CN116929757A - Bearing fault diagnosis apparatus, bearing fault diagnosis method, readable storage medium, and electronic apparatus - Google Patents
Bearing fault diagnosis apparatus, bearing fault diagnosis method, readable storage medium, and electronic apparatus Download PDFInfo
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- CN116929757A CN116929757A CN202210329186.XA CN202210329186A CN116929757A CN 116929757 A CN116929757 A CN 116929757A CN 202210329186 A CN202210329186 A CN 202210329186A CN 116929757 A CN116929757 A CN 116929757A
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 title claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 61
- 230000001133 acceleration Effects 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000012774 diagnostic algorithm Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a bearing failure diagnosis apparatus, comprising: a first detection device (100) and a second detection device (200), wherein the first detection device has a vibration acceleration sensor (102), a first clock synchronization module (105) and a first communication module (101), the second detection device has a speed sensor (202), a second clock synchronization module (205) and a second communication module (201), wherein the first communication module (101) and the second communication module (202) are capable of communication, wherein the first clock synchronization (105) and the second clock synchronization (205) have a common switch element (300). The invention further relates to a method for bearing diagnosis, a readable storage medium and an electronic device.
Description
Technical Field
The invention mainly relates to the field of bearing fault diagnosis, in particular to a bearing fault diagnosis method and device, a readable storage medium and electronic equipment, which are used for diagnosing a bearing under the condition that whether a detected bearing runs at a stable and uniform speed can not be accurately known.
Background
Bearings are fundamental components in mechanical devices, and have been widely used in devices such as trains. The running state of the bearing plays a critical role in the running safety of the train, so that diagnosis of the bearing fault is particularly important.
CN111896257a discloses a method and system for diagnosing faults of rolling bearings. The method comprises the steps of collecting signals of the rolling bearing to be detected, carrying out spectrum analysis on the collected signals, and determining fault frequency band signals containing fault characteristics and fault center frequency; band-pass filtering or empirical mode decomposition is carried out on the fault frequency band signals, and fault frequency band time domain signals are obtained; envelope is taken from the time domain signal of the fault frequency segment, and the envelope time is determined; determining an integration time length according to the fault center frequency and the envelope time; integrating the time domain signal of the fault frequency segment based on the integration time length to obtain an integration curve; and carrying out power spectrum analysis on the integral curve, and determining fault points of the rolling bearing to be detected.
Existing bearing fault diagnostic algorithms typically require that the bearing speed be stable and known. In practical detection, the device to be tested is often required to stably operate under constant load or no load so as to ensure the stable speed of the device to be tested within a certain time. The existing method can only obtain stable speed to a certain extent, but the speed often fluctuates or speed information is inaccurate, or the obtained data cannot be known when the speed is stable. This will greatly affect the reliability of bearing failure diagnosis.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a bearing failure diagnosis apparatus that overcomes the above-described drawbacks of the prior art.
The bearing fault diagnosis apparatus according to the invention comprises a first detection device and a second detection device, wherein the first detection device is provided with a vibration acceleration sensor, a first clock synchronization module and a first communication module, the second detection device is provided with a speed sensor, a second clock synchronization module and a second communication module, the first communication module and the second communication module can communicate, and the first clock synchronizer and the second clock synchronizer are provided with a common switch element. The device can measure the speed and the vibration acceleration simultaneously and synchronously record by using the clock synchronization module. The first detection means and the second detection means should be paired before operation and synchronize clocks by wireless communication using a special algorithm. When the first detection means and the second detection means are paired, they may be connected to the same switch element. When the switch piece is pressed down, the first detection device and the second detection device enter an interrupt program at the same time, and the first clock synchronization module and the second clock synchronization module are started and counted at the same time. When sampling is carried out, an absolute time stamp is configured for each data, for example, when the first detection device collects vibration information, speed information sent by the second detection device is received at the same time, the vibration information and the speed information are stored in pairs according to the time stamp of the data, and the vibration information is classified and searched according to the speed information, so that whether a bearing has a fault is judged. Compared with the prior art, the bearing diagnosis device has the technical advantages that the bearing diagnosis device can replace uncertain speed information to obtain clear vibration diagnosis speed information, and the speed information and the vibration information can be stored in pairs through time stamps, so that the device is not required to stably operate under constant load or no load, and the bearing can be monitored in real time.
According to a preferred embodiment of the invention, the first communication module and the second communication module are wireless communication modules, i.e. they can communicate information with each other by means of wireless communication. When the site for measuring vibration cannot be reached, the test can be performed by remote control. When the speed meets the requirements, the test can be initiated remotely.
According to a preferred embodiment of the invention, the first detection device has a first processor module and the second detection device has a second processor module, wherein the first processor module and/or the second processor module has a diagnostic module. For example, a built-in diagnostic module is provided in the first detection device, which can analyze and diagnose bearing faults independently from the vibration and speed data. It is furthermore preferred that the first detection device and/or the second detection device has a control module. For example, the second detection device has a control module, and the second detection device can control the first detection device to start testing through a wireless command.
