CN210198637U - Suspension calibration device for weak force test - Google Patents
Suspension calibration device for weak force test Download PDFInfo
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- CN210198637U CN210198637U CN201920886848.7U CN201920886848U CN210198637U CN 210198637 U CN210198637 U CN 210198637U CN 201920886848 U CN201920886848 U CN 201920886848U CN 210198637 U CN210198637 U CN 210198637U
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Abstract
The utility model relates to a weak force test technical field, concretely relates to hang calibration device for weak force test. The calibration device comprises: the device comprises a mounting frame, a table body, a micro-thruster, a micrometer, a first calibration component and a second calibration component. The utility model discloses a calibration device adopts first calibration assembly, through hanging the calibration ball of known quality under micro-nano translation platform, the calibration ball supports the demarcation terminal surface that leans on the stage body under micro-nano translation platform's drive, and the suspension wire pulling force is just for demarcating the input at the component of horizontal direction, under the condition of guaranteeing measuring accuracy, has simplified the structure, uses the utility model discloses a calibration device carries out the easy operation of demarcation.
Description
Technical Field
The utility model relates to a weak force test technical field, concretely relates to hang calibration device for weak force test.
Background
The micro-thruster with the resolution ratio of micro Newton magnitude and higher precision has important application in high-precision space experiments. In space tasks such as high-precision deep space exploration, space satellite formation flight and the like, the precision requirements on attitude control and orbit control of a satellite are higher and higher, a controlled actuator is a high-precision space micro-thruster which is an extremely important component of the space tasks, and the performance of the controlled actuator also determines the execution quality of the space tasks and even the success or failure of the space tasks. In addition, in the projects such as the space gravitational wave exploration plan, the satellite gravitational field measurement, the space equivalence principle inspection, and the space microgravity vibration isolation, it is also necessary to perform so-called drag-free control by compensating non-gravitational disturbance on the satellite or the local load in real time by using a micro-thruster.
The ground performance evaluation test and the precision calibration are the necessary way for the development of the micro-thruster and are one of the preconditions for the space application of the micro-thruster.
In order to realize precise micro-thrust test and calibration of submicron Newton level on the ground, research teams of a plurality of countries propose different test schemes. (Meas.Sci.Technol.17,2006, 711; IEPC-2009-. The basic principle of the test scheme of the French team and the test scheme of the German team are that a single pendulum scheme with balancing mass is adopted, the single pendulum scheme uses an accelerometer to measure ground vibration and deducts corresponding errors in data processing, and the single pendulum scheme uses two nominally identical pendulums to carry out displacement difference measurement.
The accurate calibration micro-thrust test bench is the premise of testing the micro-thruster. For the micro-thrust test scheme, a French team uses a series of moments generated by masses away from the vertical axis of the pendulum body to calibrate the test bench, and the relative calibration error of the scheme is about 0.5 percent (IEPC-2013-418) because the masses in a specific range must be selected and limited by the error of the calibrated mass of the balance; the German team calibrates the test bench with the electrostatic force of a special electrostatic comb with complicated calibration and installation, and the relative calibration error is about 0.3% (IEPC-2013-. The calibration method is complex in operation, and the calibration precision needs to be further improved.
In view of the above, it is an urgent technical problem in the art to provide a new suspension calibration device for weak force testing to overcome the above deficiencies in the prior art. The utility model provides a relative demarcation scheme of calibrating that the precision is high and the operation is convenient to overcome prior art's the aforesaid not enough.
Disclosure of Invention
An object of the utility model is to provide a hang calibration device and calibration method for weak force test to the above-mentioned not enough of prior art.
