CN107290118A - Shake-table test comparison method and data acquisition device based on resonant frequency - Google Patents
Shake-table test comparison method and data acquisition device based on resonant frequency Download PDFInfo
- Publication number
- CN107290118A CN107290118A CN201710677085.0A CN201710677085A CN107290118A CN 107290118 A CN107290118 A CN 107290118A CN 201710677085 A CN201710677085 A CN 201710677085A CN 107290118 A CN107290118 A CN 107290118A
- Authority
- CN
- China
- Prior art keywords
- shake
- resonant frequency
- column
- test comparison
- table test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 14
- 238000013480 data collection Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 230000003116 impacting effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 23
- 238000013461 design Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101100188554 Arabidopsis thaliana OCT5 gene Proteins 0.000 description 1
- 206010017472 Fumbling Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of shake-table test comparison method and data acquisition device based on resonant frequency.The data acquisition device includes control device and the comparison sample being connected by sensing device with control device；Comparing sample includes base, the column being arranged on base and the crossbeam being arranged on column；Wherein, the lower end of column is arranged at the position of centre of gravity of base；The upper end of column makes column and crossbeam formation T-type structure with being connected in the middle part of crossbeam；Sensing device includes monitoring sensor, the first control sensor and the second control sensor；Wherein, monitoring sensor is arranged at one end end of crossbeam；First control sensor and the second control sensor are arranged on base and on column Central Symmetry.The data acquisition device of the present invention employs the comparison sample simple in construction but reliable and stable of base, the column being arranged on base and the crossbeam being arranged on column composition, it is possible to reduce it to comparison result to impacting.
Description
Technical field
The present invention relates to laboratory capabilities assessment of levels technical field, concretely relate to a kind of based on resonant frequency
Shake-table test comparison method and data acquisition device.
Background technology
Contrasting between laboralories refer to according to predetermined condition, by two or more laboratories to same or similar comparison sample
Product are monitored tissue, implement and evaluate, and are arranged for recognizing laboratory system deviation that may be present and formulating corresponding correct
Apply, realize quality improvement, further obtain outside trust, with significantly acting on.
At present, what domestic contrasting between laboralories development was more is that humid test is compared, and more typical is Chinese conformity assessment
Approve that the humid test of committee orgaization is compared, it is the temperature controller connection that pilot lab pre-sets temperature value that it, which compares sample,
Neon lamp, Reference Lab is connected to after comparison sample, will be compared sample and is put into temperature test chamber, in temperature test chamber temperature change process
In, when temperature reaches preset temperature, the sensing using temperature controller to temperature change, by the break-make of temperature controller, control circuit
Break-make, through the shinny of neon lamp and extinguishing, reads the temperature value of instantaneous temperature chamber, the temperature value, which is used as to compare, analyzes number
According to.The comparison method is from people, machine, material, method, ring, the uncertainty for surveying measurement from the aspect of six, the measurement result energy of collection
Enough true reflection laboratory levels, it is representative.
Vibration test is, in laboratory simulation sample actual installation, use environment, to apply correspondence vibration stress, examine sample
Applicability in the present context.The simulated environment that laboratory is provided should reproducing samples actual installation, use environment, and really as far as possible
Protect that to apply vibration stress consistent with experimental condition, to accomplish this put with regard to and laboratory level have a direct relation, how evaluation experimental
Room level, Utilization assessment result is improved to process of the test, lifts industry level, is worth research.Vibration test is compared in state
The stage of fumbling is inside still in, actual development is less, its difficult point is comparing sample design, comparison method selection, data acquisition and place
In terms of reason.
The content of the invention
For the deficiency of prior art, compare other side the invention provides a kind of shake-table test based on resonant frequency
Method and data acquisition device.
Wherein, the particular technique side of the shake-table test comparison data harvester of the invention based on resonant frequency
Case is as follows：
A kind of shake-table test comparison data harvester based on resonant frequency, it includes control device and passed through
The comparison sample that sensing device is connected with the control device；The comparison sample includes base, is arranged on the base
Column and the crossbeam that is arranged on the column；Wherein, the lower end of the column is arranged at the position of centre of gravity of the base；
The upper end of the column makes the column and the crossbeam one T-type structure of formation with being connected in the middle part of the crossbeam；It is described to pass
Induction device includes monitoring sensor, the first control sensor and the second control sensor；Wherein, the monitoring sensor is arranged at
One end end of the crossbeam；It is described first control sensor and it is described second control sensor be arranged on the base and
On the column Central Symmetry.
