CN112067845A - Quartz pendulum accelerometer long-term stability testing tool and testing method - Google Patents
Quartz pendulum accelerometer long-term stability testing tool and testing method Download PDFInfo
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- CN112067845A CN112067845A CN202010921230.7A CN202010921230A CN112067845A CN 112067845 A CN112067845 A CN 112067845A CN 202010921230 A CN202010921230 A CN 202010921230A CN 112067845 A CN112067845 A CN 112067845A
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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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Abstract
The invention relates to a long-term stability testing tool and a testing method for a quartz accelerometer, wherein the tool comprises a base and a testing transition plate; the base fixing surface at one end of the base is contacted with and fixedly connected with a special test dividing head for the accelerometer or a working surface of the servo turntable; the upper end surface of the base is a transition plate mounting surface, the upper end surface is provided with two positioning pin holes, each positioning pin is vertically and fixedly arranged, and the part of the upper end surface of the base, which is close to each edge, is provided with a threaded hole; a plurality of accelerometer mounting positions are uniformly distributed on the test transition plate, and a circular pin hole and a long circular pin hole are formed in the test transition plate; a screw mounting hole is also formed in the test transition plate; the test transition plate is arranged at the upper end of the base, the upper half sections of the two positioning pins are respectively inserted into the two pin holes for positioning and matching, the screw mounting holes in the test transition plate are aligned with the threaded holes in the base one by one, and fastening screws are mounted to enable the test transition plate to be fixedly connected with the base. The invention realizes the measurement of multiple batches of accelerometers and improves the utilization rate of equipment.
Description
Technical Field
The invention belongs to the technical field of accelerometer testing, and particularly relates to a tool and a method for testing long-term stability of a quartz pendulum type accelerometer.
Background
The quartz pendulum type accelerometer is a mechanical pendulum type accelerometer taking a quartz pendulum as a core sensitive element, is used for measuring linear motion information of a motion carrier, is one of two major core elements of an inertial navigation system, and the precision and the performance of the quartz pendulum type accelerometer determine the precision and the performance of the inertial navigation system to a great extent. Particularly, in the inertial navigation system which continuously works for a long time, navigation errors caused by accelerometer errors are accumulated over time, and in order to further improve the precision and the long-time navigation capability of the inertial navigation system, the long-term stability of the accelerometer must be improved.
The high-precision quartz pendulum type accelerometer needs to be comprehensively tested before leaving a factory, wherein the test method comprises long-term stability test, the test period is short and one month is long and one year is long according to different requirements of system use, the test method of the long-term stability at the present stage is to install the accelerometer to be tested on a test tool fixed on a dividing head, in order to ensure that the test precision is not interfered, the accelerometer body cannot be disassembled and re-assembled in the test period, otherwise, the test method is limited by equipment and a test system, the number of one-time test cannot be large, and therefore, the utilization rate of the equipment is low, the test period is long, and the production cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a tool and a method for testing the long-term stability of a quartz accelerometer, so that the tool can be integrally disassembled and repeatedly assembled without affecting the testing precision during long-term testing of the accelerometer, the measurement of multiple batches of accelerometers can be realized, the utilization rate of equipment is improved, and the testing cost is reduced.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a quartz accelerometer long-term stability test fixture which characterized in that: comprises a base and a test transition plate;
one end of the base is a base fixing surface, and the base is contacted with a special test dividing head for the accelerometer or a working surface of the servo turntable through the base fixing surface and is fixedly connected with the test dividing head; a thread passing cavity is arranged in the base, and thread passing long holes communicated with the thread passing cavity are arranged at the two side parts of the base; the upper end surface of the base is a transition plate mounting surface, two positioning pin holes are arranged on the upper end surface of the base, and the central connecting line direction of the two positioning pin holes is arranged along the direction from one end of the base to the other end of the base; a positioning pin is vertically and fixedly arranged in each positioning pin hole, and the upper half sections of the two positioning pins extend upwards from the upper end surface of the base; threaded holes are formed in the upper end face of the base, close to the edges;
a plurality of accelerometer mounting positions are uniformly distributed on the test transition plate, the upper end surface of each accelerometer mounting position is an accelerometer mounting surface, an accelerometer mounting hole is formed in each accelerometer mounting position, and a threaded hole for fixing an accelerometer is formed in the periphery of each accelerometer mounting hole; a round pin hole and a long round pin hole are arranged on the test transition plate; screw mounting holes are also formed in the positions, close to the edges, of the test transition plate;
the test transition plate is arranged at the upper end of the base, the upper half sections of the two positioning pins are respectively in plug-in positioning fit with the two pin holes, the screw mounting holes in the test transition plate are aligned with the threaded holes in the base one by one, and fastening screws are mounted, so that the test transition plate is detachably and fixedly connected with the base.