The purpose of the utility model can be realized by the following technical measures:
the utility model provides a hang calibration device for weak force test, calibration device includes:
a mounting frame;
the table body is arranged on the mounting frame, the table body is provided with a first accommodating cavity extending in the axial direction and a second accommodating cavity extending in the radial direction, and a first end face and a second end face which are parallel to the cross section of the table body and opposite to each other are formed on the side wall of the second accommodating cavity;
the micro propeller is arranged in the first accommodating cavity;
the at least two wire drawing constraint components are arranged between the table body and the mounting frame and are used for constraining the degree of freedom of the table body;
the first calibration assembly is used for generating weak force and comprises a micro-nano translation table, a suspension wire and a calibration ball, wherein the micro-nano translation table is arranged on the mounting frame and can move along the horizontal direction, one end of the suspension wire is arranged on the micro-nano translation table, the calibration ball is arranged at the other end of the suspension wire, and the calibration ball is suspended in the second accommodating cavity and is positioned at the corresponding position of the first end face and the second end face; and
and the micrometer is arranged on the table body.
Preferably, the calibration apparatus further includes:
and the second calibration assembly for generating weak force comprises a conductor component arranged at one end of the table body far away from the micro-thruster and a magnetic component for generating a magnetic field.
Preferably, a fixing portion is formed at one end of the stage body, which is far away from the micro-thruster, the conductor component is a coil wound on the fixing portion, the magnetic component is an annular permanent magnet, and the coil is located in a magnetic field of the magnetic component.
Preferably, the first accommodating cavity and the second accommodating cavity are not communicated with each other, the first accommodating cavity extends from the first end of the table body, the second accommodating cavity is arranged close to the second end of the table body, and the second calibration assembly is arranged at the second end of the table body.
Preferably, each wire drawing restraint assembly comprises a force application adjusting part and at least three first wire drawing parts, wherein the force application adjusting part is used for applying tension to the table body and loading tension to the first wire drawing parts, one end of each first wire drawing part is arranged on the installation frame, the other end of each first wire drawing part is arranged on the outer surface of the table body, and the at least three wire drawing parts are arranged in the circumferential direction of the table body at equal intervals and in a radial mode.
Preferably, the force application adjusting part comprises a second drawn wire, a fixed pulley and a force application mechanism, one end of the second drawn wire is arranged on the platform body, and the other end of the second drawn wire is connected with the force application mechanism through the fixed pulley.
Preferably, the force application adjusting piece comprises a second wire and an elastic piece arranged on the second wire.
The utility model discloses a calibration device adopts first calibration assembly, through hanging the calibration ball of known quality under micro-nano translation platform, the calibration ball supports the demarcation terminal surface that leans on the stage body under micro-nano translation platform's drive, and the suspension wire pulling force is just for demarcating the input at the component of horizontal direction, under the condition of guaranteeing measuring accuracy, has simplified the structure, uses the utility model discloses a calibration device carries out the easy operation of demarcation.
Drawings
Fig. 1 is a schematic structural diagram of a suspension calibration device for weak force testing according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a weak force exerted by a first calibration assembly in a suspension calibration device for weak force testing according to an embodiment of the present invention.
Fig. 3 is a side view of a wire drawing restraining assembly in a suspension calibration device for weak force testing according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a wire drawing restraining assembly in the suspension calibration device for weak force testing according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following, many aspects of the present invention will be better understood with reference to the drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, in the several views of the drawings, like reference numerals designate corresponding parts.
The word "exemplary" or "illustrative" as used herein means serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments provided to enable persons skilled in the art to make and use the examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other instances, well-known features and methods have been described in detail so as not to obscure the invention. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
An embodiment of the utility model provides a hang calibration device for weak force test, please refer to and show in fig. 1, calibration device includes: the device comprises an installation frame 10, a table body 20, a micro thruster 30, two wire drawing constraint components 40, a micrometer 50, a first calibration component 60 and a second calibration component 70, wherein the table body 20 is arranged on the installation frame 10 through the two wire drawing constraint components 40, in the embodiment, the table body 20 is transversely arranged, the two wire drawing constraint components 40 are respectively arranged at the left end and the right end of the table body 20, the two wire drawing constraint components 40 limit the translational motion and the rotational freedom of the table body 20 in the directions of a y axis and a z axis, and the table body 20 can be translated or rotated in the direction of an x axis (horizontal direction).
