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Double-vacuum cavity type fall control absolute gravity meter and application method

An absolute gravimeter and double vacuum technology, which can be used in instruments, scientific instruments, measuring gravitational fields, etc., can solve the problems of measurement results accuracy influence, strong vibration, etc., and achieve the effect of reducing design difficulty, small vibration, and reducing measurement error.

Inactive Publication Date: 2014-07-23
ZHEJIANG UNIV
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Problems solved by technology

The high-speed operation and reverse rotation of the motor will also generate strong vibration, which will be transmitted to the measurement system through the ground, which will have a greater impact on the accuracy of the measurement results

Method used

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  • Double-vacuum cavity type fall control absolute gravity meter and application method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like figure 1 As shown, the present invention includes a horizontal base 1 , a double vacuum chamber drop control system 2 , a laser interference system 3 , a vibration isolation system 4 , a rubidium atomic clock 5 and a host computer 6 .

[0024] The horizontal base 1 includes a support platform 10, 3 identical pillars 11 and a level adjuster 12 arranged under each pillar.

[0025] The double vacuum chamber drop control system 2 is placed on the support platform 10 and includes a large vacuum chamber 20 and a small vacuum chamber 21, both of which are cylindrical cavities made of non-magnetic materials, which can effectively shield electromagnetic interference during the measurement process. A see-through window mirror 23 is arranged at the lower part of the large vacuum chamber shell 22, so that the measuring laser beam can pass up and down. The ion pump 24...

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Abstract

The invention discloses a double-vacuum cavity type fall control absolute gravity meter and an application method. The double-vacuum cavity type fall control absolute gravity meter comprises a horizontal substrate, a double-vacuum cavity fall control system, a laser interference system, a vibration isolating system, a rubidium atomic clock and an upper computer, wherein the double-vacuum cavity fall control system is located on the horizontal substrate, the laser interference system is located under the horizontal substrate, and the vibration isolating system is located under the laser interference system. According to the double-vacuum cavity type fall control absolute gravity meter, a fall prism is located in a small vacuum cavity, the vacuum degree can be lower than 10-6 Pa, the remnant molecule resistance is reduced, and the measurement error is lowered. A fall control power source linear ultrasonic motor is small in volume, precision in location, small in vibration and capable of effectively reducing the volume of the vacuum cavity and lowering the vacuum cavity design difficulty and vacuum degree maintaining cost, and moreover, the vibration is smaller when the linear ultrasonic motor jacks up the falling body towards the upside and releases the falling body towards the downside, and the measurement error caused by vibration is effectively reduced.

Description

technical field [0001] The invention relates to a testing device, in particular to a double vacuum chamber type falling body control absolute gravity testing device and an application method. Background technique [0002] The gravity field is the basic geophysical field that reflects the internal material structure and changes of the earth. The high-precision absolute gravity observation data is the basis for earthquake monitoring and forecasting, earth science research, resource exploration and other fields, as well as national precision measurement, aircraft navigation and missile guidance. Indispensable strategic data. Absolute gravimeter is the main precision measuring instrument used to directly measure the value of gravitational acceleration and its change, and its research is highly valued by domestic and foreign researchers. [0003] At present, the mature absolute gravimeters in the world mainly use laser interference technology to accurately measure the trajectory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/14
Inventor 黄腾超庞斌贺青舒晓武刘承
Owner ZHEJIANG UNIV
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