Because each free degree component intrinsic frequency interacts in complicated comparison sample, comparison result may be made
Into influence, therefore present invention employs base, the column being arranged on the base and the crossbeam group being arranged on the column
Into comparison sample simple in construction but reliable and stable, it is possible to reduce it to comparison result to impacting；
And the comparison sample of the present invention is mounted directly on a vibration table, comparison sample and vibration should can be as far as possible reduced
Transferred between platform, it can be ensured that shake table value is accurately delivered to comparison sample, and gathered data is more reasonable；
In addition, controlling sensor by the first control sensor that will be connected with control device and second with described vertical
The centrosymmetric mode of post is arranged on base, and monitoring sensor is arranged to one end end of the crossbeam, can be more accurate
Collection test data；
Through actual measurement, the shake-table test comparison data harvester gathered data of the invention based on resonant frequency is true
It is real, reliable, it can accurately be used for comparison result analysis.
According to one preferred embodiment, multiple mounting holes are provided with the base；In the mounted state, it is multiple
Installation bolt is connected through multiple mounting holes with the moving-coil of laboratory internal vibration platform, makes the reality based on resonant frequency
Room vibration test comparison data harvester is tested to be rigidly fixed on the shake table, and the experiment based on resonant frequency
The center of gravity and the axis of the shake table of room vibration test comparison data harvester coincide.
According to one preferred embodiment, the connection pretightning force between the moving-coil of the installation bolt and the shake table
For 45N.m.
According to one preferred embodiment, the monitoring sensor is miniature monitoring sensor, to mitigate the prison
Survey the weight of sensor.
According to one preferred embodiment, the control device is control computer.
Wherein, the concrete technical scheme of the shake-table test comparison method of the invention based on resonant frequency is as follows：
A kind of shake-table test comparison method based on resonant frequency, it comprises the following steps：
(1) pilot lab and at least two Reference Labs are provided；
(2) the shake-table test comparison data harvester as described above based on resonant frequency is provided；
(3) circuit compared by the data acquisition device by circular ring type, star formula or petal type gathers described leading
Laboratory and the resonance frequency data of the Reference Lab；
(4) resonance frequency data in all laboratories by Z than fraction method to collecting is handled, and obtains processing knot
Really；And then the ability of judgment experiment room.
According to one preferred embodiment, the shake-table test comparison method based on resonant frequency is specifically wrapped
Include following steps：
A. the shake-table test comparison data based on resonant frequency is installed in the pilot lab to adopt
Acquisition means, have recorded experimental condition and result of the test；
B. the same data acquisition device and identical experimental condition in the step A are used, by circular ring type, star
The circuit that formula or petal type are compared completes experiment and log in all reference experiments rooms；
C. the result of the test obtained in the step A and the step B is handled by Z than fraction method progress；
D. according to the result of the step C, the ability in each laboratory is judged.
According to one preferred embodiment, in the step (1), the pilot lab is top experiment in industry
Room；The Reference Lab is military or civilian laboratory representative in industry.
Compared with prior art, the present invention has the advantages that：
Because each free degree component intrinsic frequency interacts in complicated comparison sample, comparison result may be made
The shake-table test comparison data harvester based on resonant frequency into influence, therefore the present invention employs base, set
It is placed in the comparison sample simple in construction but reliable and stable of the column on the base and the crossbeam composition being arranged on the column
Product, it is possible to reduce it to comparison result to impacting；And the comparison sample of the present invention is mounted directly on a vibration table, can be with
It should as far as possible reduce and be transferred between comparison sample and shake table, it can be ensured that shake table value is accurately delivered to comparison sample, adopts
Collect data more reasonable.In addition, by will be connected with control device first control sensor and second control sensor with
The centrosymmetric mode of column is arranged on base, will be monitored sensor and is arranged at one end end of the crossbeam, can be with
More accurately gather test data；Through actual measurement, the shake-table test comparison data collection of the invention based on resonant frequency
Device gathered data is true, reliable, can accurately be used for comparison result analysis.
The present invention the shake-table test comparison method based on resonant frequency have clear principle, it is workable,
Data are reliable, broad covered area the characteristics of.
