CN116358693A - Part health monitoring and alarming method, system, medium and equipment - Google Patents
Part health monitoring and alarming method, system, medium and equipment Download PDFInfo
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- CN116358693A CN116358693A CN202310123285.7A CN202310123285A CN116358693A CN 116358693 A CN116358693 A CN 116358693A CN 202310123285 A CN202310123285 A CN 202310123285A CN 116358693 A CN116358693 A CN 116358693A
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
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Abstract
The invention relates to the technical field of vibration monitoring, in particular to a part health monitoring and alarming method, a system, a medium and equipment. The part health monitoring and alarming method comprises the following steps: acquiring vibration signals of the parts, wherein the vibration signals comprise vibration excitation signals and vibration response signals; according to the relation of the vibration response signal relative to the vibration excitation signal, working deformation data and frequency response data of the parts are obtained; and alarming when the working deformation data is larger than or equal to a first threshold value or when the frequency response data is larger than or equal to a second threshold value. The invention solves the problem that the existing monitoring method is seriously affected by a single sensor.
Description
Technical Field
The invention relates to the technical field of vibration monitoring, in particular to a part health monitoring and alarming method, a system, a medium and equipment.
Background
When the whole machine/whole vehicle system operates, each part is excited by an engine to generate structural vibration, the vibration expression form is structural vibration deformation generally, the vibration deformation quantity fluctuates along with the change of the rotating speed/working load of the engine, and the final result is that the part structure generates vibration fatigue damage (such as plate crack, pipeline fracture, bolt fracture/looseness and the like), and at the moment, the structural vibration deformation often generates abrupt change.
In the prior art, a vibration sensor is used for testing and monitoring the vibration response of a sample piece, and a signal conditioning and acquisition unit transmits acquired data to a signal analysis processing module and a health state evaluation module in an industrial personal computer. The signal analysis processing module analyzes and processes the signals collected by the measuring units, and the health state evaluation module monitors and evaluates the health state by extracting the characteristic parameters of the monitoring signals. In the scheme, each vibration sensor is an independent unit, a time domain signal is generally collected, the working state of each vibration sensor is independently judged according to the actually measured time domain vibration signal of each sensor, and the system function is obviously influenced by the reliability of a single sensor.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the invention aims to provide a part health monitoring and alarming method so as to solve the problem that the existing monitoring method is seriously influenced by a single sensor.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a part health monitoring and alarming method comprises the following steps:
acquiring vibration signals of the parts, wherein the vibration signals comprise vibration excitation signals and vibration response signals;
according to the relation of the vibration response signal relative to the vibration excitation signal, working deformation data and frequency response data of the parts are obtained;
and alarming when the working deformation data is larger than or equal to a first threshold value or when the frequency response data is larger than or equal to a second threshold value.
Preferably, when the vibration signals of the parts are acquired, at least one vibration excitation signal is acquired, and at least two vibration response signals are acquired.
Preferably, the vibration excitation signal includes an excitation signal intensity and an excitation signal frequency, and the vibration response signal includes a response signal intensity and a response signal frequency.
Preferably, the first threshold is a work deformation abrupt change value, and the second threshold is a frequency response abrupt change value.
Preferably, the vibration frequency range of the monitoring part is 1-1000 Hz.
Preferably, the monitoring result is transmitted to the remote terminal through the wireless network.
According to other embodiments, the present disclosure further adopts the following technical solutions:
a component health monitoring alarm system comprising:
the first vibration sensor is arranged at the mounting position of the part and is used for monitoring a vibration excitation signal of the part;
the second vibration sensor is arranged at the position of the part body and is used for monitoring vibration response signals of the part, and the position of the part body is other positions except the mounting position of the part;
the signal acquisition module acquires the vibration excitation signal and the vibration response signal and records the vibration excitation signal and the vibration response signal in real time;
the data processing module is used for obtaining working deformation data and frequency response data of the parts according to the relation of the vibration response signals relative to the vibration excitation signals;
and the vibration alarm module is used for alarming when the working deformation data is larger than or equal to a first threshold value or alarming when the frequency response data is larger than or equal to a second threshold value.