According to a preferred embodiment of the invention, the first clock synchronizer has a first counter and the second clock synchronizer has a second counter. When the switch piece is pressed down, the first detection device and the second detection device enter an interrupt program at the same time, and the first clock synchronization module and the second clock synchronization module start respective counters at the same time to count, so that the vibration acceleration information and the speed information can be stored synchronously more accurately.
The technical problem is also solved by a method for bearing fault diagnosis. The method comprises the steps of:
-acquiring a vibration acceleration signal of the bearing in operation;
-acquiring a speed signal of the bearing in operation;
-storing said vibration acceleration signal and said velocity signal in pairs simultaneously by means of time stamps;
-looking for a speed signal of a steady period, determining a vibration acceleration signal of the respective period from said time stamp;
-obtaining a fault diagnosis of the bearing from the vibration acceleration signal of the respective period.
According to the method, the speed information and the vibration acceleration information can be stored in pairs through the time stamp, so that the equipment is not required to stably run under constant load or no load, and the bearing can be monitored in real time. And acquiring corresponding vibration acceleration information according to the speed information of the stable period by utilizing the correspondence of the speed information and the vibration acceleration information, and further acquiring a fault diagnosis result of the bearing.
It is further preferred that the method further comprises the step of: and determining a detection interval and feeding back the fault diagnosis result in real time. According to different bearings and different requirements in actual production, a predetermined detection interval is set, and speed information and vibration acceleration information of a stable period in the detection interval are analyzed, so that a fault diagnosis result of the bearings is obtained. It is further preferable that if there are a plurality of stable periods within the detection interval, the vibration acceleration signal having the same time stamp as each stable period is calculated, and then the failure diagnosis result is calculated with a certain weight, thereby obtaining a more accurate diagnosis result.
The invention further relates to a computer readable storage medium having stored thereon computer instructions which, when run, perform the steps of the above bearing failure diagnosis method. In addition, the invention also relates to an electronic device which comprises a memory and a processor, wherein the memory stores computer instructions which can be run on the processor, and the processor executes the steps of the bearing fault diagnosis method when the processor runs the computer instructions.
Drawings
The invention is further described below with reference to the accompanying drawings. The same reference numbers are used in the figures to denote identical or functionally identical elements. The attached drawings are as follows:
fig. 1 shows a block diagram of a bearing failure diagnosis apparatus according to the present invention;
fig. 2 shows a schematic diagram of the operation of a clock synchronization module of the detection device according to the invention;
fig. 3 shows graphs of two speed detection results.
Detailed Description
Specific embodiments of a bearing failure diagnosis apparatus according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and the accompanying drawings are provided to illustrate the principles of the invention and not to limit the invention to the preferred embodiments described, the scope of which is defined by the claims.
Fig. 1 shows a block diagram of an apparatus capable of measuring both vibration information and speed information of a bearing under test according to the present invention. The apparatus has a first detection device 100 and a second detection device 200, as shown in fig. 1.
The first detection device 100 is designed for measuring the vibration acceleration. The first detection device 100 has a vibration acceleration sensor 102, and for example, the vibration acceleration sensor 102 can be mounted on a bearing surface to be measured. The first detection device 100 further has a first communication module 101, which is wirelessly connected to the second communication module 201 of the second detection device 200, and can receive the speed information transmitted by the second communication module 201. The first detection device 100 also has a first information acquisition module 103 that acquires information from the vibration acceleration sensor 102 and transmits the information to the first processor module 104. Within the first processor module 104 is a built-in diagnostic algorithm that can independently analyze and diagnose bearing failure based on vibration and velocity data. In addition, the first detection device 100 further has a first display module 108, a first decoding module 106, and a first input module 107.
The second detection device 200 is designed for detecting a speed and has a speed sensor 202. The second detecting device 200 includes a second communication module 201, a second information acquisition module 203, a second processor module 204, a second decoding module 206, a second input module 207, and a second display module 208, which have similar functions to the first detecting device 100. In addition, the second detecting device 200 further has a transmission control module 209, and a command can be transmitted to the first detecting device 100 by using the transmission control module 209, so that the first detecting device 100 can be controlled to start a test using the second detecting device 200.
The first detecting device 100 and the second detecting device 200 have a first clock synchronization module 105 and a second clock synchronization module 205, respectively. The first detecting device 100 and the second detecting device 200 should be paired before operation and synchronize clocks through wireless communication using a special algorithm, see fig. 2. When the first detecting device 100 and the second detecting device 200 are paired, they have one IO interface connected to the same switching device 300. When the switch 300 is pressed, the first detecting device 100 and the second detecting device 200 enter the interrupt program simultaneously, and the first clock synchronization module 105 and the second clock synchronization module 205 start the high-precision crystal oscillators 150, 250 to count simultaneously. At the time of sampling, the data information is bound to the value of the current counter 150, 250 so that each data has an absolute time stamp. When the first information acquisition module 103 acquires vibration information, the speed information transmitted by the second detection device 200 is received, the vibration information and the speed information are stored in pairs according to the time stamp of the data, and the vibration information is classified and searched according to the speed information, so that whether the bearing has a fault is judged.
