Eddy current damper fault detection method and system
By acquiring and sorting the vibration signal sequence in the eddy current damper fault detection, and determining the target signal based on the similarity threshold for identification, the problem of inaccurate extraction of fault signals is solved and the accuracy of fault detection is improved.
Patent Information
- Application Number
- CN202411881880.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-03-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing eddy current damper fault detection methods have problems with inaccurate extraction when acquiring the fault signal, resulting in low accuracy of subsequent fault detection.
By obtaining the vibration signal sequence of the eddy current damper under preset excitation conditions, and judging the similarity between adjacent vibration signals based on the similarity threshold, determining the target vibration signal, it is input to the fault feature recognition model for identification.
It improves the accuracy of determining the fault signal, enhances the identification accuracy of subsequent fault detection models, and avoids the influence of different vibration signals caused by environmental factors.
Smart Images
Figure CN119555361A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of fault detection, and in particular relates to a fault detection method and system for an eddy current damper. Background Art
[0002] Eddy current damper is a common damping device. It does not rely on mechanical friction to dissipate energy, has no working fluid, and does not have leakage and sealing problems. It has the advantages of high reliability, good durability and relatively simple structure. It is particularly suitable for use in working environments that require long fatigue life and are not easy to maintain.
[0003] At present, fault detection for eddy current dampers is to obtain vibration signals at various times and directly input the vibration signals into the fault detection model for identification. This will require the model to identify a large number of normal vibration signals, resulting in redundant identification data. In addition, the eddy current damper is a process of continuous heating during operation, and directly treating the high-temperature vibration signal as an abnormal signal without considering environmental factors will affect the accuracy of subsequent fault detection. Summary of the invention
[0004] The present invention provides an eddy current damper fault detection method and system, which are used to solve the technical problem that inaccurate fault signal extraction leads to low subsequent fault detection accuracy.
[0005] In a first aspect, the present invention provides a method for detecting faults of an eddy current damper, comprising:
[0006] Acquire at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence;
[0007] Determining whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal;
[0008] If the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, determining whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal;
[0009] If the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the third vibration signal is defined as a target vibration signal, and the similarity between the second vibration signal and a fourth vibration signal is further determined to be greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal;
[0010] The at least one target vibration signal is input into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0011] In a second aspect, the present invention provides an eddy current damper fault detection system, comprising:
[0012] A sorting module, configured to obtain at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence;
[0013] a first judging module, configured to judge whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal;
[0014] a second judgment module, configured to judge whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold if the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal;
[0015] a third judgment module, configured to define the third vibration signal as a target vibration signal if the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, and continue to judge whether the similarity between the second vibration signal and a fourth vibration signal is greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal;
[0016] The output module is configured to input the at least one target vibration signal into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0017] According to a third aspect, an electronic device is provided, comprising: 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, and the instructions are executed by the at least one processor so that the at least one processor can perform the steps of the eddy current damper fault detection method of any embodiment of the present invention.
[0018] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor is caused to execute the steps of the eddy current damper fault detection method of any embodiment of the present invention.
[0019] The eddy current damper fault detection method and system of the present application compares the vibration signals at various time points. Compared with the method of directly identifying the vibration signals, this method takes into account the phenomenon that the vibration signals at various time points are different due to environmental factors. That is, if the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, it is determined whether the similarity between the second vibration signal and the third vibration signal is greater than the preset threshold. If the similarity between the second vibration signal and the third vibration signal is greater than the preset threshold, the third vibration signal is defined as the target vibration signal, which can effectively improve the accuracy of fault signal determination and facilitate subsequent model identification. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A flow chart of a method for detecting faults of an eddy current damper provided by an embodiment of the present invention;
[0022] Figure 2 A structural block diagram of an eddy current damper fault detection system provided by an embodiment of the present invention;
[0023] Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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.
[0025] See also Figure 1 , which shows a flow chart of an eddy current damper fault detection method of the present application.
[0026] like Figure 1 As shown, the eddy current damper fault detection method specifically includes the following steps:
[0027] Step S101, obtaining at least one vibration signal of the eddy current damper as a whole within a preset time period under preset excitation conditions, and sorting the at least one vibration signal based on time sequence to obtain a vibration signal sequence.
[0028] In this step, at least one vibration signal of the eddy current damper as a whole within a preset time period under preset excitation conditions is obtained, and the at least one vibration signal is subjected to denoising to obtain at least one vibration signal after the noise is removed. The at least one vibration signal after the noise is removed is sorted based on the time sequence to obtain a vibration signal sequence.
