Real-time online detection device for safety of coal mine steel wire rope
By using a magnetic levitation detection method in underground coal mines, where the suspended target does not contact the wire rope, the problems of wear and jamming caused by mechanical contact are solved, achieving high reliability and low maintenance for wire rope detection.
Patent Information
- Application Number
- CN202510973302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-11-07
AI Technical Summary
Existing underground steel wire rope inspection equipment in coal mines suffers from wear, jamming, and oil adhesion due to mechanical contact in harsh environments, resulting in high inspection reliability and maintenance costs.
The method employs a suspended target that does not physically contact the steel wire rope. It detects surface defects of the steel wire rope through the magnetic levitation effect of the permanent magnet target and the electromagnetic coil, as well as displacement sensors. The target is kept stable and suspended by magnetic field disturbance and compensation current, thus achieving non-contact detection.
It significantly improves the reliability and maintenance-free nature of testing, avoids mechanical wear and oil stain adhesion and jamming problems, and improves the stability and accuracy of testing.
Smart Images
Figure CN120903402A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of safety detection of coal mine operation equipment, and particularly relates to a real-time online detection device for safety of a steel wire rope of a coal mine. BACKGROUND
[0002] The steel wire rope of a coal mine winch device is a core component of a lifting system, and its safety is directly related to the safety of underground operation personnel and the efficiency of coal production. In long-term high-load operation, the steel wire rope is prone to breakage due to wear, fatigue, corrosion or mechanical damage, so it is necessary to detect the surface defects (such as broken wires, wear, flattening, bulging, etc.) of the steel wire rope in real time.
[0003] Traditional detection technology mainly directly contacts the surface of the steel wire rope through a caliper, a roller sensor, etc. to measure the change in rope diameter or surface topography. However, when working in a coal mine, the mechanical contact components of the traditional detection device quickly wear out under long-term friction, and need to be frequently replaced, resulting in high maintenance costs. Coal dust and oil stains in the coal mine environment easily penetrate into the mechanical gap, causing the detection mechanism to jam, resulting in false alarms or missed detections.
[0004] The above problems are further exacerbated in the special environment of a coal mine: Coal dust pollution: fine coal particles in the air adhere to the surface of the detection mechanism, accelerating the wear of mechanical components, and covering the optical or electromagnetic elements of the sensor, resulting in signal attenuation; Oil stain adhesion: winch lubricating oil stains penetrate into the mechanical gap and mix with coal dust to form a viscous substance, increasing the movement resistance of the contact sensor, and even completely jamming.
[0005] Therefore, in view of the above problems, a real-time online detection device for safety of a steel wire rope of a coal mine is proposed, which detects the safety of the steel wire rope without physical contact between the suspended target and the steel wire rope. This fundamentally solves the problems of wear, bearing jamming, and oil stain adhesion caused by mechanical contact during detection of the prior art, greatly improving reliability and maintenance-free performance. SUMMARY
[0006] In order to overcome the problems of jamming, accelerated wear, and signal interference that may occur between the detection device and the steel wire rope during safety detection of the steel wire rope of a coal mine winch device in a harsh coal mine environment.
[0007] The technical scheme of the present application is: a coal mine steel wire rope safety real-time online detection device, comprising a detection frame, a connecting pipe, a mounting pipe, a flange, a detection assembly and a control assembly, one side of the detection frame is provided with the connecting pipe, the other side of the detection frame is provided with the mounting pipe, the inner side of the detection frame is provided with the detection assembly, the outer side of the detection frame is provided with the control assembly, one end of the mounting pipe is provided with the flange, the detection assembly comprises a fixed plate, an electromagnetic coil, a permanent magnet target, a wear-resistant coating and a displacement sensor, the inner side of the detection frame is provided with the fixed plate, the upper side of the fixed plate is provided with the electromagnetic coil, the inner side of the detection frame is provided with the permanent magnet target, the outer side of the permanent magnet target is coated with the wear-resistant coating, and the inner wall top surface of the detection frame is provided with the displacement sensor.
