CN117572518A - Automatic calibration system and method for atomic gravimeter - Google Patents
Automatic calibration system and method for atomic gravimeter Download PDFInfo
- Publication number
- CN117572518A CN117572518A CN202311657825.6A CN202311657825A CN117572518A CN 117572518 A CN117572518 A CN 117572518A CN 202311657825 A CN202311657825 A CN 202311657825A CN 117572518 A CN117572518 A CN 117572518A
- Authority
- CN
- China
- Prior art keywords
- angle
- laser
- goniometer
- gravity
- alpha
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 24
- 230000005484 gravity Effects 0.000 claims abstract description 76
- 238000005259 measurement Methods 0.000 claims abstract description 57
- 230000008569 process Effects 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000005305 interferometry Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 230000001133 acceleration Effects 0.000 description 11
- 230000001276 controlling effect Effects 0.000 description 11
- 230000007774 longterm Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses an automatic calibration system of an atomic gravimeter, which comprises an electric leveling platform, a processor, a laser transmitter, a goniometer, a first laser reflector, a piezoelectric deflection mirror and a second laser reflector, wherein the goniometer is connected with a gravity sensing unit; the processor is respectively connected and controls the gravity sensing unit and the electric leveling platform, reads the posture and the laser angle of the gravity sensing unit uploaded by the gravity sensing unit, automatically completes the adjustment and the calibration of the incident measurement laser and the reflection measurement laser directions in the atomic gravimeter, realizes the adjustment and the calibration of the posture and the laser angle of the gravity sensing unit, and finally completes the automatic calibration of the measurement laser wave vector directions.
Description
Technical Field
The invention belongs to the technical field of atomic gravimeters, and particularly relates to an automatic calibration system for measuring the laser wave vector direction of an atomic gravimeter and an automatic calibration method thereof.
Background
Atomic gravityThe instrument controls atoms by utilizing laser, so that material wave packets of the atoms interfere, and absolute measurement of gravitational acceleration is realized. The laser beam used to manipulate atoms to form an atomic interferometer may be referred to as a measurement laser beam, where after the measurement laser beam interacts with the atoms to cause the atoms to undergo transitions, the atoms acquire momentum in the direction of the wave vector of the measurement laser beam. When the direction of the laser wave vector is inconsistent with the direction of the gravitational acceleration, and a certain included angle exists, the gravity measurement result of the atomic gravity meter can generate measurement errors, and the gravity measurement accuracy is reduced. An angular deviation of 100 mu rad will introduce 5X 10 -8 m/s 2 This is extremely demanding for measuring the direction of the laser.
By modulating the laser angle and measuring the gravity value, the relation between the angle and the gravity value is fitted, so that the angle when the laser wave vector direction is coincident with the gravity direction can be obtained, the calibration is realized, and the system error is reduced. At present, the angle adjustment process conventionally adopts a mode of manually adjusting the gravity sensitive unit supporting feet, the direction of measuring laser wave vector is indirectly changed by adjusting the whole inclination of the sensitive unit, and a few gravimeter also starts to use an electric leveling device to replace the manual adjustment process.
The gravity acceleration is measured after the angle is repeatedly adjusted for many times in the calibration process, and the professional carries out data post-processing, so that the operation and the use threshold of the gravity meter product are increased. In addition, the calibration process does not consider deformation of the laser transmitter caused by environmental factors such as temperature, vibration and the like, so that long-time drift of a laser incident angle is caused, the long-term measurement accuracy of the atomic gravimeter is reduced, and the maintenance frequency of a product is greatly increased.
After the first adjustment of the cold atomic gravimeter product is finished, the calibration of the laser incident angle can not be carried out under the condition that the sensitive unit is not disassembled, so that the maintenance difficulty of the product is increased.
Disclosure of Invention
In order to solve the defects in the prior art and improve the intellectualization and long-term stability of an atomic gravimeter, one of the purposes of the invention is to provide a system for automatically calibrating the atomic gravimeter by measuring the laser wave vector direction, which can quickly and intelligently adjust the measuring laser wave vector direction to be parallel to the gravity direction and eliminate the gravity measurement error caused by the laser direction.
