What is the Difference Between a Gyroscope and a Gimbal?

[The gyroscope principle refers to the principle of the gyroscope's operation. The gyroscope is a device used to sense and maintain the direction. It is based on the theory of conservation of angular momentum. The gyroscope is mainly composed of a rotatable rotor located on the axis. Once the gyroscope starts to rotate, due to the angular momentum of the rotor, the gyroscope tends to resist the change of direction.

Gyroscope principle

Tunnel centerline measurement

In excavations such as tunnels, the centerline measurement in the pit is generally measured

Gyroscope principle

Use long-distance wires for which accuracy cannot be guaranteed. Especially in the case of shield tunneling, it is necessary to have high angle measurement accuracy and relocation accuracy starting from the short reference centerline of the pit. Corresponding inspections on the ground and underground must be frequently performed during the measurement to ensure the measurement. The accuracy. Especially in dense urban areas, it is impossible to carry out too many inspection operations and encounter difficulties. If you use a gyrotheodolite, you can get an absolute high-precision azimuth reference, and it can reduce the expensive inspection work (the minimum number of check points). It is a very efficient centerline measurement method.

Obtaining the azimuth angle in the visually impaired

When there is a visual impairment and the azimuth cannot be obtained from a known point, astronomical or gyrotheodolite measurements can be used to obtain the azimuth (according to the measurement specifications of the Ministry of Construction). Compared with astronomical measurement, the method of gyrotheodolite measurement has many advantages: it is less dependent on the weather, the number of clouds is irrelevant, no complicated astronomical calculations are needed, and the direction angle of any survey line can be obtained on site to easily calculate the closure difference.

True North determination required for sun shadow calculation

In urban or suburban areas, there are height restrictions on sunlight or sunlight conditions for high-rise buildings. At the time of construction application, a sun map should be attached. This heliostat refers to the high-precision true north direction measurement required for calculation and drawing on the basis of 8 to 16 o'clock in the true solar time of the winter solstice. Using a gyrotheodolite to obtain a true north measurement independent of weather and time. ^[1]