CN104280452A - Wire rope defect scanning system based on circular array weak magnetic detection sensor - Google Patents
Wire rope defect scanning system based on circular array weak magnetic detection sensor Download PDFInfo
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Abstract
The invention provides a wire rope defect scanning system based on a circular array weak magnetic detection sensor, and belongs to the technical field of nondestructive testing. The wire rope defect scanning system comprises a linear guide rail scanning mechanism, a circular array weak magnetic detection sensor, a steel rope clamping assembly, a motion control unit and a data collection unit, wherein the linear guide rail scanning mechanism can carry with the circular array weak magnetic detection sensor to carry out uniform linear motion relative to a wire rope at controllable speed. The circular array weak magnetic detection sensor provided by the invention adopts helmholtz coils and high-sensitivity tunnel magnetoresistance elements which are evenly distributed along the circumference of the wire rope, so that the direct-current excitation power consumption is low, and no adsorption capacity action is generated on the wire rope; a flexible printed circuit board for welding the tunnel magnetoresistance elements is adopted, so that the wire rope defect scanning system is small in volume and easy to bend, and is capable of achieving axial and circumferential positioning of wire fractures and abrasion; and the linear guide rail scanning mechanism and the wire rope clamping assembly can ensure the consistent lift-off distance between the weak magnetic detection sensor and the wire rope in the detection process.
Description
Technical field
The invention belongs to technical field of nondestructive testing, especially for the Non-Destructive Testing of cable wire, is a kind of cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column.
Background technology
Cable wire is generally twisted by many high-tensile steel wires and is coiled into stock, then is formed around cable core coiling by several rope strands.It has the advantages such as high tensile, low bending resistance and low shearing resistance, is widely used in each main industries of national economy and the departments such as coal, metallurgy, building, tourism.In use for various reasons, all kinds of defect of normal appearance, comprises the loss of cable wire material cross-section (LMA) and local defect (LF) to cable wire.The accident of these damage initiations of cable wire is by the crisis person and device security.Therefore, development cable wire defect Dynamic Non-Destruction Measurement, Obtaining Accurate defect information, carries out cable wire safety evaluation and proposes in time to remedy scheme, to ensure cable wire use safety, improves cable wire serviceable life, has important society and economic worth.
From 1906, First steel rope flow detector emerged so far in the world, had developed multiple nondestructive test method of wire rope, mainly comprised supercritical ultrasonics technology, electric vortex method and leakage method etc.Ultrasound wave is decayed serious in complicated cable wire and its propagation characteristic in cable wire is comparatively complicated, comparatively difficult to the extraction of flaw indication; Electric vortex method limits by skin effect, detects the degree of depth limited, generally can only detect cable wire cosmetic bug.Comparatively speaking, leakage method is comparatively ripe cable wire defect detecting technique, has that detection space resolution is high, the response time fast, can the advantage such as on-line checkingi.
The excitation mode of cable wire Magnetic Flux Leakage Inspecting is divided into passive excitation and active excitation.The Ru-Fe-Mn permanent magnet of the strong magnetic force of the many employings of passive excitation as excitation source, and adopts heavy yoke as magnetic conductor.The profile of the absorption affinity that permanent magnet is powerful and sensor both bulk, makes sensor and cable wire be difficult to successfully relative uniform motion, and is difficult to the consistance ensureing sensor and cable wire lift-off distance.Traditional active exciting method need adopt stabilized voltage supply to pass into larger current in field coil, and coil heating effect is serious, is not easy to practical application.
In the process of cable wire defects detection, the lift-off distance of sensor and cable wire to be measured should be consistent, and traditional both maintenances lift-off is that the method can cause the wearing and tearing of guide wheel or piston shoes by installing guide wheel or piston shoes apart from consistent method.The cable wire drawing process that Chinese patent CN202994584U " a kind of simple and easy cable wire stretching device " proposes can be used for the device designing pretension cable wire, designs the cable wire defect scanning system of Entirely contactless and constant lift-off distance on this basis.
