CN204359818U - A kind of g sensor calibration test fixture - Google Patents
A kind of g sensor calibration test fixture Download PDFInfo
- Publication number
- CN204359818U CN204359818U CN201420752613.6U CN201420752613U CN204359818U CN 204359818 U CN204359818 U CN 204359818U CN 201420752613 U CN201420752613 U CN 201420752613U CN 204359818 U CN204359818 U CN 204359818U
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- circular clamping
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Abstract
The utility model relates to the calibration of certain type helicopter rotor system a kind of flight, load test test g sensor, for the fixture that g sensor calibration is installed, belong to measurement and calibration technical field, comprising: clamp nut, back-up ring, rolling bearing, T-shaped lining, circular clamping table top, spring, contiguous block, trip bolt, column handle, sleeve, conical latch and bolt.In order to the accuracy, the reliability that improve calibration result necessarily require by the connection of school g sensor and calibrating installation necessary solid and reliable, simultaneously in order to increase work efficiency, be necessary to realize by horizontal, longitudinal conversion of school g sensor, to reduce clamping times, increase work efficiency.
Description
Technical field
The utility model relates to the calibration of certain type helicopter rotor system a kind of flight, load test test g sensor, for the fixture that g sensor calibration is installed, belongs to measurement and calibration technical field.
Background technology
G sensor can be used to longitudinal, transverse direction, normal g-load (linear acceleration) when measuring helicopter flight, is widely used in helicopter Project R&D, experimental test.During calibration, g sensor is arranged on the table top of g sensor calibrating installation (precision centrifuge) worktable by general unit clamp (C-type clamp etc.), the installation site of g sensor should be adjusted during installation, its sensitive axes is made to be parallel to table top and vertical and rotating shaft, when precision centrifuge worktable rotates, the electric signal that the centrifugal acceleration that sensor exports and precision centrifuge produces when rotated is proportional, utilize the given certain centrifugal acceleration of precision centrifuge, measure the output valve of now g sensor voltage, utilize least square method, thus obtain input---the output characteristics of g sensor.
The calibration of g sensor is generally adopt unit clamp (C-type clamp etc.) to be arranged on by g sensor on the table top of g sensor calibrating installation (precision centrifuge) worktable, realize the connection by school g sensor and precision centrifuge, rotated by precision centrifuge and obtain by the centrifugal acceleration of school g sensor.The method calibration mainly contains following defect:
1), because clamping is firm not, when transshipping larger, easily produced loosening, even come off by the g sensor in school, therefore measure and must restart, work efficiency is not high, and there is potential safety hazard;
2), can not commutate in calibration process, can only calibrate a direction at every turn, for the g sensor of multiaxis, need multiple clamping in calibration process, work efficiency is not high;
3), calibration time measurement data unstable, repeatability, backhaul poor-performing, thus affect accuracy and the reliability of calibration result.
Summary of the invention
In order to the accuracy, the reliability that improve calibration result necessarily require by the connection of school g sensor and calibrating installation necessary solid and reliable, simultaneously in order to increase work efficiency, be necessary to realize by horizontal, longitudinal conversion of school g sensor, to reduce clamping times, increase work efficiency.
A kind of certain type helicopter rotor system flight is provided, load test test g sensor calibration test fixture, to be fixed on circular clamping table top by trip bolt by school g sensor, make its sensitive axes be parallel to precision centrifuge work top and perpendicular to its rotating shaft, being rigidly connected of circular clamping table top and precision centrifuge is realized by the conical latch of reversing arrangement, realized by the horizontal stroke of school g sensor by circular 90 °, the clamping bench face of conical latch and rotation compressing reversing arrangement, the conversion of longitudinal direction, improve calibration operation efficiency and improve calibration result accuracy, reliability.
