CN110174529B - Accelerometer centrifugation test fixture - Google Patents
Accelerometer centrifugation test fixture Download PDFInfo
- Publication number
- CN110174529B CN110174529B CN201910486367.1A CN201910486367A CN110174529B CN 110174529 B CN110174529 B CN 110174529B CN 201910486367 A CN201910486367 A CN 201910486367A CN 110174529 B CN110174529 B CN 110174529B
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- accelerometer
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000005119 centrifugation Methods 0.000 title description 3
- 238000009434 installation Methods 0.000 claims abstract description 24
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 230000007704 transition Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The centrifugal test tool for the accelerometer is provided with two accelerometers, cables and bases, wherein each base is provided with a detachable mounting disc, so that the number of the mounting discs is two, the accelerometers and the balancing weights are respectively arranged on the two mounting discs, and each base is provided with a bottom plate and a cylindrical boss which extends upwards in the central area of the upper end face of the bottom plate; the mounting plate is provided with a circular panel; the structure of each base is that the panel is arranged in the first concave and in clearance fit, the panel is fixedly connected with the bottom surface of the first concave through a plurality of first screws, and the plurality of first screws are uniformly distributed along the circumferential direction at the edge of the panel; one mounting plate is provided with an accelerometer, the positive value and the negative value of the accelerometer are measured, and the other mounting plate is provided with a balancing weight. The invention has reliable operation, convenient installation and operation, practicality and high test precision.
Description
Technical Field
The invention relates to an accelerometer centrifugal test tool.
Background
The TBL-SC0101-A miniature centrifugal machine with the temperature control box is used for providing a required acceleration environment for accelerometer test calibration, the centrifugal machine is a beam type centrifugal machine, a beam rotates around a rotating shaft at a central position to generate centrifugal force, and tested products are installed on two end faces of the beam. In order to realize the test of the accelerometer, a special tool is required to be designed for fixing the accelerometer, and in order to ensure the test precision, if only one test end face is utilized during the test, the balancing weight is required to be installed on the other section of the cross beam, so that the tool according to the accelerometer is designed and the balancing weight is designed during the tool design. The prior art tool has complex structure and is not easy to operate.
The inventors have retrieved the following related patent documents: CN202216970U discloses an online calibration tool for accelerometer debugging equipment, including transition dish, measurement standard ware, adjusting ball and adjusting screw and fastening screw, the transition dish is circular structure, and the periphery evenly sets up the screw thread via hole that a plurality of tape groove was used for the fastening screw installation, and the center is the ball socket that is used for placing the adjusting ball, and the screw hole that is used for the adjusting screw installation of a plurality of evenly distributed for surrounding the ball socket, the transition dish passes through fastening screw and links to each other with accurate indexing equipment, and before the fastening screw locking, there is the hole between screw thread via hole and the fastening screw, the measurement standard ware passes through adjusting screw and links to each other with the transition dish, and its lower surface contacts with the adjusting ball that sets up at the ball socket simultaneously. CN103466106a discloses a tool and an adjusting method for adjusting the installation precision of a flexible pendulum accelerometer, which accurately combines three independent adjusting gaskets into a whole, and simultaneously grinds the three independent adjusting gaskets uniformly, thereby not only meeting the requirement of the installation precision of the accelerometer, but also ensuring that the plane formed by the three processed adjusting gaskets can be strictly coplanar, so that the base and the installation surface of the accelerometer can be well attached after the installation, and effectively preventing the unstable factors of the accelerometer deflection items caused by the deformation of the base.
The technology provides an accelerometer centrifugal test tool which is reliable in operation, convenient to install and operate and high in test precision, and a specific guiding scheme is not given.
