A bidirectional optical communication and wireless power supply single-axis rotational inertial navigation system

Abstract

The invention discloses a two-way optical communication and wireless power supply single-axis rotary inertial navigation system. The system includes a two-way optical communication unit, a wireless power supply unit, a motor drive unit, an inertial measurement unit, a rotating end information collection and processing unit, and a fixed end information receiving unit. with processing unit. In the same transmission channel, the system uses infrared light and visible light communication to realize information interaction between the rotating end and the fixed end; it uses a magnetic coupling resonant wireless power supply method to realize medium-power and high-efficiency wireless energy transmission at a specific distance. It adopts frameless torque motor, combined with incremental circular grating and double reading head design to realize the design of high-precision motor drive unit. The above key technologies can avoid the entanglement of cables and the friction and wear of conductive slip rings, realize small-volume wireless signal and energy transmission under limited space, and improve the information output accuracy of the rotary inertial navigation system. The system and method of the invention have the characteristics of strong practicability and high precision of navigation information.

Description

technical field [0001] The invention relates to the technical field of inertial navigation system design, in particular to a two-way optical communication and wireless power supply single-axis rotational inertial navigation system. Background technique [0002] The high-precision, lightweight and miniaturized design of inertial navigation systems has always been one of the key technologies for long-endurance autonomous navigation of underwater carriers. The rotation modulation technology is an effective means to improve the accuracy of the inertial navigation system. By introducing a rotating mechanism, the inertial measurement unit can be rotated in a full cycle. After demodulation, the full cycle integration can eliminate or suppress the inertial sensor constant value drift and slowness in the direction perpendicular to the rotation axis. error, thereby improving the accuracy of the inertial navigation system. [0003] In order to flexibly design the indexing scheme and a...

AI Technical Summary

Problems solved by technology

[0003] In order to flexibly design the transposition scheme and avoid cable entanglement, the existing rotary modulation inertial navigation system generally uses conductive slip rings to realize contact signal and energy transmission between the rotating part and the fixed part, which has low service life and long-term friction. Inherent disadvantages such as reduced reliability caused by wear and tear, so it is necessary to introduce wireless signal and energy transmission technology into the rotary modulation inertial navigation system

[0004] The wireless power transmission technology applied to the rotary modulation inertial navigation system is mainly electromagnetic induction wireless power supply and electromagnetic resonance wireless power supply. Sensitive; the transmission distance of electromagnetic resonance wireless power supply is relatively long, and the sensitivity to the misalignment of the primary and secondary windings is small, which is more suitable for application in the rotary modulation inertial navigation system. High-efficiency wireless power transmission, such as "A Wireless Power and Information Transmission Device for Inertial Navigation System" (Patent No. 201611020309.2) by Gao Tao, Wang Hao, Lei Geyang, etc., uses electromagnetic resonance wireless power supply, and its The primary power transmission winding and the information transmission winding share the primary magnetic core, and the secondary power transmission winding and the secondary information transmission winding share the secondary magnetic core. Both wireless power and information transmission are transmitted by magnetic circuits, and there is a potential problem of mutual interference.

Images