CN106932089B - Device and method for detecting faults of vibration monitoring device on line - Google Patents
Device and method for detecting faults of vibration monitoring device on line Download PDFInfo
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- CN106932089B CN106932089B CN201710285574.1A CN201710285574A CN106932089B CN 106932089 B CN106932089 B CN 106932089B CN 201710285574 A CN201710285574 A CN 201710285574A CN 106932089 B CN106932089 B CN 106932089B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The invention discloses a device and a method for detecting faults of a vibration monitoring device on line, which relate to the field of vibration detection and comprise a high-frequency vibrator, wherein the high-frequency vibrator is fixedly connected with the vibration monitoring device through a rigid connecting piece and can vibrate at high frequency, the vibration monitoring device is driven by the rigid connecting piece to vibrate, the vibration frequency of the vibration monitoring device is changed, the reasonable frequency difference between the high-frequency vibrator and an inductor is determined, the inductor in the range is in a normal working state, and if the inductor is not in the range, the inductor is proved to be in fault.
Description
Technical Field
The invention relates to the field of vibration detection, in particular to a device and a method for detecting faults of a vibration monitoring device on line.
Background
The traditional vibration monitoring device mainly comprises a plurality of sensors arranged on the surface of an executing mechanism, the sensors can detect vibration data of the current position in real time, after Fast Fourier Transform (FFT) is carried out on the vibration data, the vibration data of a time domain are transformed to a frequency domain, and the vibration data of the executing mechanism in the operation process can be obtained through analysis of the frequency domain data.
Since the validity of the measured data of the transmission vibration monitoring device completely depends on whether the sensors work normally or not, when one or more sensors work abnormally, the accuracy of the detection result is reduced, in order to avoid the situation, all the sensors are usually detached at intervals and then calibrated by using a special instrument, however, the detection method needs to stop the use of the actuating mechanism in advance, and the detachment and installation of the sensors takes a lot of time, thereby reducing the operating efficiency of the actuating mechanism.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for detecting the faults of a vibration monitoring device on line, which can improve the efficiency of a detection sensor and avoid the reduction of the operating efficiency of an actuating mechanism caused by detection.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
A method for online detection of vibration monitoring device failure, comprising the steps of:
The device for detecting the faults of the vibration monitoring device on line comprises a high-frequency vibrator, a vibration monitoring device and a control device, wherein the high-frequency vibrator is fixedly connected with the vibration monitoring device through a rigid connecting piece and can vibrate at high frequency, the vibration monitoring device is driven to vibrate through the rigid connecting piece, and the vibration frequency of the vibration monitoring device is changed; the vibration monitoring device comprises a plurality of inductors, the inductors are fixed on the actuating mechanism, and the high-frequency vibrator is fixed with the actuating mechanism through a rigid connecting piece;
Acquiring the frequencies of all the inductors in the operation of the executing mechanism, wherein the frequencies are P (1, f), P (2, f), P (3, f) … … P (n, f);
starting a high-frequency vibrator (1) to vibrate according to the frequency of g, and collecting the current frequencies of all inductors: [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ];
Judging whether the frequency difference between the [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ] and g ] exceeds +/-10 Hz, and if so, judging that the corresponding inductor has a fault.
On the basis of the technical scheme, the frequency g is 10-20 times of the vibration frequency of the actuating mechanism.
on the basis of the technical scheme, the range of the frequency difference is +/-5 Hz.
on the basis of the technical scheme, the range of the frequency difference is +/-1 Hz.
Compared with the prior art, the invention has the advantages that:
(1) According to the device for detecting the fault of the vibration monitoring device on line, the high-frequency vibrator drives the inductor to vibrate, the vibration frequency of the inductor is changed, and the vibration frequency of the execution mechanism during operation can be detected, so that the frequency difference between the frequency of the high-frequency vibrator and the frequency of the execution mechanism can be calculated according to the frequency difference, the reasonable frequency difference between the high-frequency vibrator and the inductor is determined according to the frequency difference, the inductor in the range is in a normal working state, and if the frequency difference is not in the range, the inductor is judged to be in a fault.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for online detection of failure of a vibration monitoring apparatus according to an embodiment of the present invention
FIG. 2 is a frequency domain plot of a high frequency vibrator operating at a frequency g and a sensor having a detection signal at the frequency g in an embodiment of the present invention;
Fig. 3 is a frequency domain graph of the high frequency vibrator operating at the frequency g and the sensor having the detection signal at the g' frequency point according to the embodiment of the present invention.
In the figure: 1-high frequency vibrator, 2-vibration monitoring device, 3-inductor, 4-actuator.
Detailed Description
the present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides an apparatus for online detecting a failure of a vibration monitoring device, including a high-frequency vibrator 1, where the high-frequency vibrator 1 is fixedly connected to a vibration monitoring device 2 through a rigid connector, the high-frequency vibrator 1 is capable of performing high-frequency vibration, and the vibration monitoring device 2 is driven by the rigid connector to vibrate to change a vibration frequency of the vibration monitoring device 2.
In practical use, the vibration monitoring device 2 includes a plurality of sensors 3, and the sensors 3 are fixed on the actuator 4, so that the high-frequency vibrator 1 is fixed with the actuator 4 through a rigid connecting member (which can be directly fixed on a rigid structure of the actuator 4), and when the high-frequency vibrator 1 vibrates, the sensors 3 are also driven to vibrate.
the vibration frequency of the high-frequency vibrator 1 is set according to actual conditions, in the embodiment, the vibration frequency of the high-frequency vibrator 1 is 10-20 times of the vibration frequency of the actuating mechanism 4, and the specific vibration frequency is set according to detection requirements.
