CN109609752A - Existing structure part oscillating aging system and method based on feedback control - Google Patents
Existing structure part oscillating aging system and method based on feedback control Download PDFInfo
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- CN109609752A CN109609752A CN201910047117.8A CN201910047117A CN109609752A CN 109609752 A CN109609752 A CN 109609752A CN 201910047117 A CN201910047117 A CN 201910047117A CN 109609752 A CN109609752 A CN 109609752A
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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
- C21D11/00—Process control or regulation for heat treatments
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Abstract
Existing structure part oscillating aging system based on feedback control includes master system, random waveform generation card, analog line driver, vibration excitor, acceleration transducer, charge amplifier, oscillograph, acoustic emission sensor, preamplifier, filter, main amplifier, data collecting card and support device.Existing structure part oscillation time-effect method based on feedback control is by comparing the sound emission signal characteristic data stored in the sound emission signal characteristic and crackle formation and the sound emission signal characteristic database extended that actual measurement obtains, when the two has the characteristics that similar, control information can be generated, is finally reached adjustment Vibration Aging Process parameter to ensure to carry out existing structure part the purpose of safe vibration stress relief treatment.Existing structure part oscillating aging system and method proposed by the present invention based on feedback control has the advantages that existing structure part can be carried out safe vibration stress relief treatment and extends the application range of oscillating aging.
Description
Technical field
The present invention relates to vibration aging technology fields, refer in particular to a kind of existing structure part oscillating aging system based on feedback control
System and method, are particularly suitable for the existing structure part containing crack defect.
Technical background
In current method for removing residual stress, vibration aging technology is since eradicating efficacy is good, energy conservation and environmental protection, is easy to existing
Operation, it is high-efficient the advantages that and by machining manufacturing technology field enterprise favor.Vibration aging technology is to utilize
The vibrational energy of input makes component generate plastic deformation, to achieve the purpose that eliminate residual stress.However structural member is manufacturing
During processing and daily operation, certain damage can be inevitably generated, so that defect is generated in material internal, it is the most typical
Be exactly in material internal to crack defect.If to it is this kind of there are the structural member of crack defect, especially existing structure part into
When row vibration stress relief treatment, the improper crack defect that may cause inside structural member of the vibrational energy of input is further expanded out
Come, even results in structural member and be broken.For existing structure part, especially shake to the existing structure part containing crack defect
When dynamic ageing treatment, it is necessary to pay close attention to state of the crack defect under oscillating load effect, and formulate Vibration Aging Process ginseng
When number, it should not spread that (i.e. crack defect can be stablized and deposit under oscillating load effect as critical condition with crack defect
Coming without further expanding), this is just needed when determining Vibration Aging Process parameter, while acquisition is able to reflect back
The signal of structural member crack defect state, and crackle defect state signal is analyzed, to formulate more reasonable vibration
Aging technique parameter is fed back the signal for being able to reflect structural member crack defect state of acquisition back to oscillating aging system
In, so that oscillating aging system forms a closed-loop control system.However, the oscillating aging system applied at present is all opened
Loop system is formulated in this way when formulating Vibration Aging Process parameter it is not intended that whether there is crack defect inside structural member
Technological parameter carries out easilying lead to structural member when vibration stress relief treatment generating certain damage (vibrational energy is excessive to cause structure
The damage of part or the too long generation accumulated damage of time of vibration), so if using current oscillating aging system to existing structure
Part, when the existing structure part especially containing crack defect carries out vibration stress relief treatment, it is easy to accelerate to split inside existing structure part
Line defect further expands, to reduce the service life of existing structure part.In conclusion being adopted using what type sensor
The signal which kind of is able to reflect structural member crack defect state collected, and by signal feedback into oscillating aging system, as vibration
The foundation that dynamic aging technique parameter is formulated, makes oscillating aging system form closed-loop control system, thus when reasonably being vibrated
Technological parameter is imitated, a current oscillating aging system critical issue in the urgent need to address in practical application is had become,
The application that seriously restrict oscillating aging system in existing structure part, especially on the existing structure part containing crack defect.
When structural member cracks during effect loaded, the phenomenon that strain energy is released in the form of elastic wave,
Referred to as sound emission.Using acoustic emission signal is received, the technology of Dynamic Non-Destruction Measurement, referred to as acoustic emission are carried out to structural member,
And acoustic emission has been widely used in detecting the formation and extension of crackle at present.And existing structure part, especially contain and splits
The existing structure part of line defect principal mode of failure damage during vibration stress relief treatment is the formation and extension of crackle, is belonged to
In typical acoustic emission source.We by acoustic emission applied to detection existing structure part it is not difficult to find that be particularly applied to contain
The existing structure part of crack defect crackle during oscillating aging whether formed and whether further expanded be it is feasible, because
Acoustic emission is introduced into current oscillating aging system in this present invention, to propose on this basis a kind of based on anti-
The existing structure part oscillating aging system and method for presenting control, can overcome existing open ring type oscillating aging system and method making
It is not intended that whether there is the deficiency of crack defect inside structural member, so that existing structure when determining Vibration Aging Process parameter
The safe vibration stress relief treatment of part, especially the existing structure part containing crack defect is possibly realized, final power-assisted oscillating aging skill
The popularization and application of art, and the research for oscillating aging system and method provides new thinking and direction.
