Reflection-type concave conical mirror panoramic camera device suitable for deep hole observation of rock mass structure

Abstract

The invention relates to a reflection type concave conical mirror panoramic camera device suitable for deep hole observation of a rock mass structure. A glass window connecting piece used for being fixedly connected with the glass window is arranged on the metal shell. The glass window connecting piece and the metal shell are in the same central axis direction, and the section perpendicular to the central axis direction is in a circular ring shape. Light source through holes distributed in the circumferential direction are formed in the glass window connecting piece, and the inner cutting groove is communicated with the hollow part of the metal shell through an inner cutting groove formed in the inner wall of the glass window connecting piece; the data acquisition circuit comprises light sources and a camera, and the light sources penetrate through the inner cutting grooves and then are embedded into the light source through holes; the camera collects a hole wall image obtained through reflection of the reflective concave conical mirror. Therefore, the design form and the design strength of the glass window of the panoramic camera device meet the application depth range of optical imaging equipment.

Description

technical field [0001] The invention relates to the fields of optical imaging and integrated circuits, in particular to a reflective concave-cone mirror panoramic camera device suitable for observing rock mass structures in deep holes. Background technique [0002] The existence of structural planes is the root cause of the discontinuity, anisotropy and inhomogeneity of rock mass engineering properties. It constitutes the isolation surface and sliding surface in rock mass, and controls the scale and type of rock mass instability failure. [0003] Geological drilling is the most conventional method to go deep into the rock mass. Combined with borehole optical imaging, ultrasonic imaging, resistivity imaging and other hole wall imaging technologies, it is possible to observe the borehole wall at 360°, and identify structural planes and drill holes through downhole in-situ measurement. The intersecting trace lines of the holes, as well as the corresponding relationship between ...

AI Technical Summary

Problems solved by technology

The commonly used forms of glass windows are generally hollow cylinders or plane discs, but there are some problems in the two types of glass windows: 1. Hollow cylindrical glass windows generally have thinner walls, and the glass windows and metal Between the shells, the sealing connection formed by glue or O-ring has poor water pressure resistance and is not suitable for testing in deep holes

2. The glass window in the shape of a flat disc can be designed with a thicker wall thickness, which basically meets the water pressure resistance. However, the optical path of this type of glass window generally does not have a special refraction or reflection design, so it is not satisfactory in the optical path. The basic requirement of observation perpendicular to the borehole wall, this non-orthoscopic observation does not meet the basic measurement principles, so that although the flat disc-shaped glass window meets the requirements of water pressure resistance, it does not meet the requirements of measurement

[0006] (2) Compatibility issues between different materials in high temperature special environment

[0007] According to the ground temperature gradient and water pressure, there may be a test environment with high ground temperature and high osmotic pressure in the deep part of the rock mass, while the optical imaging equipment is composed of a metal shell and optical glass, which has high requirements for the test environment. Especially under high water temperature and high water pressure, it is difficult to ensure the coordination of expansion and contraction and thermal expansion between two different materials

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