Elevator brake and early warning method thereof
By introducing sound acquisition and analysis technology into the elevator brake, the acoustic parameters of the brake arm can be monitored in real time, solving the problem of the inability to provide timely early warning and location of faults in the existing technology, and realizing early fault warning and accurate monitoring of the elevator brake.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-06
- Publication Date
- 2026-04-03
AI Technical Summary
Existing elevator brake monitoring methods cannot promptly detect subtle differences in brake operation during braking or lifting, resulting in the inability to provide early warnings of potential faults, and the audible warning function cannot pinpoint the location of the fault.
Using a sound acquisition and control device, the sound is collected during the movement of the brake arm, and the sound wave parameters are analyzed to determine whether the drive device is abnormal, including the working status of the spring and electromagnet, and to provide early warning of potential faults.
It enables early warning of elevator brake malfunctions, avoids dangers caused by malfunctions, and improves the accuracy and reliability of monitoring.
Smart Images
Figure CN121778622A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of elevator brake technology, and in particular to an elevator brake and its early warning method. Background Technology
[0002] The elevator traction mechanism brake is not only a crucial component of the elevator, but it is also frequently used as an overspeed protection device for the elevator's upward movement and as a protection device against unexpected car movement. Failure of its braking force can pose a significant danger, making monitoring of its operational status essential.
[0003] Traditional brake monitoring relies on microswitches, which are triggered when the brake is applied or released to verify the action. This method monitors the result of the action and can only detect whether the brake is effective or ineffective. It cannot detect subtle differences such as reduced braking effect when the brake is applied or released, and the microswitch may not detect a brake malfunction until after a safety accident has occurred.
[0004] Some existing brake monitoring systems also have audible warning functions, but these functions can only determine whether there is a difference between the sound emitted during the brake's operation and the sound emitted during normal operation, thus determining whether the brake is faulty, but they cannot determine the specific location of the brake's fault. Summary of the Invention
[0005] The main objective of this invention is to provide an elevator brake and its early warning method, which aims to provide an early warning before the elevator brake malfunctions and causes a dangerous accident.
[0006] To achieve the above objectives, the present invention proposes an elevator brake for braking the brake wheel of an elevator, the elevator brake comprising: The outer casing is used to mount the elevator's drive unit; A brake arm is disposed inside the housing and a brake liner is provided thereon. The brake arm is movably disposed such that it has a first position that separates the brake liner from the brake wheel and a second position that makes the brake liner and the brake wheel fit together in its movement path. A drive unit for driving the movement of the brake arm; A sound acquisition device, disposed within the housing, is used to acquire the sound emitted during the movement of the brake arm; and, A control device, electrically connected to the sound acquisition device, is used to determine whether the drive device is malfunctioning based on the sound acquired by the sound acquisition device; When the drive device malfunctions, the sound emitted by the brake arm during its movement differs from the sound emitted during normal operation.
[0007] In one embodiment, the driving device includes a spring and a driving unit; One end of the brake arm is hinged to the housing, the brake liner is provided in the middle of the brake arm, and the other end of the brake arm is connected to the housing through the spring so that the brake arm is located in the second position under the action of the rebound force. The driving part is provided at the other end of the brake arm to drive the brake arm to overcome the spring force and be located in the first position. When the brake arm moves from the first position to the second position under the action of the rebound force, the sound acquisition device is used to collect the sound of the collision between the brake pad and the brake wheel; When the drive unit drives the brake arm to move from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the drive unit and the brake arm.
[0008] In one embodiment, the driving unit includes an electromagnet electrically connected to the control device. The electromagnet is provided with a moving iron core, which is movably disposed so as to be able to collide and abut against the brake arm on its movement path. The moving iron core has a lifting position for driving the brake arm from the second position to the first position and a braking position for separating from the brake arm. When the electromagnet drives the brake arm to move from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the moving iron core and the brake arm.
[0009] In one embodiment, two brake arms are provided, which are respectively disposed on both sides of the brake wheel; When the elevator is running, both brake arms are in the first position; when the elevator brakes, both brake arms are in the second position.
