CN107365902B - A kind of effect of vibration stress relief online rating system and method based on the fusion of multiple acceleration transducers information - Google Patents
A kind of effect of vibration stress relief online rating system and method based on the fusion of multiple acceleration transducers information Download PDFInfo
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- CN107365902B CN107365902B CN201710819758.1A CN201710819758A CN107365902B CN 107365902 B CN107365902 B CN 107365902B CN 201710819758 A CN201710819758 A CN 201710819758A CN 107365902 B CN107365902 B CN 107365902B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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Abstract
Card, analog line driver, vibration excitor, acceleration transducer group, charge amplifier, oscillograph, data collecting card, support device occurs based on the effect of vibration stress relief online rating system of multiple acceleration transducers information fusion, including master system, random waveform；Vibration excitor is fixed on the surface of workpiece, and workpiece is supported using flexible support device；Master system includes the storage collected acceleration signal memory module of acceleration transducer group, data Layer blending algorithm based on variance contribution ratio writes module, acceleration signal Fusion Module, fused acceleration signal memory module, shows the display module of fused acceleration signal.Effect of vibration stress relief on-line evaluation method based on the fusion of multiple acceleration transducers information carries out data fusion in data Layer to collected acceleration signal using the data Layer blending algorithm based on variance contribution ratio.The present invention have the advantages that can online, reliably evaluate effect of vibration stress relief.
Description
Technical field
The present invention relates to vibration aging technology fields, when refering in particular to a kind of vibration based on the fusion of multiple acceleration transducers information
Imitate effect online rating system and method.
Technical background
The effect assessment of vibration aging technology is one of the critical issue in vibration aging technology field.Oscillating aging skill at present
The effect evaluation method of art specifically includes that parameter curve rating method, residual stress measurement method, precision stability detection method and moves
Stress criterion method.
(1) parameter curve rating method
Parameter curve rating method be occurred according to parameter during oscillating aging regular variation phenomenon sum up come,
Qualitative evaluation can be carried out to the effect of oscillating aging, when interpretational criteria used specifically include that amplitude during oscillating aging
Declining after flattening, rise after rising, which occurs, in half interval contour to be then leveled off；The resonance peak of frequency sweep curve is than vibration after vibration stress relief treatment
It is increased before dynamic ageing treatment；The resonant frequency of frequency sweep curve before vibration stress relief treatment than reducing after vibration stress relief treatment；When vibration
The bandwidth of frequency sweep curve before vibration stress relief treatment than narrowing after effect processing.Parameter curve rating method be although it is a kind of online, intuitive,
Quickly and easily method, but when using parameter curve rating method evaluation effect of vibration stress relief, only arranged on workpiece it is single plus
Velocity sensor since the acceleration signal of acceleration transducer acquisition back is easy the interference by extraneous factor, and is worked as
When acceleration transducer breaks down, will lead to the signal of acquisition back is not the true acceleration signal of workpiece, and these
The appearance of situation all can cause parameter curve rating method that can not accurately and reliably evaluate effect of vibration stress relief.
(2) residual stress measurement method
In order to accurately evaluate the effect of oscillating aging regulation residual stress, it is necessary to accurately assess Workpiece vibration timeliness
The residual stress of front and back, however the residual stress distribution condition of workpiece surface, especially some complex part surface residual stress
Distribution, be difficult to adopt theoretical calculation method carry out analysis and solution, so using experiment measurement method assess workpiece
The size of surface residual stress has important practical significance.The experimental measurement method of residual stress, which specifically includes that, at present damages
Mechanical measurement method and lossless physical measurement method, can quantitatively assessment Workpiece vibration ageing treatment before and after residual stress.
Mechanical measurement method mainly includes orifice method, slitting method etc.；Physical measurement method mainly includes x-ray method, supercritical ultrasonics technology etc..Remnants are answered
Power mensuration belongs to offline evaluation method, can only evaluate after oscillating aging process timeliness effect, and residual
Residue stress mensuration is costly, and time-consuming, is not easy to apply in the fast production scene of rhythm.
(3) precision stability detection method
Precision stability detection method is to evaluate vibration aging technology by the precision after detection Workpiece vibration ageing treatment
Effect, can to the effect of vibration aging technology carry out qualitative evaluation, mainly include long-term placement precision method, plus dynamic loading after
Precision method etc..Long-term placement precision method is will to place for a long time by the workpiece after vibration stress relief treatment and periodic detection workpiece
Dimensional stability, concrete operations process are detected for the first time when placing 15 days, placement later primary, total every detection in 30 days
Time should be more than half a year；Adding precision method after dynamic loading is to detect the workpiece after vibration stress relief treatment in dynamic load effect
The variable quantity of dimensional accuracy afterwards.Precision stability detection method also belongs to qualitative evaluation method, medium-term and long-term placement precision method
Time-consuming for test process, there is significant limitation.Although adding precision method after dynamic loading quick, to measuring device required precision
High, operating difficulties, is difficult to popularize.
