A dual-channel non-contact elevator slip amount detection device

Abstract

The utility model discloses a kind of double-channel non-contact elevator slip amount detection devices, it is related to elevator device technical field, detection device includes first measurement component and second measurement component;First measurement component is used to set in car top and shaft top, first measurement component is used to measure the instantaneous distance between the top of car and the top of shaft in the process of car operation;Second measurement component is used to set in traction machine outside, including reference component and inductive reading component, reference component is coaxially arranged in traction wheel outside and can rotate synchronously with traction wheel, inductive reading component is arranged in reference component side, inductive reading component can induct in the process of reference component rotation, inductive reading component can output effective pulse.The double-channel non-contact elevator slip amount detection device provided by the utility model can improve the accuracy of elevator traction sheave slip amount detection.

Description

Technical Field

[0001] This utility model relates to the field of elevator device technology, and in particular to a dual-channel non-contact elevator slip detection device. Background Technology

[0002] Elevator traction systems rely on the friction between the traction sheave and the wire rope to transmit power, driving the car and counterweight up and down. Safety depends on the long-term stable contact between the two. During operation, the sheave groove and wire rope deteriorate due to factors such as wear, oil contamination, humidity, and tension changes, leading to abnormal slippage unrelated to the drive mechanism. This reduces traction margin and amplifies braking and traction risks, potentially causing accidents such as overshooting or bottoming out. In contrast, under normal operating conditions, the slight relative displacement caused by the elasticity of the wire rope and the micro-deformation of the sheave groove is within an acceptable range. However, if the slippage originates from wear / contamination, it exhibits cumulative and accelerated failure characteristics, requiring accurate identification and quantification. Elevator traction sheave slippage refers to the relative displacement between the traction sheave and the wire rope caused by insufficient friction margin during elevator operation. Its magnitude can be characterized by the difference between the running distance of the traction sheave and the actual distance the car moves due to the wire rope traction. If the slippage exceeds the set safety threshold, it can easily lead to decreased leveling accuracy, insufficient traction capacity, and even induce safety accidents.

[0003] Current methods for detecting slippage between elevator traction sheaves and wire ropes primarily rely on manual marking combined with visual inspection or simple readings. This process is cumbersome and inefficient. More importantly, the conclusions are heavily dependent on operator experience, and subjective differences directly lead to discrete results and poor repeatability, making it difficult to meet the need for quantitative determination of slippage failures. To improve real-time performance, some solutions mechanically couple encoders or rollers to the traction sheave / wire rope. While this allows for continuous data acquisition, long-term contact introduces wear and slippage, causing the signal to drift over time. Furthermore, contact stress distribution and oil contamination vibrations further amplify systematic errors. Utility Model Content

[0004] The purpose of this invention is to provide a dual-channel non-contact elevator slip detection device to solve the problems existing in the prior art and improve the accuracy of elevator traction sheave slip detection.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a dual-channel non-contact elevator slip detection device, including a first measuring component and a second measuring component. The first measuring component is used to be installed on the top of the car and the top of the hoistway, and is used to measure the instantaneous distance between the top of the car and the top of the hoistway during the operation of the car. The second measuring component is installed on the outside of the traction machine, and includes a reference component and a sensing reading component. The reference component is coaxially installed on the outside of the traction sheave and can rotate synchronously with the traction sheave. The sensing reading component is installed on one side of the reference component and can sense during the rotation of the reference component. The sensing reading component can output a valid pulse.

[0006] Preferably, the first measuring component includes a laser rangefinder and a reflective target. The laser rangefinder is disposed on the top of the shaft, and the reflective target is disposed on the top of the car and can move with the car. The optical axis of the laser rangefinder is aligned with the center of the reflective target. The laser rangefinder can emit light waves to the reflective target and receive light waves reflected by the reflective target.

[0007] Preferably, the laser rangefinder is connected to the top of the wellbore via an adjustment component, which can adjust and fix the orientation of the laser rangefinder.

