CN103472261B - Eight-position testing device of flexible pendulous accelerometer - Google Patents
Eight-position testing device of flexible pendulous accelerometer Download PDFInfo
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- CN103472261B CN103472261B CN201310383148.3A CN201310383148A CN103472261B CN 103472261 B CN103472261 B CN 103472261B CN 201310383148 A CN201310383148 A CN 201310383148A CN 103472261 B CN103472261 B CN 103472261B
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Abstract
The invention relates to an eight-position testing device of a flexible pendulous accelerometer, belonging to the technical field of precision measurement of accelerometers. According to the eight-position testing device, the complex electromechanical turntable equipment can be completely replaced through accurate installation and location and hexahedral structural design; tumble test of the flexible pendulous accelerometer in eight positions such as door sate and swing state is carried out in a gravitational field repetitively and accurately; the precision and the stability of the flexible pendulous accelerometer are ensured.
Description
Technical field
The present invention relates to flexible pendulous accelerometer 8 positions proving installation, belong to accelerometer Precision Survey Technology field.
Background technology
Flexible pendulous accelerometer is the inertia type instrument being widely used in "Long March" series of carrier rockets, can acceleration that is responsive, that measure carrier rocket flight be accurately that it carries out the basis of inertial navigation and inertial guidance.Precision and stability is the accurate sensitivity of flexible pendulous accelerometer, measures the key of rocket flight acceleration.
In order to ensure the precision and stability of flexible pendulous accelerometer, repeatability precision≤1 rad when requiring accelerometer to carry out a state, pendulum state 8 positions rollover test in gravity field between each position, accelerometer carries out door, the inclined value of pendulum state 8 positions rollover test and the moon stability of constant multiplier and all requires≤6E-05 in gravity field.Classic method uses two-axle rotating table in gravity field, to carry out a state, pendulum state 8 positions rollover test to flexible pendulous accelerometer, and the machinery, the electrical null position that all need first to adjust turntable and accelerometer during each test are consistent, cause testing procedure complexity; In addition, circuit signal between accelerometer and testing apparatus need be transferred by turntable conducting slip ring, therefore the maximum error item in test is introduced---turntable high power device electromagnetic interference signal, this interference is partially worth the flexible pendulous accelerometer of small-signal and constant multiplier precision all makes a big impact.Use two-axle rotating table to carry out 8 positions rollover test to flexible pendulous accelerometer, not only production cost is high, and method of operating is complicated, and test error is large, causes the accelerometer production cycle to lengthen, qualification rate is low.
At present, "Long March" series of carrier rockets are in high density launch mission period, high requirement is proposed to the quantity of flexible pendulous accelerometer and precision, therefore, retrofit testing method, effectively realizes the key that flexible pendulous accelerometer repeatedly, accurately carries out door in gravity field, pendulum state 8 positions rollover test becomes accelerometer production.
Summary of the invention
The object of the invention is to propose flexible pendulous accelerometer 8 positions proving installation.
The object of the invention is to be achieved through the following technical solutions.
Flexible pendulous accelerometer 8 positions proving installation of the present invention, this device comprises hexahedron pedestal, heat-insulation layer, four cylinders, two tommys, ceramic ring and three attachment screws;
Have five faces as reference field in six faces of described hexahedron pedestal, the surface of reference field is milled with groove respectively, forms 20 boss locating surfaces; Another one face is non-referenced face, there is the mounting hole of accelerometer at its center, heat-insulation layer is had in mounting hole, there is ceramic ring on the top of mounting hole, ceramic ring is connected and fixed by three attachment screws and hexahedron pedestal, ceramic ring has two dowel holes, two tommys stick with glue knot in dowel hole, and tommy is used for accelerometer zero set; Ceramic ring has three through holes, through hole extends in hexahedron pedestal, and through hole extends to part in hexahedron pedestal with internal thread, for installing fastening accelerometer; Non-referenced face also has the mounting hole of four cylinders, four cylinders are adhesive in mounting hole; The plane of four cylinder compositions is for providing the 6th reference field of hexahedron pedestal; The upper reference field of ceramic ring is consistent with the precision of the 6th of hexahedron pedestal the reference field.
The mutual parallel or vertical precision of 20 described boss locating surfaces is not more than 2 μm;
The 6th reference field that four described cylinders are formed is not more than 2 μm with the parallel of boss locating surface or vertical precision;
The locating surface of two described tommy compositions is not more than 2 μm with the parallel of six reference fields or vertical precision;
The upper reference field of described ceramic ring is not more than 2 μm with the parallel of six reference fields or vertical precision;
The vertical precision of the locating surface that the upper reference field of described ceramic ring and two tommys form is not more than 2 μm.
