A method, apparatus, device and storage medium for vibration test analysis
By collecting and analyzing the vibration signals of the refrigeration system, and combining time-domain, frequency-domain, and order-domain analysis, it is possible to accurately determine whether the vibration contribution of the refrigeration system comes from resonance. This solves the shortcomings of traditional simulation methods, provides a basis for structural optimization, and improves testing efficiency and imaging quality.
Patent Information
- Application Number
- CN202211312141.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-25
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2042-10-25
AI Technical Summary
The internal structure of the refrigeration system is complex, and it is difficult to obtain an accurate frequency band range through traditional simulation methods. This makes it difficult to effectively test whether the vibration contribution comes from resonance, which affects the imaging quality of the infrared detector and the stability of the equipment.
The first, second, and third vibration signals of the refrigeration system were collected, and time-domain and frequency-domain analyses were performed. Combined with order analysis, it was determined whether the vibration contribution came from resonance, and the source of vibration was determined by difference calculation.
Accurately determining the vibration magnitude and resonant frequency of the refrigeration system provides a basis for structural optimization, improves testing efficiency, and reduces testing difficulty and time.
Smart Images
Figure CN115655456B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vibration testing technology, specifically to a method, apparatus, equipment, and storage medium for vibration testing and analysis. Background Technology
[0002] A refrigerating machine is a machine that transfers heat from a cooled object to the surrounding environment to obtain cooling. The refrigerating machine system used in infrared detectors has certain requirements regarding its vibration output. Excessive vibration transmitted to the focal plane can lead to blurred or non-existent imaging, reducing the resolution and positioning accuracy of the infrared detector, and even causing mechanical resonance in other equipment and structures. Therefore, it is necessary to test and analyze the vibration contribution of the refrigerating machine system to provide a basis for subsequent structural optimization.
[0003] However, the internal structure of the refrigeration system is complex, and it is difficult to obtain an accurate frequency band range through traditional simulation methods. Therefore, it is not possible to effectively test whether the vibration contribution of the refrigeration system comes from resonance. Summary of the Invention
[0004] In view of this, this application provides a method, apparatus, device and storage medium for vibration testing and analysis, which solves the problem that because the internal structure of the refrigeration system is complex, it is difficult to obtain an accurate frequency band range through traditional simulation methods, and therefore it is not possible to effectively test whether the vibration contribution of the refrigeration system comes from resonance.
[0005] To achieve the above objectives, the following solution is proposed:
[0006] Firstly, a method for vibration testing and analysis includes:
[0007] The first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system were collected in advance;
[0008] Time-domain analysis was performed on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal;
[0009] If the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it, then it is determined that the vibration of the refrigeration system exceeds the standard. Frequency domain analysis is performed on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0010] Order analysis of the second vibration signal yields the resonant frequency band of the refrigeration system.
[0011] Based on the first frequency band, the third frequency band, and the resonant frequency band, determine whether the vibration contribution of the refrigeration system comes from resonance.
[0012] Preferably, the step of performing order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system includes:
[0013] By performing order analysis on the second vibration signal, the vibration values and frequency characteristics of the refrigeration system at each preset speed are obtained.
[0014] Based on the preset rotation speed, vibration value and frequency characteristics, a three-dimensional spectrum corresponding to the second vibration signal is obtained.
[0015] The resonant frequency band of the refrigeration system is determined from the three-dimensional spectrum.
[0016] Preferably, determining whether the vibration contribution of the refrigerator system originates from resonance based on the first frequency band, the third frequency band, and the resonant frequency band includes:
[0017] The difference between the first frequency band and the resonant frequency band is calculated to obtain the first difference value corresponding to the first frequency band.
[0018] The difference between the third frequency band and the resonant frequency band is calculated to obtain the third difference value corresponding to the third frequency band.
[0019] If the first difference or the third difference is less than the second preset threshold, then it is determined that the vibration contribution of the refrigeration system comes from resonance.
[0020] Preferably, the acquisition of the pre-acquired first vibration signal, second vibration signal, and third vibration signal of the refrigeration system includes:
[0021] The pre-acquired refrigeration system was operated at the first speed, the second speed, and the third speed, respectively;
[0022] The system acquires a first analog signal when the refrigeration system operates at the first speed, a second analog signal when it operates at the second speed, and a third analog signal when it operates at the third speed.
