Quantitative detection system for elevator leveling accuracy

Abstract

The invention belongs to the technical field of elevator detection equipment, and particularly relates to a leveling accuracy quantitative detection method and device for a traction type elevator, and the device comprises two sets of detection devices which are installed near an elevator landing door and a hoistway and are composed of direct current motors, angular displacement sensors and a rotating pair contact rod, wherein an output shaft of the direct-current motor and an elevator leveling plane or a lift car height plane at the standard leveling height are located on the same horizontal plane, and the elevator lift car running to any floor makes contact with the contact rod, so that the contact rod rotates around the output shaft of the motor; and the height difference information between the current lift car and the flat layer can be calculated according to the angle information received by the angular displacement sensor and the distance from the contact point to the motor driving shaft. On-line monitoring of the leveling height difference in the elevator running process can be achieved, and when the leveling height difference exceeds the standard range, the alarm can give out alarm information in real time and prompt that the elevator should be overhauled. The device can quantitatively monitor the deviation value between the elevator car and the leveling layer in real time, and has the advantages of being high in precision, low in cost, high in intelligent degree and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator detection equipment, and in particular relates to a quantitative detection system for elevator leveling accuracy. Background Art

[0002] Elevator car leveling accuracy is a key performance metric. It refers to the vertical alignment accuracy between the elevator car sill and the landing door sill. According to GB / T 7588.1-2020, "Safety Code for Elevator Manufacturing and Installation," passenger elevator leveling must be controlled within ±15mm. Special applications, such as hospital elevators and high-rise elevators, require even higher leveling accuracy (within ±5mm).

[0003] From a safety perspective, if the height difference between the elevator car and the floor exceeds ±20mm, the risk of passengers falling due to missed steps increases by more than three times. From an efficiency perspective, for every ±10mm increase in floor deviation in a freight elevator, loading and unloading time increases by 15%. Furthermore, long-term floor height deviation can lead to increased wear on the floor door sills and failure of the car door locks to engage, potentially causing safety issues such as emergency stops and floor door-to-car door closure failures. According to industry statistics, floor-related failures account for 23% of all elevator failures, increasing the average annual maintenance cost of a single elevator by approximately 8,000 yuan. Therefore, timely correction of the height difference between the elevator floor door and car door sills is crucial.

[0004] The traditional method of leveling accuracy detection is manual measurement, such as using a steel ruler or relying on maintenance and repair experience for visual measurement. This method often takes a long time (>30 minutes) to detect a single elevator, and has problems such as low detection efficiency and low intelligence.

[0005] Application publication number CN101597001B describes a device for detecting elevator leveling positions. This device uses a detection head containing a linear Hall effect sensor fixed to the top of the car. The device determines whether the elevator car is within the leveling range by detecting the magnetic signal from a magnetic positioning plate fixed near the middle door of the hoistway. This method can achieve high-precision level height difference detection to a certain extent without the need for manual supervision, but it has high installation requirements for the detection head and requires sensor calibration. Furthermore, the detection head installed on the elevator car can shift or become loose due to vibration during elevator operation, which can affect detection accuracy.

[0006] Therefore, how to achieve high stability, high precision, and real-time quantitative monitoring of elevator floor height difference information without being disturbed by vibration during car operation and provide timely feedback is an urgent problem that needs to be solved at this stage. Summary of the Invention

[0007] The purpose of the present invention is to provide a quantitative detection system for elevator leveling accuracy to solve the problems in the prior art of low elevator leveling height detection accuracy, long time consumption, insufficient intelligence and susceptibility to interference from elevator operation vibration, and to achieve high-precision, real-time and automated elevator leveling height difference monitoring.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] An elevator leveling height difference detection system includes a mounting support, a detection contact rod, a stepping motor, an angular displacement sensor, a processing unit and an alarm device;

[0010] The mounting support is fixedly installed near the door frame of the middle door of the elevator shaft. Its structure is a rectangular frame, which is used to firmly support the stepper motor, angular displacement sensor and detection contact rod; the output shaft of the stepper motor is connected to the detection contact rod, and the angular displacement sensor is installed near the stepper motor for real-time monitoring of the rotation angle of the detection contact rod.

[0011] Initially, the detection contact rod is parallel to the hoistway wall and does not affect the normal operation of the elevator car. When the elevator car reaches the floor to be detected, the processing unit sends a command to the stepper motor, which drives the detection contact rod to rotate to a position with a certain angle relative to the plane of the landing door sill, entering the detection state.

