CN106768288A - A kind of high precision high rigidity heavy load piezoelectric type decouples microvibration measuring system - Google Patents
A kind of high precision high rigidity heavy load piezoelectric type decouples microvibration measuring system Download PDFInfo
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- CN106768288A CN106768288A CN201611103092.1A CN201611103092A CN106768288A CN 106768288 A CN106768288 A CN 106768288A CN 201611103092 A CN201611103092 A CN 201611103092A CN 106768288 A CN106768288 A CN 106768288A
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- 238000005259 measurement Methods 0.000 claims abstract description 25
- 238000013461 design Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000013480 data collection Methods 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 70
- 238000007906 compression Methods 0.000 claims description 70
- 230000005540 biological transmission Effects 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 15
- 238000010008 shearing Methods 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 230000017105 transposition Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 230000003534 oscillatory effect Effects 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000737 Duralumin Inorganic materials 0.000 claims description 3
- 229910000760 Hardened steel Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003012 network analysis Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Abstract
The invention discloses a kind of high precision high rigidity heavy load piezoelectric type decoupling microvibration measuring system, whole system is demarcated five parts of disk and Data collection and precessing system and is constituted by construction module, core sensor group module, loading disk；Core sensor group module is divided into four longitudinal radial transducers and four tangential sensors in longitudinal direction, and sensor group is located between loading disk and base plate in the vertical, is located between interior octagon side plate and outer panel in transverse direction, and be bolted；Sensor Design make use of the piezo-electric effect of piezoelectric ceramic piece, and simple structure, stable performance, certainty of measurement is high and easy to assembly.The present invention realizes multiple targets such as big physical dimension, heavy load, high rigidity, high accuracy and decoupling measurement simultaneously, and demarcates simple, and the frequency range of measurement is big, and Measurement reliability is high.
Description
Technical field
The present invention relates to a kind of high precision high rigidity heavy load piezoelectric type decoupling microvibration measuring system, can be used for space flight
The large-scale vibration signal for disturbing the disturbing load of the part that shakes on six-freedom degree in device inside enters Mobile state measurement.
Background technology
Current spacecraft belongs to large-scale flexible expansion mechanism mostly, and with substantial amounts of optical element, they are right
Pointing accuracy and stability propose requirement very high.The shake of influence satellite and the main of attitude stability include external force of environment
Interference, attitude maneuver, the factor such as disturbing moment of movable part on star.In modern spacecraft attitude control system, controling power
Square gyro and solar wing drive mechanism etc. are the critical elements in its control system, and they are providing the same of necessary control power
When, can also cause some nuisance vibrations.These vibrations can substantially reduce the performance indications of precision instrument in space, thus measurement and
The dynamic characteristic of analysis spacecraft payload disturbance, for analyzing and eliminates disturbance so as to improve the gesture stability essence of spacecraft
The safe design of degree and reinforcement spacecraft has very important engineering significance.
Due to continuing to develop for China's aerospace industry, the specification of spacecraft constantly increases, the chi of space flight internal activity part
Very little also constantly to increase, want accurate measurement large component disturbs characteristic of shaking, it is necessary to designs larger sized ergograph, but surveys
With the increase of size, its rigidity can decline rapidly power platform, cause its effective frequency range to narrow, and tend not to disturb higher frequency band
Shake and effectively measured.Meanwhile, existing microvibration measuring technology is typically only capable to measure six space force components and is coupled
Data-signal afterwards can just obtain required result, it is necessary to the software for passing through complexity is post-processed, and, couple the demarcation of ergograph
Process is complicated, and the error of Data Post is also larger.In sum in order to solve this series of contradiction with deficiency, it is necessary to design
Going out one can take into account physical dimension with the rigidity of structure by that can realize the ergograph that decoupling is measured, and just vigorously be sent out with meeting China
The need for aerospace engineering in exhibition.
So far both at home and abroad there is not yet high precision high rigidity heavy load piezoelectric type decouples micro- shaking under relevant this physical dimension
The reported in literature of dynamic measuring system.
The content of the invention
The technical problem to be solved in the present invention is：Overcome existing ergograph undersized, rigidity is too low and calibration process is multiple
It is miscellaneous, it is impossible to which that the deficiency of power of shaking is disturbed in display in real time, there is provided a kind of high precision high rigidity heavy load piezoelectric type decoupling microvibration measuring system
System, can directly measure large-scale six sharing parts of the load for disturbing vibration source generation in shake table center, be run for analyzing spacecraft
Cheng Zhong, dynamic characteristic of the disturbing source on the six-freedom degree of space, to improve the attitude control accuracy of spacecraft and strengthening space flight
The safe design of device provides reliable test data.