[0010] In one embodiment, the sound acquisition device includes a microphone, which is spaced apart from the brake wheel and is positioned directly opposite the center of the brake wheel.
[0011] The present invention also proposes a warning method for an elevator brake as described in any one of the above-mentioned methods, the warning method for the elevator brake comprising the following steps: The target sound wave parameters collected by the sound acquisition device are obtained, and the component emitting the sound is identified based on the target sound wave parameters; The target acoustic parameters are compared with preset values to determine whether the driving device is malfunctioning.
[0012] In one embodiment, the elevator brake further includes a spring and an electromagnet, the electromagnet having a moving iron core. The step of acquiring the target sound wave parameters collected by the sound acquisition device and identifying the component emitting the sound based on the target sound wave parameters includes: During the rotation of the brake wheel and the movement of the brake arm toward the brake wheel, the sound acquisition device is controlled to work until the brake arm reaches the second position, and the first sound wave parameters generated by the collision between the brake pad and the brake wheel are output. During the process of the brake wheel stopping and the moving iron core moving, the sound acquisition device is controlled to work until the brake arm reaches the first position, and the second sound wave parameters generated by the collision between the moving iron core and the brake arm are output. Use the first acoustic wave parameter and / or the second acoustic wave parameter as the target acoustic wave parameter.
[0013] In one embodiment, the first acoustic parameter and / or the second acoustic parameter includes at least one of amplitude and frequency.
[0014] In one embodiment, the first acoustic parameter is used as the target acoustic parameter, and the first acoustic parameter includes amplitude or frequency; The step of comparing the target acoustic parameters with preset values to determine whether the driving device is abnormal includes: The amplitude of the first acoustic wave parameter is compared with a preset first amplitude to determine whether the spring's rebound force is abnormal. or, The frequency of the first acoustic wave parameter is compared with a preset first frequency to determine whether the spring has any abnormal jamming phenomenon.
[0015] In one embodiment, the second acoustic parameter is used as the target acoustic parameter, and the second acoustic parameter includes amplitude or frequency; The step of comparing the target acoustic parameters with preset values to determine whether the driving device is abnormal includes: The amplitude of the second acoustic parameter is compared with a preset second amplitude to determine whether there is any abnormality in the electromagnetic force of the electromagnet. or, The frequency of the second acoustic parameter is compared with a preset second frequency to determine whether the electromagnet is experiencing any jamming or abnormal phenomena.
[0016] In the technical solution of this invention, when the elevator brake is engaged, the brake arm is in the second position; when the elevator brake is disengaged, the brake arm is in the first position. During the movement of the brake arm, the drive device drives the brake pad to engage with the brake wheel, producing a sound; the drive device also produces a sound when it drives the brake arm to separate from the brake wheel. The sound acquisition device collects this sound information and processes and judges it through the control device. If the drive device is abnormal, the sound will differ from the sound during normal operation, thus indicating an abnormality in the drive device and providing an early warning. This allows for early warning before the elevator brake malfunctions and causes a dangerous accident. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 A schematic diagram of an embodiment of the elevator brake provided by the present invention and the structure of the brake wheel of the elevator; Figure 2 A flowchart illustrating an embodiment of the early warning method for an elevator brake provided by the present invention; Figure 3 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the early warning method of the elevator brake in this embodiment of the application.
[0019] Explanation of icon numbers: 100. Elevator brake; 1. Housing; 2. Brake wheel; 3. Brake arm; 31. Hinge point; 32. Guide shaft; 33. Brake bushing; 4. Drive unit; 41. Spring; 42. Electromagnet; 421. Moving iron core.
[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0024] The elevator traction mechanism brake is not only a crucial component of the elevator, but it is also frequently used as an overspeed protection device for the elevator's upward movement and as a protection device against unexpected car movement. Failure of its braking force can pose a significant danger, making monitoring of its operational status essential.
[0025] Traditional methods for monitoring brakes rely on microswitches, which are triggered when the brake is applied or released to verify the action. This method monitors the result of the action and can only detect whether the brake is effective or ineffective. It cannot detect subtle differences such as reduced braking effect during application or release, and the microswitch may not detect a brake malfunction until after a safety incident has occurred.
