CN205533935U - A electric eddy current damping structure for gravity appearance - Google Patents
A electric eddy current damping structure for gravity appearance Download PDFInfo
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- CN205533935U CN205533935U CN201521126342.4U CN201521126342U CN205533935U CN 205533935 U CN205533935 U CN 205533935U CN 201521126342 U CN201521126342 U CN 201521126342U CN 205533935 U CN205533935 U CN 205533935U
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- sampling quality
- quality block
- damping structure
- eddy
- connector
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Abstract
The utility model provides an electric eddy current damping structure for gravity appearance relates to gravity appearance technical field, for the interference killing feature of solving the gravity appearance among the prior art poor. A electric eddy current damping structure for gravity appearance includes the shell to and install in the shell: sampling quality piece, detection spring, electric whirl plate and magnetic circuit device, the sampling quality piece links to each other through filiform connecting piece and shell, the one end that detects the spring links to each other with the shell, and the other end stretches into the cavity of sampling quality piece and links to each other with the sampling quality piece, the bottom of sampling quality piece links to each other with electric whirl plate's top, electricity whirl plate's bottom and tube -shape skeleton all are arranged in the magnetic circuit device. The interference killing feature of electricity eddy current damping structure is strong, and it is high to detect the precision.
Description
Technical field
This utility model relates to gravimeter technical field, especially relates to a kind of eddy-current damping structure for gravimeter.
Background technology
During marine gravitometer work, the change of the external dynamic environment impact on observed result, is the main error source of marine gravitometer measurement.Surveying vessel, when implementing sea gravity measurement, six-freedom degree is likely to produce motion, and then produces disturbance acceleration, and the disturbance acceleration of vertical direction is maximum on the impact of sea gravity measurement among these.This disturbance acceleration numerical value is the 10 of Gravity changer value to be measured5～106Times, and need the acceleration of gravity measured mixed in together, bring the biggest difficulty to sea gravity measurement, and produce the biggest observation error.So the premise measured implemented under the dynamic environment of ocean by marine gravitometer, being exactly to adopt various measures to eliminate surveying vessel in the motion of each degree of freedom, particularly movement in vertical direction to gravimetric impact, sea gravity measurement is produced by weakening dynamic environment change of trying one's best disturbs this maximum error source.
Owing to Vertical disturbing acceleration has periodic feature, and its cycle is little more than acceleration of gravity, so marine gravitometer is general all sampling quality is applied heavy damping, the displacement of the sampling quality caused by Vertical disturbing acceleration is significantly compressed, with digital filtering, remainder is completely eliminated the most again.Marine gravitometer is after heavy damping processes, and the Vertical disturbing acceleration reflection to high frequency is the most blunt, and vertical disturbance can be reduced to 10 to the impact of gravimeter-6, the least, and the A/W change relatively slower to change, frequency is the lowest is very sensitive.Additionally due to the motion amplitude of sampling quality is significantly compressed, substantially reduce the nonlinearity erron that frame for movement, capacitance sensor and distance of zero mark detection spring technology are improved not and produced；Also eliminate the high order effect of normal acceleration simultaneously.Therefore, advanced damping is the important guarantee that marine gravitometer can implement high-precision rapid survey under complicated ocean dynamic environment.
Have in a kind of gravimeter application is air damper, and this instrument have employed oblique pull oscillating rod type elastic system, and the coefficient of impact is little, it is not necessary to excessive damped coefficient can meet kinetic measurement requirement.Fork is in the middle of a pair air damper, can all provide damping in vertical and horizontal direction.When being affected by external vertical disturbance acceleration, piston up-down compressed air in fork band fluctuation dampers, thus produce bigger damping by the amplitude compression of Vertical disturbing acceleration to scope of design.But air damper has a lot of limitation, big damped coefficient cannot be obtained, limited to the attenuation amplitude of vertical disturbance, and due to the compressibility of air, when the vibration period of the system of measurement is shorter, the work of air damper just looks like an additional detection spring, does not the most hinder the effect of vertical direction piston movement, the most also can strengthen the motion of this vertical piston, cause bigger agitation error.