In the present embodiment, although the preferred embodiment in which the table body 20 is provided to the mounting frame 10 by the wire drawing restraining member 40 is described as an example, the connection manner between the table body 20 and the mounting frame 10 is not limited thereto, and may be any other manner.
Wherein the mounting frame 10 may be a gas tight system with vacuum maintaining capability for simulating and testing the working condition of the components under vacuum.
Wherein, the stage body 20 is cylindric, and the stage body 20 includes relative first end 20a and the second end 20b that sets up, and the stage body 20 has been seted up first and has been held chamber 201 and second and hold chamber 202, and wherein, first chamber 201 axial extension, the radial extension of second chamber 202 that holds, and first chamber 201 and the second chamber 202 that holds do not communicate with each other, and first chamber 201 that holds begins to extend from the first end 20a of stage body 20, and the second chamber 202 that holds is close to the second end 20b setting of stage body 20, and little propeller 30 holds in first chamber 201 that holds, and when little propeller 30 acted on, impel this stage body 20 and move from first end 20a to second end 20b in the horizontal direction (x axle direction). In addition, a first end surface 2021 and a second end surface 2022, which are parallel to the cross section of the stage body 20 and are opposite to each other, are formed on the side wall of the second accommodating chamber 202, wherein the first end surface 2021 is relatively close to the micro-thruster 30, and the second end surface 2022 is relatively far away from the micro-thruster 30.
The first calibration assembly 60 is used for generating a standard weak force and comprises a micro-nano translation stage 601, a suspension wire 602 and a calibration ball 603, wherein the micro-nano translation stage 601 is arranged on the mounting frame 10, and can move along the horizontal direction, the upper end of the suspension wire 602 is arranged on the micro-nano translation stage 601, the calibration ball 603 is arranged at the lower end of the suspension wire 602, the calibration ball 603 is suspended in the second accommodating cavity 202, and is located at the corresponding position of the first end surface 2021 and the second end surface 2022, where the first end surface 2021 and the second end surface 2022 are both calibration end surfaces of the first calibration assembly 60, please refer to fig. 2, it is assumed that the direction from the second end 20b to the first end 20a of the stage 20 is the first direction, and the direction from the first end 20a to the second end 20b of the stage 20 is the second direction, when the micro-nano translation stage 601 moves in the first direction, the calibration ball 603 abuts against the first end surface 20a, and the component force of the pulling force of the suspension wire 602 in the horizontal direction is the standard weak force of the first direction applied to the stage body 20 by the first calibration assembly 60.
Wherein m iscTo calibrate the mass of the ball, LcLength of the suspension wire, g0Is acceleration of gravity, Δ xcThe moving distance of the micro-nano translation table in the horizontal direction is obtained; when the micro-nano translation stage 601 moves in the second direction, the calibration ball 603 abuts against the second end surface 20b, and the component force of the pulling force of the suspension wire 602 in the horizontal direction is the standard weak force F in the second direction applied to the stage body 20 by the first calibration assembly 60.
The second calibration assembly 70 is an electromagnetic actuator for generating a normal weak force, and includes a conductor member 701 and a magnetic member 702, the conductor member 701 is disposed at the second end 20b of the stage body 20, the magnetic member 702 is for generating a magnetic field, specifically, the second end 20b of the stage body 20 is formed with a fixing portion 203, the conductor member 701 is a coil wound on the fixing portion 203, the magnetic member 702 is a ring-shaped permanent magnet, the coil 701 is located in the magnetic field of the magnetic member 702, and when a current passes through the coil 701, a magnetic force acting on the stage body 20 in a first direction is generated as a normal weak force F' ═ BL by the principle that an ampere force is applied to the magnetic field of the magnetic member 702BΔ I, where B is the magnetic field strength of the magnetic member 702, LBΔ I is the effective length of the conductive member 701 in the magnetic field1, current of 1.