[0026] Some existing brake monitoring systems also have audible warning functions, but these functions can only determine whether there is a difference between the sound emitted during the brake's operation and the sound emitted during normal operation, thus determining whether the brake is faulty, but they cannot determine the specific location of the brake's fault.
[0027] This invention proposes an elevator brake 100, which aims to improve upon existing methods that can only detect whether the brake is effective or ineffective, and cannot determine the specific location of the brake failure.
[0028] Please see Figure 1In one embodiment of the present invention, the elevator brake 100 is used to cooperate with the elevator brake wheel 2. The elevator brake 100 includes a housing 1, a brake arm 3, a drive device 4, a sound acquisition device, and a control device. The housing 1 is used to be mounted on the elevator drive unit. The brake arm 3 is located inside the housing 1 and has a brake liner 33. The brake arm 3 is movably mounted to have a first position that separates the brake liner 33 from the brake wheel 2 and a second position that engages the brake liner 33 with the brake wheel 2 on its movement path. The drive device 4 is used to drive the movement of the brake arm 3. The sound acquisition device is located inside the housing 1 and is used to acquire the sound emitted during the movement of the brake arm 3. The control device is electrically connected to the sound acquisition device and is used to determine whether the drive device 4 is abnormal based on the sound acquired by the sound acquisition device. When the drive device 4 is abnormal, the sound emitted by the brake arm 3 during its movement is different from the sound emitted during normal operation.
[0029] In the technical solution of this invention, when the elevator brake 100 is braking, the brake arm 3 is in the second position; when the elevator brake 100 is lifted, the brake arm 3 is in the first position. During the movement of the brake arm 3, the drive device 4 drives the brake pad 33 to engage with the brake wheel 2, which produces a sound. The drive device 4 also produces a sound when it drives the brake arm 3 to separate from the brake wheel 2. The sound acquisition device collects this sound information and processes and judges it through the control device. If the drive device 4 is abnormal, the sound will differ from the sound during normal operation, thus indicating an abnormality in the drive device 4 and providing an early warning. This allows for a warning to be given before the elevator brake 100 malfunctions and causes a dangerous accident.
[0030] It should be noted that the elevator's brake wheel 2 is located on the output shaft of the drive unit. The braking of the elevator brake 100 refers to the process of reducing the speed of the brake wheel 2 and finally stopping its rotation by friction between the brake liner 33 and the brake wheel 2 when the brake liner 33 and the brake wheel 2 are in contact. The lifting of the elevator brake 100 refers to separating the brake liner 33 and the brake wheel 2, allowing the brake wheel 2 to rotate, thereby enabling the elevator to operate normally.
[0031] In an embodiment of the present invention, the driving device 4 includes a spring 41 and a driving part; one end of the brake arm 3 is hinged to the outer shell 1, the brake liner 33 is provided in the middle of the brake arm 3, and the other end of the brake arm 3 is connected to the outer shell 1 through the spring 41, so that the brake arm 3 is located in the second position under the action of the rebound force. The driving part is provided at the other end of the brake arm 3 to drive the brake arm 3 to overcome the elastic force of the spring 41 and be located in the first position; wherein, when the brake arm 3 moves from the first position to the second position under the action of the rebound force, the sound acquisition device is used to collect the sound of the collision between the brake liner 33 and the brake wheel 2; when the driving part drives the brake arm 3 to move from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the driving part and the brake arm 3.
[0032] In the above embodiment, the brake arm 3 is hinged to the outer shell 1 through the hinge point 31. The spring force of the spring 41 makes the brake liner 33 stick tightly to the brake wheel 2, ensuring the braking effect of the elevator brake 100. When the elevator brake 100 needs to be lifted, the drive unit can be driven to drive the brake arm 3 to overcome the spring force of the spring 41, so that the brake liner 33 and the brake wheel 2 are separated. When the brake arm 3 moves from the first position to the second position, the brake disc and the brake wheel 2 will collide and thus produce a sound. When the brake arm 3 moves from the second position to the first position, the drive unit and the brake arm 3 will collide and thus produce a sound. By comparing the above sound with the corresponding sound produced during normal operation, it is possible to determine whether there is an abnormality in the spring 41 or the drive unit, and to issue an early warning.
