Elevator pulley bearing anomaly detection method and device

Abstract

The invention provides an elevator pulley bearing anomaly detection method and device, and belongs to the technical field of elevators. According to whether the number of times that the collected noise is greater than a preset noise threshold value in a preset time period reaches a preset number of times, the continuity of the situation that the collected noise is greater than the preset noise threshold value in the preset time period and whether the situation that the noise is greater than the preset noise threshold value exists in a previous first preset time period, the noise is acquired; whether the pulley bearing is abnormal or not is judged, whether the pulley bearing is abnormal or not can be judged in real time, an alarm is given to elevator management personnel or maintenance personnel, and the safety of an elevator is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, and in particular relates to a method and a device for detecting abnormality of an elevator pulley bearing. Background Art

[0002] Elevator pulley bearings are key components in the elevator system. They not only support the elevator's traction machine, counterweight sheave, car sheave, pit compensation sheave, machine room guide sheave and other components to ensure the stable operation of these components, but also bear the weight of the elevator and passengers, as well as various forces and moments generated by the elevator during its up and down movement. Its operating status directly affects the stability and safety of the elevator.

[0003] At present, traditional elevator pulley bearing inspections generally use manual periodic inspections, which require inspectors to check and evaluate the health status of each bearing one by one, including appearance, lubrication, wear and other aspects, which takes a lot of time and energy and has low inspection efficiency. Due to the complexity of the elevator system and the increasing amount of elevator maintenance, it is difficult for inspectors to comprehensively and carefully inspect all bearings in a short period of time. In addition, manual inspections are easily affected by factors such as the inspector's experience, skill level, mood, fatigue, etc., and the accuracy of the inspection results is easily affected. Furthermore, manual periodic inspections are usually carried out at fixed time intervals, which may result in failures or wear between two inspections that cannot be discovered in time, thereby endangering the safety of the elevator and passengers. Summary of the invention

[0004] In response to the problems existing in the above-mentioned prior art, the present invention provides a method and device for detecting abnormality of an elevator pulley bearing, which determines whether there is an abnormality in the pulley bearing based on whether the number of times the collected noise is greater than a preset noise threshold within a preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period. It can determine whether there is an abnormality in the pulley bearing in real time and alarm the elevator management personnel or maintenance personnel to ensure the safety of the elevator.

[0005] In order to solve the above technical problems, the present invention provides an elevator pulley bearing abnormality detection method, comprising the following steps:

[0006] The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time;

[0007] Whether there is an abnormality in the pulley bearing is determined based on whether the number of times the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0008] Preferably, judging whether the pulley bearing is abnormal is based on whether the number of times the collected noise is greater than the preset noise threshold reaches a preset number, the continuity of the situation where the noise is greater than the preset noise threshold, and whether there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, which specifically includes the following steps:

[0009] If the collected noise does not exceed the preset noise threshold, it is determined that there is no abnormality in the pulley bearing;

[0010] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing is normal;

[0011] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is discontinuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing may be abnormal;

[0012] If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number of times, and the situation where the noise is greater than the preset noise threshold is continuous, it is determined that there is an abnormality in the pulley bearing.

[0013] Preferably, the preset noise threshold is 65-75dB.

[0014] Preferably, the preset noise threshold is 70dB.

[0015] Preferably, the preset number of times is 20%-30% of the total number of acquisitions within the preset time period.

[0016] Preferably, the preset number of times is 25% of the total number of collections within the preset time period.

[0017] Preferably, the preset time period is 40-80 minutes.

[0018] Preferably, the preset time period is 1 hour.

[0019] Preferably, the preset period is 4-6 minutes.

[0020] Preferably, the period is 5 minutes.