Wherein, the micrometer 50 is arranged on the table body 20 and is used for detecting the displacement of the table body 20 in the horizontal direction (x-axis direction); preferably, the micrometer 50 is disposed at the second end 20b of the table body 20.
The first calibration component 60 and the second calibration component 70 can be calibrated independently, and are described in detail below.
When the first calibration assembly 60 is used for calibration, when the micro-nano translation table 601 moves in the first direction, the calibration ball 603 abuts against the first end surface 20a, and the component force of the tension of the suspension wire 602 in the horizontal direction is the first standard weak force of the first calibration assembly 60 applied to the table body 20 in the first direction
The micro-thruster 30 applies a first thrust N in a second direction to the stage body 201First normal weak force F and first thrust force N1When the stage body 20 is in the balanced state, the displacement of the stage body 20 in the horizontal direction is 0, the stage body 20 can be adjusted to be in the balanced state by the micrometer 50, and at the moment, the first standard weak force F is generated1With a first thrust N1Are of equal size, i.e.
Micro-thrust test output value delta V is N1SFWherein S isFIs the first calibration factor and, therefore,
wherein, the delta V is the output of micro-thrust test, namely the output of the micro-thrust test bench consisting of the bench body and the micro-thruster, mcTo calibrate the mass of the ball, LcLength of the suspension wire, g0Is acceleration of gravity, Δ xcFurther, when the friction coefficient β between the calibration ball and the calibration end face is considered, the calibration coefficient is
Therefore, it is usually caused by frictionCalibration errors due to rubbing are negligible.
When the calibration is performed by the second calibration assembly 70, when a current passes through the coil 701, the magnetic force acting on the stage body 20 in the first direction is generated as the second standard weak force F' BL by the principle of receiving an ampere force in the magnetic field of the magnetic member 702BΔ I, the micro-thruster 30 applies a second thrust N in a second direction to the table body 202Second normal weak force F' and second thrust force N2When the stage body 20 is in the balanced state, the displacement of the stage body 20 in the horizontal direction is 0, the stage body 20 can be adjusted to be in the balanced state by the micrometer 50, and at the moment, the second standard weak force F' and the second thrust N2Are equal in size, i.e. N2＝F′＝BLBΔ I, micro thrust test output value Δ V ═ N2S′FWherein, S'FIs the second calibration factor and, therefore,
wherein, DeltaV is micro-thrust test output, namely closed-loop measurement output of a micro-thrust test bench consisting of the bench body and the micro-thruster, B is the magnetic field intensity of the magnetic component, and L isBΔ I is the current of the conductive member for the effective length of the conductive member within the magnetic field.
Specifically, referring to fig. 3 and 4, each of the drawing wire restraining assemblies 40 includes a force applying adjusting member 401 and at least three first drawing wires 402, the force applying adjusting member 401 is configured to apply a pulling force to the platform 20 and load a tension on the plurality of first drawing wires 402, one end of each of the first drawing wires 402 is disposed on the mounting frame 10, the other end of each of the first drawing wires 402 is disposed on the outer surface of the platform 20, and the plurality of first drawing wires 402 are radially disposed at equal intervals in the circumferential direction of the platform 20. Preferably, the fixing points of the at least three first drawn wires 402 on the table body 20 are located on the same circumference, the fixing points of the at least three first drawn wires 402 on the mounting frame 10 are located on the same circumference, and the lengths of the at least three first drawn wires 402 are equal.
In a preferred embodiment, the table body 20 has a cylindrical shape, the cross section of the table body 20 has a circular shape, and the first wire 402 is tangent to the circular cross section of the table body 20. Further, the number of the first drawn wires 402 is 3, an included angle between two adjacent first drawn wires 402 is 60 °, please refer to fig. 3 and 4, wherein one of the first drawn wires 402 is vertically disposed, and the force application adjusting member 401 and the vertically disposed first drawn wire 402 are symmetrically disposed on the table body 20.
