Absolute gravity measurement method and absolute gravimeter
A technology of gravity measurement and measurement components, which is applied in the field of absolute gravity measurement methods and absolute gravity meters, and can solve the problems of single absolute gravity measurement principle and the like.
Active Publication Date: 2021-01-12
PEKING UNIV
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[0004] Aiming at the problem that the principle of absolute gravity measurement is relatively single at present, the purpose of the present invention is to provide an absolute gravity measurement method, which adopts an absolute gravity measurement principle different from the principle of free fall
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[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0048] Representative examples of sensors based on this absolute gravimetric measurement principle are attached Figure 4 shown. Among them, the translation motion sensor (type includes displacement sensor, speed sensor, acceleration sensor, jerk sensor, etc.), rotation motion sensor (type includes angle sensor, angular velocity sensor, angular acceleration sensor, etc.) is fixed on the fixed frame, fixed The frame is fixed to the ground. There are naturally existing translational seismic waves on the ground, artificial or various equipment-induced translational seismic waves, etc., which are the source of the frame’s translational motion, and naturally occurring rotational seismic waves, artificial or various types of equipment-induced rotational seismic waves, etc., are the frame’s rotation source of movement. as attached image 3 As shown, the correspo...
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The invention discloses an absolute gravity measurement method and an absolute gravimeter. The measuring method comprises the following steps: 1) arranging a translational motion measuring element anda rotational motion measuring element at a position to be measured; 2) measuring by using the translational motion measuring element to obtain a relative displacement d generated by translational motion at the to-be-measured position, and measuring by using the rotational motion measuring element to obtain a rotational angle theta generated by rotational motion of a sensitive shaft of the translational motion measuring element; 3) determining the absolute gravitational acceleration g of the position to be measured according to a formula, wherein f is the observation frequency. According to the method, absolute gravity can be directly observed from natural seismic waves, so that an active or passive vibration isolation device is not needed, simultaneous observation of earthquakes and gravity can be realized, and implementation of geophysical joint exploration is facilitated; theoretically, along with the reduction of the observation frequency, the observation precision of the absolutegravity is increased according to the square relation, and the improvement of the absolute gravity observation precision is facilitated.
Description
technical field [0001] The invention relates to an absolute gravity measurement method and an absolute gravimeter, which can be used in the observation category of absolute gravity acceleration, such as the monitoring of the earth's gravity field, geodesy, geodynamics research, density body and abnormal monitoring and monitoring, building anti-seismic experiments, mineral resources Development, geophysical exploration, earthquake and geological disaster early warning and other engineering and scientific research fields. Background technique [0002] All objects on the earth will affect the acceleration of gravity (hereinafter referred to as "gravity" is equivalent to "acceleration of gravity"). According to research, the influence of mountains and rivers on the surface and trenches at the bottom of the ocean on gravity is the third decimal place, And the impact of large buildings on gravity is the 7th. Therefore, improving the accuracy of gravity measurement can greatly imp...
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Login to View More IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 陈彦钧曾卫益阳春霞李正斌
Owner PEKING UNIV