Further: four rectangular bosses are uniformly distributed at the upper end of the test transition plate, accelerometer mounting surfaces are formed at the upper ends of the rectangular bosses, and accelerometer mounting positions are respectively arranged at the two ends and the middle part of each rectangular boss area.
A long-term stability test method for a quartz accelerometer is characterized in that the long-term stability test tool for the quartz accelerometer comprises the following steps:
firstly, fixedly mounting a base on a test dividing head or a servo rotary table special for an accelerometer through screws, leveling the base in the mounting process, and ensuring that the mounting surface of a transition plate of the fixed base is horizontal;
step two, fixedly mounting the accelerometer to be tested on the test transition plate, and mounting a screw for connecting the accelerometer and the test transition plate by using a moment screwdriver, so as to ensure the consistency of locking force and avoid dismounting in the whole test period;
positioning the test transition plate provided with the accelerometer through two positioning pins, mounting the test transition plate on a base, locking and positioning the test transition plate and the base by using a fastening screw, and ensuring the consistency of locking torque by using a torque screwdriver when the fastening screw is mounted;
step four, connecting a test system of the accelerometer, and testing the accelerometer according to requirements;
and step five, after the coefficient or output test of the accelerometer is completed, disassembling the test transition plate, replacing another group of test transition plates, and starting the test again.
The invention has the advantages and positive effects that:
1. the invention provides a positioning reference for the test transition plate through the two positioning pins fixed on the base and the transition plate mounting surface at the upper end of the base, ensures the complete positioning of the test transition plate on the base, and ensures the position repeatability of the test transition plate after repeated disassembly and assembly, thus realizing repeated disassembly and assembly of the test transition plate and facilitating batch installation and test.
2. The test transition plate is connected with the base through the mounting surface and the two positioning pins, so that repeated mounting precision is guaranteed, periodic measurement can be realized, the utilization rate of test equipment is improved, and the test capability can be improved by at least 3 times under the condition of not increasing the test equipment.
3. The test method is easy to implement, and the moment screwdrivers are adopted to control the locking force when the accelerometer is locked and installed and the test transition plate is fixed to the base, so that the consistency of locking is ensured, and the precision of repeated installation and repeated test is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the test fixture of the present invention;
FIG. 2 is a schematic perspective view of a base according to the present invention;
FIG. 3 is a schematic perspective view of a test transition plate according to the present invention;
FIG. 4 is a flow chart of a test method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention is not limited thereto.
A long-term stability test tool for a quartz accelerometer is disclosed, please refer to FIGS. 1-3: comprising a base 1 and a test transition.
The base can adopt a square structure shown in the attached drawings, one end of the base is a base fixing surface 1.5, and the base is contacted with a test dividing head special for the accelerometer or a working surface of the servo turntable 100 through the base fixing surface and is fixedly connected with the working surface through screws. The base is internally provided with a wire passing cavity 1.6, two side parts of the base are provided with wire passing long holes 1.1 communicated with the wire passing cavity, and the wire passing during the test is realized. The upper end face of the base is a transition plate mounting face 1.3, two positioning pin holes 1.2 are formed in the upper end face of the base, and the central connecting line direction of the two positioning pin holes is arranged along the direction from one end of the base to the other end of the base. And a positioning pin 2 is vertically and fixedly arranged in each positioning pin hole, and the upper half sections of the two positioning pins extend upwards from the upper end surface of the base. The upper end surface of the base is provided with threaded holes 1.4 near the edges. On the basis of the base structure, the lower end face of the base can also be set as another transition plate mounting face, the two transition plate mounting faces are arranged in parallel, the parallelism and the flatness both need to meet the requirement of test precision, specifically, the flatness of the transition plate mounting face is generally superior to 0.005mm, and the parallelism of the two transition plate mounting faces is generally superior to 0.01 mm. And the positioning pin and the processing threaded hole are installed, so that two test transition plates can be installed at the same time in one test, and the test effect is greatly improved.
