Length measuring device for elevator compensation chain

Abstract

The invention provides an elevator compensation chain length measuring device, and relates to the technical field of mechanical automation, the technical key points are that the elevator compensation chain length measuring device comprises a support frame and a length measuring sensor, two groups of symmetrical stabilizing devices are arranged above the support frame, each stabilizing device comprises two stabilizing rolling shafts extending along the width direction of the support frame and a stabilizing belt, a pressing device is arranged above each stabilizing device, each pressing device comprises a pressing rolling shaft corresponding to the corresponding stabilizing rolling shaft and a pressing belt, and a driving device is arranged above each pressing device to drive the corresponding pressing device to move in the vertical direction; a motor sliding table is arranged on the supporting frame and used for adjusting the position of the length measuring sensor. The length measuring sensor is not affected by the surface smoothness of the compensation chain in the measuring process, meanwhile, vibration and friction borne by the compensation chain in the length measuring process are reduced through the pressing device and the stabilizing device, and therefore the possibility of errors is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical automation, and in particular to a length measuring device for an elevator compensating chain. Background Art

[0002] The elevator compensating chain is a key component in the elevator system, used to compensate for weight fluctuations and ensure smooth movement during descents. During the compensating chain production process, the length of the chain must be measured, shortened, and packaged according to customer specifications. Existing methods for measuring the length of compensating chains during transportation can be broadly categorized as contact or non-contact. Contact methods utilize the friction of the compensating chain to rotate a meter wheel, measuring the number of revolutions, or by rotating the upper and lower tracks to drive the compensating chain and read the number of turns of the synchronous pulley. Non-contact methods generally use laser measurement, calculating the speed and length based on the time difference between the emitted laser and the received reflected light. Contact measurement suffers from a certain degree of accuracy due to friction. Existing non-contact measurement methods are expensive and have high environmental requirements, making them less suitable for factory needs. Therefore, developing a cost-effective and environmentally adaptable elevator compensating chain length measurement device is crucial for improving compensating chain length measurement efficiency and reducing compensating chain wear.

[0003] For example, the patent application number is 202410971502.2, and the name is "A method and device for measuring the length of an adaptive elevator compensation chain". The overall length measurement system of this patent adopts a fixed structural design. After completing the measurement operation of a single model of compensation chain, there is a problem of insufficient equipment adaptability when switching to multiple specifications of products, and there is a risk of interference between the length measurement sensor and the object to be measured; the three-axis slide positioning mechanism needs to perform a mechanical coordinate reset operation after the compensation chain is replaced, and there is a technical defect of cumbersome secondary calibration process of the positioning coordinates, which significantly increases the time cost during the product changeover process; although the four sets of adjustable limit devices can realize the basic positioning function, they are affected by the cumulative error of the mechanical gap, resulting in a systematic offset error in the relative spatial posture of the compensation chain and the distance measurement sensor, which directly affects the accuracy of the microcontroller's recognition of the reference positioning point; a rigid contact constraint mode is adopted between the limit mechanism and the compensation chain, which is easy to cause high-frequency micro-vibration and friction coupling effect on the contact surface during the measurement process, resulting in nonlinear distortion errors in the measurement data. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that a rigid contact constraint mode is adopted between the limit mechanism and the compensation chain, which easily induces high-frequency micro-vibration and friction coupling effect of the contact surface during the measurement process, resulting in nonlinear distortion errors in the measurement data.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A length measuring device for an elevator compensation chain includes a support frame and a length measuring sensor. Two groups of stabilizing devices that are symmetrical along the length direction of the support frame are arranged above the support frame. Each of the stabilizing devices includes two stabilizing rollers extending along the width direction of the support frame and a stabilizing belt sleeved outside the stabilizing rollers. A clamping device is arranged above each of the stabilizing devices. The clamping device includes a clamping roller corresponding to the stabilizing roller and a clamping belt sleeved outside the clamping roller. A driving device is arranged above the clamping device to drive the clamping device to move in the vertical direction. A motor slide is provided on the support frame between the two groups of stabilizing devices for adjusting the Z-axis and X-axis directions of the length measuring sensor.

[0007] Preferably, the driving device includes a fixed plate and a driving cylinder located on the fixed plate, the fixed plate and the support frame are fixedly arranged, the cylinder barrel of the driving cylinder is fixed on the fixed plate and pointed downward, the end of the piston rod of the driving cylinder is connected to a U-shaped connecting frame, the opening of the U-shaped connecting frame points downward and extends along the length direction of the support frame, the two clamping rollers are located at both ends of the length direction of the U-shaped connecting frame and at the opening of the U-shaped connecting frame, and the clamping rollers are rotatably arranged on the U-shaped connecting frame.

