Auxiliary device for evaluating Coriolis force of atom interferometer
By designing auxiliary devices for the lifting and rotating support module and the tilt detection and adjustment module, the problems of long rotation time and difficulty in controlling accuracy of vacuum containers are solved, realizing rapid and accurate Coriolis force evaluation, which is applicable to atomic interferometers and portable atomic interferometers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAZHONG UNIV OF SCI & TECH
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-08
AI Technical Summary
In existing methods for evaluating Coriolis force by rotating a vacuum container, the rotation time is too long and the rotation accuracy is difficult to control, resulting in large errors in the evaluation results.
Design an auxiliary device including a lifting and rotating support module and a tilt detection and adjustment module. The tilt detection unit detects the tilt of the vacuum container, and the tilt adjustment unit adjusts its levelness. Combined with the lifting and rotating support module, the vacuum container is driven to rotate, so as to achieve rapid and accurate Coriolis force assessment.
It greatly shortens the time of rotating the vacuum container, and can complete the compensation and evaluation of systematic errors within 1 minute, with an angular error of no more than 1%, thus improving the accuracy of experimental results. It is suitable for atomic interferometers and portable atomic interferometers.
Smart Images
Figure CN224216889U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of atomic inertial measurement, and more specifically, relates to an auxiliary device for evaluating the Coriolis force of an atomic interferometer. Background Technology
[0002] Atomic interferometry has seen rapid development and widespread application in recent years, for example, in measuring gravitational acceleration g, gravitational gradient, fine-structure constant, and Newton's gravitational constant. Atomic interferometry is also used in fundamental physics to test the equivalence principle and Lorentz lapse, and to measure gravitational waves. The accuracy of an atomic interferometer depends on the assessment of systematic errors, among which the Coriolis force effect caused by the coupling of the Earth's rotation and the east-west velocity of atomic clusters is a significant systematic error. The Coriolis force in an atomic interferometer is typically measured differentially by rotating a horizontal vacuum container to obtain the contribution of the Coriolis effect. This method can differentiate all errors except for the Coriolis effect and is a relatively reliable assessment method.
[0003] However, existing devices and methods for evaluating the Coriolis force using vacuum container rotation have very long rotation times. For example, in the 2011 paper "Anne Louchet-Chauvet et al., The influence of transversemotion within an atomic gravimeter. New J. Phys. 13 065025(2011)" published by the Paris Observatory, the rotation time reached 2 hours. Furthermore, the rotational accuracy of the rotating device used is difficult to control, resulting in large deviations and thus significant errors in the evaluation of the Coriolis force. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide an auxiliary device for evaluating the Coriolis force of an atomic interferometer, which aims to solve the problem of inaccurate Coriolis force evaluation results caused by the excessively long rotation time and difficulty in controlling the rotation accuracy of the existing vacuum container.
[0005] To achieve the above objectives, this application provides an auxiliary device for evaluating the Coriolis force of an atomic interferometer, comprising a lifting and rotating support module and a tilt detection and adjustment module, wherein: the tilt detection and adjustment module includes a tilt detection unit and a tilt adjustment unit; the tilt detection unit is used to detect the tilt of the vacuum container in the atomic interferometer; the tilt adjustment unit is located at the bottom of the vacuum container, used to support the vacuum container and adjust the level of the vacuum container; the lifting and rotating support module can be coaxially arranged directly below the vacuum container and can drive the vacuum container to rotate.
[0006] Furthermore, the lifting and rotating support module includes a support plate, a support structure, and a chassis that are coaxially arranged and connected in sequence. The support structure is a hydraulic lifting rod. A bearing is provided at the center of the support plate. One end of the hydraulic lifting rod passes through the bearing, and the other end is connected to the center of the chassis. The hydraulic lifting rod can rotate relative to the chassis around its central axis.
[0007] Furthermore, a first connecting hole is provided at the center of the chassis, and a second connecting hole is provided at the center of the other end of the hydraulic lifting rod. The first connecting hole and the second connecting hole are connected by a rotating shaft after being aligned.
[0008] Furthermore, the bearing is a trapezoidal bearing.
[0009] Furthermore, a first rotation mark is provided on the support plate, and a second rotation mark is provided on the chassis. Before the hydraulic lifting rod drives the support plate to rotate, the included angle between the first rotation mark and the second rotation mark is 180°.