Disclosure of Invention
The invention aims to solve the technical problem of providing an accelerometer centrifugal test tool which is reliable in work, convenient to install and operate, practical and high in test precision.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an accelerometer centrifugation test fixture, has accelerometer, the cable of being connected with accelerometer electricity, base, its technical scheme lies in the quantity of base be two, all install a detachable mounting disc and make the quantity of mounting disc be two on every base, two install accelerometer and balancing weight respectively on the mounting disc, every base has approximately octagon bottom plate (flat board), the up end central zone (center department) of bottom plate upwards stretches out cylindrical boss. In each base, a plurality of longitudinally arranged screw connection holes for connecting the base plate with a mounting surface on the rotating outer side of the centrifugal machine are uniformly distributed on the edge of the base plate, a cylindrical first recess matched with one mounting plate corresponding to the base plate is formed in the central area (the center) of the upper end surface of the boss, a cylindrical second recess is formed in the central area (the center) of the lower end surface of the base plate, a longitudinally arranged first central hole communicated with the second recess is formed in the bottom surface of the first recess, a plurality of transversely arranged gaskets are uniformly distributed on the edge of the lower end surface of the base plate, the plurality of screw connection holes are in one-to-one correspondence with the plurality of gaskets, each gasket is positioned at one screw connection hole corresponding to the screw connection hole, a plurality of first notches for the cable to pass through are formed in the side wall of the boss, a plurality of second notches for the cable to pass through are formed in the side surface of the base plate, and the plurality of first notches are in one-to-one correspondence with the plurality of second notches; in each mounting plate, the mounting plate has a circular panel (flat plate) with a central region (at the center) having a second central aperture disposed longitudinally; the structure of each base is that the panel is arranged in the first concave and in clearance fit, the panel is fixedly connected with the bottom surface of the first concave through a plurality of first screws, and the plurality of first screws are uniformly distributed along the circumferential direction at the edge of the panel; the structure of installing the accelerometer on one installation disc is that when measuring the negative value of the accelerometer, the shell head of the accelerometer is fixedly connected with the upper end surface of the installation disc through a plurality of second screws (three second screws can be adopted), and the shell body of the accelerometer is in clearance fit with the second center hole and stretches into the first center hole; when the positive value of the accelerometer is measured, the shell head of the accelerometer is fixedly connected with the lower end surface of the mounting plate through a plurality of second screws (three second screws can be adopted), and the shell body of the accelerometer is in clearance fit with the second center hole and extends upwards from the mounting plate; the structure of installing the balancing weight on another mounting plate is that the head of the balancing weight and the upper end face of the mounting plate are fixedly connected through a plurality of third screws (three third screws can be adopted), and the shell body of the balancing weight is in clearance fit with the second center hole and stretches into the first center hole.
In the above technical solution, the preferred solution of the present invention may be: in each base, the number of the screw connection holes can be eight, and correspondingly, the number of the gaskets is eight. In each of the bases, the dimensions (diameter and thickness) of the first recess are preferably the same as those of the second recess. In each base, the number of the first notch and the second notch is one or two or more. In the structure that each base is provided with one mounting disc, the number of the first screws is four.
The invention has the accelerometer, the cable and the base, the number of the base is two, each base is provided with a detachable mounting disc, so that the number of the mounting discs is two, the accelerometer and the balancing weight are respectively arranged on the two mounting discs, and each base is provided with a bottom plate and a cylindrical boss which extends upwards in the central area of the upper end face of the bottom plate; the mounting plate is provided with a circular panel; the structure of each base is that the panel is arranged in the first concave and in clearance fit, the panel is fixedly connected with the bottom surface of the first concave through a plurality of first screws, and the plurality of first screws are uniformly distributed along the circumferential direction at the edge of the panel; one mounting plate is provided with an accelerometer, the positive value and the negative value of the accelerometer are measured, and the other mounting plate is provided with a balancing weight. In this way, the two bases are respectively installed on the two installation surfaces at the outer side of the rotation of the centrifugal machine, the installation discs are respectively installed at the corresponding positions of the bases, and the accelerometer and the balancing weight are respectively installed on the two installation discs at the two ends of the centrifugal machine (at the moment, the installation modes for testing the negative value and the positive value of the accelerometer are shown in fig. 5 and 6). Through experiments, the invention has the advantages of reliable operation, convenient installation and operation, practicality and high test precision. Compared with the prior related art, the work efficiency of the invention is improved by more than 25 percent.
Drawings
Fig. 1 is a schematic structural view (perspective view) of the present invention, and fig. 1 (a) and (b) are schematic structural views of an accelerometer mounted on one mounting plate and a balancing weight mounted on the other mounting plate, respectively.
Fig. 2 is a schematic structural view (perspective view) of a base in the present invention.
Fig. 3 is a rear view of a base in accordance with the present invention.
Fig. 4 is a schematic view (longitudinal sectional view) of a mounting plate according to the present invention.
Fig. 5 is a cross-sectional view taken along line A-A in fig. 1 (schematic structural diagram when measuring the negative value of the accelerometer, and accelerometer mounting mode diagram).
Fig. 6 is a schematic view of the structure of the present invention (accelerometer mounting pattern) when measuring the positive value of the accelerometer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to examples. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, based on this embodiment, which a person of ordinary skill in the art would obtain without undue burden, are within the scope of the invention.