(4) dynamic stress criterion method
The Chen Ligong professor team of Shanghai Communications University proposes dynamic stress criterion method, because dynamic stress is as oscillating aging
Most important parameter in the process, inevitable there are certain correlations with effect of vibration stress relief.They study discovery dynamic stress and remnants
There are quantitative non-linear dependencies between stress release effect, and by mathematical regression analysis and curve matching obtain them it
Between approximate function DP-CH equation, can during oscillating aging on-line checking dynamic stress, real-time quantitative judgement vibration
The effect of timeliness.But dynamic stress criterion method be it is approximate with timeliness effect relation to dynamic stress according to field application experience, comment
Valence precision is low, and dynamic stress measurement is difficult with assessment, and vibration aging technology national standard not yet provides it, furthermore influences
There are many factor of dynamic stress criterion, such as Fine Texture of Material, external condition.Therefore, dynamic stress criterion method and not perfect, need to also be into
The a large amount of test of row is to establish dynamic stress criterion form.
Although existing evaluation method can not be to vibration at present there is the effect evaluation method of some vibration aging technologies
Dynamic timeliness effect carries out online, reliable evaluation, it is therefore necessary to carry out to effect of vibration stress relief on-line evaluation method further
Research and exploration.For deficiency existing for existing effect of vibration stress relief evaluation method, the present invention proposes that one kind is based on adding speed
The effect of vibration stress relief online rating system and method for sensor data fusion are established and are melted based on multiple acceleration transducers information
The effect of vibration stress relief online rating system of conjunction, for carrying out online, reliable evaluation to effect of vibration stress relief.
Summary of the invention
For deficiency existing for existing effect of vibration stress relief evaluation method, the present invention proposes that one kind is based on adding velocity pick-up
The effect of vibration stress relief online rating system and method for device information fusion, i.e. foundation are merged based on multiple acceleration transducers information
Effect of vibration stress relief online rating system, for carrying out online, reliable evaluation to effect of vibration stress relief.
Based on multiple acceleration transducers information fusion effect of vibration stress relief online rating system, including master system,
Random waveform occur card, analog line driver, vibration excitor, acceleration transducer group, charge amplifier, oscillograph, data collecting card,
Support device；Vibration excitor is fixed on the surface of workpiece, and workpiece is supported using flexible support device；
Master system controls random waveform and the independent and continuously adjustable sinusoidal excitation of card output amplitude and frequency occurs
Signal；The sinusoidal excitation signal that card output occurs for random waveform is input to vibration excitor via analog line driver, and driving vibration excitor produces
Raw vibration；
Acceleration transducer in acceleration transducer group is mounted on workpiece, and the acceleration in acceleration transducer group passes
The connection of the input channel of sensor and charge amplifier, the output channel of charge amplifier are connect with oscillograph, oscillograph and data
Capture card connection, data collecting card are connect with master system；
Master system includes the storage collected acceleration signal memory module of acceleration transducer group, is based on variance tribute
The data Layer blending algorithm for offering rate writes module, acceleration signal Fusion Module, and fused acceleration signal memory module is shown
Show the display module of fused acceleration signal.
Further, acceleration transducer is piezoelectric acceleration transducer.
Further, support device is elastic element.
Further, the acceleration transducer number S for including in acceleration sensing group is positive integer, and S >=3.
The sensor that the present invention uses is acceleration transducer, is same type sensor, therefore acceleration signal only needs
It to be merged in data Layer, the present invention is using the data Layer blending algorithm based on variance contribution ratio.
If certain acceleration transducer collects an acceleration signal of workpiece with a certain sample frequency in sampling time t
Data sequence M (k), discrete k number are respectively m according to value1,m2,…,mk.Define data value miTo what is acquired in time t
The variance contribution ratio of data sequence is
In formula:The respectively mean value of discrete signal M (k) and variance.
When having S similar acceleration transducers in certain time length while when acquiring k acceleration information, if acceleration
Q-th of data of sensor s acquisition are msq, according to equation (1), variance contribution ratio can be expressed as
In formula: μs、The respectively desired value and variance of the collected k discrete signal of s acceleration transducer.
