CN207396001U - A kind of effect of vibration stress relief online rating system based on the fusion of more strain transducer information - Google Patents
A kind of effect of vibration stress relief online rating system based on the fusion of more strain transducer information Download PDFInfo
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- CN207396001U CN207396001U CN201721168656.XU CN201721168656U CN207396001U CN 207396001 U CN207396001 U CN 207396001U CN 201721168656 U CN201721168656 U CN 201721168656U CN 207396001 U CN207396001 U CN 207396001U
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Abstract
Based on the effect of vibration stress relief online rating system of more strain transducer information fusion, card, analog line driver, vibrator, strain-ga(u)ge transducer group, dynamic strain indicator, data collecting card, support device occurs including master system, random waveform；Vibrator is fixed on the surface of workpiece, and workpiece is supported using flexible support device；Master system includes the strain signal memory module that storage strain-ga(u)ge transducer group collects, data Layer blending algorithm based on variance contribution ratio writes module, strain signal Fusion Module, the strain signal memory module after fusion, the display module of the strain signal after display fusion.The utility model have the advantages that can online, reliably evaluate effect of vibration stress relief.
Description
Technical field
The utility model is related to vibration aging technology fields, refer in particular to a kind of vibration based on the fusion of more strain transducer information
Timeliness effect online rating system and method.
Background technology
The effect assessment of vibration aging technology is one of the key issue in vibration aging technology field.Oscillating aging skill at present
The effect evaluation method of art mainly includes：Parameter curve rating method, residual stress measurement method, precision stability detection method and dynamic
Stress criterion method.
(1) parameter curve rating method
Parameter curve rating method be according to parameter during oscillating aging occur regular variation phenomenon sum up come,
Qualitative evaluation can be carried out to the effect of oscillating aging, interpretational criteria used mainly includes：During oscillating aging during amplitude
Flattening after rising occurs in half interval contour, rise after decline and be then leveled off；The resonance peak ratio of frequency sweep curve shakes after vibration stress relief treatment
It is raised before dynamic ageing treatment；The resonant frequency of frequency sweep curve before vibration stress relief treatment than reducing after vibration stress relief treatment；During 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, directly perceived,
Quickly and easily method, but during use parameter curve rating method evaluation effect of vibration stress relief, single add only is arranged on workpiece
Velocity sensor since the acceleration signal that acceleration transducer acquisition is returned easily is disturbed be subject to extraneous factor, and is worked as
When strain transducer breaks down, it not is the real vibration signal of workpiece that can cause the signal that acquisition is returned, and these situations
Appearance 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 and control residual stress, it is necessary to assess Workpiece vibration timeliness exactly
Front and rear residual stress, however the residual stress distribution situation of workpiece surface, particularly some complex part surface residual stresses
Distribution, be difficult to adopt theoretical calculation method carry out analysis and solution, so using experiment measurement method assessment workpiece
The size of surface residual stress has important practical significance.The experimental measurement method of residual stress mainly includes at present：It damages
Mechanical measurement method and lossless physical measurement method, can quantify 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 should
Power mensuration belongs to offline evaluation method, timeliness effect can only be evaluated after oscillating aging process, 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 detecting the precision after Workpiece vibration ageing treatment
Effect, can to the effect of vibration aging technology carry out qualitative evaluation, mainly including long-term placement precision method, plus dynamic loading after
Precision method etc..Long-term placement precision method is by the long-term placement of workpiece after vibration stress relief treatment and periodic detection workpiece
Dimensional stability, concrete operations flow are detected for the first time when placing 15 days, later detection every 30 days once, total placement
Time should be more than half a year；Precision method is to detect the workpiece after vibration stress relief treatment in dynamic load effect after adding dynamic loading
The variable quantity of dimensional accuracy afterwards.Precision stability detection method falls within qualitatively evaluation method, medium-term and long-term placement precision method
Time-consuming for test process, there is significant limitation.Although add precision method after dynamic loading quick, to measuring apparatus required precision
High, operating difficulties, it is difficult to popularize.