Summary of the invention
The cable wire defect scanning system of the low-intensity magnetic field based on the weak magnetic measurement sensor of Circle-Array column that the object of the present invention is to provide a kind of simulated field in laboratory conditions to detect, low-power consumption.System not only has high resolution and high sensitivity, and the strong magnetic adsorbability of passive detection and conventional active can be avoided to detect the heating weakness huge with power-supply unit, the at the uniform velocity relative motion between cable wire and sensor can be realized, guarantee the consistance of both lift-off distances.
The present invention proposes the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column, and it comprises: linear guide rail type scanning mechanism, the weak magnetic measurement sensor of Circle-Array column, cable wire clamp assemblies, motion control unit and data acquisition unit.
Described linear guide rail type scanning mechanism is used for regulating system level and carries the weak magnetic measurement sensor of Circle-Array column and make itself and cable wire generation relative motion;
The weak magnetic measurement sensor of described Circle-Array column is arranged on linear guide rail type scanning mechanism, for uniform magnetization detected steel cable vertically, shielding environmental magnetic field and detection cable wire flaw indication;
Described cable wire clamp assemblies is used for pretension and fixing tightwire;
Described motion control unit is communicated with the weak magnetic measurement sensor of Circle-Array column with linear guide rail type scanning mechanism with data collecting card by motion control card respectively with data acquisition unit, the flaw indication that motion and processes sensor for controlling guide rail gather.
Especially, described linear guide rail type scanning mechanism comprises horizontal adjustment base, XY two axle movement guide rail and steel cable fixation device mounting rail.
Described horizontal adjustment base is assembled by angle seat and aluminium section bar.Wherein have four aluminium section bars vertically placed to be individually fixed on the angle seat of four horizon adjustables, two pairs of aluminium section bars are fixed in the middle part of four aluminium section bars vertically placed by corner connector, and top structure is the same.Horizontal adjustment base is used for regulating system level.
Three guide rails that described XY two axle movement guide rail is assembled by " work " font and two motors form.Wherein two closed slides form X kinematic axis, and guide rail vertical with it forms Y kinematic axis.The closed slide of X-axis is fixed on horizontal adjustment base top two aluminium section bars, and Y-axis guide rail is fixed on two slide units of X-axis guide rail.Two motors are connected with one end of two axis rails respectively, and wherein X-axis guide rail realizes being synchronized with the movement by transmission shaft.Two axle movement guide rail is for carrying the weak magnetic measurement sensor of Circle-Array column and realizing the relative motion of sensor and cable wire.
Described steel cable fixation device mounting rail paralleled by X axis guide rail, is fixedly mounted on horizontal adjustment base top, for installing steel cable fixation device.
Especially, the weak magnetic measurement sensor of described Circle-Array column comprises: sensor holder, Helmholtz coils, tunnel magnetoresistive probe, Split type magnetic shielding case, printed circuit board.
Described sensor holder is made up of base and clamp of sensor.Described base is fixed on Y-axis guide rail slide unit, and its middle part has all-wing aircraft connected in star, and wherein both wings groove is used for fixed excitation structure, and central slot is used for fixation of sensor fixture.Described clamp of sensor divides upper and lower two parts, and wherein the latter half is the rectangular parallelepiped having half slot, is fixed in the groove in the middle part of base bottom it, and the first half is the semicircular structure of band ears, and its ears structure and the latter half are bolted.Sensor holder is for clamping Split type magnetic shielding case and fixing Helmholtz coils.
Described Split type magnetic shielding case is two symmetrical shell structures, and ringwise, there is annular end cap at two ends to its xsect.Split type magnetic shielding case for shielding environmental magnetic field, at nearly zero magnetic field space of shielding cavity internal structure.
Described Helmholtz coils is made up of two toroid windings and lithium battery.Two toroid windings are enclosed within shielding construction two ends respectively and are fixed in the both wings groove of base, and both connect and direction of current is consistent.Helmholtz coils is used for magnetizing the cable wire passed from its center vertically.
Described tunnel magnetoresistive probe is made up of tunnel magnetoresistance element and sensor set collar.Described sensor set collar is tubular structure; itself and Split type magnetic shielding case inner chamber transition fit; its outer wall is uniformly distributed circumferentially N (2≤N≤16) individual groove; its inwall is uniformly distributed N number of shallow slot; shallow slot be used for rubber seal protection flexible circuit board, shallow slot corresponding with unit with grooves in outer wall position and be interconnected for pass flexible circuit board.Described tunnel magnetoresistance element is uniformly distributed and rubber seal is fixed in the groove of sensor set collar.