[0023] The first analog signal, the second analog signal, and the third analog signal are respectively converted from analog to digital to obtain the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system.
[0024] Preferably, it further includes:
[0025] If both the first difference and the third difference are not less than the second preset threshold, then it is determined that the vibration contribution of the refrigeration system does not come from resonance.
[0026] Secondly, a vibration testing and analysis apparatus includes:
[0027] The acquisition module is used to acquire the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system that have been acquired in advance;
[0028] The time-domain analysis module is used to perform time-domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal;
[0029] The frequency domain analysis module is used to determine that the vibration of the refrigeration system exceeds the standard if the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it. The module performs frequency domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0030] The resonant frequency band acquisition module is used to perform order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system.
[0031] The vibration contribution determination module is used to determine whether the vibration contribution of the refrigeration system comes from resonance based on the first frequency band, the third frequency band, and the resonant frequency band.
[0032] Preferably, the resonant frequency band obtaining module includes:
[0033] The order analysis module is used to perform order analysis on the second vibration signal to obtain the vibration values and frequency characteristics of the refrigeration system at each preset speed.
[0034] The three-dimensional spectrum module is used to obtain a three-dimensional spectrum corresponding to the second vibration signal based on each of the preset rotational speeds, vibration values, and frequency characteristics.
[0035] A determination module is used to determine the resonant frequency band of the refrigeration system from the three-dimensional spectrum.
[0036] Preferably, the vibration contribution determination module includes:
[0037] The first difference calculation module is used to calculate the difference between the first frequency band and the resonant frequency band to obtain a first difference corresponding to the first frequency band.
[0038] The third difference calculation module is used to calculate the difference between the third frequency band and the resonant frequency band to obtain the third difference corresponding to the third frequency band.
[0039] The resonance determination module is used to determine that the vibration contribution of the refrigeration system comes from resonance if the first difference or the third difference is less than a second preset threshold.
[0040] Thirdly, a vibration testing and analysis device, including a memory and a processor;
[0041] The memory is used to store programs;
[0042] The processor is configured to execute the program to implement the various steps of the vibration test analysis method as described in the first aspect.
[0043] Fourthly, a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the vibration test analysis method as described in the first aspect.
[0044] As can be seen from the above technical solution, this application collects a first vibration signal, a second vibration signal, and a third vibration signal from the refrigeration system; performs time-domain analysis on the first and third vibration signals to obtain a first vibration acceleration and a third vibration acceleration; if the first vibration acceleration is greater than a first preset threshold, or the third vibration acceleration is greater than a third preset threshold, it is determined that the vibration of the refrigeration system exceeds the standard; performs frequency-domain analysis on the first and third vibration signals to obtain a first frequency band and a third frequency band of the refrigeration system vibration; performs order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system; and, based on the first frequency band, the third frequency band, and the resonant frequency band, determines whether the vibration contribution of the refrigeration system comes from resonance. This solution can accurately determine the vibration magnitude and resonant frequency of the refrigeration system, providing a basis for subsequent structural optimization of the refrigeration system. Attached Figure Description
[0045] 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0046] Figure 1 An optional flowchart of a vibration testing and analysis method provided in an embodiment of this application;
[0047] Figure 2A system structure diagram for vibration testing and analysis provided in this application embodiment;
[0048] Figure 3 A schematic diagram illustrating the relationship between the rotational speed of the refrigeration system and various vibration signals provided in this application embodiment;
[0049] Figure 4 A schematic diagram of a vibration testing and analysis device provided in an embodiment of this application;
[0050] Figure 5 This is a schematic diagram of the structure of a vibration testing and analysis device provided in an embodiment of this application.
[0051] In the diagram: 1. Silencer box; 2. Microphone; 3. Triaxial vibration acceleration sensor; 4. Sponge pad; 5. Refrigeration system; 6. Signal acquisition system; 7. Data analysis system. Detailed Implementation
[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0053] A refrigerating machine is a machine that transfers heat from a cooled object to the surrounding environment to obtain cooling. The refrigerating machine system used in infrared detectors has certain requirements regarding its vibration output. Excessive vibration, transmitted to the focal plane, can cause blurred or non-existent imaging, leading to a decrease in the resolution and positioning accuracy of the infrared detector, and even causing mechanical resonance in other equipment and structures. Therefore, it is necessary to test and analyze the vibration contribution of the refrigerating machine system to provide a basis for subsequent structural optimization. However, the internal structure of a refrigerating machine system is complex, and it is difficult to obtain an accurate frequency band range through traditional simulation methods. Therefore, it is not effective to test whether the vibration contribution of the refrigerating machine system originates from resonance.
