CN115079737B - Gravitational acceleration modulation device and method - Google Patents
Gravitational acceleration modulation device and method Download PDFInfo
- Publication number
- CN115079737B CN115079737B CN202210860338.9A CN202210860338A CN115079737B CN 115079737 B CN115079737 B CN 115079737B CN 202210860338 A CN202210860338 A CN 202210860338A CN 115079737 B CN115079737 B CN 115079737B
- Authority
- CN
- China
- Prior art keywords
- flywheel
- particles
- module
- vacuum
- acceleration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001133 acceleration Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 120
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 230000005684 electric field Effects 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000005303 weighing Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000005292 diamagnetic effect Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 108010083687 Ion Pumps Proteins 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012576 optical tweezer Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a gravitational acceleration modulation device and method. The gravitational acceleration modulation device comprises particles, a modulation module, a vacuum module, a capture module and a detection module; the modulation module comprises a flywheel, a rotating shaft, a coupling, a speed reducer, a motor, a three-shaft precision displacement platform and a motor support which are sequentially connected; the motor drives the flywheels to periodically move relative to each other through the speed reducer and the coupling, so that the force or acceleration is modulated; the vacuum module is used for providing an ultrahigh vacuum environment; the capture module captures particles by using a magnetic field, an optical field or an electric field; the detection module is used for detecting the motion information of the particles; the modulation module and the capture module are integrally arranged in the vacuum module. The invention utilizes the law of gravitational force to avoid the influence caused by mass error, designs a flywheel structure, can realize double frequency modulation of particle signals, avoids the influence of inherent frequency noise of a motor, realizes gravitational acceleration calibration, and can be applied to the fields of quantum sensing, precision measurement and the like.
Description
Technical Field
The invention relates to the technical field of gravitational or acceleration modulation calibration, in particular to a gravitational acceleration modulation device and a gravitational acceleration modulation method.
Background
In the application of weak force and acceleration sensing, the optical tweezers technology and the magnetic suspension technology in low-pressure gas can measure the weak force and the acceleration, so that the method has important requirements in the fields of non-Newtonian gravity verification, ultra-precise navigation and the like, and the ng-level precision measurement is realized at present. The existing angular acceleration rotation modulation mechanism usually needs a motor on a base to provide high-frequency shaking driving, and the driving mode has the reaction moment directly acting on the base, so that the platform is difficult to keep stable precision, and further measurement calibration errors are caused. At present, when a base torque motor drives a table body to rotate at a uniform speed through a rotating shaft, two rotating table bodies with the same inertia are driven by an electromagnetic device to form periodic relative angular position rotation, so that angular acceleration modulation is realized, the two moving table bodies have angular momentum change quantities with the same numerical value and opposite directions, and the resultant angular momentum change quantity is close to zero, so that the reaction moment of the table body relative to the base is also close to zero, and the reaction moment generated by the angular acceleration modulation is further inhibited (CN 104578570A, a dynamic disturbance rotation modulation mechanism). Some adopt weighing measurement calibration, prepare the standard body at first, then test the mass center and calibrate again, the signal of the sensor of the retransmission of the symmetry is already changed into the digital signal after the comprehensive test is processed, the test data that is shown in the control system after the weighing sensor is forced can be equal to the magnitude of the sensor stress as long as multiply a coefficient, call this coefficient as the transmission coefficient of the sensor, note K. The mass center measurement is obtained by the stress before and after the reading analysis of the weighing sensor, the sensor coefficient K is irrelevant to the gravity acceleration, the mass center measurement is also irrelevant to the gravity acceleration, and the influence of the gravity acceleration is not considered as long as the calibration process and the product measurement process are in the same place in the actual operation (CN 10509201)0A-a method for calibrating weighing sensor coefficient and gravitational acceleration). A Naniu-level weak force calibration device is used for performing high-precision real-time calibration on a horizontal shaft swinging type weak force test board and adopts the working principle expression as
Firstly, a calibration object is loaded on different V-shaped grooves on a calibration arm twice through a micro-displacement adjusting mechanism, and the difference delta of deflection angles of two times of swing arms compared with an initial balance position is measured through a displacement/angle sensorθBy calculating a calibration force coefficient k, taking away a calibration object after calibration is finished, and returning the swing arm to an initial balance position; then generating thrust through the micro propeller to be testedF x Measuring the deflection angle delta of the swing arm compared to the initial equilibrium position by means of a displacement/angle sensorθ x The thrust to be measured is realized through the calculated calibration force coefficient kF x The calibration (CN 216207186U, a Naniu level weak force calibration device).