Described printed circuit board is made up of rigid printed circuit plate (PCB) and flexible circuit board (FPC).Described rigid printed circuit plate is installed on the base of sensor holder, and it turns 1V circuit by 3 ~ 12V and signal converting circuit is formed, for powering for tunnel magnetoresistance element and sending detection signal to data collecting card.Described flexible circuit board one end welding tunnel magnetoresistance element, one end connects rigid printed circuit plate, and it is for for tunnel magnetoresistance element electric energy transmitting with to rigid printed circuit plate output detections signal.
Especially, described cable wire clamp assemblies comprises: cable pre-tight apparatus and steel cable fixation device.
Described cable pre-tight apparatus is made up of feed-through hydraulic pump, baffle plate, rigid base and anchor head, and it is for pretension cable wire, and stretching cable wire is to collimating status.
Described steel cable fixation device uses in pairs, and it is made up of base, support and set bolt.Base is fixedly mounted on steel cable fixation device mounting rail.Four set bolts pass sensing center from " returning " shape support four direction respectively.Steel cable fixation device is for adjusting cable wire locus and gripping cable wire to be measured.
Described sensor holder adopts pmma material, and described Helmholtz coils adopts enamel covered wire material, and described Split type magnetic shielding case adopts low-carbon steel material, and described sensor set collar adopts pmma material.
Described sensor holder, Helmholtz coils, split type shielding case, sensor set collar and cable wire are all coaxial.
Internal diameter 1mm ~ the 2mm less of the internal diameter of split type magnetic shielding shell end cap of described sensor set collar, 1mm ~ 2mm larger than detected steel cable diameter.Its inside surface is uniformly distributed circumferentially N number of dark 0.5mm ~ 1mm, wide 1mm ~ 2mm and extends to shallow slot in the middle part of it from sensor support one end, and shallow slot is relative with unit with grooves in outer wall position and be interconnected.
Described motion control unit is for controlling the motion of line slideway.Described data acquisition unit is used for the signal of receiving sensor transmission and exports signal after process to computing machine.Described computing machine is by the speed of motion control card control guide rail uniform motion and gather flaw indication by data collecting card, and by the process to cable wire defect and magnetic leakage signal, judge that cable wire has zero defect and calculates position and the size of defect, complete the qualitative detection to cable wire and quantitative measurment.
The present invention is by adopting technique scheme, following advantage and beneficial effect can be obtained: the present invention is by the level of Level tune base regulating system, by cable wire clamp assemblies pretension and fixing tightwire, ensure that one of cable wire and Circle-Array column weak magnetic measurement sensor lift-off distance makes peace and avoids both contact wears well.The present invention effectively ensure that the at the uniform velocity relative motion of the weak magnetic measurement sensor of Circle-Array column and cable wire by motion control unit and motion guide rail.The present invention adopts the Helmholtz coils of tunnel magnetoresistance element and lithium battery power supply, effectively reduces the absorption affinity of the weak magnetic measurement sensor of Circle-Array column and cable wire, overcomes the heating of active excitation and the huge problem of power-supply unit.
Accompanying drawing explanation
The cable wire defect scanning system construction drawing based on the weak magnetic measurement sensor of Circle-Array column that Fig. 1 provides for the embodiment of the present invention;
The assembling of the cable wire defect scanning system based on the weak magnetic measurement sensor of the Circle-Array column schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The weak magnetic measurement sensor schematic diagram of cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 3 provides for the embodiment of the present invention;
The weak magnetic measurement sensor radial cross-section of cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 4 provides for the embodiment of the present invention;
The axial cut-open view of the weak magnetic measurement sensor of the cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 5 provides for the embodiment of the present invention;
The cable wire defect scanning system steel cable fixation device schematic diagram based on the weak magnetic measurement sensor of Circle-Array column that Fig. 6 provides for the embodiment of the present invention;
The assembling of the cable wire defect scanning system coaxial based on the weak magnetic measurement sensor of the Circle-Array column schematic diagram that Fig. 7 provides for the embodiment of the present invention.
