CN209745874U - Draw hoist cable defect detecting device based on magnetic shielding - Google Patents
Draw hoist cable defect detecting device based on magnetic shielding Download PDFInfo
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- CN209745874U CN209745874U CN201920617376.5U CN201920617376U CN209745874U CN 209745874 U CN209745874 U CN 209745874U CN 201920617376 U CN201920617376 U CN 201920617376U CN 209745874 U CN209745874 U CN 209745874U
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Abstract
The utility model discloses a draw hoist cable defect detecting device based on magnetic screen, establish including being used for the cover and waiting to detect and draw the outer annular rigidity main cover of hoist cable, annular rigidity main cover includes shell and inner shell, presss from both sides between shell and the inner shell and is equipped with annular magnetic screen material layer, be provided with a set of or multiunit magnetic signal detection device in the interval corresponding to magnetic screen material layer place on the internal surface of annular rigidity main cover, every magnetic signal detection device of group includes along the same circumference cross section area circumference evenly distributed's of annular rigidity main cover internal surface a plurality of magnetic signal detection sensors, still include signal transceiver. The utility model discloses a magnetic signal detection sensor arranges the magnetism vacuum area that magnetic screen material layer formed in, therefore the magnetic signal that magnetic signal detection sensor detected draws the magnetic signal of hoist cable self for waiting to detect, has reduced external magnetic field and has drawn the influence that the disconnected silk magnetism of hoist cable internal corrosion detected.
Description
Technical Field
The utility model belongs to the technical field of civil engineering bridge construction draws hoist cable durability, security detection, specifically be a draw hoist cable defect detecting device based on magnetic screen.
Background
With the development of society, the traffic infrastructure of China is more perfect and the scale is more huge, so that the problems of maintenance and detection of the built bridge are brought. The corrosion and the wire breakage of the steel stranded wires and the steel wires inside the cable-stayed bridge and the suspension bridge are one of main diseases, so that the bearing capacity of the cable-stayed bridge is reduced, the safety coefficient is reduced, and even the cable-stayed bridge is broken in serious conditions, so that the safety of the bridge structure is influenced. Therefore, the detection of defects and diseases in the pull sling is very necessary.
At present, aiming at the problems of cracking and internal corrosion and wire breakage of a pull sling protective sleeve, although partial automatic detection equipment exists, the application range is not wide due to the limitation of factors such as higher price, single function and the like. The detection technology for the defects of the pull sling based on the spontaneous magnetic leakage omits the step of an active magnetization component, and has the characteristics of high diagnosis speed, simple operation, low price and portable equipment in local detection. However, the technology for detecting corrosion and wire breakage of the pull sling based on metal magnetic sensing has the problem of low detection precision due to the influence of an environmental magnetic field.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, the utility model discloses the technical problem that needs to solve is: how to provide a draw hoist cable defect detection device based on magnetic screen that can reduce external environment magnetic field to drawing hoist cable internal corrosion broken string magnetism detection influence.
In order to solve the technical problem, the utility model discloses a following technical scheme:
The utility model provides a draw hoist cable defect detecting device based on magnetic screen, is including being used for the cover to establish the annular rigidity main cover that waits to detect to draw outside the hoist cable, annular rigidity main cover includes shell and inner shell, the shell with press from both sides between the inner shell and be equipped with annular magnetic screen material layer, correspond on the internal surface of annular rigidity main cover be provided with a set of or multiunit magnetic signal detection device in the interval of magnetic screen material layer place, every group magnetic signal detection device includes the edge a plurality of magnetic signal detection sensors of the regional circumference evenly distributed of the same circumference cross section in annular rigidity main cover internal surface still include signal transceiver, signal transceiver sets up in the annular rigidity main cover and with magnetic signal detection sensor carries out data transmission and connects.
