CN112456292B - Encircling type distribution monitoring system and method for escalator step chain - Google Patents
Encircling type distribution monitoring system and method for escalator step chain Download PDFInfo
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- CN112456292B CN112456292B CN202011463998.0A CN202011463998A CN112456292B CN 112456292 B CN112456292 B CN 112456292B CN 202011463998 A CN202011463998 A CN 202011463998A CN 112456292 B CN112456292 B CN 112456292B
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- 238000012806 monitoring device Methods 0.000 claims abstract description 34
- 230000007547 defect Effects 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 79
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B27/00—Indicating operating conditions of escalators or moving walkways
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/02—Driving gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
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- Escalators And Moving Walkways (AREA)
Abstract
The invention discloses an encircling type distribution monitoring system of an escalator step chain, 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 sequentially arranged on four sides of a rectangle; the electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises a yoke part, a middle polar arm and two side polar arms, the exciting coil is arranged on the middle polar arm, and the induction coils are arranged on the side polar arms; the data acquisition processing module detects defects of the step chain plate and the step roller through the magnetic flux conditions measured by the electromagnetic modules; the motion positioning device comprises a supporting rod, a roller and an encoder. The invention detects the magnetic flux changes of the step roller and the step chain plate in the step chain through four groups of electromagnetic modules, judges and positions the defects, provides reliable data support for timely overhaul of the escalator, and ensures the operation safety of the escalator.
Description
Technical Field
The invention belongs to the technical field of escalator monitoring, and particularly relates to an encircling type distribution monitoring system and method for escalator step chains.
Background
As special equipment, escalators are responsible for important tasks of transporting passengers in railways and urban rail transit, and the safety of the escalator is of great importance. In order to ensure the safety of passengers and reduce the occurrence probability of accidents, the escalator needs to be periodically detected and maintained, so that the equipment is ensured to be in a good running state. However, at present, manual work Zhou Qixiu and fault repair are mainly adopted for overhauling the escalator, namely, when no fault occurs, periodic inspection is carried out by staff, and maintenance is carried out when the fault occurs, so that the method belongs to post-hoc behavior, the fault cannot be effectively prevented, and major accidents are not 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 escalator step chain is a part for connecting steps and driving and transmitting power for the escalator, is a key component of the escalator, and is important for the operation safety of the escalator. The escalator step chain is composed of hundreds of cylindrical rollers and chain plates, and because of the number of the cylindrical rollers and chain plates, the escalator step chain is difficult to check out through manual work when defects occur in the escalator step chain, so that hidden danger can be left, the running state of the escalator is affected, and the life and property safety of passengers is threatened. The magnetic field detection is used as a nondestructive detection method and can be applied to the state monitoring of the escalator step chain. At present, in the disclosed patent, regarding the technical aspect of magnetic field monitoring, for example, CN201910811217.3 monitors electromagnetic sensor and monitoring method of the state of elevator traction steel belt, the patent discloses a method for detecting the state of steel belt 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 steel belt can be detected, the detection range does not realize full coverage of the circumferential direction of steel belt, the circumferential position of steel belt defect can not be positioned, in the patent sensor, only one group of electromagnet modules are provided, the modules can not work normally once failure occurs, and the reliability of the sensor is low. The patent CN201910170006.6 discloses a clamping type magnetic flux sensor and a using method thereof, and discloses a method for detecting the tension of an exposed steel cable in the existing structure through the clamping type magnetic flux sensor.
In summary, the monitoring of the existing escalator has the following disadvantages: (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 E-type electromagnetic sensor structure can only detect one side of the step chain, 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.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an escalator step chain encircling type distribution monitoring system and method, which are used for monitoring a step chain of an escalator, collecting state data, analyzing faults, positioning and predicting, providing reliable data support for timely maintenance of the escalator and providing effective technical means for guaranteeing operation safety of the escalator.