[0021] The present invention also provides an elevator pulley bearing abnormality detection device, using the above elevator pulley bearing abnormality detection method, comprising a noise detection device and a judgment module installed at the pulley bearing, the noise detection device and the judgment module are connected;

[0022] The noise detection device is used to collect noise data of the pulley bearing according to a preset period, store the data, and transmit the stored noise data to the judgment module;

[0023] The judgment module determines whether there is an abnormality in the pulley bearing based on whether the number of times the noise collected by the noise detection module is greater than the preset noise threshold within the preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0024] Preferably, the noise detection device includes a single-chip microcomputer main controller, a noise sensor, a wireless transceiver, a memory, and a power supply;

[0025] The single-chip main controller controls the operation of the elevator pulley bearing abnormality detection device, can send control commands to the noise sensor and the wireless transceiver, and can transmit data with the noise sensor, the wireless transceiver, and the memory;

[0026] The noise sensor is responsible for collecting noise data at the pulley bearing;

[0027] The memory is responsible for storing the collected noise data as needed;

[0028] The wireless transceiver is responsible for sending the noise data stored in the memory to the judgment module;

[0029] The power supply module is responsible for supplying power to the single-chip microcomputer main controller, the noise sensor, the wireless transceiver, and the memory.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] An elevator pulley bearing abnormality detection method and device of the present invention automatically monitors the noise level at the elevator pulley bearing, and determines in real time whether there is an abnormality in the pulley bearing according to whether the number of times the collected noise is greater than a preset noise threshold within a preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period, and an alarm is sent to the elevator management personnel or maintenance personnel to ensure the safety of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a connection diagram of the noise detection device according to an embodiment of the present invention.

[0033] Figure 2 It is a flow chart of an elevator pulley bearing abnormality detection method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention provides a method for detecting abnormality of an elevator pulley bearing, comprising the following steps:

[0039] The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time;

[0040] Whether there is an abnormality in the pulley bearing is determined based on whether the number of times the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0041] According to a specific embodiment of the present invention, whether there is an abnormality in the pulley bearing is determined based on whether the number of times the collected noise is greater than a preset noise threshold reaches a preset number, the continuity of the situation where the noise is greater than the preset noise threshold, and whether there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, and specifically includes the following steps:

[0042] If the collected noise does not exceed the preset noise threshold, it is determined that there is no abnormality in the pulley bearing;

[0043] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing is normal;

[0044] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is discontinuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing may be abnormal;

[0045] If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number of times, and the situation where the noise is greater than the preset noise threshold is continuous, it is determined that there is an abnormality in the pulley bearing.

[0046] According to a specific embodiment of the present invention, the preset noise threshold is 65-75dB.

[0047] According to a specific embodiment of the present invention, the preset noise threshold is 70 dB.

[0048] According to a specific embodiment of the present invention, the preset number of times is 20%-30% of the total number of collection times within the preset time period.

[0049] According to a specific embodiment of the present invention, the preset number of times is 25% of the total number of collections within the preset time period.

[0050] According to a specific embodiment of the present invention, the preset time period is 40-80 minutes.

[0051] According to a specific embodiment of the present invention, the preset time period is 1 hour.

[0052] According to a specific embodiment of the present invention, the preset period is 4-6 minutes.

[0053] According to a specific embodiment of the present invention, the period is 5 minutes.

[0054] The present invention also provides an elevator pulley bearing abnormality detection device, using the above elevator pulley bearing abnormality detection method, comprising a noise detection device and a judgment module installed at the pulley bearing, the noise detection device and the judgment module are connected;

[0055] The noise detection device is used to collect noise data of the pulley bearing according to a preset period, store the data, and transmit the stored noise data to the judgment module;

[0056] The judgment module determines whether there is an abnormality in the pulley bearing based on whether the number of times the noise collected by the noise detection module is greater than the preset noise threshold within the preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0057] According to a specific embodiment of the present invention, the noise detection device includes a single-chip microcomputer main controller, a noise sensor, a wireless transceiver, a memory, and a power supply;

[0058] The single-chip main controller controls the operation of the elevator pulley bearing abnormality detection device, can send control commands to the noise sensor and the wireless transceiver, and can transmit data with the noise sensor, the wireless transceiver, and the memory;

[0059] The noise sensor is responsible for collecting noise data at the pulley bearing;

[0060] The memory is responsible for storing the collected noise data as needed;

[0061] The wireless transceiver is responsible for sending the noise data stored in the memory to the judgment module;

[0062] The power supply module is responsible for supplying power to the single-chip microcomputer main controller, the noise sensor, the wireless transceiver, and the memory.

