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Absolute gravity measurement system and measurement method

A technology of gravity measurement and measurement device, applied in the field of precision instruments, can solve the problems of vacuum leakage and limited volume reduction, achieve the effects of high mobility and reliability, improve convenience and reliability, and simplify the absolute gravity measurement system

Pending Publication Date: 2017-09-01
TSINGHUA UNIV
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Problems solved by technology

Although the above-mentioned A-10 portable absolute gravimeter is smaller than other gravimeters, because it still uses the traditional structure, the volume reduction is limited, and an ion pump is still needed to maintain the vacuum during transportation. In emergencies such as power outages, there is a risk of vacuum leakage

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  • Absolute gravity measurement system and measurement method
  • Absolute gravity measurement system and measurement method
  • Absolute gravity measurement system and measurement method

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Embodiment Construction

[0095] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0096] See figure 1 , an embodiment of the present invention provides an absolute gravity measurement system 100 for measuring absolute gravity values ​​at different locations on the earth. The absolute gravity measurement system 100 includes a free fall device 10 , a vibration isolation platform 20 , a laser interferometry device 30 , a vacuum chamber displacement measurement device 120 and an air refractive index measurement device 130 .

[0097] The free fall device 10 is arranged on the vibration isolation platform 20 for realizing the free fall movement of the falling body 112 . The free fal...

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Abstract

The invention provides an absolute gravity measurement system and a measurement method. The absolute gravity measurement system comprises a free fall device, a laser interference measurement device and an isolation platform. The free fall device comprises a casing body, a vacuum bin arranged in the casing body, and a power device in transmission connection with the vacuum bin. The power device is used to control the movement of the vacuum bin in the vertical direction. The faller is arranged in the vacuum bin. The bottom of the vacuum bin is provided with a vacuum bin observation window which is used for observing the free fall movement of the faller. The absolute gravity measurement system further comprises a vacuum bin displacement measurement device arranged within the casing body. The vacuum bin displacement measurement device comprises a grating scale which is arranged in the casing body and a reading head which is fixedly arranged on the casing body of the vacuum bin. The absolute gravity measurement system further comprises an air refractive index measurement device which is used for measuring the air refractive index inside the casing body.

Description

technical field [0001] The invention relates to the technical field of precision instruments, in particular to an absolute gravity measurement system and a measurement method. Background technique [0002] Absolute gravimeter is an instrument that calculates the absolute value of gravitational acceleration by measuring the response of sensitive elements to the gravitational field. It undertakes important measurement tasks in the fields of metrology, surveying and mapping, seismic, geophysics, resource exploration and auxiliary navigation. Absolute gravimeters can be divided into two categories according to the linearity of sensitive components: one is the classic free fall absolute gravimeter, which uses the laser wavelength as the reference reference for length measurement, the atomic clock frequency as the reference reference for time measurement, and the angular reflective prism as the sensitive element , using a Mach-Zehnder type laser interferometer to measure the displ...

Claims

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Application Information

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IPC IPC(8): G01V7/14
CPCG01V7/14
Inventor 王力军伍康要佳敏李哲
Owner TSINGHUA UNIV
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