[0008] Preferably, the device and the steel wire rope output input port of the coal mine winch equipment are connected to each other through the flange, the steel wire rope penetrates the mounting pipe, the detection frame and the connecting pipe in sequence, when the steel wire rope is not running or the surface is normal, the permanent magnet target is suspended at the preset initial gap position, and a magnetic suspension effect is generated between the permanent magnet target and the electromagnetic coil to maintain a stable suspension state, the displacement sensor monitors the target position in real time, when the steel wire rope is running, the surface profile changes the spatial distance between it and the nearby permanent magnet target, when the ferromagnetic material steel wire rope approaches or moves away from the permanent magnet target, the magnetic field distribution around the target is disturbed, this magnetic field disturbance breaks the original magnetic force balance of the permanent magnet target, causing the target to be subjected to an additional magnetic force that tends to approach or move away from the steel wire rope, the additional magnetic force is sensed and resisted in real time by rapidly adjusting the coil current to pull the target back to the preset suspension position; the size and direction of the compensation current required to maintain the stability of the target, or the small, resisted displacement trend of the target, directly reflects the strength of the attraction / repulsion force of the steel wire rope surface on the target at that point, and then accurately maps the actual position of the steel wire rope surface at that point, i.e. the profile height, and the displacement trend is captured by the displacement sensor; wherein, when the measured profile height average value decreases, it indicates that the overall rope diameter becomes smaller, i.e. the rope diameter wear condition, when the steel wire rope is locally flattened, the profile height measured by the unit above the flattened part decreases significantly, while the profile height measured by the unit above the bulge increases significantly, thereby fundamentally solving the problems of wear, bearing jamming, oil contamination and sticking caused by mechanical contact during detection in the prior art, and greatly improving the reliability and maintenance-free performance.
[0009] Preferably, the control assembly comprises a controller and a wireless signal transmitter, one side of the detection frame is provided with the controller, and one side of the detection frame is provided with the wireless signal transmitter.
[0010] Preferably, the control assembly further comprises an explosion-proof power supply, and the explosion-proof power supply is arranged below the detection frame.
[0011] Preferably, the outer side of the connecting pipe is provided with a flow guide ring, the side of the flow guide ring is provided with a plurality of groups of nozzles, the plurality of groups of nozzles are annularly distributed on the side of the flow guide ring, the angle of the nozzles is in an inclined state, one side of the flow guide ring is provided with a support, and one end of the support is connected with the detection frame.
[0012] Preferably, the upper side of the flow guide ring is provided with a guide pipe, the upper side of the detection frame is provided with a micro air pump, and the output end of the micro air pump is connected with the guide pipe.
[0013] Preferably, the outer side of the connecting pipe is provided with a fixing frame, and one side of the fixing frame is provided with a motor.
[0014] Preferably, the output end of the motor is provided with a rotating shaft, and the outer side of the rotating shaft is connected with a first gear through a key groove.
[0015] Preferably, the outer side of the connecting pipe is rotatably connected with a second gear, the first gear and the second gear are meshingly connected, one side of the second gear is provided with a connecting rod, one end of the connecting rod is provided with a cleaning frame, and the lower side of the cleaning frame is provided with a brush.
[0016] Preferably, the controller is internally integrated with a suspension control unit, a displacement signal acquisition unit and a data processing unit, the suspension control unit is used for providing a driving current for the electromagnetic coil, the displacement signal acquisition unit is used for reading data of each unit displacement sensor, and the data processing unit includes a suspension control algorithm subunit, a profile height calculation algorithm subunit, a rope diameter calculation subunit and a local defect identification algorithm subunit.