[0063] Example 1

[0064] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection method of the present invention is described in detail below.

[0065] The present invention provides a method for detecting abnormality of an elevator pulley bearing, comprising the following steps:

[0066] The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time;

[0067] Whether there is an abnormality in the pulley bearing is determined based on whether the number of times the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0068] Example 2

[0069] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection method of the present invention is described in detail below.

[0070] The present invention provides a method for detecting abnormality of an elevator pulley bearing, comprising the following steps:

[0071] The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time;

[0072] According to whether the number of times that the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation that the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation that the noise is greater than the preset noise threshold within the previous first preset time period, it is determined whether there is an abnormality in the pulley bearing, specifically including the following steps:

[0073] If the collected noise does not exceed the preset noise threshold, it is determined that there is no abnormality in the pulley bearing;

[0074] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing is normal;

[0075] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is discontinuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing may be abnormal;

[0076] If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number of times, and the situation where the noise is greater than the preset noise threshold is continuous, it is determined that there is an abnormality in the pulley bearing.

[0077] Among them, the preset noise threshold is 65-75dB.

[0078] The preset number of times is 20%-30% of the total number of collections within the preset time period.

[0079] Wherein, the preset time period is 40-80 minutes.

[0080] Wherein, the preset period is 4-6 minutes.

[0081] Example 3

[0082] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection method of the present invention is described in detail below.

[0083] The present invention provides a method for detecting abnormality of an elevator pulley bearing, comprising the following steps:

[0084] The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time;

[0085] According to whether the number of times that the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation that the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation that the noise is greater than the preset noise threshold within the previous first preset time period, it is determined whether there is an abnormality in the pulley bearing, specifically including the following steps:

[0086] If the collected noise does not exceed the preset noise threshold, it is determined that there is no abnormality in the pulley bearing;

[0087] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing is normal;

[0088] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is discontinuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing may be abnormal;

[0089] If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number of times, and the situation where the noise is greater than the preset noise threshold is continuous, it is determined that there is an abnormality in the pulley bearing.

[0090] Among them, the preset noise threshold is 70dB.

[0091] The preset number of times is 25% of the total number of collections within the preset time period.

[0092] Wherein, the preset time period is 1 hour.

[0093] Wherein, the period is 5 minutes.

[0094] Example 4

[0095] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection device of the present invention is described in detail below.

[0096] The present invention provides an elevator pulley bearing abnormality detection device, using the above elevator pulley bearing abnormality detection method, comprising a noise detection device and a judgment module installed at the pulley bearing, wherein the noise detection device and the judgment module are connected;

[0097] The noise detection device is used to collect noise data of the pulley bearing according to a preset period, store the data, and transmit the stored noise data to the judgment module;

[0098] The judgment module determines whether there is an abnormality in the pulley bearing based on whether the number of times the noise collected by the noise detection module is greater than the preset noise threshold within the preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0099] Example 5

[0100] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection device of the present invention is described in detail below.