In the existing gravity or acceleration modulation method, a measurement rotary table body of a modulation device has rotational inertia errors, the mass calibrated by weighing measurement also has mass errors, and the high-frequency jitter driving of a motor also brings vibration errors and larger errors to calibration.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a gravitational acceleration modulation device and method, which can trace back to the law of universal gravitation, wherein the law of universal gravitation is the most accurate known force source at present, and theoretically, the gravitational acceleration modulation device has no coupling effect with temperature, vibration and electromagnetic field and has higher credibility; the method has the advantages of no need of introducing an electromagnetic field, simple operation and small unknown system error.
The technical scheme for realizing the purpose of the invention is as follows:
a gravitational acceleration modulation device comprises particles, a modulation module, a vacuum module, a capture module and a detection module;
the modulation module comprises a flywheel, a rotating shaft, a coupling, a speed reducer, a motor, a three-axis precision displacement platform and a motor support which are sequentially connected; the motor drives the flywheels to periodically move relative to each other through the speed reducer and the coupling, so that force or acceleration modulation is realized;
the vacuum module is used for providing an ultrahigh vacuum environment;
the capture module captures particles by using a magnetic field, an optical field or an electric field;
the detection module is used for detecting the motion information of the particles;
the modulation module and the capture module are integrally arranged in the vacuum module.
The vacuum module comprises a vacuum cavity, a vacuum tube, a vacuum pump and a vacuum gauge, the vacuum pump is connected with the corrugated tube, the corrugated tube is connected with the vacuum cavity, the vacuum gauge is connected with the vacuum cavity, the vacuum pump vacuumizes the vacuum cavity, and the vacuum gauge measures the vacuum degree in the vacuum cavity in real time.
The detection module comprises a laser, a light beam adjusting lens, a reflector, a converging lens, a half-wave plate, a polarization beam splitter and a detector in sequence on a light path, the laser irradiates particles, and the scattered light of the particles passes through the converging lens, the half-wave plate and the polarization beam splitter and finally reaches the detector to detect the motion information of the particles.
The flywheel is made of stainless steel, gold, silver and copper metal materials; the flywheel is of an axisymmetric structure and comprises a runway-shaped structure and a dumbbell-shaped structure.
The capture module sequentially comprises a base, a support and an anti-magnetic suspension structure from bottom to top and is used for forming a magnetic potential well through magnetic suspension to suspend particles.
The particles are made of silicon, silicon dioxide, organic glass or metal materials.
The modulation module is arranged vertically or horizontally.
The motor is a servo motor or a stepping motor.
The three-axis precision displacement platform adopts a three-axis fine adjustment flywheel and particle distance, and the precision reaches the um level.
A gravitational acceleration modulation method adopts the gravitational acceleration modulation device to utilize the law of gravitational constant force, and comprises the following steps:
the first step is as follows: to the particle atress analysis, the particle receives the gravitation effect of flywheel, and the acceleration that produces divides 3 components, is respectively:F x 、F y 、 F z ；
the second step: transforming the coordinate system of the particles and the flywheel, namely, the particles rotate around the flywheel;
the third step: calculating the acceleration of the flywheel to the particles by integration;
in the formula,αg is the acceleration of the flywheel to the particles, G is the constant of universal gravitation,ρthe flywheel density is represented by the coordinates of the center of mass of the particles (x 0 ，y 0 ，z 0 ) R is the distance between the flywheel and the particles, M is the mass of the particles, M is the mass of the flywheel, and coordinates (x, y, z) of the mass center of the flywheel mass unit;
fourthly, calculating the acceleration of the flywheel to the X axis and the Y axis of the particles;
wherein,
r 2 =( x –x 0 ) 2 + (y–y 0 ) 2 + (z–z 0 ) 2
x 0 = r m cos(ωt) ，y 0 = r m sin (ωt) ，z 0 =d；
in the formula,a x for the acceleration of the flywheel in the X-axis direction of the particles,a y is a flywheelAccelerating the Y-axis direction of the particles, G is a universal gravitation constant,ρthe flywheel density is represented by the coordinates of the center of mass of the particles (x 0 ，y 0 ，z 0 )，rThe distance between the flywheel and the particles is,r m is the radius of the orbit of the particles,ωis the angular frequency of rotation;
fifthly, calculating the transverse acceleration vertical to the gravity direction;
the direction of the particle center pointing to the central axis of the cuboid is taken as the x direction, and the direction perpendicular to the x direction is taken as the y direction;
the acceleration of gravity in the x direction is:
A x = a x cos(ωt) + a y sin(ωt) ；
the gravitational acceleration in the y direction is:
A y = a y cos(ωt) – a x sin(ωt) ；
finally, frequency doubling modulation of particle signals is achieved, influence of inherent frequency noise of a motor is avoided, calibration of gravity or ng-order acceleration is achieved, and influence caused by mass errors of particles and a flywheel is avoided.
