High-precision magnetic suspension relative gravimeter, control method and application

Abstract

The invention belongs to the technical field of gravimeters, and discloses a high-precision magnetic suspension relative gravimeter, a control method and application, a magnetic-gravity potential well adopted by the control method of the high-precision magnetic suspension relative gravimeter is realized based on a permanent magnet combination mode, and an anti-magnetic suspension mechanical system is used as a gravity sensitive device, the anti-magnetic suspension is to realize the suspension of the mass body by utilizing the anti-magnetic interaction generated by the spinning magnetic moment in the anti-magnetic material. The gravimeter based on the anti-magnetic suspension system is different from an existing method in the physical principle and is a complete principle innovation. Most importantly, compared with the prior art, the method has the advantages of being capable of working at room temperature, small in size, high in precision and high in stability, other gravimeters cannot have the advantages at the same time at present, and therefore the method has clear advantages in gravity measurement scenes with high requirements for the indexes in the future. The anti-magnetic suspension is completely passive suspension, has very high parameter stability in principle, and realizes low drift.

Description

technical field [0001] The invention belongs to the technical field of gravimeters, and in particular relates to a high-precision magnetic suspension relative gravimeter, a control method and an application. Background technique [0002] At present: high-precision gravimeter is the core equipment in energy exploration, earthquake early warning, groundwater resource monitoring, underwater passive navigation, military target recognition and other application fields. At present, the existing gravimeter can be divided into two categories, absolute gravimeter and relative gravity meter. Absolute gravimeters measure the absolute value of the gravitational field. Representative technologies include free-fall gravimeters, cold atom gravimeters, etc., and can achieve high precision (10-9g). However, limited by physical principles, the volume of absolute gravimeters Large and heavy, it will be difficult to achieve portable use in the future. On the other hand, the relative gravimete...

AI Technical Summary

Problems solved by technology

[0006] At the same time, the suspension system can also maintain the measurement accuracy, but because the magnetic force of the diamagnetic material is much weaker than that of superconducting materials, it puts forward very high requirements for the magnetic potential well. The magnetic potential well must not only have a strong enough magnetic field, but also There must be a strong enough magnetic field gradient, and the purpose of the present invention is miniaturization, so the superconducting magnet with huge volume cannot be used, and only permanent magnets can be used. Therefore, the design and manufacture of permanent magnets are the main technical difficulties. In addition, how to reduce The frequency of magnetic levitation, so as to improve the gravity response coefficient is also the main difficulty

[0007] The significance of solving the above problems and defects is: the superconducting relative gravimeter must be low temperature in principle, and the low temperature equipment occupies most of the volume and weight of the gravimeter. For example, the single price of the existing superconducting gravimeter exceeds 10 million. The weight exceeds 300kg. On the one hand, it is very expensive and not conducive to popularization. On the other hand, it is difficult to use in the field, ships, aircrafts and other complex conditions. The anti-magnetic levitation adopted by the core of the invention can work at room temperature, which means realizing small volume and Portable and cost-effective, it has practical application and commercial value

Images