The invention solves the problems that the technical scheme that its technical problem is used is：A kind of high precision high rigidity heavy load piezoelectric type
Decoupling microvibration measuring system, including construction module 1, groups of sensor 2, loading disk 3, demarcate disk 4 and data acquisition and
Processing system 5；Construction module 1 by base plate 1.1, the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3,
4th outer panel 1.2.4, the first tilt prop 1.3.1, the second tilt prop 1.3.2, the 3rd tilt prop 1.3.3, the 4th tilt prop
1.3.4, angle fillet 1.5.1 on interior octagon plate 1.4, first, angle fillet 1.5.2 on second, triangle on the 3rd
Cover plate 1.5.3, angle fillet 1.5.4, an A type contiguous blocks 1.6.1, the 2nd A type contiguous blocks 1.6.2, the 3rd A types on the 4th
Contiguous block 1.6.3, the 4th A type contiguous blocks 1.6.4, the first Type B contiguous block 1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B
Contiguous block 1.7.3, the 4th Type B contiguous block 1.7.4 are constituted；2 points of groups of sensor is four Hes of longitudinal direction-radial transducer 2.1
Four longitudinal direction-tangential sensors 2.2, wherein four longitudinal direction-radial transducers 2.1 are located at the outside table of interior octagon plate 1.4 respectively
On four 90 degree of directions side in face, tightened by bolt with loading disk 3, base plate 1.1, interior octagon plate 1.4, with the first outer panel
1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4 pass through an A type contiguous blocks respectively
1.6.1, the 2nd A type contiguous blocks 1.6.2, the 3rd A type contiguous blocks 1.6.3, the 4th A type contiguous blocks 1.6.4 are connected with；Four
Longitudinal direction-tangential sensor 2.2 respectively on four 45 degree of directions side of the interior outer surface of octagon plate 1.4, with loading disk 3,
Base plate 1.1, interior octagon plate 1.4 are tightened by bolt, with the tilt props of first the second tilt props of tilt prop 1.3.1 1.3.2 the 3rd
1.3.3 the 4th tilt prop 1.3.4 is connected by the first Type B contiguous block 1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B respectively
Block 1.7.3, the 4th Type B contiguous block 1.7.4 are connected with；Longitudinal direction-radial transducer 2.1 is made up of seven parts, i.e. sensor
Bottom 2.1.1, first sensor side plate 2.1.2, second sensor side plate 2.1.3, sensor core 2.1.4, bottom tension and compression piece
2.1.5, sidepiece tension and compression piece 2.1.6 and circular power transmission pad 2.1.7 compositions；Longitudinal direction-tangential sensor 2.2 is also by seven part groups
Into i.e. sensor bottom 2.2.1, first sensor side plate 2.2.2, second sensor side plate 2.2.3, sensor core 2.2.4, bottom
Tension and compression piece 2.2.5, sidepiece shearing piece 2.2.6 and square power transmission pad 2.2.7 compositions；Longitudinal direction-tangential sensor 2.2 with it is vertical
It is that the sidepiece tension and compression piece 2.1.6 in longitudinal direction-radial transducer 2.1 is passed with circular to the difference of-radial transducer 2.1
Power pad 2.1.7 is changed to sidepiece shearing piece 2.2.6 and the square power transmission pad at same position in longitudinal direction-tangential sensor 2.2
2.2.7, remaining structure is identical.Longitudinal direction-radial transducer sensor 2.1, longitudinal direction-tangential sensor 2.2 are passed according to structure
Force characteristic is designed, and the mentality of designing of longitudinal direction-radial transducer 2.1 is as follows：Bottom tension and compression piece 2.1.5 is located at sensor bottom
2.1.1 and sensor core 2.1.4 between, sensor bottom 2.1.1 and sensor core 2.1.4 is tightened so that bottom by six bolts
Portion's tension and compression piece 2.1.5 is compacted；Sidepiece tension and compression piece 2.1.6 be located at first sensor side plate 2.1.2 and sensor core 2.1.4 it
Between, first sensor side plate 2.1.2 and sensor core 2.1.4 is tightened by four bolts so that sidepiece tension and compression piece 2.1.6 quilts
Compress；Circular power transmission pad 2.1.7 is located between second sensor side plate 2.1.3 and sensor core 2.1.4, second sensor side
Plate 2.1.3 and sensor core 2.1.4 is tightened by four bolts so that circle power transmission pad 2.1.7 is compacted；Longitudinal direction-tangential
The mentality of designing of sensor 2.2 is as follows, and bottom tension and compression piece 2.2.5 is located between sensor bottom 2.2.1 and sensor core 2.2.4, passes
Sensor bottom 2.2.1 and sensor core 2.2.4 is tightened by six bolts so that bottom tension and compression piece 2.2.5 is compacted；Sidepiece is cut
Section 2.2.6 is located between first sensor side plate 2.2.2 and sensor core 2.2.4, first sensor side plate 2.2.2 and sensing
Device core 2.2.4 is tightened by four bolts so that sidepiece shearing piece 2.2.6 is compacted；Square power transmission pad 2.2.7 is located at the
Between two sensor side plate 2.2.3 and sensor core 2.2.4, second sensor side plate 2.2.3 and sensor core 2.2.4 passes through four
Individual bolt is tightened so that square power transmission pad 2.2.7 is compacted；Circular power transmission pad 2.1.7 is physical dimension and sidepiece tension and compression
The aluminium flake that piece 2.1.6 is identical and rigidity is close with piezoelectric patches, square power transmission pad 2.2.7 is that physical dimension shears piece with sidepiece
2.2.6 the identical and rigidity aluminium flake close with piezoelectric patches, it is the uniformity and uniformity for ensureing power transmission that both act on；In test
During, first sensor bottom 2.1.1, second sensor bottom 2.2.1 and first sensor side plate 2.1.2, second sensor side
2.1.3,3rd sensor side plate 2.2.2, the 4th sensor side plate 2.2.3 are remained stationary as because of being connected with construction module, the
The load that one sensor core 2.1.4, the second sensor core 2.2.4 sources of being disturbed are transmitted can produce micro-displacement so that and piezoelectricity
Piece is mutually extruded or mutually sheared so that the first bottom tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5 can be measured vertically
Axial force signal, sidepiece tension and compression piece 2.1.6 can measure horizontal radial force signal, and sidepiece shearing piece 2.2.6 can measure level
Tangential force signal；Four longitudinal direction-tangential sensors 2.2 are by the designed mode of connection, it is possible to achieve four longitudinal direction-radial directions are passed
To the vibration force along Z axis, sidepiece shears surveys of the piece 2.2.6 to oscillatory torque about the z axis to bottom tension and compression piece 2.2.5 in sensor 2.2
Amount；Groups of sensor 2 is connected by signal transmssion line with Data collection and precessing system 5；When small sample perturbations source produces vibration
When, groups of sensor 2 produces six piezoelectric signals, and six sensitivity coefficients of decoupling are obtained after being demarcated to shake table,
Real-time six component spaces force signal just can be in the measurements obtained after six acquisition channels will be assigned, so as to pass through data analysis
The vibration characteristics of network analysis disturbing source.
Further, in order to carry out vibration measurement to larger-size vibration source of disturbing, the test platform architecture dimensioning
Very little also larger (1200mm long, 1200mm wide, 246.5mm high), in order to ensure that structure must be with intrinsic frequency higher as far as possible
The cavity in structure is reduced, based on this consideration, in the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel
1.2.3, the 4th outer panel 1.2.4, the tilt prop 1.3.3 of first the second tilt props of tilt prop 1.3.1 1.3.2 the 3rd, the 4th diagonal brace
There is no the place of sensor to install aluminium ingot additional between plate 1.3.4 and interior octagon plate 1.4 to tamp space, and ring is used at gap
Oxygen resin glue is poured.Cavity at four angles of ergograph need to be processed with same method.
Further, in order that the rigidity of structure meets requirement, sensor 2.1,2.2 uses case-hardened steel, its remaining part
Material is divided to be duralumin.
Further, in sensor assembling process, with bolt by piezoelectric patches group be pressed on first sensor bottom 2.1.1,
Between second sensor bottom 2.2.1 and first sensor core 2.1.4 second sensor cores 2.2.4 and first sensor side plate
When 2.1.2, between second sensor side plate 2.2.2 and first sensor core 2.1.4, second sensor core 2.2.4, it is ensured that pressure
The stress of electric piece is uniform, therefore, need to ensure that the pretightning force of each screw on same mounting surface is phase with torque spanner
With.
Further, vibration test table installation process is as follows：
1) mounting structure module 1 inserts bolt from the lower surface of base plate 1.1, so as to by outside the first outer panel 1.2.1, second
Side plate 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4, the first tilt prop 1.3.1, the second tilt prop 1.3.2,
Three tilt prop 1.3.3, the 4th tilt prop 1.3.4 and interior octagon plate 1.4 are fixed on base plate 1.1, by bolt from base plate 1.1
Upper surface is inserted, so as to base plate 1.1 is fixed on ground；
2) install sensor module group 2, pacifies in the upper surface of first sensor bottom 2.1.1 and second sensor bottom 2.2.1
Dress piezoelectric patches positioner simultaneously lays the first bottom tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5 respectively, then at the first bottom
First sensor core 2.1.4 and second sensor core are placed respectively on portion's tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5
2.2.4 and by six bolts tighten；Transposition make the side surface of first sensor core 2.1.4 and second sensor core 2.2.4 to
On, piezoelectric patches positioner is installed in the face and sidepiece tension and compression piece 2.1.6 and sidepiece shearing piece 2.2.6 is laid respectively, then in side
First sensor side plate 2.1.2,3rd sensor side plate 2.2.2 are placed on portion's tension and compression piece 2.1.6 and sidepiece shearing piece 2.2.6 simultaneously
Tightened by four bolts；Transposition makes the surface of the opposite side of first sensor core 2.1.4 and second sensor core 2.2.4 again
Upwards, piezoelectric patches positioner is installed in the face and lays circular power transmission pad (2.1.7) and square power transmission pad respectively
2.2.7, then on circular power transmission pad 2.1.7 and square power transmission pad 2.2.7 place second sensor side plate 2.1.3 and the 4th
Sensor side plate 2.2.3 is simultaneously tightened by four bolts；So far the installation of groups of sensor 2；
3) groups of sensor 2 is fixed by bolts on base plate 1.1 and interior octagon plate 1.4, blending bolt is by the
One A type contiguous blocks 1.6.1, the 2nd A type contiguous blocks 1.6.2, the 3rd A type contiguous blocks 1.6.3, the 4th A type contiguous blocks 1.6.4 difference
Coupled together with the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4, led to
Cross the first Type B contiguous block 1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B contiguous block 1.7.3, the 4th Type B contiguous block 1.7.4
Coupled together with the tilt prop 1.3.4 of the first the 3rd tilt prop 1.3.3 of tilt prop 1.3.1 the second tilt prop 1.3.2 the 4th；
4) space aluminium ingot in structure is filled up and uses epoxide resin AB glue to pour, by angle fillet 1.5.1 on first,
Angle fillet 1.5.2 on second, angle fillet 1.5.3 on the 3rd, angle fillet 1.5.4 bolts and first on the 4th
Outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4 and the first tilt prop 1.3.1
The tilt prop 1.3.4 of second the 3rd tilt prop 1.3.3 of tilt prop 1.3.2 the 4th are connected；
5) loading disk 3 is connected with groups of sensor 2, has so far completed the assembling of whole ergograph.Using
Modularized design, assembling is simple and process is reversible.
Further, if the hole position of ground mounting surface changes, can install pinboard additional to adapt to not in the bottom of base plate 1.1
Same ground mounting surface.
Further, the needs are bolted the bolt of place coupling part and must be use up in the range of intensity permission
Amount is tightened, to improve the rigidity of the measuring system, it is ensured that its certainty of measurement.
Further, because piezoelectric patches self-characteristic can change with the change of time and environment, so that measurement result
Drift about, so needs are periodically demarcated to ergograph.Demarcate when will demarcate disk 4 with mode connects for screw on loading disk 3,
Can be demarcated with hammering method or other scaling methods.
The present invention has advantages below compared with prior art：
(1) (1200mm long, 1200mm wide, 246.5mm high) can keep structure higher under so big physical dimension
Rigidity, first natural frequency can reach 0.01N and 0.001Nm more than 900Hz, certainty of measurement.
(2) arranged by the space to sensor and the various combination of holding wire is designed, can directly obtain what is decoupled
Six voltage signals, directly measure the component force letter of space six in real time by setting in the channel by sensitivity coefficient obtained by calibrating
Number Fx、Fy、Fz、Mx、My、Mz。
(3) present invention is using modularized design and assembling is simple.
(4) measurement apparatus of the present invention and measured test specimen are separated, it is not necessary to installed on measured test specimen optional equipment and
Sensor, the dynamic characteristic of test specimen is not influenceed, and test specimen structure is not damaged, and experiment finishes rear test specimen can also normally be made
With.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structure decomposition figure of the embodiment of the present invention 1；
Fig. 3 is sensor schematic in the embodiment of the present invention 1；
Fig. 4 is sensor exploded view in the embodiment of the present invention 1.
Reference implication is：
1 is construction module, and 2 is groups of sensor, and 3 is loading disk, and 4 to demarcate disk, and 5 is data acquisition and processing (DAP) system
System；
1.1 is base plate, and 1.2.1 is the first outer panel, and 1.2.2 is the second outer panel, and 1.2.3 is the 3rd outer panel, 1.2.4
It is the 4th outer panel, 1.3.1 is the first tilt prop, 1.3.2 is the second tilt prop, 1.3.3 is the 3rd tilt prop, 1.3.4 is the
Four tilt props, 1.4 is interior octagon plate, and 1.5.1 is angle fillet on first, and 1.5.2 is angle fillet on second,
1.5.3 it is angle fillet on the 3rd, 1.5.4 is angle fillet on the 4th, and 1.6.1 is an A type contiguous blocks, and 1.6.2 is
2nd A type contiguous blocks, 1.6.3 is the 3rd A type contiguous blocks, and 1.6.4 is the 4th A type contiguous blocks, and 1.7.1 is the first Type B contiguous block,
1.7.2 it is the second Type B contiguous block, 1.7.3 is the 3rd Type B contiguous block, and 1.7.4 is the 4th Type B contiguous block；
2.1 is longitudinal direction-radial transducer, and wherein 2.1.1 is sensor bottom, and 2.1.2 is first sensor side plate, 2.1.3
It is second sensor side plate, 2.1.4 is sensor core, and 2.1.5 is bottom tension and compression piece, and 2.1.6 is sidepiece tension and compression piece, and 2.1.7 is
Circular power transmission pad；
2.2 is longitudinal direction-tangential sensor, and wherein 2.2.1 is sensor bottom, and 2.2.2 is first sensor side plate, 2.2.3
It is second sensor side plate, 2.2.4 is sensor core, and 2.2.5 is bottom tension and compression piece, and 2.2.6 is that sidepiece shears piece, and 2.2.7 is
Square power transmission pad.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment further illustrates the present invention.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of high precision high rigidity heavy load piezoelectric type decoupling microvibration measuring system
System, including：Construction module 1, groups of sensor 2, loading disk 3 demarcates disk 4 and Data collection and precessing system 5；Structure mould
Block 1 is by base plate 1.1, outer panel, tilt prop, interior octagon plate 1.4, upper angle fillet, A types contiguous block, Type B contiguous block group
Into；Outer panel includes the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3 and the 4th outer panel
1.2.4；Tilt prop includes the first tilt prop 1.3.1, the second tilt prop 1.3.2, the 3rd tilt prop 1.3.3 and the 4th tilt prop
1.3.4；Upper angle fillet includes angle fillet 1.5.1 on first, angle fillet 1.5.2 on second, triangle on the 3rd
Angle fillet 1.5.4 on shape cover plate 1.5.3 and the 4th；A types contiguous block includes that an A type contiguous blocks 1.6.1, the 2nd A types connect
Meet block 1.6.2, the 3rd A type contiguous block 1.6.3 and the 4th A type contiguous blocks 1.6.4；Type B contiguous block includes the first Type B contiguous block
1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B contiguous block 1.7.3 and the 4th Type B contiguous block 1.7.4；Groups of sensor 2
It is divided into four longitudinal direction-radial transducers 2.1 and four longitudinal direction-tangential sensors 2.2, wherein four longitudinal direction-radial transducers 2.1
Respectively on four 90 degree of directions side of the interior outer surface of octagon plate 1.4, the four longitudinal direction-tangential difference of sensor 2.2 positions
In on four 45 degree of directions side of the interior outer surface of octagon plate 1.4；Groups of sensor 2 and loading disk 3, base plate 1.1, interior eight
Side shape plate 1.4 is tightened by bolt, with the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th
Outer panel 1.2.4 and the first tilt prop 1.3.1, the second tilt prop 1.3.2, the 3rd tilt prop 1.3.3, the 4th tilt prop 1.3.4
Connected by an A type contiguous blocks 1.6.1, the 2nd A type contiguous blocks 1.6.2, the 3rd A type contiguous blocks 1.6.3, the 4th A types respectively
Block 1.6.4, the first Type B contiguous block 1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B contiguous block 1.7.3, the connection of the 4th Type B
Block 1.7.4 is connected with；Longitudinal direction-radial transducer 2.1 and longitudinal direction-tangential sensor 2.2 are constituted by seven parts, and longitudinal direction-
The element of radial transducer 2.1 includes first sensor bottom 2.1.1, first sensor side plate 2.1.2, second sensor side plate
2.1.3, first sensor core 2.1.4, the first bottom tension and compression piece 2.1.5, sidepiece tension and compression piece 2.1.6, circular power transmission pad
2.1.7, longitudinal direction-tangential element of sensor 2.2 includes second sensor bottom 2.2.1,3rd sensor side plate 2.2.2, the
Four sensor side plate 2.2.3, second sensor core 2.2.4, the second bottom tension and compression piece, sidepiece shearing piece 2.2.6 and square power transmission
Pad 2.2.7；；Longitudinal direction-tangential sensor 2.2 is to pass longitudinal direction-radial direction with the difference of longitudinal direction-radial transducer 2.1
Sidepiece tension and compression piece 2.1.6 and circle power transmission pad 2.1.7 in sensor 2.1 is changed to same position in longitudinal direction-tangential sensor 2.2
The sidepiece shearing piece 2.2.6 and square power transmission pad 2.2.7 at place, remaining structure is identical.Sensor assembly 2 is passed according to structure
Force characteristic is designed, and the mentality of designing of longitudinal direction-radial transducer 2.1 is as follows：Bottom tension and compression piece 2.1.5 is located at sensor bottom
2.1.1 and sensor core 2.1.4 between, sensor bottom 2.1.1 and sensor core 2.1.4 is tightened so that bottom by six bolts
Portion's tension and compression piece 2.1.5 is compacted；Sidepiece tension and compression piece 2.1.6 be located at first sensor side plate 2.1.2 and sensor core 2.1.4 it
Between, first sensor side plate 2.1.2 and sensor core 2.1.4 is tightened by four bolts so that sidepiece tension and compression piece 2.1.6 quilts
Compress；Circular power transmission pad 2.1.7 is located between second sensor side plate 2.1.3 and sensor core 2.1.4, second sensor side
Plate 2.1.3 and sensor core 2.1.4 is tightened by four bolts so that circle power transmission pad 2.1.7 is compacted；Longitudinal direction-tangential
The mentality of designing of sensor 2.2 is as follows, and bottom tension and compression piece 2.2.5 is located between sensor bottom 2.2.1 and sensor core 2.2.4, passes
Sensor bottom 2.2.1 and sensor core 2.2.4 is tightened by six bolts so that bottom tension and compression piece 2.2.5 is compacted；Sidepiece is cut
Section 2.2.6 is located between first sensor side plate 2.2.2 and sensor core 2.2.4, first sensor side plate 2.2.2 and sensing
Device core 2.2.4 is tightened by four bolts so that sidepiece shearing piece 2.2.6 is compacted；Square power transmission pad 2.2.7 is located at the
Between two sensor side plate 2.2.3 and sensor core 2.2.4, second sensor side plate 2.2.3 and sensor core 2.2.4 passes through four
Individual bolt is tightened so that square power transmission pad 2.2.7 is compacted；Circular power transmission pad 2.1.7 is physical dimension and sidepiece tension and compression
The aluminium flake that piece 2.1.6 is identical and rigidity is close with piezoelectric patches, square power transmission pad 2.2.7 is that physical dimension shears piece with sidepiece
2.2.6 the identical and rigidity aluminium flake close with piezoelectric patches, it is the uniformity and uniformity for ensureing power transmission that both act on；In test
During, first sensor bottom 2.1.1 and second sensor bottom 2.2.1 and first sensor side plate 2.1.2, second sensor side
2.1.3,3rd sensor side plate 2.2.2, the 4th sensor side plate 2.2.3 are remained stationary as because of being connected with construction module, the
The load that one sensor core 2.1.4, the second sensor core 2.2.4 sources of being disturbed are transmitted can produce micro-displacement so that and piezoelectricity
Piece is mutually extruded or mutually sheared so that the first bottom tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5 can be measured vertically
Axial force signal, sidepiece tension and compression piece 2.1.6 can measure horizontal radial force signal, and sidepiece shearing piece 2.2.6 can measure level
Tangential force signal；Four longitudinal direction-radial transducers 2.1 are by the designed mode of connection, it is possible to achieve four longitudinal direction-radial directions are passed
The oscillatory torque of bottom tension and compression piece 2.1.5 opposing connections X-axis and Y-axis, sidepiece tension and compression piece 2.1.6 are to along X-axis and Y-axis in sensor 2.1
The measurement of vibration force；Four longitudinal direction-tangential sensors 2.2 are by the designed mode of connection, it is possible to achieve four longitudinal direction-radial directions
To the vibration force along Z axis, sidepiece shears piece 2.2.6 to oscillatory torque about the z axis to bottom tension and compression piece 2.2.5 in sensor 2.2
Measurement；Groups of sensor 2 is connected by signal transmssion line with Data collection and precessing system 5；Shaken when small sample perturbations source produces
When dynamic, groups of sensor 2 produces six piezoelectric signals, and six sensitivity systems of decoupling are obtained after being demarcated to shake table
Number, real-time six component spaces force signal just can be in the measurements obtained after assigning six acquisition channels, so as to pass through data
Analysis system analyzes the vibration characteristics of disturbing source.
In order to carry out vibration measurement to larger-size vibration source of disturbing, the test platform architecture physical dimension is also larger：
1200mm long, 1200mm wide, 246.5mm high, in order to ensure structure have intrinsic frequency higher must as far as possible reduce structure in
Cavity, based on this consideration, the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outside
Plate 1.2.4, the tilt prop 1.3.4 of the first the 3rd tilt prop 1.3.3 of tilt prop 1.3.1 the second tilt prop 1.3.2 the 4th and interior eight side
There is no the place of sensor to install aluminium ingot additional between shape plate 1.4 to tamp space, and poured with epoxide-resin glue at gap.Survey
Cavity at four angles of power platform need to be processed with same method.
In order that the rigidity of structure meets requirement, longitudinal direction-radial transducer 2.1 and longitudinal direction-tangential sensor, 2.2 use
Case-hardened steel, remainder material is duralumin.
In sensor assembling process, piezoelectric patches group is pressed on first sensor bottom 2.1.1, second sensor with bolt
Bottom, 2.2.1 and first sensor core 2.1.4 second sensor cores, between 2.2.4 and first sensor side plate 2.1.2, second pass
Sensor side plate, 2.2.2 and first sensor core 2.1.4, second sensor core, when between 2.2.4, it is ensured that the stress of piezoelectric patches
It is uniform, therefore, need to ensure that the pretightning force of each screw on same mounting surface is identical with torque spanner.
Vibration test table installation process is as follows：
1) mounting structure module 1 will use bolt to be inserted from the lower surface of base plate 1.1, so as to by the first outer panel 1.2.1, second
Outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4, the first tilt prop 1.3.1, the second tilt prop 1.3.2,
3rd tilt prop 1.3.3, the 4th tilt prop 1.3.4 and interior octagon plate 1.4 are fixed on base plate 1.1, by bolt from base plate
1.1 upper surfaces are inserted, so as to base plate 1.1 is fixed on ground；
2) install sensor module group 2, pacifies in the upper surface of first sensor bottom 2.1.1 and second sensor bottom 2.2.1
Dress piezoelectric patches positioner simultaneously lays the first bottom tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5 respectively, then at the first bottom
First sensor core 2.1.4, and second sensor core are placed respectively on portion's tension and compression piece 2.1.5 and the second bottom tension and compression piece 2.2.5
2.2.4 and by six bolts tighten；Transposition make the side surface of first sensor core 2.1.4 and second sensor core 2.2.4 to
On, piezoelectric patches positioner is installed in the face and sidepiece tension and compression piece 2.1.6 and sidepiece shearing piece 2.2.6 is laid respectively, then in side
First sensor side plate 2.1.2,3rd sensor side plate 2.2.2 are placed on portion's tension and compression piece 2.1.6 and sidepiece shearing piece 2.2.6 simultaneously
Tightened by four bolts；Transposition makes the surface of the opposite side of first sensor core 2.1.4 and second sensor core 2.2.4 again
Upwards, piezoelectric patches positioner is installed in the face and lays circle power transmission pad 2.1.7 and square power transmission pad 2.2.7 respectively,
Second sensor side plate 2.1.3 and the 4th sensor are placed on circular power transmission pad 2.1.7 and square power transmission pad 2.2.7 again
Side plate 2.2.3 is simultaneously tightened by four bolts；So far the installation of groups of sensor 2；
3) groups of sensor 2 is fixed by bolts on base plate 1.1 and interior octagon plate 1.4, blending bolt is by the
One A type contiguous blocks 1.6.1, the 2nd A type contiguous blocks 1.6.2, the 3rd A type contiguous blocks 1.6.3, the 4th A type contiguous blocks 1.6.4 difference
Coupled together with the first outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4, led to
Cross the first Type B contiguous block 1.7.1, the second Type B contiguous block 1.7.2, the 3rd Type B contiguous block 1.7.3, the 4th Type B contiguous block 1.7.4
Coupled together with the tilt prop 1.3.4 of the first the 3rd tilt prop 1.3.3 of tilt prop 1.3.1 the second tilt prop 1.3.2 the 4th；
4) space aluminium ingot in structure is filled up and uses epoxide resin AB glue to pour, by angle fillet 1.5.1 on first,
Angle fillet 1.5.2 on second, angle fillet 1.5.3 on the 3rd, angle fillet 1.5.4 bolts and first on the 4th
Outer panel 1.2.1, the second outer panel 1.2.2, the 3rd outer panel 1.2.3, the 4th outer panel 1.2.4 and the first tilt prop 1.3.1
The tilt prop 1.3.4 of second the 3rd tilt prop 1.3.3 of tilt prop 1.3.2 the 4th are connected；
5) loading disk 3 is connected with groups of sensor 2, has so far completed the assembling of whole ergograph.Using
Modularized design, assembling is simple and process is reversible.
If the hole position of ground mounting surface changes, can install pinboard additional to adapt to different grounds in the bottom of base plate 1.1
Mounting surface.
The bolt for needing the place of being bolted coupling part must as far as possible be tightened in the range of intensity permission, with
Improve the rigidity of the measuring system, it is ensured that its certainty of measurement.
Because piezoelectric patches self-characteristic can change with the change of time and environment, so that measurement result is drifted about,
So needs are periodically demarcated to ergograph.The mode connects for screw of disk 4 will be demarcated when demarcating on loading disk 3, use can be used
Hammering method or other scaling methods are demarcated.
Non-elaborated part of the present invention belongs to techniques well known.
The above, part specific embodiment only of the present invention, but protection scope of the present invention is not limited thereto, and appoints
What those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.
Claims (10)
1. a kind of high precision high rigidity heavy load piezoelectric type decouples microvibration measuring system, it is characterised in that：The system includes knot
Structure module (1), groups of sensor (2), loading disk (3) demarcates disk (4) and Data collection and precessing system (5)；Structure mould
Block (1) by base plate (1.1), the first outer panel (1.2.1), the second outer panel (1.2.2), the 3rd outer panel (1.2.3), the 4th outside
Side plate (1.2.4), the first tilt prop (1.3.1), the second tilt prop (1.3.2), the 3rd tilt prop (1.3.3), the 4th tilt prop
(1.3.4), interior octagon plate (1.4), angle fillet (1.5.1) on first, angle fillet (1.5.2), the 3rd on second
Upper angle fillet (1.5.3), angle fillet (1.5.4), A types contiguous block (1.6.1), the connection of the 2nd A types on the 4th
Block (1.6.2), the 3rd A types contiguous block (1.6.3), the 4th A types contiguous block (1.6.4), the first Type B contiguous block (1.7.1), second
Type B contiguous block (1.7.2), the 3rd Type B contiguous block (1.7.3), the 4th Type B contiguous block (1.7.4) composition；Groups of sensor
(2) it is divided into four longitudinal direction-radial transducers (2.1) and four longitudinal direction-tangential sensors (2.2), wherein four longitudinal direction-radial directions are passed
Sensor (2.1) is located on four 90 degree of directions side of interior octagon plate (1.4) outer surface respectively, with loading disk (3), base plate
(1.1), interior octagon plate (1.4) is tightened by bolt, with the first outer panel (1.2.1), the second outer panel (1.2.2), the 3rd
Outer panel (1.2.3), the 4th outer panel (1.2.4) pass through A types contiguous block (1.6.1), the 2nd A type contiguous blocks respectively
(1.6.2), the 3rd A types contiguous block (1.6.3), the 4th A types contiguous block (1.6.4) are connected with；Four longitudinal direction-tangential sensings
Device (2.2) is located on four 45 degree of directions side of interior octagon plate (1.4) outer surface respectively, with loading disk (3), base plate
(1.1), interior octagon plate (1.4) is tightened by bolt, oblique with the second tilt prop of the first tilt prop (1.3.1) (1.3.2) the 3rd
The tilt prop (1.3.4) of fagging (1.3.3) the 4th passes through the first Type B contiguous block (1.7.1), the second Type B contiguous block respectively
(1.7.2), the 3rd Type B contiguous block (1.7.3), the 4th Type B contiguous block (1.7.4) are connected with；Longitudinal direction-radial transducer