The invention has the beneficial effects that:
the universal gravitation law can be traced back to, is the most accurate known force source at present, theoretically has no coupling effect with temperature, vibration and electromagnetic field, and has higher reliability; and an electromagnetic field is not required to be introduced, the operation is simple, and the unknown system error is small. The flywheel structure is an equiaxial symmetrical structure of a runway type structure and a dumbbell type structure, and double frequency modulation of acceleration is guaranteed. The invention realizes the double frequency modulation of particle signals, avoids the influence of the inherent frequency noise of the motor and realizes the calibration of gravity or ng-level acceleration. The capture module can capture in a magnetic field, an optical field and an electric field. The particle material of the invention is silicon, silicon dioxide, organic glass, metal and other materials. The modulation module can be vertically arranged and horizontally arranged. The motor of the invention is a servo motor, a stepping motor and the like. The three-axis precise displacement platform can be used for fine adjustment of the distance between the flywheel and particles in three axes, and the precision reaches the um level. The device and the method can be applied to the technical field of gravity or acceleration modulation calibration.
Drawings
Fig. 1.1 is a schematic structural diagram of the gravitational acceleration modulation device of the present invention.
FIG. 1.2 is another schematic structural diagram of the gravitational acceleration modulation device of the present invention.
FIG. 2 is a diagram illustrating the force exerted on the particles according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a flywheel and a particle transformation coordinate system according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of the flywheel and the particle return to original coordinates according to an embodiment of the present invention.
FIG. 5 is a time domain frequency domain diagram of gravitational acceleration in the X direction of a particle according to an embodiment of the present invention.
FIG. 6 is a time domain frequency domain diagram of gravitational acceleration in the Y direction of a particle in accordance with an embodiment of the present invention.
In the figure, a particle 1, a modulation module 2, a vacuum module 3, a capture module 4 and a detection module 5;
the modulation module 2 comprises a flywheel 2.1, a rotating shaft 2.2, a coupling 2.3, a speed reducer 2.4, a motor 2.5, a three-axis precision displacement table 2.6 and a motor support 2.7;
the vacuum module 3 comprises a vacuum cavity 3.1, a vacuum tube 3.2, a vacuum pump 3.3 and a vacuum gauge 3.4;
the capture module 4 comprises a base 4.1, a bracket 4.2 and a diamagnetic suspension structure 4.3;
the detection module 5 comprises a laser 5.1, a beam adjusting lens 5.2, a reflector 5.3, a converging lens 5.4, a half-wave plate 5.5, a polarization beam splitter plate 5.6 and a detector 5.7.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.
As shown in fig. 1.1, the gravitational acceleration modulation device includes a particle 1, a modulation module 2, a vacuum module 3, a capture module 4, and a detection module 5.
As shown in fig. 1.1 and 1.2, the modulation module 2 includes a flywheel 2.1, a rotating shaft 2.2, a coupling 2.3, a reducer 2.4, a motor 2.5, a three-axis precision displacement table 2.6, and a motor support 2.7, which are connected in sequence; the motor 2.5 drives the flywheel 2.1 to move periodically relative to each other through the speed reducer 2.4 and the coupler 2.3, so as to modulate the force or the acceleration.
The vacuum module 3 comprises a vacuum chamber 3.1, a vacuum tube 3.2, a vacuum pump 3.3 and a vacuum gauge 3.4, wherein the vacuum pump 3.3 is connected with a corrugated tube 3.2, the corrugated tube 3.2 is connected with the vacuum chamber 3.1, the vacuum gauge 3.4 is connected with the vacuum chamber 3.1, the vacuum pump 3.3 vacuumizes the vacuum chamber 3.1, the vacuum gauge 3.4 measures the vacuum degree in the vacuum chamber 3.1 in real time, and the vacuum module 3 is mainly used for providing an ultrahigh vacuum environment.
The vacuum gauge 3.4 is fixed on the vacuum cavity 3.1 through screw knife edge sealing, the vacuum tube 3.2 is connected with the vacuum cavity 3.2 through screw knife edge sealing, and the vacuum pump 3.3 comprises a mechanical pump, a molecular pump, an ion pump and the like which are connected with the vacuum tube 3.2 through screw and nut knife edge sealing.