Specifically, in a first preferred embodiment, please refer to fig. 3, the force application adjusting member 401 includes a second wire 4011, a fixed pulley 4013 and a force application mechanism 4012, one end of the second wire 4011 is disposed on the table body 20, the other end of the second wire 4011 is connected to the force application mechanism 4012 through the fixed pulley 4013, the fixed pulley 4013 is fixed on the mounting frame 10, the second wire 4011 is tangent to the circular cross section of the table body 20, and the second wire 4011 and the three first wires 402 are coplanar. Preferably, the force application mechanism 4012 is a weight.
During the installation of the table body 20, in order to maintain the table body 20 in the configuration shown in the figure, the first wire 402 needs to be preloaded with proper tension, which can be realized by the second wire 4011 with tension T1 and the second wire 4011 with tension T2 bypassing the fixed pulley 4013 fixed on the installation frame 10 and applying proper force by the force application mechanism 4012, and when the force application mechanism 4012 is a weight, by hanging a weight with proper weight.
When the table body 20 is installed, the first wire 402 and the second wire 4011 are kept under tension and have the same length as each other, wherein the length of the first wire 402 is unchanged, and the length of the second wire 4011 is adjustable, so that eight wires of equal length are connected from the mounting frame 10 to the edge of the table body 20 to restrain the unrelated movement of the table body 20, specifically, three first wires 402 with tensions of F1, F2 and F3 are connected from the mounting frame 10 to the first end 20a of the table body 20 tangentially to each other at 60 °, the second wire 4011 with tension of T1 acts on one side of the table body 20 symmetrically to the first wire 402 with tension of F1, and four wires with tensions of F1, F2, F3 and T1 are taken as a group, coplanar and perpendicular to the axis of the table body 20, but the torque acting on the table body 20 is in the opposite direction; four drawing wires with pulling forces F4, F5, F6 and T2, respectively, as another group, are connected from the mounting frame 10 to the second end 20b of the table body 20 in the same manner.
When the tension of all eight drawn wires is kept, the translation of the table body 20 along the horizontal direction (the axial direction of the table body 20) is a flexible degree of freedom, and the qualitative analysis is as follows: referring to fig. 4, when a slight pushing force acts on the table 20 in the x direction, i.e. the direction perpendicular to the drawing plane, the connection point of the two sets of wires on one side of the table 20 is away from the original plane, because 6 wires (the first wire 402) are not extendable, the table 20 slightly rotates in the x-axis direction, and the other two wires (the second wire 4011) maintain the tension of the entire elastic structure of the wire constraint assembly 40 (approximately) by the slight rotation of the fixed pulley 4013. The remaining four degrees of freedom (y-axis and z-axis translation and rotation) of the stage 20 are directly constrained by the tension of the 8 wires. It can be seen that in this embodiment, the stage 20 is constrained by 8 wires, creating a sensitive direction along the x-axis (horizontal direction) suitable for microthrust testing.
Further, in the first preferred embodiment, the second wire 4011 may further include a first elastic member 4014, and the first elastic member 4014 cooperates with the force applying mechanism 4012 to perform fine adjustment (elongation of the first elastic member 4014 and fine rotation of the fixed pulley 4013) when the table 20 slightly rotates due to loading of the tensions of the three first wires 402 and the action of the micro-thrust force on the table 20 in the x direction, so as to maintain the tension of the entire elastic structure of the wire constraint assembly 40 approximately constant. Further, the first elastic member 4014 is a spring.
Specifically, in a second preferred embodiment, please refer to fig. 4, an elastic member is directly disposed on the force application adjusting member 401 as a force application mechanism, the force application adjusting member 401 includes a second drawing wire 4011 and a second elastic member 4015 disposed on the second drawing wire 4011, one end of the second drawing wire 4011 is disposed on the table 20, the other end of the second drawing wire 4011 is disposed on the mounting frame 10, the second drawing wire 4011 is tangent to the circular cross section of the table 20, and the second drawing wire 4011 and the three first drawing wires 402 are disposed in a coplanar manner.