[0054] To address the aforementioned shortcomings, this invention provides a vibration testing and analysis method. This method can be applied to various computer terminals or smart terminals, and its execution entity can be the processor or server of the computer terminal or smart terminal. The method flowchart is shown below. Figure 1 As shown, it specifically includes:
[0055] S1: Collect the first vibration signal, second vibration signal and third vibration signal of the refrigeration system obtained in advance.
[0056] The refrigeration system in this application can be a rotary Stirling refrigeration unit. Preferably, the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system can be acquired using a signal acquisition instrument or a signal acquisition system.
[0057] In one example, during the acquisition of the first, second, and third vibration signals of the refrigeration system using a signal acquisition instrument or system, noise signals generated by the refrigeration system during full-speed operation, frequency reduction, and stabilization can also be acquired simultaneously. Specifically:
[0058] Collect the first and third noise signals of the refrigeration system.
[0059] Octave band analysis was performed on the first noise signal and the third noise signal respectively to obtain the first octave band spectrum corresponding to the first noise signal and the third octave band spectrum corresponding to the third noise signal.
[0060] The first total sound pressure level corresponding to the first noise signal is obtained from the first octave band spectrum, and the third total sound pressure level corresponding to the third noise signal is obtained from the third octave band spectrum.
[0061] It is understood that the total sound pressure level is the noise value. In this application, octave band analysis can be performed on the original time-domain noise signal of the refrigeration system during full-speed operation to obtain the first octave band spectrum corresponding to the first vibration signal; octave band analysis can also be performed on the original time-domain noise signal of the refrigeration system during steady-state operation to obtain the third octave band spectrum corresponding to the third vibration signal. Both the first and third octave band spectra can be 1 / 3 octave band spectra. These two spectra can be used to obtain the noise values of the refrigeration system during full-speed operation and steady-state operation, respectively. Figure 2As shown, the refrigeration system 5 is placed on the sponge pad 4 in the lower right corner of the silencer box 1. The silencer box is used to reduce external noise. The dimensions of the silencer box 1 can be set to 0.8m*0.8m*0.8m. Then, two microphones 2 are placed in the upper left corner of the silencer box 1, with a straight-line distance of 1m between the microphones 2 and the refrigeration system 5. In addition, three-dimensional vibration acceleration sensors 3 are placed at the compression end, expansion cylinder, and motor housing of the refrigeration system 5. Then, the microphones 2 and acceleration sensors 3 are connected to the signal acquisition system 6. The speed signal line of the refrigeration system 5 is connected to the speed channel of the signal acquisition system 6. The sampling frequency was set to 12800 Hz. The refrigerator was turned on and the refrigerator system 5 was first run at full speed of 3200 rpm. When the refrigerator reached a preset temperature, it gradually reduced the frequency to a stable speed of about 1500 rpm. The above process can be roughly divided into three processes: full speed operation process t1, frequency reduction process t2, and stabilization process t3. After 1 minute of reaching a stable speed of 1500 rpm, the rotation of the refrigerator system 5 was stopped. During the rotation of the refrigerator system 5, the signal acquisition system 6 was used to collect the signals of the three processes of the refrigerator system 5, and the first vibration signal of the full speed operation process, the second vibration signal of the frequency reduction process, and the third vibration signal of the stabilization process were obtained.
[0062] S2: Perform time-domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal.
[0063] In this application, the first vibration signal and the third vibration signal can be the original time-domain vibration signal generated by the refrigeration system during full-speed operation and the original time-domain vibration signal during the steady-state process. Therefore, time-domain analysis can be performed on the original time-domain vibration signal of the refrigeration system during full-speed operation to obtain the effective value of vibration acceleration during full-speed operation, i.e., the first vibration acceleration corresponding to the first vibration signal. At the same time, time-domain analysis can be performed on the original time-domain vibration signal of the refrigeration system during the steady-state process to obtain the effective value of vibration acceleration during the steady-state process, i.e., the third vibration acceleration corresponding to the third vibration signal.