Brief description of the drawings
Fig. 1 is the installment state signal of the shake-table test comparison data harvester of the invention based on resonant frequency
Figure；
Fig. 2 is the key step schematic diagram of the shake-table test comparison method of the invention based on resonant frequency；
Fig. 3 is the signal of circular ring type comparison circuit in the shake-table test comparison method of the invention based on resonant frequency
Figure；
Fig. 4 is the signal that shake-table test comparison method culminant star form of the present invention based on resonant frequency compares circuit
Figure；
Fig. 5 is the signal of petal type comparison circuit in the shake-table test comparison method of the invention based on resonant frequency
Figure；
Fig. 6 is sine sweep experiment spectrum schematic diagram in the embodiment of the present invention 2；
Fig. 7 is the actual measurement collection of illustrative plates of pilot lab A in the embodiment of the present invention 2；
Fig. 8 is normal distribution schematic diagram.
Reference numerals list
100- control devices
110- bases
111- mounting holes
112- installation bolts
120- columns
130- crossbeams
200- compares sample
300- sensing devices
310- first controls sensor
320- second controls sensor
330- monitors sensor
400- shake tables
410- moving-coils
Embodiment
It is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
Fig. 1 is the installment state signal of the shake-table test comparison data harvester of the invention based on resonant frequency
Figure.It illustrates a kind of preferred implementation of shake-table test comparison data harvester of the present invention based on resonant frequency
Mode.
As shown in figure 1, a kind of shake-table test comparison data harvester based on resonant frequency, it includes control
Device 100 and the comparison sample 200 being connected by sensing device 300 with control device 100.
It is preferred that, control device 100 can use control computer.
It is one of key link that laboratory monitoring vibration is compared to compare sample design, compares sample and plays the intrinsic frequency that is excited
The effect of rate and resonance point transmission of quantity value, its quality designed will have a direct impact to comparison result, in addition, it should also ensure that hair
Each Inter-laboratory comparisons sample characteristics of for example is put into be consistent, therefore, compare sample design to consider it is following some：
1) free degree of each in complex sample component intrinsic frequency is interacted, and comparison result may be impacted,
Therefore vibration compares sample structure and should stablized, reliably；
2) compare sample design and be considered as structural vibration three elements (quality m, rigidity k, damping c), three elements determine structure
Vibration characteristics, by intrinsic frequencyUnderstand the size of intrinsic frequency has with comparing the rigidity k and quality m of sample
Close, consider from structure design, for the frequency range of the most of laboratory vibration platform of covering, compare sample should in 2000Hz energy
Resonant frequency is enough measured, resonant frequency can be changed by changing comparison sample rigidity；
3) to ensure that testing stand value is accurately delivered to comparison sample, gathered data is more reasonable, and comparison should be reduced as far as possible
Transferred between sample and testing stand, compare sample and consider to be directly connected to fastening by sufficient amount bolt with testing stand；
4) position of install sensor can be fastened by comparing sample surfaces, it is ensured that control sensor, monitoring sensor connection can
Lean on.
Based on above-mentioned consideration, the comparison sample 200 of following structure.
Comparing sample 200 includes base 110, the column 120 being arranged on base 110 and the horizontal stroke being arranged on column 120
Beam 130.
The lower end of column 120 is arranged at the position of centre of gravity of base 110.
The upper end of column 120 is connected with the middle part of crossbeam 130, makes column 120 and one T-type structure of formation of crossbeam 130.
Multiple mounting holes 111 are provided with base 110.In the mounted state, multiple installation bolts 112 pass through multiple peaces
Dress hole 111 is connected with the moving-coil 410 of laboratory internal vibration platform 400, compares the shake-table test based on resonant frequency
Data acquisition device is rigidly fixed on shake table 400, and the shake-table test comparison data based on resonant frequency is adopted
The center of gravity of acquisition means and the axis of shake table 400 coincide.
It is preferred that, the connection pretightning force between the moving-coil 410 of installation bolt 112 and shake table 400 is 45N.m.
Said structure is designed as by the way that sample 200 will be compared, shake table can be reduced and the ferryman excessively between sample is compared
The influence to result of the test is filled, and ensures to compare the uniformity that sample 200 is installed between laboratory.
Sensing device 300 includes the monitoring control control sensor 320 of sensor 310 and second of sensor 330, first.