[0017] Preferably, the suspension control algorithm subunit includes the following steps when working: S101: real-time acquisition of a deviation amount of a target actual position and a preset target position measured by a displacement sensor; S102: calculation of a basic compensation current required for maintaining balance of the target according to an amplitude and a direction of the deviation amount of the target actual position and the preset target position, and in combination with a current-force transfer function of the electromagnetic coil; S103: generation of a feedforward current for offsetting a magnetic field gradient change caused by movement by using a preset steel wire rope running speed and a magnetic permeability parameter of a ferromagnetic material; S104: filtering of mechanical vibration noise by using a band-pass filter, and output of a final driving current to the electromagnetic coil 102; The profile height calculation algorithm subunit is used for outputting a relative height change amount of a steel wire rope surface at a measurement point according to a difference between a preset initial gap and a real-time gap between the steel wire rope and the target acquired by the displacement sensor; The rope diameter calculation subunit is used for calculating an arithmetic mean value of profile heights in a same cross section according to the relative height change amount of the steel wire rope surface at the measurement point output by the profile height calculation algorithm subunit, and outputting a real-time rope diameter according to a difference between an initial calibrated rope diameter and twice the average height change amount. The local defect recognition algorithm subunit, when analyzing and recognizing the local damage of the steel wire rope, executes the following steps: S201: If the output real-time rope diameter is less than the crushing threshold, mark it as a crushing area, and if the output real-time rope diameter is greater than the bulge threshold, mark it as a bulge area; S202: Track the marked area in the subsequent time frame, and if the defect duration is greater than the preset minimum effective length, it is confirmed as a real defect; S203: Calculate the defect depth / height, and when the defect depth / height exceeds the preset critical threshold, determine it as a serious defect.
[0018] The beneficial effects of the present application are: The device and the steel wire rope output / input port of the coal mine winch equipment are connected to each other through the flange, the steel wire rope penetrates the installation pipe, the detection frame and the connecting pipe in sequence, when the steel wire rope is not running or the surface is normal, the permanent magnet target is suspended at the preset initial gap position, and a magnetic suspension effect is generated between the permanent magnet target and the electromagnetic coil to maintain a stable suspension state, the target position is monitored in real time by the displacement sensor, when the steel wire rope is running, the surface profile will change the spatial distance between it and the nearby permanent magnet target, when the ferromagnetic material steel wire rope approaches or moves away from the permanent magnet target, the magnetic field distribution around the target will be disturbed, this magnetic field disturbance will break the original magnetic force balance of the permanent magnet target, causing the target to receive an additional magnetic force that tends to approach or move away from the steel wire rope, the coil current is quickly adjusted to sense and resist this additional magnetic force, and the target is pulled back to the preset suspension position; the size and direction of the compensation current required to maintain the stability of the target, or the small displacement trend of the target that is resisted, directly reflects the strength of the attraction / repulsion of the steel wire rope surface at that point to the target, and then accurately maps the actual position of the steel wire rope surface at that point, i.e. the profile height, and the displacement trend is captured by the displacement sensor; wherein, when the average value of the measured profile height decreases, it indicates that the overall rope diameter decreases, i.e. the rope diameter wears out, and when the steel wire rope is locally crushed, the profile height measured by the unit above the crushed part decreases significantly, and the profile height measured by the unit above the bulge part increases significantly, thereby fundamentally solving the problems of wear, bearing jamming, oil sticking and jamming caused by mechanical contact during detection in the prior art, and greatly improving the reliability and maintenance-free performance. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The first three-dimensional structure schematic diagram of the coal mine steel wire rope safety real-time online detection device of the present application is shown; Figure 2 The second three-dimensional structure schematic diagram of the coal mine steel wire rope safety real-time online detection device of the present application is shown; Figure 3The coal mine steel wire rope safety real-time online detection device cross section three-dimensional structure schematic view of the application is shown. Figure 4 The coal mine steel wire rope safety real-time online detection device first partial cross section structure schematic view of the application is shown. Figure 5 The coal mine steel wire rope safety real-time online detection device second partial cross section structure schematic view of the application is shown. Figure 6 The coal mine steel wire rope safety real-time online detection device first partial three-dimensional structure schematic view of the application is shown. Figure 7 The coal mine steel wire rope safety real-time online detection device second partial three-dimensional structure schematic view of the application is shown. The figure mark explanation: 1, detection frame; 2, connecting pipe; 3, installation pipe; 4, flange; 101, fixed plate; 102, electromagnetic coil; 103, permanent magnet target; 104, wear-resistant coating; 105, displacement sensor; 201, controller; 202, wireless signal transmitter; 203, explosion-proof power supply; 301, flow guide ring; 302, spray pipe; 303, support; 304, catheter; 305, micro air pump; 501, fixing frame; 502, motor; 503, rotating shaft; 504, first gear; 505, second gear; 506, connecting rod; 507, cleaning frame; 508, brush. DETAILED DESCRIPTION
[0020] The application will be further described below in combination with the drawings and examples.
