A method and apparatus for elevator car floor vibration reduction

Abstract

The present application belongs to the technical field of elevator car floor vibration reduction, and provides an elevator car floor vibration reduction method, comprising: when the amplitude of the vibration caused by the elevator car floor exceeds the standard, analyzing and obtaining the vibration frequency band of the amplitude exceeding the standard; determining the target position of the amplitude exceeding the standard according to the vibration frequency band of the amplitude exceeding the standard; and designing a vibration absorber based on the target position and the corresponding vibration frequency band to reduce the vibration of the elevator car floor. The present application can accurately locate the corresponding frequency band and the corresponding position of the abnormal vibration point of the elevator car floor structure by model analysis or field modal analysis and other vibration analysis methods, and can accurately process the vibration, thereby improving the accuracy and comprehensiveness of the car floor vibration reduction.

Description

Technical Field

[0001] This invention relates to the field of elevator car bottom vibration reduction technology, and particularly to an elevator car bottom vibration reduction method and device. Background Technology

[0002] Customers now have increasingly higher requirements for elevator comfort, vibration, and noise levels. However, elevator configurations and car bottom structures are becoming more and more diverse. Depending on the shaft size of different customers, the corresponding elevator size is also different. Elevators delivered to the site will more or less encounter some vibration problems in special frequency ranges. These special vibrations are difficult to adjust and avoid through conventional engineering methods. Therefore, how to deal with these special vibrations is an urgent problem to be solved.

[0003] Since abnormal vibration points in the elevator car bottom structure will directly affect the car's vibration and disrupt the elevator's ride comfort, the existing vibration reduction method only adds a layer of anti-vibration rubber in the middle of the car bottom. This vibration reduction method cannot accurately shield some of the elevator's own special frequency vibrations, so its vibration reduction effect is not comprehensive. Summary of the Invention

[0004] To address this problem, the present invention provides a method and apparatus for vibration reduction at the bottom of an elevator car.

[0005] To achieve the above-mentioned objectives of this invention, the invention is implemented through the following techniques:

[0006] In some embodiments, the present invention provides a method for vibration reduction at the bottom of an elevator car, comprising:

[0007] When the amplitude of vibration caused by the elevator car bottom exceeds the standard, the vibration frequency range of the excessive amplitude is analyzed and obtained.

[0008] Based on the vibration frequency range where the amplitude exceeds the standard, determine the target location where the amplitude exceeds the standard;

[0009] A vibration absorber is designed based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car.

[0010] In some embodiments, before analyzing and obtaining the vibration frequency range where the amplitude exceeds the standard when the vibration caused by the elevator car bottom is mentioned, the method further includes:

[0011] Obtain the vibration waveform data of the elevator;

[0012] Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

[0013] In some embodiments, acquiring the vibration waveform data of the elevator includes:

[0014] The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model.

[0015] or;

[0016] Vibration waveform data of the elevator were obtained through on-site vibration testing.

[0017] In some embodiments, determining the target location of the amplitude exceeding the limit based on the vibration frequency range includes:

[0018] The vibration frequency range with excessive amplitude was analyzed using FFT.

[0019] Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

[0020] In some embodiments, designing a vibration absorber based on the target location and the corresponding vibration frequency band to reduce vibration at the bottom of the elevator car includes:

[0021] The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula:

[0022] m=k / ω 2

[0023] Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed;

[0024] Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

[0025] An elevator car bottom vibration damping device includes:

[0026] The analysis module is used to analyze and obtain the vibration frequency range where the amplitude exceeds the standard when the vibration caused by the elevator car bottom exceeds the standard.

[0027] The determination module is used to determine the target location of the amplitude exceeding the standard based on the vibration frequency range where the amplitude exceeds the standard;

[0028] The vibration reduction module is used to design a vibration absorber based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car.

[0029] In some embodiments, it further includes: a determination module, configured to:

[0030] Obtain the vibration waveform data of the elevator;

[0031] Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

[0032] In some embodiments, the determining module is configured to:

[0033] The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model.

[0034] or;

[0035] Vibration waveform data of the elevator were obtained through on-site vibration testing.