According to the variance contribution ratio of different measuring points acceleration signal time data, q-th of acceleration transducer s acquisition
Data msqThe fusion coefficients λ of distributionsqFor
Then the value of q point is after data fusion
Data Layer Fusion Model based on variance contribution ratio first carries out S acceleration transducer in q-th of data point
Fusion, obtains Mq, then q=1,2 ..., k are traversed, it can the time-history curves of signal after being merged.
Based on multiple acceleration transducers information fusion effect of vibration stress relief on-line evaluation method the following steps are included:
(1), workpiece is fixedly connected with vibration excitor；Workpiece is supported by flexible support device, so as to
Vibration excitor carries out exciting to workpiece；Acceleration transducer in acceleration transducer group is mounted on workpiece；Connect host computer
Signal link between card occurs for system and random waveform；The signal that random waveform occurs between card and analog line driver is connected to connect
Line；Connect the signal link between analog line driver and vibration excitor；Connect acceleration transducer group in acceleration transducer with
Signal link between charge amplifier；Connect the signal link between charge amplifier and oscillograph；Connect oscillograph and number
According to the signal link between capture card；Connect the signal link between data collecting card and master system；Connect host computer system
The power supply of card, analog line driver, vibration excitor, charge amplifier, oscillograph and data collecting card occurs for system, random waveform；
(2), master system control random waveform, which occurs to block, carries out frequency sweep vibration to workpiece, so that it is determined that oscillating aging
Driving frequency；
(3), the gain knob of slow regulation power driver makes analog line driver export constant electric current, drives vibration excitor
Vibration stress relief treatment is carried out to workpiece；
(4), the data Layer blending algorithm based on variance contribution ratio in master system, which is write to write in module, is based on
The data Layer blending algorithm program of variance contribution ratio；To storage acceleration transducer group acquisition in acceleration signal Fusion Module
To acceleration signal memory module in the acceleration signal that stores carry out data fusion；Fused acceleration signal is stored
It is shown to fused acceleration signal memory module, and by the display module of fused acceleration signal；
(5), effect of vibration stress relief is evaluated using the amplitude of fused acceleration signal, when master system is aobvious
When the amplitude stability of the fused acceleration signal shown, stop carrying out vibration stress relief treatment to workpiece.
Technical concept of the invention is: card, analog line driver, vibration excitor, acceleration occurs by master system, random waveform
It spends sensor group, charge amplifier, oscillograph, data collecting card and support device composition and is based on multiple acceleration transducers information
The effect of vibration stress relief online rating system of fusion；Added using the data Layer blending algorithm based on variance contribution ratio to collected
Speed signal carries out data fusion in data Layer, when the amplitude stability of fused acceleration signal, stops carrying out workpiece
Vibration stress relief treatment.
Beneficial effects of the present invention are as follows:
1, when parameter curve rating method evaluation effect of vibration stress relief, single acceleration transducer is only arranged on workpiece, by
It is easy the interference by extraneous factor in the acceleration signal of acceleration transducer acquisition back, and when acceleration transducer goes out
When existing failure, will lead to the signal of acquisition back is not the true acceleration signal of workpiece, and the appearance of these situations all can
Cause parameter curve rating method that can not accurately and reliably evaluate effect of vibration stress relief, and the present invention is with multi-sensor technology and information
Based on integration technology, the effect of vibration stress relief online rating system merged based on multiple acceleration transducers information is constructed, it can
Existing deficiency when traditional parameters curve rating method being overcome to evaluate effect of vibration stress relief carries out effect of vibration stress relief to realize
Online, it reliably evaluates.
2, proposed by the present invention compared to residual stress measurement method, precision stability detection method and dynamic stress criterion method
Method, which can be realized, carries out online, reliable evaluation to effect of vibration stress relief.
3, it is proposed by the present invention based on multiple acceleration transducers information fusion effect of vibration stress relief online rating system and
Method will not generate damage to workpiece when evaluating effect of vibration stress relief, belong to lossless evaluation method.
4, the effect of vibration stress relief online rating system pair proposed by the present invention based on the fusion of multiple acceleration transducers information
It when effect of vibration stress relief carries out on-line evaluation, is controlled by master system, without manual operation, reduces work
Amount, improves work efficiency.
5, it is proposed by the present invention based on multiple acceleration transducers information fusion effect of vibration stress relief online rating system and
Method, which can be realized, carries out online, reliable evaluation to effect of vibration stress relief, provides to study the evaluation method of effect of vibration stress relief
New thinking.
Detailed description of the invention
The effect of vibration stress relief online rating system schematic diagram that Fig. 1 is merged based on multiple acceleration transducers information.
Data Layer Fusion Model schematic diagram of the Fig. 2 based on variance contribution ratio.
