What is the structure of a gyrotheodolite?

A gyrotheodolite consists of a gyroscope, a theodolite, and a tripod.

Gyro theodolite is an instrument used to measure true north azimuth by combining gyroscope and theodolite through connecting mechanism. It uses the physical characteristics of the gyroscope itself (fixed axis and precession), the sensitive part of the gyroscope with the center of gravity moved down is used to sensitive the horizontal component of the earth's rotation angular velocity, and under the action of gravity, a northward precession moment is generated, so that the gyroscope spindle swings around the Earth's meridian plane, so as to determine the true north azimuth. Gyro theodolite is widely used in mine survey, engineering survey and military surveying, and is also an important supporting equipment for radar antenna orientation, UAV flight orientation, artillery and long-range weapon launching orientation.

The gyroscope used in the gyro theodolite produced by Ericco is also a high-precision product independently developed, which not only has ultra-high precision north finding, its measurement principle is integral method, but also has strong anti-interference ability and high stability. Gyroscope adopts integrated body design (built-in battery), compact structure and stable performance. It has the functions of low position locking, automatic zero observation, automatic north finding, automatic limit and wide temperature compensation. By iterating the limiter step by step, it provides the north-finding accuracy of the reference plane azimuth and reduces the north-finding time.

(1) Gyroscope

The gyroscope is the core of the system. It is mainly composed of the gyroscope's sensitive part, electromagnetic shielding mechanism, hanging wire and guide wire, azimuth rotation servo drive device, damping device, inertia sensitive part locking device, support and leveling device, photoelectric angle sensor , Power, control and display parts.

The gyro sensitive part includes a gyro motor rotating at a constant speed. The gyro motor is suspended from the gyro frame by a hanging wire and is powered by a guide wire.

The gyro sensitive part locking device is to ensure the safety of the gyro sensitive part in the transportation state, and fix the inertia sensitive part to the frame.

The damping device is to attenuate the swing amplitude of the gyro's sensitive part after it is released, so that its swinging state meets the north seeking requirements, and finally to overcome the northward precession moment, so that the gyro's sensitive part is relatively stable in a fixed orientation of the inertial space. Damping includes friction damping, liquid damping, and electromagnetic damping.

The azimuth inversion servo drive system can realize the azimuth rotation of the gyroscope and provide slewing 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 entire set of instruments, and the installation and connection of various components.

The photoelectric angle sensor includes a photoelectric angle sensor that detects the swing angle of the inertial sensitive part, and a grating code disk system that detects the azimuth rotation angle of the gyroscope.

Electromagnetic shielding is mainly used to shield the internal and external magnetic fields from gyro north seeking.

The control and display part collects signals through sensors and processes them to complete the functions of locking and releasing the gyroscope's sensitive parts, damping control, azimuth following, communication, solving, sending and displaying the true north position angle.

(2) Theodolite

The theodolite is the system's azimuth extraction device. It can also measure the target's geographic azimuth or coordinate azimuth by aiming at the measured target. The theodolite is equipped with self-collimation function, which is convenient for measurement and calibration. Usually, the theodolite has a serial communication interface, which can realize serial data communication with the gyroscope and command system.

(3) Tripod

A tripod provides support for the gyrotheodolite.

If you want to get more details about gyrotheodolite,pls visithttps://www.ericcointernational.com/gyro-theodolite/