CN106093184B - Bridge cable electromagnetic flaw detection device and its application - Google Patents
Bridge cable electromagnetic flaw detection device and its application Download PDFInfo
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- CN106093184B CN106093184B CN201610533659.2A CN201610533659A CN106093184B CN 106093184 B CN106093184 B CN 106093184B CN 201610533659 A CN201610533659 A CN 201610533659A CN 106093184 B CN106093184 B CN 106093184B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/85—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using magnetographic methods
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Abstract
The invention discloses a kind of bridge cable electromagnetic flaw detection device and its applications, it is related to bridge cable field of non destructive testing, bridge cable electromagnetic flaw detection device includes sleeve, multiple magnet exciting coils are fixed on sleeve outer wall, inner wall is equipped with multiple grooves, and the search coil for detecting leakage field magnetic flux at fracture of wire is fixed in each groove.Bridge cable nondestructive detection system, including bridge cable electromagnetic flaw detection device；The insulated gate bipolar transistor being connected with magnet exciting coil；The power supply unit being connected with insulated gate bipolar transistor；The computer being connected with insulated gate bipolar transistor.Signal processing apparatus, the damage signal issued for receiving and processing whole search coils, and damage signal is sent to computer by treated.Bridge cable electromagnetic flaw detection device detection area of the invention it is big and it is light-weight can be detected by the high-altitude bridge cable for being not easy to reach to people, detectivity is adjusted in bridge cable nondestructive detection system of the invention, can improve detection accuracy rate.
Description
Technical field
The present invention relates to bridge cable field of non destructive testing, and in particular to a kind of bridge cable electromagnetic flaw detection device and its answers
With.
Background technique
Currently, largely using bridge as the building of representative use cable architecture, important primary structure member drag-line it is lossless
Detection has become bridge structure safe and healthy aspect is increasingly interesting issue.Since the length of these drag-lines is very long, frame
Outage degree is higher, and detection effect is also undesirable simultaneously for danger close by the way of artificial detection.Robot carries harmless flaw detector
It is the safe and reliable technological means of comparison that device, which carries out detection, but requires that detector device weight is as light as possible, volume is as small as possible, energy
Exhaust may it is low, data are as reliable as possible.
Existing multiple technologies scheme proposes that wherein video shooting has been carried out drag-line surface layer to drag-line realization non-destructive testing
Open defect detection.As for the nondestructive inspection detection inside drag-line, mainly there are magnetic leakage detection, sound emission, X based on Hall at present
The methods of ray.But sound emission scheme realizes that technical difficulty is larger, X-ray scheme volume weight is big, and energy consumption is high, so this
Two schemes are appropriate only for the carrying out flaw detection of anchor head under cable wire.Therefore, the scheme for being relatively suitble to bridge cable detection is that leakage field is visited
Wound.
Magnetic leakage detection using permanent magnet combination Hall element mode is the existing reliable skill of wire rope standard comparative maturity
Art, in fields such as mine, pipelines using more, also there is fairly perfect product in market.But for being equally the bridge of wirerope
Beam drag-line, the technical solution but encounter more problem in the detection of bridge cable: one is, the sensitivity of Hall element is not
It is high, it is necessary to which that as far as possible close to cable wire surface, however there is nearly one centimeter thick PE sheath on bridge cable surface layer.The second is bridge cable
It is relatively large in diameter, the volume of Hall element is very small, and detection area is also small, even if along 8 Hall elements of cable wire one week arrangement, effectively
Detection area still less than the 10% of cable wire periphery so that most of cable wire surface missing inspection.The third is Hall element need compared with
It works under high-intensity magnetic field, it is necessary to additional permanent magnet.As gauge of wire increases, the volume of additional permanent magnet and its fixed structure
It is sharply increased with weight, to the wirerope moved in fixed location detection, there is no problem for this, but is not suitable in high altitude location
Bridge cable.
