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A miniaturized absolute gravimeter based on micro-nano chip

A chip and micro-nano technology, applied in instruments, scientific instruments, measuring gravitational field, etc., can solve problems such as application restrictions, and achieve the effect of reducing environmental restrictions and reducing volume

Active Publication Date: 2021-12-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the application of the existing gravimeter is subject to certain restrictions.

Method used

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  • A miniaturized absolute gravimeter based on micro-nano chip
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  • A miniaturized absolute gravimeter based on micro-nano chip

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Embodiment Construction

[0014] The present invention will be described in further detail below

[0015] Please also see figure 1 ,in figure 1 It is a structural diagram of a micro-nano chip gravity measurement device, and the device includes a 980nm laser 1, an optical fiber isolator 2, a wavelength division multiplexer 3, a micro-nano chip 4, a 1550nm laser 5, an optical fiber circulator 6, and a photodetector 7. A / D converter 8, FPGA chip 9, single-mode optical fiber 10, polystyrene ball 11, capillary 12 and electric injector 13.

[0016] Please also see figure 2 ,in figure 2 It is the structure diagram of the microfluidic chip. The device measurement is divided into three steps, as follows:

[0017] Step 1: output a stable sequence of polystyrene beads 11, and the electric injector 13 injects polystyrene beads 11 into the horizontal channel of the micro-nano chip 4 at a certain flow rate through the control program. At this time, at the level of the micro-nano chip 4 There are 11 sequences...

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Abstract

A miniaturized absolute gravimeter based on a micro-nano chip. The invention relates to the field of absolute gravity measurement. The engineering application requirements of gravity measurement. A miniaturized absolute gravimeter based on a micro-nano chip, including a 980nm laser, an optical fiber isolator, a wavelength division multiplexer, a micro-nano chip, a 1550nm laser, an optical fiber circulator, a photodetector, an A / D converter, and an FPGA chip , single-mode fiber optics, polystyrene beads, capillaries, and power injectors. The stable polystyrene bead sequence is output through the electric injector, and the polystyrene bead is captured and emitted by the 980nm laser, and then the local absolute gravity value is measured by the 1550nm laser interference effect. The present invention realizes gravity measurement through the combination of micro-nano chip and optical fiber optical path, its volume and power consumption are greatly reduced, and it can be applied to the application scene of absolute gravity measurement with limited volume.

Description

technical field [0001] The invention belongs to the field of absolute gravity measurement, in particular to a miniaturized absolute gravity meter based on a micro-nano chip. Background technique [0002] Precise gravitational acceleration measurement has applications in many fields, such as geophysics, metrology, inertial navigation and positioning, resource exploration, scientific research, etc. The distribution of the earth's gravity field can reflect the distribution of material density inside the earth, and has a great impact on geological structures, earth The shape, the modeling of the Earth's rotation, etc. have important implications. The calculation of the geoid requires accurate knowledge of the gravity data of multiple gravity base stations around the world, and also requires local airborne gravity measurement data as a supplement. Long-term gravity monitoring near volcanoes and earthquake-prone areas can help predict the movement trend of the earth's crust to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/00G01V7/02G01P15/093
CPCG01V7/00G01V7/02G01P15/093
Inventor 张亚夏秀玮高伟刘超于飞王岩岩
Owner HARBIN INST OF TECH
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