CN112456271B - Real-time online encircling elevator steel wire rope distribution quadrant monitoring system and method - Google Patents
Real-time online encircling elevator steel wire rope distribution quadrant monitoring system and method Download PDFInfo
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- CN112456271B CN112456271B CN202011464014.0A CN202011464014A CN112456271B CN 112456271 B CN112456271 B CN 112456271B CN 202011464014 A CN202011464014 A CN 202011464014A CN 112456271 B CN112456271 B CN 112456271B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 175
- 239000010959 steel Substances 0.000 title claims abstract description 175
- 238000012544 monitoring process Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims description 18
- 230000004907 flux Effects 0.000 claims abstract description 69
- 238000012806 monitoring device Methods 0.000 claims abstract description 31
- 230000007547 defect Effects 0.000 claims abstract description 28
- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 17
- 230000008859 change Effects 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 25
- 230000009191 jumping Effects 0.000 claims description 21
- 230000002950 deficient Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
- B66B5/125—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack electrical
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a real-time online encircling type elevator steel wire rope distribution quadrant monitoring system which comprises an encircling type electromagnetic monitoring device, a motion positioning device and a data acquisition processing module, wherein the encircling type electromagnetic monitoring device comprises an electromagnetic module mounting frame and four electromagnetic modules; the four electromagnetic modules are a first-quadrant electromagnetic module, a second-quadrant electromagnetic module, a third-quadrant electromagnetic module and a fourth-quadrant electromagnetic module respectively; each electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises an arc-shaped yoke part and three polar arms, the exciting coil is arranged on the middle polar arm, and the induction coils are respectively arranged on each side polar arm; the data acquisition processing module is respectively connected with the induction coils of the electromagnetic modules; the motion positioning device comprises a supporting rod, a roller and an encoder. According to the invention, the state of the steel wire rope is analyzed according to the magnetic flux change obtained by four-quadrant monitoring, so that guidance is provided for tightness adjustment and defect overhaul of the steel wire rope, and the operation safety of the vertical elevator is ensured.
Description
Technical Field
The invention belongs to the technical field of elevator safety monitoring, and particularly relates to a real-time online surrounding elevator steel wire rope distribution quadrant monitoring system and method.
Background
As special equipment, vertical elevators are responsible for important tasks of transporting passengers in railways and urban rail transit, and the safety of the vertical elevators is of paramount importance. In order to ensure the safety of passengers and reduce the occurrence probability of accidents, the vertical elevator needs to be regularly detected and maintained, so that the equipment is ensured to be in a good running state. However, at present, the maintenance of the vertical elevator mainly adopts manual work Zhou Qixiu and fault maintenance, namely, when no fault occurs, the periodic inspection is carried out by staff, and when the fault occurs, the maintenance is carried out, and the mode belongs to post-hoc behavior, so that the fault cannot be effectively prevented, and serious accidents cannot be avoided; meanwhile, periodical overhaul can cause excessive overhaul or untimely maintenance, so that a great deal of time, manpower and material resources are consumed, the effect is poor, and the operation difficulty and the operation cost are high.
The elevator steel wire rope is a component for connecting the counterweight and the car and transmitting power for elevator lifting, is a key component of the elevator and is important to the operation safety of the elevator. The elevator wire rope is a spiral wire bundle formed by twisting hundreds of stranded wires together according to a certain rule, and because of the complex structure, the number of the formed wires is numerous, and when the inner part of the wires are defective, the wires are difficult to check manually, so hidden danger can be left, the running state of the elevator is influenced, and the life and property safety of passengers are threatened. The magnetic field detection is used as a nondestructive detection method and can be applied to the state monitoring of the elevator steel wire rope. At present, in the disclosed patent, regarding the technical aspect of elevator steel wire rope monitoring, for example, CN201910811217.3 monitors electromagnetic sensor and monitoring method of elevator traction steel belt state, the patent discloses a method for detecting steel wire belt state through electromagnetic sensor, but the patent is described as an open loop magnetic flux sensor, the detection precision is low, and only one side of the steel wire belt can be detected, the detection range does not realize circumferential full coverage of the steel wire belt, circumferential quadrant positioning can not be carried out on the steel wire belt defect, in the patent sensor, only one group of electromagnet modules can not work normally once the modules fail, and the reliability of the sensor is low. The patent CN201910170006.6 discloses a clamping type magnetic flux sensor and a using method thereof, wherein the clamping type magnetic flux sensor is used for detecting the tension of an exposed steel cable in the existing structure, the patent can only detect the internal tension of one steel cable and can not position the position of a detection point, and the patent sensor has only one group of electromagnet modules, so that the modules can not work normally once the modules fail, and the reliability of the sensor is lower.
In summary, the following disadvantages exist in the monitoring of the elevator wire rope in the prior art: (1) One electromagnetic sensor only monitors one object, and the detection capacity and the detection range are small; (2) The open loop sensor has low measurement precision, and the maintenance of the closed loop sensor cannot be disassembled inconveniently; (3) The electromagnetic sensor structure can only detect one side of the steel wire rope, and can not realize the full coverage of the detected object; (4) The defect positioning measures of the detection points are insufficient, and the accurate positions of the defects cannot be accurately positioned; (5) abnormal jump of the steel wire rope cannot be monitored.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a real-time online surrounding elevator steel wire rope distribution quadrant monitoring system and method, which are used for monitoring the steel wire rope of a vertical elevator, collecting magnetic flux data of the section of the steel wire rope, analyzing faults and positioning the steel wire rope for prediction, providing reliable support for timely overhaul of the vertical elevator and providing effective technical means for guaranteeing the operation safety of the vertical elevator.