Summary of the invention
In view of the deficiencies in the prior art, big the purpose of the present invention is to provide a kind of detection area and adapt to visit
Survey the bridge cable electromagnetic flaw detection device of the bridge cable of high altitude location.
To achieve the above objectives, the technical solution adopted by the present invention is that: a kind of bridge cable electromagnetic flaw detection device is used for
Detect the fracture of wire of the bridge cable, comprising: sleeve is fixed with multiple magnet exciting coils on the sleeve outer wall, in the sleeve
It is additionally provided with multiple grooves on wall, the search coil for detecting leakage field magnetic flux at the fracture of wire is fixed in each groove.
Based on the above technical solution, the sleeve includes the first noumenon being releasably secured together and second
Ontology, each magnet exciting coil include removably two parts, and a portion is fixed on the first noumenon, another
Part is fixed on second ontology, and after the first noumenon and the second ontology are fixed, each magnet exciting coil is by can
Releasably two parts are integrated to form closed loop.
Based on the above technical solution, the first noumenon includes the first side end face and the second side end face, and described the
One side end face is equipped with slot identical with the magnet exciting coil quantity, and second side end face is equipped with and the magnet exciting coil
The identical plug of quantity；Second ontology includes third side end face and the 4th side end face, the third side end face be equipped with and
The identical plug of the magnet exciting coil quantity, the 4th side end face are equipped with slot identical with the magnet exciting coil quantity,
The front end of the inner wall of the slot and plug is conductor, one end of the first noumenon and the magnet exciting coil on the second ontology with
The slot connection, the other end are connect with the plug.
Based on the above technical solution, the material of the first noumenon and the second ontology is to be beaten with ABS wire rod through 3D
The un-conducted magnetic material that print machine printing and making goes out.
Based on the above technical solution, the sleeve is circular sleeve, and the sleeve is equipped with two circles along the set
The quantity of the groove that the circumferencial direction of cylinder inner wall is uniformly arranged, each circle groove is n, wherein 20≤n≤30, each described
The search coil is fixed in groove, and the search coil fixed in the groove is rectangular.
At the same time, the present invention also provides a kind of adjustable detectivity and the big lossless inspections of bridge cable of detection area
Examining system.
To achieve the above objectives, the technical solution adopted by the present invention is that: a kind of bridge cable nondestructive detection system, including upper
State bridge cable electromagnetic flaw detection device, the bridge cable nondestructive detection system further include:
Insulated gate bipolar transistor is connected with the magnet exciting coil；
Power supply unit is connected with the insulated gate bipolar transistor；
Computer is connected with the insulated gate bipolar transistor；And
Signal processing apparatus is used to receive and process the damage signal that all search coil issues, and will processing
Damage signal afterwards is sent to the computer.
Based on the above technical solution, the power supply unit includes storage capacitor and DC power supply, the energy storage electricity
Hold one end to be connected with the insulated gate bipolar transistor, the other end is connected with the DC power supply；The signal processing apparatus
Including the filter, signal amplifier and analog-digital converter being sequentially connected, the filter and whole search coil phases
Even, the analog-digital converter is connected with the computer.
At the same time, the present invention also provides a kind of methods that can improve detection accuracy rate.
To achieve the above objectives, the technical solution adopted by the present invention is that: it is a kind of utilize above-mentioned bridge cable non-destructive testing system
The method of system detection bridge cable, method includes the following steps:
S1. the bridge cable electromagnetic flaw detection device is fixed on bridge cable, is located at the magnet exciting coil described
The fragment position to be checked of bridge cable；
S2. the computer provides instruction, and is controlled in the magnet exciting coil by the insulated gate bipolar transistor
The frequency and pulsewidth of pulse current；
S3. the signal processing apparatus handles the damage signal received from the search coil, and is sent to
The computer；
S4. the computer damage signal that receives that treated, completes the detection of the bridge cable after analytical judgment.
Based on the above technical solution, the normal direction of the magnet exciting coil and any one of search coil
Normal direction is orthogonal.