Therefore, when the pull sling is detected, the annular rigid main cover is sleeved outside the pull sling to be detected, and a magnetic vacuum area is formed in the area where the magnetic shielding material layer is located by the arranged magnetic shielding material layer, so that the influence of an external environment magnetic field on the magnetic signal of the pull sling to be detected is reduced. Meanwhile, one or more groups of magnetic signal detection devices are arranged in the interval corresponding to the magnetic shielding material layer on the inner surface of the annular rigid main cover, each group of magnetic signal detection devices also comprises a plurality of magnetic signal detection sensors which are uniformly distributed along the same circumferential section area of the inner surface of the annular rigid main cover in the circumferential direction, magnetic signals can be simultaneously detected at a plurality of positions in the length direction of the sling to be detected and a plurality of positions on the same circumference, and the magnetic signals detected by the magnetic signal detection sensors are transmitted to the signal transceiver, so that the detection efficiency can be effectively improved through multi-point simultaneous detection, on the other hand, as the magnetic signal detection sensors are also arranged in a magnetic vacuum area formed by the magnetic shielding material layer, the magnetic signals detected by the magnetic signal detection sensors are the magnetic signals of the sling to be detected, and the external magnetic field of the ferromagnetic new materials comprising adjacent pulling slings, anchor heads and the like is reduced, the influence on the magnetic detection of corrosion and wire breakage in the pull sling improves the detection accuracy. Therefore, the scheme can reduce the influence of an external environment magnetic field on the magnetic detection of corrosion and wire breakage in the pull sling.
preferably, one or more groups of image acquisition devices are further arranged in the interval corresponding to the magnetic shielding material layer on the inner surface of the annular rigid main cover, each group of image acquisition devices comprises a plurality of image collectors which are uniformly distributed along the same circumferential section area of the inner surface of the annular rigid main cover in the circumferential direction, and the image collectors are in data transmission connection with the signal transceiver.
Like this, can treat simultaneously and detect a plurality of positions that draw hoist cable length direction and a plurality of positions on the same circumference and carry out the collection of image, can effectively improve image acquisition's efficiency and precision through the multiple spot simultaneous acquisition.
Preferably, a group of the image capturing devices corresponds to a group of the magnetic signal detecting devices, and a plurality of the image capturing devices in the group of the image capturing devices are configured to capture images of the detection regions of the magnetic signal detecting sensors at corresponding positions.
Therefore, the image collector collects images of the pull sling in the detection area of the magnetic signal detection sensor, and the magnetic signal detected by the magnetic signal detection sensor corresponds to the image of the detection position collected by the image collector, so that the corrosion and wire breakage condition in the pull sling can be judged more intuitively and accurately.
Preferably, the mobile terminal further comprises a signal processing device which is in data transmission connection with the signal transceiver.
Like this, signal transceiver further transmits the signal processing device again with the magnetic signal of received magnetic signal detection sensor and the image signal that image collector gathered, and signal processing device handles the data of receiving, can make the more directly perceived convenient corruption broken silk condition of drawing the hoist cable of testing personnel carry out analysis and processing.
preferably, the inner surfaces of the two end sides of the annular rigid main cover are provided with cable climbing crawler devices which can be clamped on the outer surface of the pull sling and drive the detection device to move along the surface of the pull sling.
Like this, through setting up climbing cable crawler attachment, after some part that magnetic signal detection sensor was to drawing the hoist cable detects the completion, drive detection device through climbing cable crawler attachment and move along drawing hoist cable surface, make detection device move to the hoist cable department that draws that has not detected yet, with this realization that can be convenient to whole magnetism detection of drawing the inside disconnected silk of corrosion of hoist cable, crawler-type design can increase climbing cable crawler attachment simultaneously and wait to detect the area of contact who draws the hoist cable, guarantee that climbing cable crawler attachment is according to waiting to detect of established route and draw hoist cable surface to move.
preferably, the climbing cable crawler device comprises a plurality of climbing cable crawler wheels which are circumferentially and uniformly distributed, and a servo motor which drives the climbing cable crawler wheels.