The technical scheme adopted for solving the technical problems is as follows: the automatic calibration system of the atomic gravity meter comprises an electric leveling platform for bearing a gravity sensing unit, a processor connected with the electric leveling platform, a laser transmitter, a goniometer arranged on the table top of the electric leveling platform, a first laser reflector, a piezoelectric deflection mirror and a second laser reflector which are sequentially arranged on an emergent light path of the laser transmitter, wherein the goniometer is connected with the gravity sensing unit, the second laser reflector is fixed on the goniometer, and the piezoelectric deflection mirror, the goniometer and the electric leveling platform are respectively connected with the processor; the laser transmitter sends out the incident laser that satisfies atom coherence transition condition as measuring laser, reflects to the horizontal direction through first laser reflector, and then reflects to vertical direction through piezoelectricity beat mirror, and incident laser produces reflected laser after the reflection of second laser reflector, and reflected laser and incident laser act on the atom that is in the free fall state after cooling prison jointly, control the atom to accomplish beam splitting, reflection and convergence, accomplish the interferometry process, output gravity measurement value to the treater through signal acquisition and data processing.
According to the automatic calibration system of the atomic gravimeter, the electric leveling platform adjusts the angle change of the table top through the stepping motor.
According to the automatic calibration system of the atomic gravimeter, the angle of incident laser is adjusted by the special piezoelectric deflection mirror through piezoelectric ceramics.
The second object of the present invention is to provide an automatic calibration method for automatic calibration of an atomic gravimeter, comprising the following steps:
s1, placing the automatic calibration system, powering on, completing preheating and starting automatic leveling: the processor controls the piezoelectric deflection mirror to drive the piezoelectric ceramics to adjust the angle of the piezoelectric deflection mirror to a standard value alpha x0 And alpha y0 The method comprises the steps of carrying out a first treatment on the surface of the The processor controls the electric leveling platform, uses the angle of the goniometer as a feedback target, and adjusts the posture of the gravity sensitive unit by using the stepping motor to measureAngle of angle meter is regulated to a standard value beta x0 And beta y0 The method comprises the steps of carrying out a first treatment on the surface of the Finishing automatic leveling;
s2, starting automatic calibration: controlling the x-axis angle of the piezoelectric deflection mirror to be within a certain range at two sides of a preset angle, sequentially setting the x-axis angle at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the x-axis angle of the piezoelectric deflection mirror and the gravity measurement value to perform fitting to obtain alpha x Is a calibration value alpha of (a) x0 Setting a new preset value and controlling the piezoelectric deflection mirror to adjust the x-axis angle to alpha x0 The method comprises the steps of carrying out a first treatment on the surface of the Controlling the y-axis angle of the piezoelectric deflection mirror to be within a certain range on two sides of a preset angle, sequentially setting the y-axis angle at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the y-axis angle of the piezoelectric deflection mirror and the gravity measurement value for fitting to obtain alpha y Is a calibration value alpha of (a) y0 Setting a new preset value and controlling the piezoelectric deflection mirror to adjust the y-axis angle to alpha y0 The method comprises the steps of carrying out a first treatment on the surface of the Controlling an electric leveling platform, taking the angle of the goniometer as a target value, enabling the angle of an x-axis to be within a certain range on two sides of a preset angle, sequentially setting the angles at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the x-axis angle of the goniometer and fitting the gravity measurement value to obtain beta x Is a calibration value beta of (2) x0 Set to a new preset value and control the motorized leveling platform 2 to adjust the angle of the x-axis of the goniometer to beta x0 The method comprises the steps of carrying out a first treatment on the surface of the Controlling an electric leveling platform, taking the angle of the goniometer as a target value, enabling the angle of a y axis to be within a certain range on two sides of a preset angle, sequentially setting the angles at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the y-axis angle of the goniometer and fitting the measured value of gravity to obtain beta y Is a calibration value beta of (2) y0 Setting a new preset value and controlling the electric leveling platform 2 to adjust the y-axis angle of the goniometer to beta y0 The method comprises the steps of carrying out a first treatment on the surface of the The automatic calibration is completed.
The beneficial effects of the invention are as follows:
1, the piezoelectric deflection mirror and the electric leveling platform are controlled to be quickly adjusted to a preset angle, so that the direction of a laser wave vector is ensured to be parallel to the direction of gravitational acceleration, and the gravity measurement error caused by the laser direction is eliminated;
2, the piezoelectric deflection mirror is adopted to adjust the incident laser angle, so that the calibration of the incident laser direction can be realized conveniently, the angle drift caused by environmental stress in a conventional atomic gravimeter is avoided, and the long-term gravity measurement drift of the gravimeter is restrained;
the attitude of the gravity sensing unit can be adjusted by utilizing the electric leveling platform, so that the angle adjustment of incident laser and reflected laser is realized;
and 4, the invention can automatically perform angle adjustment, gravity measurement, data fitting and angle preset value modification by using a main control program, finish the accurate calibration of the incident measurement laser and the reflection measurement laser directions, realize one-key calibration, and can finish the self calibration of the laser wave vector directions after long-term storage and use, and inhibit the long-term gravity measurement drift of the gravimeter.