[0029] Step S102, determining whether the similarity between the first vibration signal and the second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and the collection time of the second vibration signal is after the collection time of the first vibration signal.
[0030] In this step, the vibration signal includes a temperature signal, a damper vibration frequency signal, and an excitation amplitude signal.
[0031] It should be noted that determining whether the similarity between the first vibration signal and the second vibration signal in the vibration signal sequence is greater than a preset threshold includes:
[0032] Obtain a first difference between the first temperature signal and the second temperature signal, a second difference between the first damper vibration frequency signal and the second damper vibration frequency signal, and a third difference between the first excitation amplitude signal and the second excitation amplitude signal; assign weights to the first difference, the second difference, and the third difference, and sum the weighted first difference, the second difference, and the third difference to obtain a target difference; determine whether the target difference is greater than a preset threshold.
[0033] In a specific embodiment, if the similarity between the first vibration signal and the second vibration signal is greater than a preset threshold, the second vibration signal is directly defined as the target vibration signal, and it is further determined whether the similarity between the first vibration signal and the third vibration signal is greater than the preset threshold.
[0034] Step S103, if the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, determine whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal.
[0035] In a specific embodiment, if the similarity between the second vibration signal and the third vibration signal is not greater than a preset threshold, the process directly continues to determine whether the similarity between the third vibration signal and the fourth vibration signal is greater than a preset threshold.
[0036] Step S104: if the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the third vibration signal is defined as a target vibration signal, and it is further determined whether the similarity between the second vibration signal and a fourth vibration signal is greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal.
[0037] Step S105: inputting the at least one target vibration signal into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0038] In this step, the fault feature recognition model can be obtained based on convolutional neural network training, which specifically includes obtaining the vibration signal and the fault type label corresponding to the vibration signal, and inputting them into the convolutional neural network for iterative training to obtain the fault feature recognition model.
[0039] In summary, the method of the present application, by comparing the vibration signals at various time points, takes into account the phenomenon that the vibration signals at various time points are different due to environmental factors, compared to the method of directly identifying the vibration signals. That is, if the similarity between the first vibration signal and the second vibration signal is not greater than the preset threshold, then it is determined whether the similarity between the second vibration signal and the third vibration signal is greater than the preset threshold; if the similarity between the second vibration signal and the third vibration signal is greater than the preset threshold, then the third vibration signal is defined as the target vibration signal, which can effectively improve the accuracy of fault signal determination and facilitate subsequent model identification.
[0040] See also Figure 2, which shows a structural block diagram of an eddy current damper fault detection system of the present application.
[0041] like Figure 2 As shown, the eddy current damper fault detection system 200 includes a sorting module 210 , a first judgment module 220 , a second judgment module 230 , a third judgment module 240 and an output module 250 .
[0042] Among them, the sorting module 210 is configured to obtain at least one vibration signal of the eddy current damper as a whole within a preset time period under preset excitation conditions, and sort the at least one vibration signal based on the time sequence to obtain a vibration signal sequence; the first judgment module 220 is configured to judge whether the similarity between the first vibration signal and the second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and the collection time of the second vibration signal is after the collection time of the first vibration signal; the second judgment module 230 is configured to judge whether the similarity between the second vibration signal and the third vibration signal is greater than if the similarity between the first vibration signal and the second vibration signal is not greater than the preset threshold. A preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal; a third judgment module 240, configured to define the third vibration signal as a target vibration signal if the similarity between the second vibration signal and the third vibration signal is greater than the preset threshold, and continue to judge whether the similarity between the second vibration signal and the fourth vibration signal is greater than the preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal; an output module 250, configured to input the at least one target vibration signal into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0043] It should be understood that Figure 2 Modules and references documented in Figure 1 Therefore, the operations and features described above for the method and the corresponding technical effects are also applicable to Figure 2 The modules in it will not be described in detail here.