Summary of the invention
In order to overcome existing open ring type oscillating aging system and method when formulating Vibration Aging Process parameter it is not intended that
It whether there is the deficiency of crack defect inside structural member, when the present invention proposes a kind of existing structure part vibration based on feedback control
System and method is imitated, i.e., acoustic emission is introduced into current open ring type oscillating aging system, utilizes acoustic emission sensor pair
Structural member during oscillating aging carries out non-destructive monitoring, and will analysis treated acoustic emission signal feedback to oscillating aging system
In system, and then formulation Vibration Aging Process parameter will not cause existing structure with the vibrational energy for ensuring oscillating aging system output
The formation or extension of part crack defect, that is, the crack defect for being formed to labour structural member are in-service as the feedback control type of starting point
Structural member oscillating aging system and method, using based on feedback control existing structure part oscillating aging system and method to in-service
Structural member carries out vibration stress relief treatment, enables to existing structure part, the especially safety of the existing structure part containing crack defect
Vibration stress relief treatment is possibly realized.
Existing structure part oscillating aging system based on feedback control includes master system, random waveform generation card, function
Rate driver, vibration excitor, acceleration transducer, charge amplifier, oscillograph, acoustic emission sensor, preamplifier, filtering
Device, main amplifier, data collecting card and support device；The vibration excitor is fixed on existing structure part, the in-service knot
Component is supported using flexible support device；The master system includes obtaining sound emission from data collecting card
The acoustic emission signal of the collected acoustic emission signal of sensor obtains module, sound emission signal characteristic obtains module, crackle is formed
With the sound emission signal characteristic database module, sound emission signal characteristic comparison module, control information storage module, vibration of extension
Aging process module, activation bit memory module, obtain oscilloscope display voltage waveform voltage waveform obtain module, from electricity
Voltage peak, is converted to the vibration level modulus of conversion of output vibration level by the voltage peak extraction module that voltage peak is extracted in corrugating
Block；
Master system controls random waveform and the independent and continuously adjustable sine excitation of card output amplitude and frequency occurs
Signal；The sine excitation signal of card output occurs for random waveform by analog line driver, and driving vibration excitor generates vibration；
Acceleration transducer is mounted on existing structure part, the input of the output end and charge amplifier of acceleration transducer
End connection, the output end of charge amplifier and the input terminal of oscillograph connect, and the output end of oscillograph is connect with master system；
Acoustic emission sensor is mounted on existing structure part, the input of the output end and preamplifier of acoustic emission sensor
End connection, the output end of preamplifier and the input terminal of filter connect, the input of the output end and main amplifier of filter
End connection, the output end of main amplifier and the input terminal of data collecting card connect；The output end of data collecting card and host computer system
System connection.
Further, it includes acoustic emission signal waveform characteristic parameter extraction module that the sound emission signal characteristic, which obtains module,
With the acoustic emission signal time frequency analysis module based on wavelet analysis technology；The acoustic emission signal waveform characteristic parameter extraction mould
Block is used to extract the peak swing value and RMS voltage of acoustic emission signal waveform；The sound hair based on wavelet analysis technology
Signal time frequency analysis module is penetrated for time-domain signal to be converted to frequency-region signal, obtains acoustic emission signal in the amplitude and frequency of frequency domain
Rate.
Further, the crackle is formed and the characteristics of Acoustic Emission database module of extension stores acoustic emission signal waveform
The amplitude and frequency of peak swing value and RMS voltage and acoustic emission signal in frequency domain.In specific implementation process of the present invention
In, the extraction of multiple features is carried out to the acoustic emission signal during existing structure part oscillating aging, can be improved feedback control
Precision, it is ensured that existing structure part is able to carry out safe vibration stress relief treatment.When what Vibration Aging Process parameter was formulated does not conform to
When reason, when carrying out vibration stress relief treatment under such technological parameter to existing structure part, existing structure part is easy to cause to generate
Certain damage, so that corresponding acoustic emission signal can be generated.Phase can be generated when crackle formation on existing structure part and extension
The acoustic emission signal answered, the acoustic emission signal have biggish peak swing value and RMS voltage, have in frequency domain
Higher frequency distribution range and biggish amplitude, and the crackle for not having crackle to be formed or formed on existing structure part is not
When further expanding, the acoustic emission signal has lesser peak swing value and RMS voltage, the frequency spectrum point on frequency domain
Cloth does not have frequency distribution than more gentle, and in high frequency section.
Further, the voltage waveform obtains the voltage waveform that module obtains oscilloscope display, the voltage peak
Extraction module extracts voltage peak from voltage waveform, and voltage peak is converted to output vibration level by the vibration level conversion module.
In specific implementation process of the present invention, acted on using the vibration level characterization acted on existing structure part dynamic on existing structure part
Stress.Sensitirity va1ue s (the pC/ms of acceleration transducer-2), the sensitivity coefficient S (pC/Unit) of charge amplifier input terminal,
Amplification coefficient F (Unit/V), voltage peak U (V), act on the vibration level on existing structure part and the conversion between voltage peak is closed
System isWherein a indicates the vibration level acted on existing structure part.