[0036] In some embodiments, the determining module is configured to:

[0037] The vibration frequency range with excessive amplitude was analyzed using FFT.

[0038] Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

[0039] In some embodiments, the vibration damping module is used for:

[0040] The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula:

[0041] m=k / ω 2

[0042] Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed;

[0043] Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

[0044] The elevator car bottom vibration reduction method and device provided by the present invention have at least the following beneficial effects:

[0045] 1) This invention measures the abnormal vibration points in the elevator car bottom structure through model analysis, on-site modal analysis, and other vibration analysis methods. It can accurately locate the corresponding frequency range and position, and then accurately process the vibration, thereby improving the accuracy and comprehensiveness of car bottom vibration reduction.

[0046] 2) This invention improves the targeted reduction of car bottom vibration by arranging a corresponding dynamic vibration absorber structure at the location of the abnormal vibration point for the vibration of its frequency range. The structure is simple and will not affect the car bottom structure or related configurations of the elevator. Attached Figure Description

[0047] The preferred embodiments will be described below in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of an elevator car bottom vibration reduction method and device.

[0048] Figure 1 This is a schematic diagram of an embodiment of an elevator car bottom vibration reduction method according to the present invention;

[0049] Figure 2 This is a schematic diagram of an embodiment of an elevator car bottom vibration reduction method according to the present invention;

[0050] Figure 3 This is a schematic diagram of the installation of the vibration damper in this invention;

[0051] Figure 4 This is a schematic diagram of one embodiment of an elevator car bottom vibration damping device according to the present invention. Detailed Implementation

[0052] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0053] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or sets.

[0054] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0055] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0056] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0058] It should be noted that:

[0059] The Fast Fourier Transform (FFT) is an efficient algorithm for the Discrete Fourier Transform (DFT). The Fourier Transform is one of the most fundamental methods in time-domain to frequency-domain transform analysis. In the field of digital processing, the Discrete Fourier Transform (DFT) is the basis for many digital signal processing methods.

[0060] FFT can be basically divided into two categories: time decimation method and frequency decimation method. However, the general time decimation method and frequency decimation method can only handle the case where the length N = 2M. In addition, there is the combinatorial radix-4 FFT to handle FFT of general length.

[0061] Decimation, in essence, is the process of dividing a long sequence into shorter sequences, which can be performed in either the time or frequency domain. The most common time-domain decimation method is to continuously transform the long sequence into shorter sequences based on whether they are odd or even. This results in the input sequence being in reverse order and the output sequence being in sequential order; this is the Coolly-Tukey algorithm.

[0062] In one embodiment, such as Figure 1 As shown, this invention provides an embodiment of an elevator car bottom vibration reduction method, comprising:

[0063] S101 When the amplitude of vibration caused by the elevator car bottom exceeds the standard, analyze and obtain the vibration frequency range where the amplitude exceeds the standard.

[0064] Specifically, by using model analysis or on-site vibration testing, the vibration waveform data of the elevator is obtained. Then, the amplitude of the vibration caused by the elevator car bottom mechanism is analyzed to see if it exceeds the standard, that is, exceeds the preset amplitude threshold. Generally, the preset amplitude threshold is set according to the customer's requirements for elevator comfort, vibration and noise.

[0065] S102 determines the target location of the amplitude exceeding the standard by modal analysis based on the vibration frequency range where the amplitude exceeds the standard.

[0066] Specifically, modal analysis is performed in two ways: through computer model simulation or through field test excitation. A mode is the inherent vibration characteristic of a mechanical structure, and each mode has a specific natural frequency and mode shape. Computer model simulation modal analysis obtains the various modes of the model, including their natural frequencies and mode shapes, through finite element analysis. Field test excitation modal analysis involves manually inputting a specific excitation signal, collecting the vibration response at various points, and then obtaining the modal parameters for each mode through different parameter identification methods. Based on the vibration frequency range where the amplitude exceeds the limit and its corresponding mode, the mode shape of the corresponding mode is obtained, which is the target location where the amplitude exceeds the limit.

[0067] In real-world scenarios, the elevator car bottom structure comprises multiple parts. By determining the specific location of abnormal vibrations in the elevator car bottom, the abnormal vibrations can be analyzed more accurately.