In order to achieve the above object, according to one aspect of the present invention, there is provided a real-time online encircling elevator wire rope distribution quadrant monitoring system, which is characterized by comprising an encircling electromagnetic monitoring device, a motion positioning device and a data acquisition processing module, wherein:
the encircling type electromagnetic monitoring device comprises an electromagnetic module mounting frame and four electromagnetic modules mounted on the electromagnetic module mounting frame, wherein the electromagnetic module mounting frame is provided with a through hole serving as a steel wire rope moving channel;
the four electromagnetic modules are respectively a first-quadrant electromagnetic module, a second-quadrant electromagnetic module, a third-quadrant electromagnetic module and a fourth-quadrant electromagnetic module, and are respectively arranged in a first quadrant to a fourth quadrant of a Cartesian coordinate system, and the four electromagnetic modules are arranged around the steel wire rope;
each electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises an arc-shaped yoke part and three polar arms extending out of the intrados of the yoke part, so that the E-shaped magnetic core has an arc-shaped cross section perpendicular to the central line of the intrados of the yoke part, the three polar arms are respectively two side polar arms and a middle polar arm positioned between the two side polar arms, the exciting coil is arranged on the middle polar arm, one induction coil is respectively arranged on each side polar arm, and magnetic force lines emitted by the exciting coil pass through a plurality of steel wires in a quadrant where the electromagnetic module is positioned and then pass through the induction coils at two sides to form a closed loop; the cross section of the E-shaped magnetic core is a cross section perpendicular to the center line of the intrados of the yoke part;
the closed loop formed by the four electromagnetic modules in the circumferential direction of the steel wire rope can fully cover the circumferential surface of the steel wire rope at 360 degrees;
the data acquisition processing module is respectively connected with the induction coils of the electromagnetic modules so as to monitor the jumping of the steel wire rope and the internal defects of the multi-strand steel wires of each quadrant through the magnetic flux of each quadrant;
the motion positioning device comprises a supporting rod, a roller and an encoder, wherein one end of the supporting rod is installed on the electromagnetic module installation frame, the other end of the supporting rod is installed on the roller, the roller is pressed on the steel wire rope to rotate along with the motion of the steel wire rope, and the encoder is installed on the roller to position the steel wire rope through the rotation of the roller.
Preferably, the motion positioning device further comprises a tension spring, one end of the tension spring is arranged on the electromagnetic module mounting frame, and the other end of the tension spring is arranged on the supporting rod, so that the roller is always pressed on the steel wire rope;
one end of the supporting rod is hinged to the electromagnetic module mounting frame through a hinge shaft, and the central line of the hinge shaft is perpendicular to the central line of the intrados of the yoke part.
Preferably, the electromagnetic module mounting rack comprises a first encircling support and a second encircling support, the first encircling support is provided with the first-quadrant electromagnetic module and the second-quadrant electromagnetic module, the second encircling support is provided with the third-quadrant electromagnetic module and the fourth-quadrant electromagnetic module, one ends of the first encircling support and the second encircling support are hinged together through encircling rotating shafts, and the other ends of the first encircling support and the second encircling support are connected through encircling buckling locks, wherein the central line of the encircling rotating shafts is vertically parallel to the central line of the intrados of the yoke part.
Preferably, the electromagnetic module mounting frame comprises a plurality of groups of bracket units;
for each group of bracket units, each bracket unit comprises a first encircling bracket and a second encircling bracket, the first encircling bracket and the second encircling bracket jointly encircle a through hole serving as a steel wire rope moving channel, so that the electromagnetic module mounting frame can be penetrated by a plurality of steel wire ropes, the first encircling bracket is provided with the one-quadrant electromagnetic module and the two-quadrant electromagnetic module, and the second encircling bracket is provided with the three-quadrant electromagnetic module and the four-quadrant electromagnetic module;
the four electromagnetic modules on each group of the bracket units are respectively arranged in four quadrants of a Cartesian coordinate system at respective positions;
all the first encircling brackets are fixedly connected together and all the second encircling brackets are also fixedly connected together, so that the first encircling brackets and the second brackets are combined together to form an encircling bracket; the first encircling support and the second encircling support at one end are hinged together through encircling rotating shafts, the first encircling support and the second encircling support at the other end are connected through encircling buckling locks, and the center line of the encircling rotating shafts is vertically parallel to the center line of the inner cambered surface of the yoke part.
Preferably, the data acquisition processing module comprises a field acquisition device and a remote monitoring terminal capable of communicating with the field acquisition device, the field acquisition device is respectively connected with each electromagnetic module through an integrated signal wire, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device, the magnetic fluxes are grouped according to the quadrant positions of different electromagnetic modules, a circumferential quadrant point cloud image formed by magnetic flux detection data of a section of the steel wire rope is obtained, the state of the steel wire in the corresponding quadrant is judged through abnormal circumferential quadrant point cloud image analysis, the quadrant of the defect in the section of the steel wire rope is positioned, so that position information of the defect in the circumferential direction of the steel wire rope is obtained, and the remote monitoring terminal can also obtain position information of the defect along the axial direction of the steel wire rope according to feedback of an encoder and obtain the jumping condition of the steel wire rope through the change condition of the magnetic fluxes of each quadrant.