Further, the crackle is formed and the sound emission signal characteristic database module of extension is stored to existing structure part
The oscillating aging for carrying out haveing damage property tests accumulated magnanimity sound emission signal characteristic data；The sound emission signal characteristic
In the sound emission signal characteristic database of the formation of sound emission signal characteristic and crackle and extension that comparison module is surveyed
The sound emission signal characteristic of storage；The sound emission signal characteristic and the crackle that the actual measurement obtains are formed and the sound of extension
When the sound emission signal characteristic stored in transmitting signal characteristic database has the characteristics that similar, the sound emission signal characteristic
Comparison module can generate control information, and be stored in the control information storage module, and then control the oscillating aging
Technological parameter of the method module corrective action on existing structure part, and the oscillation time-effect method module can generate driving letter
Breath, and it is stored in the activation bit memory module, and then right under the technological parameter of vibration excitor after the adjustment described in driving
Existing structure part carries out vibration stress relief treatment, and such adjustment process is not crack the acoustic emission signal to be formed and be extended
Boundary.
Further, the oscillation time-effect method module has existing structure part and cracks the sound emission to be formed and be extended
Vibration Aging Process parameter when signal adjusts rule；The Vibration Aging Process parameter includes excited frequency, exciting vibration level
With the exciting time；The adjustment rule includes choosing lesser excited frequency in excited frequency selection range, shaking in exciting
Lesser exciting vibration level is chosen in grade selection range, the shorter exciting time is chosen in exciting time selection range.In this hair
When being concerned with the key process parameter of oscillating aging, i.e. excited frequency, exciting vibration level and exciting in bright specific implementation process
Between.When starting to carry out vibration stress relief treatment to existing structure part, according to Vibration Aging Process national standard (GB-T 25712-
2010 " Vibration Aging Process parameter selection and effective evaluation methods ") determine the choosing of excited frequency, exciting vibration level and exciting time
Range is taken, and chooses specific process parameter value in selection range and vibration stress relief treatment is carried out to existing structure part, works as selection
Vibration Aging Process parameter value it is improper when, be easy to cause existing structure part to generate certain damage, to generate corresponding
Acoustic emission signal just needs the technological parameter to existing structure part vibration stress relief treatment to be adjusted at this time.Adjusting rule includes
Lesser excited frequency is chosen in excited frequency selection range or lesser exciting vibration is chosen in exciting vibration level selection range
Grade to reduce the vibrational energy acted on existing structure part, chosen in exciting time selection range the shorter exciting time with
It avoids generating accumulated damage to existing structure part.The Vibration Aging Process parameter of existing structure part is adjusted in this way,
Damage can be generated to avoid existing structure part, it is ensured that existing structure part is able to carry out safe vibration stress relief treatment.
Further, support device is elastic element.
Further, acceleration transducer is piezoelectric acceleration transducer.
Specifically, the existing structure part oscillating aging system implementation process proposed by the present invention based on feedback control is such as
Under:
In specific implementation process of the present invention, existing structure is acted on using the vibration level characterization acted on existing structure part
Dynamic stress on part is first depending on the selection range that Vibration Aging Process national standard determines oscillating aging excited frequency, determines
The selection range of oscillating aging exciting vibration level, determines the selection range of oscillating aging exciting time, then excited frequency and swash
The vibration level selection range that shakes is interior to choose specific process parameter value to existing structure part progress vibration stress relief treatment, swashs when in determining
When carrying out vibration stress relief treatment to existing structure part under vibration frequency and exciting vibration level, the vibration on the existing structure part is acted on
It is easy to cause existing structure part to form crackle when energy is excessive or causes already existing crackle on existing structure part further
Extension can generate corresponding sound hair when carrying out vibration stress relief treatment under the effect of excessive vibrational energy so as to cause existing structure part
Signal is penetrated, or the vibration stress relief treatment for carrying out the long period to existing structure part generates accumulated damage, to can also generate phase
The acoustic emission signal answered carries out feature extraction to acoustic emission signal at this time, and the acoustic emission signal for being formed and being extended with crackle is special
The oscillating aging for carrying out haveing damage property to existing structure part for levying database module storage is tested accumulated magnanimity sound emission and is believed
Number characteristic is compared, if the acoustic emission signal that sound emission signal characteristic and crackle that actual measurement obtains are formed and extended is special
The sound emission signal characteristic data that store have the characteristics that similar in sign database, show to shake under such technological parameter
When dynamic ageing treatment, the damage of existing structure part can be accelerated, sound emission signal characteristic comparison module can generate control information at this time,
To which oscillation time-effect method module can the technological parameter (vibration of the corrective action on existing structure part according to the control information
Aging process module has Vibration Aging Process parameter adjustment rule when existing structure part generates acoustic emission signal, the tune
Whole rule include chosen in excited frequency selection range lesser excited frequency, choose in exciting vibration level selection range it is smaller
Exciting vibration level, the shorter exciting time is chosen in exciting time selection range.In excited frequency selection range choose compared with
Small excited frequency is chosen lesser exciting vibration level in exciting vibration level selection range and be can reduce and acts on existing structure
Vibrational energy on part, it is tired to avoid generating to existing structure part that the shorter exciting time is chosen in exciting time selection range
Product damage.), and generate and shake under the technological parameter of corresponding activation bit driving vibration excitor after the adjustment to existing structure part
Dynamic ageing treatment, such adjustment process to be formed and the acoustic emission signal that extends is boundary using not cracking, so that it is guaranteed that energy
Enough vibration stress relief treatments that safety is carried out to existing structure part.It can be generated when crackle formation on existing structure part and extension corresponding
Acoustic emission signal, the acoustic emission signal have biggish peak swing value and RMS voltage, in frequency domain have compared with
High frequency distribution range and biggish amplitude, and do not have on existing structure part crackle formed or the crackle that has been formed not into
When one step extends, the acoustic emission signal has lesser peak swing value and RMS voltage, the spectrum distribution on frequency domain
There is no frequency distribution than more gentle, and in high frequency section.Sound emission signal characteristic that the actual measurement obtains and crackle formed and
The sound emission signal characteristic data stored in the sound emission signal characteristic database of extension have the characteristics that similar to refer to reality
The acoustic emission signal measured has biggish peak swing value and RMS voltage, the frequency distribution model with higher in frequency domain
It encloses and biggish amplitude, sound emission signal characteristic in this way compares, split to determine whether to be formed on existing structure part
Whether there is or not further extensions for line or the crackle formed.