Example 1: as shown in fig. 1, 2, 3, 4, 5 and 6, the centrifugal test fixture for the accelerometer provided by the invention is provided with an accelerometer 7, a cable 6 electrically connected with the accelerometer and a base 1. The number of the bases 1 is two, each base 1 is provided with a detachable mounting plate 2, so that the number of the mounting plates 2 is two, the two mounting plates 2 are respectively provided with an accelerometer 7 and a balancing weight 8, and each base 1 is provided with a base plate (flat plate) 101 (approximate to a regular octagon) and a cylindrical boss 103 which extends upwards in the central area (central position) of the upper end face of the base plate. In each base, 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 are used for connecting the bottom plate with the installation surface on the rotating outer side of the centrifugal machine, the central area (the center) of the upper end surface of the boss 103 is provided with a cylindrical first concave 104 matched with one installation disc 2 corresponding to the boss, the central area (the center) of the lower end surface of the bottom plate 101 is provided with a cylindrical second concave 106, and the bottom surface of the first concave 104 is provided with a first central hole 105 which is longitudinally arranged and is communicated with the second concave 106. The edge of the lower end surface of the bottom plate 101 is uniformly distributed with a plurality of gaskets 107 which are transversely arranged, the plurality of screw connecting holes 102 are in one-to-one correspondence with the plurality of gaskets 107, each gasket 107 is positioned at one screw connecting hole 102 corresponding to the corresponding gasket, a plurality of first notches 3 'used for the cable 6 to pass through are arranged on the side wall of the boss 103, a plurality of second notches 3 used for the cable 6 to pass through are arranged on the side surface of the bottom plate 101, and the plurality of first notches 3' are in one-to-one correspondence with the plurality of second notches 3.
As shown in fig. 1, 2, 3, 4, 5, and 6, in each mounting plate, the mounting plate 2 has a circular panel (flat plate) 201, and a central region (center) of the panel 201 has a second center hole 202 disposed in a longitudinal direction. The structure of installing a mounting plate 2 on each base 1 is that the panel 201 is disposed in the first recess 104 and in clearance fit with the first recess 104, the panel 201 is fixedly connected with the bottom surface of the first recess 104 through a plurality of first screws 4, and the plurality of first screws 4 are uniformly distributed along the circumferential direction at the edge of the panel 201. The structure of the accelerometer 7 mounted on one mounting plate is that when the negative value of the accelerometer is measured, the shell head of the accelerometer 7 is fixedly connected with the upper end surface of the mounting plate 2 through a plurality of second screws (three second screws) 5, and the shell body of the accelerometer 7 is in clearance fit with the second central hole 202 and stretches into the first central hole 105; when measuring the positive value of the accelerometer, the shell head of the accelerometer 7 is fixedly connected with the lower end surface of the mounting plate 2 through a plurality of second screws (three second screws) 5, and the shell body of the accelerometer 7 is in clearance fit with the second central hole 202 and extends upwards from the mounting plate. The other mounting plate is provided with a counterweight 8, the head of the counterweight is fixedly connected with the upper end surface of the mounting plate through a plurality of third screws (three third screws) 5', and the shell of the counterweight is in clearance fit with the second central hole 202 and extends into the first central hole 105.
As shown in fig. 1, 2, 3, 4, 5, and 6, the number of screw holes 102 is eight in each base, and accordingly, the number of spacers 107 is eight. In each seat, the dimensions (diameter and thickness) of the first recess 104 described above are the same as the dimensions of the second recess 106. The diameter of the first central bore 105 is larger than the diameter of the second central bore 202. In each base, the number of the first notches 3' and the second notches 3 is one or two. In the structure that each base 1 is provided with one mounting plate 2, the number of the first screws 4 is four, and each first screw 4 is a hexagon socket head cap screw. The edge of the panel 201 is uniformly distributed with four screw mounting holes 203 for mounting the first screws in the circumferential direction.
The accelerometer centrifugal test tool is used for being matched with a TBL-SC0101-A miniature centrifuge with a temperature control box, and an SNJ-35 type accelerometer is installed and fixed, so that the auxiliary test equipment detects technical parameters such as the measuring range, the first-order nonlinearity, the second-order nonlinear coefficient and the like of the SNJ-35 type accelerometer. Basic parameters: 1. size: tool outline dimensions length x width x height: 140mm by 40mm. Length of power supply cable: 5m, (transit) cable length of the invention: 15cm.2. Weight: 1.1kg. Critical dimensions: in order to ensure the test precision of the accelerometer, the machining precision of the tool is improved appropriately, the parallelism requirement is defined as a critical dimension, the design requirement refers to the GB/T1184 parallelism tolerance value, and the tolerance level is more than 5 levels, wherein the parallelism of the mounting surface of the base is less than 0.02mm, and the parallelism of the mounting plate is less than 0.012mm.