Preferably, a fixed bracket is arranged on the encircling type electromagnetic monitoring device, the fixed bracket is arranged on a machine placing beam, a steel structure upright post or a concrete well wall of the elevator, and the encircling type electromagnetic monitoring device is arranged in a steel wire rope area between the lift car and the motor.
According to another aspect of the present invention, there is also provided a monitoring method using the encircling elevator wire rope distribution quadrant monitoring system, which is characterized by comprising the steps of:
(1) The device comprises a first-quadrant electromagnetic module, a second-quadrant electromagnetic module, a third-quadrant electromagnetic module and a fourth-quadrant electromagnetic module, wherein the first-quadrant electromagnetic module, the second-quadrant electromagnetic module, the third-quadrant electromagnetic module and the fourth-quadrant electromagnetic module of the encircling type electromagnetic monitoring device respectively collect magnetic fluxes of steel wires in corresponding quadrants, and the motion positioning device collects position information of detection points along the axial direction of the steel wire along with the movement of the steel wire;
(2) The on-site acquisition device acquires the magnetic flux and the position information of the detection point along the axial direction of the steel wire rope and uploads the information to the data acquisition processing module through the integrated signal wire;
(3) The on-site acquisition device transmits the received magnetic flux of all the steel wire ropes of the elevator and the position information of the detection points along the axial direction of the steel wire ropes to the remote monitoring terminal of the data acquisition processing module;
(4) The remote monitoring terminal groups magnetic fluxes collected by the encircling type electromagnetic monitoring device according to the quadrant positions of different electromagnetic modules, and a circumferential quadrant point cloud picture formed by magnetic flux detection data of the section of the steel wire rope is obtained;
(5) The remote monitoring terminal screens abnormal circumferential quadrant point cloud pictures;
(6) The remote monitoring terminal analyzes the abnormal circumferential quadrant point cloud patterns, firstly compares the abnormal circumferential quadrant point cloud patterns with magnetic fluxes collected by two induction coils of the same-quadrant electromagnetic module, and secondly compares magnetic fluxes of different quadrants to analyze and judge states of detection points of the steel wire rope;
(7) The remote monitoring terminal judges that the detection point is defective if the magnetic fluxes acquired by the two induction coils of the same-quadrant electromagnetic module are inconsistent through comparison;
(8) The remote monitoring terminal judges the severity of the detection point defect by comparing the magnetic flux difference degrees of different quadrants;
(9) The remote monitoring terminal generates an analysis result of a wire rope detection point, and adds quadrant information of a problematic wire rope position and position information along the axial direction of the wire rope, and positions defects along the circumferential direction of the wire rope and the axial direction of the wire rope.
Preferably, in step (5), the remote monitoring terminal merges and stores the abnormal circumferential quadrant point cloud picture and the corresponding position information along the axial direction of the steel wire rope, does not merge the normal circumferential quadrant point cloud picture and the position information along the axial direction of the steel wire rope, separately compresses and stores the abnormal circumferential quadrant point cloud picture, and automatically deletes the abnormal circumferential quadrant point cloud picture after a period of time.
Preferably, the method further comprises: (10) The remote monitoring terminal also analyzes the jumping amount and the jumping direction of the steel wire rope according to the magnetic flux change obtained by four-quadrant monitoring, obtains the tensioning degree and the elongation condition of the steel wire rope, and generates a recommendation for the tightness adjustment of the steel wire rope.
Preferably, the method further comprises: (11) The remote monitoring terminal performs early warning on the analyzed steel wire rope state, and the steel wire rope state is divided into a plurality of layers according to the severity of the bad state, and different layers perform early warning in different modes.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
1) The invention provides a real-time on-line encircling multi-strand elevator steel wire rope distribution quadrant monitoring system, which utilizes the magneto-elastic effect to monitor the magnetic flux change of all strands of steel wires in a steel wire rope in a circumferential manner through four groups of electromagnetic modules in an encircling electromagnetic detection device, analyzes the stress of the steel wire through the magnetic flux change, analyzes and judges the state of detection points of the steel wire rope through the comparison of the magnetic fluxes of the same quadrants and the magnetic fluxes of different quadrants, so that the defect of the steel wire and the jumping amount of the steel wire rope can be judged, the quadrant area in the section of the steel wire rope where the defective steel wire is positioned can be positioned, the position of the defect on the steel wire rope can be accurately positioned through the movement positioning device, the position of the detection point along the axial direction of the steel wire rope can be combined with the quadrant positioning and the movement positioning, the two-dimensional accurate positioning of the circumferential direction and the axial direction on the steel wire rope can be realized, reliable data support is provided for timely overhaul of a vertical elevator, and the running safety of the vertical elevator is ensured; meanwhile, the jumping amount and the jumping direction of the steel wire rope are analyzed according to the magnetic flux change obtained through four-quadrant monitoring, so that the tensioning degree and the elongation condition of the steel wire rope are judged, and guidance is provided for the tightness adjustment of the steel wire rope.