Existing structure part oscillation time-effect method based on feedback control the following steps are included:
(1), existing structure part is fixedly connected with vibration excitor；By flexible support device to existing structure part into
Row support, so that vibration excitor carries out exciting processing to existing structure part；Acceleration transducer and acoustic emission sensor are mounted on
On existing structure part；Connect signal link；Power on；
(2), according to Vibration Aging Process national standard, the selection range of Vibration Aging Process parameter, including determination are determined
The selection range of existing structure part oscillating aging excited frequency, the selection model for determining existing structure part oscillating aging exciting vibration level
Enclose, determine the selection range of existing structure part oscillating aging exciting time；
(3), carry out the vibration stress relief treatment of haveing damage property to existing structure part, the acoustic emission signal in master system is special
Sign obtains module and extracts the feature of collected acoustic emission signal, and obtained magnanimity sound emission signal characteristic data storage is arrived
In the sound emission signal characteristic database of crackle formation and extension；
(4), chosen in the selection range of Vibration Aging Process parameter specific process parameter value to existing structure part into
Row vibration stress relief treatment；
(5), acoustic emission sensor is monitored existing structure part oscillating aging process, if the sound emission that actual measurement obtains
The sound emission signal characteristic data stored in the sound emission signal characteristic database that signal characteristic is formed and extended with crackle have
When similar feature, the sound emission signal characteristic comparison module in master system can generate control information, control oscillating aging
Technological parameter of the method module corrective action on existing structure part, and oscillation time-effect method module can generate activation bit, drive
Vibration stress relief treatment is carried out to existing structure part under the technological parameter of dynamic vibration excitor after the adjustment, such adjustment process is not to produce
Raw crackle is formed and the acoustic emission signal of extension is boundary.
Further, the signal link includes the signal link between master system and random waveform generation card；Appoint
Signal link between card and analog line driver occurs for waveform of anticipating；Signal link between analog line driver and vibration excitor；Accelerate
Spend the signal link between sensor and charge amplifier；Signal link between charge amplifier and oscillograph；Oscillograph with
Signal link between master system；Signal link between acoustic emission sensor and preamplifier；Preamplifier with
Signal link between filter；Signal link between filter and main amplifier；Between main amplifier and data collecting card
Signal link；Signal link between data collecting card and master system；The power supply includes master system, any
Card, analog line driver, vibration excitor, charge amplifier, oscillograph, preamplifier, filter, main amplifier sum number occur for waveform
According to the power supply of capture card.
Beneficial effects of the present invention are as follows:
1, the existing structure part oscillating aging system and method proposed by the present invention based on feedback control uses sound emission skill
Art is monitored oscillating aging process, belongs to lossless detection method.
2, the existing structure part oscillating aging system and method proposed by the present invention based on feedback control uses sound emission skill
Art is monitored oscillating aging process, and acoustic emission belongs to a kind of dynamic real-time monitor technology, can find in real time and
The formation and development process of monitoring crack, unlike other conventional lossless detection means are that occur in subsequent detection just in crack defect
It can find, accordingly ensure that the existing structure part oscillating aging system and side proposed by the present invention based on feedback control can be used
Method carries out the vibration stress relief treatment of safety to existing structure part.
3, the existing structure part oscillating aging system and method proposed by the present invention based on feedback control belongs to closed-loop control
Oscillating aging system, be by acoustic emission signal feedback into current open ring type oscillating aging system, and then formulate oscillating aging
Technological parameter is to ensure that the vibrational energy of oscillating aging system output will not cause the formation or expansion of existing structure part crack defect
Exhibition, that is, be formed to labour structural member crack defect as starting point feedback control type existing structure part oscillating aging system and
Method is conducive to the application range for extending oscillating aging.
4, the existing structure part oscillating aging system and method proposed by the present invention based on feedback control is to existing structure part
When carrying out vibration stress relief treatment, treatment process is controlled by master system, reduces the workload of operator,
Be conducive to improve the efficiency of vibration stress relief treatment.
5, the existing structure part oscillating aging system and method proposed by the present invention based on feedback control is not only to in-service knot
Component is effective, while also can be applied to after the completion of processing and manufacturing carry out eliminating the structural member that residual stress is handled, because
Traditional oscillating aging system and method is when carrying out vibration stress relief treatment to structural member, it is not intended that whether structural member will form
Whether crackle or the crackle formed can further expand, this be also why existing open ring type oscillating aging system and side
Method will appear the root for reducing structural member performance, and the existing structure proposed by the present invention based on feedback control in application process
Part oscillating aging system and method, when by the fusion of the acoustic emission with dynamic real-time monitor, open ring type vibrates till now
It imitates in system and method, forms the existing structure part oscillating aging system of the feedback control using acoustic emission signal as feedback information
And method, it can be ensured that structural member carry out safety vibration stress relief treatment, and it is proposed by the present invention based on feedback control
Labour structural member oscillating aging system and method can provide new thinking and direction for the research of oscillating aging system and method.