The capturing module 4 sequentially comprises a base 4.1, a bracket 4.2 and an anti-magnetic suspension structure 4.3 from bottom to top; the support 4.2 is fixed on the base 4.1 through screws, the light beam adjusting lens 5.2, the reflector 5.3, the converging lens 5.4 and the diamagnetic suspension structure 4.3 are arranged on the support 4.2, a magnetic potential well is formed through magnetic suspension to suspend the particles 1, and the suspended particles 1 can be captured in an optical trap and an electric trap.
The detection module 5 sequentially comprises a laser 5.1, a light beam adjusting lens 5.2, a reflector 5.3, a converging lens 5.4, a half-wave plate 5.5, a polarization beam splitter 5.6 and a detector 5.7 on a light path, the particle 1 is irradiated by the laser 5.1, and scattered light of the particle 1 passes through the converging lens 5.4, the half-wave plate 5.5 and the polarization beam splitter 5.6 and finally reaches the detector 5.7 to detect the motion information of the particle.
The flywheel 2.1 is in an axisymmetric structure and comprises a runway-shaped structure and a dumbbell-shaped structure.
The flywheel 2.1 is made of stainless steel, gold, silver, copper and other metal materials.
The capture module 4 captures the particles 1 using a magnetic, optical or electric field.
The particles 1 are made of silicon, silicon dioxide, organic glass or metal materials. The particle 1 is irradiated by the laser 5.1, and the scattered light of the particle 1 passes through the converging lens 5.4, the half-wave plate 5.5, the polarization beam splitter plate 5.6 and finally the detector 5.7 to detect the motion information of the particle 1.
The modulation module 2 is arranged vertically or horizontally.
The motor 2.5 is a servo motor or a stepping motor.
The triaxial precision displacement platform 2.6 adopts triaxial fine setting flywheel 2.1 and particle 1 distance, and the precision reaches um level.
The modulation module 2 and the capture module 4 are integrally installed in the vacuum cavity 3, firstly, a base 4.1 is fixed on a bottom plate of the vacuum cavity 3 through screws, and a motor support 2.7 is fixedly connected on the base 4.1 through screws; the three-axis precision displacement table 2.6 is fixed on the motor support 2.7 through screws, the three-axis precision displacement table 2.6 has vacuum compatibility, the regulation and control of micrometer-level precision are carried out on the three-axis directions of an X axis, a Y axis and a Z axis, the relative position of the flywheel 2.1 and the particle 1 support is accurately controlled, and the precision regulation and control of the particle 1 are realized; motor 2.5 is fixed with accurate displacement table 2.6 of triaxial through the switching of keysets 2.7, and the speed reduction of motor 2.5 speed is realized to motor 2.5 output shaft reduction gear 2.4, guarantees the low frequency modulation of flywheel 2.1, and reduction gear 2.4 output shaft passes through shaft coupling 2.3 and connects rotation axis 2.2, and the solidification of rotation axis 2.2 realization and flywheel 2.1.
The modulation module 2, the vacuum module 3, the capture module 4, the detection module 5 and the like of the device are connected and installed, and after the correctness is confirmed, the diamagnetic suspension structure 4.3 of the capture module 4 captures the particles 1, so that the capture of the particles 1 is completed.Starting a mechanical pump to vacuumize the vacuum cavity 3.1 by using the vacuum module 3, and when a vacuum gauge 3.2 displays that the vacuum cavity is vacuumized to be lower than 10 DEG C -1 After mbar, the vacuum chamber 3.1 was evacuated by starting the molecular pump, when vacuum gauge 3.2 indicated that the vacuum chamber was evacuated to a level below 1X 10 -6 At mbar, turning on the ion pump vacuum can bring the vacuum chamber 3.2 to a higher ultimate vacuum. Starting the modulation module 2, adjusting a three-axis precise displacement table 2.6, regulating and controlling the precision of the modulation module in the micrometer level in the three-axis directions of an X axis, a Y axis and a Z axis, precisely controlling the relative position of the flywheel 2.1 and the particle support 4.2, and realizing the precise regulation and control of the particles 1; the motor 2.5 moves and drives the flywheel 2.1 to move periodically relative to the other through the speed reducer 2.4 and the coupler 2.3, so that the gravitational acceleration is modulated. The detection module 5 irradiates the particles 1 through the laser 5.1, and scattered light of the particles 1 passes through the converging lens 5.4, the half-wave plate 5.5, the polarization beam splitter plate 5.6, and finally the detector 5.7 to detect the motion modulation information of the particles 1.