(4) dynamic stress criterion method
The Chen Ligong professors 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, which study, finds 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 equations, can during oscillating aging on-line checking dynamic stress, real-time quantitative judge vibration
The effect of timeliness.But dynamic stress criterion method is approximate with timeliness effect relation to dynamic stress according to field application experience, is commented
Valency precision is low, and dynamic stress measurement is difficult with assessment, and vibration aging technology national standard not yet provides it, influences in addition
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
Row is substantial amounts of to be tested to establish dynamic stress criterion form.
Although at present there is the effect evaluation method of some vibration aging technologies, existing evaluation method can not be to shaking
Dynamic timeliness effect carries out online, reliable evaluation, it is therefore necessary to effect of vibration stress relief on-line evaluation method be carried out further
Research and exploration.In addition, the strain signal that strain transducer collects is compared to the acceleration letter that acceleration transducer collects
It is number more sensitive to the variation of workpiece partial structurtes, and the strain signal that strain transducer collects can be directly changed into work
With the dynamic stress on workpiece, and dynamic stress is the main technologic parameters of oscillating aging, is directly related to the effect of oscillating aging,
Therefore the vibration signal gone using strain transducer during detection oscillating aging can be more conducive to assessment oscillating aging
Effect.For deficiency existing for existing effect of vibration stress relief evaluation method, the utility model proposes one kind to be based on more strain sensings
The effect of vibration stress relief online rating system and method for device information fusion, that is, establish shaking based on the fusion of more strain transducer information
Dynamic timeliness effect online rating system, for carrying out online, reliable evaluation to effect of vibration stress relief.
Utility model content
For deficiency existing for existing effect of vibration stress relief evaluation method, the utility model proposes one kind based on more strain biographies
The effect of vibration stress relief online rating system and method for sensor information fusion are established based on the fusion of more strain transducer information
Effect of vibration stress relief online rating system, for carrying out online, reliable evaluation to effect of vibration stress relief.
Based on the effect of vibration stress relief online rating system of more strain transducer information fusion, including master system, appoint
Card, analog line driver, vibrator, strain-ga(u)ge transducer group, dynamic strain indicator, data collecting card, support device occur for waveform of anticipating；
Vibrator is fixed on the surface of workpiece, and workpiece is supported using flexible support device；
Card output amplitude and the independent and continuously adjustable sinusoidal excitation of frequency occur for master system control random waveform
Signal；The sinusoidal excitation signal that card output occurs for random waveform is input to vibrator, driving vibrator production via analog line driver
Raw vibration；
Strain-ga(u)ge transducer in strain-ga(u)ge transducer group is pasted onto on workpiece, and the foil gauge in strain-ga(u)ge transducer group passes
Sensor is connected with dynamic strain indicator, and dynamic strain indicator is connected with data collecting card, and data collecting card is connected with master system；
Master system includes the strain signal memory module that storage strain-ga(u)ge transducer group collects, based on variance contribution
The data Layer blending algorithm of rate writes module, strain signal Fusion Module, the strain signal memory module after fusion, display fusion
The display module of strain signal afterwards.
Further, dynamic strain indicator is high-precision multi-path dynamic strain indicator.
Further, support device is elastic element.
Further, the strain-ga(u)ge transducer number S included in foil gauge sensing group is positive integer, and S >=3.
The technical concept of the utility model is：By master system, random waveform occur card, analog line driver, vibrator,
Strain-ga(u)ge transducer group, dynamic strain indicator, data collecting card and support device composition are merged based on more strain transducer information
Effect of vibration stress relief online rating system.
The beneficial effects of the utility model are as follows：
1st, during parameter curve rating method evaluation effect of vibration stress relief, single acceleration transducer is only arranged on workpiece, by
It is easily disturbed in the acceleration signal that acceleration transducer acquisition is returned be subject to extraneous factor, and when acceleration transducer goes out
During existing failure, it not is the real acceleration signal of workpiece that can cause the signal that acquisition is returned, 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 utility model with multi-sensor technology and
Based on information fusion technology, building the effect of vibration stress relief online rating system based on the fusion of more strain transducer information can
Existing deficiency when overcoming traditional parameters curve rating method evaluation effect of vibration stress relief, carries out so as to fulfill to effect of vibration stress relief
Online, reliable evaluation.
