CN209946197U - Accelerometer gravity field test tool - Google Patents
Accelerometer gravity field test tool Download PDFInfo
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- CN209946197U CN209946197U CN201920843151.1U CN201920843151U CN209946197U CN 209946197 U CN209946197 U CN 209946197U CN 201920843151 U CN201920843151 U CN 201920843151U CN 209946197 U CN209946197 U CN 209946197U
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Abstract
The utility model provides an accelerometer gravity field test fixture, has accelerometer, cable, base, installs the detachable mounting disc on the base. The base is provided with a circular bottom plate and a cylindrical boss extending upwards from the central area of the upper end face of the bottom plate, and a plurality of transversely arranged gaskets are uniformly distributed on the edge of the lower end face of the bottom plate along the circumferential direction; the mounting disc is provided with a circular panel, and a cylindrical boss body extending upwards is arranged in the central area of the upper end face of the panel; the shell head of the accelerometer is fixedly connected with the upper end face of the boss body through a plurality of first screws, and the shell body of the accelerometer is inserted into the first central hole and is in clearance fit with the first central hole. The utility model discloses reliable operation, installation, convenient operation, the practicality, the measuring accuracy is high.
Description
Technical Field
The utility model relates to an accelerometer gravity field test fixture.
Background
The accelerometer gravity field test tool is used for a triaxial rate position rotary table, an accelerometer is installed, and the triaxial rate position rotary table provides +/-1 g gravity field for testing the accelerometer, so that the accelerometer is detected by auxiliary testing equipment. The tool in the prior art is complex in structure, not easy to operate and general in test precision.
The inventors searched the following related patent documents: CN202216970U discloses frock is used in online calibration of accelerometer debugging equipment, including transition dish, measurement standard ware, adjustment ball and adjusting screw and fastening screw, the transition dish is circular structure, and the periphery evenly sets up a plurality of screw thread via holes that are used for the fastening screw installation of taking the recess, and the center is for being used for placing the ball socket of adjustment ball, is a plurality of evenly distributed's the screw hole that is used for the adjustment screw installation around the ball socket, the transition dish passes through fastening screw and links to each other with accurate graduation equipment, and before fastening screw locking, has the hole between screw thread via hole and the fastening screw, measurement standard ware passes through adjusting screw and links to each other with the transition dish, and its lower surface contacts with the adjustment ball that sets up at the ball socket simultaneously. CN103466106A discloses a frock and an adjustment method for adjusting the installation accuracy of flexible pendulum type accelerometer, accurately make up three independent adjusting shim into a whole, grind the even volume of going simultaneously, both reached the installation accuracy requirement of accelerometer, guaranteed that the plane that three adjusting shim after the processing constitutes can strict coplane again, make the base can well laminate with the installation face after the accelerometer installation, effectively prevented the accelerometer bias value item unstable factor that the base warp and lead to.
Above these techniques are right the utility model discloses how to provide a reliable operation, installation, convenient operation, the experimental test fixture of accelerometer gravity field that the measuring accuracy is high, do not give concrete guide scheme.
Disclosure of Invention
The utility model aims to solve the technical problem that a test fixture for accelerometer gravitational field test is provided, its reliable operation, installation, convenient operation, practicality, the measuring accuracy is high.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a test fixture (rotary table fixture) for the gravitational field test of accelerometer is composed of accelerometer, cable electrically connected to accelerometer, and base with detachable installing disk, circular bottom plate (plate), and cylindrical boss extended upward from the central region of top surface of bottom plate, multiple screw connecting holes (multiple screw connecting holes) longitudinally arranged at the edge of bottom plate along circumference direction, multiple transverse spacers distributed uniformly at the edge of bottom surface of bottom plate along circumference direction, multiple screw connecting holes and multiple spacers corresponding to each other and located at one screw connecting hole, the side of the base plate has a number of notches through which the cables pass. The mounting disc have circular shape panel (dull and stereotyped) the up end central area (center department) of panel has the cylindrical boss body that upwards stretches out, the panel with the boss body has the first centre bore that link up mutually that is vertical setting, the lower terminal surface of panel have with the base boss matched with round hole (or cylindrical sunken to say so), the mounting disc the panel is located the base above the bottom plate, the panel with the bottom plate passes through a plurality of screw connection together, and a plurality of screws are in the edge of panel is along circumferencial direction evenly distributed, the base the boss insert (pack in) the mounting disc the downthehole and between clearance fit. The head of the shell of the accelerometer is fixedly connected with the upper end face of the boss body through a plurality of first screws (three first screws), and the shell of the accelerometer is inserted into the first central hole to be in clearance fit with the first central hole.