[0044] In some other embodiments, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor is caused to execute the eddy current damper fault detection method in any of the above method embodiments;
[0045] As an implementation mode, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are configured as follows:
[0046] Acquire at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence;
[0047] Determining whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal;
[0048] If the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, determining whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal;
[0049] If the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the third vibration signal is defined as a target vibration signal, and the similarity between the second vibration signal and a fourth vibration signal is further determined to be greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal;
[0050] The at least one target vibration signal is input into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0051] The computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the eddy current damper fault detection system, etc. In addition, the computer-readable storage medium may include a high-speed random access memory, and may also include a memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the eddy current damper fault detection system via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
[0052] Figure 3 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, such as Figure 3As shown, the device includes: a processor 310 and a memory 320. The electronic device may also include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330 and the output device 340 may be connected via a bus or other means. Figure 3 In the example, the connection through the bus is taken as an example. The memory 320 is the above-mentioned computer-readable storage medium. The processor 310 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 320, that is, the eddy current damper fault detection method of the above-mentioned method embodiment is realized. The input device 330 can receive input digital or character information, and generate key signal input related to user settings and function control of the eddy current damper fault detection system. The output device 340 may include display devices such as display screens.
[0053] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.
[0054] As an implementation mode, the electronic device is applied to an eddy current damper fault detection system and is used for a client, and includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can:
[0055] Acquire at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence;
[0056] Determining whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal;
[0057] If the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, determining whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal;
[0058] If the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the third vibration signal is defined as a target vibration signal, and the similarity between the second vibration signal and a fourth vibration signal is further determined to be greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal;
[0059] The at least one target vibration signal is input into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
[0060] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.
[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for detecting faults of an eddy current damper, characterized in that: include: Acquire at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence; Determining whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal; If the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, determining whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal; If the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the third vibration signal is defined as a target vibration signal, and the similarity between the second vibration signal and a fourth vibration signal is further determined to be greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal; The at least one target vibration signal is input into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
2. The eddy current damper fault detection method according to claim 1, characterized in that: The vibration signal includes a temperature signal, a damper vibration frequency signal and an excitation amplitude signal; The determining whether the similarity between the first vibration signal and the second vibration signal in the vibration signal sequence is greater than a preset threshold comprises: Acquire a first difference between the first temperature signal and the second temperature signal, a second difference between the first damper vibration frequency signal and the second damper vibration frequency signal, and a third difference between the first excitation amplitude signal and the second excitation amplitude signal; Assigning weights to the first difference, the second difference, and the third difference, and summing the weighted first difference, the second difference, and the third difference to obtain a target difference; Determine whether the target difference is greater than a preset threshold.
3. The eddy current damper fault detection method according to claim 1, characterized in that: After determining whether the similarity between the first vibration signal and the second vibration signal in the vibration signal sequence is greater than a preset threshold, the method further includes: If the similarity between the first vibration signal and the second vibration signal is greater than a preset threshold, the second vibration signal is directly defined as a target vibration signal, and it is further determined whether the similarity between the first vibration signal and the third vibration signal is greater than a preset threshold.
4. The eddy current damper fault detection method according to claim 1, characterized in that: After determining whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, the method further includes: If the similarity between the second vibration signal and the third vibration signal is not greater than the preset threshold, it is directly determined whether the similarity between the third vibration signal and the fourth vibration signal is greater than the preset threshold.
5. The eddy current damper fault detection method according to claim 1, characterized in that: After obtaining at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, the method further includes: The at least one vibration signal is subjected to denoising processing to obtain at least one vibration signal after the noise is removed.
6. An eddy current damper fault detection system, characterized in that: include: A sorting module, configured to obtain at least one vibration signal of the eddy current damper as a whole within a preset time period under a preset excitation condition, and sort the at least one vibration signal based on a time sequence to obtain a vibration signal sequence; a first judging module, configured to judge whether a similarity between a first vibration signal and a second vibration signal in the vibration signal sequence is greater than a preset threshold, wherein the first vibration signal and the second vibration signal are two adjacent vibration signals, and a collection time of the second vibration signal is after a collection time of the first vibration signal; a second judgment module, configured to judge whether the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold if the similarity between the first vibration signal and the second vibration signal is not greater than a preset threshold, wherein the second vibration signal and the third vibration signal are two adjacent vibration signals, and the collection time of the third vibration signal is after the collection time of the second vibration signal; a third judgment module, configured to define the third vibration signal as a target vibration signal if the similarity between the second vibration signal and the third vibration signal is greater than a preset threshold, and continue to judge whether the similarity between the second vibration signal and a fourth vibration signal is greater than a preset threshold, wherein the fourth vibration signal is a vibration signal adjacent to the third vibration signal; The output module is configured to input the at least one target vibration signal into a preset fault feature recognition model, and the fault feature recognition model outputs a fault type corresponding to the preset excitation condition.
7. An electronic device, characterized in that: include: 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, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in any one of claims 1 to 5.
8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.