2) The four electromagnetic module combinations of the encircling type electromagnetic detection device respectively correspond to four quadrants and are uniformly distributed in the circumferential direction, and are encircling to form the closed sensor device, the detection range is 360-degree, the full coverage of the steel wire ropes is high in reliability, the detection precision is high, the defect positioning is accurate, a plurality of steel wire ropes can be monitored at the same time, the detection efficiency is high, the device is convenient to install and maintain, and the effective monitoring of the states of the steel wire ropes of the elevator can be realized.
Drawings
Fig. 1 is a schematic diagram of a real-time online encircling multi-strand elevator wire rope distribution quadrant monitoring system of the present invention;
FIG. 2 is a schematic diagram of an encircling electromagnetic monitoring device according to the present invention;
FIG. 3 is an exploded view of the encircling electromagnetic monitoring device of the present invention;
FIG. 4 is a schematic diagram of one of the electromagnetic modules of the present invention;
FIG. 5 is a schematic view of the electromagnetic module mounting of the present invention when closed;
FIG. 6 is a schematic view of the electromagnetic module mount of the present invention with the electromagnetic module mount open;
FIG. 7 is a schematic view of a kinematic positioning apparatus of the present invention;
FIG. 8 is a schematic view of the invention with the interlinked stent closed;
FIG. 9 is a schematic view of the invention with the interlinked brackets open;
fig. 10 is a schematic diagram of the installation and placement of the real-time on-line encircling multi-strand elevator wire rope distribution quadrant monitoring system of the present invention on an elevator.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1 to 7, the real-time online distributed quadrant monitoring system for the steel wire rope 4 of the encircling elevator comprises an encircling electromagnetic monitoring device 1, a motion positioning device 2 and a data acquisition and processing module, wherein:
the encircling type electromagnetic monitoring device 1 comprises an electromagnetic module mounting frame and four electromagnetic modules mounted on the electromagnetic module mounting frame, wherein the electromagnetic module mounting frame is provided with a through hole serving as a moving channel of a steel wire rope 4; the wire rope 4 can pass through the through hole, a gap is formed between the wire rope 4 and the encircling type electromagnetic monitoring device 1, the wire rope 4 and the encircling type electromagnetic monitoring device 1 are in non-contact, and the encircling type electromagnetic monitoring device 1 does not influence the movement of the wire rope 4 so as to realize the monitoring of different axial positions of the wire rope 4.
The four electromagnetic modules are uniformly distributed in the circumferential direction, namely a one-quadrant electromagnetic module 101, a two-quadrant electromagnetic module 102, a three-quadrant electromagnetic module 103 and a four-quadrant electromagnetic module 104, and are respectively arranged in a first quadrant to a fourth quadrant of a Cartesian coordinate system; the axis of the wire rope 4 passes through the origin of the cartesian coordinate system.
As a preferable structure, the electromagnetic module mounting rack includes a first encircling bracket 106 and a second encircling bracket 105, the first encircling bracket 106 is provided with the first quadrant electromagnetic module 101 and the second quadrant electromagnetic module 102, the second encircling bracket 105 is provided with the third quadrant electromagnetic module 103 and the fourth quadrant electromagnetic module 104, one ends of the first encircling bracket 106 and the second encircling bracket 105 are hinged together through an encircling rotating shaft 108, and can be opened and closed in a rotating way, and the other ends are connected through encircling buckling locks, so that locking of the first encircling bracket 106 and the second encircling bracket is realized; wherein, the center line of the encircling rotating shaft 108 is perpendicular and parallel to the center line of the intrados of the yoke 111. The first-quadrant electromagnetic module 101 and the second-quadrant electromagnetic module 102 are installed in the clamping groove of the first encircling bracket 106 through the fixed buckle lock 109, and the third-quadrant electromagnetic module 103 and the fourth-quadrant electromagnetic module 104 are installed in the clamping groove of the second encircling bracket 105 through the fixed buckle lock 109.
For each electromagnetic module, each electromagnetic module comprises an E-shaped magnetic core 11, an exciting coil 12 and two induction coils 13, wherein the E-shaped magnetic core 11 comprises an arc-shaped yoke 111 and three pole arms extending from the inner cambered surface of the yoke 111, so that the cross section of the E-shaped magnetic core 11 perpendicular to the central line of the inner cambered surface of the yoke 111 is arc-shaped, therefore, the E-shaped magnetic core 11 is equivalent to a conventional E-shaped magnetic core with the yoke perpendicular to the pole arms, the three pole arms are respectively two side pole arms 113 and an intermediate pole arm 112 positioned between the two side pole arms 113, the exciting coil 12 is arranged on the intermediate pole arm 112, each side pole arm 113 is respectively provided with one induction coil 13, the magnetic force lines emitted by the exciting coil 12 pass through a plurality of steel wires in the quadrant where the electromagnetic module is positioned, and then pass through the induction coils 13 at the two sides to form a closed loop, namely, the magnetic force lines of each electromagnetic module can independently form a closed loop, and four electromagnetic modules are arranged around the steel wire rope 4; the cross section of the E-shaped core 11 is a cross section perpendicular to the center line of the intrados of the yoke 111;
the four electromagnetic modules are combined together in a closed loop formed in the circumferential direction of the steel wire rope 4, and can fully cover the circumferential surface of the steel wire rope 4 by 360 degrees.