[0068] S103 designs a vibration absorber based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car.

[0069] Specifically, the target location refers to the position where the amplitude of vibration at the bottom of the elevator car exceeds the standard, and the vibration absorber includes a dynamic vibration absorber.

[0070] Regarding the settings of the vibration absorber, such as Figure 3 As shown, for car bottoms with special structures and dimensions, fixing holes for installing corresponding dynamic vibration absorbers are reserved at the front, rear, left, and right sides of the upper car bottom during the structural design stage. For contracts with special requirements, dynamic vibration absorbers are installed at the corresponding positions by testing or simulating the modal characteristics of the car bottom.

[0071] The dynamic vibration absorber consists of a support frame 1, an elastic component 2, and a metal block 3. The support frame 1 connects the car bottom component 4 and the elastic component 2. The metal block 3 is installed within and enclosed by the elastic component 2, preventing it from falling out during normal operation. The number of metal blocks 3 can be determined according to requirements; the number can be adjusted accordingly for different vibration frequency ranges.

[0072] This invention proposes a method for reducing vibration at the elevator car bottom. Specifically, the abnormal vibration points in the elevator car bottom structure are measured beforehand using model analysis, on-site modal analysis, and other vibration analysis methods. The corresponding frequency range and location are determined, and appropriate dynamic vibration absorber structures are then installed at these locations to specifically reduce car bottom vibration. The advantage of this method is that it can accurately shield certain specific frequency vibrations generated by the elevator itself without causing any other impact on the elevator's configuration or car bottom structure.

[0073] In this embodiment, a method for protecting and reducing car bottom vibration is provided. The vibration frequency and specific location of abnormal vibration points under the car bottom are obtained through preliminary vibration simulation or test analysis. Then, a method for solving abnormal vibration under the car bottom is implemented by designing and adding a dynamic vibration absorber.

[0074] In one embodiment, before analyzing and obtaining the vibration frequency range where the amplitude exceeds the standard when the vibration caused by the elevator car bottom is mentioned, the method further includes:

[0075] Obtain the vibration waveform data of the elevator;

[0076] Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

[0077] Specific elevator vibration amplitude requirements can be found in the national standard GB_T10058-2009: the maximum peak-to-peak value of the vertical (Z-axis) vibration of the passenger elevator car during constant acceleration should not exceed 0.30 m / s². 2 The peak value of A95 should not exceed 0.20 m / s. 2 The maximum peak-to-peak value of the horizontal (X-axis and Y-axis) vibration during passenger elevator car operation should not exceed 0.20 m / s². 2 The peak value of A95 should not exceed 0.15 m / s. 2 It can also be determined according to the requirements of each company.

[0078] In one embodiment, acquiring the elevator vibration waveform data includes:

[0079] The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model.

[0080] or;

[0081] Vibration waveform data of the elevator were obtained through on-site vibration testing.

[0082] In one embodiment, determining the target location of the amplitude exceeding the limit based on the vibration frequency range includes:

[0083] The vibration frequency range with excessive amplitude was analyzed using FFT.

[0084] Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

[0085] In this embodiment, as Figure 2 As shown, before designing a vibration absorber, there are two methods to obtain the target location and vibration frequency range of the excessive frequency mode, i.e., the amplitude exceeding the standard.

[0086] First, the vibration waveform data of the elevator can be obtained by analyzing the vibration of the whole elevator model during the design process. If it is found that the vibration amplitude caused by the car bottom structure exceeds the standard during elevator operation, the vibration frequency range at the excessive vibration amplitude is analyzed by FFT. Then, the modal analysis of the elevator car bottom structure model is performed by computer. The specific location of the vibration in the frequency range is found by the modal analysis of the excessive vibration frequency range. At this time, the vibration frequency range and its related location of the abnormal vibration point of the car bottom can be obtained.

[0087] Second, on-site vibration testing equipment is used to determine whether the vibration amplitude of the car bottom exceeds the standard. If it does, FFT analysis is used to identify and record the vibration frequency range at the point where the vibration amplitude exceeds the standard. Then, modal testing is performed on the elevator car bottom test excitation on-site. Modal mode analysis of the vibration frequency range exceeding the standard can reveal the specific location where the vibration occurs. At this time, the vibration frequency range and related location of the abnormal vibration point at the car bottom can also be obtained.