Drawings
FIG. 1 is a schematic diagram of an automatic calibration system according to the present invention;
FIG. 2 is a schematic diagram of a gravity sensitive unit calibration;
fig. 3 is a schematic diagram of automatic calibration of the direction of the measuring laser wave vector.
The reference numerals are as follows: 1-gravity sensing unit, 1-laser transmitter, 1-2-first laser reflector, 1-3-piezoelectric deflection mirror, 1-4-incident laser, 1-5-atom, 1-6-reflected laser, 1-7-second laser reflector, 1-8-goniometer, 2-electric leveling platform and 3-processor.
Detailed Description
In order to better illustrate the embodiments and advantages of the present patent, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be noted that the examples used herein are merely for explaining the present patent, and do not limit the scope of application of the present patent.
Example 1
Referring to fig. 1 and 2, the automatic calibration system of an atomic gravimeter disclosed by the invention comprises an electric leveling platform 2 for bearing a gravity sensing unit 1, a processor 3 connected with the electric leveling platform 2, a laser transmitter 1-1, and a goniometer 1-8 arranged on the table top of the electric leveling platform 2, wherein in the embodiment, the electric leveling platform 2 drives the angle change of the table top by using a stepping motor, the automatic calibration system further comprises a first laser reflector 1-2, a piezoelectric deflection mirror 1-3 and a second laser reflector 1-7 which are sequentially arranged on an emergent light path of the laser transmitter 1-1, the goniometer 1-8 is connected with the gravity sensing unit 1, the second laser reflector 1-7 is fixedly connected with the goniometer 1-8, the piezoelectric deflection mirror 1-3, the goniometer 1-8 and the electric leveling platform 2 are respectively connected with the processor 3, and the piezoelectric deflection mirror 1-3 adjusts the angle of incident laser 1-4 through piezoelectric ceramics; the laser transmitter 1-1 emits incident laser 1-4 meeting atom coherence transition conditions as measurement laser, the measurement laser is reflected to the horizontal direction through the first laser reflector 1-2 and then reflected to the vertical direction through the piezoelectric deflection mirror 1-3, the incident laser 1-4 is reflected through the second laser reflector 1-7 to generate reflected laser 1-6, the reflected laser 1-6 and the incident laser 1-4 jointly act on an atom 1-5 in a free falling state after being cooled and confined, the atom 1-5 is controlled to complete beam splitting, reflection and convergence, an interferometry process is completed, and a gravity measurement value is output to the processor 3 through signal acquisition and data processing.
In the present embodiment, the piezoelectric deflection mirror 1-3 uses piezoelectric ceramics, and changes the two-axis angle of the mirror by changing the driving voltage to cause the displacement of the mirror, thereby realizing the two-axis angle adjustment after the incident laser 1-4 is reflected. The piezoelectric deflection mirror 1-3 contains a calibrated angle sensor, the two-axis angle is uploaded to the processor 3, and then the processor can issue instructions to change and set the angle of the piezoelectric deflection mirror 1-3, so that the angle adjustment of the incident laser 1-4 is realized.
In the embodiment, the goniometer 1-8 is fixedly connected with the second laser reflector 1-7, the goniometer 1-8 is fixedly connected with the gravity sensing unit 1, and the gravity sensing unit 1 is fixedly connected with the electric leveling platform 2; the angle measured by the goniometer 1-8 reflects the angle of the reflected laser 1-6 relative to the direction of gravitational acceleration and the angle of the gravity sensitive unit 1 and the electric leveling platform 2 to the horizontal plane; the measuring angle is uploaded to the processor 3, the processor 3 issues instructions, parameters of the electric leveling platform 2 are changed and set, feedback of the angle of the gravity sensing unit 1 is achieved, and adjustment of the posture of the gravity sensing unit 1 is achieved.
The piezoelectric deflection mirror 1-3 is combined with the electric leveling platform 2, so that any angle adjustment of the incident laser 1-4 and the reflected laser 1-6 can be completed. By using an automatic calibration flow, the angles of the piezoelectric deflection mirror 1-3 and the goniometer 1-8 are calibrated, so that the laser wave vector direction is ensured to be parallel to the gravity acceleration direction, and the gravity measurement error caused by the laser direction is restrained as much as possible, so that the gravity measurement accuracy is not limited to the gravity measurement error.