In figure:
1, linear guide rail type scanning mechanism, 2, the weak magnetic measurement sensor of Circle-Array column, 3, cable wire clamp assemblies, 4, motion control unit, 5, data acquisition unit, 6, horizontal adjustment base, 6-1, angle seat, 6-2, aluminium section bar, 7, XY two axle movement guide rail, 7-1, X-axis guide rail, 7-2, Y-axis guide rail, 7-3, motor, 8, steel cable fixation device mounting rail, 9, steel cable fixation device, 9-1 firm banking, 9-2, support, 9-3, set bolt, 10, cable pre-tight apparatus, 10-1, feed-through hydraulic pump, 10-2, baffle plate, 10-3, rigid base, 10-4, anchor head, 11, sensor holder, 11-1 base, 11-2, clamp of sensor, 12, Split type magnetic shielding case, 13, Helmholtz coils, 14, tunnel magnetoresistive is popped one's head in, 14-1 tunnel magnetoresistance element, 14-2, sensor set collar, 15, printed circuit board, 15-1, rigid printed circuit plate PCB, 15-2, flexible circuit board FPC, 16, cable wire.
Embodiment
The present invention is carried the weak magnetic measurement sensor of Circle-Array column by the motion guide rail be arranged on horizontal adjustment base and is carried out defect scanning along the cable wire that pretension is fixing.The present invention effectively can ensure the lift-off distance between sensor and cable wire, and relative motion between the two, greatly reduces sensor to the absorption affinity of cable wire, reduction sensor weight, shielding environment magnetic interference, improves the magnetized homogeneity of cable wire, and to the detection and location of defect and quantitative accuracy.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, the explanation of embodiment, in order to help to understand the present invention, does not form limitation of the invention.
The cable wire defect scanning system architecture schematic diagram based on the weak magnetic measurement sensor of Circle-Array column that Fig. 1 provides for the embodiment of the present invention.
Cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column in the present embodiment comprises: the weak magnetic measurement sensor 2 of linear guide rail type scanning mechanism 1, Circle-Array column, cable wire clamp assemblies 3, motion control unit 4 and data acquisition unit 5.Described linear guide rail type scanning mechanism 1 comprises: horizontal adjustment base 6, XY two axle movement guide rail 7 and steel cable fixation device mounting rail 8; The weak magnetic measurement sensor 2 of described Circle-Array column comprises: sensor holder 11, Split type magnetic shielding case 12, Helmholtz coils 13, tunnel magnetoresistive probe 14 and printed circuit board 15; Described cable wire clamp assemblies 3 comprises steel cable fixation device 9 and cable pre-tight apparatus 10.
Described horizontal adjustment base 6 is for fixing XY two axle movement guide rail 7 and steel cable fixation device mounting rail 8; Described XY two axle movement guide rail 7 is for the weak magnetic measurement sensor 2 of fixed-circumference array; Described steel cable fixation device mounting rail 8 is for installing fixing tightwire stationary installation 9; Described sensor holder 11 is for fixing Split type magnetic shielding case 12 and Helmholtz coils 13; Described Helmholtz coils 13 is for the cable wire 16 to be measured of uniform magnetization vertically; Described Split type magnetic shielding case 12 is for shielding environmental magnetic field and fixing tunnel magnetoresistive probe 14; Tunnel magnetoresistive probe 14 is for detecting cable wire 16 defect; Described data acquisition unit 5 is for receiving the detection signal of process tunnel magnetoresistive probe 14; Described motion control unit 4 is for the motion of control XY two axle movement guide rail 7.
The assembling of the cable wire defect scanning system based on the weak magnetic measurement sensor of the Circle-Array column schematic diagram that Fig. 2 provides for the embodiment of the present invention;
Described horizontal adjustment base 6 is assembled by angle seat 6-1 and aluminium section bar 6-2, wherein four aluminium section bar 6-2 vertically placed are individually fixed on the angle seat 6-1 of four horizon adjustables, two couples of aluminium section bar 6-2 are fixed in the middle part of four aluminium section bar 6-2 vertically placed by corner connector, and four, top aluminium section bar 6-2 mounting means is the same.