Based on the above technical solution, the signal processing apparatus includes the filter being sequentially connected, signal amplification
Device and analog-digital converter, the filter are connected with whole search coils, the analog-digital converter and the computer
It is connected.
Compared with the prior art, the advantages of the present invention are as follows:
(1) the bridge cable electromagnetic flaw detection device in the present invention which is provided with multiple for detecting at bridge cable fracture of wire
The search coil of leakage field magnetic flux, search coil compare traditional Hall element, and detection area is big, and bridge cable may be implemented
The case where all detections, reduction missing inspection.Furthermore the bridge cable electromagnetic flaw detection device in the present invention, does not need additional permanent magnetism
Body, small in volume can preferably adapt to the detection of the bridge cable in high altitude location.
(2) the bridge cable nondestructive detection system in the present invention is produced from magnet exciting coil with pulse high current excitation
By vibrating, so that alternating magnetic field excitation is carried out to bridge cable, with the search coil detection bridge in the direction that is orthogonal with excitation field
The leakage field magnetic flux that beam drag-line fracture of wire is formed.When being detected using this bridge cable nondestructive detection system, detectivity is unlike suddenly
Your element is dependent only on the sensitivity of Hall element like that, but depends on the circuits such as exciting circuit and amplification, filtering, mirror wave
Performance it is accurate to finally improve detection so as to change detectivity by this bridge cable nondestructive detection system
Rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Bridge drag-line electromagnetic flaw detection device of the present invention；
Fig. 2 is the structural schematic diagram of the first noumenon in the present invention；
Fig. 3 is the structural schematic diagram of the second ontology in the present invention；
Fig. 4 is the schematic block diagram of Bridge drag-line nondestructive detection system of the present invention.
In figure: 1- sleeve, 11- groove, 12- the first noumenon, the first side end face 12a-, the second side end face 12b-, 13- second
Ontology, 13a- third side end face, the 4th side end face 13b-, 14- slot, 15- plug, 2- magnet exciting coil, 3- search coil, 4- are exhausted
Edge grid bipolar junction transistor, 5- power supply unit, 51- storage capacitor, 52- DC power supply, 6- computer, 7- signal processing apparatus,
71- filter, 72- signal amplifier, 73- analog-digital converter.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Shown in Figure 1, the present invention provides a kind of bridge cable electromagnetic flaw detection device, is used to detect the disconnected of bridge cable
Silk, including sleeve 1, are fixed with multiple magnet exciting coils 2, the quantity of magnet exciting coil 2 can according to need rationally on 1 outer wall of sleeve
Setting.Referring also to shown in Fig. 2, it is additionally provided with multiple grooves 11 on 1 inner wall of sleeve, is fixed in each groove 11 for detecting bridge
The search coil 3 of leakage field magnetic flux at beam drag-line fracture of wire.
Shown in referring to figs. 2 and 3, the bridge cable electromagnetic flaw detection device in the present invention is installed to bridge for convenience and is drawn
Suo Shang, the sleeve 1 in the present invention include the first noumenon 12 and the second ontology 13 that are releasably secured together, when needing bridge
When beam drag-line electromagnetic flaw detection device is installed to bridge cable, it is only necessary to first dismantle the first noumenon 12 and the second ontology 13, then again
The first noumenon 12 and the second ontology 13 are buckled on bridge cable.Correspondingly, each magnet exciting coil 2 include can
Releasably two parts, a portion are fixed on the first noumenon 12, and another part is fixed on the second ontology 13, work as first
After body 12 and the second ontology 13 are fixed, each magnet exciting coil 2 is integrated by removably two parts forms closed loop.