The data acquisition processing module is respectively connected with the induction coils 13 of the electromagnetic modules so as to monitor the states of the multi-strand steel wires in each quadrant through the magnetic flux condition, and is used for analyzing the stress of the steel wire rope 4, analyzing and judging the states of detection points of the steel wire rope 4 through the magnetic flux comparison of the same quadrant and the magnetic flux comparison of different quadrants, and monitoring the jump of the steel wire rope and the internal defects of the multi-strand steel wires in each quadrant through the magnetic flux condition. The detection point refers to a position on the steel wire rope 4 detected by the encircling electromagnetic monitoring device 1. The two aspects of the state of the wire rope 4 can be analytically known by means of the magnetic flux: 1. abnormal jumping, wherein magnetic fluxes in different quadrants change when the abnormal jumping occurs; 2. when the inner part of the steel wire rope is defective, defects such as broken wires and the like in the steel wire rope can be reflected in the change of magnetic flux, whether the surface and the inner area of the steel wire rope corresponding to the quadrant are defective or not can be judged by analyzing the magnetic flux of the four quadrants and the magnetic flux change of different axial positions in the same quadrant, so that guidance is provided for fixed-point maintenance of maintenance personnel, and the fixed point is accurately positioned according to the axial positions and the circumferential quadrants.
The motion positioning device 2 comprises a supporting rod 202, a roller 203 and an encoder, wherein one end of the supporting rod 202 is installed on the electromagnetic module installation frame, the other end of the supporting rod is installed on the roller 203, the roller 203 is pressed on the steel wire rope 4 to rotate along with the motion of the steel wire rope 4, the encoder is installed on the roller 203 to realize the positioning of the steel wire rope 4 through the rotation of the roller 203, the encoder is used for recording the number of turns of the roller 203, positioning detection points are positioned along the axial position information of the steel wire rope 4, and the positioning of defects along the axial direction of the steel wire rope is realized. The roller 203 of the invention is preferably a grooved roller, the outer circle of the grooved roller is provided with a circle of grooves, and the steel wire rope 4 is positioned in the grooves of the roller 203 and is not easy to fall off from the roller 203.
Further, the motion positioning device 2 further comprises a tension spring 201, one end of the tension spring 201 is installed on the electromagnetic module installation frame, the other end of the tension spring 201 is installed on the supporting rod 202, and the tension spring 201 provides a pressing force for the motion positioning device 2, so that the roller 203 is always pressed on the steel wire rope 4.
One end of the strut 202 is hinged to the electromagnetic module mounting frame through a hinge shaft, and the center line of the hinge shaft is perpendicular to the center line of the intrados of the yoke 111. The hinge shaft is matched with the tension spring 201, so that the roller 203 can be further ensured to be directly pressed on the steel wire rope 4.
Referring to fig. 8 and 9, further, the electromagnetic module mounting frame of the encircling electromagnetic monitoring device 1 may be expanded into multiple rings (each first encircling bracket 106 and the second encircling bracket 105 at the corresponding position form a ring together), and the electromagnetic module mounting frame includes multiple groups of bracket units;
for each group of bracket units, each bracket unit comprises a first encircling bracket 106 and a second encircling bracket 105, the first encircling bracket 106 and the second encircling bracket 105 jointly encircle a through hole serving as a moving channel of the steel wire ropes 4, so that the electromagnetic module mounting rack can be used for a plurality of steel wire ropes 4 to pass through, the monitoring system can monitor the states of a plurality of steel wire ropes 4 at the same time, the first encircling bracket 106 is provided with the one-quadrant electromagnetic module 101 and the two-quadrant electromagnetic module 102, and the second encircling bracket 105 is provided with the three-quadrant electromagnetic module 103 and the four-quadrant electromagnetic module 104;
the four electromagnetic modules on each group of the bracket units are respectively arranged in four quadrants of a Cartesian coordinate system at respective positions;
all the first encircling brackets 106 are fixedly connected together and all the second encircling brackets 105 are also fixedly connected together, so that the first encircling brackets 106 and the second brackets are combined together to form a interlinked encircling bracket; the first encircling bracket 106 and the second encircling bracket 105 at one end are hinged together through an encircling rotating shaft 108, and the first encircling bracket 106 and the second encircling bracket 105 at the other end are connected through encircling buckling locks, wherein the center line of the encircling rotating shaft 108 is vertically parallel to the center line of the intrados of the yoke 111.
Referring to fig. 10, a fixed bracket is arranged on the encircling type electromagnetic monitoring device 1, the fixed bracket is installed on a machine placing beam, a steel structure upright post or a concrete well wall of an elevator, and the encircling type electromagnetic monitoring device 1 is installed in a steel wire rope 4 area between a car 5 and a motor.