[0021] Please refer to Figure 1 and Figure 2 , the application provides an embodiment: a coal mine steel wire rope safety real-time online detection device, including detection frame 1, connecting pipe 2, installation pipe 3, flange 4, detection assembly and control assembly, one side of detection frame 1 is provided with connecting pipe 2, the other side of detection frame 1 is provided with installation pipe 3, the inner side of detection frame 1 is provided with detection assembly, the outer side of detection frame 1 is provided with control assembly, one end of installation pipe 3 is provided with flange 4, detection assembly includes fixed plate 101, electromagnetic coil 102, permanent magnet target 103, wear-resistant coating 104 and displacement sensor 105, the inner side of detection frame 1 is provided with fixed plate 101, the upper side of fixed plate 101 is provided with electromagnetic coil 102, the inner side of detection frame 1 is provided with permanent magnet target 103, the outer side of permanent magnet target 103 is coated with wear-resistant coating 104, the inner wall top surface of detection frame 1 is provided with displacement sensor 105.
[0022] Please refer to Figure 3 , Figure 4 and Figure 5In the embodiment, the control assembly comprises a controller 201 and a wireless signal transmitter 202, the controller 201 is arranged on one side of the detection frame 1, the wireless signal transmitter 202 is arranged on one side of the detection frame 1, the control assembly further comprises an explosion-proof power supply 203, the explosion-proof power supply 203 is arranged below the detection frame 1, in use, the controller 201 provides driving current for the electromagnetic coil 102 to realize stable suspension and force disturbance compensation, and reads the displacement sensor 105 data, the explosion-proof power supply 203 provides the required power supply required for the device to meet the requirements of coal mine operation, and the wireless signal transmitter 202 transmits the data processing result of the controller 201 to the coal mine operation winch house monitoring system through a wireless network.
[0023] Please refer to Figure 6 and Figure 7 In the embodiment, the outer side of the connecting pipe 2 is provided with a flow guide ring 301, a plurality of jet pipes 302 are arranged on the side surface of the flow guide ring 301, the plurality of jet pipes 302 are annularly distributed on the side surface of the flow guide ring 301, the angle of the jet pipe 302 is in an inclined state, one side of the flow guide ring 301 is provided with a support 303, one end of the support 303 is connected with the detection frame 1, a duct 304 is arranged above the flow guide ring 301, a micro air pump 305 is arranged above the detection frame 1, the output end of the micro air pump 305 is connected with the duct 304, in use, the micro air pump 305 is started to guide the airflow in the duct 304 into the flow guide ring 301, the flow guide ring 301 divides the airflow into a plurality of jet pipes 302 and sprays out, the sprayed airflow forms a conical air curtain, reduces the pollutants on the surface of the steel wire rope before entering the detection frame 1, the outer side of the connecting pipe 2 is provided with a fixing frame 501, one side of the fixing frame 501 is provided with a motor 502, the output end of the motor 502 is provided with a rotating shaft 503, the outer side of the rotating shaft 503 is connected with a first gear 504 through a key groove, the outer side of the connecting pipe 2 is rotatably connected with a second gear 505, the first gear 504 and the second gear 505 are engagedly connected, one side of the second gear 505 is provided with a connecting rod 506, one end of the connecting rod 506 is provided with a cleaning frame 507, the lower side of the cleaning frame 507 is provided with a brush 508, in use, the motor 502 is started to drive the first rotating shaft 503 to rotate, the first rotating shaft 503 drives the first gear 504 to rotate, the first gear 504 drives the second gear 505 to rotate, the second gear 505 drives the connecting rod 506 to rotate around the central axis of the steel wire rope, thereby driving the cleaning frame 507 and the brush 508 to rotate around the outer side of the steel wire rope, and the coal dust and oil stains attached to the surface of the steel wire rope are cleaned, and the conical air curtain is used to keep the suspended target area relatively clean.