In order to achieve the above object, according to one aspect of the present invention, there is provided an encircling type distribution monitoring system for an escalator step chain, the step chain including two rows of step chain plates arranged side by side and a plurality of step rollers arranged between the two rows of step chain plates, characterized in that the monitoring system includes 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 mounted on the electromagnetic module mounting frame, wherein the electromagnetic module mounting frame is provided with a through hole serving as a step chain moving channel;
Each electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises a yoke part and three pole arms which extend from the yoke part towards the direction of the through hole, the cross section of the E-shaped magnetic core is E-shaped, the three pole arms are respectively two side pole arms and an intermediate pole arm positioned between the two side pole arms, the exciting coil is arranged on the intermediate pole arm, one induction coil is respectively arranged on each side pole arm, magnetic force lines emitted by the exciting coil pass through a step chain and then pass through the induction coils at two sides to form a closed loop, so that a detection area is formed for detecting magnetic flux; the moving direction of the part, corresponding to the E-shaped iron core, on the step chain is vertical to the cross section of the E-shaped iron core;
The four electromagnetic modules are sequentially arranged on four sides of a rectangle so as to enclose the step chain, detection areas of the electromagnetic modules on two opposite sides of the rectangle are used for covering the step roller, and detection areas of the electromagnetic modules on the other two opposite sides of the rectangle are respectively used for covering the step chain plate on the corresponding side;
The data acquisition processing module is respectively connected with the induction coils of the electromagnetic modules so as to detect defects of the step chain plate and the step roller through the magnetic flux conditions measured by the electromagnetic modules;
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 step chain plate so as to rotate along with the motion of the step chain plate, and the encoder is installed on the roller so as to position the step chain 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 step chain;
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 frame comprises a first encircling support and a second encircling support, the first encircling support and the second encircling support are right-angle frames, two electromagnetic modules are respectively mounted on the first encircling support and the second encircling support, 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.
Preferably, the electromagnetic modules of the closed loop passing step roller on the first encircling bracket are provided in plurality and are arranged on the same side of the rectangle;
The electromagnetic modules of the closed loop passing through the step rollers on the second encircling support are also arranged in a plurality and are also arranged on the same side of the rectangle, so that the electromagnetic module mounting frame can be used for a plurality of step chains to pass through, and the step chains can be monitored simultaneously.
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 induction coils of the electromagnetic modules through integrated signal lines, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device, the magnetic fluxes are grouped according to detection areas of different electromagnetic modules to obtain a section point cloud image formed by magnetic flux detection data of sections of the step chain, the state of the step chain in the corresponding detection area is judged through abnormal section point cloud image analysis, the detection area where the defect is located in the section of the step chain is located, so that position information of the defect on the section of the step chain is obtained, and the remote monitoring terminal can obtain the position information of the defect in the moving direction of the step chain according to feedback of an encoder.
Preferably, a fixed support is arranged on the encircling type electromagnetic monitoring device, the fixed support is arranged on the truss of the escalator, and the encircling type electromagnetic monitoring device is located in an area where a step chain in the inclined truss is located.
According to another aspect of the present invention, there is also provided a monitoring method using the escalator step chain encircling type distributed monitoring system, characterized by comprising the steps of:
(1) Each electromagnetic module of the encircling type electromagnetic monitoring device respectively collects magnetic flux in a corresponding detection area, and the motion positioning device collects position information of detection points of the step chain along the moving direction of the step chain along with the motion of the step chain;
(2) The on-site acquisition device acquires position information of the magnetic flux and the detection point of the step chain along the moving direction of the step chain and uploads the position information to the data acquisition processing module through the integrated signal wire;
(3) The on-site acquisition device transmits the received position information of all magnetic fluxes of the step chain of the escalator along the moving direction of the step chain 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 according to detection areas of different electromagnetic modules, and a section point cloud chart formed by magnetic flux detection data of sections of step chains is obtained;
(5) The remote monitoring terminal screens abnormal section point cloud pictures;
(6) The remote monitoring terminal analyzes abnormal section point cloud patterns, firstly compares magnetic fluxes collected by two induction coils of the same electromagnetic module, and secondly compares magnetic fluxes detected by different electromagnetic modules to analyze and judge states of detection points of a step chain, and the method comprises the following steps of:
The remote monitoring terminal judges that the detection point of the step chain is defective if the magnetic fluxes acquired by the two induction coils of the same electromagnetic module are inconsistent through comparison;
The remote monitoring terminal judges the severity of the defect of the detection point of the step chain by comparing the magnetic flux difference degrees detected by different electromagnetic modules;
(7) The remote monitoring terminal generates an analysis result of a detection point of the step chain, and adds detection area information of a step chain section where a problematic step chain part is located and position information along the moving direction of the step chain, and positions defects along the circumferential direction of the step chain and along the moving direction of the step chain.
Preferably, in step (5), the remote monitoring terminal merges and stores the abnormal section point cloud image and the corresponding position information along the moving direction of the step chain, does not merge the normal section point cloud image and the position information along the moving direction of the step chain, separately compresses and stores the abnormal section point cloud image, and automatically deletes the abnormal section point cloud image after a period of time.
