CN102998481A - Novel electromagnetic accelerometer structure - Google Patents
Novel electromagnetic accelerometer structure Download PDFInfo
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- CN102998481A CN102998481A CN2012105387416A CN201210538741A CN102998481A CN 102998481 A CN102998481 A CN 102998481A CN 2012105387416 A CN2012105387416 A CN 2012105387416A CN 201210538741 A CN201210538741 A CN 201210538741A CN 102998481 A CN102998481 A CN 102998481A
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Abstract
The invention relates to a novel electromagnetic accelerometer structure which comprises a quartz pendulous reed component, magnetic conductance ring components and a casing component. The electromagnetic accelerometer structure is of a push-pull type. A torquer coil component and the magnetic conductance ring components are used in pairs, and mirrors are arranged above and under a quartz pendulous reed symmetrically. Upper and lower magnetic conductance rings are connected through a connection ring by a laser welding method. A cavity of each of the magnetic conductance ring components is provided with a thermomagnetic compensation ring, a permanent magnet radiation ring and an electromagnetic shielding ring which are coaxially and successively mounted on a central shaft of a magnetic conductance ring. The novel electromagnetic accelerometer structure is designed on the basis of the successful design of small permanent magnet radiation rings. The novel electromagnetic accelerometer structure has the advantages that working air-gap magnetic fields are uniform, an axial smooth area is large, flux leakage of a quartz pendulous reed area is low, and the impact resistance is high. Accordingly, the bias of an accelerometer can be reduced, and the measuring range and the stability are improved. The novel electromagnetic accelerometer structure is applicable to high-precision inertial navigation and guidance measurement systems and occasions with wide-range acceleration measurement and impact resistant requirements.
Description
Technical field
The present invention relates to the electromagnetic accelerometer in the measurement instrument field, particularly a kind of be applicable to High Accuracy Inertial guidance measuring system and wide range acceleration analysis and shock resistance demand electromagnetic accelerometer.
Background technology
At present, the electromagnetic accelerometer structure has detailed introduction in United States Patent (USP) (patent No. 4250757), and its version as shown in Figure 1.It comprises magnetic guiding loop 1, pyromagnetic compensated loop 2, cylindrical permanent magnet 3, magnetic conductive board 4, quartz pendulous reed 5, torquer coil 6, torquer coil skeleton 7.Magnetic guiding loop, pyromagnetic compensated loop, cylindrical permanent magnet and magnetic conductive board form the magnetic guiding loop assembly.Quartz pendulous reed, torquer coil and coil rack form the quartz pendulous reed assembly.The magnetic guiding loop assembly uses the symmetrical installation of coaxial mirror image in pairs, and the quartz pendulous reed assembly is installed between two magnetic guiding loop assemblies.What the connection between the upper lower magnetic guiding loop assembly was adopted is epoxide-resin glue.
Because what above-mentioned electromagnetic accelerometer adopted is cylindrical permanent magnet, the magnetic direction of generation is axially, and electromagnetic force needs magnetic direction for radially, therefore changes over radial magnetic field by magnetic conductive board, considers air-gap field intensity, and general magnetic conductive board design comparison is thin.There is following several respects limitation in this electromagnetic acceleration gauge body:
1, permanent magnet adopts the axial charging structure, and magnetic direction points to quartz pendulous reed (along the accelerometer sensitive direction of principal axis), become radially even magnetic conductive board has changed magnetic direction, but quartz pendulous reed assembly present position still has certain stray field.Stray field is inconsistent up and down, can cause magnetic bias, can produce electromagnetic interference (EMI) moment to the quartz pendulous reed assembly, the biasing of increased acceleration meter.Only have two permanent magnets to magnetize magnetic induction density when in full accord, this impact just can be avoided, but is difficult to control in the real work.
2, for improving magnetic induction density, the thickness of magnetic conductive board can not be very large, the level and smooth district of working gas gap magnetic induction density will be restricted, might make part torquer coil working in the non-flat skating area of gap density, " increase and decrease magnetic effect " meeting increased acceleration meter of quartz pendulous reed assembly motion generation is non-linear like this, affects raising and the stability of resolution.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of electromagnet arrangements of accelerometers is provided.