Specifically, the first noumenon 12 includes the first side end face 12a and the second side end face 12b, the first side end face in the present invention
12a is equipped with slot 14 identical with 2 quantity of magnet exciting coil, and the second side end face 12b is equipped with identical with 2 quantity of magnet exciting coil
Plug 15.Second ontology 13 includes third side end face 13a and the 4th side end face 13b, and third side end face 13a is equipped with and excitation wire
The identical plug 15 of 2 quantity is enclosed, the 4th side end face 13b is equipped with slot 14 identical with 2 quantity of magnet exciting coil.Slot 14 it is interior
The front end of wall and plug 15 is conductor, and one end and slot 14 of the first noumenon 12 and the magnet exciting coil 2 on the second ontology 13 connect
It connects, the other end is connect with plug 15.Slot 14 on first side end face 12a is connected with the plug 15 on the 13a of third side end face,
The plug 15 on the second side end face 12b is connected with the slot 14 on the 4th side end face 13b simultaneously, it can be by bridge cable electromagnetism
Failure detector is installed on bridge cable.Simultaneously as two parts sheet of magnet exciting coil 2 is as conducting wire, when 12 He of the first noumenon
After second ontology 13 is fixed, magnet exciting coil 2 also forms closed loop by the two parts separated.
The first noumenon 12 and 13 material of the second ontology in the present invention are un-conducted magnetic material, wherein with ABS
(Acrylonitrile butadiene Styrene copolymers, acrylonitrile-butadiene-styrene copolymer) wire rod warp
3D printer printing and making effect is optimal.
In addition, the sleeve 1 in the present invention is circular sleeve, groove 11 is uniformly arranged along the circumferencial direction of 1 inner wall of sleeve, and
The search coil 3 being fixed in groove 11 is rectangular.In order to increase detection area, reach all standing of bridge cable surface, this hair
Sleeve 1 in bright is equipped with the groove 11 that two circles are uniformly arranged along the circumferencial direction of 1 inner wall of sleeve, 11 quantity of groove of each circle
For n, in order to reach optimum detection effect, the value range of n is 20≤n≤30, is guaranteeing the quantity of groove 11 before 20-30
It puts, the size for changing search coil 3 in groove 11 and groove 11 is suitable for the variation of bridge cable diameter of wire cord.
Bridge cable electromagnetic flaw detection device in the present invention does not need additional permanent magnet, and small in volume can be more
The detection of good bridge cable of the adaptation in high altitude location.
Shown in Figure 4, the present invention also provides a kind of bridge cable nondestructive detection systems comprising above-mentioned bridge cable
Electromagnetic flaw detection device and insulated gate bipolar transistor 4, power supply unit 5, computer 6 and signal processing apparatus 7.
Insulated gate bipolar transistor 4 is connected with magnet exciting coil 2, can control by insulated gate bipolar transistor 4
The frequency and pulsewidth of pulse current in magnet exciting coil 2, when the frequency of pulse current is higher, Bridge drag-line electromagnetic test of the present invention
Device detection is sensitiveer.
Power supply unit 5 is connected with insulated gate bipolar transistor 4.For providing wink to insulated gate bipolar transistor 4
When electric current.Power supply unit 5 in the present invention includes storage capacitor 51 and DC power supply 52, and 51 one end of storage capacitor and insulated gate are double
Bipolar transistor 4 is connected, and the other end is connected with DC power supply 52.Wherein, DC power supply 52 is that storage capacitor 51 provides charging energy
Amount, storage capacitor 51 provide transient current to insulated gate bipolar transistor 4.
Computer 6 is connected with insulated gate bipolar transistor 4, and computer 6 provides instruction, can be double by insulated gate
Bipolar transistor 4 controls the frequency and pulsewidth of pulse current in magnet exciting coil 2.
Signal processing apparatus 7, one end are connected with whole search coils 3, the other end and 6 phase of computer
Even.Signal processing apparatus 7 is used to receive and process the damage signal that whole search coils 3 issue, and damage is believed by treated
Number it is sent to computer 6.Signal processing apparatus 7 in the present invention includes filter 71,72 and of signal amplifier being sequentially connected
Analog-digital converter 73, wherein filter 71 is connected with whole search coils 3, analog-digital converter 73 and 6 phase of computer
Even.By adjusting the parameter of filter 71 and signal amplifier 72, i.e., the detection spirit of changeable bridge cable nondestructive detection system
Sensitivity is sent out after signal processing apparatus 7 handles the damage signal received by the search coil 3 by analog-digital converter 73 again
Computer 6 is given, the detection of bridge cable is completed after being analyzed and determined by computer 6.