[0101] The present invention provides an elevator pulley bearing abnormality detection device, using the above elevator pulley bearing abnormality detection method, comprising a noise detection device and a judgment module installed at the pulley bearing, wherein the noise detection device and the judgment module are connected;

[0102] The noise detection device is used to collect noise data of the pulley bearing according to a preset period, store the data, and transmit the stored noise data to the judgment module;

[0103] The judgment module determines whether there is an abnormality in the pulley bearing based on whether the number of times the noise collected by the noise detection module is greater than the preset noise threshold within the preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

[0104] Wherein, the noise detection device includes a single-chip microcomputer main controller, a noise sensor, a wireless transceiver, a memory, and a power supply;

[0105] The single-chip main controller controls the operation of the elevator pulley bearing abnormality detection device, can send control commands to the noise sensor and the wireless transceiver, and can transmit data with the noise sensor, the wireless transceiver, and the memory;

[0106] The noise sensor is responsible for collecting noise data at the pulley bearing;

[0107] The memory is responsible for storing the collected noise data as needed;

[0108] The wireless transceiver is responsible for sending the noise data stored in the memory to the judgment module;

[0109] The power supply module is responsible for supplying power to the single-chip microcomputer main controller, the noise sensor, the wireless transceiver, and the memory.

[0110] Example 6

[0111] According to a specific embodiment of the present invention, the elevator pulley bearing abnormality detection device of the present invention is described in detail below.

[0112] The present invention provides an elevator pulley bearing abnormality detection device, comprising a noise detection device and a judgment module installed at the pulley bearing, wherein the noise detection device is connected to the judgment module;

[0113] The noise detection device includes a single-chip microcomputer main controller, a noise sensor, a wireless transceiver, a memory, and a power supply;

[0114] The single-chip main controller controls the operation of the elevator pulley bearing abnormality detection device, can send control commands to the noise sensor and the wireless transceiver, and can transmit data with the noise sensor, the wireless transceiver, and the memory;

[0115] The noise sensor is responsible for collecting noise data at the pulley bearing;

[0116] The memory is responsible for storing the collected noise data as needed;

[0117] The wireless transceiver is responsible for sending the noise data stored in the memory to the judgment module;

[0118] The power module is responsible for supplying power to the single-chip microcomputer main controller, the noise sensor, the wireless transceiver, and the memory, and can be in the form of a button battery, thereby eliminating the need for wired cables for power supply;

[0119] The method for the noise sensor to collect noise is specifically to collect it once every 5 minutes, and store the collected decibel value in the memory. After being stored 12 times (i.e. 1 hour), it is sent to the judgment module through the wireless transceiver at one time. The function of the judgment module can be set to be implemented by the elevator master controller; if the immediate sending fails due to reasons such as unstable signal, it will be repeated to the judgment module every 3 minutes until it succeeds. If it fails to succeed after 10 times of sending, an error prompt will be prompted.

[0120] The storage format of noise data is x d,t , which means the decibel value x collected for the tth time on the dth day.

[0121] For example: If x 1,1 =50dB, it means that the noise level collected at the first time on the first day (i.e., the 0th minute of the first day) is 50 decibels; if x 1,2 =55dB, it means that the noise level collected for the second time on the first day (i.e. the 5th minute on the first day) is 55 decibels.

[0122] The data sent to the elevator master controller via the wireless transceiver for the first time on the first day is x 1,1 , x 1,2 , ..., x 1,12 ; The data sent to the elevator master controller via the wireless transceiver for the second time on the first day is x 1,13 , x 1,14 , ..., x 1,24 , and so on. Considering that there is an upper limit on the memory size of the noise detection device installed at the pulley bearing, the past data can be deleted regularly (such as once a week) to ensure sufficient space to store new data.

[0123] The judgment module makes the following judgments based on the received noise data:

[0124] If the collected noise does not exceed the preset noise threshold (set to 70dB in this embodiment), it is determined that there is no abnormality in the pulley bearing and monitoring continues;

[0125] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number (3 times in this embodiment), the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period (1 hour in this embodiment) (the noise monitored in this period may be caused by environmental noise), then it is determined that there is no abnormality in the pulley bearing and monitoring continues;

[0126] If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is not continuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is judged that there may be an abnormality in the pulley bearing, and the elevator will not be stopped, but the maintenance personnel will be notified to go to the site for inspection;

[0127] If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is continuous, it is judged that there is an abnormality in the pulley bearing, an alarm is sounded, the elevator is stopped when there are no passengers in the car, and maintenance personnel are notified to go to the site for inspection immediately.