[0008] Preferably, the reference component includes a sector coding ring made of non-metallic material, and a magnetically guided coding strip is uniformly arranged circumferentially on the side of the sector coding ring opposite to the traction sheave. The magnetically guided coding strip includes multiple metal magnetic sheets uniformly distributed along the circumference of the sector coding ring, and each metal magnetic sheet is embedded in the sector coding ring and flush with the side of the sector coding ring. The sensing reading component can generate effective pulses at the junction of each metal magnetic sheet and the sector coding ring during the rotation of the sector coding ring.

[0009] Preferably, the inductive reading assembly includes an inductive reading unit, which is mounted on one side of the reference component via an adjustment bracket. The adjustment bracket can adjust and fix the spatial position of the inductive reading unit. The sensing surface of the inductive reading unit is parallel to the side of the sector encoding ring. As the sector encoding ring rotates with the traction wheel, the junctions of each of the metal magnetic sheets and the sector encoding ring sequentially pass over the inductive reading unit.

[0010] Preferably, a protective cover is provided on the outside of the traction sheave, the reference component is disposed inside the protective cover, and the sensing reading component is disposed outside the protective cover; and a detection window is provided on the protective cover, through which the sensing reading component can sense the reference component.

[0011] Preferably, the reference component is detachably connected to the traction sheave.

[0012] The present invention achieves the following technical advantages over the prior art: The dual-channel non-contact elevator slip detection device provided by this utility model uses a first measuring component to continuously acquire the instantaneous distance between the car and the top of the shaft, and then converts it into the running distance of the wire rope. At the same time, on the traction sheave side, the sensing reading component of the second measuring component senses the reference component that rotates synchronously with the traction sheave during the rotation process, outputs effective pulses, and then converts them into the running distance of the traction sheave. The two measuring channels share a unified time base, and the slip amount is directly obtained from the difference between the two. Through this dual-channel non-contact measurement, data acquisition and judgment can be completed in one trip, which significantly improves the detection efficiency and result consistency, and eliminates the deviation caused by human subjectivity and wear caused by traditional contact measurement. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the installation of the dual-channel non-contact elevator slip detection device provided in Embodiment 1 of this utility model; Figure 2 A schematic diagram illustrating the cooperation between the second measuring component and the traction sheave provided in Embodiment 1 of this utility model; Figure 3 A partial schematic diagram illustrating the cooperation between the sector coding ring and the inductive reading unit provided in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram showing the position of the first measuring component provided in Embodiment 1 of the present invention; Figure 5 A schematic diagram illustrating the cooperation between the laser rangefinder and the adjustment component provided in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the structure of the reflective target provided in Embodiment 1 of this utility model; Figure 7 This is a flowchart illustrating the dual-channel non-contact elevator slip detection method provided in Embodiment 2 of this utility model.

[0015] In the diagram: 1-Car; 2-Hoistway; 3-Traction machine; 4-Protective cover; 5-Inductive incremental reading unit; 6-Adjusting bracket; 7-Laser rangefinder; 8-Reflective target; 9-Traction wheel; 10-Sector coding ring; 11-Inductive sensor head; 12-Fixed base plate; 13-Gimbal. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] The purpose of this invention is to provide a dual-channel non-contact elevator slip detection device to solve the problems existing in the prior art and improve the accuracy of elevator traction sheave slip detection.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1 This embodiment provides a dual-channel non-contact elevator slip detection device. Please refer to [link / reference]. Figures 1-6 The system includes a first measuring component and a second measuring component. The first measuring component is installed on the top of the car 1 and the top of the hoistway 2, and is used to measure the instantaneous distance between the top of the car 1 and the top of the hoistway 2 during the operation of the car 1. The second measuring component is installed on the outside of the traction machine 3, and includes a reference component and a sensing reading component. The reference component is coaxially installed on the outside of the traction sheave 9 and can rotate synchronously with the traction sheave 9. The sensing reading component is installed on one side of the reference component and can sense during the rotation of the reference component. The sensing reading component can output a valid pulse.