A kind of g sensor calibration test fixture, comprising: clamp nut, back-up ring, rolling bearing, T-shaped lining, circular clamping table top, spring, contiguous block, trip bolt, column handle, sleeve, conical latch and bolt.First, the circular clamping table top that rolling bearing is housed is put into the groove of the work top of precision centrifuge, the bearing T shaped lining of the axis of rolling is combined with the work top groove of precision centrifuge, then back-up ring is loaded to the groove of T-shaped lining, screw clamp nut simultaneously, the work top of circular clamping table top and precision centrifuge is rigidly connected in the vertical direction.Secondly, by bolt, the contiguous block of locating reversing device and the work top of precision centrifuge are tightened up at correct position.Finally, by inwardly pulling the column handle of locating reversing device, make conical latch to the U-shaped draw-in groove in quasi-circular clamping bench face, because latch adopts conical design, circular clamping table top can be solved very well in the horizontal direction around the rotational problems of rolling bearing, realize being rigidly connected of the work top of circular clamping table top and precision centrifuge; By outwards pulling the column handle of locating reversing device, conical latch is made to depart from a certain U-shaped draw-in groove of circular clamping table top, by rotating circular clamping bench face to another U-shaped draw-in groove place in 90 ° with last U-shaped draw-in groove, by inwardly pulling the column handle of locating reversing device, make conical latch to the new U-shaped draw-in groove in quasi-circular clamping bench face, can realize thus by the conversion of the horizontal stroke of school g sensor, longitudinal direction, solve multiaxis g sensor, multiple clamping is needed, the key issue that work efficiency is not high in calibration process.
Owing to adopting the version of circular clamping table top and locating reversing device, on the one hand by adopting the rigidly connected mode of screw fastening to make firmly to be fixed on the work top of precision centrifuge by school g sensor pull bar, solve because clamping is firm not, when transshipping larger, loosening problem is easily produced by the g sensor in school, when overcoming calibration, measurement data is unstable, the problem that repeatability, backhaul are poor, has effectively carried high calibration result precision; On the other hand owing to have employed locating reversing device, the conversion of multiaxis g sensor horizontal stroke, longitudinal direction can be realized fast, solve in multiaxis overload sensing calibration process and need the key issue that multiple clamping, work efficiency are not high, effectively improve work efficiency.
Be fixed on circular clamping table top by school g sensor by trip bolt, the work top of circular clamping table top and precision centrifuge is rigidly connected in the vertical direction by clamp nut, efficiently solves the degree of freedom problem of g sensor vertical direction.
Being rigidly connected of circular clamping table top and precision centrifuge is realized by the conical latch of reversing arrangement, because latch adopts conical design, circular clamping table top can be solved very well in the horizontal direction around the rotational problems of rolling bearing, efficiently solve the degree of freedom problem of g sensor horizontal direction.
This utility model effectively overcomes because clamping is firm not, when transshipping larger, easily produced loosening by the g sensor in school, even come off problem, when solving calibration, measurement data is unstable, the problem repeated, backhaul is poor, thus effectively improve the accuracy of calibration result, eliminate potential safety hazard.
Four adjacent U-type groove in 90 ° are devised near the circular clamping table top circumference of this utility model, by drawing, pressing the conical latch of reversing arrangement, rotate circular clamping bench face simultaneously, can easily realize by the conversion of the horizontal stroke of school multiaxis g sensor, longitudinal direction, efficiently solve in multiaxis overload sensing calibration process and need the key issue that multiple clamping, work efficiency are not high, drastically increase work efficiency.
Accompanying drawing explanation
Fig. 1 is the front view of structural representation of the present utility model;
Fig. 2 is the vertical view of structural representation of the present utility model;
Fig. 3 is T-shaped lining sketch;
Fig. 4 is contiguous block sketch;
Fig. 5 is sleeve sketch;
Fig. 6 is conical latch sketch;
Fig. 7 is column handle sketch.