Preferably, the method further comprises: (8) The remote monitoring terminal performs early warning on the step chain state obtained by analysis, and the step chain 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 an encircling type distribution monitoring system for an escalator step chain, which utilizes the magneto-elastic effect to distribute four groups of electromagnetic modules on four sides of a rectangle in an electromagnetic detection device which is opened and closed in a encircling mode, monitors the change of magnetic flux of step rollers and step chain plates of the step chain in four areas, judges the defects of the step rollers and the step chain plates through the change of the magnetic flux, positions the defective step rollers and the step chain plates in the section of the step chain, records the positions of detection points of the step chain along the moving direction of the step chain through a motion positioning device, can accurately position the positions of the defects on the step chain through combining the positioning of the section, realizes two-dimensional accurate positioning of the section and the moving direction, provides reliable data support for timely overhaul of the escalator, and ensures the operation safety of the escalator.
2) According to the encircling type distribution monitoring system for the step chain of the escalator, the four electromagnetic modules are encircling to form the closed sensor device, so that the step chain can be surrounded and covered for detection, the reliability is high, the detection precision is high, and the defect positioning is accurate; in addition, can also monitor many step chains simultaneously, detection efficiency is high, and device installation and maintenance are convenient, can realize the effective monitoring of elevator step chain state.
Drawings
FIG. 1 is a schematic view of an escalator step chain encircling type distribution monitoring system of the present invention;
FIG. 2 is a schematic diagram of the structure of the encircling electromagnetic monitoring device of 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 an electromagnetic module according to the present invention;
FIG. 5 is a schematic view of the electromagnetic module mounting bracket of the encircling electromagnetic monitoring device of the present invention after deployment;
FIG. 6 is a schematic view of the structure of the kinematic positioning apparatus of the present invention;
FIG. 7 is a schematic diagram of a closed loop electromagnetic module with a plurality of encircling electromagnetic monitoring devices through a step roller;
FIG. 8 is a schematic view of the deployment of a closed loop step roller electromagnetic module with multiple encircling electromagnetic monitoring devices according to the present invention;
Fig. 9 is a schematic view of an escalator step chain encircling type distribution monitoring system of the present invention mounted on an escalator.
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 9, an escalator step chain 4 embracing type distribution monitoring system, wherein the step chain 4 comprises two rows of step chain 4 plates arranged side by side and a plurality of step rollers arranged between the two rows of step chain 4 plates, the monitoring system comprises an embracing type electromagnetic monitoring device 1, a motion positioning device 2 and a data acquisition 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 step chain 4; the step chain 4 can pass through the through hole, a gap is reserved between the step chain 4 and the encircling type electromagnetic monitoring device 1, the step chain 4 and the encircling type electromagnetic monitoring device are in non-contact, the movement of the step chain 4 is not influenced, and the monitoring of different positions of the step chain 4 is realized.
For each electromagnetic module, each electromagnetic module comprises an E-shaped magnetic core 11, an exciting coil 12 and two induction coils 13, the E-shaped magnetic core 11 comprises a yoke 111 and three polar arms extending from the yoke 111 towards the direction of the through hole, the cross section of the E-shaped magnetic core 11 is in an E shape, the three polar arms are respectively two side polar arms 113 and an intermediate polar arm 112 positioned between the two side polar arms 113, the exciting coil 12 is mounted on the intermediate polar arm 112, one induction coil 13 is mounted on each side polar arm 113, and magnetic force lines emitted by the exciting coil 12 pass through the step chain 4 and then pass through the induction coils 13 at two sides to form a closed loop, so that a detection area is formed for detecting magnetic flux; mounting bosses 14 may be provided at both ends of the yoke 111 of the E-type core 11, the mounting bosses 14 protruding beyond the two side arms, so that the E-type core 11 is mounted on the electromagnetic module mounting frame. Wherein the moving direction of the part of the step chain 4 corresponding to the E-shaped iron core 11 is vertical to the cross section of the E-shaped iron core 11;
The four electromagnetic modules are arranged in sequence on four sides of a rectangle to enclose the step chain 4; the four electromagnetic modules are respectively a first electromagnetic module 101, a second electromagnetic module 102, a third electromagnetic module 103 and a fourth electromagnetic module 104, the detection areas of the electromagnetic modules on two opposite sides of the rectangle are used for covering the step roller (the detection area of the rectangular electromagnetic module on one side is used for covering the upper half part of the step roller, the detection area of the rectangular electromagnetic module on the other side is used for covering the lower half part of the step roller), and the detection areas of the electromagnetic modules on the other two opposite sides are respectively covered with the step chain 4 plates on the corresponding sides.