Among the above-mentioned technical scheme, the utility model discloses an optimal scheme can be: the number of the screw connecting holes can be eight, and correspondingly, the number of the gaskets is eight. The number of the notches is one or two, and may be a plurality of notches. The number of the screws can be six, each screw can be an inner hexagonal socket head cap screw, and six screw mounting holes for mounting the screws are uniformly distributed on the edge of the panel along the circumferential direction.
The utility model discloses have accelerometer, cable, base, the base on install the detachable mounting disc, like this, the utility model discloses an accelerometer gravity field test fixture is used for TBL-3302-AT to take temperature control box triaxial speed position revolving stage, installs SNJ-35 type accelerometer, provides the + -1 g gravity field of accelerometer test by triaxial speed position revolving stage to supplementary test equipment carries out the special frock that detects to the accelerometer. Its reliable operation, installation, convenient operation, practicality, the measuring accuracy is high, compares with existing correlation technique, the utility model discloses a work efficiency has improved more than 20%.
Drawings
Fig. 1 is a schematic structural view (perspective view) of the present invention.
Fig. 2 is a schematic structural view (perspective view) of the base of the present invention.
Fig. 3 is a rear view of the base of the present invention.
Fig. 4 is a schematic structural view (longitudinal sectional view) of the mounting plate according to the present invention.
Fig. 5 is a cross-sectional view taken along line a-a of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art without any creative work based on the present embodiment belong to the protection scope of the present invention.
Example 1: as shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the accelerometer gravitational field test fixture of the present invention has an accelerometer 7, a cable 6 electrically connected to the accelerometer 7, and a base 1, wherein the base 1 is provided with a detachable mounting plate 2. The base 1 has a circular bottom plate (flat plate) 101, and a cylindrical boss 103 protruding upward in the central region (center) of the upper end face of the bottom plate. The edge of the bottom plate 101 is uniformly distributed with a plurality of screw connection holes (a plurality of bolt connection holes) 102 which are longitudinally arranged and used for connecting the bottom plate with the installation surface of the rotary table, the bottom plate 101 and the boss 103 are provided with longitudinally arranged through center holes 104, the edge of the lower end surface of the bottom plate 101 is uniformly distributed with a plurality of gaskets 105 which are transversely arranged along the circumferential direction, the screw connection holes 102 are in one-to-one correspondence with the gaskets 105, each gasket 105 is positioned at one screw connection hole 102 corresponding to the gasket, and the side surface of the bottom plate 101 is provided with a plurality of notches 3 through which the cables 6 pass. The mounting plate 2 has a circular panel (flat plate) 201, a cylindrical boss 202 extending upward from the central area (center) of the upper end surface of the panel, the panel 201 and the boss 202 have a longitudinally-arranged first central hole 203, and the lower end surface of the panel 201 has a circular hole (or cylindrical recess) 204 matching with the boss 103 of the base. The panel 201 of the mounting disc 2 is located on the bottom plate 101 of the base 1, the panel 201 is connected with the bottom plate 101 through a plurality of screws 4, the plurality of screws 4 are uniformly distributed on the edge of the panel 201 along the circumferential direction, and the boss 103 of the base is inserted (installed) into the round hole 204 of the mounting disc 2 to be in clearance fit with the round hole. The head of the housing of the accelerometer 7 is fixedly connected with the upper end face of the boss body 202 through a plurality of first screws (three first screws) 5, and the housing of the accelerometer 7 is inserted into the first central hole 203 to be in clearance fit with the first central hole.
As shown in fig. 1, 2, 3, 4, and 5, the number of the screw connection holes 102 is eight, and accordingly, the number of the spacers 105 is eight. The number of the above-mentioned notches 3 is one or two, and may be plural. The number of the screws 4 is six, each screw 4 is a socket head cap screw, and six screw mounting holes 205 for mounting the screws 4 are uniformly distributed along the circumferential direction on the edge of the panel 201.
The utility model discloses an experimental test fixture of accelerometer gravity field is used for TBL-3302-AT to take temperature control box triaxial speed position revolving stage, installs SNJ-35 type accelerometer, provides the 1g gravity field of accelerometer test by triaxial speed position revolving stage to supplementary test equipment carries out the special frock that detects to the accelerometer. Basic parameters (1) size: tool overall dimensions (diameter × height): Φ 180 × 40mm, patch cable length: 15 cm. (2) Weight: 1.7 kg. Critical dimension: in order to ensure the test precision of the accelerometer, the processing precision of a tool is improved properly, the parallelism requirement is determined as a key dimension, the design requirement refers to a GB/T1184 parallelism tolerance value and meets the tolerance level of more than 5, and the parallelism of the mounting disc and the base mounting surface is less than 0.02 mm.