2nd, carried compared to residual stress measurement method, precision stability detection method and dynamic stress criterion method, the utility model
The method gone out, which can be realized, carries out effect of vibration stress relief online, reliable evaluation.
3rd, the utility model proposes based on more strain transducer information fusion effect of vibration stress relief online rating system
And method will not generate damage when evaluating effect of vibration stress relief to workpiece, belong to lossless evaluation method.
4th, the utility model proposes based on more strain transducer information fusion effect of vibration stress relief online rating system
It when carrying out on-line evaluation to effect of vibration stress relief, is controlled by master system, without manual operation, reduces work
It measures, improves work efficiency.
5th, the utility model proposes based on more strain transducer information fusion effect of vibration stress relief online rating system
And method can be realized and online, reliable evaluation is carried out to effect of vibration stress relief, the evaluation method to study effect of vibration stress relief carries
New thinking is supplied.
Description of the drawings
The effect of vibration stress relief online rating system schematic diagram that Fig. 1 is merged based on more strain transducer information.
Data Layer Fusion Model schematic diagrames of the Fig. 2 based on variance contribution ratio.
Specific embodiment
Referring to the drawings, the utility model is further illustrated：
Based on the effect of vibration stress relief online rating system of more strain transducer information fusion, including master system, appoint
Card, analog line driver, vibrator, strain-ga(u)ge transducer group, dynamic strain indicator, data collecting card, support device occur for waveform of anticipating；
Vibrator is fixed on the surface of workpiece, and workpiece is supported using flexible support device；
Card output amplitude and the independent and continuously adjustable sinusoidal excitation of frequency occur for master system control random waveform
Signal；The sinusoidal excitation signal that card output occurs for random waveform is input to vibrator, driving vibrator production via analog line driver
Raw vibration；
Strain-ga(u)ge transducer in strain-ga(u)ge transducer group is pasted onto on workpiece, and the foil gauge in strain-ga(u)ge transducer group passes
Sensor is connected with dynamic strain indicator, and dynamic strain indicator is connected with data collecting card, and data collecting card is connected with master system；
Master system includes the strain signal memory module that storage strain-ga(u)ge transducer group collects, based on variance contribution
The data Layer blending algorithm of rate writes module, strain signal Fusion Module, the strain signal memory module after fusion, display fusion
The display module of strain signal afterwards.
Further, dynamic strain indicator is high-precision multi-path dynamic strain indicator.
Further, support device is elastic element.
Further, the strain-ga(u)ge transducer number S included in foil gauge sensing group is positive integer, and S >=3.
The sensor that the utility model uses is strain-ga(u)ge transducer, is same type sensor, therefore strain signal is only
It needs to be merged in data Layer, the utility model is using the data Layer blending algorithm based on variance contribution ratio.
If certain strain transducer collects a strain signal data of workpiece with a certain sample frequency in sampling time t
Sequence M (k), discrete k number are respectively m according to value1,m2,…,mk.Define data value miTo the data gathered in time t
The variance contribution ratio of sequence is
In formula：The respectively average of discrete signal M (k) and variance.
When having S similar strain transducers in certain time length while when gathering k strain data, if strain transducer
Q-th of data of s acquisitions are msq, according to equation (1), variance contribution ratio can be expressed as
In formula：μs、The respectively desired value and variance for the k discrete signal that s strain transducers collect.
According to the variance contribution ratio of different measuring points strain signal time data, the q number of strain transducer s acquisitions
According to msqThe fusion coefficients λ of distributionsqFor
Then the value of q points is after data fusion
Data Layer Fusion Model based on variance contribution ratio first melts S strain transducer in q-th of data point
It closes, obtains Mq, then q=1,2 ..., k are traveled through, you can with the time-history curves of signal after being merged.