[0008] Preferably, a pushing cylinder is provided on the support frame, and the pushing cylinder is located between the two stabilizing devices. The pushing cylinder extends along the width direction of the support frame, and the end of the pushing cylinder is connected to the motor slide for driving the length measuring sensor.

[0009] Preferably, there are two motor slides, which are a Z-axis motor slide and an X-axis motor slide respectively. Each motor slide includes two fixed seats and sliders. The two fixed blocks are connected by a connecting plate. The slider is slidably arranged along the length direction of the connecting plate. The fixed seat on one side of the Z-axis motor slide is connected and fixed to the piston rod of the ejection cylinder. The slider on the Z-axis motor slide is fixedly connected to the connecting plate on the X-axis motor slide, and the length measuring sensor is fixedly arranged on the slider of the X-axis motor slide.

[0010] Preferably, the motor slide also includes a screw rod, a drive motor and a guide rod, the screw rod is rotatably set on the two fixed seats, the drive motor is set on the outside of one of the fixed seats and is connected to the screw rod; the slider is rotatably set on the screw rod, the guide rod is located between the two fixed seats and parallel to the screw rod, and the guide rod is set through the slider.

[0011] Preferably, the two self-adapting adjusting devices are arranged on the sides of the two stabilizing devices away from each other, and each of the self-adapting adjusting devices comprises a sliding rail fixed on the support frame and extending along the width direction of the support frame, and two clamping parts, one of which is fixed on one end of the sliding rail in the rail direction, and the other of which is arranged to slide along the rail direction of the sliding rail.

[0012] Preferably, the clamping part comprises a base, a sliding part and a plurality of rubber wheels, the sliding part is arranged to slide above the sliding rail, a limiting bolt is arranged on the side of the sliding part and abuts against the sliding rail, and the position between the sliding part and the sliding rail is limited by the limiting bolt; the base is cuboid, the length direction of the base is perpendicular to the rail direction of the sliding rail, and the rubber wheels are arranged in an array along the length direction of the base.

[0013] Preferably, the two self-adapting adjusting devices are arranged on the sides of the two stabilizing devices away from each other, and each of the self-adapting adjusting devices comprises a sliding rail fixed on the support frame and extending along the width direction of the support frame, and two clamping parts, one of which is fixed on one end of the sliding rail in the rail direction, and the other of which is arranged to slide along the rail direction of the sliding rail.

[0014] Preferably, the stabilizing device further comprises an L-shaped plate, two L-shaped plates are arranged on each of the stabilizing devices, the two L-shaped plates are arranged at the two ends of the width direction of the support frame, the two L-shaped plates are symmetrically arranged, the horizontal sections of the two L-shaped plates are fixed on the top of the support frame, two stabilizing rollers are arranged at the two ends of the length direction of the L-shaped plate and between the two L-shaped plates, and the stabilizing rollers are rotatably arranged on the L-shaped plate.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] 1. By arranging the chain pressing device and the chain stabilizing device, the surface smoothness of the compensation chain does not affect the measurement process, and the vibration and friction of the compensation chain during the length measurement process are reduced, thereby reducing the possibility of error and further improving the measurement accuracy.

[0017] 2. By arranging the two motor sliding tables, the pneumatic positioning execution module (pushing cylinder) and the X / Z-axis high-precision motor sliding table form a driving mechanism, and through the linear driving output of the cylinder and the precise servo control of the two-axis sliding table, a multi-degree-of-freedom rapid positioning / reset mechanism is formed.

[0018] 3. By setting up tie rod encoders orthogonally arranged in the X and Z axes, the tie rod encoders form a data path with the microcontroller unit (MCU) via an analog-to-digital converter (ADC) module, acquiring and quantifying linear displacement in the orthogonal axes in real time. This configuration enables the length measurement device to simultaneously obtain millimeter-level position feedback signals in the X and Z planes, achieving dynamic compensation and correction of the length measurement sensor's detected position, effectively eliminating control deviations caused by mechanical backlash errors in the distance measurement system.

[0019] 4. Through the setting of the pull rod encoder, the measuring distance can be automatically corrected during the measurement process, which improves the measurement accuracy and shortens the time for repeated positioning of the length measurement system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an elevator compensating chain length measuring device in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a partial method of an elevator compensating chain length measuring device in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of an elevator compensating chain length measuring device from another angle according to one embodiment of the present invention;

[0023] Figure 4 For example Figure 3 A magnified schematic diagram of part A;

[0024] Figure 5 This is a schematic diagram of electrical connections of a control device in one embodiment of the present invention;

[0025] Figure 6 The present invention is a flowchart of an elevator compensating chain length measuring device in use according to one embodiment of the present invention.

[0026] Figure 7 This is a block diagram of a control system in one embodiment of the present invention;

[0027] Figure 8 A software flow chart in one embodiment of the present invention;

[0028] Figure 9 This is a flow chart of a Kalman filter algorithm in one embodiment of the present invention;

[0029] Figure 10 This is a flow chart of a peak detection algorithm in one embodiment of the present invention;

[0030] Figure 11 This is a dimensional diagram of the mechanical structure of a compensation chain in one embodiment of the present invention;

[0031] Figure 12The original signal and filtering collected in the embodiment;

[0032] Figure 13 This is the peak detection result diagram.

[0033] Legend:

[0034] 1. Support frame; 11. Angle code connector; 2. Chain clamping mechanism; 21. Adaptive adjustment device; 211. Slide rail; 212. Clamping part; 2121. Base; 2122. Sliding part; 2123. Rubber wheel; 22. Stabilizing device; 221. L-shaped plate; 222. Stabilizing roller; 223. Stabilizing belt; 23. Clamping device; 231. Fixed bracket; 232. Driving device; 2321. Fixed Plate; 2322, driving cylinder; 233, pressing part; 2331, U-shaped connecting frame; 2332, pressing roller; 2333, pressing belt; 3, chain measuring mechanism; 31, ejection cylinder; 32, motor slide; 321, fixing seat; 3211, connecting plate; 3212, guide rod; 322, screw rod; 323, driving motor; 324, slider; 33, length measuring sensor; 34, pull rod encoder. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to specific embodiments.

[0036] See also Figure 1 and Figure 2 An elevator compensating chain length measuring device includes a support frame 1, a chain clamping mechanism 2 and a chain measuring mechanism 3. The support frame 1 is used to support the chain clamping mechanism 2 and the chain measuring mechanism 3. The chain clamping mechanism 2 is used to fix the position of the elevator compensating chain. The chain measuring mechanism 3 is used to measure the length of the elevator compensating chain. During the measurement process, the compensating chain needs to be moved for length measurement. The movement of the compensating chain is mainly caused by external force or traction by a traction machine.

[0037] See also Figure 1 The support frame 1 is a rectangular frame. In one embodiment, the support frame 1 is made of high-strength aluminum alloy profiles, and its frame structure is modularly assembled through angle code connectors 11. The support frame 1 has a vertical height adjustable function, which can adapt to the height constraints of different factory spaces; the chain clamping mechanism 2 and the chain measuring mechanism 3 are located at the top of the support frame 1.

[0038] See also Figure 1The chain clamping mechanism 2 is provided with two, and the two chain clamping mechanisms 2 are symmetrically arranged along the center of the length direction of the support frame 1. The chain clamping mechanism 2 includes an adaptive adjustment device 21, a stabilizing device 22, and a clamping device 23. The two adaptive adjustment devices 21 are located at both ends of the length direction of the support frame 1, and the stabilizing device 22 is located between the two adaptive adjustment devices 21 and is used to support the compensation chain located on the two adaptive adjustment devices 21. The clamping device 23 is located on top of the stabilizing device 22 and is used to clamp the compensation chain located on the stabilizing device 22.

[0039] See also Figure 1 and Figure 2 Each of the adaptive adjustment devices 21 includes a slide rail 211 and two clamping parts 212, wherein the slide rail 211 extends along the width direction of the support frame 1 and is fixed to the top of the support frame 1, and the clamping part 212 is slidably arranged along the track direction of the slide rail 211, and the two clamping parts 212 respectively include a base 2121, a sliding part 2122 and a rubber wheel 2123, wherein the sliding part 2122 is slidably arranged above the slide rail 211, and a member passing through the sliding part 2122 and abutting against the sliding part 2123 is provided on the side of the sliding part 2122. The limiting bolts on the slide rail 211 limit the position between the sliding portion 2122 and the slide rail 211. The base 2121 is a rectangular parallelepiped, with its length perpendicular to the direction of the slide rail 211. A plurality of rubber wheels 2123 are provided, arranged in an array along the length of the base 2121. The rotation axes of the rubber wheels 2123 are perpendicular to the horizontal plane of the base 2121, and the rubber wheels 2123 are rotatably mounted on the base 2121. The adaptive adjustment device 21 allows the chain to remain in the proper position even when the model of the compensation chain changes by adjusting the position between the two sliding portions 2122. Furthermore, in one embodiment, one of the sliding portions 2122 is fixed while the other is slidable. When the compensation chain passes through the adaptive adjustment device 21, the compensation chain can be consistently constrained within a preset tension threshold between the fixed and sliding ends.

[0040] See also Figure 1 and Figure 2The stabilizing device 22 includes an L-shaped plate 221, a stabilizing roller 222 and a stabilizing belt 223, wherein two L-shaped plates 221 are respectively provided on each of the stabilizing devices 22, and the two L-shaped plates 221 are located at both ends of the width direction of the support frame 1. The two L-shaped plates 221 are symmetrically arranged, and the horizontal sections of the two L-shaped plates 221 are fixed to the top of the support frame 1. In one embodiment, the L-shaped plate 221 is fixed to the top of the support frame 1 by fixing bolts.

[0041] The stabilizing roller 222 is located between the two L-shaped plates 221, and a plurality of the stabilizing rollers 222 are provided. The plurality of stabilizing rollers 222 extend along the frame direction of the support frame 1. The plurality of stabilizing rollers 222 are respectively located in the middle of the length direction of the L-shaped plate 221 and arranged in sequence towards both ends. The stabilizing rollers 222 are arranged on the L-shaped plate 221 in a circumferential direction. In one embodiment, the surface of the stabilizing rollers 222 is coated with a multi-layer composite wear-resistant polyurethane buffer belt. The stabilizing belt 223 is arranged around the outer circumference of the two stabilizing rollers 222. The stabilizing device 22 is provided to form a radial elastic constraint on the compensation chain located on the stabilizing belt 223, forming a closed-loop dynamic contact interface, thereby achieving three-dimensional spatial limitation of the motion trajectory of the compensation chain. The elastic contact surface formed on the surface of the stabilizing belt 223 improves the impact energy absorption rate between the compensation chain and the support surface. At the same time, the lateral vibration amplitude is effectively suppressed by optimizing the interface friction coefficient, which can extend the service life of the chain drive system under continuous production conditions.

[0042] The clamping device 23 is arranged above the stabilizing device 22. The clamping device 23 is arranged corresponding to the stabilizing device 22. Each of the clamping devices 23 includes a fixed bracket 231, a driving device 232, and a clamping portion 233. The fixed bracket 231 is connected to the support frame 1. The driving device 232 is located on the fixed bracket 231. The clamping portion 233 is located below the driving device 232. The driving device 232 drives the clamping portion 233 to move in the vertical direction to support the top of the stabilizing device 22.

[0043] In one embodiment, the fixing bracket 231 is identical to the support frame 1 and is constructed of aluminum alloy profiles. The fixing bracket 231 has an L-shaped cross-section in the vertical direction, and the vertical section of the fixing bracket 231 is connected to the support frame 1. In one embodiment, the vertical section of the fixing bracket 231 is integrally provided with a vertical rod provided vertically on the support frame 1. The horizontal section of the fixing bracket 231 is located at the top of the vertical section, and the horizontal section of the fixing bracket 231 is located on the side of the vertical section pointing toward the support frame 1.

[0044] The drive mechanism 232 includes a horizontal fixed plate 2321 and a drive cylinder 2322 located on the fixed plate 2321. The cylinder barrel of the drive cylinder 2322 is fixed to the fixed plate 2321 and is positioned downward. The drive cylinder 2322 conforms to the ISO 15552 standard and achieves precise axial displacement of 125 mm, forming a constant pressure contact interface of 0.1-0.2 MPa between the working surface of the compensation chain and the stabilizer 22.

[0045] The pressing portion 233 includes a U-shaped connecting frame 2331, a pressing roller 2332, and a pressing belt 2333. The opening of the U-shaped connecting frame 2331 points downward and extends along the length direction of the support frame 1. The top of the U-shaped connecting frame 2331 is connected to the driving cylinder 2322, and the height of the U-shaped connecting frame 2331 is adjusted by the driving cylinder 2322.

[0046] The plurality of clamping rollers 2332 are respectively located in the middle of the length direction of the U-shaped connecting frame 2331 and extend in sequence to both ends, and are located at the opening of the U-shaped connecting frame 2331. The clamping rollers 2332 are rotatably arranged on the U-shaped connecting frame 2331. In one embodiment, the clamping rollers 2332 overlap with the projections of the stabilizing rollers 222 on the horizontal plane. The clamping belt 2333 is arranged around the two clamping rollers 2332. By driving the synchronous linkage output of the cylinder 2322, the two groups of clamping rollers 2332 are driven to implement symmetrical dynamic constant pressure loading on the compensation chain, ensuring that the working surface of the compensation chain and the load-bearing plane achieve full-time domain line contact coupling. The clamping device 23 provided in this application can effectively eliminate the vertical displacement deviation caused by inertial impact during the transmission process of the compensation chain. The uniform design of the pressure distribution on the contact surface improves the stability of the chain body motion trajectory and meets the dynamic constraint requirements under high-precision continuous conveying conditions.

[0047] The pressing roller 2332 and the stabilizing roller 222 are both driven rollers, which are driven to rotate by the movement caused by the traction force of the compensation chain through the peripheral belt.

[0048] See also Figure 3 and Figure 4The chain measuring mechanism 3 includes a pushing cylinder 31, a motor slide 32 and a length measuring sensor 33, wherein the pushing cylinder 31 is fixed on the support frame 1 and is located between the two clamping devices 23, and the extension direction of the pushing cylinder 31 is the width direction of the support frame 1; the pushing cylinder 31 performs a full-stroke pushing action, so that a constant distance is maintained between the detection surface of the length measuring sensor 33 and the reference plane of the chain adaptive device. This geometric constraint relationship effectively ensures the stability of the measurement reference of the length measuring system during operation, and provides reliable mechanical positioning guarantee for the calibration of the measurement distance parameters of the length measuring sensor 33.

[0049] There are two motor slides 32, which are respectively a Z-axis motor slide 32 and an X-axis motor slide 32. Each motor slide 32 includes a fixed seat 321, a screw rod 322, a drive motor 323, and a slider 324. There are two fixed seats 321 on each motor slide 32, and the two fixed seats 321 are symmetrically arranged. The two fixed seats 321 are connected by a connecting plate 3211. The screw rod 322 is rotatably arranged on the two fixed seats 321. The drive motor 323 is arranged on the outside of one of the fixed seats 321 and is connected to the screw rod 322. The slider 324 is rotatably set on the screw rod 322, and a plurality of guide rods 3212 are set between the two fixed seats 321. The length direction of the guide rod 3212 is consistent with the sliding direction of the slider 324, and the guide rod 3212 is set through the slider 324. The screw rod 322 is driven to rotate by the driving motor 323, so that the slider 324 is slidably set along the length direction of the screw rod 322.

[0050] The fixing seat 321 on one side of the Z-axis motor slide 32 is fixedly connected to the piston rod of the ejection cylinder, and the slider 324 on the Z-axis motor slide 32 is fixedly connected to the connecting plate 3211 on the X-axis motor slide 32. The length measuring sensor 33 is fixedly mounted on the slider 324 of the X-axis motor slide 32.

[0051] In one embodiment, the chain measuring mechanism 3 further includes two pull rod encoders 34, one of which is located above one of the fixed plates 2321 and is used to collect dimensional data of the compensation chain in real time. The fixed section of the pull rod encoder 34 on this side is fixed above the fixed plate 2321, and its measuring section points downward and abuts against the top of the U-shaped connecting frame 2331. When the compensation chain completes the compression positioning, the axial dynamic displacement of the compression device 23 is collected by measuring the distance between the U-shaped connecting frame 2331 and the fixed plate 2321 and converted into a digital coding signal, which is transmitted to the main control microcontroller via the SPI bus; the microcontroller calculates the axial target positioning coordinates of the distance measuring sensor based on the real-time feedback data of the pull rod encoder 34, thereby realizing closed-loop correction of the measurement reference;

[0052] The other pull rod encoder 34 is fixed on the base 2121. The pull rod encoder 34 on this side is located on the side of the base 2121 away from the support frame 1. In one embodiment, the fixed section of the pull rod encoder 34 is fixed to the base 2121 of the fixed clamping part 212. Its measuring section points to the movably arranged clamping part 212 and abuts against the base 2121 on the movable clamping part 212. The measuring section measures the moving distance of the position of the base 2121 on the movable clamping part 212 to achieve measurement of the compensation chain. The measuring section is a displaceable detection guide rod. The displaceable detection guide rod and the transmission surface of the compensation chain form a dynamic compensation module; when the high-frequency replacement of the compensation chain causes the friction pair of the adaptive adjustment device 21 to produce progressive wear, the pull rod encoder 34 measures the real-time displacement and generates a feedback signal, which forms an electrical signal coupling with the main control microcontroller to achieve detection accuracy stability control throughout the life cycle. In this application, the deformation data of the compensation chain is collected in real time based on the two pull rod encoders 34, so that the two motor slides 32 perform millimeter-level linkage calibration, which can ensure that the length measuring sensor 33 reaches the target detection position, and after the detection is completed, the pushing cylinder 31 and the driving cylinder 2322 are reset synchronously to form an axial avoidance space, ensuring that a safety distance of 80mm is maintained between the length measuring sensor 33 and the compensation chain, thereby realizing rapid changeover and high-speed detection of the compensation chain.

[0053] The performance indicators and design requirements of some key components in this application are as follows:

[0054]

[0055] Control system block diagram and software flow chart as follows Figure 7 and Figure 8As shown, the single chip microcomputer reads the voltage value corresponding to the extension length of the pull rod encoder 34, and converts the voltage value into the actual displacement length of the pull encoder by mapping the voltage value with the actual distance in the program. The single chip microcomputer then combines the obtained measurement value with the preset position compensation amount. When positioning, the single chip microcomputer converts the total displacement after combining the measurement value with the preset compensation amount into the actual number of pulses, so that the motor slider 324 moves to the required position.

[0056] In addition, the length measurement sensor in this application is divided into filtering, feature extraction and peak detection, in which the filtering uses the Kalman filter algorithm ( Figure 9 ), the peak detection algorithm is as follows Figure 10 shown.

[0057] The link counting logic and length calculation method are as follows:

[0058] The structure of the compensation chain is as follows Figure 11 As shown, the total length can be directly calculated from the collective parameters of the chain link. The derivation process is as follows:

[0059] Assume that the total length of the compensation chain is , the length of a single compensation chain link is , the straight side diameter is , the pitch is ,in , the derivation formula is as follows:

[0060]

[0061]

[0062] In the above formula, N is the final output of the peak detection program, that is, the number of chain links identified.

[0063] The system calibration in this application is performed through the following steps:

[0064] Use the serial port screen to return the two-axis slide to the zero position, reselect the required chain model, and the system will drive the slide for positioning according to the chain parameters.

[0065] Working principle:

[0066] See also Figure 5 and Figure 6 During actual measurement, the compensation chain is passed through the two adaptive adjustment devices 21, and the moving end is pressed toward the fixed end.

[0067] Control the driving cylinders 2322 on both sides to descend, so that the chain pressing device 23 presses the compensation chain onto the chain stabilizing device 22 to ensure that the initial position of the compensation chain does not change;

[0068] The chain measuring mechanism 3 is pushed out by the push-out cylinder 31. The chain measuring mechanism 3 controls the motor slide 32 to move the measuring module to the measuring area according to the measurement data of the two pull-rod encoders 34. After the movement stops, the pull-rod encoder 34 is used to measure the vertical and horizontal distances to the replenishment chain to determine whether the length measuring sensor 33 is within the length measuring position range. If it is within the length measuring position range, the following steps are executed. If it is not within the length measuring position range, the Z-axis direction motor slide 32 is controlled to perform height correction until the length measuring sensor 33 reaches the length measuring position range.

[0069] After the length measuring sensor 33 enters the measuring position range, the compensating chain is moved by external force or traction of the traction machine. The length measuring sensor 33 enters the continuous measurement mode, uses the threshold to filter out useful signals, accumulates them to obtain the real-time number of sections of the compensating chain, and finally converts them into the length of the compensating chain according to the calculation formula. When the measured length reaches the set value, the length measuring system sends a stop signal to the control terminal to terminate the movement of the compensating chain. The compensating chain stops and waits for shearing. The length measuring system waits for the terminal signal to continue the next measurement.

[0070] During the length measurement process, the pull rod encoder 34 continuously measures the vertical height and horizontal distance with the compensation chain to determine whether the length measuring sensor 33 is within the measuring height and horizontal range, and controls the motor slide 32 to move and correct the length measuring sensor 33, thereby avoiding cutoff or saturation distortion of the sampling signal and improving the measurement accuracy.

[0071] After measuring one model, the push-out cylinder 31 and the drive cylinder 2322 retract to the appropriate position, and the staff can easily take out the compensation chain, shorten it or replace it without worrying about accidentally touching the length measurement sensor 33 during the replacement process.

[0072] The above contents are described below with reference to specific embodiments:

[0073] First, after entering the chain ring size and target measurement length of the compensation chain in the serial screen, the air circuit control module is used to control the double-cylinder compression device to press down. The ring-shaped conveyor belt connected below the cylinder compresses the compensation chain to ensure its stable operation. A linear displacement sensor is installed on the side parallel to the cylinder to measure the height of the cylinder's descent. At the same time, the distance between the guide wheel groups is adjusted to accommodate different specifications of the compensation chain to pass through normally and be guided correctly. Linear displacement sensors are also installed between the guide wheel groups to measure the distance between them. By reading the height of the cylinder's descent and the distance between the guide wheel groups, the system processes the data to obtain the distance the slide needs to move, and moves the eddy current displacement sensor to the accurate measurement position. The length measurement module, as the core functional module of the system, is responsible for real-time acquisition of the compensation chain ring profile feature signal using the eddy current displacement sensor, and for filtering and denoising and feature recognition processing of the original signal. Specifically, the Kalman filtering algorithm is used to dynamically suppress external interference noise and improve signal smoothness and stability by combining historical data and current measurement state. Subsequently, the peak detection algorithm based on sliding window proposed in this paper is used to accurately extract the number of wave peaks in the chain ring feature signal. The system calculates the actual length of the compensation chain according to the mapping formula. The air circuit control module is responsible for controlling the opening and closing of the relay to indirectly control the cylinder and the inkjet device. By driving the two-position three-way electromagnetic valve through the relay, the air circuit to the double cylinder is controlled. When the electromagnetic valve is powered on, compressed air enters the cylinder through the air circuit pipeline, drives the compression mechanism to press down, and realizes reliable compression of the running compensation chain. When the electromagnetic valve is powered off, the cylinder piston rod retracts, and the compression mechanism lifts up. In addition, the module is also connected to the inkjet device. When the embedded system detects that the measurement value reaches the set value, it controls the relay to be briefly attracted and then turned off to generate an edge signal. The timing device receives the signal and causes the inkjet device to spray a marker point on the surface of the compensation chain to mark the cutting position.

[0074] Process:

[0075] 1. Collect the original signal and filter Figure 12 );

[0076] 2. Perform peak detection to detect 309 rising trend segments, 308 peak points, and 308 falling trend segments, which are consistent with the actual results shown in the actual waveform graph Figure 3 );

[0077] 3. Specific measurement data

[0078]

[0079] The relative error of the measurement is within 5‰, and the relative error standard deviation indicates good repeatability.

[0080] The elevator compensating chain length measuring device provided in the present application, through the arrangement of a clamping device 23 and a stabilizing device 22, ensures that the measurement process will not be affected by the surface smoothness of the compensating chain, and reduces the vibration and friction to which the compensating chain is subjected during the length measurement process, thereby reducing the possibility of errors and further improving the measurement accuracy.

[0081] In this application, the two motor slides 32 are provided to form a pneumatic positioning execution module (push cylinder 31) and the X / Z axis high-precision motor slide 32 to form a driving mechanism. Through the linear drive output of the cylinder and the precision servo control of the two-axis slide, a multi-degree-of-freedom rapid reset mechanism is formed.

[0082] In this application, rod encoders 34 are arranged orthogonally in the X- and Z-axis directions. These encoders form a data path with a microcontroller unit (MCU) via an analog-to-digital converter (ADC) module, enabling real-time acquisition and quantification of linear displacement in the orthogonal axes. This configuration enables the length measurement device to simultaneously obtain millimeter-level position feedback signals in the X and Z planes, enabling dynamic compensation and correction of the length measurement sensor 33, effectively eliminating control deviations caused by mechanical backlash errors in the distance measurement system.

[0083] In addition, the provision of the pull rod encoder 34 enables automatic correction of the measuring distance during the measurement process, thereby improving the measurement accuracy and shortening the time for repeated positioning of the length measuring system.