[0033] It should be noted that the present invention does not limit the specific structure of the driving unit. In the embodiments of the present invention, the driving unit includes an electromagnet 42, which is electrically connected to the control device. The electromagnet 42 is provided with a moving iron core 421, which is movably disposed so as to be able to collide and abut with the brake arm 3 on its moving path, and has a lifting position for driving the brake arm 3 from the second position to the first position, and a braking position for separating from the brake arm 3. When the electromagnet 42 drives the brake arm 3 from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the moving iron core 421 and the brake arm 3.
[0034] In other words, in the above embodiment, by setting the driving part as an electromagnet 42, when the electromagnet 42 is energized, the moving iron core 421 will move under the action of electromagnetic force and first collide with the brake arm 3 on its movement path, and then push the brake arm 3 to overcome the elastic force of the spring 41 until the moving iron core 421 is in the lifted position. At this time, the brake arm 3 is in the first position. When the electromagnet 42 is de-energized, the brake arm 3 will move towards the brake wheel 2 under the action of the rebound force of the spring 41, and push the moving iron core 421 to move in the same direction until the brake arm 3 is blocked by the brake wheel 2. The moving iron core 421 separates from the brake arm 3 under the action of inertia. At this time, the moving iron core 421 is in the braking position, and the brake arm 3 is in the second position. When the electromagnet 42 is energized and the moving iron core 421 moves, the sound acquisition device can collect the sound of the moving iron core 421 colliding and contacting with the brake arm 3. By comparing this sound with the corresponding sound generated during normal operation, it can be determined whether there is any abnormality in the electromagnetic force of the electromagnet 42.
[0035] It should be noted that the present invention does not limit the specific connection method of the brake arm 3 and the spring 41. In the embodiment of the present invention, the brake arm 3 is provided with a guide shaft 32, one end of the spring 41 is fixedly disposed on the guide shaft 32, and the other end is fixedly disposed on the outer casing 1. When the brake arm 3 is in the first position, the spring 41 is in a compressed state. (See attached diagram) Figure 1 Taking the right-side spring 41 as an example, when the electromagnet 42 drives the brake arm 3 to move from the second position to the first position, the guide shaft 32 follows the brake arm 3 on the right side to move to the right, causing the left end of the spring 41 to move to the right. Since the right end of the spring 41 is fixed to the outer shell 1, the spring 41 is in a compressed state at this time. When the electromagnet 42 is de-energized, the brake arm 3 will move from the first position to the second position under the action of the spring 41's rebound force.
[0036] In an embodiment of the present invention, two brake arms 3 are provided, respectively disposed on both sides of the brake wheel 2; when the elevator is running, both brake arms 3 are located in the first position, and when the elevator brakes, both brake arms 3 are located in the second position. That is to say, by providing multiple brake arms 3, on the one hand, the braking efficiency of the elevator brake 100 is improved, and on the other hand, the simultaneous movement of two brake arms 3 increases the volume, making it easier for the sound acquisition device to collect sound.
[0037] In an embodiment of the present invention, the sound acquisition device includes a microphone (not shown), which is spaced apart from the brake wheel 2 and positioned directly opposite the center of the brake wheel 2. That is, by separating the microphone from the brake wheel 2 and positioning it directly opposite the center of the brake wheel 2, the microphone can easily acquire sound. It should be noted that the present invention does not impose specific limitations on the specific arrangement of the microphone. To prevent the microphone from being affected by vibrations during the operation of the elevator brake 100, in this embodiment, the microphone is independently installed and has no direct connection to any related structure of the elevator brake 100. For example, the microphone can be fixedly installed on a support structure inside the elevator shaft and placed inside the housing 1 through an opening in the housing 1, thereby preventing vibrations that may occur during the normal operation of the elevator brake 100 from affecting the microphone's sound reception. In other words, because the microphone in this application is independently installed, monitoring existing elevators can be performed without any modifications to the existing elevator structure.