Monitoring sensor 330 is arranged at one end end of crossbeam 130.It is preferred that, monitoring sensor 330 passes for miniature monitoring
Sensor, to mitigate the weight of monitoring sensor 330.I.e. monitoring sensor 330 preferentially selects the Miniature Sensor of lighter weight,
The smaller sensor of quality is just smaller to the influence to comparing sample resonance search, and the resonance point searched out is closer to true resonance
Point.
The first control control sensor 320 of sensor 310 and second is arranged on base 110 and in column 120
The heart is symmetrical.It is preferred that, the first control control sensor 320 of sensor 310 and second is disposed in proximity to the position of installation bolt 112
Put.
The monitoring control control sensor 320 of sensor 310 and second of sensor 330, first is connected with control device 100
Connect.
It is preferred that, control device 100 controls sensor 320 flat using weighting by the first control sensor 310 and second
The mode of equal control strategy realizes the vibration control to comparing sample 200.
Specifically, the shake-table test comparison data harvester installation process based on resonant frequency of the present embodiment
It is as follows：
The crossbeam 130 compared in sample 200 is fixed into the center of gravity that lower end is fixed on base 110 by countersunk head soket head cap screw
The top of column 120 at position, makes crossbeam 130 and the one T-shape structure of formation of column 120；
Base 110 is connected to the moving-coil 410 of shake table 400 by installation bolt 112 (countersunk head hexagon socket head cap screw) again, pacified
Fill when bolt 112 is fastened and use torque spanner, pretightning force is 45N.m, moved so that comparing sample 200 and being directly anchored to shake table
The axis of circle center position and center of gravity and shake table coincides；
Sensor 320 is controlled to be set on the centrosymmetric mode of column 120 first control sensor 310 and second again
It is placed on base 110, and is preferably secured to close to the position of installation bolt 112；
Monitoring sensor 330 is fixed at one end end position of crossbeam 130 again；
Finally, will monitor sensor 330, first by wire controls sensor 310 and second to control sensor 320 and control
Device 100 processed is connected.
The shake-table test comparison data harvester based on resonant frequency of the present embodiment employ base 110,
It is simple in construction but reliable and stable that the column 120 being arranged on base 110 and the crossbeam 130 being arranged on column 120 are constituted
Compare sample, it is possible to reduce it to comparison result to impacting；And the comparison sample 200 of the present embodiment, which is directly installed on, to shake
On dynamic platform, it should can as far as possible reduce and be transferred between comparison sample and shake table, it can be ensured that shake table value is accurately delivered to
Sample is compared, gathered data is more reasonable.In addition, being controlled by the first control sensor 310 and second that will be connected with control device
Monitoring sensor 330 is arranged at crossbeam by sensor 320 processed to be arranged on the centrosymmetric mode of column 120 on base
130 one end end, can more accurately gather test data.
Through actual measurement, the shake-table test comparison data harvester gathered data based on resonant frequency of the present embodiment
Truly, reliably, comparison result analysis can be accurately used for.
Embodiment 2
Fig. 2 is the key step schematic diagram of the shake-table test comparison method of the invention based on resonant frequency.It shows
A kind of one kind of shake-table test comparison method based on resonant frequency of the invention is gone out preferred embodiment.
The general principle of the shake-table test comparison method based on resonant frequency of the present invention is as follows：
The intrinsic frequency of object is relevant with the inherent characteristic of system (such as quality, shape, material), and each object can have
Intrinsic frequency even multistage intrinsic frequency, when the external world, which applies vibration, is delivered to the object, the vibration frequency that the external world is passed over
When identical or very close with natural frequency of object, vibration aggravation occurs in the object, now, and the frequency is resonant frequency.
Theoretically, if every Inter-laboratory comparisons sample is consistent with test method, when doing sine sweep, when apply just
When string swept frequency is overlapped with comparing sample intrinsic frequency, the resonance peak of identical frequency can be excited, if frequency appearance is larger
Deviation, then cause for laboratory each side factor, need to analyze improvement.
Therefore, the resonant frequency monitored by the use of resonance method is as analyze data is compared, to evaluate the ability in every laboratory
It is feasible.
According to above-mentioned principle, a kind of shake-table test comparison method based on resonant frequency is present embodiments provided.
