CN104567934A - Jig for vibration test of fiber-optic gyroscope and testing method - Google Patents
Jig for vibration test of fiber-optic gyroscope and testing method Download PDFInfo
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- CN104567934A CN104567934A CN201510032789.3A CN201510032789A CN104567934A CN 104567934 A CN104567934 A CN 104567934A CN 201510032789 A CN201510032789 A CN 201510032789A CN 104567934 A CN104567934 A CN 104567934A
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- 238000012360 testing method Methods 0.000 title claims abstract description 94
- 238000009434 installation Methods 0.000 claims abstract description 45
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 38
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 abstract 3
- 230000008859 change Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004606 Fillers/Extenders Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
- G01C25/005—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
-
- 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
- G01M7/04—Monodirectional test stands
Abstract
The invention discloses a jig for a vibration test of a fiber-optic gyroscope and a testing method of the vibration test. The jig comprises a jig body, wherein two vertical planes of the jig are respectively provided with a handle; the side opposite to the handle is provided with a jig fixing substrate, and other sides are respectively provided with a gyroscope substrate and a gyroscope installation location mark; two adjacent vertical sides on the jig body are regarded as installation fixing sides, and other sides are provided with the gyroscope through the gyroscope substrate; during vibration test, the two installation fixing sides are respectively regarded as installation bases to be twice tested; after second round of test is executed, the jig rotates by 90 degrees in a horizontal plane along an anticlockwise or clockwise direction, and then third round of test is executed. The jig is specifically designed, so that the gyroscope can be fixed to the jig without using changeover measures, the installing position of the gyroscope on the jig is constant, the stability of the gyroscope is increased, the gyroscope can not loosen during vibration and the test accuracy is improved.
Description
Technical field
The invention belongs to the technical field of measurement and test of optical fibre gyro and Fibre Optical Sensor, a kind of frock that particularly in optical fibre gyro environmental test, vibration test uses.
Background technology
At present, middle low-precision optical fiber gyro strap-down inertial measurement system has moved towards the practical stage from laboratory, but the application of high-precision optical fiber gyro quick-connecting inertia measurement system is still limited to the impact of environmental baseline, especially vibration condition.In theory, compared with mechanical gyro, the features such as the structure of whole solid state of optical fibre gyro, without spin movable part determine it and have shock resistance, anti-vibration, high reliability.But in actual applications, the vibration of the fiber optic loop STRESS VARIATION that shock and vibration causes, device tail optical fiber and mesomerism all may bring gyro output error, cause the dynamic error of gyro under vibrational state to increase, thus cause the reduction of fibre optic gyroscope precision.
Existing optical fibre gyro vibration test frock used is the unitized construction with card extender between frock main body and gyro.This tool structure has several shortcoming: 1, need fastening screw many, so cause the probability of screw fastening deficiency larger; 2, frock moves inconvenience, is unfavorable for operation when changing gyroscopic vibration direction; 3, gyro riding position is relatively more random, and it is uncertain that orientation laid by gyro, in follow-up data inquiry, do not have retrospective.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide a kind of for the vibration test frock of optical fibre gyro in environmental test and test method, make can ensure gyro data consistance and retrospective in gyroscope vibration-testing, in order to increase work efficiency and to increase stability and the reliability of test.
The present invention is mainly achieved through the following technical solutions: a kind of for optical fibre gyro vibration test frock, comprise a frock body, frock body is provided with handle, gyro pedestal, gyro fixing screw hole, frock fixing screw hole, frock fixed pedestal, gyro installation azimuth mark; Frock body is got two adjacent faces vertical each other for installing stationary plane, its lap installs gyro by gyro pedestal; With two, stationary planes are installed respectively during vibration-testing and carry out twice test for installation foundation; On gyro pedestal side, described gyro installation azimuth mark is set.
Further, described frock body is square build or cuboid-type, and two adjacent faces of installing gyro are vertical plane, and two relative faces are parallel surface.
Further, described handle has two groups, is arranged at the opposite of two described installation stationary planes respectively.
Further, described gyro pedestal, it is the shape according to gyro base, based on frock body, the square-outside and round-inside that frock body sets out becomes the caulking groove of domatic gradual transition, the edge of described caulking groove is dispersed with described gyro fixing screw hole, and the position, fixed orifice hole of the gyro that the Kong Weiyu of described gyro fixing screw hole installs is corresponding.