[0010] Furthermore, before and after the hydraulic lifting rod drives the support plate to rotate, the angular error between the first rotation mark and the second rotation mark does not exceed 1%.
[0011] Furthermore, the lifting and rotating support module is provided with a connecting positioning shaft on the side facing the bottom of the vacuum container, the tilt adjustment unit is fixed on a support plate, and the support plate is provided with a connecting hole corresponding to the connecting positioning shaft, the connecting positioning shaft can be aligned and inserted into the connecting hole for fixation.
[0012] Furthermore, the tilt detection unit is located beside the vacuum container and is on the same plane as the vacuum container.
[0013] Furthermore, the support plate and the chassis are discs of the same size.
[0014] Overall, the technical solutions conceived in this application have the following beneficial effects compared with the prior art:
[0015] (1) Compared with the existing rotating container method, the auxiliary device designed in this application greatly shortens the time required for rotating the vacuum container, and can quickly realize the compensation and evaluation of the Coriolis force in the system error, thereby giving the uncertainty.
[0016] (2) In this application, the lifting and rotating support module and the tilt detection and adjustment module are used independently. The tilt detection unit in the tilt detection and adjustment module detects the tilt of the vacuum container. The tilt adjustment unit is set directly below the vacuum container to support the vacuum container and adjusts the level of the vacuum container according to the tilt. When the vacuum container needs to be rotated, the height of the lifting and rotating support module is adjusted so that it is set in the space at any height directly below the vacuum container. The lifting and rotating support module has the function of driving the vacuum container to rotate on its plane, thereby realizing the effect of quickly adjusting the rotating vacuum container to modulate the Coriolis force.
[0017] (3) This application is applicable to all atomic interferometers and portable atomic interferometers, simplifying the experimental procedure and reducing the experimental time; this application can achieve a precise 180° rotation of the vacuum container, avoiding systematic errors caused by observing the angle with the naked eye during rotation; at the same time, through the rotation mark on the auxiliary device, the angle error before and after the vacuum container is rotated does not exceed 1%, and the experimental results are more accurate; at the same time, this application is a good experimental auxiliary tool for atomic interferometers applied to fields such as resource exploration and gravity-assisted navigation, providing better technical support for achieving rapid measurement of g value. Attached Figure Description
[0018] Figure 1 This is a partial structural schematic diagram of an auxiliary device for evaluating the Coriolis force of an atomic interferometer, provided in an embodiment of this application.
[0019] Figure 2 This is a partial cross-sectional schematic diagram of an auxiliary device for evaluating the Coriolis force of an atomic interferometer, provided in an embodiment of this application.
[0020] Figure 3 This is a partial three-dimensional cross-sectional schematic diagram of an auxiliary device for evaluating the Coriolis force of an atomic interferometer, provided in an embodiment of this application.
[0021] Figure 4 This is an assembly diagram of an auxiliary device for evaluating the Coriolis force of an atomic interferometer, provided in an embodiment of this application.
[0022] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:
[0023] 1-Support plate, 11-First rotation mark, 2-Support structure, 21-Second connecting hole, 3-Base, 31-First connecting hole, 32-Second rotation mark, 4-Bearing, 5-Connecting positioning shaft, 6-Support plate, 7-Vacuum container, 8-Tilting detection unit, 9-Tilting adjustment unit. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0025] In this article, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The symbol " / " in this article indicates that the related objects are in an "or" relationship; for example, A / B means A or B.
[0026] The terms "first" and "second," etc., used in the specification and claims herein are used to distinguish different objects, not to describe a specific order of objects. For example, "first response message" and "second response message," etc., are used to distinguish different response messages, not to describe a specific order of response messages.
[0027] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0028] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more, for example, multiple processing units means two or more processing units, multiple elements means two or more elements, etc.
[0029] The embodiments of this application are described below with reference to the accompanying drawings.
[0030] This embodiment provides an auxiliary device for evaluating the Coriolis force of an atomic interferometer, including a lifting and rotating support module and a tilt detection and adjustment module, wherein: the tilt detection and adjustment module includes a tilt detection unit 8 and a tilt adjustment unit 9; the tilt detection unit is used to detect the tilt of the vacuum container; the tilt adjustment unit 9 is located at the bottom of the vacuum container, used to support the vacuum container, and adjusts the vacuum container to a horizontal position according to the tilt; the lifting and rotating support module can be coaxially arranged directly below the vacuum container of the atomic interferometer, and can drive the vacuum container to rotate to modulate the Coriolis force.