A plurality of accelerometer mounting positions are uniformly distributed on the test transition plate, the upper end face of each accelerometer mounting position is an accelerometer mounting surface 3.4, an accelerometer mounting hole 3.6 is formed in each accelerometer mounting position, and a threaded hole 3.5 for fixing an accelerometer is formed in the periphery of each accelerometer mounting hole; a round pin hole 3.1 and a long round pin hole 3.2 are arranged on the test transition plate; and screw mounting holes 3.3 are also formed in the positions, close to the edges, of the test transition plate.
The test transition plate is arranged at the upper end of the base, the upper half sections of the two positioning pins are respectively in plug-in positioning fit with the two pin holes, the screw mounting holes in the test transition plate are aligned with the threaded holes in the base one by one, and fastening screws are mounted, so that the test transition plate is detachably and fixedly connected with the base.
In the above structure, the test transition plate is generally designed to be capable of mounting the accelerometers to be tested as much as possible, in the invention, 12 accelerometers can be preferably mounted on one test transition plate at one time, and the specific structure is as follows: four rectangular bosses are uniformly distributed at the upper end of the test transition plate, accelerometer mounting surfaces are formed at the upper ends of the rectangular bosses, and accelerometer mounting positions are respectively arranged at the two ends and the middle part of each rectangular boss area.
Referring to fig. 4, the invention discloses a method for testing long-term stability of a quartz accelerometer, which includes the following steps:
firstly, fixedly mounting a base on a test dividing head or a servo rotary table special for an accelerometer through screws, leveling the base in the mounting process, and ensuring that the mounting surface of a transition plate of the fixed base is horizontal; in the subsequent use process, the horizontal detection and adjustment of the mounting surface are required to be carried out regularly;
step two, fixedly mounting the accelerometer to be tested on the test transition plate, and mounting a screw for connecting the accelerometer and the test transition plate by using a moment screwdriver, so as to ensure the consistency of locking force and avoid dismounting in the whole test period;
and step three, positioning the test transition plate provided with the accelerometer through two positioning pins, mounting the test transition plate on a base, locking and positioning the test transition plate and the base by using a fastening screw, and adopting a torque screwdriver when the fastening screw is mounted to ensure the consistency of the locking torque.
Step four, connecting a test system of the accelerometer, and testing the accelerometer according to requirements;
and step five, after the coefficient or output test of the accelerometer is completed, disassembling the test transition plate, replacing another group of test transition plates, and starting the test again.
By adopting the test method, the test interval is determined, so that the stability test of multiple batches of accelerometers can be completed in a longer period, and the test cost is greatly reduced. Through repeated installation and testing in a certain period, the testing requirement for improving the long-term stability of the accelerometer can be met.
Although the embodiments and figures of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and figures.
Claims (3)
1. The utility model provides a quartz accelerometer long-term stability test fixture which characterized in that: comprises a base and a test transition plate;
one end of the base is a base fixing surface, and the base is contacted with a special test dividing head for the accelerometer or a working surface of the servo turntable through the base fixing surface and is fixedly connected with the test dividing head; a thread passing cavity is arranged in the base, and thread passing long holes communicated with the thread passing cavity are arranged at the two side parts of the base; the upper end surface of the base is a transition plate mounting surface, two positioning pin holes are arranged on the upper end surface of the base, and the central connecting line direction of the two positioning pin holes is arranged along the direction from one end of the base to the other end of the base; a positioning pin is vertically and fixedly arranged in each positioning pin hole, and the upper half sections of the two positioning pins extend upwards from the upper end surface of the base; threaded holes are formed in the upper end face of the base, close to the edges;
a plurality of accelerometer mounting positions are uniformly distributed on the test transition plate, the upper end surface of each accelerometer mounting position is an accelerometer mounting surface, an accelerometer mounting hole is formed in each accelerometer mounting position, and a threaded hole for fixing an accelerometer is formed in the periphery of each accelerometer mounting hole; a round pin hole and a long round pin hole are arranged on the test transition plate; screw mounting holes are also formed in the positions, close to the edges, of the test transition plate;
the test transition plate is arranged at the upper end of the base, the upper half sections of the two positioning pins are respectively in plug-in positioning fit with the two pin holes, the screw mounting holes in the test transition plate are aligned with the threaded holes in the base one by one, and fastening screws are mounted, so that the test transition plate is detachably and fixedly connected with the base.
