Quantum absolute gravimeter and its probe
An absolute gravimeter and quantum technology, applied in the direction of measuring gravitational fields, instruments, measuring devices, etc., can solve the problems of complex production, high cost, difficult processing, etc., and achieve the effect of movable structure, compact structure and good market prospects
Active Publication Date: 2022-06-21
杭州微伽量子科技有限公司
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Problems solved by technology
Although the system can guarantee the measurement accuracy, the entire system is too large. The structure of two-dimensional magneto-optical trap + three-dimensional magneto-optical trap leads to complex auxiliary cooling optical paths, and many laser collimation systems are introduced.
The three-dimensional magneto-optical trap component is a tetradecahedron formed by cutting off eight vertices from a cube, and holes are opened on each face of the tetradecahedron, which is complicated to manufacture and difficult to process
Among them, the structure of the titanium alloy vacuum chamber is reliable, but it is not easy to process and has a small light-transmitting area; the quartz glass vacuum chamber is easy to miniaturize, but it is expensive, easy to damage, and difficult to bake at high temperature
Most research units at home and abroad are still in the stage of laboratory measurement for the design of the quantum absolute gravimeter probe. The entire vacuum system and supporting optical path are complex in structure, bulky, and expensive, and are not suitable for mobile measurement.
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[0074] As a preferred embodiment, the first optical window 111 and the second optical window 112 both include windows 1112 , and the windows 1112 are hermetically fixed on the sidewall of the titanium alloy cavity 11 .
[0075] As a preferred implementation, such as Image 6 As shown, the side wall of the titanium alloy cavity 11 defines a stepped hole 116, the inner side of the stepped hole 116 is a long hole type, and the outer side forms a stepped groove 117 that expands toward the edge and is adapted to the shape of the window sheet 1112. The sheet 1112 is embedded in the stepped groove 117 .
[0076] As a preferred implementation, see Image 6 , the sealing assembly structure between the window 1112 and the stepped hole 116 includes an indium wire 1111, a gasket 1113 and a cover plate 1114 from the inside to the outside, wherein the indium wire 1111, the gasket 1113 and the cover plate 1114 are all In a ring shape, the indium wire 1111 is attached to the surface of the ...
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The invention discloses a quantum absolute gravimeter and a probe thereof. The probe includes a measuring part and a support frame; the measuring part includes an ultra-high vacuum unit for trapping atoms and providing free-fall space for them. The periphery of the unit is equipped with an optical path structure that is connected with the laser system and guides to generate multiple laser beams, and a magnetic field unit that cooperates with the optical path structure to generate a three-dimensional magneto-optical trap for cooling and trapping atoms; the top and side walls of the ultra-high vacuum unit and the bottom are all defined with optical windows for injecting the necessary laser beams for absolute gravity measurement; , the magnetic field unit is arranged on the middle support member, and through holes are formed on the upper, middle and lower support members. The present invention is relatively light and handy, compact in structure, and has the characteristics of being mobile and commercialized.
Description
technical field [0001] The invention relates to an absolute gravity measuring device, in particular to a quantum absolute gravimeter and a probe thereof. Background technique [0002] High-precision gravity measuring instruments can be used in oil and gas census, mineral resource exploration, geological survey, environmental monitoring, geophysics and other fields, and the application prospect is very broad. According to different measurement methods, gravity measurement can be divided into absolute gravity measurement and relative gravity measurement. Absolute gravity measurement is to determine the absolute gravity value of a specific position in the earth's gravity field, and relative gravity measurement is to determine the gravity difference between two specific points in the earth's gravity field. Absolute gravity measurement generally adopts the dynamic method. Two methods are mainly used: one is to observe the motion of free fall, which is the method used by G. Gali...
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IPC IPC(8): G01V7/14
CPCG01V7/14
Inventor 杨秋海郭彬罗顺烨周顺吴彬程冰
Owner 杭州微伽量子科技有限公司