Specific embodiment
Referring to attached drawing, the present invention is further illustrated:
Based on multiple acceleration transducers information fusion effect of vibration stress relief online rating system, including master system,
Random waveform occur card, analog line driver, vibration excitor, acceleration transducer group, charge amplifier, oscillograph, data collecting card,
Support device；Vibration excitor is fixed on the surface of workpiece, and workpiece is supported using flexible support device；
Master system controls random waveform and the independent and continuously adjustable sinusoidal excitation of card output amplitude and frequency occurs
Signal；The sinusoidal excitation signal that card output occurs for random waveform is input to vibration excitor via analog line driver, and driving vibration excitor produces
Raw vibration；
Acceleration transducer in acceleration transducer group is mounted on workpiece, and the acceleration in acceleration transducer group passes
The connection of the input channel of sensor and charge amplifier, the output channel of charge amplifier are connect with oscillograph, oscillograph and data
Capture card connection, data collecting card are connect with master system；
Master system includes the storage collected acceleration signal memory module of acceleration transducer group, is based on variance tribute
The data Layer blending algorithm for offering rate writes module, acceleration signal Fusion Module, and fused acceleration signal memory module is shown
Show the display module of fused acceleration signal.
Further, acceleration transducer is piezoelectric acceleration transducer.
Further, support device is elastic element.
Further, the acceleration transducer number S for including in acceleration sensing group is positive integer, and S >=3.
The sensor that the present invention uses is acceleration transducer, is same type sensor, therefore acceleration signal only needs
It to be merged in data Layer, the present invention is using the data Layer blending algorithm based on variance contribution ratio.
If certain acceleration transducer collects an acceleration signal of workpiece with a certain sample frequency in sampling time t
Data sequence M (k), discrete k number are respectively m according to value1,m2,…,mk.Define data value miTo what is acquired in time t
The variance contribution ratio of data sequence is
In formula:The respectively mean value of discrete signal M (k) and variance.
When having S similar acceleration transducers in certain time length while when acquiring k acceleration information, if acceleration
Q-th of data of sensor s acquisition are msq, according to equation (1), variance contribution ratio can be expressed as
In formula: μs、The respectively desired value and variance of the collected k discrete signal of s acceleration transducer.
According to the variance contribution ratio of different measuring points acceleration signal time data, q-th of acceleration transducer s acquisition
Data msqThe fusion coefficients λ of distributionsqFor
Then the value of q point is after data fusion
Data Layer Fusion Model based on variance contribution ratio first carries out S acceleration transducer in q-th of data point
Fusion, obtains Mq, then q=1,2 ..., k are traversed, it can the time-history curves of signal after being merged.
Based on multiple acceleration transducers information fusion effect of vibration stress relief on-line evaluation method the following steps are included:
(1), workpiece is fixedly connected with vibration excitor；Workpiece is supported by flexible support device, so as to
Vibration excitor carries out exciting to workpiece；Acceleration transducer in acceleration transducer group is mounted on workpiece；Connect host computer
Signal link between card occurs for system and random waveform；The signal that random waveform occurs between card and analog line driver is connected to connect
Line；Connect the signal link between analog line driver and vibration excitor；Connect acceleration transducer group in acceleration transducer with
Signal link between charge amplifier；Connect the signal link between charge amplifier and oscillograph；Connect oscillograph and number
According to the signal link between capture card；Connect the signal link between data collecting card and master system；Connect host computer system
The power supply of card, analog line driver, vibration excitor, charge amplifier, oscillograph and data collecting card occurs for system, random waveform；
(2), master system control random waveform, which occurs to block, carries out frequency sweep vibration to workpiece, so that it is determined that oscillating aging
Driving frequency；
(3), the gain knob of slow regulation power driver makes analog line driver export constant electric current, drives vibration excitor
Vibration stress relief treatment is carried out to workpiece；
(4), the data Layer blending algorithm based on variance contribution ratio in master system, which is write to write in module, is based on
The data Layer blending algorithm program of variance contribution ratio；To storage acceleration transducer group acquisition in acceleration signal Fusion Module
To acceleration signal memory module in the acceleration signal that stores carry out data fusion；Fused acceleration signal is stored
It is shown to fused acceleration signal memory module, and by the display module of fused acceleration signal；
(5), effect of vibration stress relief is evaluated using the amplitude of fused acceleration signal, when master system is aobvious
When the amplitude stability of the fused acceleration signal shown, stop carrying out vibration stress relief treatment to workpiece.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (4)
1. being shaken using a kind of effect of vibration stress relief online rating system on-line evaluation based on the fusion of multiple acceleration transducers information
The method of dynamic timeliness effect, the effect of vibration stress relief online rating system packet based on the fusion of multiple acceleration transducers information
Include master system, card, analog line driver, vibration excitor, acceleration transducer group, charge amplifier, oscillography occur for random waveform
Device, data collecting card, support device；Vibration excitor is fixed on the surface of workpiece, workpiece using flexible support device into
Row support；Master system controls random waveform and the independent and continuously adjustable sinusoidal excitation letter of card output amplitude and frequency occurs
Number；The sinusoidal excitation signal that card output occurs for random waveform is input to vibration excitor via analog line driver, and driving vibration excitor generates
Vibration；Acceleration transducer in acceleration transducer group is mounted on workpiece, the acceleration sensing in acceleration transducer group
The connection of the input channel of device and charge amplifier, the output channel of charge amplifier are connect with oscillograph, and oscillograph is adopted with data
Truck connection, data collecting card are connect with master system；Master system includes that storage acceleration transducer group is collected
Acceleration signal memory module, the data Layer blending algorithm based on variance contribution ratio write module, acceleration signal Fusion Module,
Fused acceleration signal memory module, shows the display module of fused acceleration signal, it is characterised in that method is pressed
It is carried out according to following steps:
(1), workpiece is fixedly connected with vibration excitor；Workpiece is supported by flexible support device, so as to exciting
Device carries out exciting to workpiece；Acceleration transducer in acceleration transducer group is mounted on workpiece；Connect master system
The signal link between card occurs with random waveform；Random waveform is connected to occur to block the signal link between analog line driver；
Connect the signal link between analog line driver and vibration excitor；Connect the acceleration transducer and charge in acceleration transducer group
Signal link between amplifier；Connect the signal link between charge amplifier and oscillograph；Oscillograph is connected to adopt with data
Signal link between truck；Connect the signal link between data collecting card and master system；It connects master system, appoint
The power supply of card, analog line driver, vibration excitor, charge amplifier, oscillograph and data collecting card occurs for waveform of anticipating；
(2), card occurs for master system control random waveform to workpiece progress frequency sweep vibration, so that it is determined that the excitation of oscillating aging
Frequency；
(3), the gain knob of slow regulation power driver makes analog line driver export constant electric current, drives vibration excitor to work
Part carries out vibration stress relief treatment；
(4), the data Layer blending algorithm based on variance contribution ratio in master system, which is write in module, writes based on variance
The data Layer blending algorithm program of contribution rate；It is collected to storage acceleration transducer group in acceleration signal Fusion Module
The acceleration signal stored in acceleration signal memory module carries out data fusion；By the storage of fused acceleration signal to melting
Acceleration signal memory module after conjunction, and shown by the display module of fused acceleration signal；
(5), effect of vibration stress relief is evaluated using the amplitude of fused acceleration signal, is shown when master system
When the amplitude stability of fused acceleration signal, stop carrying out vibration stress relief treatment to workpiece.
2. the method as described in claim 1, it is characterised in that: acceleration transducer is piezoelectric acceleration transducer.
3. the method as described in claim 1, it is characterised in that: support device is elastic element.
4. the method as described in claim 1, it is characterised in that: the acceleration transducer number S for including in acceleration sensing group
For positive integer, and S >=3.
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| CN201710819758.1A CN107365902B (en) | 2017-09-13 | 2017-09-13 | A kind of effect of vibration stress relief online rating system and method based on the fusion of multiple acceleration transducers information |
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| CN201710819758.1A CN107365902B (en) | 2017-09-13 | 2017-09-13 | A kind of effect of vibration stress relief online rating system and method based on the fusion of multiple acceleration transducers information |
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| CN107365902B true CN107365902B (en) | 2019-05-03 |
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| CN111783030B (en) * | 2020-06-30 | 2023-11-10 | 瑞声新能源发展(常州)有限公司科教城分公司 | Haptic experience assessment method, device and storage medium |
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| CN104484545B (en) * | 2014-06-13 | 2017-11-14 | 南昌大学 | A kind of aerial drainage structural vibration response dynamic fusion method based on variance contribution ratio |
| CN105861811B (en) * | 2016-04-28 | 2018-02-02 | 上海海事大学 | A kind of online quantitative evaluation system and method for effect of vibration stress relief |
| CN106834657B (en) * | 2016-09-20 | 2020-02-07 | 上海海事大学 | Multidimensional high-frequency micro-vibration aging system and method |
| CN207227503U (en) * | 2017-09-13 | 2018-04-13 | 上海海事大学 | A kind of effect of vibration stress relief online rating system based on multiple acceleration transducers information fusion |
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