Fig. 3 shows two speed detection results. The upper half of fig. 3 shows the first speed detection result in which the speed of the bearing is not stable. The detection values may be divided into several groups according to a certain ratio, for example, three groups as shown in the upper half of fig. 3. The speed is relatively stable over the three groups of time. And calculating vibration analysis results with the same time stamp as each group of speed detection values, and obtaining final calculation results according to certain weight. The second detection result is shown in the lower part of fig. 3, in which a relatively smooth movement section that is most satisfactory is found in the second speed detection result, and the vibration condition is analyzed using the smooth speed data. The diagnosis result can be obtained by the two methods, and the two analyses can be combined according to a certain weight and the actual vibration condition.
While possible embodiments are exemplarily described in the above description, it should be understood that there are numerous variations of the embodiments still through all known and furthermore easily conceivable combinations of technical features and embodiments by the skilled person. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. The technical teaching for converting at least one exemplary embodiment is provided more in the foregoing description to the skilled person, wherein various changes may be made without departing from the scope of the claims, in particular with regard to the function and structure of the components.
List of reference numerals
100. First detection device
101. First communication module
102. Vibration acceleration sensor
103. First information acquisition module
104. First processor module
105. First clock synchronization module
106. First decoding module
107. First input module
108. First display module
150. First counter
200. Second detection device
201. Second communication module
202. Speed sensor
203. Second information acquisition module
204. Second processor module
205. Second clock synchronization module
206. A second decoding module
207. Second input module
208. Second display module
209. Transmission control module
250. Second counter
300. Switch piece
Claims (10)
1. A bearing failure diagnosis apparatus, comprising: first detection device (100) and second detection device (200), wherein, first detection device (100) has vibration acceleration sensor (102), first clock synchronization module (105) and first communication module (101), second detection device (200) has speed sensor (202), second clock synchronization module (205) and second communication module (201), wherein, first communication module (101) and second communication module (202) can communicate, wherein, first clock synchronization (105) and second clock synchronization (205) have common switch piece (300).
2. The bearing failure diagnosis apparatus as claimed in claim 1, wherein the first communication module (101) and the second communication module (201) are wireless communication modules.
3. Bearing failure diagnosis apparatus according to claim 1, characterized in that the first detection device (100) has a first processor module (104), the second detection device (200) has a second processor module (204), wherein the first processor module (104) and/or the second processor module (204) has a diagnostic module.
4. A bearing failure diagnosis apparatus as claimed in claim 3, characterized in that the first detection means (100) and/or the second detection means (200) have a control module.
5. The bearing failure diagnosis apparatus as claimed in claim 1, wherein the first clock synchronizer (105) has a first counter (150), the second clock synchronizer (205) has a second counter (250), and the first counter (150) and the second counter (250) are connected to the switching member (300).
6. A method for bearing fault diagnosis, the method comprising the steps of:
-acquiring a vibration acceleration signal of the bearing in operation;
-acquiring a speed signal of the bearing in operation;
-storing said vibration acceleration signal and said velocity signal in pairs simultaneously by means of time stamps;
-looking for a speed signal of a steady period, determining a vibration acceleration signal of the respective period from said time stamp;
-obtaining a fault diagnosis of the bearing from the vibration acceleration signal of the respective period.
7. The method according to claim 6, characterized in that the method further comprises the step of: and determining a detection interval and feeding back the fault diagnosis result in real time.
8. The method according to claim 7, wherein if there are a plurality of the stable periods within the detection interval, a vibration acceleration signal having the same time stamp as each stable period is calculated, and then the failure diagnosis result is calculated with a weight.
9. A computer readable storage medium having stored thereon computer instructions, which when run perform the steps of the bearing fault diagnosis method of claims 6 to 8.
10. An electronic device comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, the processor executing the steps of the bearing fault diagnosis method of claims 6 to 8 when the computer instructions are executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210329186.XA CN116929757A (en) | 2022-03-30 | 2022-03-30 | Bearing fault diagnosis apparatus, bearing fault diagnosis method, readable storage medium, and electronic apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210329186.XA CN116929757A (en) | 2022-03-30 | 2022-03-30 | Bearing fault diagnosis apparatus, bearing fault diagnosis method, readable storage medium, and electronic apparatus |
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| CN116929757A true CN116929757A (en) | 2023-10-24 |
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| CN202210329186.XA Pending CN116929757A (en) | 2022-03-30 | 2022-03-30 | Bearing fault diagnosis apparatus, bearing fault diagnosis method, readable storage medium, and electronic apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117326435A (en) * | 2023-11-30 | 2024-01-02 | 中国特种设备检测研究院 | Staircase fault diagnosis method and diagnosis system |
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2022
- 2022-03-30 CN CN202210329186.XA patent/CN116929757A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117326435A (en) * | 2023-11-30 | 2024-01-02 | 中国特种设备检测研究院 | Staircase fault diagnosis method and diagnosis system |
| CN117326435B (en) * | 2023-11-30 | 2024-03-22 | 中国特种设备检测研究院 | Staircase fault diagnosis method and diagnosis system |
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