After the system is preheated, a leveling calibration mode is selected, the processor 3 can control the piezoelectric deflection mirror 1-3 and the electric leveling platform 2 to finish the processes of angle adjustment, gravity measurement, measurement result fitting, calibration angle setting and angle adjustment, and the preset calibration values of the angles of the piezoelectric deflection mirror 1-3 and the angle meter 1-8 are calibrated and set again, so that the angles of the piezoelectric deflection mirror 1-3 and the angle meter 1-8 reach the preset calibration values, the requirement that the laser wave vector is parallel to the gravity acceleration direction is met, and one-key quick leveling calibration is realized.
Example 2
The working principle of the automatic calibration method is shown in fig. 3, and when the atomic gravimeter performs gravity measurement, the atomic interferometry phase containing the gravity acceleration is expressed as follows:
the laser wave length of the incident laser 1-4 is similar to that of the reflected laser 1-6, so that the laser wave vector k 1 ≈k 2 ≈k eff 2; whereas α, β≡0 is given by the fact that the gravity sensitive unit 1 is pre-calibrated at the time of installation.
The interference phase can be reduced to ΔΦ= (1- α) 2 /2-β 2 +αβ)k eff gT 2 Wherein the systematic error introduced by measuring the laser direction offset is denoted as ΔΦ tilt ＝(-α 2 /2-β 2 +αβ)k eff gT 2 Since the piezoelectric deflection mirrors 1-3 and the electric leveling platform 2 can independently change the angles of the two axes of the laser, the angle can be expressed as α= (α) x ，α y )，β＝(β x ，β y ) Then the systematic error in the gravitational acceleration measurement is expressed as:
when the laser wave vector direction is calibrated, the alpha is sequentially calibrated x ，α y ，β x ，β y These 4 tilt angles are calibrated by first modulating alpha x Keeping the remaining 3 angles unchanged, the systematic error becomes Δg tilt ＝(-(α x -β x ) 2 /2+C 1 )g。
At alpha x Around a pre-calibrated angle of (a), with a fixed angle difference delta alpha x As a step, the piezoelectric deflection mirrors 1-3 are controlled to make alpha x Sequentially set as alpha x -2Δα x ，α x -Δα x ，α x ，α x +Δα x ，α x +2Δα x And carrying out gravity measurement for a fixed time to obtain corresponding gravity acceleration measurement values g1, g2, g3, g4 and g5. Alpha is alpha x The angle is the horizontal axis, the gravity measurement value is the vertical axis, and the alpha can be obtained by using quadratic function fitting according to the above formula x Is a nominal value alpha of (a) x0 And controls the piezoelectric deflection mirror 1-3 to adjust to the angle.
The same method is adopted to modulate the piezoelectric deflection mirrors 1-3 to obtain alpha y Is a nominal value alpha of (a) y0 The method comprises the steps of carrying out a first treatment on the surface of the The modulation electric leveling platform 2 can obtain the beta corresponding to the measurement of the goniometer 1-8 x And beta y Beta is the nominal value of (2) x0 And beta y0 。
When the angles of the piezoelectric deflection mirror 1-3 and the goniometer 1-8 are adjusted to the calibration value, the direction of the measuring laser wave vector is ensured to be parallel to the direction of the gravitational acceleration, and the calibration function is realized.
The invention discloses an automatic calibration method of an atomic gravimeter, which comprises two steps of automatic leveling and automatic calibration.
S1, an automatic leveling work flow is as follows.
The automatic calibration system is placed, and the preheating is completed after power-on.
The operator selects to start "auto leveling" in the master control program.
The processor 3 controls the piezoelectric deflection mirror 1-3, and the piezoelectric ceramic is utilized to adjust the angle of the piezoelectric deflection mirror 1-3 to a standard value alpha x0 And alpha y0 。
The processor controls the electric leveling platform 2, takes the angles of the goniometers 1-8 as feedback targets, and adjusts the posture of the gravity sensitive unit 1 by utilizing the stepping motor to adjust the angles of the goniometers 1-8 to a calibration value beta x0 And beta y0 。
And finishing automatic leveling.
S2, an automatic calibration workflow is as follows.
The operator chooses to start "auto calibration" in the master control program.
