Differential acceleration sensing device based on NV color center solid spinning

Abstract

The invention provides a differential acceleration sensing device based on NV color center solid spinning. The device comprises a symmetrical structure, NV color center sensing modules and a detection module, wherein the symmetrical structure comprises a magnetic source, an elastic beam and a symmetrical substrate, and the two NV color center sensing modules are fixed to the surfaces, perpendicular to the z axis, of protruding parts on the two sides of the symmetrical substrate respectively. According to the working principle, under the action of external acceleration, the elastic beam in the symmetrical structures deform to convert acceleration into three-axis displacement variation of the magnetic source along the x axis, the y axis and the z axis, then a magnetic field at the NV color center sensing module is influenced, the NV color center electron spinning energy level is changed, polarization and control of spinning of the NV color center are achieved through laser and microwaves of the detection module, magnetic field information is solved by reading double-path fluorescence signals released by the NV color center, and differential measurement of acceleration is achieved. According to the invention, the advantage of high sensitivity of NV color center magnetic measurement is utilized, and through reasonable design of a symmetrical structure, differential detection of acceleration is realized, and the acceleration measurement precision is improved.

Description

technical field [0001] The invention relates to the field of inertial measurement, in particular to a differential acceleration sensitive device based on NV color center solid-state spin. Background technique [0002] As a fully autonomous, real-time and continuous passive navigation technology, inertial navigation is widely used in military and civilian fields such as aviation, aerospace, navigation, surveying and mapping, and transportation. The acceleration sensitive device is a device that is sensitive to axial acceleration signals and converted into electrical signals The device, as one of the core information sources of the inertial navigation system, is the key device that determines the navigation performance. Therefore, the development of high-performance acceleration-sensitive devices has always been a research hotspot at home and abroad. [0003] At present, the performance of traditional MEMS acceleration sensing devices is difficult to break through the limiting...

AI Technical Summary

Problems solved by technology

[0003] At present, the performance of traditional MEMS acceleration sensing devices is difficult to break through the limiting factors such as its material characteristics and process technology, while other high-precision acceleration sensing devices or control systems are complex, large in size, difficult to miniaturize, or have high requirements on temperature and high cost , it is difficult to engineer in the short term

Diamond NV color center is a new type of solid-state quantum system that is easy to realize optical manipulation. The quantum sensing technology based on the spin of diamond NV color center has high stability, high sensitivity and high spatial resolution at room temperature. A new direction in the field, and the diamond NV color mandrel has Symmetry can be used to measure the vector magnetic field. Therefore, the sensitive acceleration based on the NV color center solid-state spin system is a feasible solution to break through the technical bottleneck of the traditional acceleration sensitive device. Considering that the magnetic levitation technology is used to levitate the magnetic source to achieve the differential measurement of the acceleration, it is easy to introduce magnetic field interference , and the operation is complex, so it needs to be further optimized

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