(2.1) it is made up of seven parts, i.e. first sensor bottom (2.1.1), first sensor side plate (2.1.2), second sensor side plate
(2.1.3), first sensor core (2.1.4), the first bottom tension and compression piece (2.1.5), sidepiece tension and compression piece (2.1.6) and circular biography
Power pad (2.1.7) is constituted；Longitudinal direction-tangential sensor (2.2) is also made up of seven parts, i.e. second sensor bottom (2.2.1), the
Three sensor side plates (2.2.2), the 4th sensor side plate (2.2.3), second sensor core (2.2.4), the second bottom tension and compression piece
(2.2.5), sidepiece shear piece (2.2.6) and square power transmission pad (2.2.7) composition；Longitudinal direction-tangential sensor (2.2) with it is vertical
To the difference of-radial transducer (2.1) be by sidepiece tension and compression piece (2.1.6) in longitudinal direction-radial transducer (2.1) with
The sidepiece that circular power transmission pad (2.1.7) is changed in longitudinal direction-tangential sensor (2.2) at same position shear piece (2.2.6) with
Square power transmission pad (2.2.7), remaining structure is identical；Sensor assembly (2) is designed according to structure force-transfer characteristic, is indulged
It is as follows to-radial transducer (2.1) mentality of designing：Bottom tension and compression piece (2.1.5) are located at sensor bottom (2.1.1) and sensor core
Between (2.1.4), sensor bottom (2.1.1) and sensor core (2.1.4) are tightened by six bolts so that bottom tension and compression piece
(2.1.5) is compacted；Sidepiece tension and compression piece (2.1.6) be located at first sensor side plate (2.1.2) and sensor core (2.1.4) it
Between, first sensor side plate (2.1.2) and sensor core (2.1.4) is tightened by four bolts so that sidepiece tension and compression piece
(2.1.6) is compacted；Circular power transmission pad (2.1.7) be located at second sensor side plate (2.1.3) and sensor core (2.1.4) it
Between, second sensor side plate (2.1.3) and sensor core (2.1.4) are tightened by four bolts so that circular power transmission pad
(2.1.7) is compacted；Longitudinal direction-tangential sensor (2.2) mentality of designing is as follows, and bottom tension and compression piece (2.2.5) are located at sensor bottom
Between (2.2.1) and sensor core (2.2.4), sensor bottom (2.2.1) and sensor core (2.2.4) are tightened by six bolts
So that bottom tension and compression piece (2.2.5) are compacted；Sidepiece shears piece (2.2.6) and is located at first sensor side plate (2.2.2) and passes
Between sensor core (2.2.4), first sensor side plate (2.2.2) and sensor core (2.2.4) by four bolts tighten so as to
Make sidepiece shear piece (2.2.6) to be compacted；Square power transmission pad (2.2.7) is located at second sensor side plate (2.2.3) and sensing
Between device core (2.2.4), second sensor side plate (2.2.3) and sensor core (2.2.4) tightened by four bolts so that
Square power transmission pad (2.2.7) is compacted；Circular power transmission pad (2.1.7) is physical dimension and sidepiece tension and compression piece (2.1.6) phase
The same and rigidity aluminium flake close with piezoelectric patches, square power transmission pad (2.2.7) is that physical dimension and sidepiece shear piece (2.2.6) phase
The same and rigidity aluminium flake close with piezoelectric patches, it is the uniformity and uniformity for ensureing power transmission that both act on；In test process,
First sensor bottom (2.1.1) and second sensor bottom (2.2.1) and first sensor side plate (2.1.2), second sensor side
(2.1.3), 3rd sensor side plate (2.2.2), the 4th sensor side plate (2.2.3) with construction module because being connected therefore keeping not
Dynamic, the load that first sensor core (2.1.4), second sensor core (2.2.4) source of being disturbed are transmitted can produce micro-displacement
So as to mutually extrude or mutually shear with piezoelectric patches so that the first bottom tension and compression piece (2.1.5) and the second bottom tension and compression piece
(2.2.5) can measure axial direction force signal vertically, and sidepiece tension and compression piece (2.1.6) can measure horizontal radial force signal, and sidepiece is cut
Section (2.2.6) can measure horizontal tangential force signal；Four longitudinal direction-radial transducers (2.1) are by designed wiring side
Formula, it is possible to achieve the oscillatory torque of bottom tension and compression piece (2.1.5) opposing connection X-axis and Y-axis in four longitudinal direction-radial transducers (2.1),
Sidepiece tension and compression piece (2.1.6) are to the measurement along X-axis and the vibration force of Y-axis；Four longitudinal direction-tangential sensors (2.2) are by set
The mode of connection of meter, it is possible to achieve bottom tension and compression piece (2.2.5) are to the vibration along Z axis in four longitudinal direction-radial transducers (2.2)
Power, sidepiece shears measurement of the piece (2.2.6) to oscillatory torque about the z axis；Groups of sensor (2) is by signal transmssion line and number
It is connected with processing system (5) according to collection；When small sample perturbations source produces vibration, groups of sensor (2) produces six piezoelectricity letters
Number, six sensitivity coefficients of decoupling being obtained after being demarcated to shake table, just can surveyed after six acquisition channels will be assigned
Real-time six component spaces force signal is obtained in amount, so as to analyze the vibration characteristics of disturbing source by data analysis system.
2. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：In order to carry out vibration measurement to larger-size vibration source of disturbing, the test platform architecture physical dimension is also larger：It is long
1200mm, 1200mm wide, 246.5mm high, in order to ensure structure have intrinsic frequency higher must as far as possible reduce structure in
Cavity, based on this consideration, in the first outer panel (1.2.1), the second outer panel (1.2.2), the 3rd outer panel (1.2.3), the 4th
Outer panel (1.2.4), the tilt prop of the first tilt prop (1.3.1) the second tilt prop (1.3.2) the 3rd tilt prop (1.3.3) the 4th
There is no the place of sensor to install aluminium ingot additional between (1.3.4) and interior octagon plate (1.4) to tamp space, and used at gap
Epoxide-resin glue is poured；Cavity at four angles of ergograph need to be processed with same method.
3. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：In order that the rigidity of structure meets requiring, longitudinal direction-radial transducer (2.1) uses table with longitudinal direction-tangential sensor (2.2)
Face hardened steel, remainder material is duralumin.
4. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：In sensor assembling process, piezoelectric patches group is pressed on first sensor bottom (2.1.1), second sensor bottom with bolt
Between (2.2.1) and first sensor core (2.1.4) second sensor core (2.2.4) and first sensor side plate (2.1.2),
When between two sensor side plates (2.2.2) and first sensor core (2.1.4), second sensor core (2.2.4), it is ensured that piezoelectricity
The stress of piece is uniform, therefore, need to ensure that the pretightning force of each screw on same mounting surface is identical with torque spanner
's.
5. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：Vibration test table installation process is as follows：
1) mounting structure module (1) inserts bolt from base plate (1.1) lower surface, so as to by the first outer panel (1.2.1), second
Outer panel (1.2.2), the 3rd outer panel (1.2.3), the 4th outer panel (1.2.4), the first tilt prop (1.3.1), the second diagonal brace
Plate (1.3.2), the 3rd tilt prop (1.3.3), the 4th tilt prop (1.3.4) and interior octagon plate (1.4) are fixed on base plate
(1.1) on, then bolt is inserted from base plate (1.1) upper surface, so as to base plate (1.1) is fixed on ground；
2) install sensor module group (2), the upper surface of (2.1.1) and second sensor bottom (2.2.1) at first sensor bottom
Piezoelectric patches positioner is installed and the first bottom tension and compression piece (2.1.5) and the second bottom tension and compression piece (2.2.5) are laid respectively, then
First sensor core (2.1.4) and are placed in first bottom tension and compression piece (2.1.5) and the second bottom tension and compression piece (2.2.5) respectively
Two sensor cores (2.2.4) are simultaneously tightened by six bolts；Transposition makes first sensor core (2.1.4) and second sensor core
The side surface of (2.2.4) upwards, installs piezoelectric patches positioner and lays sidepiece tension and compression piece (2.1.6) and sidepiece respectively in the face
Shearing piece (2.2.6), then shear placement first sensor side plate on piece (2.2.6) in sidepiece tension and compression piece (2.1.6) and sidepiece
(2.1.2), 3rd sensor side plate (2.2.2) are simultaneously tightened by four bolts；Again transposition make first sensor core (2.1.4) and
Upwards, piezoelectric patches positioner is installed in the face and circle is laid respectively in the surface of the opposite side of second sensor core (2.2.4)
Shape power transmission pad (2.1.7) and square power transmission pad (2.2.7), then in circular power transmission pad (2.1.7) and square power transmission pad
Second sensor side plate (2.1.3) and the 4th sensor side plate (2.2.3) are placed on (2.2.7) and is tightened by four bolts；
So far groups of sensor (2) installation；
3) groups of sensor (2) is fixed by bolts on base plate (1.1) and interior octagon plate (1.4), blending bolt passes through
First A types contiguous block (1.6.1), the 2nd A types contiguous block (1.6.2), the 3rd A types contiguous block (1.6.3), the 4th A type contiguous blocks
(1.6.4) respectively with the first outer panel (1.2.1), the second outer panel (1.2.2), the 3rd outer panel (1.2.3), the 4th outer panel
(1.2.4) is coupled together, by the first Type B contiguous block (1.7.1), the second Type B contiguous block (1.7.2), the 3rd Type B contiguous block
(1.7.3), the 4th Type B contiguous block (1.7.4) and the first tilt prop (1.3.1) the second tilt prop (1.3.2) the 3rd tilt prop
(1.3.3) the 4th tilt prop (1.3.4) is coupled together；
4) space aluminium ingot in structure is filled up and uses epoxide resin AB glue to pour, by angle fillet on first (1.5.1), the
Angle fillet (1.5.2) on two, angle fillet (1.5.3) on the 3rd, on the 4th angle fillet (1.5.4) with bolt with
First outer panel (1.2.1), the second outer panel (1.2.2), the 3rd outer panel (1.2.3), the 4th outer panel (1.2.4) and first
The tilt prop (1.3.4) of tilt prop (1.3.1) the second tilt prop (1.3.2) the 3rd tilt prop (1.3.3) the 4th is connected；
5) loading disk (3) is connected with groups of sensor (2), has so far completed the assembling of whole ergograph, used
Modularized design, assembling is simple and process is reversible.
6. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：If the hole position of ground mounting surface changes, pinboard can be installed additional in base plate (1.1) bottom and installed with adapting to different grounds
Face.
7. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：The bolt for needing the place of being bolted coupling part must as far as possible be tightened in the range of intensity permission, to improve
The rigidity of the measuring system, it is ensured that its certainty of measurement.
8. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：Because piezoelectric patches self-characteristic can change with the change of time and environment, so that measurement result is drifted about, so needing
Periodically ergograph is demarcated, disk (4) mode connects for screw will be demarcated in demarcation on loading disk (3), hammer can be used
Striking or other scaling methods are demarcated.
9. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：Under so big physical dimension：1200mm long, 1200mm wide, 246.5mm high, its rigidity can be super up to first natural frequency
900Hz is crossed, certainty of measurement can reach 0.01N and 0.001Nm.
10. high precision high rigidity heavy load piezoelectric type according to claim 1 decouples microvibration measuring system, and its feature exists
In：Arranged by the space to sensor and the various combination of holding wire is designed, six voltages for having decoupled can be directly obtained
Signal, directly measures the component force signal F of space six in real time by setting in the channel by sensitivity coefficient obtained by calibratingx、Fy、
Fz、Mx、My、Mz。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525508A (en) * | 2020-11-24 | 2021-03-19 | 北京航空航天大学 | Quasi-static radial rigidity testing device and method for circular metal rubber damper |
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| 陈江攀 等: "一种应变式超低频微振动测试台", 《振动与冲击》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525508A (en) * | 2020-11-24 | 2021-03-19 | 北京航空航天大学 | Quasi-static radial rigidity testing device and method for circular metal rubber damper |
| CN112525508B (en) * | 2020-11-24 | 2021-09-03 | 北京航空航天大学 | Quasi-static radial rigidity testing device and method for circular metal rubber damper |
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| CN106768288B (en) | 2019-05-03 |
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