[0012] When the car reaches the floor to be tested and stops, the top or bottom of the car contacts the detection contact rod, pushing it to rotate further. The angular displacement sensor collects the rotation angle information of the detection contact rod in real time and transmits the data to the processing unit.

[0013] The processing unit pre-calibrates the distance h between the detection contact rod and the contact point of the car, and calculates the real-time rotation angle θ based on the trigonometric function relationship, thereby quickly and accurately obtaining the height difference between the current car and the standard leveling position.

[0014] The alarm device is fixedly installed near the door frame of the elevator shaft wall. The processing unit determines in real time whether the elevator level height difference is within the set standard range (±15mm). If it exceeds the allowable range, the processing unit immediately drives the alarm device to sound an alarm and notify on-site maintenance personnel to carry out timely maintenance.

[0015] To further optimize the solution, the horizontal position of the detection contact rod in the present invention should be flush with the top and bottom positions of the elevator car in the standard leveling state to ensure that the contact rod can stably contact the top or bottom surface of the car during the detection process, thereby ensuring the reliability and accuracy of the detection results.

[0016] To further optimize the solution, the stepper motor, detection contact rod and angular displacement sensor are respectively set up one set above and one set below the shaft door frame on each floor to cope with the different upward and downward running directions of the elevator, thereby achieving comprehensive coverage of level height difference detection.

[0017] The present invention provides a method for detecting the height difference between elevator floors, comprising the following steps:

[0018] S11 When the elevator car runs to the vicinity of the floor to be detected, the processing unit sends a signal and the detection system enters the detection preparation state from the reset state;

[0019] After receiving the command, the S12 stepper motor drives the detection contact rod to rotate to the detection state where it forms a certain angle with the floor door sill plane;

[0020] S13 After the elevator car runs and stops, the top or bottom surface of the car pushes the detection contact rod to rotate, and the angular displacement sensor measures and transmits the rotation angle θ data in real time;

[0021] The processing unit S14 calculates the difference between the real-time elevator car and the standard leveling height using trigonometric functions based on the calibrated distance h and the real-time measured rotation angle θ;

[0022] The S15 processing unit compares the calculated height difference with the set standard range and determines in real time whether the current leveling height difference is within the allowable range;

[0023] If the height difference detected by S16 exceeds the allowable range, the alarm device will be immediately activated and send out an alarm signal to prompt on-site maintenance personnel to perform elevator maintenance.

[0024] Preferably, S12 and S13 include driving the rotating shaft to rotate by the contact rod in the leveling height difference detection device, transmitting the angle information θ detected by the angular displacement sensor to the processing unit, and based on the calibrated contact distance l, the elevator leveling height difference data information can be quickly calculated through a simple trigonometric function relationship sinθ = opposite side / hypotenuse, and the processing unit determines whether the height difference is within the standard range.

[0025] Preferably, S14 and S15 include filtering, denoising, and linear correction processing of the raw angle signal transmitted by the angular displacement sensor by the processing unit to eliminate angle drift errors caused by equipment micro-vibration, signal delay, or mechanical assembly errors. The processing unit first filters multiple sets of continuous angle data based on the weighted sliding average method, and then performs linear regression correction in combination with the calibration model to improve the stability and accuracy of the angle measurement. Finally, the corrected angle value θ is substituted into the preset trigonometric function calculation model to obtain a more accurate elevator car leveling height difference h value, and this height difference is compared with the set standard range to determine whether it meets the safe leveling requirements.

[0026] Preferably, the S16 includes the elevator car running and stopping at any floor, and the leveling height difference detection device detects whether the current elevator car sill height and the leveling height difference meet the standard value. When it is detected that the leveling height difference does not meet the standard, the alarm is sounded to prompt the maintenance personnel that the current elevator needs to adjust the elevator car leveling position.

[0027] This invention, through precise stepper motor drive control and real-time, high-precision angular displacement sensor measurement, ensures accurate and real-time elevator floor height difference detection, significantly improving safety and reliability during elevator operation. Furthermore, the system's high degree of automation reduces manual maintenance costs and safety risks, resulting in significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0029] Figure 1 The figure is a schematic diagram of the installation of an elevator level height difference detection system of the present invention.

[0030] Figure 2 The figure is an overall schematic diagram of an elevator level height difference detection device according to the present invention.

[0031] Figure 3 The present invention is a schematic diagram illustrating the calculation of the leveling height difference of an elevator leveling height difference detection method.

[0032] Figure 4 It is a flow chart of the working principle of the present invention. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Based on the aforementioned implementation manner, the elevator leveling height difference detection system and method provided by the present invention are now further described in detail with regard to specific implementation manners.