As shown in Fig. 2 a kind of shake-table test comparison method based on resonant frequency, it comprises the following steps：
(1) pilot lab and at least two Reference Labs are provided；
(2) the shake-table test comparison data harvester based on resonant frequency described in embodiment 1 is provided；
(3) circuit compared by data acquisition device by circular ring type, star formula or petal type gather pilot lab and
The resonance frequency data of Reference Lab；
(4) resonance frequency data in all laboratories by Z than fraction method to collecting is handled, and obtains processing knot
Really；And then the ability of judgment experiment room.
Wherein, in step (1), pilot lab is top laboratory in industry；Reference Lab is to have in industry
Representational military or civilian laboratory.
Specifically, the shake-table test comparison method based on resonant frequency of the present embodiment specifically includes following step
Suddenly：
A. the shake-table test comparison data harvester based on resonant frequency is installed in pilot lab, is remembered
Record experimental condition and result of the test；
B. same data acquisition device and identical experimental condition in step A are used, by circular ring type, star formula or petal
The circuit that formula is compared completes experiment and log in all reference experiments rooms；
C. the result of the test obtained in step A and step B is handled by Z than fraction method progress；
D. according to step C result, the ability in each laboratory is judged.
Wherein, circular ring type, star can be may be selected according to the quality for comparing sample stability, the circuit of comparison in the present embodiment
Form, petal type, as shown in Fig. 3, Fig. 4, Fig. 5.
Wherein A represents pilot lab, and B, C, D, E, F, G represent Reference Lab.
Few in Reference Lab, Transfer Standards (comparing sample) are relatively simple for structure, be easy to carrying, stability very
In the case of good, it is applicable circular ring type and compares；Star formula is applied to many set Transfer Standards and carried out simultaneously, and the comparison cycle is short, even if one
Covering Transfer Standards and damaging also only influences the comparison data in a laboratory；Petal type can compare control in comparison process by invalid
A certain intermediate link.
Due to the design of the shake-table test comparison data harvester based on resonant frequency used in the present embodiment
Reliable and stable, it can be ensured that vibration value is delivered in the stability of different experiments room, monitoring sensor gathered data is accurate, therefore
Path can be compared using circular ring type and carry out vibration test.
Below, to be compared using circular ring type exemplified by path carries out vibration test to experiment of the present embodiment based on resonant frequency
Room vibration test comparison method is described in detail.
(1) determine to compare tissue.
One pilot lab A and six Reference Labs B, C, D, E, F, G are provided.
(2) the comparison sample in data acquisition device is determined.
Using the data acquisition device compared in sample 200 and embodiment 1 in embodiment 1.
(3) path progress vibration test (as shown in Figure 3) is compared using circular ring type.
It is determined that comparing behind path, carry out an overall process in advance by pilot lab A and test, then satisfied the need along circular ring type ratio
Footpath (as shown in Figure 3) passes to player whose turn comes next laboratory by sample, experimental condition is compared, until every Reference Lab completes to compare examination
Test, then pass pilot lab back.
Specifically include：
A. the installation of sample is compared：Sample will be compared and be arranged on detected laboratory according to the mounting means of embodiment 1
On interior jigging platform moving coil.
B. the installation of sensor：First control sensor 310, second control sensor 320 and monitoring sensor 330 are pressed
According to embodiment 1 mounting means be arranged on compare sample on, and by first control sensor 310, second control sensor 320 with
And monitoring sensor 330 and control device are connected.
C. the application of proof stress：Laboratory (including pilot lab A and Reference Lab B, C, D, E, F, G) is participated in press
Fig. 6 sets sine sweep experiment spectrum, using logarithm frequency sweep, and analytical spectra line number sets 2048, swept frequency range 5Hz~2000Hz, rises
Beginning frequency 5Hz, sweep rate 0.5Oct/min, compressibility factor sets 40, and sweep is each frequency sweep 1 time up and down.
D. data record：Participate in laboratory record monitoring sensor and measure peak accelerator and its corresponding resonant frequency,
And give pilot lab A by measurement feedback.
Such as：Pilot lab A actual measurement collection of illustrative plates is shown in Fig. 7, from measurement result as can be seen that comparing sample in 2000Hz scopes
Interior, there are 2 peak values in monitoring, is that frequency is 472.44Hz respectively, acceleration reaches 24.4g；Frequency is 1550.38Hz acceleration
509.27g is reached, this 2 Frequency points reflect 1 rank for comparing sample, 2 rank intrinsic frequencies, we choose what resonance became apparent
2 rank intrinsic frequencies are used as comparison analyze data.
Reference Lab B, C, D, E, F, G complete sample and have recorded test data in the same way.
(4) comparison data is handled.
A. data processing method：Compared for laboratory monitoring vibration test, it is unknown due to comparing sample intrinsic frequency, and shadow
The factor for ringing measurement result is more, and the reference value for comparing sample is possible to outlier occur, therefore should not use average value conduct
Reference value, and median is not influenceed by larger, smaller outlier, therefore using median as reference value, using median
When determining reference value, evaluation of result and analysis are carried out than fraction with Z.
Z is more specific as follows than the principle of fraction method：
Robust statistical techniques are to obey normal state or approximate normal distribution it is assumed that normal distribution is one based on measurement result
Continuously, symmetrical " bell " curve, as shown in Figure 8.
Z is that is, σ in figure.
Z=1, the value for having 68.3% is in the range of 1 times of standard deviation of average value (median)；Z=2, there is 95.5%
Value is in the range of 2 times of standard deviations；The value that Z=3 has 99.7% is in the range of 3 times of standard deviations.
This is compared evaluates each ability for participating in laboratory with Z than fraction, i.e.,：| z |≤2 be satisfactory result；2 ＜ | z |
＜ 3 is the result that leaves a question open, and laboratory should search reason and take corresponding precautionary measures；| z | >=3 be dissatisfied result, and laboratory should
Search reason and take corresponding corrective action.Z is defined as than fraction：
In formula：
The measurement result of Inter-laboratory comparisons sample is participated in x-expression；
After median-expression measurement result is sorted by size, it is divided into equal 4 decile, Q2 positions correspondence measurement knot
Really, Qi=i (n+1)/4, i=1,2,3, n represent item number；
NIQR-expression standard interquartile range：
NIQR=0.7413 × IQR=0.7413 × (Q3-Q1)
In formula：
The difference of the high quartile of IQR-expression and low quartile；
Q3- high quartile is represented, after measurement result is sorted by size, it is divided into equal 4 decile, Q3Position correspondence is surveyed
Measure result, Qi=i (n+1)/4, i=1,2,3, n represent item number；
Q1- low quartile is represented, after measurement result is sorted by size, it is divided into equal 4 decile, Q1Position correspondence is surveyed
Measure result, Qi=i (n+1)/4, i=1,2,3, n represent item number.
B. data processed result：
This laboratory monitoring vibration test is compared, and is initiated by A laboratories, and B, C, D, E, F, G are participated in six laboratories, respectively
Completed by comparison method after experiment, obtain 7 lab measurements, be shown in Table 1.
The measurement result of table 1
| Laboratory | A | B | C | D | E | F | G |
| Measurement result (Hz) | 1550.38 | 1568.64 | 1554.93 | 1543.14 | 1478.36 | 1559.61 | 1570.25 |
Measurement result by being ranked up from small to large, and ranking results are shown in Table 2.
The measurement result of table 2 sorts
| Name placement | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Measurement result (Hz) | 1478.36 | 1543.14 | 1550.38 | 1554.93 | 1559.61 | 1568.64 | 1570.25 |
Q value correspondence position sequence numbers：
Q1=1 (7+1)/4=2；
Q2=2 (7+1)/4=4；
Q3=3 (7+1)/4=6；
NIQR=0.7413 × IQR=0.7413 × (Q3-Q1)=18.90315；
Fractional formula is compared by Z：Calculate and participate in laboratory Z than fraction, Z is shown in Table 3 than fraction.
Table 3 participates in laboratory Z values
| Laboratory | A | B | C | D | E | F | G |
| Measurement result (Hz) | 1550.38 | 1568.64 | 1554.93 | 1543.14 | 1478.36 | 1559.61 | 1570.25 |
| Sane Z compares fraction | -0.24 | 0.73 | 0 | -0.62 | -4.05 | 0.25 | 0.81 |
From table 3 it can be seen that E laboratories | z | ＞ 2, is as a result dissatisfied, remaining laboratory | z |≤2, it is as a result satisfaction,
The systematical difference that E laboratories should exist from the enchancement factor in laboratory and between other laboratories finds reason, is changed
Enter.
The shake-table test comparison data harvester gathered data based on resonant frequency used in the present embodiment
Truly, reliably, comparison result analysis can be accurately used for.
In addition, the shake-table test comparison method based on resonant frequency of the present embodiment has clear principle, can grasped
The property made is strong, data are reliable, broad covered area the characteristics of.
It should be noted that all features disclosed in this specification, or disclosed all methods or during the step of,
In addition to mutually exclusive feature and/or step, it can combine in any way.
In addition, above-mentioned specific embodiment is exemplary, those skilled in the art can opening in the disclosure of invention
Give and find out various solutions, and these solutions also belong to disclosure of the invention scope and fall into the protection of the present invention
Within the scope of.It will be understood by those skilled in the art that description of the invention and its accompanying drawing be it is illustrative and not constitute to power
The limitation that profit is required.Protection scope of the present invention is limited by claim and its equivalent.
Claims (8)
1. the shake-table test comparison data harvester based on resonant frequency, it is characterised in that it includes control device
(100) the comparison sample (200) and by sensing device (300) being connected with the control device (100)；
The sample (200) that compares includes base (110), the column (120) being arranged on the base (110) and is arranged at institute
State the crossbeam (130) on column (120)；
Wherein, the lower end of the column (120) is arranged at the position of centre of gravity of the base (110)；The column (120) it is upper
End makes the column (120) and the crossbeam (130) one T-type structure of formation with being connected in the middle part of the crossbeam (130)；
The sensing device (300) includes monitoring sensor (330), the first control sensor (310) and the second control sensor
(320)；
Wherein, the monitoring sensor (330) is arranged at one end end of the crossbeam (130)；The first control sensor
(310) it is arranged at the second control sensor (320) on the base (110) and on the column (120) center
Symmetrically.
2. the shake-table test comparison data harvester according to claim 1 based on resonant frequency, its feature
It is, multiple mounting holes (111) is provided with the base (110)；
In the mounted state, multiple installation bolts (112) pass through multiple mounting holes (111) and laboratory internal vibration platform
(400) moving-coil (410) is connected, and makes the shake-table test comparison data harvester rigidity based on resonant frequency
It is fixed on the shake table (400), and the shake-table test comparison data harvester based on resonant frequency
Center of gravity and the axis of the shake table (400) coincide.
3. the shake-table test comparison data harvester according to claim 2 based on resonant frequency, its feature
It is,
Connection pretightning force between the installation bolt (112) and the moving-coil (410) of the shake table (400) is 45N.m.
4. the shake-table test comparison data harvester according to claim 1 based on resonant frequency, its feature
It is, the monitoring sensor (330) is miniature monitoring sensor, to mitigate the weight of the monitoring sensor (330).
5. the shake-table test comparison data harvester according to claim 1 based on resonant frequency, its feature
It is, the control device (100) is control computer.
6. a kind of shake-table test comparison method based on resonant frequency, it is characterised in that it comprises the following steps：
(1) pilot lab and at least two Reference Labs are provided；
(2) the collection dress of the shake-table test comparison data based on resonant frequency as described in one of claim 1 to 5 is provided
Put；
(3) circuit compared by the data acquisition device by circular ring type, star formula or petal type gathers the leading experiment
Room and the resonance frequency data of the Reference Lab；
(4) resonance frequency data in all laboratories by Z than fraction method to collecting is handled, and obtains result；
And then the ability of judgment experiment room.
7. a kind of shake-table test comparison method based on resonant frequency according to claim 6, it is characterised in that
Specifically include following steps：
A. the shake-table test comparison data collection dress based on resonant frequency is installed in the pilot lab
Put, recorded experimental condition and result of the test；
B. use the step A in the same data acquisition device and identical experimental condition, by circular ring type, star formula or
The circuit that petal type is compared completes experiment and log in all reference experiments rooms；