[0038] Please refer to further information. Figure 2 The present invention also proposes a warning method for an elevator brake 100 as described in any of the above embodiments, the warning method for the elevator brake 100 comprising the following steps: S10: Obtain the target sound wave parameters collected by the sound acquisition device, and identify the component that emits the sound based on the target sound wave parameters; It should be noted that since the elevator brake 100 generates a lot of noise during operation, the target sound wave parameters collected by the sound acquisition device have been processed to remove noise. Specifically, for example, the target sound wave parameters can be collected multiple times during the normal operation of the elevator brake 100. After collecting a large amount of data, the data is filtered according to the characteristics of the brake to obtain data that has been processed to remove noise and prevent external interference.
[0039] S20: Compare the target acoustic parameters with preset values to determine whether the driving device 4 is abnormal.
[0040] It should be noted that in this step, the preset value can be a pre-set value, or it can be a "normal value" obtained by processing the values collected multiple times during the normal operation of the elevator brake 100, and the "normal value" is set as the preset value.
[0041] In an embodiment of the present invention, the elevator brake 100 further includes a spring 41 and an electromagnet 42, wherein a moving iron core 421 is provided on the electromagnet 42, and step S10 includes: S11: During the rotation of the brake wheel 2 and the movement of the brake arm 3 toward the brake wheel 2, the sound acquisition device is controlled to work until the brake arm 3 reaches the second position, and the first sound wave parameters generated by the collision between the brake pad 33 and the brake wheel 2 are output. In this step, since the brake wheel 2 rotates and the brake arm 3 moves toward the brake wheel 2, it can be determined that the process is caused by the rebound force of the spring 41, which causes the brake arm 3 to adhere to the brake wheel 2. Therefore, the information collected by the sound acquisition device at this time is the sound generated by the collision between the brake pad 33 and the brake wheel 2. In addition, there may also be the sound emitted when the brake arm 3 rotates around its rotation axis in the positive direction during this process.
[0042] S12: During the process of the brake wheel 2 stopping and the moving iron core 421 moving, control the sound acquisition device to work until the brake arm 3 reaches the first position, and output the second sound wave parameters generated by the collision of the moving iron core 421 and the brake arm 3. In this step, since the brake wheel 2 stops, it is known that the elevator brake 100 is in a braking state. At this time, the brake arm 3 is in contact with the brake wheel 2. Therefore, during the process of driving the moving iron core 421, the information collected by the sound acquisition device is the sound generated by the collision between the moving iron core 421 and the brake arm 3. In addition, there may also be a sound generated when the brake arm 3 rotates in the opposite direction around its rotation axis. Moreover, there is a slight difference between the sound of the brake arm 3 rotating in the opposite direction and the sound of the brake arm 3 rotating in the forward direction. That is to say, the sound acquisition device can also determine the component that emits the sound by the sound of the brake arm 3 rotating.
[0043] S13: Use the first acoustic wave parameter and / or the second acoustic wave parameter as the target acoustic wave parameter.
[0044] In this embodiment, the first acoustic parameter is generated by the spring 41 driving the brake arm 3, and the second acoustic parameter is generated by the electromagnet 42 driving the brake arm 3. By analyzing the first acoustic parameter and / or the second acoustic parameter, it can be determined whether the spring 41 and / or the electromagnet 42 are abnormal.
[0045] It should be noted that the present invention does not limit the specific parameters of the sound waves. In the embodiments of the present invention, the first sound wave parameter and / or the second sound wave parameter includes at least one of amplitude and frequency. Specifically, in the embodiments of the present invention, the relevant parameters are obtained by converting the collected sound waves into corresponding sound pressure waveforms.
[0046] In an embodiment of the present invention, when the first acoustic parameter is used as the target acoustic parameter, and the first acoustic parameter includes amplitude or frequency; Step S20 includes: A21: Compare the amplitude of the first acoustic wave parameter with the preset first amplitude to determine whether the rebound force of the spring 41 is abnormal; or, B21: Compare the frequency of the first sound wave parameter with the preset first frequency to determine whether the spring 41 has any jamming abnormality.