The x-axis angle of the piezoelectric deflection mirror 1-3 is controlled to be within a certain range at two sides of a preset angle, and is sequentially set at different angles at fixed angle intervals to carry out a group of gravity measurement.
Recording the x-axis angle and the gravity measurement value of the piezoelectric deflection mirror 1-3, and fitting to obtain alpha x Is a calibration value alpha of (a) x0 And set to a new preset value. Controlling the piezoelectric deflection mirror 1-3 to adjust the x-axis angle to alpha x0 。
The y-axis angle of the piezoelectric deflection mirror 1-3 is controlled to be within a certain range at two sides of a preset angle, and is sequentially set at different angles at fixed angle intervals to carry out a group of gravity measurement.
Recording the y-axis angle and the gravity measurement value of the piezoelectric deflection mirror 1-3, fitting, and obtaining alpha y Is a calibration value alpha of (a) y0 And set to a new preset value.
Controlling the piezoelectric deflection mirror 1-3 to adjust the y-axis angle to alpha y0 。
The electric leveling platform 2 is controlled, the angles of the goniometers 1-8 are used as target values, the angles of the x-axis are in a certain range on two sides of a preset angle, and the angles are sequentially set at different angles at fixed angle intervals, so that a group of gravity measurement is carried out.
The x-axis angles and gravity measurements of goniometers 1-8 were recorded and fittedObtaining beta x Is a calibration value beta of (2) x0 And set to a new preset value.
Controlling the electric leveling platform 2 to adjust the x-axis angle of the goniometers 1-8 to beta x0 。
The electric leveling platform 2 is controlled, the angles of the goniometers 1-8 are used as target values, the y-axis angles are in a certain range on two sides of the preset angle, and the y-axis angles are sequentially set at different angles at fixed angle intervals to carry out a group of gravity measurement.
Recording the y-axis angle and the gravity measurement value of the goniometer 1-8, fitting, and obtaining beta y Is a calibration value beta of (2) y0 And set to a new preset value.
Controlling the electric leveling platform 2 to adjust the y-axis angle of the goniometers 1-8 to beta y0 。
The automatic calibration is completed.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and some practical embodiments, and variations and modifications may be made by those skilled in the art without departing from the inventive concept, which are all within the scope of the present invention.
Claims (4)
1. An automatic calibration system for an atomic gravimeter, characterized by: the device comprises an electric leveling platform (2) for bearing a gravity sensing unit (1), a processor (3) connected with the electric leveling platform (2), a laser transmitter (1-1), a goniometer (1-8) arranged on the table top of the electric leveling platform (2), a first laser reflector (1-2), a piezoelectric deflection mirror (1-3) and a second laser reflector (1-7) which are sequentially arranged on the emergent light path of the laser transmitter (1-1), wherein the goniometer (1-8) is connected with the gravity sensing unit (1), the second laser reflector (1-7) is fixed on the goniometer (1-8), and the piezoelectric deflection mirror (1-3), the goniometer (1-8) and the electric leveling platform (2) are respectively connected with the processor (3); the laser transmitter (1-1) emits incident laser (1-4), reflects the incident laser to the horizontal direction through the first laser reflector (1-2), reflects the incident laser to the vertical direction through the piezoelectric deflection mirror (1-3), reflects the incident laser through the second laser reflector (1-7) to generate reflected laser (1-6), acts on the atoms (1-5) after cooling and trapping together with the incident laser (1-4), controls the atoms (1-5) to complete beam splitting, reflection and convergence, completes the interferometry process, and outputs a gravity measurement value to the processor (3).
2. An automatic calibration system for atomic gravimeter according to claim 1, wherein the motorized levelling bench (2) adjusts the angle of the table by means of a stepper motor.
3. An automatic calibration system for atomic gravimeter according to claim 1, characterized in that the piezoelectric deflection mirror (1-3) adjusts the angle of the incident laser light (1-4) by means of piezoceramics.