[0064] S3: If the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it, then the vibration of the refrigeration system is determined to be excessive. Frequency domain analysis is performed on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0065] Specifically, there are three scenarios: If the first vibration acceleration is greater than its corresponding first preset threshold, and the third vibration acceleration is not greater than its corresponding third preset threshold, then the refrigeration system's vibration exceeds the standard during full-speed operation, thus confirming that the refrigeration system's vibration exceeds the standard; if the first vibration acceleration is not greater than its corresponding first preset threshold, and the third vibration acceleration is greater than its corresponding third preset threshold, then the refrigeration system's vibration exceeds the standard during the stable operation phase, thus confirming that the refrigeration system's vibration exceeds the standard; if the first vibration acceleration is greater than its corresponding first preset threshold, and the third vibration acceleration is greater than its corresponding third preset threshold, then the refrigeration system's vibration exceeds the standard during both full-speed operation and the stable operation phase, thus further confirming that the refrigeration system's vibration exceeds the standard. The first and third preset thresholds can be determined based on the specific parameters of the refrigeration system, and this embodiment does not impose any restrictions on them.
[0066] Specifically, such as Figure 3 As shown, by using the data analysis system 7 or the server to perform frequency domain analysis on them respectively, the main frequency points or frequency bands contributing to the vibration during full-speed operation can be obtained, namely the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal.
[0067] S4: Perform order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system.
[0068] The order of rotating machinery mainly refers to the number of times the target time occurs per revolution of a rotating component. As a rotating component, it will produce a response of a certain amplitude, such as vibration or noise. This response will also change with the rotational speed. Therefore, by performing order analysis on the second vibration signal, the resonant frequency band of the refrigeration system can be obtained.
[0069] S5: Based on the first frequency band, the third frequency band, and the resonant frequency band, determine whether the vibration contribution of the refrigeration system comes from resonance.
[0070] It can be determined whether the first and third frequency bands are both located near the resonant frequency band. If so, the vibration contribution of the refrigeration system can be considered as system resonance; otherwise, the vibration contribution of the refrigeration system is not considered as system resonance. It is understood that the vibration contribution in this application is the main contribution causing the vibration of the refrigeration system.
[0071] As can be seen from the above technical solution, this application collects a first vibration signal, a second vibration signal, and a third vibration signal from the refrigeration system; performs time-domain analysis on the first and third vibration signals to obtain a first vibration acceleration and a third vibration acceleration; if the first vibration acceleration is greater than a first preset threshold, or the third vibration acceleration is greater than a third preset threshold, it is determined that the vibration of the refrigeration system exceeds the standard; performs frequency-domain analysis on the first and third vibration signals to obtain a first frequency band and a third frequency band of the refrigeration system vibration; performs order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system; and, based on the first frequency band, the third frequency band, and the resonant frequency band, determines whether the vibration contribution of the refrigeration system comes from resonance. This solution can accurately determine the vibration magnitude and resonant frequency of the refrigeration system, providing a basis for subsequent structural optimization of the refrigeration system.
[0072] The method provided in this embodiment of the invention involves performing order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system, which is specifically described below:
[0073] S31: Perform order analysis on the second vibration signal to obtain the vibration values and frequency characteristics of the refrigeration system at each preset speed.
[0074] S32: Based on each of the preset rotation speeds, vibration values, and frequency characteristics, a three-dimensional spectrum corresponding to the second vibration signal is obtained.
[0075] S33: Determine the resonant frequency band of the refrigeration system from the three-dimensional spectrum.
[0076] Specifically, by performing order analysis on the second vibration signal, the vibration values and frequencies of the refrigeration system at each preset rotational speed can be obtained. Based on each preset rotational speed, vibration value, and frequency, a three-dimensional vibration-rotational-frequency spectrum can be established with frequency as the horizontal axis and rotational speed as the vertical axis. In the three-dimensional spectrum, the intensity of the spectrum color represents the magnitude of the vibration, and the frequency range where the bright band perpendicular to the frequency axis is located is taken as the resonant frequency point or resonant frequency band.