[0047] It should be noted that in step A21 above, the amplitude of the first acoustic parameter is determined by the magnitude of the force of the brake pad 33 colliding with the brake wheel 2, and the magnitude of this force is directly related to the rebound force of the spring 41. Therefore, when the amplitude of the first acoustic parameter differs from the preset first amplitude, it indicates that the rebound force of the spring 41 is abnormal, prompting maintenance personnel to conduct inspection and repair.
[0048] In step B21 above, the frequency of the first sound wave is determined by the pitch. Therefore, when the frequency of the first sound wave differs from the preset first frequency, it indicates that the spring 41 is stuck abnormally. As for the specific cause of the stuckness, it may be that there are foreign objects between the components, causing the spring 41 to drive the brake arm 3, resulting in abnormal collision between the brake bushing 33 and the brake wheel 2. It may also be due to abnormal connection of the hinge point, resulting in abnormal sound. This invention does not limit it. In other embodiments of this invention, the sound pressure waveform of the first sound wave can be compared with the preset first sound pressure waveform. As long as there is a difference, it indicates that the operation of the elevator brake is abnormal, so as to prompt maintenance personnel to check and repair.
[0049] In an embodiment of the present invention, the second acoustic parameter is used as the target acoustic parameter, and the second acoustic parameter includes amplitude or frequency; Step S20 includes: C21: Compare the amplitude of the second acoustic parameter with the preset second amplitude to determine whether there is any abnormality in the electromagnetic force of the electromagnet 42; or, D21: Compare the frequency of the second acoustic parameter with the preset second frequency to determine whether the electromagnet 42 has any jamming abnormality.
[0050] It should be noted that in step C21 above, the amplitude of the second acoustic parameter is determined by the magnitude of the force of the moving iron core 421 colliding with the brake arm 3, and the magnitude of this force is directly related to the electromagnetic force of the electromagnet 42. Therefore, when the amplitude of the second acoustic parameter differs from the preset second amplitude, it indicates that the electromagnetic force of the electromagnet 42 is abnormal, prompting maintenance personnel to conduct inspection and repair.
[0051] In step D21 above, the frequency of the second sound wave is determined by the response time of the electromagnet 42. Therefore, when the frequency of the second sound wave differs from the preset second frequency, it indicates that the electromagnet 42 is experiencing a jamming abnormality. As for the specific cause of the jamming, it may be due to foreign objects between components, causing the electromagnet 42 to drive the brake arm 3, resulting in an abnormal collision between the moving iron core 421 and the brake arm 3. It may also be due to an abnormal connection at the hinge point, resulting in an abnormal sound. This invention does not limit these possibilities. In other embodiments of this invention, the sound pressure waveform of the second sound wave can be compared with the preset second sound pressure waveform. As long as there is a difference, it indicates that the operation of the elevator brake is abnormal, prompting maintenance personnel to conduct inspection and repair.
[0052] In addition, the control device provided in this application includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to execute the elevator brake warning method in the first embodiment described above.
[0053] The following is for reference. Figure 3 The diagram illustrates a structural schematic of a control device suitable for implementing embodiments of this application. The control device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 3 The control device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.
[0054] like Figure 3As shown, the control device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the control device. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the control device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a control device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.
[0055] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0056] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0057] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. An elevator brake for cooperating with the elevator brake wheel, characterized in that, include: The outer casing is used to mount the elevator's drive unit; A brake arm is disposed inside the housing and a brake liner is provided thereon. The brake arm is movably disposed such that it has a first position that separates the brake liner from the brake wheel and a second position that makes the brake liner and the brake wheel fit together in its movement path. A drive unit for driving the movement of the brake arm; A sound acquisition device, located inside the housing, is used to acquire the sound emitted during the movement of the brake arm; as well as, A control device, electrically connected to the sound acquisition device, is used to determine whether the drive device is malfunctioning based on the sound acquired by the sound acquisition device; When the drive device malfunctions, the sound emitted by the brake arm during its movement differs from the sound emitted during normal operation.