Utility model content
The purpose of this utility model is to provide a kind of eddy-current damping structure for gravimeter, to solve the poor anti jamming capability of gravimeter of the prior art.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
The eddy-current damping structure for gravimeter that this utility model provides, including shell, and is installed in described shell:
Having the sampling quality block of cavity, described sampling quality block is connected with described shell by thread connector；
Detection spring, one end of described detection spring is connected with described shell, and the other end stretches into the cavity of described sampling quality block and is connected with described sampling quality block；
Current vortex plate, the bottom of described sampling quality block is connected with the top of described current vortex plate；
Magnetic circuit device, bottom and the tubular skeleton of described current vortex plate are respectively positioned in described magnetic circuit device.
Preferably, the outer surface of described sampling quality block is coated with magnetic masking layer.
Preferably, described sampling quality block is tubulose mass.
Preferably, the quantity of described thread connector is multiple, and multiple described thread connectors are divided into many groups, and often each described thread connector in group is respectively positioned on same plane, and the thread connector of each group is distributed along the axially spaced-apart of described sampling quality block.
Preferably, described thread connector has two groups, and often group includes three described thread connectors, and often the described thread connector of three in group is uniformly distributed along the circumference of described sampling quality block respectively.
Preferably, described sampling quality block is provided with a pair for the torsion spring offsetting pulling force, described torsion spring is between connector thread described in two groups and equal with the distance between thread connector described in two groups.
Preferably, the two ends of described thread connector are fixed by the clamping device being packed on described sampling quality block and described housing respectively, and described clamping device includes a pair sheet metal being screwed together.
Preferably, described detection spring is connected with described sampling quality block by column connector, described column connector is arranged at the cavity bottom of described sampling quality block, the external cylindrical surface of described column connector is fixing with the inwall of the cavity of described sampling quality to be connected, and described detection spring is connected with the upper end of described column connector.
Preferably, the bottom of described column connector is stretched into described current vortex plate and is provided with flange, and described column connector is connected together with described current vortex plate by described flange.
Preferably, described shell is cylindrical shell, and the stable axle of the vertical direction of described cylindrical shell, described sampling quality block, described current vortex plate and described magnetic circuit device is on same straight line.
Relative to prior art, the eddy-current damping structure for gravimeter described in the utility model has the advantage that
In the eddy-current damping structure that this utility model provides, owing to sampling quality block is connected with housing by thread connector, therefore sampling quality block can not opposite shell move in the horizontal direction, opposite shell can only produce the motion vertically gone up.Owing to the bottom of sampling quality block is connected with the top of current vortex plate, therefore sampling quality block can drive current vortex plate closer or far from magnetic circuit device.In use, when sampling quality block is disturbed by Vertical disturbing acceleration, sampling quality block drives current vortex plate to move to the direction closer or far from magnetic circuit device, that is, current vortex plate moves up and down in the magnetic field that magnetic circuit device produces, so that the magnetic flux of current vortex intralaminar part changes, forms powerful current vortex in current vortex plate, then produce a reverse Lorentz force, then produce damping and hinder the motion of sampling quality block.And the current vortex that current vortex plate produces eventually is converted into Joule heat and discharges.
The eddy-current damping structure provided due to this utility model is to utilize conductor (current vortex plate) to move in magnetic field to produce the ultimate principle of eddy current effect, insensitive to environmental temperature fluctuation relative to fluid damping, time constant is little, Gravity changer is delayed little, the most there is not the impact of fluid convection power, the eddy-current damping structure that this utility model provides has that damped coefficient is big, noncontact, mechanical friction and wear, need not lubricate, easy to maintenance, high reliability.When the eddy-current damping structure provided by this utility model is applied to marine gravitometer, relative to marine gravitometer of the prior art, the marine gravitometer low frequency this to wave of eddy-current damping structure, amplitude vertical disturbance that application this utility model provides have more preferable compression effectiveness, the precision of gravimeter can be improved greatly, meet sea gravity measurement the most on a large scale.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the eddy-current damping structure that Fig. 1 provides for this utility model embodiment；
Fig. 2 is the sectional view in Fig. 1 at A-A.
Reference:
1-sampling quality block；2-current vortex plate；The thread connector of 3-；
4-detects spring；5-magnetic circuit device；51-outer magnetizer；
Magnetic conductor in 52-；53-rare-earth permanent magnet；6-column connector；
7-tubular skeleton.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
In description of the present utility model, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be for only for ease of description this utility model and simplifying and describe; rather than instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood with concrete condition.