Further, described caulking groove and gyro meet following installation dimension condition:
Y＝y
d
1+d
2＝D
Wherein: Y is the pitch-row of gyro fixing screw hole in frock, y is the fixed orifice distance on gyro base, d
1for gyro base thickness, d
2for gyro outer cover thickness, D is the degree of depth of gyro pedestal.
Further, the outward flange of described gyro pedestal is provided with gyro installation azimuth mark, the data line interface of described gyro installation azimuth mark and gyro is on same direction.
Further, described two ribs installed stationary plane and be connected mutually, for having the chamfering rib of chamfering.
Further, from described installation stationary plane to its opposite, offer the frock fixing screw hole of several break-through, described fixing screw hole is shoulder hole.
Further, on described installation stationary plane, the position at frock fixing screw hole place, is provided with frock fixed pedestal, described frock fixing screw hole same break-through frock fixed pedestal.
The present invention also provides a kind of and utilizes described frock to carry out the method tested, and the steps include:
1) first being used by gyroscope screw to be separately fixed at, removing installs outside stationary plane on any orthogonal, data line from gyro top cover out, according to gyro installation azimuth mark place cabling;
2) installing stationary plane according to one of them is surface of contact, and frock is installed on worktable, with screw to pierce into from frock top tighten fixing;
3), after having fixed gyroscope and frock, first round vibration-testing is started;
4) after completing first round vibration-testing, unloaded by the screw that frock is connected with worktable, gyro need not unload, and utilizes handle that frock is overturn 90 °, and another frock stationary plane is contacted with work top, and then fixing, starts second and takes turns vibration-testing;
5) complete second take turns vibration-testing after, the screw that frock is connected with worktable is unloaded, utilize handle by frock in surface level along counterclockwise or after clockwise direction rotates 90 °, then to fix, then start third round vibration-testing.
When test is taken turns in first round test and second, complete the Orientation differences test of gyroscope in vertical plane, in third round test, complete the Orientation differences test of gyroscope in surface level
The advantage that the present invention compares existing frock outstanding is:
1, the present invention is by the peculiar design to the gyro installation pedestal of frock, just can gyro oneself be fixed in frock without the need to using switching measure, gyroscope installation site in frock can be fixed, add the steadiness of gyro, avoid gyro loosening in vibration processes, improve the accuracy of test.
2, the present invention tests multiple gyro by the design of installed surface multiple in frock is disposable, improves work efficiency.
3, on gyro installation position, unified adjustment notch is determined, make gyro installation orientation consistent, and ensure axially consistent, ensure that consistance and the trackability in the corresponding gyroscopic vibration direction of test data, this is with gyroscope installation shaft in existing test to not Stationary liquid ratio, and the regular and correspondence of test data is guaranteed.
4, the present invention utilizes tool structure body own characteristic, no longer needs the screw laying down fastening gyro in whole test; Have radian and handle when rotary fixture to provide convenient, enhance productivity greatly, the simplification of manual operation improves consistance and the reliability of test data, and removes card extender operation, reduces and connects illusive factor.
5, in method of testing, be only pull, rotary fixture respectively once, just can complete the test in all upper directions of gyro X, Y, Z simultaneously, simple to operation.
Other features and advantages of the present invention will be set forth in the following description, and object of the present invention and other advantages embody by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing only for illustrating the object of specific embodiment, and does not think limitation of the present invention, and in whole accompanying drawing, identical reference symbol represents identical parts.
Fig. 1 is frock shaft side figure one, sees the end face of frock, and right flank above;
Fig. 2 is structural representation frock being installed gyro;
Fig. 3 is frock shaft side figure two, is to have overturn 180 degree on the basis of Fig. 1;
Fig. 4 is the cut-open view of frock fixing screw hole;
Fig. 5 is the frock bearing change figure that test is taken turns in first round test and second;
Fig. 6 is the second frock bearing change figure taking turns that third round test is arrived in test.
Embodiment
Below in conjunction with drawings and Examples, the present invention program is described in detail.Wherein, accompanying drawing forms the application's part, for supplementary explanation technical solution of the present invention.
The present invention is directed to vibration-testing in interferometric fiber optic gyroscope environmental test used, design a effective vibration tool and set up the working specification of science, to reducing the impact that ambient vibration causes Gyro Precision to greatest extent, and improve the work efficiency in testing experiment simultaneously.