Like this, drive through servo motor and climb cable crawler wheel and remove along drawing the hoist cable, a plurality of climbing cable crawler wheels along the surface of circumference equipartition centre gripping drawing the hoist cable, increase climbing cable crawler attachment and the area of contact who draws the hoist cable, guarantee that climbing cable crawler attachment waits to draw hoist cable surface to remove according to established route.
Preferably, the climbing cable crawler wheel is connected with the inner surface of the annular rigid main cover through an elastic rod, and the elastic force of the elastic rod is along the radial direction of the annular rigid main cover, so that the climbing cable crawler wheel can be tightly attached to the pulling sling under the action of the elastic force of the elastic rod.
like this, through setting up the elastic rod for the climbing cable athey wheel has great laminating power under the effect of elastic rod and wait to detect to draw between the hoist cable, has further guaranteed to move the in-process climbing cable athey wheel and wait to detect to draw reliable contact between the hoist cable, makes climbing cable athey wheel wait to detect according to established route all the time and draw the hoist cable surface and remove.
Preferably, the magnetic shielding material layer is made of permalloy materials.
Therefore, the permalloy has the greatest characteristic of high weak magnetic field permeability, so that a magnetic vacuum area can be better generated in a detection area according to the magnetic shielding principle, and the detection accuracy is further improved.
Preferably, the end faces of two sides of the annular rigid main cover are also provided with cleaning brushes, and one faces of the cleaning brushes for cleaning can be in contact with the surface of the sling to be detected.
Like this, through setting up the cleaning brush, at the in-process that the cable climbing crawler attachment moved along waiting to detect the pull sling, the cleaning brush on the terminal surface of annular rigidity main boot both sides can be used to clean the surface that pulls the sling, guarantees to await measuring the cleanliness that pulls the sling surface.
Preferably, the magnetic signal detection sensor and the image collector are both detachably mounted on the inner surface of the annular rigid main cover.
Therefore, the magnetic signal detection sensor and the image collector can be conveniently detached and installed on the annular rigid main cover, and the detection requirements of detecting the pull sling under different conditions are met.
drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the distribution of the leakage magnetic field of a defective ferromagnetic material;
FIG. 2 is a schematic view of a magnetic shield;
FIG. 3 is a plan view of the structure of an embodiment of the present invention;
Fig. 4 is a structural sectional view of an embodiment of the present invention.
Description of reference numerals: the device comprises a pull sling 1, an annular rigid main cover 2, a magnetic shielding material layer 3, a magnetic signal detection sensor 4, a camera 5, a signal receiving and transmitting device 6, a climbing crawler wheel 7, a cleaning brush 8, an elastic rod 9, an annular rigid main cover hinge joint 21 and an opening 22 of the annular rigid main cover.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
the utility model discloses a detect mainly based on spontaneous magnetic leakage technique to consider the magnetic shielding phenomenon, realize the detection to drawing the hoist cable defect.
H e H B H B H e H e H d H d =H B H e H p H d H H e H d H p H=H e +H d +H p The basic principle of the spontaneous magnetic flux leakage detection of the ferromagnetic material is as follows: as shown in fig. 1, under the combined action of the environmental magnetic field He and the load, the ferromagnetic material generates spontaneous magnetization and forms an induced magnetic field HB, which is also called a demagnetizing field and is denoted by Hd because the direction of the induced magnetic field HB is substantially opposite to or opposite to the direction of the environmental magnetic field magnetization He, and the He is weakened, and Hd = HB; as shown in fig. 1, after a defect occurs in a ferromagnetic material, an inhomogeneous magnetization field is formed at the defect under the combined action of an environmental magnetic field He and a load, so that an internal magnetic field of the material leaks to a surface of the material, and a leakage magnetic field Hp is generated on the surface of the material, wherein the direction of the leakage magnetic field is opposite to the direction of a demagnetization field Hd of the material. For this reason, it is known that the magnetic field H actually measured on the surface of the ferromagnetic material is a result of vector superposition of the ambient magnetic field He, the demagnetizing field Hd, and the leakage magnetic field Hp, that is, H = He + Hd + Hp.
