inspections
Slowdown monitoring circuit board mount, 17. wires.
Detailed description of the invention
With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.
Conventional sensor is all to use a kind of element to detect defect, wherein uses Hall element to LMA type
There is detection signal weak when signal detects, be easily subject to disturb the impact of signal to make Detection results inconspicuous；And the line of induction
Enclosing insensitive, therefore when using induction coil to detect LF type defect, have detection signal time too short, tiny flaw cannot be known
Not, the shortcoming that accuracy of detection is the highest.In order to overcome these shortcomings, native system have employed two kinds of detecting elements of use realize respectively right
The detection of two kinds of defects, is analyzed screening by subsequent conditioning circuit to detection signal, thus draws the damage of dissimilar defect
Situation.
This utility model detects the electromagnet sensing system of defect in rope, including sensor outer housing 15, sensing
Device shell 15 includes upper and lower symmetrically arranged upper shell and lower house, defines for steel wire to be measured between upper shell and lower house
The gap that rope 1 passes；Along the direction of steel wire penetrating, being provided with as enclosure interior of the upper and lower symmetry in the two ends of upper and lower casing
Magnetic field it is provided and is used for magnetizing the magnetic devices of steel wire rope to be measured, and in described magnetic field, being provided with detection steel wire rope LF type defect
Hall element 2 and the induction coil 4 of detection steel wire rope LMA type defect, described Hall element and induction coil all with detect
Circuit board is connected, and described testing circuit plate is connected with data processing equipment.
The most as shown in Figure 1, Figure 2, Figure 3, Figure 4, this utility model includes 8 Hall elements 2, testing circuit plate 3, sense
Answer coil 4, data processing equipment 5, display device 6, permanent magnet 14, sensor outer housing 15；
Four Hall elements are one group, are placed on laterally zygomorphic testing circuit plate 3, and testing circuit plate 3 includes two pieces
Semi-circular structure, after two pieces of semi-circular structure put together so that steel wire rope the most from which between pass, testing circuit plate 3 passes through
Screw is fixed on testing circuit board mount 16 and is connected with data processing equipment 5 by wire 17；
Four Hall elements are looped around the circumferential direction of steel wire rope to be measured；
Induction coil 4 is connected with testing circuit plate III, and testing circuit plate III is connected with data processing equipment；Save in the drawings
Omit testing circuit plate III, induction coil 4 has been connected by wire 17 with data processing equipment 5；Induction coil 3 uses subdivision
Formula structure, can directly be buckled in around steel wire rope during detection.
Permanent magnet 14 is placed in sensor outer housing 15 both sides correspondence.The bottom circle of testing circuit plate and induction coil size
Diameter according to steel wire rope to be measured selects.
Further, described magnetic devices uses the most concentric mode to be embedded in the two ends of sensor outer housing.
Further, sensor outer housing 15 is internal is provided with double groove, and testing circuit board mount 16 is embedded in sensor outer housing
Groove in.
Further, induction coil is sleeved on the outer ring of steel wire rope to be measured, and between two testing circuit plates 3.
Further, induction coil be by enamel-covered wire coiling can dissection type coil.
Further, data processing equipment and a display device 6 are connected, and the defect type of steel wire rope is entered by display device
Row display.
As in figure 2 it is shown, multichannel Hall element detection signal 7 is sent to the amplification module 9 that returns to zero, zeroing amplification module 9 is sent out again
Giving addition amplification module 10, the signal after addition amplification module 10 will process again is sent to differential amplification module 11, and difference is put
Signal after big module will process is sent to A/D modular converter 13, and A/D modular converter 13 is connected with data processing equipment 5.
Induction coil detection signal 8 is directly connected with integration module 12, and integration module 12 is connected with data processing equipment 5.
Further, return to zero amplification module 9, and addition amplification module 10, differential amplification module 11, integration module 12, A/D turns
Die change block 13, these modules are all existing modules, do not carry out herein repeating.
Further, data processing equipment 5 is the device that PC or a single-chip microcomputer etc. have data processing function.
