Plug and play optical fiber gyro and total station combination orientation method

Abstract

The invention discloses a plug and play optical fiber gyro and total station combination orientation method, which is a hardware combination method, an operation flow and a calculation formula applied to surveying and mapping work. The method comprises the following steps of: leveling and centering the total station on a control point of a known point position longitude B; fixedly connecting the optical fiber gyro to a telescope of the total station by using a locking device; connecting a power supply and computer equipment with the optical fiber gyro; horizontally rotating an alidade of the total station to drive the telescope of the total station to an east orientation position and a west orientation position which have an included angle of 180 degrees respectively; vertically rotating the telescope of the total station 180 degrees at the east orientation position and the west orientation position respectively to drive the optical fiber gyro to an east orientation compensation position and a west orientation compensation position; measuring the rotational angular velocities of the earth by using the optical fiber gyro at the four positions respectively; and calculating a true azimuth of a collimation axis of the total station at the east orientation position by using measurement data. In the method, the structure is simple, connection error calibration is not needed to be performed, and the orientation of the total station can be realized under the condition of only one control point by performing simple operation.

Description

technical field [0001] The invention relates to an orientation method, in particular to a combined orientation method of a plug-and-play optical fiber gyroscope and a total station for surveying and mapping. The invention belongs to the technical field of mechanical surveying and mapping. Background technique [0002] In surveying and mapping work, when using the total station for point measurement or stakeout, it is necessary to first determine the azimuth of the total station's collimation axis, that is, to carry out the total station orientation. The current total station orientation method is to erect the total station on a known control point, look back at another known control point that is far apart, and obtain the azimuth of the total station's line-of-sight axis by inverse calculation of the coordinates of the two points. GPS positioning technology has the advantage of not needing inter-point line-of-sight during point measurement, and has become the main means of c...

AI Technical Summary

Problems solved by technology

[0015] This invention has the following deficiencies: firstly, the condition that "the fiber optic gyroscope is installed on the telescope of the total station in such a way that the angle between its axis and the transverse axis of the total station does not exceed 5 degrees" requires very high requirements for the design and processing of the connecting device , in order to prevent deformation, high requirements are put forward for the material selection of the connecting device; secondly, the calculation result using formula (1) is greatly affected by the installation error angle, and is also affected by the transverse axis error of the total station; However, with the installation method of this invention, due to the small installation error limit and the long cantilever of the connecting device, it is difficult to install at the work site

[0016] There will be a previously unknown gyroscope zero bias error in the measured value after each power-on of the fiber optic gyroscope, which will bring errors to the calculation of the azimuth angle of the fiber optic gyroscope axis; In total station work, what needs to be obtained is the azimuth angle of the collimation axis of the total station, so there is a connection error angle between the fiber optic gyro axis and the collimation axis of the total station

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