2. The quartz accelerometer long-term stability test tool of claim 1, characterized in that: four rectangular bosses are uniformly distributed at the upper end of the test transition plate, accelerometer mounting surfaces are formed at the upper ends of the rectangular bosses, and accelerometer mounting positions are respectively arranged at the two ends and the middle part of each rectangular boss area.
3. A long-term stability testing method for a quartz accelerometer is characterized in that the long-term stability testing tool for the quartz accelerometer of claim 1 or 2 is adopted, and comprises the following steps:
firstly, fixedly mounting a base on a test dividing head or a servo rotary table special for an accelerometer through screws, leveling the base in the mounting process, and ensuring that the mounting surface of a transition plate of the fixed base is horizontal;
step two, fixedly mounting the accelerometer to be tested on the test transition plate, and mounting a screw for connecting the accelerometer and the test transition plate by using a moment screwdriver, so as to ensure the consistency of locking force and avoid dismounting in the whole test period;
positioning the test transition plate provided with the accelerometer through two positioning pins, mounting the test transition plate on a base, locking and positioning the test transition plate and the base by using a fastening screw, and ensuring the consistency of locking torque by using a torque screwdriver when the fastening screw is mounted;
step four, connecting a test system of the accelerometer, and testing the accelerometer according to requirements;
and step five, after the coefficient or output test of the accelerometer is completed, disassembling the test transition plate, replacing another group of test transition plates, and starting the test again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921230.7A CN112067845A (en) | 2020-09-04 | 2020-09-04 | Quartz pendulum accelerometer long-term stability testing tool and testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010921230.7A CN112067845A (en) | 2020-09-04 | 2020-09-04 | Quartz pendulum accelerometer long-term stability testing tool and testing method |
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| CN112067845A true CN112067845A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010921230.7A Pending CN112067845A (en) | 2020-09-04 | 2020-09-04 | Quartz pendulum accelerometer long-term stability testing tool and testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686358A (en) * | 2021-08-20 | 2021-11-23 | 中国航空工业集团公司西安飞行自动控制研究所 | Device for improving stability of misalignment angle of accelerometer and mounting method thereof |
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| US20120036931A1 (en) * | 2010-08-16 | 2012-02-16 | Hans Paulson | Method and Apparatus to Test an Accelerometer |
| 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 |
| CN207036894U (en) * | 2017-06-30 | 2018-02-23 | 廊坊市北斗神舟测控仪器有限公司 | For testing the test fixture of quartz flexibility acceleration sensor long-time stability |
| CN208888275U (en) * | 2018-09-19 | 2019-05-21 | 中国船舶重工集团公司第七0七研究所 | A kind of device for the test of quartz flexible accelerometer long term repeatability |
| CN109917153A (en) * | 2017-12-12 | 2019-06-21 | 航天科工惯性技术有限公司 | Accelerometer parameter calibration device and the parameter calibration method for using it |
| CN209946197U (en) * | 2019-06-05 | 2020-01-14 | 中国人民解放军陆军工程大学 | Accelerometer gravity field test tool |
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2020
- 2020-09-04 CN CN202010921230.7A patent/CN112067845A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120036931A1 (en) * | 2010-08-16 | 2012-02-16 | Hans Paulson | Method and Apparatus to Test an Accelerometer |
| CN207036894U (en) * | 2017-06-30 | 2018-02-23 | 廊坊市北斗神舟测控仪器有限公司 | For testing the test fixture of quartz flexibility acceleration sensor long-time stability |
| 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 |
| CN109917153A (en) * | 2017-12-12 | 2019-06-21 | 航天科工惯性技术有限公司 | Accelerometer parameter calibration device and the parameter calibration method for using it |
| CN208888275U (en) * | 2018-09-19 | 2019-05-21 | 中国船舶重工集团公司第七0七研究所 | A kind of device for the test of quartz flexible accelerometer long term repeatability |
| CN209946197U (en) * | 2019-06-05 | 2020-01-14 | 中国人民解放军陆军工程大学 | Accelerometer gravity field test tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686358A (en) * | 2021-08-20 | 2021-11-23 | 中国航空工业集团公司西安飞行自动控制研究所 | Device for improving stability of misalignment angle of accelerometer and mounting method thereof |
| CN113686358B (en) * | 2021-08-20 | 2024-02-13 | 中国航空工业集团公司西安飞行自动控制研究所 | Device for improving stability of misalignment angle of accelerometer and mounting method thereof |
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Application publication date: 20201211 |
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