During the installation of the table body 20, the second drawing wire 4011 with the tension of T1 and the second drawing wire 4011 with the tension of T2 are pre-loaded with proper tension for the first drawing wire 402 by the extension of the second elastic part 4015.
When the table body 20 is installed, the first wire 402 and the second wire 4011 both maintain tension and have the same length as each other, wherein the length of the first wire 402 is unchanged, the length of the second wire 4011 is adjusted by the length change of the second elastic member 4015, and when the table body 20 slightly rotates due to the action of micro-thrust on the x direction of the table body 20, the tension (approximate) of the whole elastic structure of the wire constraint assembly 40 is maintained by the extension of the second elastic member 4015 for the two wires (the second wire 4011). Further, the second elastic member 4015 is a spring.
It can be understood that, in the embodiment, although two drawing restraining assemblies disposed at the left and right ends of the stage are taken as an example for description, the drawing restraining assemblies are not limited to two, and may be three or more, and may be uniformly arranged along the axial direction of the stage; when the table body is in a sheet shape (the thickness in the x direction is smaller), the number of the drawing restraining components can be one.
Based on the same utility model discloses think, the embodiment of the utility model provides an in still providing a calibration method for weak power test, use foretell calibration arrangement to mark, like following embodiment, this calibration method includes following step:
s101, adjusting the moving distance of the micro-nano translation table in the horizontal direction, and enabling a first standard weak force exerted by a calibration ball abutting against a first end face of the table body to be equal to a first thrust of the micro-thruster.
S102, calculating a first calibration coefficient according to the relation between the moving distance of the micro-nano translation table in the horizontal direction and the output of the micro-thruster.
In step S101, a first normal weak force F and a first thrust force N1When the stage body 20 is in the balanced state, the displacement of the stage body 20 in the horizontal direction is 0, the stage body 20 can be adjusted to be in the balanced state by the micrometer 50, and at the moment, the first standard weak force F is generated1With a first thrust N1Are equal in size.
In the step S102, in the step S,
the output value Δ V of the micro-thruster 30 is equal to N1SFWherein S isFIs the first calibration factor and, therefore,
wherein, DeltaV is micro-thrust test output, mcTo calibrate the mass of the ball, LcLength of the suspension wire, g0Is acceleration of gravity, Δ xcThe moving distance of the ball in the horizontal direction is calibrated under the action of the micro-nano translation table.
Further, calibration can be performed through a second calibration component, and the calibration method further comprises the following steps:
s103, adjusting the current of the conductor component to enable the second standard weak force exerted by the electrified conductor component under the action of the magnetic field of the magnetic component to be equal to the thrust of the micro-thruster.
And S104, calculating a second calibration coefficient according to the relation between the current of the conductive part and the output of the micro-thruster.
In step S103, a second normal weak force F' and a second thrust force N2When the stage body 20 is in the balanced state, the displacement of the stage body 20 in the horizontal direction is 0, the stage body 20 can be adjusted to be in the balanced state by the micrometer 50, and at the moment, the second standard weak force F' and the second thrust N2Are equal in size.
In step S104, N2＝F′＝BLBΔ I, output value Δ V of micro propeller 30 ═ N2S′FWherein, S'FIs the second calibration factor and, therefore,
wherein, DeltaV is micro-force test output, B is magnetic field intensity of the magnetic component, and LBΔ I is the current of the conductive member for the effective length of the conductive member within the magnetic field.