2. The elevator brake as described in claim 1, characterized in that, The driving device includes a spring and a driving unit; One end of the brake arm is hinged to the housing, the brake liner is provided in the middle of the brake arm, and the other end of the brake arm is connected to the housing through the spring so that the brake arm is located in the second position under the action of the rebound force. The driving part is provided at the other end of the brake arm to drive the brake arm to overcome the spring force and be located in the first position. When the brake arm moves from the first position to the second position under the action of the rebound force, the sound acquisition device is used to collect the sound of the collision between the brake pad and the brake wheel; When the drive unit drives the brake arm to move from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the drive unit and the brake arm.
3. The elevator brake as described in claim 2, characterized in that, The driving unit includes an electromagnet, which is electrically connected to the control device. The electromagnet is provided with a moving iron core, which is movably disposed so that it can collide and abut against the brake arm on its moving path. It has a lifting position that drives the brake arm to move from the second position to the first position, and a braking position that separates from the brake arm. When the electromagnet drives the brake arm to move from the second position to the first position, the sound acquisition device is used to collect the sound of the collision between the moving iron core and the brake arm.
4. The elevator brake as described in claim 1, characterized in that, Two brake arms are provided, which are respectively located on both sides of the brake wheel; When the elevator is running, both brake arms are in the first position; when the elevator brakes, both brake arms are in the second position.
5. The elevator brake as described in claim 1, characterized in that, The sound acquisition device includes a microphone, which is spaced apart from the brake wheel and is positioned directly opposite the center of the brake wheel.
6. A warning method for an elevator brake, used in any one of claims 1 to 5, characterized in that, Includes the following steps: The target sound wave parameters collected by the sound acquisition device are obtained, and the component emitting the sound is identified based on the target sound wave parameters; The target acoustic parameters are compared with preset values to determine whether the driving device is malfunctioning.
7. The early warning method for elevator brakes as described in claim 6, characterized in that, The elevator brake also includes a spring and an electromagnet, with a moving iron core mounted on the electromagnet. The step of acquiring the target sound wave parameters collected by the sound acquisition device and identifying the component emitting the sound based on the target sound wave parameters includes: During the rotation of the brake wheel and the movement of the brake arm toward the brake wheel, the sound acquisition device is controlled to work until the brake arm reaches the second position, and the first sound wave parameters generated by the collision between the brake pad and the brake wheel are output. During the process of the brake wheel stopping and the moving iron core moving, the sound acquisition device is controlled to work until the brake arm reaches the first position, and the second sound wave parameters generated by the collision between the moving iron core and the brake arm are output. Use the first acoustic wave parameter and / or the second acoustic wave parameter as the target acoustic wave parameter.
8. The early warning method for elevator brakes as described in claim 7, characterized in that, The first acoustic parameter and / or the second acoustic parameter include at least one of amplitude and frequency.
9. The early warning method for elevator brakes as described in claim 8, characterized in that, When the first acoustic parameter is used as the target acoustic parameter, and the first acoustic parameter includes amplitude or frequency; The step of comparing the target acoustic wave parameters with preset values to determine whether the driving device is abnormal includes: The amplitude of the first acoustic wave parameter is compared with a preset first amplitude to determine whether the spring's rebound force is abnormal. or, The frequency of the first acoustic wave parameter is compared with a preset first frequency to determine whether the spring has any abnormal jamming phenomenon.
10. The early warning method for an elevator brake as described in claim 8, characterized in that, When the second acoustic parameter is used as the target acoustic parameter, and the second acoustic parameter includes amplitude or frequency; The step of comparing the target acoustic wave parameters with preset values to determine whether the driving device is abnormal includes: The amplitude of the second acoustic parameter is compared with a preset second amplitude to determine whether there is any abnormality in the electromagnetic force of the electromagnet. or, The frequency of the second acoustic parameter is compared with a preset second frequency to determine whether the electromagnet is experiencing any jamming or abnormal phenomena.