BWhen simultaneously considering the magnetic shielding effect: as shown in fig. 2, magnetic shielding means that two media with different magnetic permeability are put into a magnetic field, and the magnetic field changes abruptly at the interface of the two media, and the magnitude and direction of the magnetic induction B change, namely, the magnetic induction line is refracted. When the magnetic induction lines enter the material with high magnetic permeability from air, the deviation of the magnetic induction lines from the normal line is large, so that the magnetic induction lines have strong convergence action, and the magnetic shielding is formed.
As shown in the attached drawings 3 and 4, the magnetic shielding-based sling defect detection device comprises an annular rigid main cover 2 which is used for being sleeved outside a sling 1 to be detected, wherein the annular rigid main cover 2 comprises an outer shell and an inner shell, an annular magnetic shielding material layer 3 is clamped between the outer shell and the inner shell, one or more groups of magnetic signal detection devices are arranged on the inner surface of the annular rigid main cover 2 corresponding to the interval of the magnetic shielding material layer 3, each group of magnetic signal detection devices comprises a plurality of magnetic signal detection sensors 4 which are uniformly distributed along the same circumferential section area of the inner surface of the annular rigid main cover 2 in the circumferential direction, and the magnetic shielding-based sling defect detection device also comprises a signal transceiver 6, and the signal transceiver 6 is arranged in the annular rigid main cover 2 and is in data transmission connection with the magnetic signal detection.
Like this, when detecting pulling sling 1, establish annular rigidity main cover 2 cover and wait to detect and pull outside sling 1, utilize the magnetic screen material layer 3 that sets up to form the magnetic vacuum region in the region at magnetic screen material layer 3 place to reduce external environment magnetic field and treat to detect the influence of pulling sling 1 self magnetic signal. Meanwhile, one or more groups of magnetic signal detection devices are arranged in the inner surface of the annular rigid main cover 2 corresponding to the region where the magnetic shielding material layer 3 is located, each group of magnetic signal detection devices also comprises a plurality of magnetic signal detection sensors 4 which are uniformly distributed along the circumference of the same circumferential section area of the inner surface of the annular rigid main cover 2, magnetic signals can be detected at a plurality of positions in the length direction of the sling 1 to be detected and a plurality of positions on the same circumference at the same time, the magnetic signals detected by the magnetic signal detection sensors 4 are transmitted to the signal transceiver 6, and the detected magnetic signals are transmitted to the outside by the signal transceiver 6 so as to be received by other equipment and used as source information for detecting and analyzing defects of the sling; on the one hand can effectively improve the efficiency that detects through the multiple spot while detecting like this, on the other hand, because magnetic signal detection sensor 4 also arranges in the magnetism vacuum region that magnetic shielding material layer 3 formed in, the magnetic signal that consequently magnetic signal detection sensor 4 detected is for waiting to detect the magnetic signal who draws hoist cable 1 self, has reduced the external magnetic field including ferromagnetic new materials such as adjacent hoist cable 1 and anchor head of drawing, to drawing the influence that the broken silk magnetism of internal corrosion of hoist cable 1 detected, has improved the accuracy that detects. Therefore, the scheme can reduce the influence of the external environment magnetic field on the magnetic detection of corrosion and wire breakage in the pull sling 1.
In this embodiment, one or more sets of image capturing devices are further disposed on the inner surface of the annular rigid main cover 2 corresponding to the region where the magnetic shielding material layer 3 is located, each set of image capturing device includes a plurality of image capturing devices circumferentially and uniformly distributed along the same circumferential cross-sectional area on the inner surface of the annular rigid main cover 2, and the image capturing devices are connected with the signal transceiver 6 in a data transmission manner, in this embodiment, the image capturing devices are cameras 5.