In conclusion bridge cable nondestructive detection system in the present invention and traditional in the way of Hall element detection
It compares, detectivity is dependent only on the sensitivity of Hall element unlike using Hall element detection mode, but takes
Certainly in the performance of the circuits such as exciting circuit and amplification, filtering, mirror wave, simultaneously as the detection area covering of search coil 3 is big,
Whole detections that bridge cable may be implemented, avoid generating missing inspection inside bridge cable.
The present invention also provides a kind of method using above-mentioned bridge cable nondestructive detection system detection bridge cable, this method
The following steps are included:
S1. bridge cable electromagnetic flaw detection device is fixed on bridge cable, make magnet exciting coil 2 be located at bridge cable to
Examine fragment position；
In order to obtain best detection effect, the normal direction of the magnet exciting coil 2 in the present invention and any one detection line
The normal direction of circle 3 is orthogonal.
S2. computer 6 provides instruction, and controls pulse current in magnet exciting coil 2 by insulated gate bipolar transistor 4
Frequency and pulsewidth；
S3. signal processing apparatus 7 handles the damage signal received from search coil 3, and is sent to computer
6；
When inside bridge cable without fracture of wire, the magnetic flux across search coil 3 is constant, influence electricity in search coil 3
Stream, there are when fracture of wire inside bridge cable, bridge cable cross-sectional area changes, and the magnetic flux across search coil 3 is sent out
Raw change causes to generate induced current, i.e. damage signal in search coil 3.
Signal processing apparatus 7 in the present invention includes filter 71, signal amplifier 72 and the analog-to-digital conversion being sequentially connected
Device 73, filter 71 are connected with whole search coils 3.Analog-digital converter 73 is connected with computer 6, adjusts filter 71 and letter
The parameter of number amplifier 72, thus it is possible to vary the detection sensitivity of bridge cable nondestructive detection system, so that it is accurate to improve detection
Rate.
S4. computer 6 receives treated damage signal, and the detection of bridge cable is completed after analytical judgment.
It, can be to avoid the deficiency of conventional Hall element testing mode, Detection accuracy using the detection method in the present invention
It is higher.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of bridge cable electromagnetic flaw detection device, is used to detect the fracture of wire of the bridge cable characterized by comprising
Sleeve (1) is fixed with multiple magnet exciting coils (2) on sleeve (1) outer wall, and the sleeve (1) includes being removably attached to
The first noumenon (12) and the second ontology (13) together, the first noumenon (12) and the second ontology (13) material are non-magnetic
Material, each magnet exciting coil (2) include that removably two parts, a portion are fixed on the first noumenon (12)
On, another part is fixed on second ontology (13), after the first noumenon (12) and fixed the second ontology (13), often
A magnet exciting coil (2) is integrated by removably two parts forms closed loop, is additionally provided on sleeve (1) inner wall
Multiple grooves (11), the interior search coil (3) being fixed with for detecting leakage field magnetic flux at the fracture of wire of each groove (11)；
The first noumenon (12) includes the first side end face (12a) and the second side end face (12b), first side end face (12a)
It is equipped with slot (14) identical with the magnet exciting coil (2) quantity, second side end face (12b) is equipped with and the excitation
The identical plug (15) of coil (2) quantity；Second ontology (13) includes third side end face (13a) and the 4th side end face
(13b), the third side end face (13a) are equipped with plug (15) identical with the magnet exciting coil (2) quantity, the 4th side
End face (13b) is equipped with slot (14) identical with the magnet exciting coil (2) quantity, the inner wall and plug of the slot (14)
(15) front end is conductor, one end of the magnet exciting coil (2) on the first noumenon (12) and the second ontology (13) with it is described
Slot (14) connection, the other end are connect with the plug (15).