Further, the data acquisition processing module comprises a field acquisition device and a remote monitoring terminal capable of communicating with the field acquisition device, the field acquisition device is respectively connected with each electromagnetic module through an integrated signal wire 3, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device 1, the magnetic fluxes are grouped according to quadrant positions of different electromagnetic modules, a circumferential quadrant point cloud image formed by magnetic flux detection data of a section of the steel wire rope 4 is obtained, the state of the steel wire in the corresponding quadrant is analyzed and judged through the abnormal circumferential quadrant point cloud image, the quadrant where the defect is located in the section of the steel wire rope 4 is positioned, so that position information of the defect in the circumferential direction of the steel wire rope is obtained, and the remote monitoring terminal can also obtain position information of the defect along the axial direction of the steel wire rope according to feedback of an encoder and the jumping condition of the steel wire rope through the change condition of the magnetic fluxes of each quadrant. The circumferential quadrant point cloud image is composed of magnetic flux data collected by four quadrant electromagnetic modules. The remote monitoring terminal analyzes the jumping amount and the jumping direction of the steel wire rope 4 according to the magnetic flux change obtained by four-quadrant monitoring, and obtains the tensioning degree and the elongation condition of the steel wire rope 4. The invention can measure the jumping of a single steel wire rope, and if the steel wire rope always jumps in a certain direction, the magnetic field measured by the corresponding electromagnetic module is different from other magnetic fields. For example, if the wire rope always jumps in one or three quadrants, that is, the wire rope is far from the one-quadrant electromagnetic module 101 or the three-quadrant electromagnetic module 103, the magnetic flux data monitored by the one-quadrant electromagnetic module 101 or the three-quadrant electromagnetic module 103 will change (be large or small) periodically, while the two-quadrant electromagnetic module 102 or the four-quadrant electromagnetic module 104 will not change basically, the direction of the wire rope jumping can be determined according to the magnetic flux conditions of the four quadrants, and then the adjustment countermeasures are taken. Similarly, the invention can also be used for monitoring the jumping quantity of a plurality of steel wire ropes.
The remote monitoring terminal can also perform early warning on the state of the analyzed steel wire rope 4, the state can be divided into a plurality of layers according to the severity of the bad state, and different modes are used for early warning on different layers.
The electromagnetic module of the encircling type electromagnetic monitoring device 1 adopts a general modularized design, is connected with a standardized integrated signal wire 3, the integrated signal wire 3 is connected with a field acquisition device through a standardized connector, the signal wire connector is directly pulled out for integral replacement when the electromagnetic module fails, and the field acquisition device receives the magnetic flux of all the steel wire ropes 4 of one elevator, performs primary treatment and transmits the magnetic flux to a remote monitoring terminal through a wireless network such as a 5G or a wired mode.
According to another aspect of the invention, there is also provided a monitoring method using the distributed quadrant monitoring system for the steel wire rope 4 of the encircling elevator, comprising the following steps:
(1) The surrounding type electromagnetic monitoring device 1 comprises a first-quadrant electromagnetic module 101, a second-quadrant electromagnetic module 102, a third-quadrant electromagnetic module 103 and a fourth-quadrant electromagnetic module 104, wherein the first-quadrant electromagnetic module 101, the second-quadrant electromagnetic module 102, the third-quadrant electromagnetic module 103 and the fourth-quadrant electromagnetic module 104 respectively collect magnetic fluxes of steel wires in corresponding quadrants, and the motion positioning device 2 collects position information of detection points along the axial direction of the steel wire rope 4 along with the motion of the steel wire rope 4;
(2) The acquired magnetic flux and the position information of the detection point along the axial direction of the steel wire rope 4 are uploaded to a field acquisition device of the data acquisition processing module through an integrated signal wire 3;
(3) The field acquisition device transmits the received magnetic flux of all the steel wire ropes 4 of the elevator and the position information of the detection points along the axial direction of the steel wire ropes 4 to a remote monitoring terminal of the data acquisition processing module;
(4) The remote monitoring terminal groups magnetic fluxes collected by the encircling type electromagnetic monitoring device 1 according to the quadrant positions of different electromagnetic modules, and a circumferential quadrant point cloud picture formed by magnetic flux detection data of the section of the steel wire rope 4 is obtained;
(5) The remote monitoring terminal screens abnormal circumferential quadrant point cloud pictures; preferably, the remote monitoring terminal combines and stores the abnormal circumferential quadrant point cloud picture and the corresponding position information along the axial direction of the steel wire rope 4, does not combine the normal circumferential quadrant point cloud picture and the position information along the axial direction of the steel wire rope 4, compresses the abnormal circumferential quadrant point cloud picture separately, stores the abnormal circumferential quadrant point cloud picture, and automatically deletes the abnormal circumferential quadrant point cloud picture after a period of time;
(6) The remote monitoring terminal analyzes the abnormal circumferential quadrant point cloud patterns, firstly compares the abnormal circumferential quadrant point cloud patterns with magnetic fluxes collected by two induction coils 13 of the same-quadrant electromagnetic module, and secondly compares magnetic fluxes of different quadrants to analyze and judge states of detection points of the steel wire rope 4;
(7) The remote monitoring terminal judges that the detection point is defective if the magnetic fluxes acquired by the two induction coils 13 of the same-quadrant electromagnetic module are inconsistent through comparison;
(8) The remote monitoring terminal judges the severity of the detection point defect by comparing the magnetic flux difference degrees of different quadrants;
(9) The remote monitoring terminal generates an analysis result of a detection point of the steel wire rope 4, and adds quadrant information of a problematic steel wire rope part and position information along the axial direction of the steel wire rope, and positions of defects along the circumferential direction of the steel wire rope and positions along the axial direction of the steel wire rope 4 are positioned.