Four electromagnetic modules encircling the electromagnetic monitoring device 1, wherein each electromagnetic module is provided with a detection area respectively, so that the four detection areas are all provided, each detection area respectively detects one part of the step chain 4, and the four detection areas can cover detection points of the step chain 4; the magnetic flux detected by the electromagnetic module is compared with the data of the detection area and the data of different detection areas to analyze and judge the state of the step chain 4 at the detection point of the step chain 4.
The data acquisition processing module is respectively connected with the induction coils 13 of the electromagnetic modules so as to analyze the stress of the step chain and detect the defects of the step chain 4 plates and the step rollers through the magnetic flux conditions measured by the electromagnetic modules.
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 step chain 4 plate so as to rotate along with the motion of the step chain 4 plate, and the encoder is installed on the roller 203 so as to position the step chain 4 through the rotation of the roller 203.
Further, the kinematic positioning device 2 further comprises a tension spring 201, one end of the tension spring 201 is installed on the electromagnetic module installation frame, and the other end of the tension spring is installed on the supporting rod 202, so that the roller 203 is always pressed on the step chain 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 tension spring 201 provides a pressing force for the motion positioning device 2, so that the roller 203 is not easy to derail when rotating, the encoder is used for recording the rotating circle number of the roller 203, and the position of the detection point of the step chain 4 along the axis of the step chain 4 is positioned, so that the defect axis positioning is realized. The detection point of the step chain 4 refers to a position on the step chain detected by the encircling electromagnetic monitoring device 1.
Further, the electromagnetic module mounting rack comprises a first encircling support 105 and a second encircling support 106, the first encircling support 105 and the second encircling support 106 are right-angle frames, two electromagnetic modules are respectively mounted on the first encircling support 105 and the second encircling support 106, one ends of the first encircling support 105 and the second encircling support 106 are hinged together through encircling rotating shafts 108, the first encircling support 105 and the second encircling support 106 can be made to relatively rotate to open and close, the other ends are connected through encircling buckling locks 107, and the ends of the first encircling support 105 and the second encircling support 106 can be locked. The first electromagnetic module 101 and the fourth electromagnetic module 104 in the encircling electromagnetic monitoring device 1 are respectively installed in the clamping groove of the first encircling bracket 105 through the fixed buckle lock 109, and the third electromagnetic module 103 and the fourth electromagnetic module 104 are respectively installed in the clamping groove of the second encircling bracket 106 through the fixed buckle lock 109.
Further, the electromagnetic modules of the closed loop passing step roller on the first encircling bracket 105 are provided in plurality and they are arranged on the same side of the rectangle; referring to fig. 7 and 8, the first electromagnetic module 101 is provided with a plurality of electromagnetic modules.
The electromagnetic modules of the closed loop passing through the step rollers on the second encircling support 106 are also arranged on the same side of the rectangle, so that the electromagnetic module mounting frame can be used for a plurality of step chains 4 to pass through, the simultaneous monitoring of the step chains 4 is realized, and the detection efficiency is improved. Referring to fig. 7 and 8, the third electromagnetic module 103 is provided in plurality.
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 induction coils 13 of the electromagnetic modules through integrated signal lines 3, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device 1, the magnetic fluxes are grouped according to detection areas of different electromagnetic modules to obtain section point cloud patterns formed by magnetic flux detection data of sections of the step chain 4, the state of the step chain 4 in the corresponding detection area is judged through abnormal section point cloud patterns, and the detection area where the defect is located in the section of the step chain 4 is located, so that position information of the defect on the section of the step chain 4 is obtained, and the remote monitoring terminal can also obtain position information of the defect on the moving direction of the step chain 4 according to feedback of an encoder, so that the position of the defect on the step chain 4 can be accurately located. 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 to be integrally replaced when the electromagnetic module breaks down, and the field acquisition device receives magnetic field data of all step chains 4 of an escalator and performs primary processing and then transmits the magnetic field data to a remote monitoring terminal through a wireless network such as 5G or a wired mode.
Further, a fixed support is arranged on the encircling type electromagnetic monitoring device 1 and is arranged on the truss 5 of the escalator, and the encircling type electromagnetic monitoring device 1 is located in the area where the step chain 4 in the inclined truss 5 is located.