Effect of vibration stress relief on-line evaluation method based on the fusion of more strain transducer information comprises the following steps：
(1), workpiece is fixedly connected with vibrator；Workpiece is supported by flexible support device, so as to
Vibrator carries out exciting to workpiece；Strain-ga(u)ge transducer in strain-ga(u)ge transducer group is pasted onto on workpiece；Connect host computer
System and random waveform block between signal link；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 vibrator；Connect strain-ga(u)ge transducer group in strain-ga(u)ge transducer with
Signal link between dynamic strain indicator；Connect the signal link between dynamic strain indicator and data collecting card；Data are connected to adopt
Signal link between truck and master system；Connect master system, card, analog line driver, exciting occur for random waveform
The power supply of device, dynamic strain indicator and data collecting card；
(2), master system control random waveform occurs to block carries out frequency sweep vibration to workpiece, so that it is determined that oscillating aging
Driving frequency；
(3), slowly adjusting the gain knob of analog line driver makes analog line driver export constant electric current, drives vibrator
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；Storage strain-ga(u)ge transducer group is collected in strain signal Fusion Module
Strain signal memory module in the strain signal that stores carry out data fusion；After the strain signal storage after fusion to fusion
Strain signal memory module, and the display module of strain signal passed through after fusion is shown；
(5), effect of vibration stress relief is evaluated using the amplitude of the strain signal after fusion, when master system is shown
Fusion after strain signal amplitude stability when, stop to workpiece carry out vibration stress relief treatment.
Content described in this specification embodiment is only enumerating to the way of realization of utility model design, this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, the scope of protection of the utility model also and
In those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (4)
1. based on the effect of vibration stress relief online rating system of more strain transducer information fusion, including master system, arbitrary
Card, analog line driver, vibrator, strain-ga(u)ge transducer group, dynamic strain indicator, data collecting card, support device occur for waveform；Swash
The device that shakes is fixed on the surface of workpiece, and workpiece is supported using flexible support device；
Card output amplitude and the independent and continuously adjustable sinusoidal excitation signal of frequency occur for master system control random waveform；
The sinusoidal excitation signal that card output occurs for random waveform is input to vibrator via analog line driver, and driving vibrator generation is shaken
It is dynamic；
Strain-ga(u)ge transducer in strain-ga(u)ge transducer group is pasted onto on workpiece, the strain-ga(u)ge transducer in strain-ga(u)ge transducer group
It is connected with dynamic strain indicator, dynamic strain indicator is connected with data collecting card, and data collecting card is connected with master system；
Master system includes the strain signal memory module that storage strain-ga(u)ge transducer group collects, based on variance contribution ratio
Data Layer blending algorithm writes module, strain signal Fusion Module, the strain signal memory module after fusion, after display fusion
The display module of strain signal.
2. the effect of vibration stress relief online rating system as described in claim 1 based on the fusion of more strain transducer information,
It is characterized in that：Dynamic strain indicator is high-precision multi-path dynamic strain indicator.
3. the effect of vibration stress relief online rating system as described in claim 1 based on the fusion of more strain transducer information,
It is characterized in that：Support device is elastic element.
4. the effect of vibration stress relief online rating system as described in claim 1 based on the fusion of more strain transducer information,
It is characterized in that：The strain-ga(u)ge transducer number S included in foil gauge sensing group is positive integer, and S >=3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721168656.XU CN207396001U (en) | 2017-09-13 | 2017-09-13 | A kind of effect of vibration stress relief online rating system based on the fusion of more strain transducer information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721168656.XU CN207396001U (en) | 2017-09-13 | 2017-09-13 | A kind of effect of vibration stress relief online rating system based on the fusion of more strain transducer information |
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| Publication Number | Publication Date |
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| CN207396001U true CN207396001U (en) | 2018-05-22 |
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| CN201721168656.XU Expired - Fee Related CN207396001U (en) | 2017-09-13 | 2017-09-13 | A kind of effect of vibration stress relief online rating system based on the fusion of more strain transducer information |
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