(10) The remote monitoring terminal performs early warning on the state of the analyzed steel wire rope 4, and the steel wire rope is divided into a plurality of layers according to the severity of the bad state, and different layers perform early warning in different modes.
(11) The remote monitoring terminal also analyzes the jumping amount and the jumping direction of the steel wire rope 4 according to the magnetic flux change obtained by four-quadrant monitoring, obtains the tensioning degree and the elongation condition of the steel wire rope 4, and generates a recommendation for the tightness adjustment of the steel wire rope 4.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. Real-time online surrounding type elevator wire rope distributes quadrant monitoring system, its characterized in that includes surrounding type electromagnetic monitoring device, motion positioner and data acquisition processing module, wherein:
the encircling type electromagnetic monitoring device comprises an electromagnetic module mounting frame and four electromagnetic modules mounted on the electromagnetic module mounting frame, wherein the electromagnetic module mounting frame is provided with a through hole serving as a steel wire rope moving channel;
the four electromagnetic modules are respectively a first-quadrant electromagnetic module, a second-quadrant electromagnetic module, a third-quadrant electromagnetic module and a fourth-quadrant electromagnetic module, and are respectively arranged in a first quadrant to a fourth quadrant of a Cartesian coordinate system, and the four electromagnetic modules are arranged around the steel wire rope;
each electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises an arc-shaped yoke part and three polar arms extending out of the intrados of the yoke part, so that the E-shaped magnetic core has an arc-shaped cross section perpendicular to the central line of the intrados of the yoke part, the three polar arms are respectively two side polar arms and a middle polar arm positioned between the two side polar arms, the exciting coil is arranged on the middle polar arm, one induction coil is respectively arranged on each side polar arm, and magnetic force lines emitted by the exciting coil pass through a plurality of steel wires in a quadrant where the electromagnetic module is positioned and then pass through the induction coils at two sides to form a closed loop;
the closed loop formed by the four electromagnetic modules in the circumferential direction of the steel wire rope can fully cover the circumferential surface of the steel wire rope at 360 degrees;
the data acquisition processing module is respectively connected with the induction coils of the electromagnetic modules so as to monitor the jumping of the steel wire rope and the internal defects of the multi-strand steel wires of each quadrant through the magnetic flux of each quadrant;
the motion positioning device comprises a supporting rod, a roller and an encoder, wherein one end of the supporting rod is installed on the electromagnetic module installation frame, the other end of the supporting rod is installed on the roller, the roller is pressed on the steel wire rope to rotate along with the motion of the steel wire rope, and the encoder is installed on the roller to position the steel wire rope through the rotation of the roller.
2. The real-time on-line encircling elevator wire rope distribution quadrant monitoring system of claim 1, wherein the motion positioning device further comprises a tension spring, one end of the tension spring is mounted on the electromagnetic module mounting bracket, and the other end of the tension spring is mounted on the strut, so that the roller is always pressed on the wire rope;
one end of the supporting rod is hinged to the electromagnetic module mounting frame through a hinge shaft, and the central line of the hinge shaft is perpendicular to the central line of the intrados of the yoke part.
3. The real-time online encircling elevator wire rope distribution quadrant monitoring system according to claim 1, wherein the electromagnetic module mounting rack comprises a first encircling bracket and a second encircling bracket, the first encircling bracket is provided with the one-quadrant electromagnetic module and the two-quadrant electromagnetic module, the second encircling bracket is provided with the three-quadrant electromagnetic module and the four-quadrant electromagnetic module, one ends of the first encircling bracket and the second encircling bracket are hinged together through encircling rotating shafts, and the other ends of the first encircling bracket and the second encircling bracket are connected through encircling buckling locks, wherein the central line of the encircling rotating shafts is vertically parallel to the central line of the inner cambered surface of the yoke.
4. The real-time online encircling elevator wire rope distribution quadrant monitoring system of claim 1, wherein the electromagnetic module mounting bracket comprises a plurality of groups of bracket units;
for each group of bracket units, each bracket unit comprises a first encircling bracket and a second encircling bracket, the first encircling bracket and the second encircling bracket jointly encircle a through hole serving as a steel wire rope moving channel, so that the electromagnetic module mounting frame can be penetrated by a plurality of steel wire ropes, the first encircling bracket is provided with the one-quadrant electromagnetic module and the two-quadrant electromagnetic module, and the second encircling bracket is provided with the three-quadrant electromagnetic module and the four-quadrant electromagnetic module;
the four electromagnetic modules on each group of the bracket units are respectively arranged in four quadrants of a Cartesian coordinate system at respective positions;
all the first encircling brackets are fixedly connected together and all the second encircling brackets are also fixedly connected together, so that the first encircling brackets and the second brackets are combined together to form an encircling bracket; the first encircling support and the second encircling support at one end are hinged together through encircling rotating shafts, the first encircling support and the second encircling support at the other end are connected through encircling buckling locks, and the center line of the encircling rotating shafts is vertically parallel to the center line of the inner cambered surface of the yoke part.