Like this, can treat simultaneously and detect a plurality of positions that draw 1 length direction of hoist cable and a plurality of positions on the same circumference and carry out the collection of image, can effectively improve image acquisition's efficiency and precision through the multiple spot simultaneous acquisition.
In the present embodiment, a group of image capturing devices corresponds to a group of magnetic signal detecting devices, and a plurality of image capturing devices in the group of image capturing devices are used for capturing images of the detection sections of the magnetic signal detecting sensors 4 at the corresponding positions.
Like this, carry out the collection of image through the image collector to the hoist cable 1 that draws in the magnetic signal detection sensor 4 detection interval, like this, the magnetic signal that detects through magnetic signal detection sensor 4 corresponds with the image of the detection department that the image collector gathered, can judge the disconnected silk condition of corrosion to drawing hoist cable 1 inside more directly perceived accurate.
In this embodiment, the device further comprises a signal processing device connected with the signal transceiver 6 for data transmission.
Thus, the signal transceiver 6 further transmits the received magnetic signal of the magnetic signal detection sensor 4 and the image signal collected by the image collector to the signal processing device, and the signal processing device processes the received data, so that a tester can analyze and process the corrosion and wire breakage condition in the pull sling 1 more intuitively and conveniently.
In this embodiment, the inner surfaces of the two ends of the annular rigid main cover 2 are provided with climbing caterpillar devices which can be clamped on the outer surface of the pull sling 1 and drive the detection device to move along the surface of the pull sling 1.
Like this, through setting up climbing cable crawler attachment, after some part that magnetic signal detection sensor 4 is to drawing hoist cable 1 detects the completion, drive detection device through climbing cable crawler attachment and follow and draw hoist cable 1 surface removal, make detection device move to drawing hoist cable 1 department that has not detected yet, realization that with this can be convenient is to whole magnetic detection who draws 1 internal corrosion broken filament of hoist cable, crawler-type design can increase climbing cable crawler attachment and wait to detect the area of contact who draws hoist cable 1 simultaneously, guarantee that climbing cable crawler attachment waits to detect according to established route and draw hoist cable 1 surface removal.
In this embodiment, the crawler device includes a plurality of crawler wheels 7 evenly distributed in the circumferential direction, and a servo motor for driving the crawler wheels 7.
Like this, drive through servo motor and climb cable athey wheel 7 and remove along drawing hoist cable 1, a plurality of climbing cable athey wheels 7 along circumference equipartition centre gripping on the surface of drawing hoist cable 1, increase climbing cable crawler attachment and the area of contact who draws hoist cable 1, guarantee that climbing cable crawler attachment waits to detect according to established route and draw hoist cable 1 surface to remove.
In this embodiment, the climbing crawler wheel 7 is connected to the inner surface of the annular rigid main housing 2 through an elastic rod 9, and the elastic force of the elastic rod 9 is along the radial direction of the annular rigid main housing 2, so that the climbing crawler wheel 7 can be tightly attached to the pull rope 1 by the elastic force of the elastic rod 9.
Like this, through setting up elastic rod 9 for climbing cable athey wheel 7 has great laminating power under elastic rod 9's effect and wait to detect to draw between hoist cable 1, has further guaranteed to move the reliable contact between in-process climbing cable athey wheel 7 and waiting to detect to draw hoist cable 1, makes climbing cable athey wheel 7 wait to detect according to established route all the time and draw hoist cable 1 surface to move.
In the present embodiment, the magnetic shield material layer 3 is made of permalloy material.
Therefore, the permalloy has the greatest characteristic of high weak magnetic field permeability, so that a magnetic vacuum area can be better generated in a detection area according to the magnetic shielding principle, and the detection accuracy is further improved.
In this embodiment, the end faces of the two sides of the annular rigid main cover 2 are further provided with cleaning brushes 8, and the cleaning brushes 8 can be used for cleaning one side to be in contact with the surface of the sling 1 to be detected.