The structural representation of the eddy-current damping structure that Fig. 1 provides for this utility model embodiment, Fig. 2 is the sectional view in Fig. 1 at A-A, as depicted in figs. 1 and 2, the eddy-current damping structure for gravimeter that this utility model embodiment provides, including shell, and be installed in shell: having the sampling quality block 1 of cavity, sampling quality block 1 is connected with shell by thread connector 3；Detection spring 4, one end of detection spring 4 is connected with shell, and the other end stretches into the cavity of sampling quality block 1 and is connected with sampling quality block 1；Current vortex plate 2, the bottom of sampling quality block 1 is connected with the top of current vortex plate 2；Magnetic circuit device 5, bottom and the tubular skeleton 7 of current vortex plate 2 are respectively positioned in magnetic circuit device 5.
In the eddy-current damping structure that this utility model embodiment provides, owing to sampling quality block 1 is connected with housing by thread connector 3, therefore sampling quality block 1 can not opposite shell move in the horizontal direction, opposite shell can only produce the motion vertically gone up.Owing to the bottom of sampling quality block 1 is connected with the top of current vortex plate 2, therefore sampling quality block 1 can drive current vortex plate 2 closer or far from magnetic circuit device 5.In use, when sampling quality block 1 is disturbed by Vertical disturbing acceleration, sampling quality block 1 drives current vortex plate 2 to move to the direction closer or far from magnetic circuit device 5, that is, current vortex plate 2 moves up and down in the magnetic field that magnetic circuit device 5 produces, so that the magnetic flux within current vortex plate 2 changes, forms powerful current vortex in current vortex plate 2, then produce a reverse Lorentz force, then produce damping and hinder sampling quality block 1 to move.And the current vortex that current vortex plate 2 produces eventually is converted into Joule heat and discharges.
The eddy-current damping structure provided due to this utility model embodiment is to utilize conductor (current vortex plate 2) to move in magnetic field to produce the ultimate principle of eddy current effect, insensitive to environmental temperature fluctuation relative to fluid damping, time constant is little, Gravity changer is delayed little, the most there is not the impact of fluid convection power, the eddy-current damping structure that this utility model provides has that damped coefficient is big, noncontact, mechanical friction and wear, need not lubricate, easy to maintenance, high reliability.When the eddy-current damping structure provided by this utility model is applied to marine gravitometer, relative to marine gravitometer of the prior art, the marine gravitometer low frequency this to wave of eddy-current damping structure, amplitude vertical disturbance that application this utility model embodiment provides have more preferable compression effectiveness, the precision of gravimeter can be improved greatly, meet sea gravity measurement the most on a large scale.
Magnetic circuit device 5 includes outer magnetizer 51, interior magnetic conductor 52 and rare-earth permanent magnet body 54, it is provided with containing cavity inside described outer magnetizer, described current vortex plate 2, tubular skeleton 7 and magnet mounting cylinder are placed in described containing cavity, described interior magnetic conductor is installed in described magnet mounting cylinder, and described rare-earth permanent magnet body 54 two ends are connected with interior magnetic conductor and containing cavity respectively.
In the present embodiment, magnetic circuit device 5 depends on high stability uniform magnetic field as the main executive component of electromagnetic damping, the generation of accurate, stable electromagnetic force.The air-gap field of system is produced by rare-earth permanent magnet body 54, and its characteristic arranges closely related with stability etc. with the performance of permanent magnet material, magnetic structure with parameter, magnet steel operating point.Rare-earth permanent magnet body 54 is low owing to having the highest coercivity, the highest magnetic energy product, demagnetizing curve flex point, meets the requirement of magnetic Circuit Design.Dilute ten bore the intermetallic compound that permanent magnet material is made up of different rare earth elements and cobalt.Rare earth element refers mainly to the periodic table of chemical element Atom ordinal number 15 kinds of elements from 57 to 7l.They and transition metal (such as Fe, Co, Ni etc.) can form compound between various metals, XCo (X represents rare earth element) the type compound that wherein rare earth metal and cobalt are formed has the highest crystalline anisotropy and saturation magnetization, and there is the highest curie point, the permanent magnet material of excellent performance can be made.
In the one of which detailed description of the invention of this utility model embodiment, shell is cylindrical shell, and the stable axle of the vertical direction of cylindrical shell, sampling quality block 1, current vortex plate 2 and magnetic circuit device 5 is on same straight line.Current vortex plate 2 can be made up of titanium alloy, aluminum or silver, preferably titanium alloy；Sampling quality block 1 can be made up of almag or titanium alloy, preferably titanium alloy, and owing to titanium alloy has the highest intensity, therefore the later stage Stress Release of the sampling quality block 1 that employing titanium alloy material is made is little, is not susceptible to deformation, and stability is stronger.It is 0.1mm magnetic masking layer that the fast outer surface of sampling quality is coated with thickness, and the effect of magnetic masking layer is that the magnetic line of force avoiding magnetic circuit device 5 rises into the sensitivity of faradic current impact detection spring 4 at detection spring 4.