Vibration test frock provided by the invention, as shown in Figure 1, comprises the frock body 1 of a square build or cuboid-type, the hexahedron that namely every two adjacent surfaces is vertical all each other.This frock body 1 does not have electromagnetic shielding requirements, so can adopt aluminum alloy materials (2Al2-T4), in order to make the resonance frequency of frock qualified, do not affect gyroscopic vibration, frock body is solid; Frock physical dimension is not strict with, but unsuitable too small, otherwise resonance can not be up to standard.Test tool, based on frock body 1, frock body 1 is provided with handle 2, gyro pedestal 3, gyro fixing screw hole 4, frock fixing screw hole 5, frock fixed pedestal 6, gyro installation azimuth mark 7 etc.
Described handle 2 has two groups, be arranged at along on two adjacent in frock reverses direction vertical each other faces respectively, and it is relative with two stationary planes of frock respectively, as on end face set in Fig. 1 and front, the desired location of two groups of handles is relevant to the position that tool pedestal and frock overturn chamfering.
On six faces of frock body, removing two faces be wherein used for fixing outside, all the other 4 faces can arrange gyro pedestal 3, and quantity is not limit, if area can arrange two enough greatly, area is little, can arrange one.Gyro pedestal 3 as shown in FIG., according to the shape of gyro, rely on the thickness of frock body, gyro pedestal 3 is the caulking groove of square-outside and round-inside domatic gradual transition, caulking groove is the place of placing gyro, and its outside dimension is similar with gyro, larger than gyro physical dimension, inner circle is the part fallen into into, is to ensure that gyro reference face keeps a surface level.The edge of caulking groove is dispersed with 4 gyro fixing screw holes 4, and the position of these 4 screw holes is consistent with the position of mounting hole on installed gyro, and gyro is fixed on installation position by 4 screws, and in whole test, gyro is installed no longer repeatedly.The pedestal of square-outside and round-inside caulking groove shape and the base shape of gyro match, and gyro can be made so to be firmly fitted on flute profile pedestal, increase the stability of gyro, as shown in Figure 1.
In embodiment, the size of the caulking groove of square-outside and round-inside domatic gradual transition is, the outer square length of side is 130 × 130mm, the degree of depth of domatic gradual transition is 9.5mm, the fixed orifice of 4 screws is apart from being 94mm, and the outer square length of side of gyro joined together is 120 × 120mm, and gyro base thickness is 7mm, outer cover wall thickness is 2.5mm, and fixed orifice distance is 94mm.
Gyro pedestal thus in vibration tool and gyro meet following installation dimension condition:
Y＝y
d
1+d
2＝D
Wherein: Y is the pitch-row of gyro fixing screw hole 4 in frock, y is the fixed orifice distance on gyro base, d
1for gyro base thickness, d
2for gyro outer cover thickness, D is the degree of depth of gyro pedestal 3.
In addition, on each gyro pedestal 3 side, be provided with a gyro installation azimuth mark 7, as a little corner block at the caulking groove edge in figure.This mark determines the installation position of gyro, the data line interface 9 of it and gyro is on same direction, as long as the data line interface 9 of gyro is towards the direction of gyro installation azimuth mark 7 during installation, the orientation of gyro just determines at last, and gyro installation as shown in Figure 2.Each gyro when mounted orientation is consistent, contributes to the consistance of each gyro test in test process like this.Get triangular orientation mark in embodiment, in reality, also can get other modes.Gyro installation azimuth mark 7 is exactly that frock walks line index, embody the consistance of gyroscope test data and each direction of vibration in vibration test, because the direction of each test gyroscopic vibration is certain, according to the words that cabling mode fixes, the axis that three vibrations of gyro are corresponding is exactly known, and data and direction are consistent thus.If the position of the installation position mark 7 on each gyro base position side is consistent, then the installation position of all gyros is made all to achieve consistance.
To choose on frock body two adjacent vertical planes as installation stationary plane, as the stationary plane a in Fig. 3 and stationary plane b.According to aforementioned, these two stationary planes are relative with one group of handle separately, and if stationary plane a and first group of handle place plane is opposite, stationary plane b and second group of handle place plane is opposite.When pulling handle, corresponding stationary plane will overturn.