[0020] The first measuring component continuously acquires the instantaneous distance between the car 1 and the top of the shaft, and then calculates the running distance of the wire rope. Simultaneously, the second measuring component uses its sensing reading component to sense the reference component that rotates synchronously with the traction sheave 9 during rotation, outputting valid pulses, which are then calculated to obtain the running distance of the traction sheave 9. The two measuring channels share a unified time base, and the slippage is directly calculated from the difference between the two. Through this dual-channel non-contact measurement, data acquisition and judgment can be completed in one trip, significantly improving detection efficiency and result consistency, and eliminating deviations caused by human subjectivity and wear in traditional contact measurements.

[0021] In the optional scheme of this embodiment, more preferably, the first measuring component includes a laser rangefinder 7 and a reflective target 8. The laser rangefinder 7 is disposed on the top of the shaft 2, and the reflective target 8 is disposed on the top of the car 1 and can move with the car 1. The optical axis of the laser rangefinder 7 is aligned with the center of the reflective target 8. The laser rangefinder 7 can emit light waves to the reflective target 8 and receive light waves reflected by the reflective target 8.

[0022] The laser ranging head 7 is a ToF laser ranging head, fixed at the top of the shaft 2. Under the condition of not affecting the normal operation of the elevator, its position is close to the middle of the projection of the car 1 running passage, so that the ranging line of sight is directly facing the top of the car 1 without obstruction. A reflective target 8 is set on the top of the car 1 by bolts, installed in the safe working area and as close as possible to the geometric center of the top plate of the car 1. The target surface is facing upward and kept parallel to the top plate, and the optical axis of the ranging head hits the center of the reflective target 8 and maintains an alignment relationship to ensure stable reflection. The laser ranging head 7 and the reflective target 8 form a single-end round-trip ranging link from the top of the shaft to the top of the car. The laser ranging head 7 completes the transmission and echo reception in the same component, and continuously outputs the instantaneous distance sequence between the two for subsequent conversion of the wire rope running distance.

[0023] In the optional embodiments of this example, more preferably, the laser rangefinder 7 is connected to the top of the well 2 via an adjustment component, which can adjust and fix the orientation of the laser rangefinder 7.

[0024] The adjustment components include a fixed base plate 12 and a gimbal 13. The fixed base plate 12 is first reliably connected to the top crossbeam of the shaft 2 with bolts, serving as the installation reference. A conventional gimbal 13 is then mounted on it, and the laser rangefinder 7 is fixed on the gimbal 13. The light output and receiving ports on the front side of the laser rangefinder 7 serve as the optical axis reference. The gimbal 13 adopts a conventional structure and is used to provide fine-tuning of the pitch and azimuth of the laser rangefinder 7 and can be locked. In terms of assembly sequence, the reflective target 8 is first installed and positioned on the top of the car 1, and then the fixed base plate 12 and the gimbal 13 are installed on the top of the shaft 2. After fixing the laser rangefinder 7, the car 1 is stopped in a position that is easy to aim at. By fine-tuning the gimbal 13, the optical axis of the laser rangefinder 7 is aligned with the center of the reflective target 8 and the alignment is maintained. Then, the fasteners such as locking bolts that lock the gimbal 13 and the fixed base plate 12 are tightened in sequence and marked.

[0025] In an optional embodiment, more preferably, the reference component includes a sector coding ring 10. The sector coding ring 10 is made of non-metallic material, and a magnetically guided coding strip is uniformly arranged circumferentially on the side of the sector coding ring 10 away from the traction wheel 9. The magnetically guided coding strip includes a plurality of metal magnetic sheets uniformly distributed circumferentially along the sector coding ring 10. Each metal magnetic sheet is embedded in the sector coding ring 10 and is flush with the side of the sector coding ring 10. The sensing reading component can generate effective pulses at the junction of each metal magnetic sheet and the sector coding ring 10 during the rotation of the sector coding ring 10.