The application method of the invention comprises the following steps: 1. and taking out the tool from the packaging box, and checking all parts and accessories on the boxing list. 2. The tool is placed on a stable and clean tabletop near the centrifugal machine, and attention is paid to protecting the tool mounting surface and preventing damages such as knocks, scratches and the like. 3. And respectively installing the two bases on the two installation surfaces at the outer side of the rotation of the centrifugal machine, and then respectively installing the installation discs at the corresponding positions of the bases. 4. And connecting the centrifuge tooling adapter cable to a user socket, connecting the centrifuge tooling power supply cable with a power supply, and confirming that the connection is good. 5. The accelerometer and the balancing weight are respectively arranged on the two mounting discs at the two ends of the centrifugal machine, and the mounting modes for testing the negative value and the positive value of the accelerometer are shown in fig. 5 and 6. If two products are tested simultaneously, the use of a counterweight is not required. 6. After the installation is completed, the accelerometer can be tested according to the test program of the accelerometer.
Through experiments, the invention has the advantages of reliable operation, convenient installation and operation, practicality, high test precision and simple structure, can measure the negative value of the accelerometer and the positive value of the accelerometer, and improves the (test) work efficiency by more than 25 percent compared with the prior related technology.
Claims (5)
1. The centrifugal test tool for the accelerometer is provided with the accelerometer (7), a cable (6) electrically connected with the accelerometer and bases (1), and is characterized in that the number of the bases (1) is two, each base (1) is provided with a detachable mounting disc (2) so that the number of the mounting discs (2) is two, the accelerometer (7) and a balancing weight (8) are respectively arranged on the two mounting discs (2), and each base (1) is provided with a bottom plate (101) and a cylindrical boss (103) which extends upwards in the central area of the upper end face of the bottom plate;
in each base, a plurality of longitudinally arranged screw connection holes (102) for connecting the base plate with a mounting surface at the rotating outer side of the centrifugal machine are uniformly distributed on the edge of the base plate (101), a cylindrical first concave (104) matched with one mounting plate (2) corresponding to the base plate is arranged in the central area of the upper end surface of the boss (103), a cylindrical second concave (106) is arranged in the central area of the lower end surface of the base plate (101), a first central hole (105) which is longitudinally arranged and communicated with the second concave (106) is arranged on the bottom surface of the first concave (104), a plurality of transversely arranged gaskets (107) are uniformly distributed on the edge of the lower end surface of the base plate (101), the plurality of screw connection holes (102) are in one-to-one correspondence with the plurality of gaskets (107), each gasket (107) is positioned at one screw connection hole (102) corresponding to the screw connection hole, a plurality of first notches (3 ') for the cables (6) to pass through from the side wall of the boss (103), a plurality of first notches (3') for the cables (6) to pass through from the side surface of the base plate (101), and a plurality of first notches (3 ') for the cables (6) to pass through from the first notches (3') to the first notches;
in each mounting plate, the mounting plate (2) is provided with a circular panel (201), and a central area of the panel (201) is provided with a second central hole (202) which is longitudinally arranged;
the structure of each base (1) is provided with a mounting disc (2), wherein the panel (201) is arranged in the first concave (104) and in clearance fit with the first concave (104), the panel (201) is fixedly connected with the bottom surface of the first concave (104) through a plurality of first screws (4), the plurality of first screws (4) are uniformly distributed along the circumferential direction at the edge of the panel (201), and each first screw (4) is an inner hexagonal cylindrical head screw;
the structure of installing the accelerometer (7) on one installation plate is that when measuring the negative value of the accelerometer, the shell head of the accelerometer (7) is fixedly connected with the upper end surface of the installation plate (2) through a plurality of second screws (5), and the shell body of the accelerometer (7) is in clearance fit with the second center hole (202) and stretches into the first center hole (105); when the positive value of the accelerometer is measured, the shell head of the accelerometer (7) is fixedly connected with the lower end surface of the mounting plate (2) through a plurality of second screws (5), and the shell of the accelerometer (7) is in clearance fit with the second center hole (202) and extends upwards from the mounting plate;
the structure of installing the balancing weight (8) on the other installation disk is that the head of the balancing weight is fixedly connected with the upper end surface of the installation disk through a plurality of third screws (5'), and the shell body of the balancing weight is in clearance fit with the second center hole (202) and stretches into the first center hole (105).