Preferably, the vibration sensor further comprises a power module for supplying power to the first vibration sensor, the second vibration sensor, the signal acquisition module, the data processing module and the vibration alarm module.
According to other embodiments, the present disclosure further adopts the following technical solutions:
a computer readable storage medium having stored thereon a computer program which when executed by a processor performs a component health monitoring alarm method as described above.
According to other embodiments, the present disclosure further adopts the following technical solutions:
a terminal device comprising a processor and a computer readable storage medium, the processor configured to implement instructions; the computer readable storage medium is for storing a plurality of instructions adapted to be loaded by a processor and to perform the component health monitoring alarm method as described above.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
1. according to the invention, the vibration signals of the mounting positions of the parts are used as vibration excitation signals, the vibration signals of other positions of the parts are used as vibration response signals, the relation between the vibration response signals and the vibration excitation signals is calculated, the motion relation of each measuring point in the same coordinate system is obtained, the influence caused by a single sensor is reduced, the states of the parts are calculated and evaluated in real time and fed back, the states of the parts are effectively monitored and alarmed in the working process, and finally the aim of improving the reliability of the whole machine/the whole vehicle is fulfilled.
2. The invention can realize the purpose of single monitoring of single measuring point by comparing the frequency domain signal between the vibration response signal and the vibration excitation signal of any measuring point.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a part health monitoring and alarming method provided by the invention;
the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present disclosure. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Structural vibration: the mechanical structure is excited to produce vibrations, and structural damage is typically caused by low and medium frequency vibrations.
Work deformation analysis (ODS): operational Deflection Shape the response of the structure in the operating state, the deformation mode shape is displayed using the response of the time domain or the frequency domain, and the ODS is a superposition of modes of each order. ODSs are divided into time-domain ODSs and frequency-domain ODSs. The time domain ODS is the superposition of all modes at this point in time, and the frequency domain ODS is the superposition of all modes at the current frequency.
According to the invention, the plurality of acceleration sensors are arranged on the key parts for monitoring vibration response in real time, vibration response analysis and working deformation analysis are performed through data processing, real-time feedback is performed, and the alarm can be performed when abnormal vibration occurs on the parts, so that the purposes of vibration monitoring and alarm are achieved.
Example 1
As mentioned in the background art, the existing mode of testing and monitoring the sample by using the vibration sensors requires a large number of sensors to work simultaneously to realize the system monitoring and alarming function, but each vibration sensor is an independent unit and is usually collected as a time domain signal, the working state of each vibration sensor is judged independently according to the actually measured time domain vibration signals of each sensor, and the system function is obviously influenced by the reliability of a single sensor.
Based on this, the invention provides a part health monitoring and alarming method, as shown in fig. 1, comprising the following steps:
step one, vibration signals of the parts are obtained, wherein the vibration signals comprise vibration excitation signals and vibration response signals.
1. Vibration of the mounting position of the component and vibration of the body of the component are monitored by using a vibration sensor.
The installation position refers to a position with small vibration of parts or a position closest to an engine body in a complete machine/whole vehicle system. The component body refers to other locations in the component assembly than the mounting location and may be not only local locations of interest.
2. Vibration signals are received from the vibration sensor and data is recorded in real time.
Receiving vibration signals monitored by the mounting position of the parts, namely vibration excitation signals X 1 The method comprises the steps of carrying out a first treatment on the surface of the Receiving vibration signals of the monitoring of the body position of the part, namely a vibration response signal Y 1 、Y 2 、Y 3 ……Y n . Wherein, at least one vibration excitation signal is collected, and at least two vibration response signals are collected. More vibration response signals enable detailed operational deformations of the whole system, and if the vibration response signals are too few, the vibration characteristics may be lacking. For example, one surface may bend/twist/locally bulge, and if the sensor is too few, only bending deformation may be detected. Specifically, the number of vibration response signals can be reasonably selected by those skilled in the art according to the specific working conditions of the pre-monitored components.
Step two, working deformation data O of the parts are calculated according to the relation of the vibration response signals relative to the vibration excitation signals 1 And frequency response data F 1 And records the data in real time.