In the present embodiment, for the ease of installing thread connector 3, sampling quality block 1 is tubular structure, the quantity of thread connector 3 is multiple, multiple thread connectors 3 are divided into many groups, often each thread connector 3 in group is respectively positioned on same plane, and the thread connector 3 of each group is distributed along the axially spaced-apart of sampling quality block 1.
When the quantity of thread connector 3 is six, thread connector 3 is equally divided into two groups, is separately mounted to upper area and the lower area of the sampling quality block 1 of tubulose, and often the thread connector 3 of three in group is uniformly distributed along the circumference of sampling quality block 1 respectively.Specifically, often the thread connector 3 of three in group is respectively along outer surface tangentially mounted of sampling quality block 1, and on the horizontal plane residing for three thread connectors 3 with group, the cross section of sampling quality block 1 is circular, in this circle, the diameter at the end points place that any one thread connector 3 is connected with sampling quality block 1, the angle between the diameter at the end points place being connected with sampling quality block 1 with another adjacent thread connector 3 is 120 degree.Simultaneously, in order to offset six thread connectors 3 pulling force to sampling quality block 1, on sampling quality block 1, the equidistant place of the thread connector 3 of distance two groups is provided with a pair torsion spring, two torsion springs are all along the tangentially mounted of the outer surface of sampling quality block 1 and be in same level, on the horizontal plane at two torsion spring places, the cross section of sampling quality block 1 is circular, and the center of circle of this circle is the point of symmetry of two torsion springs.
Certainly, the quantity of above-mentioned thread connector 3 is not limited to six, can also be other quantity, such as five, when the quantity of thread connector 3 is five, thread connector 3 is divided into three groups, the quantity having the thread connector 3 in two groups is two, the quantity of the thread connector 3 in another group is one, three groups of thread connectors 3 are respectively arranged in the upper area of sampling quality block 1, central region and lower area, wherein, the thread connector 3 of upper area and lower area is two, the thread connector 3 of central region is one, five thread connectors 3 are all along outer surface tangentially mounted of sampling quality block 1.The thread connector 3 that will be located in central region projects in the plane at superposed thread connector 3 place, and when the quantity of the installation site of three thread connectors 3 and above-mentioned thread connector 3 is six, the installation site often organizing interior three thread connectors 3 is identical.Upper area is identical with the setting angle of the thread connector 3 in lower area.In order to offset five thread connectors 3 pulling force to sampling quality block 1, on sampling quality block 1, the thread connector 3 place Plane Installation in central region has a pair torsion spring, two torsion springs are all along the tangentially mounted of the outer surface of sampling quality block 1 and be in same level, and the setting angle of two torsion springs is identical with the setting angle of the thread connector 3 in upper area (lower area).
In order to avoid thread connector 3 is bent over, and reduce the Stress Release of thread connector 3, the two ends of thread connector 3 are fixed by the clamping device being packed on sampling quality block 1 and housing respectively, clamping device includes a pair sheet metal being screwed together, owing to all thread connectors 3 use same way to be connected with sampling quality block 1/ housing, therefore as a example by one of them thread connector 3, the connected mode between thread connector 3 and sampling quality block 1 is illustrated below: be correspondingly arranged on two sheet metals in one end of thread connector 3, thread connector 3 is clamped by two sheet metals, two sheet metals are fastened by bolts, thus step up thread connector 3, and two sheet metals are connected with sampling quality block 1 by bolt, thus one end of thread connector 3 is connected with sampling quality block 1.Above-mentioned sheet metal can be stainless steel metal sheet.
In the present embodiment, detection spring 4 is connected with sampling quality block 1 by column connector 6, column connector 6 is arranged at the cavity bottom of sampling quality block 1, and the external cylindrical surface of column connector 6 is fixing with the inwall of the cavity of sampling quality to be connected, and detection spring 4 is connected with the upper end of column connector 6.The bottom of column connector 6 is stretched into current vortex plate 2 and is provided with flange, and column connector 6 is connected together with current vortex plate 2 by flange.