Detailed description of the invention
Existing structure part oscillating aging system schematic diagram of the Fig. 1 based on feedback control.
Existing structure part oscillation time-effect method schematic diagram of the Fig. 2 based on feedback control.
Specific embodiment
Referring to attached drawing, the present invention is further illustrated:
Existing structure part oscillating aging system based on feedback control includes master system, random waveform generation card, function
Rate driver, vibration excitor, acceleration transducer, charge amplifier, oscillograph, acoustic emission sensor, preamplifier, filtering
Device, main amplifier, data collecting card and support device；The vibration excitor is fixed on existing structure part, the in-service knot
Component is supported using flexible support device；The master system includes obtaining sound emission from data collecting card
The acoustic emission signal of the collected acoustic emission signal of sensor obtains module, sound emission signal characteristic obtains module, crackle is formed
With the sound emission signal characteristic database module, sound emission signal characteristic comparison module, control information storage module, vibration of extension
Aging process module, activation bit memory module, obtain oscilloscope display voltage waveform voltage waveform obtain module, from electricity
Voltage peak, is converted to the vibration level modulus of conversion of output vibration level by the voltage peak extraction module that voltage peak is extracted in corrugating
Block；
Master system controls random waveform and the independent and continuously adjustable sine excitation of card output amplitude and frequency occurs
Signal；The sine excitation signal of card output occurs for random waveform by analog line driver, and driving vibration excitor generates vibration；
Acceleration transducer is mounted on existing structure part, the input of the output end and charge amplifier of acceleration transducer
End connection, the output end of charge amplifier and the input terminal of oscillograph connect, and the output end of oscillograph is connect with master system；
Acoustic emission sensor is mounted on existing structure part, the input of the output end and preamplifier of acoustic emission sensor
End connection, the output end of preamplifier and the input terminal of filter connect, the input of the output end and main amplifier of filter
End connection, the output end of main amplifier and the input terminal of data collecting card connect；The output end of data collecting card and host computer system
System connection.
Further, it includes acoustic emission signal waveform characteristic parameter extraction module that the sound emission signal characteristic, which obtains module,
With the acoustic emission signal time frequency analysis module based on wavelet analysis technology；The acoustic emission signal waveform characteristic parameter extraction mould
Block is used to extract the peak swing value and RMS voltage of acoustic emission signal waveform；The sound hair based on wavelet analysis technology
Signal time frequency analysis module is penetrated for time-domain signal to be converted to frequency-region signal, obtains acoustic emission signal in the amplitude and frequency of frequency domain
Rate.
Further, the crackle is formed and the characteristics of Acoustic Emission database module of extension stores acoustic emission signal waveform
The amplitude and frequency of peak swing value and RMS voltage and acoustic emission signal in frequency domain.In specific implementation process of the present invention
In, the extraction of multiple features is carried out to the acoustic emission signal during existing structure part oscillating aging, can be improved feedback control
Precision, it is ensured that existing structure part is able to carry out safe vibration stress relief treatment.When what Vibration Aging Process parameter was formulated does not conform to
When reason, when carrying out vibration stress relief treatment under such technological parameter to existing structure part, existing structure part is easy to cause to generate
Certain damage, so that corresponding acoustic emission signal can be generated.Phase can be generated when crackle formation on existing structure part and extension
The acoustic emission signal answered, the acoustic emission signal have biggish peak swing value and RMS voltage, have in frequency domain
Higher frequency distribution range and biggish amplitude, and the crackle for not having crackle to be formed or formed on existing structure part is not
When further expanding, the acoustic emission signal has lesser peak swing value and RMS voltage, the frequency spectrum point on frequency domain
Cloth does not have frequency distribution than more gentle, and in high frequency section.
Further, the voltage waveform obtains the voltage waveform that module obtains oscilloscope display, the voltage peak
Extraction module extracts voltage peak from voltage waveform, and voltage peak is converted to output vibration level by the vibration level conversion module.
In specific implementation process of the present invention, acted on using the vibration level characterization acted on existing structure part dynamic on existing structure part
Stress.Sensitirity va1ue s (the pC/ms of acceleration transducer-2), the sensitivity coefficient S (pC/Unit) of charge amplifier input terminal,
Amplification coefficient F (Unit/V), voltage peak U (V), act on the vibration level on existing structure part and the conversion between voltage peak is closed
System isWherein a indicates the vibration level acted on existing structure part.
Further, the crackle is formed and the sound emission signal characteristic database module of extension is stored to existing structure part
The oscillating aging for carrying out haveing damage property tests accumulated magnanimity sound emission signal characteristic data；The sound emission signal characteristic
In the sound emission signal characteristic database of the formation of sound emission signal characteristic and crackle and extension that comparison module is surveyed
The sound emission signal characteristic of storage；The sound emission signal characteristic and the crackle that the actual measurement obtains are formed and the sound of extension
When the sound emission signal characteristic stored in transmitting signal characteristic database has the characteristics that similar, the sound emission signal characteristic
Comparison module can generate control information, and be stored in the control information storage module, and then control the oscillating aging
Technological parameter of the method module corrective action on existing structure part, and the oscillation time-effect method module can generate driving letter
Breath, and it is stored in the activation bit memory module, and then right under the technological parameter of vibration excitor after the adjustment described in driving
Existing structure part carries out vibration stress relief treatment, and such adjustment process is not crack the acoustic emission signal to be formed and be extended
Boundary.