[0128] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for detecting abnormality of an elevator pulley bearing, characterized in that: The steps include: The noise of the pulley bearing is collected according to a preset period and stored in the order of the collection time; Whether there is an abnormality in the pulley bearing is determined based on whether the number of times the collected noise is greater than the preset noise threshold within the preset time period reaches the preset number of times, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

2. The elevator pulley bearing abnormality detection method according to claim 1, characterized in that: According to whether the number of times the collected noise is greater than the preset noise threshold reaches the preset number, the continuity of the situation where the noise is greater than the preset noise threshold, and whether there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined whether the pulley bearing is abnormal, specifically including the following steps: If the collected noise does not exceed the preset noise threshold, it is determined that there is no abnormality in the pulley bearing; If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, the situation where the noise is greater than the preset noise threshold is discontinuous, and there is no situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing is normal; If the number of times the collected noise is greater than the preset noise threshold is less than or equal to the preset number, and the situation where the noise is greater than the preset noise threshold is discontinuous, but there is a situation where the noise is greater than the preset noise threshold in the previous preset time period, it is determined that the pulley bearing may be abnormal; If the number of times the collected noise is greater than the preset noise threshold is greater than or equal to the preset number of times, and the situation where the noise is greater than the preset noise threshold is continuous, it is determined that there is an abnormality in the pulley bearing.

3. The elevator pulley bearing abnormality detection method according to claim 1, characterized in that: The preset noise threshold is 65-75dB.

4. The elevator pulley bearing abnormality detection method according to claim 3, characterized in that: The preset noise threshold is 70dB.

5. The elevator pulley bearing abnormality detection method according to claim 1, characterized in that: The preset number of times is 20%-30% of the total number of acquisitions within the preset time period.

6. The elevator pulley bearing abnormality detection method according to claim 5, characterized in that: The preset number of times is 25% of the total number of collections within the preset time period.

7. The elevator pulley bearing abnormality detection method according to claim 1, characterized in that: The preset time period is 40-80 minutes.

8. The elevator pulley bearing abnormality detection method according to claim 7, characterized in that: The preset time period is 1 hour.

9. The elevator pulley bearing abnormality detection method according to claim 7, characterized in that: The preset period is 4-6 minutes.

10. The elevator pulley bearing abnormality detection method according to claim 9, characterized in that: The period is 5 minutes.

11. An elevator pulley bearing abnormality detection device, characterized in that: The elevator pulley bearing abnormality detection method according to any one of claims 1 to 10 comprises a noise detection device and a judgment module installed at the pulley bearing, wherein the noise detection device is connected to the judgment module; The noise detection device is used to collect noise data of the pulley bearing according to a preset period, store the data, and transmit the stored noise data to the judgment module; The judgment module determines whether there is an abnormality in the pulley bearing based on whether the number of times the noise collected by the noise detection module is greater than the preset noise threshold within the preset time period reaches a preset number, the continuity of the situation where the collected noise is greater than the preset noise threshold within the preset time period, and whether there is a situation where the noise is greater than the preset noise threshold in the previous first preset time period.

12. The elevator pulley bearing abnormality detection device according to claim 11, characterized in that: The noise detection device includes a single-chip microcomputer main controller, a noise sensor, a wireless transceiver, a memory, and a power supply; The single-chip main controller controls the operation of the elevator pulley bearing abnormality detection device, can send control commands to the noise sensor and the wireless transceiver, and can transmit data with the noise sensor, the wireless transceiver, and the memory; The noise sensor is responsible for collecting noise data at the pulley bearing; The memory is responsible for storing the collected noise data as needed; The wireless transceiver is responsible for sending the noise data stored in the memory to the judgment module; The power supply module is responsible for supplying power to the single-chip microcomputer main controller, the noise sensor, the wireless transceiver, and the memory.

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