Beneficial effect
The present invention is by accurately installation location and hexahedron structure design can replace complicated dynamo-electric turret plant to use completely, effectively realize flexible pendulous accelerometer in gravity field, repeatedly, accurately carry out door, pendulum state 8 positions rollover test, ensure the precision and stability of flexible pendulous accelerometer;
When using device to test of the present invention, once instrument accurately can be limited to the zero-bit of test, hexahedral apparatus six high-precision reference fields can realize the accurate location of flexible pendulous accelerometer in eight positions such as door state, pendulum states, appliance circuit signal directly passes into testing apparatus, method of operating is simple, measuring accuracy is high, accurately can reflect the precision and stability of flexible pendulous accelerometer.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention;
Fig. 2 is the vertical view of device of the present invention;
Fig. 3 is the structural representation of hexahedron pedestal;
Fig. 4 is the structural representation of ceramic ring;
Fig. 5 is the cut-open view of ceramic ring.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
Flexible pendulous accelerometer 8 positions proving installation, this device comprises hexahedron pedestal 1, heat-insulation layer 2, four cylinders 3, two tommys 4, ceramic ring 5 and three attachment screws 6;
Have five faces as reference field in six faces of described hexahedron pedestal 1, the surface of reference field is milled with groove respectively, forms 20 boss locating surfaces 9; Another one face is non-referenced face, there is the mounting hole 7 of accelerometer at its center, heat-insulation layer 2 is had in mounting hole 7, there is ceramic ring 5 on the top of mounting hole 7, ceramic ring 5 is connected and fixed by three attachment screws 6 and hexahedron pedestal 1, ceramic ring 5 has two dowel holes, for installing two tommys 4, tommy 4 is for accelerometer zero set; Ceramic ring 5 has three through holes 8, through hole 8 extends in hexahedron pedestal 1, and through hole 8 extends to part in hexahedron pedestal 1 with internal thread, for installing fastening accelerometer; Non-referenced face also has the mounting hole of four cylinders 3, the plane of four cylinder 3 compositions is for providing the 6th reference field of hexahedron pedestal 1; The upper reference field of ceramic ring 5 is consistent with the precision of the 6th of hexahedron pedestal 1 the reference field.
The method of testing utilizing above-mentioned device to carry out flexible pendulous accelerometer 8 positions is:
1) degree of will speed up meter is arranged in ceramic ring 5, and accelerometer is embedded in the mounting hole 7 of accelerometer, and the installed surface of accelerometer is tightly attached on the upper reference field of ceramic ring 5, and the locating surface of accelerometer tightly leans against on two tommys 4 simultaneously; Be axially fixed on hexahedron pedestal 1 with screw by through hole 8 degree of will speed up meter;
2) device that accelerometer is housed is placed on zero level flat board with the orientation of accelerometer suitable pendulum state, zero acceleration, make one of them side reference field of this device be adjacent to reference field on zero level flat board, the cable of degree of will speed up meter is connected with the cable of testing apparatus simultaneously;
3) to testing apparatus energising, be energized to accelerometer by cable; When the temperature of accelerometer reaches working temperature, the output data of first pendulum state position of testing acceleration meter;
4) this device is carried out 90 ° of upsets in pendulum state, read the output data of second pendulum state position of accelerometer, carry out 90 ° of upsets more in the same way, read the output data of the 3rd pendulum state position of accelerometer, carry out 90 ° of upsets more in the same way, read the output data of the 4th pendulum state position of accelerometer;
5) this device is turn to accelerometer door state, the orientation of zero acceleration is placed, make one of them side reference field of this device be adjacent to reference field on zero level flat board simultaneously, first door state position of reading accelerometer exports data, carry out 90 ° of upsets more in the same way, read the output data of second door state position of accelerometer, carry out 90 ° of upsets more in the same way, read the output data of the 3rd door state position of accelerometer, carry out 90 ° of upsets more in the same way, read the output data of the 4th door state position of accelerometer, thus complete accelerometer pendulum state and the test of door state 8 positions separation coefficient.
When using this device to test flexible pendulous accelerometer, can fast, accurately degree of will speed up meter be limited to the zero-bit of test, not only method of operating is simple, and the electromagnetic interference (EMI) introduced when can effectively avoid dynamo-electric turntable to test, measuring accuracy is high, accurately can reflect the precision and stability of flexible pendulous accelerometer.