The utility model discloses a use method: 1) and taking out the tool from the packaging box, and counting all parts and accessories on a packaging list. 2) The fixture is placed on a stable and clean desktop near the three-axis rotary table, the fixture mounting surface is protected by attention, and damages such as collision, scratch and the like are prevented. 3) The mounting disc is fixed on the base, and then the whole mounting is carried out on the mounting surface of the rotary table, if the rotation test of the accelerometer (testing the output stability under the rotating rotary table of the accelerometer) needs to be tested, before the screw is fastened, a dial indicator and a gauge stand are used, the position of the tool is adjusted while the coaxiality of the excircle of the mounting disc and the rotating shaft of the rotary table is measured, so that the coaxiality of the mounting disc and the rotating shaft of the rotary table is within 0.02mm, and then the screw. 4) And connecting the three-axis turntable tool switching cable to a user socket to confirm the connection. 5) After the installation is finished, the accelerometer can be tested according to the test program of the accelerometer.
The utility model discloses reliable operation, installation, convenient operation, the practicality, the measuring accuracy is high, compares with existing correlation technique, the utility model discloses a (test) work efficiency has improved more than 20%.
Claims (4)
1. The utility model provides an accelerometer gravity field test fixture, has accelerometer (7), cable (6) with the accelerometer electricity is connected, base (1), its characterized in that base (1) on install detachable mounting disc (2), base (1) have circular shape bottom plate (101), in the cylindrical boss (103) of upwards stretching out of the up end central zone of bottom plate, the edge of bottom plate (101) along circumferencial direction evenly distributed have be used for connecting this bottom plate and revolving stage installation face be vertical a plurality of screw connecting hole (102) that set up, bottom plate (101) and boss (103) have be vertical a set up well-versed in centre bore (104), the edge of the lower terminal surface of bottom plate (101) along circumferencial direction evenly distributed have be horizontal a plurality of gaskets (105) that set up, a plurality of screw connecting hole (102) and a plurality of gaskets (105) one-to-one correspondence, each gasket (105) is positioned at one corresponding screw connecting hole (102), and a plurality of notches (3) through which the cables (6) pass are arranged on the side surface of the bottom plate (101);
the mounting disc (2) is provided with a circular panel (201), a cylindrical boss body (202) which extends upwards is arranged in the central area of the upper end face of the panel, the panel (201) and the boss body (202) are provided with a first longitudinally-arranged through central hole (203), the lower end face of the panel (201) is provided with a round hole (204) which is matched with the boss (103) of the base, the panel (201) of the mounting disc (2) is positioned on the bottom plate (101) of the base (1), the panel (201) and the bottom plate (101) are connected together through a plurality of screws (4), the plurality of screws (4) are uniformly distributed on the edge of the panel (201) along the circumferential direction, and the boss (103) of the base is inserted into the round hole (204) of the mounting disc (2) to be in clearance fit with each other;
the head of the shell of the accelerometer (7) is fixedly connected with the upper end face of the boss body (202) through a plurality of first screws (5), and the shell of the accelerometer (7) is inserted into the first center hole (203) to be in clearance fit with the first center hole.
2. The accelerometer gravitational field test fixture of claim 1, wherein the number of screw attachment holes (102) is eight, and correspondingly, the number of spacers (105) is eight.
3. The accelerometer gravitational field test fixture of claim 1, wherein the number of said notches (3) is one or two.
4. The accelerometer gravitational field test tool of claim 1, wherein the number of the screws (4) is six, and each screw (4) is a socket head cap screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920843151.1U CN209946197U (en) | 2019-06-05 | 2019-06-05 | Accelerometer gravity field test tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920843151.1U CN209946197U (en) | 2019-06-05 | 2019-06-05 | Accelerometer gravity field test tool |
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| CN209946197U true CN209946197U (en) | 2020-01-14 |
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| CN201920843151.1U Active CN209946197U (en) | 2019-06-05 | 2019-06-05 | Accelerometer gravity field test tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067845A (en) * | 2020-09-04 | 2020-12-11 | 中国船舶重工集团公司第七0七研究所 | Quartz pendulum accelerometer long-term stability testing tool and testing method |
-
2019
- 2019-06-05 CN CN201920843151.1U patent/CN209946197U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067845A (en) * | 2020-09-04 | 2020-12-11 | 中国船舶重工集团公司第七0七研究所 | Quartz pendulum accelerometer long-term stability testing tool and testing method |
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