2. bridge cable electromagnetic flaw detection device as described in claim 1, it is characterised in that: the un-conducted magnetic material is with ABS
Wire rod goes out through 3D printer printing and making.
3. bridge cable electromagnetic flaw detection device as described in claim 1, it is characterised in that: the sleeve (1) is circular sleeve,
The sleeve (1) is equipped with two circles along the groove (11) that is uniformly arranged of circumferencial direction of the sleeve (1) inner wall, described in each circle
The quantity of groove (11) is n, wherein 20≤n≤30, each groove (11) is interior to be fixed with the search coil (3),
And the fixed search coil (3) is rectangular in the groove (11).
4. a kind of bridge cable nondestructive detection system, including bridge cable electromagnetic flaw detection device as described in claim 1, special
Sign is, the bridge cable nondestructive detection system further include:
Insulated gate bipolar transistor (4) is connected with the magnet exciting coil (2)；
Power supply unit (5) is connected with the insulated gate bipolar transistor (4)；
Computer (6) is connected with the insulated gate bipolar transistor (4)；And
Signal processing apparatus (7) is used to receive and process the damage signal that all search coil (3) issues, and will place
Damage signal after reason is sent to the computer (6).
5. bridge cable nondestructive detection system as claimed in claim 4, it is characterised in that: the power supply unit (5) includes storage
Energy capacitor (51) and DC power supply (52), described storage capacitor (51) one end are connected with the insulated gate bipolar transistor (4),
The other end is connected with the DC power supply (52)；The signal processing apparatus (7) includes filter (71), the signal being sequentially connected
Amplifier (72) and analog-digital converter (73), the filter (71) are connected with whole search coils (3), the modulus
Converter (73) is connected with the computer (6).
6. a kind of method using bridge cable nondestructive detection system detection bridge cable as claimed in claim 4, feature exist
In, method includes the following steps:
S1. the bridge cable electromagnetic flaw detection device is fixed on bridge cable, the magnet exciting coil (2) is made to be located at the bridge
The fragment position to be checked of beam drag-line；
S2. the computer (6) provides instruction, and controls the magnet exciting coil by the insulated gate bipolar transistor (4)
(2) frequency and pulsewidth of pulse current in；
S3. the signal processing apparatus (7) handles the damage signal received from the search coil (3), and sends
Give the computer (6)；
S4. the computer (6) damage signal that receives that treated, completes the detection of the bridge cable after analytical judgment.
7. the method for detection bridge cable as claimed in claim 6, it is characterised in that: the normal side of the magnet exciting coil (2)
To orthogonal with the normal direction of any one of search coil (3).
8. the method for detection bridge cable as claimed in claim 6, it is characterised in that: the signal processing apparatus (7) includes
Filter (71), signal amplifier (72) and the analog-digital converter (73) being sequentially connected, the filter (71) and whole institutes
It states search coil (3) to be connected, the analog-digital converter (73) is connected with the computer (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610533659.2A CN106093184B (en) | 2016-07-08 | 2016-07-08 | Bridge cable electromagnetic flaw detection device and its application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610533659.2A CN106093184B (en) | 2016-07-08 | 2016-07-08 | Bridge cable electromagnetic flaw detection device and its application |
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| CN106093184B true CN106093184B (en) | 2019-11-26 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102038B (en) * | 2017-06-12 | 2023-04-11 | 重庆交通大学 | Cable corrosion damage detection system and method based on equivalent series capacitance measurement |
| CN111413398B (en) * | 2020-04-15 | 2023-11-21 | 辽宁省交通规划设计院有限责任公司 | Device and method for detecting internal damage of hot-cast anchor head |
| CN111595933A (en) * | 2020-05-19 | 2020-08-28 | 广东荣骏建设工程检测股份有限公司 | Bridge inhaul cable internal steel wire corrosion broken wire detection system |
| CN113970554B (en) * | 2021-11-03 | 2024-06-07 | 重庆交通大学 | Cable defect detection device and cable defect detection method |
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