C. the result of the test obtained in the step A and the step B is handled by Z than fraction method progress；
D. according to the result of the step C, the ability in each laboratory is judged.
8. a kind of shake-table test comparison method based on resonant frequency according to claim 6, it is characterised in that
In the step (1), the pilot lab is top laboratory in industry；The Reference Lab is to have generation in industry
The military or civilian laboratory of table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677085.0A CN107290118A (en) | 2017-08-09 | 2017-08-09 | Shake-table test comparison method and data acquisition device based on resonant frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677085.0A CN107290118A (en) | 2017-08-09 | 2017-08-09 | Shake-table test comparison method and data acquisition device based on resonant frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107290118A true CN107290118A (en) | 2017-10-24 |
Family
ID=60104795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710677085.0A Pending CN107290118A (en) | 2017-08-09 | 2017-08-09 | Shake-table test comparison method and data acquisition device based on resonant frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107290118A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110146406A1 (en) * | 2009-07-15 | 2011-06-23 | Ata Engineering, Inc. | Methods and apparatus for vibration testing using multiple sine sweep excitation |
| CN102539101A (en) * | 2011-12-31 | 2012-07-04 | 北京卫星环境工程研究所 | Force limit control vibration test system and test method |
| CN204556204U (en) * | 2015-02-11 | 2015-08-12 | 西安东仪综合技术实验室有限责任公司 | Verification/comparison device during vibration experiment |
| CN106441761A (en) * | 2016-09-20 | 2017-02-22 | 天津航天瑞莱科技有限公司 | Engine blade fatigue testing device |
| CN206974646U (en) * | 2017-08-09 | 2018-02-06 | 成都凯天质检技术服务有限责任公司 | Shake-table test comparison data harvester based on resonant frequency |
-
2017
- 2017-08-09 CN CN201710677085.0A patent/CN107290118A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110146406A1 (en) * | 2009-07-15 | 2011-06-23 | Ata Engineering, Inc. | Methods and apparatus for vibration testing using multiple sine sweep excitation |
| CN102539101A (en) * | 2011-12-31 | 2012-07-04 | 北京卫星环境工程研究所 | Force limit control vibration test system and test method |
| CN204556204U (en) * | 2015-02-11 | 2015-08-12 | 西安东仪综合技术实验室有限责任公司 | Verification/comparison device during vibration experiment |
| CN106441761A (en) * | 2016-09-20 | 2017-02-22 | 天津航天瑞莱科技有限公司 | Engine blade fatigue testing device |
| CN206974646U (en) * | 2017-08-09 | 2018-02-06 | 成都凯天质检技术服务有限责任公司 | Shake-table test comparison data harvester based on resonant frequency |
Non-Patent Citations (1)
| Title |
|---|
| 洪翔;: "基于共振频率搜索实验室间振动试验比对设计" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109271755B (en) | A kind of application calculates the method and system of rock strength with brill data | |
| CN106771765A (en) | A kind of multidimensional parameter appraisal procedure of operating composite insulator degree of aging | |
| CN108344663B (en) | Asphalt multi-stage creep damage testing method | |
| CN105843870B (en) | The analysis method and its application of repeatability and reproducibility | |
| CN110207914A (en) | One kind being based on the quiet dynamic detection method of cloud data and system | |
| CN109218136B (en) | WIFI connection performance test method and device, computer equipment and storage medium | |
| CN109115383A (en) | The Prediction method for fatigue life of cold extrusion Strengthening Hole | |
| CN109657720B (en) | On-line diagnosis method for turn-to-turn short circuit fault of power transformer | |
| CN104255118B (en) | Rapid lossless testing method based on near infrared spectroscopy technology for paddy rice seed germination percentage | |
| CN109142865A (en) | Consider the frequency domain spectra discrimination method of paper oil insulation interfacial polarization equivalent circuit parameter | |
| CN109613221A (en) | A kind of test method of test road asphalt damage self-healing performance | |
| CN109558983A (en) | Network courses dropping rate prediction technique and device | |
| CN109506965A (en) | Weld space grid structure node weld damage substep diagnostic method | |
| CN105806926A (en) | Method and device for testing atmospheric ion mobility | |
| CN104112003B (en) | The method and system that the performance of game terminal is detected | |
| CN105953990B (en) | A kind of analysis method of structural damping property for spacecraft stent | |
| CN102128805A (en) | Method and device for near infrared spectrum wavelength selection and quick quantitative analysis of fruit | |
| CN105740617B (en) | The balancing method of integrated antenna-feeder system quality degree | |
| Lien et al. | Assessing guava maturity by statistical analyses of dropped fruit impact responses | |
| CN110020604A (en) | A kind of quality of vegetable detection method and system | |
| CN107290118A (en) | Shake-table test comparison method and data acquisition device based on resonant frequency | |
| CN206974646U (en) | Shake-table test comparison data harvester based on resonant frequency | |
| CN109063950B (en) | Dynamic time warping association assessment method for controllability of intelligent power distribution network | |
| CN110398349A (en) | A kind of active medical instrument reliability test method based on typical environment stress | |
| CN105844646A (en) | Mixture spectrum consistency determination method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171024 |