4. A method of calibrating an automatic calibration system according to claim 1, comprising the steps of:
s1, automatic leveling: the processor (3) drives the piezoelectric ceramics to adjust the angle of the piezoelectric deflection mirror (1-3) to a standard value alpha x0 And alpha y0 The method comprises the steps of carrying out a first treatment on the surface of the The processor (3) controls the electric leveling platform (2), takes the angle of the goniometer (1-8) as a feedback target, adjusts the posture of the gravity sensitive unit (1) by utilizing the stepping motor, and adjusts the angle of the goniometer (1-8) to a calibration value beta x0 And beta y0 ；
S2, automatic calibration:
controlling the x-axis angle of the piezoelectric deflection mirror (1-3) to be within a certain range at two sides of a preset angle, sequentially setting at different angles at fixed angle intervals, and carrying out a group of gravity measurement; fitting the angle of the x-axis and the gravity measurement value to obtain alpha x Is a calibration value alpha of (a) x0 Set to a new preset value and adjust the x-axis angle to alpha x0 ；
Controlling the y-axis angle of the piezoelectric deflection mirror (1-3) to be within a certain range on both sides of a preset angle, sequentially setting the angles at different angles at fixed angle intervals, and carrying out a group of gravity measurement; fitting the y-axis angle and the gravity measurement to obtain alpha y Is a calibration value alpha of (a) y0 Set to a new preset value and adjust the y-axis angle to alpha y0 ；
Controlling the electric leveling platform (2) to enable the angle of the x-axis to be within a certain range on two sides of a preset angle, sequentially setting the angles at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the x-axis angle of the goniometer (1-8) and fitting the gravity measurement to obtain beta x Is a calibration value beta of (2) x0 Setting a new preset value and adjusting the x-axis angle of the goniometer (1-8) to beta x0 ；
Controlling the electric leveling platform (2) to enable the y-axis angle to be within a certain range on two sides of a preset angle, sequentially setting the y-axis angle at different angles at fixed angle intervals, and carrying out a group of gravity measurement; recording the y-axis angle of the goniometer (1-8) and fitting the gravity measurement to obtain beta y Is a calibration value beta of (2) y0 Setting a new preset value and adjusting the y-axis angle of the goniometer (1-8) to beta y0 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311657825.6A CN117572518A (en) | 2023-12-04 | 2023-12-04 | Automatic calibration system and method for atomic gravimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311657825.6A CN117572518A (en) | 2023-12-04 | 2023-12-04 | Automatic calibration system and method for atomic gravimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117572518A true CN117572518A (en) | 2024-02-20 |
Family
ID=89889902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311657825.6A Pending CN117572518A (en) | 2023-12-04 | 2023-12-04 | Automatic calibration system and method for atomic gravimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117572518A (en) |
-
2023
- 2023-12-04 CN CN202311657825.6A patent/CN117572518A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5511930A (en) | Precision positioning apparatus | |
| CN108291809B (en) | Method for checking and/or calibrating the vertical axis of a rotating laser | |
| CN109141223B (en) | PSD-based laser interferometer light path efficient and accurate calibration method | |
| US8006398B2 (en) | Method for scanning the surface of a workpiece | |
| US6172373B1 (en) | Stage apparatus with improved positioning capability | |
| CN108291810B (en) | Method for checking a cone error of a rotating laser | |
| EP1239263B1 (en) | Position measuring apparatus and working apparatus using the same | |
| CN111781719B (en) | Built-in measuring device and method for large-caliber large-field telescope system | |
| CN107345795B (en) | Rotary laser for measuring machine tools | |
| US9194698B2 (en) | Geodetic device and a method for determining a characteristic of the device | |
| JP5517062B2 (en) | Normal vector tracking type ultra-precision shape measurement method | |
| CN117572518A (en) | Automatic calibration system and method for atomic gravimeter | |
| CN111707291B (en) | Automatic assembling and calibrating device and automatic assembling and calibrating method for star sensor focal plane | |
| CN100536262C (en) | Automatic Calibration Device of Positive Branch Confocal Unstable Cavity Mirror | |
| CN109373906B (en) | Method for simultaneously measuring distance, pitch and yaw | |
| JP5151788B2 (en) | Normal vector tracking type ultra-precision shape measurement method using optical path length autonomous calibration | |
| US11473904B2 (en) | Measurement probe | |
| CN213657805U (en) | Calibration system | |
| CN106767546A (en) | Two dimension angular sensor with structure thermal stability higher | |
| Rerucha et al. | Laser-interferometric nanometre comparator for length gauge calibration in advanced manufacturing | |
| Flugge et al. | Recent activities at PTB nanometer comparator | |
| JP2010038792A (en) | Method for controlling drive shaft in super-precision shape measurement device of normal vector tracking type | |
| JPH0382013A (en) | Control method of positioning of stage | |
| CN114562991B (en) | Relativistic astronomical effect navigator based on star sensor assistance and navigation method thereof | |
| US20240272197A1 (en) | Method and device for interference variable compensation during the positioning of a sample support |
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 |