Further, by the rib that this two stationary planes are connected mutually, be processed into the chamfering rib c with certain chamfering, this chamfering can be right angle chamfering, but is more preferably circular arc chamfering.The benefit making chamfering rib can avoid like this causing gouge to worktable in frock switching process, also easily overturn, otherwise right-angle surface is easily skidded, circular arc chamfering has the transition of rounding nature, can be less to the damage of work top, circular arc chamfering R is 10mm.
Four angles place on these two stationary planes is respectively arranged with frock fixing screw hole 5, and fixed orifice distance is 176.78mm.All screw holes are break-through opposite face (face at handle place) all, and this is in order to screw sinks at the bottom of hole from the face (end face namely operation) at handle place, is then fastened on worktable through bottom surface.Further say that the position at 4 screw hole places on stationary plane arranges 4 pieces of frock fixed pedestals 6, arrange the object of pedestal, one is avoid frock stationary plane directly to contact with work top, thus causes frock stationary plane to wear and tear, cause frock air spots, and then make test data inaccurate; On the other hand, because frock fixed pedestal 6 total area installed additional is less than former stationary plane area, so little with the contact area of worktable, also reduce frictional resistance when overturning like this, making upset become easy.Frock fixing screw hole 5 is through described frock fixed pedestal 6.4 screws pierce into from frock fixing screw hole 5 top, are then tightened in the threaded hole on worktable, just frock can be fixed on worktable.Further, the cut-open view of frock fixing screw hole 5 as shown in Figure 4, is a shoulder hole, aperture, two ends respectively: Φ
1for 18mm, length 240mm; Φ
2for 11mm, length 10mm, screw can be sunken in shoulder hole, and screw that like this can be long, short and small screw also reduces the possibility that screw fractures.
Gyro is installed on this basis and just can carries out vibration test.All gyro can be installed in 4 faces, so each test just increase gyro quantity as much as possible, make once to test can test multiple gyroaxis to vibration data, raise the efficiency.
Here is the method for installing gyroscopic vibration test:
1) first, the screw getting 4 gyroscopes use M6 is separately fixed on 4 faces outside removing installation stationary plane, as the end face in figure, front and left and right side, data line from gyro top cover out, according to triangle mark place cabling, triangle mark positional distance and angle can specify according to cabling.Because the data cabling of every gyro is all unified technique, if so the gyro installation azimuth mark position on each gyro pedestal 3 side is consistent, the axis also thereupon unification of gyroscope in frock.
2) stationary plane is installed for surface of contact according to Fig. 1 with one of them, frock is installed on worktable, at 4 angles with 4 M10 screws to pierce into from top tighten fixing.
3) after having fixed gyroscope and frock, just first round vibration-testing can be started.The test bit of first round test is exactly the position based on one of them installation stationary plane as shown in Figure 1.The vibration of different frequency and amplitude is used to measure gyro output-index under vibration and working condition by shaking table.
4) after completing first round vibration-testing, the screw that frock 4 angles are connected with worktable is unloaded, notice that gyro need not unload, utilize handle that frock is overturn 90 °, another frock stationary plane is contacted with work top, and namely the back side of original frock is become bottom surface, front becomes end face, use M10 screw to be fixed on work top at frock 4 angles again, just can start second and take turns vibration-testing.
First round test and second takes turns the frock bearing change of test as shown in Figure 5.
5) complete second take turns vibration-testing after, be equivalent to complete the test of gyro in vertical plane, then the screw at 4 angles in frock is unloaded, frock end face (front time initial) is now utilized to utilize handle that frock is rotated 90 ° along (or clockwise also can) counterclockwise in surface level, use M10 screw to be fixed on worktable at frock 4 angles again, just can start third round vibration-testing.
Second takes turns test arrives the frock bearing change of third round test as shown in Figure 6.
Third round test essence completes the test of gyro in surface level, and after completing third round vibration-testing, 4 gyrostatic X, Y, Z-directions all have passed through vibration-testing, and often the direction of vibration of corresponding every the gyro of wheel test is also fixing.
Key of the present invention is to advise and defines the installation site of gyroscope in frock, and gyroscope is directly fastened on frock body.Designed by the mechanical outline of uniqueness, just ensure that gyroscope test data and the corresponding of each direction of vibration and consistance in vibration test.Thus realize the trackability of gyroscope test data for gyroscopic vibration direction.Frock of the present invention is not only enhanced productivity, and also reduces production cost, ensure that the reliability of each test.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (10)
1., for an optical fibre gyro vibration test frock, it is characterized in that:
Comprise a frock body (1), frock body (1) is provided with handle (2), gyro pedestal (3), gyro fixing screw hole (4), frock fixing screw hole (5), frock fixed pedestal (6), gyro installation azimuth mark (7);
Frock body (1) is got two adjacent faces vertical each other for installing stationary plane, its lap installs gyro by gyro pedestal (3); With two, stationary planes are installed respectively during vibration-testing and carry out twice test for installation foundation;
On gyro pedestal (3) side, described gyro installation azimuth mark (7) is set.
