Single-axis rotational inertial navigation system based on bidirectional optical communication and wireless power supply

A single-axis rotational inertial navigation system based on bidirectional optical communication and wireless power supply, comprising a rotating part and a fixed part, wherein the rotating part consists of an inertial measurement unit, a rotating-end information acquisition and processing unit, a visible light receiving end PCB (4), a wireless power supply secondary winding (8), a wireless power supply secondary magnetic core (9), an incremental circular grating (12) and a frameless torque motor rotor (18);

• the fixed part consists of an infrared light receiving end PCB (3), a wireless power supply primary magnetic core (6), a wireless power supply primary winding (7), a first reading head (13), a second reading head (23), a frameless torque motor stator (17), a wireless power supply transmitting end PCB (31), a motor driving board (32), and a fixed-end information receiving and processing unit;
• the incremental circular grating (12), the frameless torque motor rotor (18), the first reading head (13), the frameless torque motor stator (17) and the motor driving board (32) form a motor driving unit, wherein the first reading head (13) is configured to read a rotation angle of the incremental circular grating (12) and to transmit the rotation angle to the motor driving board (32);
• and the motor driving unit is configured to drive the frameless torque motor rotor (18) to drive the rotating part to rotate according to a certain indexing scheme;
• the first reading head (13) and the second reading head (23) are symmetrically installed on both sides of the incremental circular grating (12) and used to compensate for installation eccentric errors of the motor;
• the wireless power supply transmitting end PCB (31), the rotating-end information acquisition and processing unit, the wireless power supply primary magnetic core (6), the wireless power supply primary winding (7), the wireless power supply secondary winding (8) and the wireless power supply secondary magnetic core (9) jointly form a wireless power supply unit, wherein the wireless power supply primary winding (7) and the wireless power supply secondary winding (8) are respectively placed in the wireless power supply primary magnetic core (6) and the wireless power supply secondary magnetic core (9), the wireless power supply transmitting end PCB (31) is configured to drive the wireless power supply primary winding (7);
• and the rotating-end information acquisition and processing unit of the rotating part is powered by magnetically coupled resonance between the wireless power supply primary winding (7) and the wireless power supply secondary winding (8);
• the visible light receiving end PCB (4) in the rotating part and the infrared light receiving end PCB (3) in the fixed part form a bidirectional optical communication unit;
• the rotating-end information acquisition and processing unit is configured to acquire information of the inertial measurement unit;
• and the bidirectional optical communication unit is configured to transmit the data of the inertial measurement unit to the fixed-end information receiving and processing unit.