In this embodiment, a gravitational acceleration modulation method using the law of gravitational constant includes the following steps:
the first step is as follows: as shown in fig. 2, a schematic diagram of the force applied to the particle 1 according to an embodiment of the present invention, for analyzing the force applied to the particle 1, the particle 1 is subject to the attraction of the flywheel 2.1, and the generated acceleration is divided into 3 components, which are:F x 、F y 、F z 。
the second step is that: fig. 3 is a schematic diagram of a transformation coordinate system of the flywheel 2.1 and the particle 1 according to an embodiment of the present invention, which transforms the coordinate system of the particle 1 and the flywheel 2.1, that is, the particle 1 rotates around the flywheel 2.1;
the third step: the acceleration of the flywheel 2.1 to the particle 1 is calculated through integration;
in the formula,αis the acceleration of the flywheel 2.1 to the particle 1, G is the universal gravitation constant,ρthe flywheel has a density of 2.1 and the mass center coordinate of the particle 1 is (x 0 ，y 0 ，z 0 ) R is the distance between the flywheel 2.1 and the particle 1, M is the mass of the flywheel 2.1, and the mass center coordinates (x, y, z) of the mass unit of the flywheel 2.1.
The fourth step: calculating the acceleration of the flywheel 2.1 to the X axis and the Y axis of the particle 1;
wherein,r 2 =( x –x 0 ) 2 + (y–y 0 ) 2 + (z–z 0 ) 2
x 0 = r m cos(ωt) ，y 0 = r m sin (ωt) ，z 0 =d；
in the formula,a x for the acceleration of the particle 1 in the X-axis direction by the flywheel 2.1,a y for the acceleration of the flywheel 2.1 in the Y-axis direction of the particles 1,r m is the radius of the orbit of the particle 1,ωis the angular frequency of rotation.
The fifth step: FIG. 4 is a schematic diagram of the flywheel 2.1 and the particles 1 returning to the original coordinate system to calculate the lateral acceleration perpendicular to the gravity direction according to an embodiment of the present invention;
the direction from the center of the particle 1 to the central axis of the rectangular parallelepiped is the x direction, and the direction perpendicular to this is the y direction.
The acceleration of gravity in the x direction is:
A x = a x cos(ωt) + a y sin(ωt) ；
the gravitational acceleration in the y direction is:
A y = a y cos(ωt) – a x sin(ωt) ；
finally, double frequency modulation of the particle 1 signal is realized, influence of inherent frequency noise of the motor 2.5 is avoided, gravity or ng-order acceleration calibration is realized, and influence caused by mass error of the particle 1 and the flywheel 2.1 is avoided.
FIG. 5 and FIG. 6 are time domain frequency domain diagrams of gravitational acceleration of particles in X and Y directions in an application example.
Application examples
The length of the flywheel of the modulation module selected in the application embodiment is 20mm, the width is 10mm, the height is 10mm, the structural shape is a runway-type structure, the material of the flywheel is 304 stainless steel, the rotation frequency of the flywheel is 10Hz, the distance between the flywheel and the surface of the particle in the z direction is 250um, and the rotation radius of the particle relative to the center of the cuboid is 250umr m Is 11.2mm.
The operation steps are as follows:
1) Connecting and installing a modulation module 2, a vacuum module 3, a capture module 4, a detection module 5 and the like;
2) After confirming that no error exists, supporting the particle 1;
3) The diamagnetic suspension structure 4.3 of the capture module 4 captures the particles 1 to complete the capture of the particles 1;
4) A vacuum module 3 is utilized to start a mechanical pump to vacuumize a vacuum cavity 3.1;
5) When gauge 3.4 indicates that vacuum chamber 3.1 is evacuated to below 10 -1 After mbar, starting a molecular pump to vacuumize the vacuum cavity 3.1;
6) When gauge 3.4 indicates that vacuum chamber 3.1 is evacuated to below 1X 10 -6 When mbar occurs, the vacuum chamber 3.1 can be brought into higher limit vacuum by opening and starting the ion pump for vacuum pumping;
7) Starting the modulation module 2, adjusting a three-axis precise displacement table 2.7, regulating and controlling the precision of micron level in the three-axis directions of the X-axis modulation module, the Y-axis modulation module and the Z-axis modulation module, precisely controlling the relative position of the flywheel 2.1 and the particles 1, and realizing the precise regulation and control of the particles, so that the distance between the flywheel 2.1 and the surface of the particles 1 in the Z direction is 250um;
8) The motor 2.5 moves and drives the flywheel 2.1 through the speed reducer 2.4 and the coupling 2.3 to periodically rotate at the frequency of 10Hz, so that the gravitational acceleration of the particles 1 is modulated;
9) The detection module 4 irradiates the particles 1 through the laser 5.1, the scattered light of the particles 1 passes through the convergent lens 5.4, the half-wave plate 5.5 and the polarization beam splitter 5.6, and finally the detector 5.7 can detect the motion modulation information of the particles 1;
10 The time domain frequency domain diagram of the gravitational acceleration of the particles in the X and Y directions can be finally solved by a MATLAB program.