The present invention solves its technical matters and is achieved through the following technical solutions:
A kind of electromagnet arrangements of accelerometers, comprise quartz pendulous reed assembly and magnetic guiding loop assembly, the quartz pendulous reed assembly contains quartz pendulous reed and torquer coil block, torquer coil block and magnetic guiding loop assembly use in pairs, the mirror image symmetry is installed in the upper and lower of quartz pendulous reed, it is characterized in that: the magnetic guiding loop assembly contains magnetic guiding loop, permanent magnet radiation ring, ring shielding magnetism and pyromagnetic compensated loop, and the inner chamber of each magnetic guiding loop assembly is from the magnetic guiding loop central shaft successively pyromagnetic compensated loop of coaxial installation, permanent magnet radiation ring and ring shielding magnetism.
And coaxial mounted permanent magnet radiation ring is the permanent magnet radiation ring of radial magnetizing on magnetic guiding loop lumen centers axle.
And described two magnetic guiding loop assemblies pass through the abutment ring laser bonding together, and this abutment ring is arranged on the outside of two magnetic guiding loop junctions, namely at the periphery fluting of magnetic guiding loop, abutment ring are absorbed in the groove, and two peripheries alignment are welded and are fixedly mounted with.
And described pyromagnetic compensated loop is positioned at the below of permanent magnet radiation ring, and ring shielding magnetism is positioned at the top of permanent magnet radiation ring.
Advantage of the present invention and beneficial effect are:
1, this electromagnetic accelerometer coaxial mounted permanent magnet on magnetic guiding loop lumen centers axle is the permanent magnet radiation ring of radial magnetizing.Permanent magnet radiation ring adopts radial magnetizing can directly satisfy the demand of radial magnetic field, does not need to carry out the magnetic field break-in with magnetic conductive board.Permanent magnet is in the situation that satisfy working gas gap magnetic induction density demand, increased the level and smooth district of working gas gap magnetic induction density, can effectively reduce " increase and decrease magnetic effect " that quartz pendulous reed assembly motion has brought, and then reduce non-linear and disturbance torque, improve accelerometer resolution, reduce biasing.
2, the radial magnetic field that directly produces of the permanent magnet radiation ring in this electromagnetic accelerometer, a small amount of leakage field is axially unavoidably being arranged, for reducing it to the impact of quartz pendulous reed assembly, the coaxial ring shielding magnetism of having installed on the magnetic guiding loop central shaft above the permanent magnet radiation ring, can eliminate stray field fully theoretically, therefore can eliminate the suction of stray field to existing magnetic medium to cause in the quartz pendulous reed assembly, reduce accelerometer and partially be worth, improve resolution.
3, the magnetic field structure of this electromagnetic accelerometer also helps the inhomogeneity raising of working gas gap magnetic field intensity, increases axially level and smooth district, can improve the acceleration analysis scope.
4, the connection between two of this electromagnetic accelerometer magnetic guiding loop assemblies has been adopted by the abutment ring laser bonding together, and this laser bonding is conducive to strengthen impact resistance and the freedom from vibration of accelerometer.
5, the present invention is a kind of design science, electromagnetic accelerometer rational in infrastructure, this accelerometer have resolution high, partially be worth low, stablize the advantages such as height and impact resistance are strong, be applicable to the occasion of High Accuracy Inertial guidance measuring system and wide range acceleration analysis and shock resistance demand.
Description of drawings
Fig. 1 is that present electromagnetic accelerometer two dimension axle cuts open figure;
Fig. 2 is that the electromagnet arrangements of accelerometers two dimension axle that the present invention proposes cuts open figure.
Among the figure: 1. magnetic guiding loop; 2. pyromagnetic compensated loop; 3. cylindrical permanent magnet; 4. magnetic conductive board; 5. quartz pendulous reed; 6. torquer coil; 7. torquer coil skeleton; 8. pyromagnetic compensated loop; 9. permanent magnet radiation ring; 10. ring shielding magnetism; 11. abutment ring; 12. laser bonding.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of electromagnet arrangements of accelerometers comprises quartz pendulous reed assembly and magnetic guiding loop assembly, and quartz pendulous reed assembly and magnetic guiding loop assembly are installed in the housing unit (not shown).The quartz pendulous reed assembly contains quartz pendulous reed 5 and torquer coil block, the torquer coil block comprises torquer coil 6 and torquer coil skeleton 7, torquer coil is equidistant, wound in parallel forms the torquer coil block at torquer coil skeleton periphery, torquer coil block and magnetic guiding loop assembly use in pairs, the mirror image symmetry is installed in the upper and lower of quartz pendulous reed, and the torquer coil lead-in wire is drawn by the gold-plated film exit on the quartz pendulous reed.
The magnetic guiding loop assembly is two columnar cylinders.Two coaxial mirror image symmetries of magnetic guiding loop assembly are installed in the above and below of quartz pendulous reed assembly.The magnetic guiding loop assembly contains magnetic guiding loop, permanent magnet radiation ring, ring shielding magnetism and pyromagnetic compensated loop, and the inner chamber of each magnetic guiding loop assembly is from magnetic guiding loop the central shaft all successively pyromagnetic compensated loop 8 of coaxial installation, permanent magnet radiation ring 9 and ring shielding magnetism 10.It is inboard that pyromagnetic compensated loop, permanent magnet radiation ring and ring shielding magnetism all are positioned at the torquer coil block.Permanent magnet radiation ring is radial magnetizing.
For guaranteeing assembly precision, first pyromagnetic compensated loop is installed on the permanent magnet radiation ring, be installed on the magnetic guiding loop again behind the formation assembly.Pyromagnetic compensated loop is used for the permanent magnet radiation ring changes of magnetic field that compensation brings because of temperature variation.Coaxial installation ring shielding magnetism above permanent magnet radiation ring is used for the leakage field that the shielding permanent magnet radiation ring may exist in the axial direction.
Two magnetic guiding loop assemblies pass through abutment ring 11 laser bonding 12 together, and this abutment ring is arranged on the outside of two magnetic guiding loop junctions.For guaranteeing the abutment ring positional precision, have mounting groove at the magnetic guiding loop cylindrical, abutment ring is trapped in the groove, cylindrical aligns with the magnetic guiding loop cylindrical and welds.
The principle of work of this electromagnetic accelerometer is:
The permanent magnet radiation ring of radial magnetizing produces radial magnetic field, consists of the closed loop magnetic loop with magnetic guiding loop.Torquer coil on the quartz pendulous reed assembly is arranged in closed loop magnetic loop working gas gap magnetic field.For reducing the common mode impact, adopt the push-pull type mirror image.Except quartz pendulous reed, other parts or part use in pairs.Quartz pendulous reed upper and lower surface deposition ring electrode is with corresponding up and down magnetic guiding loop end face formation differential capacitor sensor.Torquer coil on the quartz pendulous reed and magnetic guiding loop assembly form torquer.
When applying acceleration, detection mass formation moment of inertia on the quartz pendulous reed assembly, skew " zero-bit " center, the displacement of the responsive skew of differential capacitor sensor, form the function of current be directly proportional with displacement in torquer coil through force feedback loop, produce electromagnetic torque and make the detection quality return to " zero-bit " center.Torque current in the torquer coil has reflected the size and Orientation of acceleration, has realized the output of accelerometer.
Claims (4)
1. electromagnet arrangements of accelerometers, comprise quartz pendulous reed assembly and magnetic guiding loop assembly, the quartz pendulous reed assembly contains quartz pendulous reed and torquer coil block, torquer coil block and magnetic guiding loop assembly use in pairs, the mirror image symmetry is installed in the upper and lower of quartz pendulous reed, it is characterized in that: the magnetic guiding loop assembly contains magnetic guiding loop, permanent magnet radiation ring, ring shielding magnetism and pyromagnetic compensated loop, and the inner chamber of each magnetic guiding loop assembly is from the magnetic guiding loop central shaft successively pyromagnetic compensated loop of coaxial installation, permanent magnet radiation ring and ring shielding magnetism.
2. electromagnet arrangements of accelerometers according to claim 1, it is characterized in that: coaxial mounted permanent magnet radiation ring is the permanent magnet radiation ring of radial magnetizing on magnetic guiding loop lumen centers axle.
3. electromagnet arrangements of accelerometers according to claim 1, it is characterized in that: described two magnetic guiding loop assemblies by the abutment ring laser bonding together, this abutment ring is arranged on the outside of two magnetic guiding loop junctions, namely slot at the periphery of magnetic guiding loop, abutment ring is absorbed in the groove, and two periphery alignment are welded and are fixedly mounted with.
4. electromagnet arrangements of accelerometers according to claim 1, it is characterized in that: described pyromagnetic compensated loop is positioned at the below of permanent magnet radiation ring, and ring shielding magnetism is positioned at the top of permanent magnet radiation ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105387416A CN102998481A (en) | 2012-12-11 | 2012-12-11 | Novel electromagnetic accelerometer structure |
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| CN2012105387416A CN102998481A (en) | 2012-12-11 | 2012-12-11 | Novel electromagnetic accelerometer structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703329A (en) * | 2017-09-29 | 2018-02-16 | 中国船舶重工集团公司第七0七研究所 | Vacuum holding structure for high-resolution quartz flexible accelerometer |
| CN107727884A (en) * | 2017-09-29 | 2018-02-23 | 中国船舶重工集团公司第七0七研究所 | Active magnetic suspension accelerometer |
| CN109085383A (en) * | 2018-09-19 | 2018-12-25 | 中国船舶重工集团公司第七0七研究所 | A kind of novel pendulum-type accelerometer |
| CN109358208A (en) * | 2018-11-14 | 2019-02-19 | 陕西华燕航空仪表有限公司 | A kind of exoskeletal torquer microminiature quartz accelerometer |
| CN112698050A (en) * | 2019-10-23 | 2021-04-23 | 航天科工惯性技术有限公司 | Accelerometer grounding structure |
| US11169175B2 (en) | 2020-02-11 | 2021-11-09 | Honeywell International Inc. | Multilayer excitation ring |
| US11521772B2 (en) | 2020-02-11 | 2022-12-06 | Honeywell International Inc. | Multilayer magnetic circuit assembly |
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| US4250757A (en) * | 1979-11-05 | 1981-02-17 | Sundstrand Data Control, Inc. | Movable element with position sensing means for transducers |
| CN2394233Y (en) * | 1999-10-21 | 2000-08-30 | 西安石油勘探仪器总厂 | Earthquake detector with radial magnetic circuit structure |
| CN1297260A (en) * | 1999-11-22 | 2001-05-30 | 日本电气株式会社 | Second cell and its mfg. method |
| CN200947121Y (en) * | 2005-10-12 | 2007-09-12 | 赵昕 | Radial magnet structure for geophone |
| CN102043068A (en) * | 2010-11-05 | 2011-05-04 | 中国船舶重工集团公司第七○七研究所 | High-resolution accelerometer with on-line adjustable scale factors |
| CN203011945U (en) * | 2012-12-11 | 2013-06-19 | 中国船舶重工集团公司第七0七研究所 | Novel electromagnetic accelerometer structure |
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2012
- 2012-12-11 CN CN2012105387416A patent/CN102998481A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4250757A (en) * | 1979-11-05 | 1981-02-17 | Sundstrand Data Control, Inc. | Movable element with position sensing means for transducers |
| CN2394233Y (en) * | 1999-10-21 | 2000-08-30 | 西安石油勘探仪器总厂 | Earthquake detector with radial magnetic circuit structure |
| CN1297260A (en) * | 1999-11-22 | 2001-05-30 | 日本电气株式会社 | Second cell and its mfg. method |
| CN200947121Y (en) * | 2005-10-12 | 2007-09-12 | 赵昕 | Radial magnet structure for geophone |
| CN102043068A (en) * | 2010-11-05 | 2011-05-04 | 中国船舶重工集团公司第七○七研究所 | High-resolution accelerometer with on-line adjustable scale factors |
| CN203011945U (en) * | 2012-12-11 | 2013-06-19 | 中国船舶重工集团公司第七0七研究所 | Novel electromagnetic accelerometer structure |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703329A (en) * | 2017-09-29 | 2018-02-16 | 中国船舶重工集团公司第七0七研究所 | Vacuum holding structure for high-resolution quartz flexible accelerometer |
| CN107727884A (en) * | 2017-09-29 | 2018-02-23 | 中国船舶重工集团公司第七0七研究所 | Active magnetic suspension accelerometer |
| CN107727884B (en) * | 2017-09-29 | 2019-09-13 | 中国船舶重工集团公司第七0七研究所 | Active magnetic suspension accelerometer |
| CN107703329B (en) * | 2017-09-29 | 2019-11-26 | 中国船舶重工集团公司第七0七研究所 | Vacuum for high-resolution quartz flexible accelerometer keeps structure |
| CN109085383A (en) * | 2018-09-19 | 2018-12-25 | 中国船舶重工集团公司第七0七研究所 | A kind of novel pendulum-type accelerometer |
| CN109358208A (en) * | 2018-11-14 | 2019-02-19 | 陕西华燕航空仪表有限公司 | A kind of exoskeletal torquer microminiature quartz accelerometer |
| CN112698050A (en) * | 2019-10-23 | 2021-04-23 | 航天科工惯性技术有限公司 | Accelerometer grounding structure |
| US11169175B2 (en) | 2020-02-11 | 2021-11-09 | Honeywell International Inc. | Multilayer excitation ring |
| US11521772B2 (en) | 2020-02-11 | 2022-12-06 | Honeywell International Inc. | Multilayer magnetic circuit assembly |
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Application publication date: 20130327 |