Further, the oscillation time-effect method module has existing structure part and cracks the sound emission to be formed and be extended
Vibration Aging Process parameter when signal adjusts rule；The Vibration Aging Process parameter includes excited frequency, exciting vibration level
With the exciting time；The adjustment rule includes choosing lesser excited frequency in excited frequency selection range, shaking in exciting
Lesser exciting vibration level is chosen in grade selection range, the shorter exciting time is chosen in exciting time selection range.In this hair
When being concerned with the key process parameter of oscillating aging, i.e. excited frequency, exciting vibration level and exciting in bright specific implementation process
Between.When starting to carry out vibration stress relief treatment to existing structure part, according to Vibration Aging Process national standard (GB-T 25712-
2010 " Vibration Aging Process parameter selection and effective evaluation methods ") determine the choosing of excited frequency, exciting vibration level and exciting time
Range is taken, and chooses specific process parameter value in selection range and vibration stress relief treatment is carried out to existing structure part, works as selection
Vibration Aging Process parameter value it is improper when, be easy to cause existing structure part to generate certain damage, to generate corresponding
Acoustic emission signal just needs the technological parameter to existing structure part vibration stress relief treatment to be adjusted at this time.Adjusting rule includes
Lesser excited frequency is chosen in excited frequency selection range or lesser exciting vibration is chosen in exciting vibration level selection range
Grade to reduce the vibrational energy acted on existing structure part, chosen in exciting time selection range the shorter exciting time with
It avoids generating accumulated damage to existing structure part.The Vibration Aging Process parameter of existing structure part is adjusted in this way,
Damage can be generated to avoid existing structure part, it is ensured that existing structure part is able to carry out safe vibration stress relief treatment.
Further, support device is elastic element.
Further, acceleration transducer is piezoelectric acceleration transducer.
Specifically, the existing structure part oscillating aging system implementation process proposed by the present invention based on feedback control is such as
Under:
In specific implementation process of the present invention, existing structure is acted on using the vibration level characterization acted on existing structure part
Dynamic stress on part is first depending on the selection range that Vibration Aging Process national standard determines oscillating aging excited frequency, determines
The selection range of oscillating aging exciting vibration level, determines the selection range of oscillating aging exciting time, then excited frequency and swash
The vibration level selection range that shakes is interior to choose specific process parameter value to existing structure part progress vibration stress relief treatment, swashs when in determining
When carrying out vibration stress relief treatment to existing structure part under vibration frequency and exciting vibration level, the vibration on the existing structure part is acted on
It is easy to cause existing structure part to form crackle when energy is excessive or causes already existing crackle on existing structure part further
Extension can generate corresponding sound hair when carrying out vibration stress relief treatment under the effect of excessive vibrational energy so as to cause existing structure part
Signal is penetrated, or the vibration stress relief treatment for carrying out the long period to existing structure part generates accumulated damage, to can also generate phase
The acoustic emission signal answered carries out feature extraction to acoustic emission signal at this time, and the acoustic emission signal for being formed and being extended with crackle is special
The oscillating aging for carrying out haveing damage property to existing structure part for levying database module storage is tested accumulated magnanimity sound emission and is believed
Number characteristic is compared, if the acoustic emission signal that sound emission signal characteristic and crackle that actual measurement obtains are formed and extended is special
The sound emission signal characteristic data that store have the characteristics that similar in sign database, show to shake under such technological parameter
When dynamic ageing treatment, the damage of existing structure part can be accelerated, sound emission signal characteristic comparison module can generate control information at this time,
To which oscillation time-effect method module can the technological parameter (vibration of the corrective action on existing structure part according to the control information
Aging process module has Vibration Aging Process parameter adjustment rule when existing structure part generates acoustic emission signal, the tune
Whole rule include chosen in excited frequency selection range lesser excited frequency, choose in exciting vibration level selection range it is smaller
Exciting vibration level, the shorter exciting time is chosen in exciting time selection range.In excited frequency selection range choose compared with
Small excited frequency is chosen lesser exciting vibration level in exciting vibration level selection range and be can reduce and acts on existing structure
Vibrational energy on part, it is tired to avoid generating to existing structure part that the shorter exciting time is chosen in exciting time selection range
Product damage.), and generate and shake under the technological parameter of corresponding activation bit driving vibration excitor after the adjustment to existing structure part
Dynamic ageing treatment, such adjustment process to be formed and the acoustic emission signal that extends is boundary using not cracking, so that it is guaranteed that energy
Enough vibration stress relief treatments that safety is carried out to existing structure part.It can be generated when crackle formation on existing structure part and extension corresponding
Acoustic emission signal, the acoustic emission signal have biggish peak swing value and RMS voltage, in frequency domain have compared with
High frequency distribution range and biggish amplitude, and do not have on existing structure part crackle formed or the crackle that has been formed not into
When one step extends, the acoustic emission signal has lesser peak swing value and RMS voltage, the spectrum distribution on frequency domain
There is no frequency distribution than more gentle, and in high frequency section.Sound emission signal characteristic that the actual measurement obtains and crackle formed and
The sound emission signal characteristic data stored in the sound emission signal characteristic database of extension have the characteristics that similar to refer to reality
The acoustic emission signal measured has biggish peak swing value and RMS voltage, the frequency distribution model with higher in frequency domain
It encloses and biggish amplitude, sound emission signal characteristic in this way compares, split to determine whether to be formed on existing structure part
Whether there is or not further extensions for line or the crackle formed.