[0024] The controller 201 is internally integrated with a suspension control unit, a displacement signal acquisition unit and a data processing unit. The suspension control unit is used to provide driving current for the electromagnetic coil 102. The displacement signal acquisition unit is used to read the data of the unit displacement sensor 105. The data processing unit includes a suspension control algorithm subunit, a profile height calculation algorithm subunit, a rope diameter calculation subunit and a local defect identification algorithm subunit. The suspension control algorithm subunit includes the following steps when working: S101: Real-time acquisition of the deviation amount of the actual position of the target measured by the displacement sensor 105 and the preset target position; S102: According to the amplitude and direction of the deviation amount of the actual position of the target and the preset target position, the basic compensation current required to maintain the balance of the target is calculated in combination with the current-force transfer function of the electromagnetic coil 102; S103: The preset running speed of the steel wire rope and the magnetic permeability parameter of the ferromagnetic material are used to generate a feedforward current to offset the magnetic field gradient change caused by movement; S104: The mechanical vibration noise is filtered out by using a band-pass filter, and the final driving current is output to the electromagnetic coil 102; The profile height calculation algorithm subunit is used to output the relative height change amount of the steel wire rope surface at the measurement point according to the difference between the preset initial gap and the real-time gap between the steel wire rope and the target collected by the displacement sensor 105; The rope diameter calculation subunit is used to calculate the arithmetic mean of the profile height in the same cross section according to the relative height change amount of the steel wire rope surface at the measurement point output by the profile height calculation algorithm subunit, and output the real-time rope diameter according to the difference between the initial calibrated rope diameter and twice the average height change amount; The local defect identification algorithm subunit performs the following steps when analyzing and identifying the local damage of the steel wire rope: S201: If the output real-time rope diameter is less than the crushing threshold, mark it as a crushing area. If the output real-time rope diameter is greater than the bulge threshold, mark it as a bulge area; S202: Track the marked area in the subsequent time frame. If the defect length is greater than the preset minimum effective length, it is confirmed as a real defect; S203: Calculate the defect depth / height. When the defect depth / height exceeds the preset critical threshold, it is determined as a serious defect.
[0025] In the process of working, first of all, the installation pipe 3 is connected with the steel wire output input port of the coal mine winch device through the flange 4, and the steel wire is connected in sequence through the installation pipe 3, the detection frame 1 and the connecting pipe 2 to form a detection channel; before starting, the explosion-proof power supply 203 supplies power to the device, and the controller 201 is used for parameter initialization setting, including preset initial gap position of the suspended target, steel wire reference diameter, flattening / bulging threshold and minimum effective length of defect and other key parameters; the miniature air pump 305 is started synchronously, so that the compressed air is injected into the flow guide ring 301 through the conduit 304, and the conical air curtain is sprayed out from the annular distribution of the spray pipe 302, so that the surface of the steel wire about to enter the detection frame 1 is pre-cleaned; at this time, the electromagnetic coil 102 is in standby state, the permanent magnet target 103 is suspended at the preset initial position under the magnetic suspension effect, and the displacement sensor 105 completes self-calibration and establishes the initial position reference; When the winch drives the steel wire to run, the controller 201 implements closed-loop control through the suspension control algorithm subunit: the displacement sensor 105 collects the target position deviation in real time, the suspension control unit calculates the compensation current combined with the current-force model of the electromagnetic coil 102, and offsets the magnetic field gradient change caused by the movement of the steel wire through the feedforward control to maintain the stable suspension of the target; at this time, the profile change of the steel wire surface causes the change of the magnetic coupling strength between the steel wire surface and the target, and the target displacement trend is captured by the displacement sensor 105 and converted into an electrical signal; the profile height calculation algorithm subunit outputs the relative height change of each measurement point on the steel wire surface according to the initial gap and the real-time gap difference; the rope diameter calculation subunit takes the arithmetic mean of multiple groups of height data in the same cross section, and calculates the real-time rope diameter combined with the initial calibration value; the local defect recognition algorithm subunit automatically marks the flattening / bulging area and evaluates the defect severity through threshold comparison and trajectory tracking; In the detection process, the motor 502 drives the first gear 504 to rotate the second gear 505, so that the connecting rod 506 drags the cleaning frame 507 and the brush 508 to revolve around the steel wire axis, and cooperates with the conical air curtain to clean the steel wire surface in a spiral manner, so that the mixture of coal dust and oil stains is effectively removed; the controller 201 synchronously runs the data processing unit, eliminates mechanical vibration noise through a band-pass filter, and ensures the stability of the detection signal; finally, the wireless signal transmitter 202 transmits the real-time rope diameter, defect position and severity and other data to the winch house monitoring system; during the operation of the device, the steel wire does not need to be physically contacted, and the mechanical wear and jamming problem is completely avoided.