[0031] like Figure 1-3As shown, the aforementioned lifting and rotating support module includes a support plate 1, a support structure 2, and a chassis 3 that are coaxially arranged and connected in sequence. The support plate 1 is located directly below the vacuum container and is connected to it. The support structure 2 is a hydraulic lifting rod. A bearing 4 is provided at the center of the support plate 1. One end of the hydraulic lifting rod passes through the bearing 4, and the other end is connected to the center of the chassis 3. The hydraulic lifting rod can rotate around its central axis, thereby driving the support plate 1 to rotate relative to the chassis 3.
[0032] In this embodiment, the chassis 3 has a first connecting hole 31 at its center, and the other end of the hydraulic lifting rod has a second connecting hole 21 at its center. The first connecting hole 31 and the second connecting hole 21 are aligned and connected by a rotating shaft.
[0033] Specifically, the support plate 1 can be made of high-strength alloy steel (such as 42CrMo), with nitriding treatment to enhance wear resistance, or it can be made of corrosion-resistant stainless steel 316L suitable for clean environments, or it can be made of forged aluminum alloy 7075-T6, which is lightweight while having a stronger load-bearing capacity of over 300kg.
[0034] The aforementioned bearing 4 is a trapezoidal bearing, which can ensure that it can bear a load of more than 200 kg, making the overall device more stable. Specifically, a stepped bearing mounting countersunk hole is provided at the center of the bottom surface of the support plate 1, and the bearing 4 is installed in the stepped countersunk hole, with adjustable preload.
[0035] A first rotation mark 11 is provided on the aforementioned support plate 1 (specifically on the lower surface of the support plate 1), and a second rotation mark 32 is provided on the chassis 3 (specifically on the upper surface of the chassis 3). Before the hydraulic lifting rod drives the support plate 1 to rotate, the included angle between the first rotation mark 11 and the second rotation mark 32 is 180°.
[0036] Specifically, the first rotation mark 11 and the second rotation mark 32 can both be laser-etched arrows, crosshairs, or other shapes (accuracy ±0.05mm), and their positions can be embedded in the grooves on the edge of the disk.
[0037] Before and after the aforementioned hydraulic lifting rod drives the support plate 1 to rotate, the angular error between the first rotation mark 11 and the second rotation mark 32 does not exceed 1%.
[0038] The aforementioned hydraulic lifting rod can be a multi-stage telescopic cylinder with a 3-stage stroke, a stroke of 500mm, and a rated thrust of 5 tons; or a servo electric cylinder with a rotation accuracy of ±0.1°.
[0039] Specifically, the hydraulic lifting rod integrates a ball screw pair (10mm lead) inside the rod body to achieve lifting, while an external sleeve mounts a crossed roller bearing (such as the INA YRT series) to transmit torque. The bottom end of the hydraulic lifting rod is connected to a cycloidal hydraulic motor with a displacement of approximately 80mL / r, or it can be connected to a stepper motor with a 1.8° step angle, thus enabling the rotation of the support plate 1. The hydraulic lifting rod's oil circuit has a built-in overflow valve for overload protection, and automatically triggers a wedge locking block to lock after the rod has been raised to the appropriate position.
[0040] In the aforementioned lifting and rotating support module, a connecting positioning shaft 5 is provided on the side of the support plate 1 facing the bottom of the vacuum container. The tilt adjustment unit 9 includes multiple units, which are evenly arranged at the bottom of the vacuum container 7. Each tilt adjustment unit 9 is fixed on a support plate 6. The support plate 6 has a connecting hole corresponding to the connecting positioning shaft 5, and the connecting positioning shaft 5 can be aligned and inserted into the connecting hole for fixation.
[0041] like Figure 4 As shown, the aforementioned tilt detection unit 8 is located beside the vacuum container 7 and is on the same plane as the vacuum container 7. Specifically, the atomic interferometer is arranged on a movable trailer. The figure only shows the relative positions of the vacuum container, auxiliary device, and tilt detection unit 8. The vacuum container 7 is fixed to the trailer plate (i.e., the aforementioned support plate 6). The auxiliary device is located directly below the vacuum container and supported at the bottom of the trailer. It can raise and lower the entire trailer and drive the trailer to rotate the vacuum container 7 on it by 180° around the support structure 2.