Three guide rail 7-1 (7-2) that described XY two axle movement guide rail 7 is assembled by " work " font and two motor 7-3 form.Wherein two closed slide 7-1 form X kinematic axis, and guide rail 7-2 vertical with it forms Y kinematic axis.The closed slide 7-1 of X-axis is fixed on the aluminium section bar 6-2 of two, horizontal adjustment base 6 top, and Y-axis guide rail 7-2 is fixed on two slide units of X-axis guide rail 7-1.Two motor 7-3 are connected with one end of two axis rails respectively, and wherein X-axis guide rail 7-1 realizes being synchronized with the movement by transmission shaft.
Described steel cable fixation device mounting rail 8 paralleled by X axis guide rails assembling is fixed on horizontal adjustment base 6 top.
Described steel cable fixation device 9 is fixedly mounted on steel cable fixation device mounting rail 8, and steel cable fixation device 9 uses in pairs, and it is for adjusting the locus of cable wire 16 and fixing.
The weak magnetic measurement sensor 2 of described Circle-Array column is fixed on the slide block of Y-axis guide rail 7-2, and cable wire 16 passes from its center.
The weak magnetic measurement sensor schematic diagram of cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 3 provides for the embodiment of the present invention.Described sensor holder 11 is made up of base 11-1 and clamp of sensor 11-2.Described base 11-1 is fixed on Y-axis guide rail 7-2 slide unit, its middle part has all-wing aircraft connected in star, wherein both wings groove is used for fixing Helmholtz coils 13, central slot is used for fixation of sensor fixture 11-2, and there are groove for fixing rigid printed circuit plate 15-1 and screw thread in the side of its aerofoil profile groove.Described clamp of sensor 11-2 divides upper and lower two parts, and wherein the latter half is the rectangular parallelepiped having half slot, is fixed in the groove in the middle part of base 11-1 bottom it, and the first half is the semicircular structure of band ears, and its upper and lower two parts are bolted.
The upper and lower two parts of described clamp of sensor 11-2 coordinate the middle part of clamping Split type magnetic shielding case 12; Two coils of Helmholtz coils 13 are enclosed within the two ends of Split type magnetic shielding case 12 respectively and are fixed in the wing groove of base 11-1.
Described printed circuit board 15 is divided into rigid printed circuit plate (PCB) 15-1 and flexible circuit board (FPC) 15-2, FPC15-2 one end welding tunnel magnetoresistance element 14-1, one end connection PCB 15-1.Described PCB15-1 adopts 3V button cell as power supply and by reduction voltage circuit for tunnel magnetoresistance element 14-1 provides 1V DC voltage, and it is connected with data acquisition unit 5 with FPC15-2 respectively.
The weak magnetic measurement sensor radial cross-section of cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 4 provides for the embodiment of the present invention.Described sensor set collar 14-2 is tubular structure, itself and Split type magnetic shielding case 12 inner chamber transition fit, and its outer wall is uniformly distributed circumferentially N (N >=2) individual groove.Described tunnel magnetoresistance element 14-1 is uniformly distributed in the groove of sensor set collar 14-2.Described cable wire 16, sensor set collar 14-2, Split type magnetic shielding case 12, Helmholtz coils 13 and clamp of sensor 11-2 coaxially assemble.
The axial cut-open view of the weak magnetic measurement sensor of the cable wire defect scanning system circumference array based on the weak magnetic measurement sensor of Circle-Array column that Fig. 5 provides for the embodiment of the present invention.Two coils connected in series of described Helmholtz coils 13 and direction of current is consistent.Internal diameter 1mm ~ the 2mm less of the internal diameter of split type magnetic shielding shell 12 end cap of described sensor set collar 14-2,1mm ~ 2mm larger than detected steel cable 16 diameter.Its inside surface is uniformly distributed circumferentially N number of dark 0.5mm ~ 1mm, wide 1mm ~ 2mm extend to dark 0.5mm ~ 1mm in the middle part of it shallow slot from sensor support one end, and shallow slot is relative with unit with grooves in outer wall position and be interconnected.Described tunnel magnetoresistance element 14-1 is fixed on by rubber seal in the groove of sensor set collar 14-2; described FPC15-2 one end welding tunnel magnetoresistance element 14-1; one end connection PCB 15-1; it is communicated with the square hole of inside and outside wall groove through sensor set collar 14-2, and rubber seal is protected in the shallow slot of sensor set collar 14-2 inwall.