Like this, through setting up cleaning brush 8, at the in-process that the crawler attachment of climbing cable moved along waiting to detect and draw hoist cable 1, cleaning brush 8 on the terminal surface of annular rigidity main housing 2 both sides can be used to clean the surface that draws hoist cable 1, guarantees the cleanliness on the surface of the hoist cable 1 that draws that awaits measuring.
In this embodiment, the magnetic signal detection sensor 4 and the image collector are both detachably mounted on the inner surface of the annular rigid main cover 2.
Therefore, the magnetic signal detection sensor 4 and the image collector can be conveniently detached and installed on the annular rigid main cover 2, and the detection requirement of the suspension cable 1 to be detected under different conditions is met.
In this embodiment, the annular rigid main cover 2 is in a structure form that one side is hinged and the other side is open, wherein the right side is the hinged part 21 of the annular rigid main cover, and the left side is the opening 22 of the annular rigid main cover, when in use, two sides of the opening of the annular rigid main cover 2 can rotate around the hinged part 21 of the annular rigid main cover, so that the pull sling 1 extends into the annular rigid main cover 2 from the opening 22 of the annular rigid main cover, then the opening 22 of the annular rigid main cover is buckled, and the annular rigid main cover 2 can be matched with the outer diameter of the pull sling with a certain size range through the elastic deformation of the elastic rod 9.
In order to achieve the purpose of detecting the internal corrosion condition of the pull sling, the operation method of the detection device comprises the following steps:
(1) Opening the annular rigid main cover 2, adjusting the diameter enclosed by the annular rigid main cover 2 according to the measured diameter of the pull sling 1, sleeving the annular rigid main cover on the pull sling 1 and closing the annular rigid main cover, and adjusting the elastic rod 9 to enable the climbing cable crawler device 7 to be tightly attached to the pull sling 1 to prevent the climbing cable crawler device from sliding off;
(2) The environment magnetic field is arranged outside the detection device, so that magnetism is generated in the pull sling under the action of the environment magnetic field, the environment magnetic field can be generated in the pull sling under the action of the permanent magnet magnetic field by arranging permanent magnets at two ends of the pull sling, and other modes capable of enabling the interior of the pull sling to generate magnetism can also be adopted;
(3) Opening the magnetic signal detection sensor 4, the camera 5, the signal transceiving device 6 and the signal processing device, and establishing connection with ground equipment to ensure real-time transmission of signals;
(4) Starting the cable climbing crawler device to move along the suspension cable 1 to be detected, and transmitting a detection magnetic signal and a transmission image in real time;
(5) Processing data by using a signal processing device according to the magnetic signals and the image information returned in real time, and accurately diagnosing the corrosion part and the corrosion degree of the pull sling 1;
(6) When the top of the pull sling 1 is reached, namely after detection is finished, the magnetic signal detection sensor 4, the camera 5, the signal transceiver 6 and the signal processing device are closed, and the detection device is returned.
This device magnetism detects signal sensor to drawing hoist cable 1 and carry out the magnetic signal detection of full aspect to through data transmission, will draw hoist cable 1 to transmit to ground through signal transceiver 6 in real time at the magnetic signal distribution image of different positions, so that accurate diagnosis department draws the corruption position and the degree of hoist cable 1.
H H d H p H=H d +H p The magnetic shielding material layer made of permalloy is arranged in the device, and aims to generate a magnetic vacuum area in a detection part through a magnetic shielding principle, so that the interference of the external environment on magnetic detection is reduced, the influence of ferromagnetic materials such as adjacent guys and anchor heads on a detection result is reduced, namely, a magnetic field H obtained through actual measurement is a result of vector superposition of a demagnetizing field Hd and a leakage magnetic field Hp, namely H = Hd + Hp.
the device makes accurate processing analysis on the defect position and corrosion condition of the bridge pull sling 1 through a magnetic vacuum area created by a magnetic shielding material layer based on the spontaneous magnetic flux leakage phenomenon at the defect position of a ferromagnetic material. The device is mainly applied to the regular detection of the bridge, does not interrupt traffic, does not influence the bridge structure and the environment, is economic, lossless and safe, and accords with the concept of energy conservation and environmental protection.
Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a draw hoist cable defect detecting device based on magnetic screen, its characterized in that, including being used for the cover to establish the annular rigidity main cover of waiting to detect and drawing the hoist cable outside, annular rigidity main cover includes shell and inner shell, the shell with press from both sides between the inner shell and be equipped with annular magnetic screen material layer, correspond on the internal surface of annular rigidity main cover be provided with a set of or multiunit magnetic signal detection device in the interval of magnetic screen material layer place, every group magnetic signal detection device includes the edge a plurality of magnetic signal detection sensors of the regional circumference evenly distributed of the same circumference cross section in annular rigidity main cover internal surface still include signal transceiver, signal transceiver set up in the annular rigidity main cover and with magnetic signal detection sensor carries out data transmission and connects.
2. the magnetic shielding-based draw sling defect detecting device as claimed in claim 1, wherein one or more groups of image collecting devices are further arranged on the inner surface of the annular rigid main cover in an interval corresponding to the magnetic shielding material layer, each group of image collecting devices comprises a plurality of image collectors which are circumferentially and uniformly distributed along the same circumferential section area on the inner surface of the annular rigid main cover, and the image collectors are in data transmission connection with the signal transceiver.
3. the magnetic shielding-based draw sling defect detecting device as claimed in claim 2, wherein a group of said image capturing devices corresponds to a group of said magnetic signal detecting devices, and a plurality of said image capturing devices in a group of said image capturing devices are used for capturing images of the detecting regions of said magnetic signal detecting sensors at corresponding positions.
4. The magnetic shield-based draw sling fault detection device as claimed in claim 2, further comprising a signal processing device in data transmission connection with said signal transceiver device.
5. The magnetic shielding-based draw sling defect detection device as claimed in claim 1, wherein the inner surfaces of the two end sides of the annular rigid main cover are provided with climbing caterpillar track devices which can clamp the outer surface of the draw sling and drive the detection device to move along the surface of the draw sling.
6. the magnetic shielding-based draw sling defect detecting device as recited in claim 5, wherein the crawler attachment comprises a plurality of crawler wheels evenly distributed in the circumferential direction, and a servo motor for driving the crawler wheels.
7. The magnetic shield-based pull sling defect detection device as claimed in claim 6, wherein the cable-climbing crawler wheel is connected with the inner surface of the annular rigid main cover through an elastic rod, and the elastic force of the elastic rod is along the radial direction of the annular rigid main cover, so that the cable-climbing crawler wheel can be tightly attached to the pull sling under the action of the elastic force of the elastic rod.
8. The magnetic shielding-based tensile sling defect detection device as claimed in claim 1, wherein said magnetic shielding material layer is made of permalloy.
9. The magnetic shielding-based draw sling defect detecting device as claimed in claim 1, wherein the end surfaces of the two sides of the annular rigid main cover are further provided with cleaning brushes, and the cleaning brush is capable of contacting with the surface of the draw sling to be detected.
10. The magnetic shield-based draw sling defect detection apparatus as claimed in claim 2, wherein said magnetic signal detection sensor and said image collector are both removably mounted on the inner surface of said annular rigid main housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920617376.5U CN209745874U (en) | 2019-04-30 | 2019-04-30 | Draw hoist cable defect detecting device based on magnetic shielding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920617376.5U CN209745874U (en) | 2019-04-30 | 2019-04-30 | Draw hoist cable defect detecting device based on magnetic shielding |
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| CN209745874U true CN209745874U (en) | 2019-12-06 |
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| CN201920617376.5U Active CN209745874U (en) | 2019-04-30 | 2019-04-30 | Draw hoist cable defect detecting device based on magnetic shielding |
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