[0026] The sector coding ring 10 is a non-metallic base disk with a magnetically conductive coding band formed on its outer circumference. Multiple metal magnetic sheets, such as thin sheets of ferromagnetic material, included in the magnetically conductive coding band are evenly distributed circumferentially along the sector coding ring 10 and embedded within it. Thus, the metal magnetic sectors and non-metallic dielectric sectors are evenly distributed and alternately arranged circumferentially in the sector coding ring 10. The boundaries are used to generate clear boundary signals, and the sensing reading component can generate effective pulses at each circumferential boundary. Effective pulses are generated both when entering and leaving the metal magnetic sector. The circumferential dimensions of each metal magnetic sector and each non-metallic dielectric sector are consistent, ensuring that the circumferential dimension corresponding to each effective pulse is consistent.

[0027] In the optional embodiment, more preferably, the inductive reading component includes an inductive reading unit, which is set on one side of the reference component by an adjusting bracket 6. The adjusting bracket 6 can adjust and fix the spatial position of the inductive reading unit. The sensing surface of the inductive reading unit is parallel to the side of the sector coding ring 10. As the sector coding ring 10 rotates with the traction wheel 9, the junction of each metal magnetic sheet and the sector coding ring 10 can sequentially pass over the inductive reading unit.

[0028] The inductive reading unit includes an inductive sensing head 11 and an inductive incremental reading unit 5 connected by communication. The inductive sensing head 11 and the inductive incremental reading unit 5 are integrated into a reading assembly, which can be fixed to the adjustment bracket 6 by bolts or other components. The adjustment bracket 6 is reliably connected to the traction machine 3 base by bolts. The adjustment bracket 6 adopts a conventional adjustment bracket, which can provide fine adjustment in height, front-back and / or left-right directions and can be locked. During assembly, the sensing surface of the inductive sensing head 11 is radially aligned with the center of the magnetic coding strip and kept parallel. A stable working air gap is set between the inductive sensing head 11 and the magnetic coding strip. The axis of the inductive sensing head 11 is aligned with the sector boundary to obtain a steep pulse edge. The inductive incremental reading unit 5 performs debouncing, shaping and minimum pulse width identification on the pulse signal of the inductive sensing head 11, so as to purify and improve the original, weak and easily interfered analog signal generated by the inductive sensing head into a clean, regular and anti-interference standard digital pulse signal. Among them, the inductive sensor head model 11 can be the SICKIME18-08 series, and the inductive incremental reading unit model 5 can be ICPDASI-7088 / I-87082, etc., as long as it can achieve the above-mentioned required functions.

[0029] In the optional embodiment, more preferably, a protective cover 4 is used to cover the outside of the traction wheel 9, a reference component is disposed inside the protective cover 4, and a sensing reading component is disposed outside the protective cover 4; and a detection window is provided on the protective cover 4, so that the sensing reading component can sense the reference component through the detection window.

[0030] The protective cover 4 is bolted to the outer shell of the traction machine 3 to cover the area between the traction wheel 9 and the reference component. A detection window is opened at the corresponding position of the sector coding ring 10 so that the inductive sensor head 11 can be inserted and perform sensing work. The main body of the protective cover 4 is made of non-magnetic material to prevent dust, oil mist, splashes, and reduce external electromagnetic coupling. After assembly, the rotation of the traction wheel 9 drives the magnetic coding strip of the sector coding ring 10 to pass over the inductive sensor head 11 in sequence, generating incremental pulses at each sector boundary and counting them in the inductive incremental reading unit 5, continuously outputting the running distance of the traction wheel 9. The adjusting bracket 6 ensures the long-term stability of the relative geometric relationship and air gap between the inductive sensor head 11 and the sector coding ring 10, while the protective cover 4 provides dual protection against environmental and electromagnetic interference, thereby achieving reliable measurement of the running distance of the traction wheel 9.

[0031] In an optional embodiment, more preferably, the reference component is detachably connected to the traction sheave 9.

[0032] The reference component is installed on a pre-set bracket on the outside of the traction sheave 9, coaxial with the traction sheave 9 and rotating synchronously with the sheave. The bracket is quick-mounted and detachable. Alternatively, the reference component can be directly fixed to the traction sheave 9 by adhesive bonding, which reduces damage to the traction sheave 9 and facilitates installation and disassembly.

[0033] Example 2 This embodiment provides a dual-channel non-contact elevator slip detection method, such as... Figure 7 As shown, the dual-channel non-contact elevator slip detection device in Embodiment 1 includes the following steps: Total running distance of the wire rope in a time period Measurement: The instantaneous distance sequence between the top of the car 1 and the top of the hoistway 2 is continuously measured by the first measuring component, namely the ToF laser ranging device. and during that time period The actual distance traveled by car 1 over the time period is obtained by accumulating and summing the data. And obtain the total running distance of the wire rope during that time period. ; Total travel distance of traction sheave 9 within the same time period Measurement: The total number of valid pulses is obtained by summing the number of valid pulses output by the second measurement component, i.e., the inductive incremental encoder, within the same time period. And obtain the running distance of traction wheel 9 within the same time period. ; Obtaining and determining slippage: The total running distance of the wire rope Total travel distance with traction sheave 9 The difference is obtained by taking the subtraction within the same time period: ; In the formula, This represents the slippage.

[0034] More preferably, the specific process of the wire rope running distance detection method is as follows: In the steel wire rope Total running distance over the time period During the measurement, the laser rangefinder 7 at the top of the shaft 2 continuously emits low-power laser light towards the passive reflective target 8 on the top of the car 1 and receives the echo, thus measuring the instantaneous distance sequence between the shaft top and the car top. The distance measurement relationship is as follows: ; in For vacuum light speed, For air refractive index, The round-trip time of a light wave; the time it takes for an elevator to complete one cycle. The change in the value corresponds to the travel distance of car 1; the travel distance of car 1 is then determined by the rope winding ratio. The actual running distance of the wire rope can be obtained by conversion.

[0035] Specifically, (1) Start the data acquisition: After the equipment is powered on, the elevator starts running, and the laser rangefinder 7 continuously acquires and records the distance sequence. Based on the origin time of this train Finish time The entire data segment is marked, and recording continues uninterrupted even during stops or reversals; the laser rangefinder 7... Internally, continuously outputs the instantaneous distance between the shaft top and the car top. Sampling by time yielded: ; (2) Since the measured quantity is the instantaneous distance from the top of the hoistway 2 to the top of the car 1. To obtain the speed of car 1 in one travel interval The actual operating distance within the range, to cope with The absolute value of the change over time is taken and accumulated within the interval, and then summed using discrete difference: ; (3) The car 1 obtained from the previous step is in the interval Actual running distance within According to the elevator suspension rope ratio (That is, the number of effective rope segments directly supporting car 1. If the number of effective rope segments is 1:1, take...) , 2:1 By converting the data (and so on), the total running distance of the wire rope in this operation can be obtained: ; That is, the wire rope distance is obtained by ToF laser ranging; during a single elevator trip, the laser ranging head 7 continuously outputs the distance change from the top of the shaft to the top of the car 1. Within the same trip's data, the system selects a short time interval with stable readings before startup and after arrival, and averages the multiple readings within each interval as the starting and ending distances for that trip; the difference between the two is the displacement of car 1 in that trip, which is then converted into the wire rope running distance according to the elevator's rope ratio. If there is a stop or reversal during the trip, the entire trip is divided into several continuous "running segments" based on the stops. Each segment is bounded by the stationary interval before startup and the stationary interval after arrival: the average distance within these two intervals is taken as the starting and ending distances of that segment, and the absolute value of the difference is the displacement of that segment. The displacements of all running segments in the trip are added together to obtain the wire rope running distance for that trip.

[0036] More preferably, the specific process of the traction sheave 9 running distance detection method is as follows: the traction sheave 9 in Total running distance in the same time period In the measurement, (1) After the device is installed, the elevator is started to run and measurements are taken; the sector coding ring 10 rotates coaxially with the traction sheave 9, and the inductive sensor head 11 is aligned with the magnetic coding strip and a stable air gap is set; after the measurement of one run begins, the sector coding ring 10 rotates with the traction sheave 9; whenever the boundary between the metal magnetic sector and the non-metallic medium sector passes the inductive sensor head 11, the inductive sensor head 11 outputs an effective pulse; the inductive incremental reading unit 5 performs debouncing and shaping on the pulse signal, and from the start time of this run... Start the absolute cumulative number of valid pulses.

[0037] To convert the effective pulse quantity into physical distance, two constants are defined: the number of effective pulses per revolution. : equals the total number of boundaries within one loop of the sector coding ring 10. equivalent radius : The radius of motion of the neutral layer of the wire rope around the traction axis during actual elevator operation. Systematic deviations will occur due to changes in rope groove wear, rope insertion depth, contact compression, and wrap angle. To ensure the accuracy of distance measurements, an equivalent radius is used. To replace the 9-section radius of the traction sheave.

[0038] Car 1 crosses the first The actual displacement of adjacent floors is At the same time, the number of pulses in this segment is counted. ,get: ; By merging the multiple data segments, we obtain: ; The angular displacement corresponding to each valid pulse is: ; The circumference length corresponding to each valid pulse is: ; In the formula, For equivalent radius The corresponding equivalent perimeter.

[0039] (2) During each operation, pulse accumulation is completed within the inductance increment reading unit 5. From the start to the end of one operation... Within the range, the inductance increment reading unit 5 performs absolute accumulation for each valid pulse: it adds 1 whenever the boundary passes through the inductive sensor head 11, regardless of forward or reverse rotation; it does not revert in the reverse direction or add pulses when stopped. The total number of valid pulses up to the endpoint is recorded as follows: ; In the When each pulse arrives (time) This allows you to directly obtain the cumulative angle and cumulative distance of the operation: ; (3) After the operation is completed, output the total running distance. If the termination time is... If the output falls exactly after a certain pulse arrives, it will be output directly: ; like Located between two adjacent valid pulses. To avoid discontinuous steps at the endpoint mileage, the reading unit uses time-proportional interpolation to estimate the continuity of a "pulse that has not been fully traversed": Let the time of the last reached pulse be... The estimated arrival time of the next pulse is ,get: ; The total running distance of the traction sheave 9 in continuous operation is: ; Obtaining and determining the slip amount: During the same run, align the start and end times of the two channels as follows: Firstly, the distance curve of the laser measurement channel in shaft 2 is processed according to the aforementioned steps and multiplied by the suspension rope ratio. The distance traveled by the wire rope in this trip was obtained. Secondly, the inductance incremental encoding channel accumulates pulses and performs fractional pulse interpolation as described above to obtain the running distance of the traction sheave 9 in this trip. Comparing the two on the same time base, the slip amount for this pass is defined as: ; The data measured by the two non-contact channels, laser ranging at the top of shaft 2 and inductive incremental encoding of traction sheave 9, are transmitted to the elevator's central control box for distance conversion. The distances of the steel wire rope and traction sheave 9 obtained from the same trip are then compared after being aligned with the time interval; the difference represents the slippage for that trip, which is used for judgment and alarm. Both channels are non-contact measurements with fixed installation positions and clear measurement calibers, allowing for direct online detection and traceability analysis of slippage. Furthermore, trips with multiple stops can be accumulated in segments, making them suitable for different suspension ratios and long shaft 2 scenarios.

[0040] The dual-channel non-contact elevator slip detection device and method provided by this utility model have the following technical effects: To address the issues of low efficiency and high subjectivity, this invention employs two non-contact channels: laser ranging at the top of the shaft and inductive incremental encoding of the traction wheel 9. In the same run, the travel distance of the wire rope and the travel distance of the traction wheel 9 are obtained separately, and the slippage is directly calculated by subtracting them under the same time base. Data acquisition and judgment can be completed in one run, significantly improving detection efficiency and result consistency.

[0041] To address the issues of existing optical ranging being susceptible to scattering and jitter, this invention mounts a laser ranging head 7 on the top gimbal 13 of the shaft 2, aligns it with the reflective target 8 on the car top, continuously records the distance from the shaft top to the car top, and accumulates the total displacement by the absolute change in the distance curve. This eliminates the need for manual segmentation and direction determination, adapts to multiple starts, stops, and reversals, and ensures stable and reliable calculation of the wire rope travel.