The circular clamping table top of 1--clamp nut 2--back-up ring 3--rolling bearing 4--T type lining 5--
6--spring 7--contiguous block 8--trip bolt 9--column handle 10--sleeve
11--conical latch 12--bolt
Embodiment
A kind of g sensor calibration test fixture, comprise clamp nut 1, back-up ring 2, rolling bearing 3, T-shaped lining 4, circular clamping table top 5, spring 6, contiguous block 7 (cylindrical), trip bolt 8, column handle 9 (cylindrical), sleeve 10 (cylindrical), conical latch 11 (cylindrical) and bolt 12, each parts annexation is: rolling bearing is embedded in T-shaped lining, multidiameter interference fit below T-shaped lining and circular clamping table top, rolling bearing is blocked with circular collar, and with clamp nut, it is fastening; Contiguous block is connected with sleeve screw, conical latch overlaps spring and inserts in contiguous block, and firmly tip cutting pin makes the threaded hole of its other end expose from the open slot of sleeve, the thread end of column handle is screwed in latch, now completes the assembling of fixture.Its working condition is: first, the circular clamping table top 5 that rolling bearing is housed is put into the groove of the work top of precision centrifuge, the bearing T shaped lining 4 of the axis of rolling is correctly contacted with the work top groove of precision centrifuge, then back-up ring is loaded to the groove of T-shaped lining 4, screw clamp nut 1 simultaneously, circular clamping table top 5 is rigidly connected in the vertical direction with the work top of precision centrifuge.Secondly, tightened up at correct position with the work top of precision centrifuge by the contiguous block 7 of bolt 12 by locating reversing device.Finally, by inwardly pulling the handle 9 of locating reversing device, make the U-shaped draw-in groove in conical latch 11 pairs of quasi-circular clamping bench faces 5, because latch 11 adopts conical design, circular clamping table top 5 can be solved very well in the horizontal direction around the rotational problems of rolling bearing 2, realize being rigidly connected of the work top of circular clamping table top 5 and precision centrifuge; By outwards pulling the column handle 9 of locating reversing device, conical latch 11 is made to depart from a certain U-shaped draw-in groove of circular clamping table top 5, by rotating circular clamping bench face 5 to another U-shaped draw-in groove place in 90 ° with last U-shaped draw-in groove, by inwardly pulling the column handle 9 of locating reversing device, make the new U-shaped draw-in groove in conical latch 11 pairs of quasi-circular clamping bench faces 5, can realize thus by the conversion of the horizontal stroke of school g sensor, longitudinal direction, solve multiaxis g sensor, multiple clamping is needed, the key issue that work efficiency is not high in calibration process.When precision centrifuge worktable rotates, owing to being rigidly connected, be fixed on being rotated with the revolving shaft of identical rotating speed around precision centrifuge by school g sensor on circular clamping table top 5, the electric signal that the centrifugal acceleration that sensor exports and precision centrifuge produces when rotated is proportional, utilize the given certain centrifugal acceleration of precision centrifuge, measure now by the output valve of school g sensor voltage, utilize least square method, thus obtain input---the output characteristics of g sensor.
Claims (1)
1. a g sensor calibration test fixture, comprise: clamp nut (1), back-up ring (2), rolling bearing (3), T-shaped lining (4), circular clamping table top (5), spring (6), contiguous block (7), trip bolt (8), column handle (9), sleeve (10), conical latch (11) and bolt (12), is characterized in that:
Rolling bearing (3) is embedded in T-shaped lining (4), the multidiameter interference fit of T-shaped lining (4) and circular clamping table top (5) below, rolling bearing (3) is blocked with the back-up ring (2) of circle, and with clamp nut (1), it is fastening; Contiguous block (7) is connected with sleeve (10) trip bolt (8), conical latch (11) puts spring (6) and inserts in contiguous block (7), the threaded hole of the other end of conical latch (11) exposes from the open slot of sleeve (10), and the thread end of column handle (9) is screwed in conical latch (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420752613.6U CN204359818U (en) | 2014-12-03 | 2014-12-03 | A kind of g sensor calibration test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420752613.6U CN204359818U (en) | 2014-12-03 | 2014-12-03 | A kind of g sensor calibration test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204359818U true CN204359818U (en) | 2015-05-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420752613.6U Active CN204359818U (en) | 2014-12-03 | 2014-12-03 | A kind of g sensor calibration test fixture |
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| Country | Link |
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| CN (1) | CN204359818U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461445A (en) * | 2020-11-20 | 2021-03-09 | 中国直升机设计研究所 | Helicopter blade surface miniature pressure sensor calibrating device |
-
2014
- 2014-12-03 CN CN201420752613.6U patent/CN204359818U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461445A (en) * | 2020-11-20 | 2021-03-09 | 中国直升机设计研究所 | Helicopter blade surface miniature pressure sensor calibrating device |
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