The invention also provides a method for detecting a fault of a vibration monitoring device, comprising the following steps:
and S1, acquiring the frequencies of all the inductors 3 in the operation of the executing mechanism 4, wherein the frequencies are respectively P (1, f), P (2, f) and P (3, f) … … P (n, f).
S2, turning on the high-frequency vibrator 1 to vibrate according to the frequency g, which is 10 to 20 times the vibration frequency of the actuator 4 (the specific vibration frequency is set according to actual requirements), as shown in fig. 2 and 3, collecting the current frequencies of all sensors: [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ].
S3, determining whether the frequency difference between [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ] and g exceeds ± 10Hz, and if so, determining that the corresponding inductor is faulty, theoretically, the [ P (n, f) + P (n, g) ] of each vibrator should be the same as g (therefore, fig. 2 is a theoretical diagram), and if not, the difference is denoted as g' (see fig. 3).
In this embodiment, the range of the frequency difference is ± 10Hz, the range of the frequency difference can be adjusted according to the sensitivity required by the detection, and can be ± 10Hz, and the range of the frequency difference with the highest sensitivity is ± 1 Hz.
Meanwhile, when the out-of-tolerance between the amplitude data of the g frequency point detected by one sensor and the amplitude data of other sensors is larger than the allowable range, the sensor is judged to be in fault, and replacement and maintenance are needed.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (4)
1. A method for online detection of vibration monitoring device failure, comprising the steps of:
The device for detecting the faults of the vibration monitoring device on line comprises a high-frequency vibrator (1), wherein the high-frequency vibrator (1) is fixedly connected with the vibration monitoring device (2) through a rigid connecting piece, the high-frequency vibrator (1) can vibrate at high frequency, the rigid connecting piece drives the vibration monitoring device (2) to vibrate, and the vibration frequency of the vibration monitoring device (2) is changed; the vibration monitoring device (2) comprises a plurality of inductors (3), the inductors (3) are fixed on the executing mechanism (4), and the high-frequency vibrator (1) is fixed with the executing mechanism (4) through a rigid connecting piece;
Acquiring the frequencies of all the inductors (3) in the operation of the executing mechanism (4), wherein the frequencies are P (1, f), P (2, f), P (3, f) … … P (n, f);
starting a high-frequency vibrator (1) to vibrate according to the frequency of g, and collecting the current frequencies of all inductors: [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ];
Judging whether the frequency difference between the [ P (1, f) + P (1, g) ], [ P (2, f) + P (2, g) ], [ P (3, f) + P (1, g) ] … … [ P (n, f) + P (n, g) ] and g ] exceeds +/-10 Hz, and if so, judging that the corresponding inductor has a fault.
2. A method for on-line detection of vibration monitoring device faults as claimed in claim 1, wherein: the frequency g is 10-20 times of the vibration frequency of the actuating mechanism (4).
3. a method for on-line detection of vibration monitoring device faults as claimed in claim 1, wherein: the frequency difference ranges from + -5 Hz.
4. a method for on-line detection of vibration monitoring device faults as claimed in claim 1, wherein: the frequency difference ranges from ± 1 Hz.
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| CN201710285574.1A CN106932089B (en) | 2017-04-27 | 2017-04-27 | Device and method for detecting faults of vibration monitoring device on line |
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| CN201710285574.1A CN106932089B (en) | 2017-04-27 | 2017-04-27 | Device and method for detecting faults of vibration monitoring device on line |
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| CN106932089B true CN106932089B (en) | 2019-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107633116B (en) * | 2017-08-25 | 2020-12-25 | 中国船舶重工集团公司第七一九研究所 | Multi-fault detection sequence calculation method |
| CN113155262B (en) * | 2021-05-17 | 2021-10-26 | 北京助创科技有限公司 | Vibration sensor with diagnosis function and method for detecting vibration of moving equipment thereof |
| CN113295418B (en) * | 2021-05-25 | 2022-03-22 | 株洲科盟车辆配件有限责任公司 | Intelligent vibration monitoring system for railway wagon bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3874110B2 (en) * | 2002-08-30 | 2007-01-31 | 日本精工株式会社 | Abnormality diagnosis system |
| CN101165460A (en) * | 2006-10-20 | 2008-04-23 | 上海瑞视仪表电子有限公司 | Current eddy displacement/ vibration sensor system calibration instrument |
| CN203811624U (en) * | 2014-03-26 | 2014-09-03 | 中国科学院地质与地球物理研究所 | System for detecting characteristics of acceleration sensor chip of microelectronic mechanic system |
| CN105136282A (en) * | 2015-05-29 | 2015-12-09 | 江阴市华恒仪表有限公司 | Vibration monitoring protection instrument |
| CN206095564U (en) * | 2016-10-31 | 2017-04-12 | 成都中航华测科技有限公司 | Vibration test detecting system |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3874110B2 (en) * | 2002-08-30 | 2007-01-31 | 日本精工株式会社 | Abnormality diagnosis system |
| CN101165460A (en) * | 2006-10-20 | 2008-04-23 | 上海瑞视仪表电子有限公司 | Current eddy displacement/ vibration sensor system calibration instrument |
| CN203811624U (en) * | 2014-03-26 | 2014-09-03 | 中国科学院地质与地球物理研究所 | System for detecting characteristics of acceleration sensor chip of microelectronic mechanic system |
| CN105136282A (en) * | 2015-05-29 | 2015-12-09 | 江阴市华恒仪表有限公司 | Vibration monitoring protection instrument |
| CN206095564U (en) * | 2016-10-31 | 2017-04-12 | 成都中航华测科技有限公司 | Vibration test detecting system |
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