Further, the first calibration assembly 60 and the second calibration assembly 70 may also be calibrated mutually, for example, when the mass of the standard ball 603 of the first calibration assembly 60 is calibrated in advance by a precision balance with a precision of milligram, and the precision of the micro-nano translation stage is also calibrated in advance, the precision calibration of the current of the conductor part 701 in the second calibration assembly 70 may be assisted to be completed, specifically, the calibration method further includes the following steps:
and S105, adjusting the moving distance of the micro-nano translation table in the horizontal direction and the current of the conductor component, so that a third standard weak force exerted by the calibration ball abutting against the second end face of the table body is equal to a fourth standard weak force exerted by the electrified conductor component under the action of the magnetic field of the magnetic component.
And S106, correcting the current of the conductive component according to the relation between the moving distance of the micro-nano translation table in the horizontal direction and the current of the conductive component.
In step S105, it is determined by the micrometer 50 that the stage 20 is in the equilibrium position, at which time the third normal weak force N3And a fourth normal weak force N4Opposite in direction and equal in size.
In the step S106,
N4＝BLB·ΔI，
Δ I is the current of the conductive member.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A suspension calibration device for weak force testing, characterized in that the calibration device comprises:
a mounting frame;
the table body is arranged on the mounting frame, the table body is provided with a first accommodating cavity extending in the axial direction and a second accommodating cavity extending in the radial direction, and a first end face and a second end face which are parallel to the cross section of the table body and opposite to each other are formed on the side wall of the second accommodating cavity;
the micro propeller is arranged in the first accommodating cavity;
the first calibration assembly is used for generating weak force and comprises a micro-nano translation table, a suspension wire and a calibration ball, wherein the micro-nano translation table is arranged on the mounting frame and can move along the horizontal direction, one end of the suspension wire is arranged on the micro-nano translation table, the calibration ball is arranged at the other end of the suspension wire, and the calibration ball is suspended in the second accommodating cavity and is positioned at the corresponding position of the first end face and the second end face; and
and the micrometer is arranged on the table body.
2. The suspension calibration device for weak force test as claimed in claim 1, wherein said calibration device further comprises:
and the second calibration assembly for generating weak force comprises a conductor component arranged at one end of the table body far away from the micro-thruster and a magnetic component for generating a magnetic field.
3. The suspension calibration device for weak force test as claimed in claim 2, wherein a fixing portion is formed at an end of the table body away from the micro-thruster, the conductor component is a coil wound around the fixing portion, the magnetic component is a ring-shaped permanent magnet, and the coil is located in a magnetic field of the magnetic component.
4. The suspension calibration device for weak force test as claimed in claim 2, wherein the first receiving cavity and the second receiving cavity are not communicated with each other, the first receiving cavity extends from the first end of the table body, the second receiving cavity is disposed near the second end of the table body, and the second calibration assembly is disposed at the second end of the table body.
5. The suspension calibration device for weak force test as claimed in claim 1 or 2, wherein the calibration device further comprises: at least one wire drawing constraint component arranged between the table body and the mounting frame and used for constraining the degree of freedom of the table body; wire drawing restraint subassembly includes a application of force regulating part and three piece at least first wire drawing, application of force regulating part is used for the stage body exerts the pulling force and does first wire drawing loading tension, the one end of first wire drawing is located installation frame, the other end are located the stage body surface, three piece at least wire drawing are in the interval such as each other in the circumference of stage body and are radially laying.
6. The suspension calibration device for weak force test as claimed in claim 5, wherein the force applying adjustment member comprises a second wire, a fixed pulley and a force applying mechanism, one end of the second wire is arranged on the table body, and the other end of the second wire is connected with the force applying mechanism through the fixed pulley.
7. The suspension calibration device for weak force test as claimed in claim 5, wherein the force application adjusting member comprises a second wire and an elastic member disposed on the second wire.
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| CN110333032A (en) * | 2019-06-13 | 2019-10-15 | 中国科学院测量与地球物理研究所 | Suspension caliberating device and scaling method for low force test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110333032A (en) * | 2019-06-13 | 2019-10-15 | 中国科学院测量与地球物理研究所 | Suspension caliberating device and scaling method for low force test |
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