[0088] In one embodiment, designing a vibration absorber based on the target location and the corresponding vibration frequency band to reduce vibration at the bottom of the elevator car includes:

[0089] The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula:

[0090] m=k / ω 2

[0091] Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed;

[0092] Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

[0093] Specifically, the required mass of the dynamic vibration absorber can be calculated from the frequency of the abnormal vibration point at the bottom of the car. The principle is as follows: To make the vibration of the main system equal to zero, the natural angular frequency ωa of the dynamic vibration absorber must be designed to be equal to the excitation angular frequency ω to be absorbed. The following formula can be used as a reference for design.

[0094] m=k / ω 2

[0095] Where: m is the vibration mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed.

[0096] The vibration absorber can be fixed by identifying the specific location of the abnormal vibration point. The fixing method can be referenced as follows: Figure 3 As shown:

[0097] For car bottoms with special structures and dimensions, fixing holes for installing corresponding dynamic vibration absorbers are reserved at the front, rear, left, and right sides of the upper car bottom during the structural design stage. For contracts with special requirements, dynamic vibration absorbers are installed at the corresponding positions by testing or simulating the modal characteristics of the car bottom.

[0098] The dynamic vibration absorber consists of a support frame 1, an elastic component 2, and a metal block 3. The support frame 1 connects the car bottom component 4 and the elastic component 2. The metal block 3 is installed within and enclosed by the elastic component 2, preventing it from falling out during normal operation. The number of metal blocks 3 can be determined according to requirements; the number can be adjusted accordingly for different vibration frequency ranges.

[0099] This invention focuses on protecting a method for reducing car floor vibration. It involves obtaining the vibration frequency and specific location of abnormal vibration points under the car floor through preliminary vibration simulation or test analysis, and then solving the abnormal vibration of the car floor by designing and adding a dynamic vibration absorber.

[0100] The vibration absorber shown in this invention can take many forms. Any component that achieves vibration absorption by covering a mass block with an elastic element can be called a vibration absorber and is within the protection scope of this invention. Any vibration absorber that can achieve vibration absorption by adding mass is a vibration absorber as described in this invention and is within the protection scope of this invention.

[0101] In one embodiment, the present invention provides an elevator car bottom vibration damping device, such as... Figure 4 As shown, it includes:

[0102] Analysis module 101 is used to analyze and obtain the vibration frequency range where the amplitude exceeds the standard when the vibration caused by the elevator car bottom exceeds the standard.

[0103] Specifically, by using model analysis or on-site vibration testing, the vibration waveform data of the elevator is obtained. Then, the amplitude of the vibration caused by the elevator car bottom mechanism is analyzed to see if it exceeds the standard, that is, exceeds the preset amplitude threshold. Generally, the preset amplitude threshold is set according to the customer's requirements for elevator comfort, vibration and noise.

[0104] The determination module 102 is used to determine the target location of the amplitude exceeding the standard based on the vibration frequency range where the amplitude exceeds the standard.

[0105] In real-world scenarios, the elevator car bottom structure comprises multiple parts. By determining the specific location of abnormal vibrations in the elevator car bottom, the abnormal vibrations can be analyzed more accurately.

[0106] The vibration reduction module 103 is used to design a vibration absorber based on the target position and the corresponding vibration frequency range to reduce the vibration of the elevator car bottom.

[0107] Specifically, the target location refers to the position where the amplitude of vibration at the bottom of the elevator car exceeds the standard, and the vibration absorber includes a dynamic vibration absorber.

[0108] Regarding the settings of the vibration absorber, such as Figure 3 As shown, for car bottoms with special structures and dimensions, fixing holes for installing corresponding dynamic vibration absorbers are reserved at the front, rear, left, and right sides of the upper car bottom during the structural design stage. For contracts with special requirements, dynamic vibration absorbers are installed at the corresponding positions by testing or simulating the modal characteristics of the car bottom.