[0042] The aforementioned support plate 1 and base plate 3 are circular plates of the same size, and their materials and thicknesses can also be the same.
[0043] The aforementioned tilt detection unit 8 can be a high-precision dual-axis inclinometer with a range of ±10° and a resolution of 0.001°. It can also transmit detection data to an external controller wirelessly, such as using Bluetooth technology.
[0044] The aforementioned tilt adjustment unit 9 includes multiple height-adjustable support legs, which are evenly arranged below the vacuum container to support it. Specifically, the support legs can consist of a base and an electric lifting rod. An external controller can control the motor connected to each support leg to drive the electric lifting rod of the corresponding support leg to achieve lifting and lowering, thereby realizing automatic adjustment of the vacuum container height.
[0045] In summary, compared with existing rotating vacuum container methods, the auxiliary device of this application significantly reduces the time required for rotating the vacuum container, completing the process in as little as one minute. This enables rapid compensation and evaluation of the Coriolis force in systematic errors, thereby providing the uncertainty. This application serves as an excellent auxiliary tool for atomic interferometric gravimeters in fields such as resource exploration and gravity-assisted navigation, providing necessary technical support for future rapid measurement of g values.
[0046] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.
[0047] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.
[0048] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0049] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.
[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An auxiliary device for evaluating the Coriolis force in an atomic interferometer, characterized in that, It includes a lifting and rotating support module and a tilt detection and adjustment module, wherein: the tilt detection and adjustment module includes a tilt detection unit (8) and a tilt adjustment unit (9); the tilt detection unit (8) is used to detect the tilt of the vacuum container in the atomic interferometer; the tilt adjustment unit (9) is located at the bottom of the vacuum container and is used to support the vacuum container and adjust the level of the vacuum container; the lifting and rotating support module is coaxially arranged directly below the vacuum container and can drive the vacuum container to rotate.
2. The auxiliary device as described in claim 1, characterized in that, The lifting and rotating support module includes a support plate (1), a support structure (2), and a chassis (3) that are coaxially arranged and connected in sequence. The support plate (1) is located directly below the vacuum container and is connected to it. The support structure (2) is a hydraulic lifting rod. A bearing (4) is provided at the center of the support plate (1). One end of the hydraulic lifting rod passes through the bearing (4), and the other end is connected to the center of the chassis (3). The hydraulic lifting rod can rotate around its central axis, thereby driving the support plate (1) to rotate relative to the chassis (3).
3. The auxiliary device as described in claim 2, characterized in that, The chassis (3) has a first connecting hole (31) at its center, and the other end of the hydraulic lifting rod has a second connecting hole (21) at its center. The first connecting hole (31) and the second connecting hole (21) are connected by a rotating shaft after being aligned.
4. The auxiliary device as described in claim 2, characterized in that, The bearing (4) is a trapezoidal bearing.
5. The auxiliary device as described in claim 2, characterized in that, The support plate (1) is provided with a first rotation mark (11), and the chassis (3) is provided with a second rotation mark (32). Before the hydraulic lifting rod drives the support plate (1) to rotate, the included angle between the first rotation mark (11) and the second rotation mark (32) is 180°.
6. The auxiliary device as described in claim 5, characterized in that, Before and after the hydraulic lifting rod drives the support plate (1) to rotate, the angular error between the first rotation mark (11) and the second rotation mark (32) does not exceed 1%.
7. The auxiliary device as described in claim 1, characterized in that, The lifting and rotating support module is provided with a connecting positioning shaft (5) on one side facing the bottom of the vacuum container. The tilt adjustment unit (9) is fixed on a support plate (6). The support plate (6) is provided with a connecting hole corresponding to the connecting positioning shaft (5). The connecting positioning shaft (5) can be aligned and inserted into the connecting hole for fixation.
8. The auxiliary device as described in claim 1, characterized in that, The tilt detection unit (8) is located on the side of the vacuum container and is on the same plane as the vacuum container.
9. The auxiliary device as described in claim 2, characterized in that, The support plate (1) and the base plate (3) are discs of the same size.