System and method for underground attitude measurement based on laser ranging and acceleration measurement

Abstract

The invention discloses a system and a method for underground attitude measurement based on laser ranging and acceleration measurement. The system comprises a datum reference board, a reflective material block group, a datum reference board support, a laser ranging sensor group, an acceleration sensor unit and a measurement controller. Distances from the laser ranging sensors mounted on an object to be measured to reflective material blocks mounted on the datum reference board are measured, the measured distances are calculated to obtain deviation angle and pitch angle of the object to be measured with respect to the datum reference board, an acceleration sensor mounted on the object to be measured is used to measure tri-axial acceleration vectors of the object to be measured in an Euclidean Space and to calculate roll angle of the object to be measured, and accordingly direction and attitude of the object to be measured are obtained. The system and the method are capable of assisting a user in quickly acquiring the information of attitude and position of the object to be measured under severe environments such as mines and the like so as to further provide accurate and reliable data for further engineering operations. The system and the method are simple in operation, safe, reliable and low-cost.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a system and method for measuring downhole posture based on laser ranging and acceleration measurement. Background technique [0002] Downhole measurement is an important work in the process of mine production and construction. It is the eyes of mine safety production. Therefore, the development of advanced underground measurement methods and the development of practical and effective measurement tools and systems are of great value to the construction of the national economy, and are also conducive to social stability and the construction of a harmonious society. [0003] Attitude measurement, as an important part of downhole measurement, is of great significance to ensure the safe production of mines, because before mining and excavation, a drilling rig must be used for drilling operations in order to discharge gas and water. The attitude, orientation and working status o...

AI Technical Summary

Problems solved by technology

Such as the electromagnetic measurement method, due to the extremely prominent underground geomagnetic interference, it is almost impossible to measure the deflection angle

Based on the beacon method, due to the size limitation of the underground roadway, the installation of the beacon is limited

Measurement methods based on inertial navigation are also constrained by cost and size constraints

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