[0026] Through the above steps, the device and the steel wire rope output input port of the coal mine winch equipment are connected to each other by the flange 4, the steel wire rope penetrates the installation pipe 3, the detection frame 1 and the connecting pipe 2 in turn, when the steel wire rope is not running or the surface is normal, the permanent magnet target 103 is suspended at the preset initial gap position, and the magnetic suspension effect is generated between the permanent magnet target 103 and the electromagnetic coil 102 to maintain a stable suspension state, the displacement sensor 105 monitors the target position in real time, when the steel wire rope runs, the surface profile changes the spatial distance between the steel wire rope and the nearby permanent magnet target 103, when the ferromagnetic material steel wire rope approaches or moves away from the permanent magnet target 103, the magnetic field distribution around the target is disturbed, the magnetic field disturbance breaks the original magnetic force balance of the permanent magnet target 103, so that the target is subjected to an additional magnetic force which tends to approach or move away from the steel wire rope, the additional magnetic force is sensed and resisted in real time by adjusting the coil current quickly, and the target is pulled back to the preset suspension position; the size and direction of the compensation current required to maintain the stability of the target, or the small displacement trend of the target which is resisted, directly reflects the attraction / repulsion strength of the steel wire rope surface at the point to the target, and then accurately maps the actual position of the steel wire rope surface at the point, that is, the profile height, and the displacement trend is captured by the displacement sensor 105; wherein, when the average value of the measured profile height decreases, it indicates that the overall rope diameter becomes smaller, that is, the rope diameter wear condition, when the steel wire rope is locally crushed, the profile height measured by the unit above the crushed part decreases significantly, and the profile height measured by the unit above the bulge part increases significantly, so that the steel wire rope safety detection method using the non-physical contact between the suspended target and the steel wire rope fundamentally solves the problems of wear, bearing jamming, oil adhesion and jamming caused by mechanical contact during detection in the prior art, and greatly improves the reliability and maintenance-free performance.
[0027] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.
Claims
1. A coal mine steel wire rope safety real-time online detection device, comprising a detection frame (1), a connecting pipe (2), a mounting pipe (3) and a flange (4), characterized in that: It also includes detection components and control components, one side of the detection frame (1) is provided with a connecting pipe (2), the other side of the detection frame (1) is provided with a mounting pipe (3), the inner side of the detection frame (1) is provided with detection components, the outer side of the detection frame (1) is provided with control components, one end of the mounting pipe (3) is provided with a flange (4), the detection components include a fixed plate (101), an electromagnetic coil (102), a permanent magnet target (103), a wear-resistant coating (104) and a displacement sensor (105), the inner side of the detection frame (1) is provided with a fixed plate (101), the upper side of the fixed plate (101) is provided with an electromagnetic coil (102), the inner side of the detection frame (1) is provided with a permanent magnet target (103), the outer side of the permanent magnet target (103) is coated with a wear-resistant coating (104), and the inner wall top surface of the detection frame (1) is provided with a displacement sensor (105).
2. The coal mine steel wire rope safety real-time online detection device according to claim 1, characterized in that: The control components include a controller (201) and a wireless signal transmitter (202), one side of the detection frame (1) is provided with a controller (201), and one side of the detection frame (1) is provided with a wireless signal transmitter (202).