This utility model use two kinds of detecting elements of a kind of sensor realize the detection respectively to two kinds of defects, detection
Result is carried out discriminant analysis by follow-up data processing means, substantially increases the precision of detection.Sensor outer housing and permanent magnetic
Ferrum can form stable magnetic loop in steel wire rope, and the stray field of defect formation and magnetic flux change are by Hall element and sensing
After Coil Detector formed analog voltage, then by testing circuit plate carry out system zeroing, Integral Processing, differential process, amplification,
A/D conversion gathers data and is sent to data processing equipment process.
Owing to steel wire rope is a kind of strong magnetic conductor, its permeability is more than 100 times of air permeability, therefore when steel wire rope quilt
If when the magnetic loop of permanent magnet and sensor outer housing composition is magnetized to saturated, steel wire rope is defective, the pcrmeability of its defective locations
Can reduce, thus cause the increase of magnetic resistance, the magnetic field being leaked to outside steel wire rope surface will be produced at defective locations, this magnetic field
Just it is used to the stray field of detected element testing.According to software emulation and experimental analysis: in LF type defect, stray field
Size and the size of defect and length have relation, defect becomes big or defect length is elongated, all can make stray field density and
Stray field peak value becomes big；For LMA type defect, steel wire rope sectional area amount of damage is the biggest, damage distance is the longest, all can make through steel
Magnetic flux within cord diminishes.Therefore the defect situation of steel wire rope can be judged according to the signal that detecting element detects.
Wherein Hall element is a kind of inspection being made up of matrix semiconductor thin-sheet material and work based on Hall effect principle
Surveying element, have when being energized Hall element externally-applied magnetic field to pass through its vertical direction, this element can produce Hall voltage, this electromotive force
It is directly proportional to electric current, magnetic field intensity.In magnetic field, the Hall voltage of its output is
K in formulahFor hall constant；IcControl electric current for input；B is the magnetic induction degree in magnetic field；For magnetic induction
Direction and Hall element work surface between angle.We place Hall element vertical steel cord surface, can eliminate
Impact on Hall voltage.Can be obtained by formula, when using certain control electric current, Hall voltage just becomes with magnetic induction
Ratio.Therefore, when we use Hall element to detect stray field, stray field can be judged according to the size of Hall voltage
Size so that judge steel wire rope defect situation.
When induction coil moves relative to steel wire rope, if the internal magnetic flux of steel wire rope changes, then can be in sensing
Its size of generation having induction electromotive force in coil is
ec=-nd Φ/dt=-n (d Φ/ds) (ds/dt)=-n (d Φ/ds) v
In formula, n is number of inductive coil turns, and d Φ/ds is the change relative to steel wire rope amount of movement of the steel wire rope internal magnetic flux
Rate, v is the steel wire rope speed relative to induction coil.Can be drawn by formula, when the number of turn and the speed of service one of induction coil
Regularly, the electromotive force that induction coil produces is the most relevant with the situation of change of magnetic flux in steel wire rope.Therefore damage when steel wire rope endogenous cause of ill
When hindering and produce internal magnetic flux change, it is possible to use induction coil realizes the detection to steel wire rope LMA type defect.To relatively
When the LMA type defect of distance detects, owing to defect changes the voltage letter that characteristic slowly causes induction coil to detect
Number usually mV level, amplitude is less, the persistent period is short, and this signal and magnetic flux are relevant for the differential d Φ/ds of time, because of
This uses integration method process detection signal that signal can be made to have more intuitive.
During work, sensor outer housing and permanent magnet steel wire rope is magnetized to saturated, makes steel wire penetrating detection electricity
Road plate and induction coil, if defective in steel wire rope, then have the generation of stray field on steel wire rope surface, work as steel wire penetrating
When testing circuit plate and induction coil, stray field can sensed coil and the Hall element detection being placed on testing circuit plate
Arrive, on both detecting elements, have voltage signal accordingly produce, the voltage signal of generation and the defect situation of steel wire rope
Relevant.The voltage signal that Hall element produces amplifies through addition, differential amplification after signal is disturbed in elimination carries out A/D conversion, sense
The voltage signal answering coil to produce first passes through Integral Processing, is then amplified changing with A/D, then to the digital signal received
Process, PC carry out signal extraction, by obtaining steel wire rope inside and outside defect situation with the relative analysis of standard value.