[0109] The dynamic vibration absorber consists of a support frame 1, an elastic component 2, and a metal block 3. The support frame 1 connects the car bottom component 4 and the elastic component 2. The metal block 3 is installed within and enclosed by the elastic component 2, preventing it from falling out during normal operation. The number of metal blocks 3 can be determined according to requirements; the number can be adjusted accordingly for different vibration frequency ranges.

[0110] This invention proposes a car bottom vibration reduction device. Beforehand, abnormal vibration points in the elevator car bottom structure can be measured using model analysis, on-site modal analysis, and other vibration analysis methods. The corresponding frequency range and location are determined, and appropriate dynamic vibration absorber structures are then placed at these locations to specifically reduce car bottom vibration. The advantages of this method are: it can accurately shield certain specific frequency vibrations generated by the elevator itself without causing other impacts on the elevator's configuration or car bottom structure.

[0111] In this embodiment, a device for protecting and reducing car floor vibration is provided. The vibration frequency and specific location of abnormal car floor vibration points are obtained through preliminary vibration simulation or test analysis. Then, a device for solving abnormal car floor vibration is designed by adding a dynamic vibration absorber.

[0112] In one embodiment, it further includes: a judgment module, used for:

[0113] Obtain the vibration waveform data of the elevator;

[0114] Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

[0115] In one embodiment, the determining module is configured to:

[0116] The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model.

[0117] or;

[0118] Vibration waveform data of the elevator were obtained through on-site vibration testing.

[0119] In one embodiment, the determining module is configured to:

[0120] The vibration frequency range with excessive amplitude was analyzed using FFT.

[0121] Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

[0122] In this embodiment, as Figure 2 As shown, before designing a vibration absorber, there are two methods to obtain the target location and vibration frequency range of the excessive frequency mode, i.e., the amplitude exceeding the standard.

[0123] Third, the vibration waveform data of the elevator can be obtained by analyzing the vibration of the whole elevator model during the design process. If it is found that the vibration amplitude caused by the car bottom structure exceeds the standard during elevator operation, the vibration frequency range at the excessive vibration amplitude is analyzed by FFT. Then, the modal analysis of the elevator car bottom structure model is performed by computer. The specific location of the vibration in the frequency range is found by the modal analysis of the excessive vibration frequency range. At this time, the vibration frequency range and its related location of the abnormal vibration point of the car bottom can be obtained.

[0124] Fourth, on-site vibration testing equipment is used to determine whether the vibration amplitude of the car bottom exceeds the standard. If it does, FFT analysis is used to identify and record the vibration frequency range at the point where the vibration amplitude exceeds the standard. Then, modal testing is performed on the elevator car bottom test excitation on-site. Modal mode analysis of the vibration mode in the frequency range exceeding the standard can reveal the specific location where the vibration occurs. At this time, the vibration frequency range and related location of the abnormal vibration point at the car bottom can also be obtained.

[0125] In one embodiment, the vibration damping module is used for:

[0126] The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula:

[0127] m=k / ω 2

[0128] Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed;

[0129] Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

[0130] Specifically, the required mass of the dynamic vibration absorber can be calculated from the frequency of the abnormal vibration point at the bottom of the car. The principle is as follows: To make the vibration of the main system equal to zero, the natural angular frequency ωa of the dynamic vibration absorber must be designed to be equal to the excitation angular frequency ω to be absorbed. The following formula can be used as a reference for design.

[0131] m=k / ω2

[0132] Where: m is the vibration mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed.

[0133] The vibration absorber can be fixed by identifying the specific location of the abnormal vibration point. The fixing method can be referenced as follows: Figure 3 As shown:

[0134] For car bottoms with special structures and dimensions, fixing holes for installing corresponding dynamic vibration absorbers are reserved at the front, rear, left, and right sides of the upper car bottom during the structural design stage. For contracts with special requirements, dynamic vibration absorbers are installed at the corresponding positions by testing or simulating the modal characteristics of the car bottom.