[0077] The above embodiments illustrate the process of performing order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system in this application. The following describes in detail the process of determining whether the vibration contribution of the refrigeration system comes from resonance based on the first frequency band, the third frequency band, and the resonant frequency band.
[0078] S41: Calculate the difference between the first frequency band and the resonant frequency band to obtain a first difference corresponding to the first frequency band.
[0079] S42: Calculate the difference between the third frequency band and the resonant frequency band to obtain the third difference value corresponding to the third frequency band.
[0080] S43: If the first difference or the third difference is less than the second preset threshold, then it is determined that the vibration contribution of the refrigeration system comes from resonance.
[0081] S44: If both the first difference and the third difference are not less than the second preset threshold, then the vibration contribution of the refrigeration system does not come from resonance.
[0082] It is understandable that if the first difference is less than the second preset threshold, then the vibration contribution of the refrigeration system during full-speed operation is determined to be from resonance; if the third difference is less than the second preset threshold, then the vibration contribution of the refrigeration system during the steady-state process is determined to be from resonance; if both the first and third differences are less than the second preset threshold, then the vibration contribution of the refrigeration system during both full-speed operation and the steady-state process is determined to be from resonance.
[0083] The above embodiments illustrate the process of determining whether the vibration contribution of the refrigeration system comes from resonance based on the first frequency band, the third frequency band, and the resonant frequency band in this application. The process of acquiring the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system in advance in this application will be described in detail below.
[0084] The pre-acquired refrigeration system is operated at a first speed, a second speed, and a third speed. A first analog signal is acquired when the refrigeration system operates at the first speed, a second analog signal is acquired when it operates at the second speed, and a third analog signal is acquired when it operates at the third speed. Analog-to-digital conversion is performed on the first, second, and third analog signals respectively to obtain digital signals of the refrigeration system, including a first vibration signal, a second vibration signal, and a third vibration signal. The relationship between the rotational speed of the refrigeration system and each vibration signal can be as follows: Figure 3 As shown, the Figure 3 It can also characterize the time-domain signal of the refrigeration system during the full-speed operation process t1, the frequency reduction process t2, and the steady-state process t3.
[0085] In the above-described scheme, this application combines vibration testing and analysis with order analysis of the refrigeration system, which can greatly improve the efficiency of vibration testing and analysis of the refrigeration system. Furthermore, using order analysis to assist vibration testing and analysis can effectively reduce the difficulty of the experiment, shorten the test time, and quickly and effectively identify the resonant frequency band of the refrigeration system.
[0086] and Figure 1Corresponding to the method described above, embodiments of the present invention also provide a device for vibration testing and analysis, used for... Figure 1 The specific implementation of the method, the vibration testing and analysis device provided in this embodiment of the invention, can be used in a computer terminal or various mobile devices, combined with... Figure 4 The equipment for vibration testing and analysis is introduced, such as... Figure 4 As shown, the device may include:
[0087] The acquisition module 10 is used to acquire the first vibration signal, the second vibration signal and the third vibration signal of the refrigeration system that have been acquired in advance;
[0088] Time-domain analysis module 20 is used to perform time-domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal;
[0089] The frequency domain analysis module 30 is used to determine that the vibration of the refrigeration system exceeds the standard if the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it. The module performs frequency domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0090] The resonant frequency band acquisition module 40 is used to perform order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system.
[0091] The vibration contribution determination module 50 is used to determine whether the vibration contribution of the refrigeration system comes from resonance based on the first frequency band, the third frequency band, and the resonant frequency band.
[0092] As can be seen from the above technical solution, this application collects a first vibration signal, a second vibration signal, and a third vibration signal from the refrigeration system; performs time-domain analysis on the first and third vibration signals to obtain a first vibration acceleration and a third vibration acceleration; if the first vibration acceleration is greater than a first preset threshold, or the third vibration acceleration is greater than a third preset threshold, it is determined that the vibration of the refrigeration system exceeds the standard; performs frequency-domain analysis on the first and third vibration signals to obtain a first frequency band and a third frequency band of the refrigeration system vibration; performs order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system; and, based on the first frequency band, the third frequency band, and the resonant frequency band, determines whether the vibration contribution of the refrigeration system comes from resonance. This solution can accurately determine the vibration magnitude and resonant frequency of the refrigeration system, providing a basis for subsequent structural optimization of the refrigeration system.