2. frock according to claim 1, is characterized in that: described frock body (1) is square build or cuboid-type, and two adjacent faces of installing gyro are vertical plane, and two relative faces are parallel surface.
3. frock according to claim 1, is characterized in that: described handle (2) has two groups, is arranged at the opposite of two described installation stationary planes respectively.
4. frock according to claim 1, it is characterized in that: described gyro pedestal (3), it is the shape according to gyro base, based on frock body (1), the square-outside and round-inside that frock body (1) sets out becomes the caulking groove of domatic gradual transition, the edge of described caulking groove is dispersed with described gyro fixing screw hole (4), and the position, fixed orifice hole of the gyro that the Kong Weiyu of described gyro fixing screw hole (4) installs is corresponding
Described caulking groove and gyro meet following installation dimension condition:
Y＝y
d
1+d
2＝D
Wherein: Y is the pitch-row of gyro fixing screw hole (4) in frock, y is the fixed orifice distance on gyro base, d
1for gyro base thickness, d
2for gyro outer cover thickness, D is the degree of depth of gyro pedestal (3).
5. the frock according to claim 1 or 4, it is characterized in that: the outward flange of described gyro pedestal (3) is provided with gyro installation azimuth mark (7), described gyro installation azimuth mark (7) is on same direction with the data line interface of gyro.
6. frock according to claim 1, is characterized in that: described two ribs installed stationary plane and be connected mutually, for having the chamfering rib of chamfering.
7. the frock according to claim 1 or 3 or 6, is characterized in that: from described installation stationary plane to its opposite, offers the frock fixing screw hole (5) of several break-through, and described frock fixing screw hole (5) is shoulder hole.
8. frock according to claim 7, it is characterized in that: the position at frock fixing screw hole (5) place on described installation stationary plane, be provided with frock fixed pedestal (6), the same break-through frock fixed pedestal (6) of described frock fixing screw hole (5).
9. utilize the described frock of one of claim 1 to 8 to carry out the method tested, it is characterized in that:
1) first, being used by gyroscope screw to be separately fixed at, removing installs outside stationary plane on any orthogonal, data line from gyro top cover out, according to gyro installation azimuth mark place cabling;
2) installing stationary plane according to one of them is surface of contact, and frock is installed on worktable, with screw to pierce into from frock top tighten fixing;
3), after having fixed gyroscope and frock, first round vibration-testing is started;
4) after completing first round vibration-testing, unloaded by the screw that frock is connected with worktable, gyro need not unload, and utilizes handle that frock is overturn 90 °, and another frock stationary plane is contacted with work top, and then fixing, starts second and takes turns vibration-testing;
5) complete second take turns vibration-testing after, the screw that frock is connected with worktable is unloaded, utilize handle by frock in surface level along counterclockwise or after clockwise direction rotates 90 °, then to fix, then start third round vibration-testing.
10. test method according to claim 9, is characterized in that: when test is taken turns in first round test and second, completes the Orientation differences test of gyroscope in vertical plane, completes the Orientation differences test of gyroscope in surface level in third round test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032789.3A CN104567934B (en) | 2015-01-22 | 2015-01-22 | Jig for vibration test of fiber-optic gyroscope and testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032789.3A CN104567934B (en) | 2015-01-22 | 2015-01-22 | Jig for vibration test of fiber-optic gyroscope and testing method |
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| Publication Number | Publication Date |
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| CN104567934A true CN104567934A (en) | 2015-04-29 |
| CN104567934B CN104567934B (en) | 2017-05-24 |
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| CN105203284A (en) * | 2015-09-23 | 2015-12-30 | 河北汉光重工有限责任公司 | Experimental device and method suitable for vibration and impact of small-sized laser gyroscopes |
| CN105928678A (en) * | 2016-04-18 | 2016-09-07 | 中国空间技术研究院 | CCD image sensor vibration and impact test fixture |
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