[0135] The dynamic vibration absorber consists of a support frame 1, an elastic component 2, and a metal block 3. The support frame 1 connects the car bottom component 4 and the elastic component 2. The metal block 3 is installed within and enclosed by the elastic component 2, preventing it from falling out during normal operation. The number of metal blocks 3 can be determined according to requirements; the number can be adjusted accordingly for different vibration frequency ranges.

[0136] This invention focuses on protecting a device for reducing car floor vibration. It obtains the vibration frequency and specific location of abnormal vibration points under the car floor through preliminary vibration simulation or test analysis, and then solves the abnormal vibration of the car floor by designing and adding a dynamic vibration absorber.

[0137] The vibration absorber shown in this invention can take many forms. Any component that achieves vibration absorption by covering a mass block with an elastic element can be called a vibration absorber and is within the protection scope of this invention. Any vibration absorber that can achieve vibration absorption by adding mass is a vibration absorber as described in this invention and is within the protection scope of this invention.

[0138] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of program modules is merely an example. In practical applications, the above functions can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program units or modules to complete all or part of the functions described above. The program modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software program unit. Furthermore, the specific names of the program modules are only for easy differentiation and are not intended to limit the scope of protection of this application.

[0139] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0140] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0141] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; the division of modules or units is merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interface; the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.

[0142] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0143] Furthermore, the functional units in the various embodiments of this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The integrated unit described above can be implemented in hardware or as a software functional unit.

[0144] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for vibration reduction at the bottom of an elevator car, characterized in that, include: When the amplitude of vibration caused by the elevator car bottom exceeds the standard, the vibration frequency range of the excessive amplitude is analyzed and obtained. Based on the vibration frequency range where the amplitude exceeds the standard, determine the target location where the amplitude exceeds the standard; A vibration absorber is designed based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car. The design of a vibration absorber based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car includes: The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula: m=k / ω 2 Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed; Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

2. The elevator car bottom vibration reduction method according to claim 1, characterized in that, Before analyzing and obtaining the vibration frequency range exceeding the standard when the vibration caused by the elevator car bottom exceeds the standard, the method further includes: Obtain the vibration waveform data of the elevator; Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

3. The elevator car bottom vibration reduction method according to claim 2, characterized in that, The acquisition of elevator vibration waveform data includes: The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model. or; Vibration waveform data of the elevator were obtained through on-site vibration testing.

4. The method for reducing vibration at the bottom of an elevator car according to claim 1, characterized in that, Determining the target location of the excessive amplitude based on the vibration frequency range includes: The vibration frequency range with excessive amplitude was analyzed using FFT. Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

5. A vibration damping device for the bottom of an elevator car, characterized in that, include: The analysis module is used to analyze and obtain the vibration frequency range where the amplitude exceeds the standard when the vibration caused by the elevator car bottom exceeds the standard. The determination module is used to determine the target location of the amplitude exceeding the standard based on the vibration frequency range where the amplitude exceeds the standard; The vibration reduction module is used to design a vibration absorber based on the target location and the corresponding vibration frequency range to reduce vibration at the bottom of the elevator car. The vibration damping module is used for: The required mass of the vibration absorber can be calculated using the vibration frequency range corresponding to the target location, as shown in the following formula: m=k / ω 2 Where: m is the vibrating mass of the vibration absorber; k is the elastic coefficient of the vibration absorber; ω is the excitation angular frequency to be absorbed; Based on the target location, the position of the vibration absorber is determined and fixed to secure the vibration absorber.

6. The elevator car bottom vibration damping device according to claim 5, characterized in that, Also includes: The judgment module is used for: Obtain the vibration waveform data of the elevator; Based on the vibration waveform data of the elevator, it is determined whether the amplitude of the elevator car bottom exceeds the standard.

7. The elevator car bottom vibration damping device according to claim 6, characterized in that, The judgment module is used for: The vibration waveform data of the elevator was obtained through simulation and analysis using an elevator model. or; Vibration waveform data of the elevator were obtained through on-site vibration testing.

8. The elevator car bottom vibration damping device according to claim 5, characterized in that, The determining module is used for: The vibration frequency range with excessive amplitude was analyzed using FFT. Modal analysis is performed on the vibration frequency range where the amplitude exceeds the standard to obtain the target location where the amplitude exceeds the standard.

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