The embodiments in the above description can be further combined or replaced, and the embodiments are only described as preferred examples of the present invention, and do not limit the concept and scope of the present invention, and various changes and modifications made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention belong to the protection scope of the present invention. The scope of the invention is given by the appended claims and any equivalents thereof.
Claims (10)
1. A gravitational acceleration modulation device is characterized in that: comprises particles (1), a modulation module (2), a vacuum module (3),
A capturing module (4) and a detecting module (5);
the modulation module (2) comprises a flywheel (2.1), a rotating shaft (2.2), a coupler (2.3), a speed reducer (2.4), a motor (2.5), a three-axis precision displacement table (2.6) and a motor support (2.7) which are sequentially connected; wherein the motor (2.5) drives the flywheel (2.1) to move at a periodic relative position through the speed reducer (2.4) and the coupling (2.3) to realize the modulation of force or acceleration;
the vacuum module (3) is used for providing an ultrahigh vacuum environment;
the capture module (4) captures particles (1) by using a magnetic field, an optical field or an electric field;
the detection module (5) is used for detecting the motion information of the particles (1);
the modulation module (2) and the capture module (4) are integrally installed in the vacuum module.
2. The gravitational acceleration modulation device according to claim 1, wherein: the vacuum module (3) comprises a vacuum cavity (3.1), a corrugated pipe (3.2), a vacuum pump (3.3) and a vacuum gauge (3.4), the vacuum pump (3.3) is connected with the corrugated pipe (3.2), the corrugated pipe (3.2) is connected with the vacuum cavity (3.1), the vacuum gauge (3.4) is connected with the vacuum cavity (3.1), the vacuum pump (3.3) is used for vacuumizing the vacuum cavity (3.1), and the vacuum gauge (3.4) is used for measuring the vacuum degree in the vacuum cavity (3.1) in real time.
3. The gravitational acceleration modulation device according to claim 1, wherein: the detection module (5) sequentially comprises a laser (5.1), a light beam adjusting lens (5.2), a reflector (5.3), a converging lens (5.4), a half-wave plate (5.5), a polarization beam splitter (5.6) and a detector (5.7) on a light path, the laser (5.1) irradiates the particles (1), and scattered light of the particles (1) passes through the converging lens (5.4), the half-wave plate (5.5) and the polarization beam splitter (5.6) and finally reaches the detector (5.7) to detect the motion information of the particles.
4. The gravitational acceleration modulation device according to claim 1, wherein: the flywheel (2.1) is made of stainless steel, gold, silver and copper metal materials; the flywheel (2.1) is of an axisymmetric structure and comprises a runway-shaped structure and a dumbbell-shaped structure.
5. The gravitational acceleration modulation device according to claim 1, wherein: the capture module (4) sequentially comprises a base (4.1), a support (4.2) and an anti-magnetic suspension structure (4.3) from bottom to top, and is used for forming a magnetic potential well through magnetic suspension to suspend the particles (1).
6. The gravitational acceleration modulation device according to claim 1, wherein: the particles (1) are made of silicon, silicon dioxide, organic glass or metal materials.
7. The gravitational acceleration modulation device according to claim 1, wherein: the modulation module (2) is arranged vertically or horizontally.
8. The gravitational acceleration modulation device according to claim 1, wherein: the motor (2.5) is a servo motor or a stepping motor.
9. The gravitational acceleration modulation device according to claim 1, wherein: the three-axis precision displacement platform (2.6) adopts a three-axis fine adjustment flywheel (2.1) to be distant from the particles (1), and the precision reaches the um level.