[0036] like Figures 1 to 4 As shown, an elevator floor height difference detection system provided by this embodiment includes a mounting support 10, a detection contact rod 9, a stepping motor 8, an angular displacement sensor 11, a processing unit and an alarm device 1.

[0037] Specifically, the mounting bracket 10 is made of high-strength stainless steel and is securely fixed to the doorframe of each floor door in the elevator shaft using expansion bolts. The mounting bracket 10 has a rectangular frame structure, ensuring a stable and reliable structure that effectively supports and secures the stepper motor 8, detection contact rod 9, and angular displacement sensor 11. The installation position of the mounting bracket 10 is precisely calibrated on-site to ensure that the detection contact rod 9 accurately contacts the top or bottom of the car when in the standard leveling position.

[0038] The detection contact rod 9 is made of high-strength aluminum alloy, offering lightweight and high rigidity, effectively reducing measurement errors caused by material deformation. The length of the detection contact rod 9 is precisely determined through on-site calibration, ensuring that the contact position between its endpoint and the elevator car remains within a highly accurate range. The stepper motor 8 utilizes a high-precision micro-stepping motor equipped with a high-resolution rotary encoder to achieve precise control and real-time feedback of the detection contact rod's position, ensuring system reliability.

[0039] When the elevator car 4 approaches the floor to be detected, the processing unit sends a control instruction to the stepper motor 8 based on the signal provided by the floor position sensor, so that the detection contact rod 9 rotates to the detection state at an angle of 40 degrees to the floor door sill plane, so as to ensure that the car 4 is subjected to moderate force when contacting the detection rod, thereby avoiding damage to the car or the detection device.

[0040] When the elevator car 4 continues to run to the floor and stops completely, the top or bottom of the car contacts the detection contact rod 9 and pushes the detection contact rod 9 to rotate further. The angular displacement sensor 11 captures the rotation angle θ of the detection contact rod 9 in real time and transmits the collected original angle data to the processing unit.

[0041] After receiving the original angle signal sent back by the angular displacement sensor 11, the processing unit immediately performs data filtering, denoising and linear correction processing. The specific steps are as follows:

[0042] S21 uses weighted sliding average filtering to perform preliminary filtering on continuous angle data, effectively eliminating abnormal fluctuations caused by instantaneous interference and ensuring the stability of angle data;

[0043] The S22 further uses the Kalman filter algorithm for dynamic filtering to effectively suppress data fluctuations caused by stepper motor micro-vibration, elevator operation vibration, and mechanical assembly errors, thereby improving data reliability.

[0044] S23 performs linear regression analysis and secondary correction on the filtered angle data to further eliminate systematic errors and improve data measurement accuracy;

[0045] S24 substitutes the corrected angle data θ into a preset trigonometric function calculation formula, and accurately calculates the real-time height difference h between the elevator car and the standard leveling position using the formula sinθ = opposite side / hypotenuse.

[0046] To further optimize the solution, the stepper motor 8 and the detection contact rod 9 in this embodiment are installed one set above and one set below the hoistway door frame on each floor to fully cover the detection needs of the elevator going up and down, and achieve higher detection accuracy and comprehensiveness.

[0047] In practical applications, the operation process of the elevator leveling accuracy quantitative detection system according to the embodiment of the present invention specifically includes the following steps:

[0048] S11 When the elevator car 4 runs to the vicinity of the floor to be detected, the processing unit sends a drive instruction to the stepper motor 8 according to the real-time position signal, so that the detection contact rod 9 rotates to the detection preparation state, forming an angle of 40 degrees with the floor door sill plane;

[0049] S12 After the elevator car 4 runs to the floor and comes to a complete stop, the top or bottom of the car comes into contact with the detection contact rod 9, pushing the detection contact rod 9 to rotate;

[0050] S13: The angular displacement sensor 11 collects the angle data θ of the rotation of the contact rod 9 in real time and transmits the data to the processing unit;

[0051] The S14 processing unit immediately performs filtering and correction processing after receiving the real-time angle data to ensure measurement accuracy;

[0052] The S15 processing unit uses the corrected angle data to calculate the real-time height difference h through trigonometric functions;

[0053] The S16 processing unit determines in real time whether the calculated height difference h is within the set safety standard range (±15mm);

[0054] If the detected height difference exceeds the allowable range, the processing unit immediately activates the alarm device 1, which alerts the on-site maintenance personnel through a voice alarm and a flashing LED warning light, and transmits the alarm information to the control center and the mobile terminals of the relevant maintenance personnel in real time through the wireless communication module, ensuring a fast and effective fault response.