As shown in Figure 6, the cable wire defect scanning system steel cable fixation device schematic diagram based on the weak magnetic measurement sensor of Circle-Array column that provides for the embodiment of the present invention of Fig. 6.Described steel cable fixation device 9 is made up of firm banking 9-1, support 9-2 and set bolt 9-3.Firm banking 9-1 is fixedly mounted on steel cable fixation device mounting rail 8, and support 9-2 is assembled by " work " font and " returning " character form structure, and four set bolt 9-3 pass sensing center from " returning " shape support 9-2 four direction respectively.Cable wire 16 passes from " returning " font support 9-2 center, by turning bolt adjustable cable wire locus and the cable wire that is fixedly clamped.
As shown in Figure 7, the cable wire defect scanning system coaxial based on the weak magnetic measurement sensor of Circle-Array column that Fig. 7 provides for the embodiment of the present invention assembles schematic diagram.Described cable wire clamp assemblies 3 comprises steel cable fixation device 9 and cable pre-tight apparatus 10.Described cable pre-tight apparatus 10 is made up of feed-through hydraulic pump 10-1, baffle plate 10-2, rigid base 10-3 and anchor head 10-4.
Cable wire defect scanning system coaxial assembly method based on the weak magnetic measurement sensor of Circle-Array column is as follows: angle seat 6-1 adjustment System level, the weak magnetic measurement sensor 2 of Circle-Array column is by directly over Y-axis guide rail movement to steel cable fixation device mounting rail 8, cable pre-tight apparatus 10 is installed on horizontal adjustment base 6 both sides, and " returning " shape support 9-2 of anchor head 10-4, baffle plate groove 10-2, feed-through hydraulic pump 10-1, steel cable fixation device and the weak magnetic measurement sensor 2 of Circle-Array column are centrally located on straight line.Cable wire 16 is stretched to collimating status by cable pre-tight apparatus 10, and steel cable fixation device 9 adjusts the locus of cable wire 16 by four set bolt 9-3 and is fixedly clamped.
Claims (7)
1. based on the cable wire defect scanning system of the weak magnetic measurement sensor of Circle-Array column, it is characterized in that, it comprises: linear guide rail type scanning mechanism, the weak magnetic measurement sensor of Circle-Array column, cable wire clamp assemblies, motion control unit and data acquisition unit;
The weak magnetic measurement sensor of described Circle-Array column is fixedly installed on linear guide rail type scanning mechanism, for measuring the magnetic field variation signal on cable wire; The cable pre-tight apparatus of cable wire clamp assemblies is installed on linear guide rail type scanning mechanism both sides, for pretension cable wire; The steel cable fixation device of cable wire clamp assemblies is fixedly installed on linear guide rail type scanning mechanism, for fixing tightwire position; Motion control unit is connected with linear guide rail type scanning mechanism, drives the weak magnetic measurement sensor of Circle-Array column to do linear uniform motion with setting speed cable wire relatively to be measured for controlling line slideway; Data acquisition unit is connected with the weak magnetic measurement sensor of Circle-Array column, for the multichannel magnetic field variation signal that the weak magnetic measurement sensor measurement of Real-time Collection Circle-Array column obtains.
2. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 1, it is characterized in that, described linear guide rail type scanning mechanism comprises: horizontal adjustment base, XY two axle movement guide rail and steel cable fixation device mounting rail;
Described horizontal adjustment base is assembled by angle seat and aluminium section bar, and it is for regulating system level and fixing line slideway;
Three guide rails that described XY two axle movement guide rail is assembled by " work " font and two motors form; Wherein two closed slides form X kinematic axis, and guide rail vertical with it forms Y kinematic axis; Y-axis guide rail is fixedly installed on two slide blocks of X-axis guide rail, and the weak magnetic measurement sensor of Circle-Array column is fixedly installed on the slide block of Y-axis guide rail; Motion control unit realizes the weak magnetic measurement sensor of Circle-Array column by control two spindle motor and complete set motion in XY plane;
Described steel cable fixation device mounting rail paralleled by X axis guide rail is fixedly mounted on horizontal adjustment base, for fixedly mounting steel cable fixation device.
3. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 1, it is characterized in that, the weak magnetic measurement sensor of described Circle-Array column comprises: sensor holder, Helmholtz coils, tunnel magnetoresistive probe, Split type magnetic shielding case, printed circuit board;
Described sensor holder is fixedly installed on Y-axis guide rail slide block, and it is for clamping Split type magnetic shielding case, fixing Helmholtz coils and rigid printed circuit plate;
Described Helmholtz coils is set in split type shielding case two ends and is fixed on the base of sensor holder, and it is by lithium battery power supply, for uniform magnetization detected steel cable vertically;
Described split type shielding case is used for fixing tunnel magnetoresistive probe and shielding environmental magnetic field;
Described tunnel magnetoresistive probe is made up of tunnel magnetoresistance element and sensor set collar; Described sensor set collar transition fit is in split type shielding case, and its outer wall is uniformly distributed circumferentially N number of groove, and inwall is uniformly distributed N number of and shallow slot of being interconnected corresponding with unit with grooves in outer wall position; Described tunnel magnetoresistance element is uniformly distributed and rubber seal is fixed in the groove of sensor set collar outer wall; Wherein 2≤N≤16;
Described printed circuit board is made up of rigid printed circuit plate PCB and flexible circuit board FPC; Described rigid printed circuit plate is installed on the base of sensor holder, and it is for powering for tunnel magnetoresistance element and sending detection signal to data acquisition unit; Described flexible circuit board one end welding tunnel magnetoresistance element; one end connects rigid printed circuit plate; through sensor set collar inside and outside wall intercommunicating pore; and rubber seal is protected in the shallow slot of sensor support inwall, it is for for tunnel magnetoresistance element electric energy transmitting with to rigid printed circuit plate output detections signal.
4. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 1, it is characterized in that, described cable wire clamp assemblies comprises: cable pre-tight apparatus and steel cable fixation device;
Described cable pre-tight apparatus is used for pretension cable wire, and stretching cable wire is to collimating status; Described steel cable fixation device uses in pairs, it is made up of base, support and set bolt, base is fixedly mounted on steel cable fixation device mounting rail, support is assembled by " work " font and " returning " character form structure, four set bolts respectively from " returning " shape support four direction through sensing center, pass the locus of cable wire and the cable wire that is fixedly clamped by set bolt adjustable from " returning " font carriage center.
5. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 1, it is characterized in that, described sensor holder, Helmholtz coils, split type shielding case, sensor set collar and cable wire are all coaxial.
6. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 3, it is characterized in that, described sensor holder adopts pmma material, described Helmholtz coils adopts enamel covered wire material, described Split type magnetic shielding case adopts low-carbon steel material, and described sensor set collar adopts pmma material.
7. the cable wire defect scanning system based on the weak magnetic measurement sensor of Circle-Array column according to claim 3, it is characterized in that, internal diameter 1mm ~ the 2mm less of the internal diameter of split type magnetic shielding shell end cap of described sensor set collar, 1mm ~ 2mm larger than detected steel cable diameter.Its inside surface is uniformly distributed circumferentially N number of dark 0.5mm ~ 1mm, wide 1mm ~ 2mm and extends to shallow slot in the middle part of it from sensor support one end, and shallow slot is relative with unit with grooves in outer wall position and be interconnected; Wherein 2≤N≤16.
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| CN201410521209.2A CN104280452B (en) | 2014-09-30 | 2014-09-30 | Wire rope defect scanning system based on circular array weak magnetic detection sensor |
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| CN113176330A (en) * | 2021-04-30 | 2021-07-27 | 重庆能源职业学院 | Steel wire rope magnetic flux leakage detection system and application of system to elevator |
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| CN117607244A (en) * | 2024-01-22 | 2024-02-27 | 河南工学院 | Multi-sensitive-array crane steel wire rope flux weakening on-line monitoring method and system |
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