5. The real-time online encircling type elevator steel wire rope distributed quadrant monitoring system according to claim 1, wherein the data acquisition processing module comprises a field acquisition device and a remote monitoring terminal capable of communicating with the field acquisition device, the field acquisition device is respectively connected with each electromagnetic module through an integrated signal wire, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device, the magnetic fluxes are grouped according to quadrant positions of different electromagnetic modules, a circumferential quadrant point cloud picture formed by magnetic flux detection data of a section of a steel wire rope is obtained, the state of a steel wire in a corresponding quadrant is judged through abnormal circumferential quadrant point cloud picture analysis, the quadrant of a defect in the section of the steel wire rope is positioned, so that position information of the defect in the circumferential direction of the steel wire rope is obtained, and the remote monitoring terminal can also obtain position information of the defect along the axial direction of the steel wire rope according to feedback of an encoder and obtain the jumping condition of the steel wire rope through the change condition of the magnetic fluxes of each quadrant.
6. The real-time on-line encircling type elevator steel wire rope distribution quadrant monitoring system according to claim 1, wherein a fixed bracket is arranged on the encircling type electromagnetic monitoring device, the fixed bracket is arranged on a machine placing beam, a steel structure upright post or a concrete hoistway wall of an elevator, and the encircling type electromagnetic monitoring device is arranged in a steel wire rope area between a lift car and a motor.
7. Monitoring method employing a surrounding elevator wire rope distribution quadrant monitoring system according to any of claims 1-6, characterized in that it comprises the following steps:
(1) The device comprises a first-quadrant electromagnetic module, a second-quadrant electromagnetic module, a third-quadrant electromagnetic module and a fourth-quadrant electromagnetic module, wherein the first-quadrant electromagnetic module, the second-quadrant electromagnetic module, the third-quadrant electromagnetic module and the fourth-quadrant electromagnetic module of the encircling type electromagnetic monitoring device respectively collect magnetic fluxes of steel wires in corresponding quadrants, and the motion positioning device collects position information of detection points along the axial direction of the steel wire along with the movement of the steel wire;
(2) The on-site acquisition device acquires the magnetic flux and the position information of the detection point along the axial direction of the steel wire rope and uploads the information to the data acquisition processing module through the integrated signal wire;
(3) The on-site acquisition device transmits the received magnetic flux of all the steel wire ropes of the elevator and the position information of the detection points along the axial direction of the steel wire ropes to the remote monitoring terminal of the data acquisition processing module;
(4) The remote monitoring terminal groups magnetic fluxes collected by the encircling type electromagnetic monitoring device according to the quadrant positions of different electromagnetic modules, and a circumferential quadrant point cloud picture formed by magnetic flux detection data of the section of the steel wire rope is obtained;
(5) The remote monitoring terminal screens abnormal circumferential quadrant point cloud pictures;
(6) The remote monitoring terminal analyzes the abnormal circumferential quadrant point cloud patterns, firstly compares the abnormal circumferential quadrant point cloud patterns with magnetic fluxes collected by two induction coils of the same-quadrant electromagnetic module, and secondly compares magnetic fluxes of different quadrants to analyze and judge states of detection points of the steel wire rope;
(7) The remote monitoring terminal judges that the detection point is defective if the magnetic fluxes acquired by the two induction coils of the same-quadrant electromagnetic module are inconsistent through comparison;
(8) The remote monitoring terminal judges the severity of the detection point defect by comparing the magnetic flux difference degrees of different quadrants;
(9) The remote monitoring terminal generates an analysis result of a wire rope detection point, and adds quadrant information of a problematic wire rope position and position information along the axial direction of the wire rope, and positions defects along the circumferential direction of the wire rope and the axial direction of the wire rope.
8. The method according to claim 7, wherein in step (5), the remote monitoring terminal merges and stores the abnormal circumferential quadrant point cloud image and the corresponding position information along the axial direction of the steel wire rope, does not merge the normal circumferential quadrant point cloud image and the position information along the axial direction of the steel wire rope, compresses separately, stores the abnormal circumferential quadrant point cloud image, and automatically deletes the abnormal circumferential quadrant point cloud image after a period of time.
9. The method of monitoring of claim 7, further comprising: (10) The remote monitoring terminal also analyzes the jumping amount and the jumping direction of the steel wire rope according to the magnetic flux change obtained by four-quadrant monitoring, obtains the tensioning degree and the elongation condition of the steel wire rope, and generates a recommendation for the tightness adjustment of the steel wire rope.
10. The method of monitoring according to claim 7, wherein after the step (9), further comprising: the remote monitoring terminal performs early warning on the analyzed steel wire rope state, and the steel wire rope state is divided into a plurality of layers according to the severity of the bad state, and different layers perform early warning in different modes.
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| CN114084767B (en) * | 2021-11-18 | 2022-09-13 | 浙江大学 | Elevator buffering monitoring devices based on wire rope uninstallation and resistance-variable shock attenuation structure |
| CN114544044B (en) * | 2022-02-23 | 2024-05-10 | 北京奇力建通工程技术有限公司 | Magnetic flux sensor detecting member and open magnetic flux sensor |
| CN118176157A (en) * | 2022-12-06 | 2024-06-11 | 山东科技大学 | Elevator traction rope state online detection system and detection method thereof |
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