2. The tool according to claim 1, wherein in each base, the number of screw holes (102) is eight, and correspondingly the number of spacers (107) is eight.
3. The tool according to claim 1, wherein in each base, the first recess (104) has the same size as the second recess (106).
4. The centrifugal test fixture of an accelerometer according to claim 1, wherein in each base, the number of the first notches (3') and the second notches (3) is one or two.
5. The centrifugal test fixture of the accelerometer according to claim 1, wherein in the structure that each base (1) is provided with one mounting plate (2), the number of the first screws (4) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486367.1A CN110174529B (en) | 2019-06-05 | 2019-06-05 | Accelerometer centrifugation test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486367.1A CN110174529B (en) | 2019-06-05 | 2019-06-05 | Accelerometer centrifugation test fixture |
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| Publication Number | Publication Date |
|---|---|
| CN110174529A CN110174529A (en) | 2019-08-27 |
| CN110174529B true CN110174529B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910486367.1A Active CN110174529B (en) | 2019-06-05 | 2019-06-05 | Accelerometer centrifugation test fixture |
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| Country | Link |
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| CN (1) | CN110174529B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115728517B (en) * | 2022-11-14 | 2024-04-02 | 北京自动化控制设备研究所 | Non-linear measurement tool and device for calibration-free accelerometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK136976A (en) * | 1976-03-29 | 1977-09-30 | Bryel & Kjer A/S | |
| FR2880690A1 (en) * | 2005-01-12 | 2006-07-14 | Vibrasens Sarl | Compression accelerometer for e.g. rotating machine, has annular ferroelectric piezoelectric unit with two zones polarized in opposite directions, where only one zone is subjected to inertial force of vibrating counterweight |
| RU2393488C1 (en) * | 2009-04-06 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования "Уральский государственный университет путей сообщения" (УрГУПС) | Acceleration device for generating standard accelerations when testing and calibrating accelerometres |
| CN102411066A (en) * | 2011-11-25 | 2012-04-11 | 河南柴油机重工有限责任公司 | Calibration device of triaxial acceleration sensor and calibration method thereof |
| CN102508033A (en) * | 2011-09-29 | 2012-06-20 | 中国航空工业第六一八研究所 | Device for testing accelerometer shell |
| CN107300628A (en) * | 2017-08-25 | 2017-10-27 | 柳州长虹机器制造公司 | It is a kind of to test the method that equipment tests many specification accelerometers with special accelerometer |
| CN209946198U (en) * | 2019-06-05 | 2020-01-14 | 中国人民解放军陆军工程大学 | Accelerometer centrifugal test tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202216970U (en) * | 2011-09-29 | 2012-05-09 | 中国航空工业第六一八研究所 | On-line calibrating tool for accelerometer debugging equipment |
-
2019
- 2019-06-05 CN CN201910486367.1A patent/CN110174529B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK136976A (en) * | 1976-03-29 | 1977-09-30 | Bryel & Kjer A/S | |
| FR2880690A1 (en) * | 2005-01-12 | 2006-07-14 | Vibrasens Sarl | Compression accelerometer for e.g. rotating machine, has annular ferroelectric piezoelectric unit with two zones polarized in opposite directions, where only one zone is subjected to inertial force of vibrating counterweight |
| RU2393488C1 (en) * | 2009-04-06 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования "Уральский государственный университет путей сообщения" (УрГУПС) | Acceleration device for generating standard accelerations when testing and calibrating accelerometres |
| CN102508033A (en) * | 2011-09-29 | 2012-06-20 | 中国航空工业第六一八研究所 | Device for testing accelerometer shell |
| CN102411066A (en) * | 2011-11-25 | 2012-04-11 | 河南柴油机重工有限责任公司 | Calibration device of triaxial acceleration sensor and calibration method thereof |
| CN107300628A (en) * | 2017-08-25 | 2017-10-27 | 柳州长虹机器制造公司 | It is a kind of to test the method that equipment tests many specification accelerometers with special accelerometer |
| CN209946198U (en) * | 2019-06-05 | 2020-01-14 | 中国人民解放军陆军工程大学 | Accelerometer centrifugal test tool |
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| CN110174529A (en) | 2019-08-27 |
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