10. A gravitational acceleration modulation method is characterized in that: the gravitational acceleration modulation device according to claim 1, which utilizes the law of gravitational force, comprising the following steps:
the first step is as follows: for the stress analysis of the particles (1), the particles (1) are subjected to the action of the gravity of a flywheel (2.1), and the generated acceleration is divided into 3 components:F x 、F y 、 F z ；
the second step is that: transforming a coordinate system of the particles (1) and the flywheel (2.1), namely, the particles rotate around the flywheel;
the third step: the acceleration of the flywheel (2.1) to the particles (1) is calculated through integration;
in the formula,αis the acceleration of the flywheel (2.1) to the particles (1), G is a universal gravitation constant,ρthe mass center coordinate of the particle (1) is (1) for the density of the flywheelx 0 ，y 0 ，z 0 ) R is the distance between the flywheel (2.1) and the particle (1), M is the mass of the particle (1), M is the mass of the flywheel (2.1), and mass center coordinates (x, y, z) of a mass unit of the flywheel (2.1);
fourthly, calculating the acceleration of the flywheel (2.1) to the X axis and the Y axis of the particle (1);
wherein,
r 2 =( x–x 0 ) 2 + (y–y 0 ) 2 + (z–z 0 ) 2
x 0 = r m cos(ωt) ，y 0 = r m sin (ωt) ，z 0 =d；
in the formula,a x is the acceleration of the flywheel (2.1) to the X-axis direction of the particles (1),a y is the acceleration of the flywheel (2.1) to the particle (1) in the Y-axis direction, G is a universal gravitation constant,ρthe flywheel (2.1) density is represented by the coordinate of the mass center of the particle (1) ((x 0 ，y 0 ，z 0 )，rThe distance between the flywheel (2.1) and the particles (1),r m is the radius of the orbit of the particle (1),ωd is the distance between the particle (1) and the flywheel (2.1) in the Z-axis direction;
fifthly, calculating the transverse acceleration vertical to the gravity direction;
the direction from the center of the particle (1) to the central axis of the cuboid is taken as the x direction, and the direction perpendicular to the x direction is taken as the y direction;
the acceleration of gravity in the x direction is:
A x = a x cos(ωt) + a y sin(ωt) ；
the gravitational acceleration in the y direction is:
A y = a y cos(ωt) – a x sin(ωt) ；
finally, double frequency modulation of the particle (1) signal is realized, the influence of inherent frequency noise of the motor (2.5) is avoided, the gravity or ng-order acceleration calibration is realized, and the influence caused by mass error of the particle (1) and the flywheel (2.1) is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210860338.9A CN115079737B (en) | 2022-07-22 | 2022-07-22 | Gravitational acceleration modulation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210860338.9A CN115079737B (en) | 2022-07-22 | 2022-07-22 | Gravitational acceleration modulation device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115079737A CN115079737A (en) | 2022-09-20 |
| CN115079737B true CN115079737B (en) | 2022-12-02 |
Family
ID=83242350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210860338.9A Active CN115079737B (en) | 2022-07-22 | 2022-07-22 | Gravitational acceleration modulation device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115079737B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115493726B (en) * | 2022-11-16 | 2023-05-05 | 之江实验室 | Vacuum anti-magnetic levitation force detector and application method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1772670C (en) * | 1990-11-02 | 1992-10-30 | Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" | Device for measuring strength of particles |
| CN1488150A (en) * | 2000-12-27 | 2004-04-07 | 罗伯特博士和小邦尼・贝克家庭联合企 | Gravitational wave generator using submicroscopic excitable elements |
| JP2008137104A (en) * | 2006-11-30 | 2008-06-19 | Tohoku Univ | Method and device for optical tweezers |
| CN101320049A (en) * | 2008-07-11 | 2008-12-10 | 浙江大学 | Apparatus for measuring acceleration by double optical beams, optical fibers and light traps |
| CN201237605Y (en) * | 2008-07-11 | 2009-05-13 | 浙江大学 | Apparatus for measuring acceleration by using double-beam optical fiber light trap |
| EP2246946A2 (en) * | 2009-04-29 | 2010-11-03 | Instrumentation Technologies d.d. | Optical system for transfer of timing reference |
| CN103941040A (en) * | 2014-04-23 | 2014-07-23 | 浙江大学 | Device and method for detecting acceleration on basis of back scattered light of nano particle detection |
| CN104034322A (en) * | 2014-06-19 | 2014-09-10 | 浙江大学 | Device for measuring angular speed through optical suspension rotor microgyroscope |
| CN112350508A (en) * | 2019-09-22 | 2021-02-09 | 蒋明龙 | Power source current power amplifier |
| CN112485163A (en) * | 2020-11-20 | 2021-03-12 | 浙江大学 | Device and method for feeding back cooling particles in double-beam optical trap |
| CN114624153A (en) * | 2022-05-16 | 2022-06-14 | 浙江大学 | Method and device for measuring radius of trapped particles of optical trap based on echo wall resonance mode |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080106222A1 (en) * | 2006-11-07 | 2008-05-08 | Joseph Ambrose | Driven relativistic oscillator to produce controlled deformations in local space-time curvature as a method for achieving particle confinement |