[0093] In one example, the resonant frequency band obtaining module 40 may include:
[0094] The order analysis module is used to perform order analysis on the second vibration signal to obtain the vibration values and frequency characteristics of the refrigeration system at each preset speed.
[0095] The three-dimensional spectrum module is used to obtain a three-dimensional spectrum corresponding to the second vibration signal based on each of the preset rotational speeds, vibration values, and frequency characteristics.
[0096] A determination module is used to determine the resonant frequency band of the refrigeration system from the three-dimensional spectrum.
[0097] In one example, the vibration contribution determination module 50 includes:
[0098] The first difference calculation module is used to calculate the difference between the first frequency band and the resonant frequency band to obtain a first difference corresponding to the first frequency band.
[0099] The third difference calculation module is used to calculate the difference between the third frequency band and the resonant frequency band to obtain the third difference corresponding to the third frequency band.
[0100] The resonance determination module is used to determine that the vibration contribution of the refrigeration system comes from resonance if the first difference or the third difference is less than a second preset threshold.
[0101] In one example, the acquisition module 10 may include:
[0102] The working module is used to operate the pre-acquired refrigeration system at the first speed, the second speed, and the third speed, respectively;
[0103] A separate acquisition module is used to acquire the first analog signal when the refrigeration system operates at the first speed, the second analog signal when it operates at the second speed, and the third analog signal when it operates at the third speed;
[0104] The analog-to-digital conversion module is used to perform analog-to-digital conversion on the first analog signal, the second analog signal, and the third analog signal respectively to obtain the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system.
[0105] In one example, the device may further include:
[0106] The vibration contribution judgment module is used to determine that if both the first difference and the third difference are not less than the second preset threshold, then the vibration contribution of the refrigeration system does not come from resonance.
[0107] Furthermore, embodiments of this application provide a device for vibration testing and analysis. Optionally, Figure 5 The hardware structure block diagram of the vibration testing and analysis equipment is shown, with reference to... Figure 5 The hardware structure of the vibration test and analysis equipment may include: at least one processor 01, at least one communication interface 02, at least one memory 03, and at least one communication bus 04.
[0108] In this embodiment, the number of processor 01, communication interface 02, memory 03 and communication bus 04 is at least one, and processor 01, communication interface 02 and memory 03 communicate with each other through communication bus 04.
[0109] Processor 01 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
[0110] Memory 03 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device.
[0111] The memory stores a program, which the processor can call to execute. The program is used to perform the following vibration test analysis methods, including:
[0112] The first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system were collected in advance;
[0113] Time-domain analysis was performed on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal;
[0114] If the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it, then it is determined that the vibration of the refrigeration system exceeds the standard. Frequency domain analysis is performed on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0115] Order analysis of the second vibration signal yields the resonant frequency band of the refrigeration system.
[0116] Based on the first frequency band, the third frequency band, and the resonant frequency band, determine whether the vibration contribution of the refrigeration system comes from resonance.
[0117] Optionally, the refinement and extension functions of the program can be found in the description of the vibration test analysis method in the method embodiments.
[0118] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor. When the program runs, it controls the device containing the storage medium to perform the following vibration test analysis, including:
[0119] The first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system were collected in advance;
[0120] Time-domain analysis was performed on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal;
[0121] If the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it, then it is determined that the vibration of the refrigeration system exceeds the standard. Frequency domain analysis is performed on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system.
[0122] Order analysis of the second vibration signal yields the resonant frequency band of the refrigeration system.
[0123] Based on the first frequency band, the third frequency band, and the resonant frequency band, determine whether the vibration contribution of the refrigeration system comes from resonance.
[0124] Specifically, the storage medium can be a computer-readable storage medium, which can be an electronic storage device such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM.
[0125] Optionally, the refinement and extension functions of the program can be found in the description of the vibration test analysis method in the method embodiments.
[0126] Furthermore, the functional modules in the various embodiments of this disclosure can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part. If the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a live streaming device, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this disclosure.
[0127] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0128] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0129] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for vibration testing and analysis, characterized in that, include: The first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system were collected in advance; the first vibration signal is the vibration signal generated by the refrigeration system during full-speed operation, the second vibration signal is the vibration signal generated by the refrigeration system during frequency reduction, and the third vibration signal is the vibration signal generated by the refrigeration system during stabilization. Time-domain analysis was performed on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal; If the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it, then it is determined that the vibration of the refrigeration system exceeds the standard. Frequency domain analysis is performed on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system. The process of performing order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system includes: performing order analysis on the second vibration signal to obtain various vibration values and frequency characteristics of the refrigeration system at various preset speeds; obtaining a three-dimensional spectrum corresponding to the second vibration signal based on the various preset speeds, vibration values, and frequency characteristics; and determining the resonant frequency band of the refrigeration system from the three-dimensional spectrum. Based on the first frequency band, the third frequency band, and the resonant frequency band, determining whether the vibration contribution of the refrigeration system originates from resonance includes: calculating the difference between the first frequency band and the resonant frequency band to obtain a first difference corresponding to the first frequency band; calculating the difference between the third frequency band and the resonant frequency band to obtain a third difference corresponding to the third frequency band; if the first difference or the third difference is less than a second preset threshold, then it is determined that the vibration contribution of the refrigeration system originates from resonance.
2. The method according to claim 1, characterized in that, The acquisition of the first vibration signal, second vibration signal, and third vibration signal of the refrigeration system obtained in advance includes: The pre-acquired refrigeration system was operated at the first speed, the second speed, and the third speed, respectively; The system acquires a first analog signal when the refrigeration system operates at the first speed, a second analog signal when it operates at the second speed, and a third analog signal when it operates at the third speed. The first analog signal, the second analog signal, and the third analog signal are respectively converted from analog to digital to obtain the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system.
3. The method according to claim 1, characterized in that, Also includes: If both the first difference and the third difference are not less than the second preset threshold, then it is determined that the vibration contribution of the refrigeration system does not come from resonance.
4. A vibration testing and analysis apparatus, characterized in that, include: The acquisition module is used to acquire the first vibration signal, the second vibration signal, and the third vibration signal of the refrigeration system that have been acquired in advance. The first vibration signal is the vibration signal generated by the refrigeration system during full-speed operation, the second vibration signal is the vibration signal generated by the refrigeration system during frequency reduction, and the third vibration signal is the vibration signal generated by the refrigeration system during stabilization. The time-domain analysis module is used to perform time-domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first vibration acceleration corresponding to the first vibration signal and the third vibration acceleration corresponding to the third vibration signal; The frequency domain analysis module is used to determine that the vibration of the refrigeration system exceeds the standard if the first vibration acceleration is greater than the first preset threshold corresponding to it, or the third vibration acceleration is greater than the third preset threshold corresponding to it. The module performs frequency domain analysis on the first vibration signal and the third vibration signal respectively to obtain the first frequency band corresponding to the first vibration signal and the third frequency band corresponding to the third vibration signal of the refrigeration system. The resonant frequency band acquisition module is used to perform order analysis on the second vibration signal to obtain the resonant frequency band of the refrigeration system; it includes: an order analysis module, used to perform order analysis on the second vibration signal to obtain various vibration values and frequency characteristics of the refrigeration system at various preset speeds; a three-dimensional spectrum module, used to obtain a three-dimensional spectrum corresponding to the second vibration signal based on the various preset speeds, various vibration values, and various frequency characteristics; and a determination module, used to determine the resonant frequency band of the refrigeration system from the three-dimensional spectrum. A vibration contribution determination module is used to determine whether the vibration contribution of the refrigeration system originates from resonance based on the first frequency band, the third frequency band, and the resonant frequency band. This includes: a first difference calculation module, used to calculate the difference between the first frequency band and the resonant frequency band to obtain a first difference corresponding to the first frequency band; a third difference calculation module, used to calculate the difference between the third frequency band and the resonant frequency band to obtain a third difference corresponding to the third frequency band; and a resonance determination module, used to determine that the vibration contribution of the refrigeration system originates from resonance if either the first difference or the third difference is less than a second preset threshold.
5. A vibration testing and analysis device, characterized in that, Including memory and processor; The memory is used to store programs; The processor is configured to execute the program to implement the various steps of the vibration test analysis method as described in any one of claims 1-3.
6. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the various steps of the vibration test and analysis method as described in any one of claims 1-3.
Citation Information
Patent Citations
Refrigerating machine test tool
CN218674156U