[0042] To address the issues of easy wear and complex direction determination in existing contact-type devices, this invention features a magnetically coded strip on the outer circumference of the traction wheel 9. A single inductive sensor head 11 senses and accumulates boundary events, covering the entire range regardless of whether the rotation is forward or reverse. At the endpoint, time-ratio interpolation is used to supplement any missing pulse share, resulting in a continuous and smooth output of the traction wheel 9 mileage, avoiding mileage jumps and misjudgments.

[0043] To address the difficulties in data stitching caused by multiple dockings and the requirements for quantitative evidence in regulatory scenarios, this invention incorporates a unified time base and segment accumulation mechanism in both channels. It automatically aggregates each "start-to-stop" segment into the slip volume for this trip and can subsequently output health indicators such as slip rate, echo quality, and pulse jitter based on the data. These indicators can be used for trend monitoring, threshold alarms, and evidence collection, meeting the application needs of long shafts and complex environments.

[0044] In summary, this utility model achieves high-precision, zero-additional-wear, rapid retrofitting, and robust slip detection capabilities, making up for the shortcomings of existing manual visual and contact-based solutions in terms of efficiency, accuracy, and adaptability. It is suitable for complex working conditions such as long shafts and dusty or oily environments, and is conducive to improving elevator operation safety and maintenance management.

[0045] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A dual-channel non-contact elevator slip detection device, characterized in that: include A first measuring component is provided at the top of the car and the top of the hoistway, and the first measuring component is used to measure the instantaneous distance between the top of the car and the top of the hoistway during the operation of the car; The second measuring component is used to be installed on the outside of the traction machine. It includes a reference component and a sensing reading component. The reference component is coaxially installed on the outside of the traction sheave and can rotate synchronously with the traction sheave. The sensing reading component is installed on one side of the reference component. The sensing reading component can sense the rotation of the reference component and can output a valid pulse.

2. The dual-channel non-contact elevator slip detection device according to claim 1, characterized in that: The first measuring component includes a laser rangefinder and a reflective target. The laser rangefinder is disposed on the top of the shaft, and the reflective target is disposed on the top of the car and can move with the car. The optical axis of the laser rangefinder is aligned with the center of the reflective target. The laser rangefinder can emit light waves to the reflective target and receive light waves reflected by the reflective target.

3. The dual-channel non-contact elevator slip detection device according to claim 2, characterized in that: The laser rangefinder is connected to the top of the wellbore via an adjustment component, which can adjust and fix the orientation of the laser rangefinder.

4. The dual-channel non-contact elevator slip detection device according to claim 1, characterized in that: The reference component includes a sector coding ring made of non-metallic material. A magnetically guided coding strip is evenly distributed circumferentially on the side of the sector coding ring opposite to the traction sheave. The magnetically guided coding strip includes multiple metal magnetic sheets evenly distributed circumferentially along the sector coding ring. Each metal magnetic sheet is embedded within the sector coding ring and flush with its side surface. The sensing reading component can generate effective pulses at the junctions of the metal magnetic sheets and the sector coding ring during rotation.

5. The dual-channel non-contact elevator slip detection device according to claim 4, characterized in that: The sensing reading assembly includes an inductive reading unit, which is mounted on one side of the reference component via an adjustment bracket. The adjustment bracket can adjust and fix the spatial position of the inductive reading unit. The sensing surface of the inductive reading unit is parallel to the side of the sector encoding ring. As the sector encoding ring rotates with the traction wheel, the junction of each of the metal magnetic sheets and the sector encoding ring sequentially passes over the inductive reading unit.

6. The dual-channel non-contact elevator slip detection device according to claim 1, characterized in that: The outer side of the traction sheave is covered with a protective cover, the reference component is disposed inside the protective cover, and the sensing and reading component is disposed outside the protective cover; and the protective cover is provided with a detection window, through which the sensing and reading component can sense the reference component.

7. The dual-channel non-contact elevator slip detection device according to claim 1, characterized in that: The reference component is detachably connected to the traction sheave.

Images