| CN101692098B (en) * | 2009-10-19 | 2011-09-07 | 浙江大学 | Optical fiber light trap acceleration measurement device |
| CN104406528B (en) * | 2014-11-25 | 2017-11-07 | 中国科学技术大学 | A kind of method of the calibrated in situ piezotable displacement based on optical trap |
-
2022
- 2022-07-22 CN CN202210860338.9A patent/CN115079737B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1772670C (en) * | 1990-11-02 | 1992-10-30 | Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" | Device for measuring strength of particles |
| CN1488150A (en) * | 2000-12-27 | 2004-04-07 | 罗伯特博士和小邦尼・贝克家庭联合企 | Gravitational wave generator using submicroscopic excitable elements |
| JP2008137104A (en) * | 2006-11-30 | 2008-06-19 | Tohoku Univ | Method and device for optical tweezers |
| CN101320049A (en) * | 2008-07-11 | 2008-12-10 | 浙江大学 | Apparatus for measuring acceleration by double optical beams, optical fibers and light traps |
| CN201237605Y (en) * | 2008-07-11 | 2009-05-13 | 浙江大学 | Apparatus for measuring acceleration by using double-beam optical fiber light trap |
| EP2246946A2 (en) * | 2009-04-29 | 2010-11-03 | Instrumentation Technologies d.d. | Optical system for transfer of timing reference |
| CN103941040A (en) * | 2014-04-23 | 2014-07-23 | 浙江大学 | Device and method for detecting acceleration on basis of back scattered light of nano particle detection |
| CN104034322A (en) * | 2014-06-19 | 2014-09-10 | 浙江大学 | Device for measuring angular speed through optical suspension rotor microgyroscope |
| CN112350508A (en) * | 2019-09-22 | 2021-02-09 | 蒋明龙 | Power source current power amplifier |
| CN112485163A (en) * | 2020-11-20 | 2021-03-12 | 浙江大学 | Device and method for feeding back cooling particles in double-beam optical trap |
| CN114624153A (en) * | 2022-05-16 | 2022-06-14 | 浙江大学 | Method and device for measuring radius of trapped particles of optical trap based on echo wall resonance mode |
Non-Patent Citations (1)
| Title |
|---|
| Review of optical tweezers in vacuum;Nan LI et al.;《Front Inform Technol Electron Eng》;20191231;第655-673页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115079737A (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102323624B (en) | Absolute gravity measuring system and measuring method as well as falling method of free-falling body | |
| CN108519103B (en) | Stable platform multi-attitude precision synchronous evaluation device and method using autocollimator | |
| CN102539028B (en) | Vertical ultra-micro force value measuring device based on principle of electrostatic force and source tracing method thereof | |
| CN104655154B (en) | A kind of high accuracy gyroscope instrument suspension static balance test device and method | |
| CN115079737B (en) | Gravitational acceleration modulation device and method | |
| CN113885098B (en) | Gravity sensor low-frequency response error online modeling and compensation method | |
| CN111811496B (en) | Oblique non-contact three-dimensional linear velocity and double-shaft dynamic angle measuring system and method | |
| US20090125265A1 (en) | Method for Calibrating a Laser-Based Spherical Coordinate Measurement System by a Mechanical Harmonic Oscillator | |
| CN101813499B (en) | Method and device for calibrating three-dimensional micro tactile sensor | |
| Zihao et al. | Control of a novel MEMS Fast Steering Mirror with improved quasi-static performance | |
| CN103837472A (en) | Micro cantilever beam deflection scanning system and method for micro cantilever beam array sensor based on multi-angle plane transmitting mirrors | |
| CN106556413B (en) | A kind of two axis based on piezoelectric ceramic motor are without magnetic electrical turntable | |
| CN216118048U (en) | Falling body optical center mass center measuring device | |
| CN105444777B (en) | A kind of fibre optic gyroscope error testing method under swinging condition | |
| CN116953288A (en) | Accelerometer resolution testing device and method utilizing excitation force of double eccentric motors | |
| RU2498356C1 (en) | Method of inserting laser beam vertical line in ballistic gravimeter and apparatus for realising said method | |
| CN114324977B (en) | Method for calibrating accelerometer of inertial navigation on centrifugal machine based on full-error analysis | |
| CN217058838U (en) | Multi-axis integrated micro-electro-mechanical system inertia device testing device and system | |
| CN110542430A (en) | large dynamic performance testing device and method for inertial measurement unit | |
| CN209214757U (en) | System for angular vibration measurement by using high-speed camera autocollimator | |
| CN203745360U (en) | Micro-cantilever deflection scanning system of micro-cantilever array sensor based on multi-angle planar transmission mirrors | |
| CN113406715A (en) | Absolute gravimeter falling body error measuring device | |
| TWI247095B (en) | Optical revolving spindle error measurement device | |
| CN1619264A (en) | Ultra micro quantity detecting device and detecting method | |
| CN106679655B (en) | Position sensor based on photoelectric switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |