A tool face angle sensor based on machine vision

Abstract

The invention provides a tool face angle sensor based on machine vision. The tool face angle sensor comprises a base and a guide rail. The base is connected to one end of the guide rail. The guide rail is internally provided with an annular cavity. A magnetic ball is placed in the annular cavity. A pointer seat is fixed to the center of one end surface of the annular cavity. A graduated scale is arranged around the edge circumference. A rotating shaft is mounted on the pointer seat. A magnetic pointer is connected to one end of the rotating shaft and extends into the annular cavity. The guiderail, the pointer seat and the rotating shaft are non-magnetic. A camera is mounted on the other end surface of the annular cavity. A circuit board is fixed to the inner end surface of the base. The circuit board is connected to the camera. Rotation of the tool face angle sensor can cause the magnetic ball to roll in the annular cavity, and the magnetic pointer rotates following the magnetic ball.The camera takes pictures before and after the tool face angle sensor rotates, the circuit board processes the pictures and calculates the angle of rotation of the magnetic ball around the axis of the annular cavity, and the angle is a tool face angle. The tool face angle sensor based on machine vision has the beneficial effects that the tool face angle is measured by using the visual principle,the measurement is accurate, the precision is high, and the environment adaptability is high.

Description

technical field [0001] The invention relates to the technical field of non-excavation drilling for oil and gas wells, in particular to a tool face angle sensor based on machine vision. Background technique [0002] In recent years, with the acceleration of urbanization in China, urban pipeline construction projects are increasing day by day, and the traditional excavation pipeline laying method is increasingly unsuitable for modern construction due to its shortcomings such as damaging roads, affecting traffic and disturbing residents. In this context, the application of trenchless technology was born. Trenchless technology is a technology that uses tools such as trenchless drilling rigs to lay pipelines underground without digging the surface. During the non-excavation construction process, when the drilling rig provides forward thrust and rotation power to the drill pipe, the drill bit is evenly pushed by the surrounding rock, so as to realize straight-line drilling. When ...

AI Technical Summary

Problems solved by technology

[0003] The tool face angle is measured by the tool face angle sensor, but the existing sensors are limited by factors such as low accuracy, excessive temperature drift, large volume, and high installation accuracy requirements, which cannot meet the more precise non-excavation guidance requirements , therefore, there is an urgent need to develop a tool face angle sensor with high precision and suitable for non-excavation working conditions

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