The vibration excitation signal intensity and frequency are monitored in real time at the part installation position, the vibration response signal intensity and frequency are monitored in real time at the part body position, and the real-time working deformation and frequency response of the part are obtained through the vibration excitation and response signal intensity and frequency data processing (using testlab software; the conversion and inverse conversion of signals from time domain to frequency domain and through Fourier transformation) and real-time feedback is carried out.
It will be appreciated that the pre-processing may be performed prior to data processing of the vibration excitation signal and the vibration response signal, including: and carrying out noise reduction and filtering on the vibration excitation signal and carrying out noise reduction and filtering on the vibration response signal, wherein the specific noise reduction and filtering processes adopt the existing processing means.
And thirdly, alarming when the working deformation data is larger than or equal to a first threshold value or alarming when the frequency response data is larger than or equal to a second threshold value.
Wherein the first threshold value is a work deformation abrupt change value O 2 The second threshold value is a frequency response mutation value F 2 And alarming when abnormal vibration (vibration deformation and abrupt change of frequency response) occurs to the parts. Work deformation mutation value O 2 And a frequency response mutation value F 2 Obtained empirically.
The vibration response of each part system can be generated in the working process, and the working deformation of the part structure in a stable working state and the frequency response of each measuring point are not greatly changed relative to the installation position (set as an excitation signal).
When the sample piece is in a normal undamaged state and the machine stably runs, under the working condition, the engine excitation is stable, and the response of the sample piece is stable: the vibration amplitude does not vary much, for example within + -5 mm/s. The frequency response is to consider that the modal frequency of the sample is fixed, and the modal frequency only changes when the structure of the sample changes (such as loosening/breaking/large deformation, etc.), for example, the initial modal frequency is 100Hz, after the structure loosens or cracks, the modal frequency becomes 90Hz, the vibration response corresponding to 100Hz is often lower, and the vibration response corresponding to 90Hz is obviously increased, so that the structural change can be judged according to the characteristics.
According to the invention, the frequency response cross power of the body position of the part and the mounting position of the part is utilized for health monitoring, and the cross power can represent the correlation between the two signals in amplitude and phase. When the frequency response change reaches a certain range, for example, the vibration response signal 1 and the vibration response signal 2 are initially 1@100Hz and 1@100Hz relative to the excitation signal 1, if the frequency response change is 50@100Hz and 2@100Hz in the operation process, the corresponding measuring point of the vibration response signal 1 is judged to be faulty, the corresponding measuring point of the vibration response signal 2 is small in change, and the judgment is normal.
According to the invention, the vibration signals of the mounting positions of the parts are used as vibration excitation signals, the vibration signals of other positions of the part body are used as vibration response signals, and the relation between the vibration response signals and the vibration excitation signals is calculated, so that the motion relation of each measuring point in the same coordinate system is obtained. The invention reduces the influence caused by a single sensor, calculates and evaluates the states of the parts in real time and feeds back the states of the parts, effectively monitors the states of the parts and gives an alarm in the working process, and finally achieves the aim of improving the reliability of the whole machine/the whole vehicle.
Example two
The embodiment provides a part health monitoring alarm system, includes:
at least one first vibration sensor for monitoring vibration of the component mounting location;
the at least two second vibration sensors are used for monitoring the position vibration of the part body;
the signal acquisition module is used for receiving vibration signals from the first vibration sensor and the second vibration sensor and recording data in real time;
data processing module for completing work deformation O 1 Frequency response F 1 And recording data in real time;
the vibration alarm module is used for completing the comparison of the real-time working deformation and the frequency response data, and alarming when the working deformation data is larger than or equal to a first threshold value or alarming when the frequency response data is larger than or equal to a second threshold value;
the power module is used for supplying power to the first vibration sensor, the second vibration sensor, the signal acquisition module, the data processing module and the vibration alarm module.
The health monitoring alarm system can realize real-time recording of time domain signals and frequency domain signals, real-time calculation and evaluation of the states of the parts and feedback are carried out by monitoring the working deformation and the frequency response of the parts, the states of the parts are effectively monitored and alarm is carried out in the working process, the aim of improving the reliability of the whole machine/the whole vehicle is finally realized, and the remote visual monitoring can be realized by utilizing a wireless network.