3. The coal mine steel wire rope safety real-time online detection device according to claim 2, characterized in that: The control components further include an explosion-proof power supply (203), and the lower side of the detection frame (1) is provided with an explosion-proof power supply (203).
4. The coal mine steel wire rope safety real-time online detection device according to claim 1, characterized in that: The outer side of the connecting pipe (2) is provided with a flow guide ring (301), a plurality of groups of spray pipes (302) are arranged on the side of the flow guide ring (301), the plurality of groups of spray pipes (302) are arranged in a ring shape on the side of the flow guide ring (301), the spray pipes (302) are inclined, one side of the flow guide ring (301) is provided with a support (303), and one end of the support (303) is connected with the detection frame (1).
5. The coal mine steel wire rope safety real-time online detection device according to claim 4, characterized in that: The upper side of the flow guide ring (301) is provided with a guide pipe (304), the upper side of the detection frame (1) is provided with a micro air pump (305), and the output end of the micro air pump (305) is connected with the guide pipe (304).
6. The coal mine steel wire rope safety real-time online detection device according to claim 1, characterized in that: The outer side of the connecting pipe (2) is provided with a fixing frame (501), and one side of the fixing frame (501) is provided with a motor (502).
7. The coal mine steel wire rope safety real-time online detection device according to claim 6, characterized in that: The output end of the motor (502) is provided with a rotating shaft (503), and the outer side of the rotating shaft (503) is connected with a first gear (504) through a key groove.
8. The coal mine steel wire rope safety real-time online detection device according to claim 7, characterized in that: The outer side of the connecting pipe (2) is rotatably connected with a second gear (505), the first gear (504) and the second gear (505) are meshed, one side of the second gear (505) is provided with a connecting rod (506), one end of the connecting rod (506) is provided with a cleaning frame (507), and the lower side of the cleaning frame (507) is provided with a brush (508).
9. The coal mine steel wire rope safety real-time online detection device according to claim 2, characterized in that: The controller (201) is internally integrated with a suspension control unit, a displacement signal acquisition unit and a data processing unit, the suspension control unit is used for providing driving current for the electromagnetic coil (102), the displacement signal acquisition unit is used for reading data of each unit displacement sensor (105), and the data processing unit includes a suspension control algorithm subunit, a profile height calculation algorithm subunit, a rope diameter calculation subunit and a local defect recognition algorithm subunit.
10. The coal mine steel wire rope safety real-time online detection device according to claim 9, characterized in that: The suspension control algorithm subunit includes the following steps when working: S101: Real-time acquisition of the deviation amount between the actual position of the target measured by the displacement sensor (105) and the preset target position; S102: According to the amplitude and direction of the deviation amount between the actual position of the target and the preset target position, and combined with the current-force transfer function of the electromagnetic coil (102), calculate the basic compensation current required to maintain the balance of the target; S103: Generate a feedforward current to offset the change in magnetic field gradient caused by movement by presetting the running speed of the steel wire rope and the magnetic permeability parameters of the ferromagnetic material; S104: Use a band-pass filter to filter out mechanical vibration noise and output the final driving current to the electromagnetic coil (102); The profile height calculation algorithm subunit is used to output the relative height change of the steel wire rope surface at the measurement point according to the difference between the preset initial gap and the real-time gap between the steel wire rope and the target collected by the displacement sensor (105); The rope diameter calculation subunit is used to calculate the arithmetic mean of the profile height in the same cross section according to the relative height change of the steel wire rope surface at the measurement point output by the profile height calculation algorithm subunit, and output the real-time rope diameter according to the difference between the initial calibrated rope diameter and twice the average height change; The local defect recognition algorithm subunit performs the following steps when analyzing and identifying local damage to the steel wire rope: S201: If the output real-time rope diameter is less than the crushing threshold, mark it as a crushing area, and if the output real-time rope diameter is greater than the bulge threshold, mark it as a bulge area; S202: Track the trajectory of the marked area in the subsequent time frame, and if the defect length is greater than the preset minimum effective length, it is confirmed as a real defect; S203: Calculate the defect depth / height, and if the defect depth / height exceeds the preset critical threshold, it is determined to be a serious defect.