According to another aspect of the present invention, there is also provided a monitoring method using the escalator step chain encircling type distributed monitoring system, comprising the steps of:
(1) Each electromagnetic module of the encircling type electromagnetic monitoring device 1 respectively collects magnetic flux in a corresponding detection area, and the motion positioning device 2 collects position information of detection points of the step chain 4 along the moving direction of the step chain 4 along with the motion of the step chain 4;
(2) The on-site acquisition device acquires the magnetic flux and the position information of the detection point of the step chain 4 along the moving direction of the step chain 4 and uploads the information to the data acquisition processing module through the integrated signal wire 3;
(3) The on-site acquisition device transmits the received position information of all magnetic fluxes of the step chain 4 of the escalator along the moving direction of the step chain 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 detection areas of different electromagnetic modules, and obtains a cross-section point cloud picture formed by magnetic flux detection data of the cross section of the step chain 4, wherein one cross-section point cloud picture is formed by magnetic flux detection data of four detection areas of the same part of the step chain 4, and a plurality of cross-section point cloud pictures exist along the moving direction of the step chain 4;
(5) The remote monitoring terminal screens abnormal section point cloud pictures; the remote monitoring terminal combines and stores the abnormal section point cloud picture and the corresponding position information along the moving direction of the step chain 4, does not combine the normal section point cloud picture and the position information along the moving direction of the step chain 4, compresses the abnormal section point cloud picture separately, stores the abnormal section point cloud picture, and automatically deletes the abnormal section point cloud picture after a period of time.
(6) The remote monitoring terminal analyzes abnormal section point cloud patterns, firstly compares magnetic fluxes collected by two induction coils 13 of the same electromagnetic module, and secondly compares magnetic fluxes detected by different electromagnetic modules to analyze and judge states of detection points of the step chain 4, and the method comprises the following specific steps:
the remote monitoring terminal judges that the detection point of the step chain 4 is defective through comparison if the magnetic fluxes acquired by the two induction coils 13 of the same electromagnetic module are inconsistent, and then the defect of the step chain part corresponding to the detection area formed by the electromagnetic module can be obtained;
the remote monitoring terminal judges the severity of the defect of the detection point of the step chain 4 by comparing the magnetic flux difference degrees detected by different electromagnetic modules;
(7) The remote monitoring terminal generates an analysis result of a detection point of the step chain 4, and adds detection area information of a step chain section where a problematic step chain 4 part is located and position information along the moving direction of the step chain 4, and positions defects along the circumferential direction of the step chain 4 and along the moving direction of the step chain 4;
(8) The remote monitoring terminal performs early warning on the state of the step chain 4 obtained by analysis, and the step chain is divided into a plurality of layers according to the severity of the bad state, and different layers perform early warning in different modes.
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 (9)
1. The utility model provides an automatic staircase step chain encircling formula distribution monitoring system, the step chain includes two rows of step link joint that set up side by side and sets up a plurality of step rollers between these two rows of step link joint, its characterized in that, this monitoring system includes encircling formula 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 step chain moving channel;
Each electromagnetic module comprises an E-shaped magnetic core, an exciting coil and two induction coils, wherein the E-shaped magnetic core comprises a yoke part and three pole arms which extend from the yoke part towards the direction of the through hole, the cross section of the E-shaped magnetic core is E-shaped, the three pole arms are respectively two side pole arms and an intermediate pole arm positioned between the two side pole arms, the exciting coil is arranged on the intermediate pole arm, one induction coil is respectively arranged on each side pole arm, magnetic force lines emitted by the exciting coil pass through a step chain and then pass through the induction coils at two sides to form a closed loop, so that a detection area is formed for detecting magnetic flux; the moving direction of the part, corresponding to the E-shaped iron core, on the step chain is vertical to the cross section of the E-shaped iron core;
The four electromagnetic modules are sequentially arranged on four sides of a rectangle so as to enclose the step chain, detection areas of the electromagnetic modules on two opposite sides of the rectangle are used for covering the step roller, and detection areas of the electromagnetic modules on the other two opposite sides of the rectangle are respectively used for covering the step chain plate on the corresponding side;
The data acquisition processing module is respectively connected with the induction coils of the electromagnetic modules so as to detect defects of the step chain plate and the step roller through the magnetic flux conditions measured by the electromagnetic modules;
The motion positioning device comprises a supporting rod, a roller and an encoder, wherein one end of the supporting rod is arranged on the electromagnetic module mounting frame, the other end of the supporting rod is provided with the roller, the roller is pressed on the step chain plate so as to rotate along with the motion of the step chain plate, and the encoder is arranged on the roller so as to position the step chain through the rotation of the roller;
The data acquisition processing module comprises a field acquisition device and a remote monitoring terminal which can be communicated with the field acquisition device, and the remote monitoring terminal performs early warning on the step chain state obtained by analysis.
