Underground observation instrument and underground orientation system

Abstract

The invention discloses an underground observation instrument and an underground orientation system, and the underground observation instrument comprises an optical fiber gyroscope which collects optical fiber measurement acceleration values at designated positions according to a preset sequence; the angle control structure is arranged above the optical fiber gyroscope; the angle control structure is connected with the optical fiber gyroscope; the underground master control module is connected with the angle control structure, the underground master control module controls the optical fiber gyroscope to rotate according to a preset angle through an angle control interface, and the underground master control module receives an optical fiber measurement acceleration value collected by the optical fiber gyroscope and controls the optical fiber gyroscope to rotate according to the preset angle. And calculating an azimuth angle according to the optical fiber measurement acceleration value and the parameter of the current position. According to the underground measuring instrument and the underground orientation system, the measurement precision is improved, meanwhile, miniaturization of an underground observation instrument is achieved, the construction difficulty is small, reading is convenient, and adaptability is wide.

Description

technical field [0001] The invention relates to the technical field of downhole observation, in particular to an downhole observation instrument and a downhole orientation system. Background technique [0002] Accurately determining the installation orientation of seismic observation instruments is of great significance for the data analysis and application of seismic observation. Fine downhole observation and exploration instruments such as downhole seismometers require precise orientation. However, the traditional downhole instrument orientation methods are not convenient to use and have many restrictions. It is also quite difficult to obtain accurate downhole instrument orientation information. [0003] The installation orientation of underground surface observation is usually determined by means of mechanical compass and compass. But because the volume of mechanical gyroscope and electronic compass is all bigger, and electronic compass is easily subjected to electromagn...

AI Technical Summary

Problems solved by technology

Although this orientation method has reading errors and inconvenience in measurement, it is also a feasible orientation scheme for observation wells within 0 to 300 meters

For observation wells with a height of 500-1000 meters, it is difficult to use the base orientation method for construction, and the reading is inconvenient, and it cannot be re-inspected twice. There is an urgent need for an orientation scheme that is less difficult to construct and more convenient to read.

Images