The gyro theodolite consists of a gyroscope, a theodolite and a tripod.
The gyroscope is the core of the system, which is mainly composed of gyroscope sensitive part, electromagnetic shielding mechanism, hanging wire and guide wire, azimuth rotary servo drive device, damping device, inertial sensitive part locking device, supporting and leveling device, photoelectric Angle sensor, power supply, control and display part.
A gyro motor rotating at a constant speed is provided in the gyro sensitive department. The gyro motor is suspended from the gyro frame by the hanging wire and powered by the guide wire.
The gyro sensitive part locking device is to ensure the gyro sensitive part safety in the transportation state, and the inertial sensitive part and the frame are fixed.
The damping device is designed to attenuate the swing amplitude of gyro sensitive part after release, make its swing state meet the requirement of north search, and finally overcome the north precessional moment, so that the gyro sensitive part is relatively stable in a fixed position in inertial space.Damping friction damping, liquid damping and electromagnetic damping and other ways.
The azimuthal indentations servo drive system can realize azimuthal rotation of the gyroscope and provide rotation torque and stable transmission.
The support and leveling device can realize the mechanical and optical docking between the theodolite and the gyroscope, the leveling of the whole instrument and the installation and fixation of each component.
The photoelectric Angle sensor includes a photoelectric Angle sensor for detecting the swing Angle of the inertial sensing part and a grating code disk system for detecting the azimuth rotation Angle of the gyroscope.
Electromagnetic shielding is mainly used to shield the interference of internal and external magnetic fields to gyro north finding.
The control and display part collects the signal through the sensor, and processes it, and completes the lock and release of the gyroscope sensitive part, damping control, azimuth follow up, communication, calculation, sending and display true north azimuth and other functions.
(2) the theodolite
The theodolite is the bearing extraction device of the system. It can also measure the target's geographic azimuth or coordinate azimuth by aiming at the target.The theodolite has the function of self-collimation for easy measurement and calibration.Usually, the theodolite has serial communication interface, which can realize serial data communication with the gyroscope and the command system.
(3) the tripod
The tripod provides support for the gyro theodolite.