Existing structure part oscillation time-effect method based on feedback control the following steps are included:
(1), existing structure part is fixedly connected with vibration excitor；By flexible support device to existing structure part into
Row support, so that vibration excitor carries out exciting processing to existing structure part；Acceleration transducer and acoustic emission sensor are mounted on
On existing structure part；Connect signal link；Power on；
(2), according to Vibration Aging Process national standard, the selection range of Vibration Aging Process parameter, including determination are determined
The selection range of existing structure part oscillating aging excited frequency, the selection model for determining existing structure part oscillating aging exciting vibration level
Enclose, determine the selection range of existing structure part oscillating aging exciting time；
(3), carry out the vibration stress relief treatment of haveing damage property to existing structure part, the acoustic emission signal in master system is special
Sign obtains module and extracts the feature of collected acoustic emission signal, and obtained magnanimity sound emission signal characteristic data storage is arrived
In the sound emission signal characteristic database of crackle formation and extension；
(4), chosen in the selection range of Vibration Aging Process parameter specific process parameter value to existing structure part into
Row vibration stress relief treatment；
(5), acoustic emission sensor is monitored existing structure part oscillating aging process, if the sound emission that actual measurement obtains
The sound emission signal characteristic data stored in the sound emission signal characteristic database that signal characteristic is formed and extended with crackle have
When similar feature, the sound emission signal characteristic comparison module in master system can generate control information, control oscillating aging
Technological parameter of the method module corrective action on existing structure part, and oscillation time-effect method module can generate activation bit, drive
Vibration stress relief treatment is carried out to existing structure part under the technological parameter of dynamic vibration excitor after the adjustment, such adjustment process is not to produce
Raw crackle is formed and the acoustic emission signal of extension is boundary.
Further, the signal link includes the signal link between master system and random waveform generation card；Appoint
Signal link between card and analog line driver occurs for waveform of anticipating；Signal link between analog line driver and vibration excitor；Accelerate
Spend the signal link between sensor and charge amplifier；Signal link between charge amplifier and oscillograph；Oscillograph with
Signal link between master system；Signal link between acoustic emission sensor and preamplifier；Preamplifier with
Signal link between filter；Signal link between filter and main amplifier；Between main amplifier and data collecting card
Signal link；Signal link between data collecting card and master system；The power supply includes master system, any
Card, analog line driver, vibration excitor, charge amplifier, oscillograph, preamplifier, filter, main amplifier sum number occur for waveform
According to the power supply of capture card.
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 (9)
1. the existing structure part oscillating aging system based on feedback control includes master system, random waveform generation card, power
Driver, vibration excitor, acceleration transducer, charge amplifier, oscillograph, acoustic emission sensor, preamplifier, filter,
Main amplifier, data collecting card and support device；The vibration excitor is fixed on existing structure part, the existing structure part
It is supported using flexible support device；The master system includes obtaining voice sending sensor from data collecting card
The acoustic emission signal of the collected acoustic emission signal of device obtains module, sound emission signal characteristic obtains module, crackle is formed and expands
The sound emission signal characteristic database module of exhibition, sound emission signal characteristic comparison module, control information storage module, oscillating aging
Method module, activation bit memory module, obtain oscilloscope display voltage waveform voltage waveform obtain module, from voltage wave
Voltage peak, is converted to the vibration level conversion module of output vibration level by the voltage peak extraction module that voltage peak is extracted in shape；
Master system controls random waveform and the independent and continuously adjustable sine excitation signal of card output amplitude and frequency occurs；
The sine excitation signal of card output occurs for random waveform by analog line driver, and driving vibration excitor generates vibration；
Acceleration transducer is mounted on existing structure part, and the output end of acceleration transducer and the input terminal of charge amplifier connect
It connects, the output end of charge amplifier and the input terminal of oscillograph connect, and the output end of oscillograph is connect with master system；
Acoustic emission sensor is mounted on existing structure part, and the output end of acoustic emission sensor and the input terminal of preamplifier connect
It connects, the output end of preamplifier and the input terminal of filter connect, and the output end of filter and the input terminal of main amplifier connect
It connects, the output end of main amplifier and the input terminal of data collecting card connect；The output end and master system of data collecting card connect
It connects.
2. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: institute
It includes acoustic emission signal waveform characteristic parameter extraction module and based on wavelet analysis skill that the sound emission signal characteristic stated, which obtains module,
The acoustic emission signal time frequency analysis module of art；The acoustic emission signal waveform characteristic parameter extraction module is for extracting sound emission
The peak swing value and RMS voltage of signal waveform；The acoustic emission signal time frequency analysis mould based on wavelet analysis technology
Block is used to being converted to time-domain signal into frequency-region signal, obtains acoustic emission signal in the amplitude and frequency of frequency domain.
3. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: institute
The crackle stated is formed and the peak swing value of the characteristics of Acoustic Emission database module of extension storage acoustic emission signal waveform and effectively
The amplitude and frequency of threshold voltage and acoustic emission signal in frequency domain.
4. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: institute
The voltage waveform stated obtains the voltage waveform that module obtains oscilloscope display, and the voltage peak extraction module is from voltage waveform
Voltage peak is converted to output vibration level by middle extraction voltage peak, the vibration level conversion module；Using acting on existing structure
Vibration level characterization on part acts on the dynamic stress on existing structure part.
5. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: institute
The crackle stated is formed and the sound emission signal characteristic database module of extension stores the vibration for carrying out haveing damage property to existing structure part
Dynamic timeliness tests accumulated magnanimity sound emission signal characteristic data；The sound emission signal characteristic comparison module actual measurement
Obtained sound emission signal characteristic and crackle formation and the acoustic emission signal stored in the sound emission signal characteristic database extended
Feature；The sound emission signal characteristic and the crackle that the actual measurement obtains are formed and the sound emission signal characteristic data of extension
When the sound emission signal characteristic stored in library has the characteristics that similar, the sound emission signal characteristic comparison module can generate control
Information processed, and it is stored in the control information storage module, and then control the oscillation time-effect method module corrective action
Technological parameter on existing structure part, and the oscillation time-effect method module can generate activation bit, and be stored in described
Activation bit memory module, and then drive and shake under the technological parameter of the vibration excitor after the adjustment to existing structure part
Dynamic ageing treatment, such adjustment process to be formed and the acoustic emission signal that extends is boundary using not cracking.
6. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: institute
The oscillation time-effect method module stated have existing structure part crack to be formed and extend acoustic emission signal when oscillating aging
Technical arrangement plan rule；The Vibration Aging Process parameter includes excited frequency, exciting vibration level and exciting time；Described
Adjustment rule include chosen in excited frequency selection range lesser excited frequency, in exciting vibration level selection range choose compared with
Small exciting vibration level chooses the shorter exciting time in exciting time selection range.
7. such as realizing the existing structure part oscillating aging system described in claim 1 based on feedback control, it is characterised in that: branch
Support arrangement is elastic element, and acceleration transducer is piezoelectric acceleration transducer.
8. using the existing structure part oscillating aging system based on feedback control as described in claim 1-7, to existing structure
Part carry out vibration stress relief treatment method the following steps are included:
(1), existing structure part is fixedly connected with vibration excitor；Existing structure part is propped up by flexible support device
Support, so that vibration excitor carries out exciting processing to existing structure part；Acceleration transducer is mounted on acoustic emission sensor in-service
On structural member；Connect signal link；Power on；
(2), according to Vibration Aging Process national standard, the selection range of Vibration Aging Process parameter is determined, including determination is in-service
The selection range of structural member oscillating aging excited frequency, the selection range for determining existing structure part oscillating aging exciting vibration level, really
It is scheduled on the selection range of labour structural member oscillating aging exciting time；
(3), carry out the vibration stress relief treatment of haveing damage property to existing structure part, the sound emission signal characteristic in master system obtains
Modulus block extracts the feature of collected acoustic emission signal, and obtained magnanimity sound emission signal characteristic data are stored to crackle
In the sound emission signal characteristic database of formation and extension；
(4), specific process parameter value is chosen in the selection range of Vibration Aging Process parameter to shake to existing structure part
Dynamic ageing treatment；
(5), acoustic emission sensor is monitored existing structure part oscillating aging process, if the acoustic emission signal that actual measurement obtains
The sound emission signal characteristic data stored in feature and the sound emission signal characteristic database that crackle is formed and extended have similar
The characteristics of when, the sound emission signal characteristic comparison module in master system can generate control information, control oscillation time-effect method
Technological parameter of the module corrective action on existing structure part, and oscillation time-effect method module can generate activation bit, driving swashs
Vibration stress relief treatment is carried out to existing structure part under the technological parameter of vibration device after the adjustment, such adjustment process is split not generate
Line is formed and the acoustic emission signal of extension is boundary.
9. method according to claim 8, it is characterised in that: the signal link includes master system and random waveform
The signal link between card occurs；Signal link between card and analog line driver occurs for random waveform；Analog line driver and swash
Signal link between vibration device；Signal link between acceleration transducer and charge amplifier；Charge amplifier and oscillograph
Between signal link；Signal link between oscillograph and master system；Between acoustic emission sensor and preamplifier
Signal link；Signal link between preamplifier and filter；Signal link between filter and main amplifier；It is main
Signal link between amplifier and data collecting card；Signal link between data collecting card and master system；Described
Power supply includes master system, random waveform generation card, analog line driver, vibration excitor, charge amplifier, oscillograph, preceding storing
The power supply of device, filter, main amplifier and data collecting card greatly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910047117.8A CN109609752A (en) | 2019-01-18 | 2019-01-18 | Existing structure part oscillating aging system and method based on feedback control |
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| CN201910047117.8A CN109609752A (en) | 2019-01-18 | 2019-01-18 | Existing structure part oscillating aging system and method based on feedback control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166943A (en) * | 2021-12-03 | 2022-03-11 | 四川西南交大铁路发展股份有限公司 | Active rail damage monitoring method and terminal based on nonlinear ultrasonic waves |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166943A (en) * | 2021-12-03 | 2022-03-11 | 四川西南交大铁路发展股份有限公司 | Active rail damage monitoring method and terminal based on nonlinear ultrasonic waves |
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Application publication date: 20190412 |