In addition, the prior art also has a mode of collecting vibration response by means of a high-speed camera, and the analysis frequency is low (1-60 Hz); moreover, the illumination condition of the working environment where the monitoring sample is located is strictly required, and the relative vibration between the camera and the sample has great influence on the test result.
According to the invention, the vibration sensor is used for vibration deformation monitoring, so that strict requirements on the working environment of the sample are not met, and the monitoring purpose is easier to realize; and the state monitoring in the vibration frequency range of 1-1000 Hz can be realized by selecting vibration sensors in different applicable frequency ranges.
Example III
An object of the present embodiment is to provide a computer-readable storage medium.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method of embodiment one.
Example IV
In one embodiment of the disclosure, a terminal device is provided, including a processor and a computer readable storage medium, where the processor is configured to implement instructions; the computer readable storage medium is for storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of the method of embodiment one.
It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the specific embodiments of the present disclosure have been described above with reference to the drawings, it should be understood that the present disclosure is not limited to the embodiments, and that various modifications and changes can be made by one skilled in the art without inventive effort on the basis of the technical solutions of the present disclosure while remaining within the scope of the present disclosure.
Claims (10)
1. A part health monitoring and alarming method is characterized by comprising the following steps:
acquiring vibration signals of the parts, wherein the vibration signals comprise vibration excitation signals and vibration response signals;
according to the relation of the vibration response signal relative to the vibration excitation signal, working deformation data and frequency response data of the parts are obtained;
and alarming when the working deformation data is larger than or equal to a first threshold value or when the frequency response data is larger than or equal to a second threshold value.
2. The component health monitoring and alarming method according to claim 1, wherein at least one vibration excitation signal is acquired and at least two vibration response signals are acquired when the vibration signals of the component are acquired.
3. The component health monitoring alarm method as set forth in claim 1, wherein said vibration excitation signal includes an excitation signal intensity and an excitation signal frequency, and said vibration response signal includes a response signal intensity and a response signal frequency.
4. The component health monitoring and alarming method of claim 1, wherein the first threshold is a work deformation abrupt change value and the second threshold is a frequency response abrupt change value.
5. The component health monitoring and alarming method according to claim 1, wherein the vibration frequency range of the monitored component is 1-1000 Hz.
6. The component health monitoring and alarming method of claim 1, wherein the monitoring result is transmitted to the remote terminal through a wireless network.
7. A component health monitoring alarm system, comprising:
the first vibration sensor is arranged at the mounting position of the part and is used for monitoring a vibration excitation signal of the part;
the second vibration sensor is arranged at the position of the part body and is used for monitoring vibration response signals of the part, and the position of the part body is other positions except the mounting position of the part;
the signal acquisition module acquires the vibration excitation signal and the vibration response signal and records the vibration excitation signal and the vibration response signal in real time;
the data processing module is used for obtaining working deformation data and frequency response data of the parts according to the relation of the vibration response signals relative to the vibration excitation signals;
and the vibration alarm module is used for alarming when the working deformation data is larger than or equal to a first threshold value or alarming when the frequency response data is larger than or equal to a second threshold value.
8. The component health monitoring and alarm system of claim 7 further comprising a power module for powering the first vibration sensor, the second vibration sensor, the signal acquisition module, the data processing module, and the vibration alarm module.
9. A computer readable storage medium, characterized in that a computer program is stored thereon, which program, when being executed by a processor, performs the part health monitoring and alarm method as claimed in any of claims 1-6.
10. A terminal device comprising a processor and a computer readable storage medium, the processor configured to implement instructions; a computer readable storage medium for storing a plurality of instructions adapted to be loaded by a processor and to perform the component health monitoring and alert method according to any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310123285.7A CN116358693A (en) | 2023-02-14 | 2023-02-14 | Part health monitoring and alarming method, system, medium and equipment |
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| CN202310123285.7A CN116358693A (en) | 2023-02-14 | 2023-02-14 | Part health monitoring and alarming method, system, medium and equipment |
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| CN116358693A true CN116358693A (en) | 2023-06-30 |
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| CN202310123285.7A Pending CN116358693A (en) | 2023-02-14 | 2023-02-14 | Part health monitoring and alarming method, system, medium and equipment |
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- 2023-02-14 CN CN202310123285.7A patent/CN116358693A/en active Pending
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