It should be noted that the electromagnetic damper that this utility model embodiment provides can be applied not only to, in marine gravitometer, apply also for airborne gravitormeter.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of this utility model each embodiment technical scheme.
Claims (10)
1. the eddy-current damping structure for gravimeter, it is characterised in that include shell,
And be installed in described shell:
Having the sampling quality block of cavity, described sampling quality block passes through thread connector and institute
State shell to be connected；
Detection spring, one end of described detection spring is connected with described shell, and the other end stretches into
The cavity of described sampling quality block and being connected with described sampling quality block；
Current vortex plate, the top phase of the bottom of described sampling quality block and described current vortex plate
Even；
Magnetic circuit device, bottom and the described tubular skeleton of described current vortex plate are respectively positioned on described magnetic
In the device of road.
Eddy-current damping structure for gravimeter the most according to claim 1, it is special
Levying and be, the outer surface of described sampling quality block is coated with magnetic masking layer.
Eddy-current damping structure for gravimeter the most according to claim 1, it is special
Levying and be, described sampling quality block is tubulose mass.
Eddy-current damping structure for gravimeter the most according to claim 3, it is special
Levying and be, the quantity of described thread connector is multiple, and multiple described thread connectors are divided into
Many groups, often each described thread connector in group is respectively positioned on same plane, the thread connection of each group
Part is distributed along the axially spaced-apart of described sampling quality block.
Eddy-current damping structure for gravimeter the most according to claim 4, it is special
Levying and be, described thread connector has two groups, and often group includes three described thread connectors,
Often the described thread connector of three in group uniformly divides along the circumference of described sampling quality block respectively
Cloth.
Eddy-current damping structure for gravimeter the most according to claim 5, it is special
Levy and be, described sampling quality block is provided with a pair for the torsion spring offsetting pulling force,
Described torsion spring between connector thread described in two groups, and with thread company described in two groups
Distance between fitting is equal.
Eddy-current damping structure for gravimeter the most according to claim 4, it is special
Levy and be, the two ends of described thread connector respectively by be packed in described sampling quality block and
Clamping device on described housing is fixed, and described clamping device includes being screwed together
A pair sheet metal.
Eddy-current damping structure for gravimeter the most according to claim 4, it is special
Levying and be, described detection spring is connected with described sampling quality block by column connector, institute
State column connector and be arranged at the cavity bottom of described sampling quality block, described column connector
The inwall of external cylindrical surface and the cavity of described sampling quality fixing be connected, described detection spring
It is connected with the upper end of described column connector.
Eddy-current damping structure for gravimeter the most according to claim 8, it is special
Levying and be, the bottom of described column connector is stretched into described current vortex plate and is provided with flange,
Described column connector is connected together with described current vortex plate by described flange.
Eddy-current damping structure for gravimeter the most according to claim 1, its
Being characterised by, described shell is cylindrical shell, described cylindrical shell, described sampling matter
The stable axle of the vertical direction of gauge block, described current vortex plate and described magnetic circuit device is at same
On straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521126342.4U CN205533935U (en) | 2015-12-29 | 2015-12-29 | A electric eddy current damping structure for gravity appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521126342.4U CN205533935U (en) | 2015-12-29 | 2015-12-29 | A electric eddy current damping structure for gravity appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205533935U true CN205533935U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521126342.4U Expired - Fee Related CN205533935U (en) | 2015-12-29 | 2015-12-29 | A electric eddy current damping structure for gravity appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205533935U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402299A (en) * | 2015-12-29 | 2016-03-16 | 中国科学院测量与地球物理研究所 | Eddy current damping structure for gravity meters |
| CN106405669A (en) * | 2016-11-15 | 2017-02-15 | 中国科学院测量与地球物理研究所 | Zero-length spring, connecting structure of zero-length spring and dynamic gravity meter |
-
2015
- 2015-12-29 CN CN201521126342.4U patent/CN205533935U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402299A (en) * | 2015-12-29 | 2016-03-16 | 中国科学院测量与地球物理研究所 | Eddy current damping structure for gravity meters |
| CN105402299B (en) * | 2015-12-29 | 2018-01-02 | 中国科学院测量与地球物理研究所 | A kind of eddy-current damping structure for gravimeter |
| CN106405669A (en) * | 2016-11-15 | 2017-02-15 | 中国科学院测量与地球物理研究所 | Zero-length spring, connecting structure of zero-length spring and dynamic gravity meter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20171229 |