Claims (10)
1. the electromagnetic transducer system of a novel detection defect in rope, it is characterised in that: include sensor outer housing, described
Sensor outer housing includes upper and lower symmetrically arranged upper shell and lower house, defines confession between described upper shell and lower house
The gap of steel wire penetrating to be measured；Along the direction of steel wire penetrating to be measured, setting of the upper and lower symmetry in the two ends of upper and lower casing
Promising enclosure interior provides magnetic field and is used for magnetizing the magnetic devices of steel wire rope to be measured, and is provided with detection steel in described magnetic field
The Hall element of cord LF type defect and the induction coil of detection steel wire rope LMA type defect, described Hall element and the line of induction
Circle is all connected with testing circuit plate, and described testing circuit plate is connected with data processing equipment.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: described
Magnetic devices use the most concentric mode to be embedded in the two ends of sensor outer housing.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: described
Hall element be provided with two groups, one of which is connected with testing circuit plate I, and another set is connected with testing circuit plate II, detection
Circuit board I, II are arranged relative to the axisymmetrical vertical with steel wire rope axis direction to be measured, and often organize Hall element along steel to be measured
The circumferential direction cincture of cord.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 3, it is characterised in that: described
Testing circuit plate I, II each use the semi-circular structure of upper and lower symmetry, and be fixed in sensor outer housing by support.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 4, it is characterised in that: described
Sensor outer housing inside be provided with double groove, described support is embedded in the groove of sensor outer housing.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 3, it is characterised in that: described
Induction coil be sleeved on the outer ring of steel wire rope to be measured, and between testing circuit plate I, testing circuit plate II.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: described
Induction coil be by enamel-covered wire coiling can dissection type coil.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: described
Induction coil be connected with testing circuit plate III, described testing circuit plate III is connected with data processing equipment.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: described
Data processing equipment and display device be connected.
The electromagnetic transducer system of a kind of novel detection defect in rope the most as claimed in claim 1, it is characterised in that: institute
The magnetic devices stated uses permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620834688.8U CN205861609U (en) | 2016-08-02 | 2016-08-02 | A kind of electromagnetic transducer system of novel detection defect in rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620834688.8U CN205861609U (en) | 2016-08-02 | 2016-08-02 | A kind of electromagnetic transducer system of novel detection defect in rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205861609U true CN205861609U (en) | 2017-01-04 |
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ID=57654674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620834688.8U Expired - Fee Related CN205861609U (en) | 2016-08-02 | 2016-08-02 | A kind of electromagnetic transducer system of novel detection defect in rope |
Country Status (1)
| Country | Link |
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| CN (1) | CN205861609U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333252A (en) * | 2018-02-07 | 2018-07-27 | 河南科技大学 | A kind of wire rope flaw detection system and its magnetic leakage signal detection device |
| CN113984884A (en) * | 2021-11-03 | 2022-01-28 | 广东省特种设备检测研究院中山检测院 | Magnetic induction flaw detection device suitable for different-interval steel wire rope sets |
-
2016
- 2016-08-02 CN CN201620834688.8U patent/CN205861609U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333252A (en) * | 2018-02-07 | 2018-07-27 | 河南科技大学 | A kind of wire rope flaw detection system and its magnetic leakage signal detection device |
| CN113984884A (en) * | 2021-11-03 | 2022-01-28 | 广东省特种设备检测研究院中山检测院 | Magnetic induction flaw detection device suitable for different-interval steel wire rope sets |
| CN113984884B (en) * | 2021-11-03 | 2024-05-10 | 广东省特种设备检测研究院中山检测院 | Magnetic induction flaw detection device suitable for steel wire rope groups with different pitches |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170802 |