Claims

1. An elevator compensating chain length measuring device, comprising a support frame and a length measuring sensor, characterized in that: Two groups of stabilizing devices that are symmetrical along the length direction of the support frame are arranged above the support frame, and each of the stabilizing devices includes two stabilizing rollers extending along the width direction of the support frame and a stabilizing belt mounted outside the stabilizing rollers. A clamping device is arranged above each of the stabilizing devices, and the clamping device includes a clamping roller corresponding to the stabilizing roller and a clamping belt mounted outside the clamping roller. A driving device is arranged above the clamping device to drive the clamping device to move in the vertical direction; a motor slide is provided on the support frame between the two groups of stabilizing devices for adjusting the Z-axis and X-axis directions of the length measuring sensor.

2. The elevator compensating chain length measuring device according to claim 1, characterized in that: The driving device includes a fixed plate and a driving cylinder located on the fixed plate. The fixed plate is fixed to the support frame. The cylinder barrel of the driving cylinder is fixed to the fixed plate and points downward. The end of the piston rod of the driving cylinder is connected to a U-shaped connecting frame. The opening of the U-shaped connecting frame points downward and extends along the length direction of the support frame. The two clamping rollers are located at both ends of the length direction of the U-shaped connecting frame and at the opening of the U-shaped connecting frame. The clamping rollers are rotatably set on the U-shaped connecting frame.

3. The elevator compensating chain length measuring device according to claim 1, characterized in that: The support frame is provided with an ejection cylinder, which is located between the two stabilizing devices. The ejection cylinder extends along the width direction of the support frame. The end of the ejection cylinder is connected to the motor slide for driving the length measuring sensor and adjusting the measuring position.

4. The elevator compensating chain length measuring device according to claim 3, characterized in that: There are two motor slides, which are a Z-axis motor slide and an X-axis motor slide respectively. Each motor slide includes two fixed seats and sliders. The two fixed blocks are connected by a connecting plate. The slider is slidably arranged along the length direction of the connecting plate. The fixed seat on one side of the Z-axis motor slide is connected and fixed to the piston rod of the ejection cylinder. The slider on the Z-axis motor slide is fixedly connected to the connecting plate on the X-axis motor slide. The length measuring sensor is fixedly arranged on the slider of the X-axis motor slide.

5. The elevator compensating chain length measuring device according to claim 4, characterized in that: The motor slide also includes a screw rod, a drive motor and a guide rod. The screw rod is rotatably set on the two fixed seats, and the drive motor is set on the outside of one of the fixed seats and connected to the screw rod; the slider is rotatably set on the screw rod, and the guide rod is located between the two fixed seats and parallel to the screw rod. The guide rod is set through the slider.

6. The elevator compensating chain length measuring device according to claim 1, characterized in that: It also includes two adaptive adjustment devices, which are respectively arranged on the side of the two stabilizing devices facing away from each other. The adaptive adjustment device includes a slide rail and two clamping parts. The slide rail is fixed on the support frame, and the slide rail extends along the width direction of the support frame. One of the clamping parts is fixed at one end of the slide rail in the track direction, and the other clamping part is slidably arranged along the track direction of the slide rail.

7. The elevator compensating chain length measuring device according to claim 6, characterized in that: The clamping part includes a base, a sliding part and a plurality of rubber wheels. The sliding part is slidably arranged above the slide rail. A limiting bolt is provided on the side of the sliding part, which passes through the sliding part and abuts against the slide rail. The position between the sliding part and the slide rail is limited by the limiting bolt. The base is a rectangular parallelepiped, and the length direction of the base is perpendicular to the direction of the slide rail. The rubber wheels are arranged in an array along the length direction of the base.

8. The elevator compensating chain length measuring device according to claim 7, characterized in that: It also includes two pull rod encoders, one of which is located above one of the driving devices and is used to collect the dimensional data of the compensation chain in real time; the other pull rod encoder is located on the base away from the fixed plate where the pull rod encoder is set, and the pull rod encoder on the base away from the fixed plate where the pull rod encoder is set is used to detect the distance between the two clamping parts.

9. The elevator compensating chain length measuring device according to claim 1, characterized in that: The stabilizing device also includes an L-shaped plate, and each of the stabilizing devices is provided with two L-shaped plates, the two L-shaped plates are located at both ends of the support frame in the width direction, the two L-shaped plates are symmetrically arranged, the horizontal sections of the two L-shaped plates are fixed on the top of the support frame, the two stabilizing rollers are located at both ends of the L-shaped plate in the length direction and between the two L-shaped plates, and the stabilizing rollers are rotatably arranged on the L-shaped plate.

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