Claims (7)
1. flexible pendulous accelerometer 8 positions proving installation, is characterized in that: this device comprises hexahedron pedestal (1), heat-insulation layer (2), four cylinders (3), two tommys (4), ceramic ring (5) and three attachment screws (6);
Have five faces as reference field in six faces of described hexahedron pedestal (1), the surface of reference field is milled with groove respectively, forms boss locating surface (9); Another one face is non-referenced face, there is the mounting hole (7) of accelerometer at its center, heat-insulation layer (2) is had in mounting hole (7), there is ceramic ring (5) on the top of mounting hole (7), ceramic ring (5) is connected and fixed by three attachment screws (6) and hexahedron pedestal (1), ceramic ring (5) there are two dowel holes, two tommys (4) stick with glue knot in dowel hole, and tommy (4) is for accelerometer zero set; Ceramic ring (5) there are three through holes (8), through hole (8) extends in hexahedron pedestal (1), through hole (8) extends to part in hexahedron pedestal (1) with internal thread, for installing fastening accelerometer; Non-referenced face also has the mounting hole of four cylinders (3), four cylinders are adhesive in mounting hole; The plane that four cylinders (3) form is used for providing the 6th reference field of hexahedron pedestal (1); The upper reference field of ceramic ring (5) is consistent with the precision of the 6th reference field of hexahedron pedestal (1).
2. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: described locating surface (9) be parallel to each other or vertical precision is not more than 2 μm.
3. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: the 6th reference field that four described cylinders (3) are formed is not more than 2 μm with the parallel or vertical precision of boss locating surface (9).
4. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: the locating surface that two described tommys (4) form is not more than 2 μm with the parallel of six reference fields or vertical precision.
5. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: the upper reference field of described ceramic ring (5) is not more than 2 μm with the parallel of six reference fields or vertical precision.
6. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: the vertical precision of the locating surface that the upper reference field of described ceramic ring (5) and two tommys (4) form is not more than 2 μm.
7. flexible pendulous accelerometer 8 positions proving installation according to claim 1, is characterized in that: boss locating surface (9) is 20.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104567934B (en) * | 2015-01-22 | 2017-05-24 | 中航捷锐（北京）光电技术有限公司 | Jig for vibration test of fiber-optic gyroscope and testing method |
| CN106556716B (en) * | 2015-09-30 | 2019-06-25 | 航天科工惯性技术有限公司 | A kind of accelerometer torquer stabilization treatment method |
| CN106645798B (en) * | 2015-11-02 | 2019-12-13 | 航天科工惯性技术有限公司 | Method for detecting stability of scale factor of accelerometer |
| CN106841678A (en) * | 2015-12-04 | 2017-06-13 | 航天科工惯性技术有限公司 | Accelerometer watch core stabilization treatment method |
| CN108169517A (en) * | 2016-12-07 | 2018-06-15 | 方正国际软件(北京)有限公司 | The error calibrating method and device of a kind of accelerometer |
| CN107421563A (en) * | 2017-06-02 | 2017-12-01 | 东南大学 | A kind of self-checking device and calibration method for multiple inertia measurement equipment |
| CN111650391A (en) * | 2020-06-29 | 2020-09-11 | 中国航空工业集团公司北京航空精密机械研究所 | Accelerometer mounting clamp and machining method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4873867A (en) * | 1988-02-12 | 1989-10-17 | Trc, Inc. | Redundant signal device for auto crash testing |
| US5801348A (en) * | 1996-01-31 | 1998-09-01 | Mitsubishi Denki Kabushiki Kaisha | Acceleration detector |
| CN101852817A (en) * | 2010-05-06 | 2010-10-06 | 哈尔滨工业大学 | Calibration Method of Orthogonal Dual High Accuracy Accelerometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI525411B (en) * | 2010-04-21 | 2016-03-11 | 三角設計公司 | System and method for accelerating a device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873867A (en) * | 1988-02-12 | 1989-10-17 | Trc, Inc. | Redundant signal device for auto crash testing |
| US5801348A (en) * | 1996-01-31 | 1998-09-01 | Mitsubishi Denki Kabushiki Kaisha | Acceleration detector |
| CN101852817A (en) * | 2010-05-06 | 2010-10-06 | 哈尔滨工业大学 | Calibration Method of Orthogonal Dual High Accuracy Accelerometer |
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Effective date of registration: 20161008 Address after: 100094, No. 3, North Road, Yongfeng industrial base, Beijing, Haidian District Patentee after: China Aerospace Times Electronics Co., Ltd. Address before: 100854 Yongding Road, Beijing, No. 50, No. Patentee before: Beijing Xinghua Machinery Factory |
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Effective date of registration: 20190321 Address after: Room 205, 2nd floor, 6th building, 8th courtyard, Haixin Road, Daxing District, Beijing 102600 Patentee after: Beijing Aerospace Xinghua Technology Co., Ltd. Address before: No. 3 Yongjie North Road, Yongfeng Industrial Base, Haidian District, Beijing 100094 Patentee before: China Aerospace Times Electronics Co., Ltd. |