[0055] S18 If there is no on-site response or the fault is not handled within a certain period of time after the alarm device 1 issues an alarm, the processing unit automatically sends a secondary alarm message until it is confirmed and handled by the maintenance personnel;

[0056] After the S19 maintenance personnel complete the on-site inspection and maintenance, they confirm the completion of the maintenance through the system's built-in terminal or handheld device. The system automatically records the maintenance log and updates the equipment's operating status.

[0057] To further optimize the solution and enhance the intelligence and stability of system operation, the processing unit in this embodiment also features a fault self-diagnosis function. If a fault is detected in the stepper motor or angular displacement sensor, the processing unit automatically switches to a backup detection mode and sends a real-time alarm to the control center. The control center can remotely analyze and diagnose the fault type, guiding on-site maintenance personnel to quickly complete repair or replacement operations.

[0058] The present invention realizes high-precision real-time detection and automatic alarm function of elevator level height difference through the collaboration of precise mechanical structure design and advanced data processing algorithm, which can significantly improve the safety of elevator operation and reduce manual maintenance costs. It has broad practical application prospects and significant social and economic benefits.

Claims

1. A quantitative detection system for elevator leveling accuracy, characterized by: It includes a detection contact rod 9, a stepping motor 8, an angular displacement sensor 11, a mounting support 10, and an alarm device 1.

2. The elevator leveling accuracy quantitative detection system according to claim 1, characterized in that: The mounting support 10 is installed and fixed near the middle door frame 3 of the elevator shaft 7 and is used to install the stepping motor 8, the angular displacement sensor 11 and the contact rod 9.

3. The elevator leveling accuracy quantitative detection system according to claim 1, characterized in that: The mounting support 10 is a rectangular frame structure, and is used to assemble the stepping motor 7 , the angular displacement sensor 11 and the contact rod 9 .

4. The elevator leveling accuracy quantitative detection system according to claim 1, characterized in that: The mounting supports 10 are respectively fixed and installed one above and one below near the door frame of each floor in the elevator shaft, and the contact rod 9 assembled on the mounting supports 10 is horizontally positioned flush with the top and bottom surfaces of the elevator car 4 at the standard level height.

5. The elevator leveling accuracy quantitative detection system according to claim 1, characterized in that: The stepper motor 8, angular displacement sensor 11 and contact rod 9 are mounted on the mounting support 10 to form a set of detection mechanisms 2 and 6 respectively. When the elevator car 4 has not reached the floor to be tested, the stepper motor 8 in the detection mechanism 2 and 6 drives the contact rod 9 to rotate to a state parallel to the shaft wall 7, which is considered to be the reset state. When the elevator is going up, when the door of the previous floor is correctly closed and an upward signal is sent, the stepper motor 8 (2) in the detection mechanism 2 drives the contact rod 9 (2) to rotate to a position with a 40-degree angle with the floor door sill plane, which is considered to be the detection state. When the elevator car 4 runs to the floor, the top surface of the car contacts the contact rod 9, pushing the contact rod 9 to rotate. By capturing the angle information of the angular displacement sensor 11 when the car 4 is stopped and calculating the contact length of the calibrated contact rod, the current height deviation value of the elevator car and the level floor can be obtained. When the elevator is going down, the detection mechanism 6 is activated for detection.

6. The elevator leveling accuracy quantitative detection system according to claim 1, characterized in that: The alarm device 1 is fixed near the door frame 3 of the 7th floor door on the elevator shaft wall. When the detection mechanisms 2 and 6 detect that the elevator level height difference exceeds the standard range, the alarm device sends an alarm signal to remind the elevator to be repaired.

7. According to claim 5, the current height deviation between the elevator car and the floor level can be calculated by capturing the angle information of the angular displacement sensor 11 when the car 4 is stopped and calculating the contact length of the calibrated contact rod, characterized in that: When the detection device is installed, the contact point between the car top and the detection contact rod 9 can be calibrated to obtain the calibration distance h. By obtaining the angle information θ of the angular displacement sensor during detection, the leveling height difference h can be calculated through trigonometric functions.

8. A quantitative detection system for elevator leveling accuracy, based on the elevator leveling height difference detection system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S11 elevator car is ready to depart to any door position on the floor; S12 The leveling height difference detection device enters the detection state from the reset state; S13 The elevator car pushes the detection rod to rotate, and the processing system obtains the angle information of the angular displacement sensor; S14 calculates the leveling height difference h based on the calibrated distance h and angle θ through trigonometric function; S15 compares the standard leveling height difference range to determine whether the current leveling height difference meets the standard, and issues an alarm if it does not meet the standard.

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