2. The encircling type distribution monitoring system for the step chain of the escalator according to claim 1, wherein the movement 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 step chain;
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 encircling type distribution monitoring system of the step chain of the escalator according to claim 1, wherein the electromagnetic module mounting frame comprises a first encircling bracket and a second encircling bracket, the first encircling bracket and the second encircling bracket are right-angle brackets, two electromagnetic modules are respectively installed on the first encircling bracket and the second encircling bracket, 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.
4. The escalator step chain encircling type distribution monitoring system according to claim 3, wherein the electromagnetic modules of the closed loop passing step rollers on the first encircling bracket are provided in plurality and arranged on the same side of a rectangle;
The electromagnetic modules of the closed loop passing through the step rollers on the second encircling support are also arranged in a plurality and are also arranged on the same side of the rectangle, so that the electromagnetic module mounting frame can be used for a plurality of step chains to pass through, and the step chains can be monitored simultaneously.
5. The encircling type distribution monitoring system of the step chain of the escalator according to claim 1, wherein the field acquisition device is respectively connected with induction coils of the electromagnetic modules through integrated signal lines, the remote monitoring terminal processes magnetic fluxes acquired by the encircling type electromagnetic monitoring device, groups the detection areas of the different electromagnetic modules to obtain section point cloud patterns formed by magnetic flux detection data of sections of the step chain, analyzes and judges states of the step chain in the corresponding detection areas through abnormal section point cloud patterns, positions detection areas where defects are located in the sections of the step chain, and accordingly obtains position information of the defects on the sections of the step chain, and the remote monitoring terminal can obtain the position information of the defects in the moving direction of the step chain according to feedback of an encoder.
6. The encircling type distribution monitoring system for the step chains of the escalator according to claim 1, wherein a fixed bracket is arranged on the encircling type electromagnetic monitoring device, the fixed bracket is arranged on a truss of the escalator, and the encircling type electromagnetic monitoring device is positioned in an area where the step chains in the inclined truss are positioned.
7. The monitoring method adopting the encircling type distribution monitoring system for the step chain of the escalator according to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Each electromagnetic module of the encircling type electromagnetic monitoring device respectively collects magnetic flux in a corresponding detection area, and the motion positioning device collects position information of detection points of the step chain along the moving direction of the step chain along with the motion of the step chain;
(2) The on-site acquisition device acquires position information of the magnetic flux and the detection point of the step chain along the moving direction of the step chain and uploads the position information to the data acquisition processing module through the integrated signal wire;
(3) The on-site acquisition device transmits the received position information of all magnetic fluxes of the step chain of the escalator along the moving direction of the step chain 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 according to detection areas of different electromagnetic modules, and a section point cloud chart formed by magnetic flux detection data of sections of step chains is obtained;
(5) The remote monitoring terminal screens abnormal section point cloud pictures;
(6) The remote monitoring terminal analyzes abnormal section point cloud patterns, firstly compares magnetic fluxes collected by two induction coils of the same electromagnetic module, and secondly compares magnetic fluxes detected by different electromagnetic modules to analyze and judge states of detection points of a step chain, and the method comprises the following steps of:
The remote monitoring terminal judges that the detection point of the step chain is defective if the magnetic fluxes acquired by the two induction coils of the same electromagnetic module are inconsistent through comparison;
the remote monitoring terminal judges the severity of the defect of the detection point of the step chain by comparing the magnetic flux difference degrees detected by different electromagnetic modules;
(7) The remote monitoring terminal generates an analysis result of a detection point of the step chain, and adds detection area information of a step chain section where a problematic step chain part is located and position information along the moving direction of the step chain, and positions defects along the circumferential direction of the step chain and along the moving direction of the step chain.
8. The method according to claim 7, wherein in step (5), the remote monitoring terminal merges and stores the abnormal section point cloud image and the corresponding position information along the moving direction of the step chain, and the normal section point cloud image and the position information along the moving direction of the step chain are not merged, are stored after being compressed separately, and are automatically deleted after a period of time.
9. The method of monitoring of claim 7, further comprising: (8) The system is divided into a plurality of layers according to the severity of the bad state, and different layers use different modes for early warning.
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