CN221977255U - Image acquisition device suitable for small-hole-diameter chamber - Google Patents

Abstract

The utility model discloses an image acquisition device suitable for small-diameter caverns, including a support frame, a lighting and energy supply component, a camera posture adjustment component, and an image acquisition component; the utility model has the advantage that the retractable tripod support frame can adapt to the working environment of excavation engineering bottom plate debris, ensuring the stability of the entire device; the flexible LED light strip and matching mobile power supply provided by the device can provide a uniform and stable light source for the cavern without the aid of a rigid track and without being affected by the shape of the cavern, ensuring the image acquisition effect within 10 meters and improving the success rate of three-dimensional real scene modeling. The rotating chassis cooperates with the compass and the metal bracket so that the SLR camera can perform image acquisition in a fixed shooting posture and can provide accurate image shooting posture data. The fisheye lens ensures the overlap rate of image acquisition while reducing the number of image acquisitions, thereby improving the success rate of three-dimensional real scene modeling of the cavern.

Description

Image acquisition device suitable for small-diameter caverns

Technical Field

The utility model relates to the technical field of geological image acquisition, in particular to an image acquisition device suitable for caverns with small diameters.

Background Art

With the development of science and technology, the current geological cataloging of construction geology has changed from the traditional on-site operation of compass, pencil and paper to digital and intelligent three-dimensional real-scene modeling. The on-site excavation slope has realized the combination of drone image acquisition and three-dimensional real-scene modeling, realizing the digital extraction of geological information and geological cataloging functions, saving a lot of on-site work time for on-site construction geologists.

Caverns and slopes are different. Due to the excavation conditions, lighting conditions and signal problems of underground spaces, conventional drone image acquisition and modeling processes cannot be applied to caverns. The currently feasible technical routes are 3D laser scanning and SLR camera image acquisition. The 3D laser scanning route has fatal problems such as high equipment cost, long operation time, and certain technical requirements for on-site operators, and has not been widely used in construction geology.

There are also many problems with the cavern image acquisition and modeling route based on SLR cameras. The first is the geological conditions of the cavern. Caverns, especially construction branch caverns, water diversion and power generation caverns, are mostly caverns with large curvatures and large elevation changes, which imposes very large restrictions on image acquisition equipment and methods. Secondly, the cavern is a confined space with no stable light source available. The lighting used for on-site construction has problems with different colors and poor illumination angles. The camera's built-in flash has a small illumination area, resulting in different brightness of the cavern image. All of these cannot be applied to image acquisition for three-dimensional real-scene modeling. Furthermore, the cavern is an underground space with no satellite or communication signals, resulting in a lack of spatial position information and shooting posture information in the image. The three-dimensional real-scene model has problems with low modeling success rate and poor model accuracy.

Utility Model Content

The utility model aims to provide an image acquisition device suitable for a cavern with a small diameter.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

The utility model discloses an image acquisition device suitable for a small-diameter cave, comprising a support frame, a lighting and energy supply component, a camera posture adjustment component, and an image acquisition component;

The support frame is a telescopic tripod support frame, and the top of the tripod support frame is provided with a platform;

The lighting and energy supply component is fixed on the platform, including a flexible LED light strip and a mobile power supply for supplying energy to the flexible LED light strip;

The components for adjusting the photographing posture include a rotating chassis with an angle scale, a compass, a circular level, and a metal bracket;

The compass and circular level are embedded in the cylindrical protrusion at the top of the mobile power source;

The rotating chassis is sleeved on the cylindrical protrusion and rotates along the cylindrical protrusion; the metal bracket is fixedly connected to the rotating chassis and rotates with the rotating chassis;

The image acquisition component is a single-lens reflex camera, which is movably connected to the metal bracket. The acquisition device ensures the stability of the entire device through a retractable tripod support, and with the rotating chassis and compass, it can provide accurate shooting posture information for the images collected by the image acquisition component, which is conducive to subsequent image processing.

Furthermore, the SLR camera is equipped with a fisheye lens and has no flash. The present invention provides lighting for cave shooting through a flexible LED light strip. Compared with the flash built into the SLR camera, its light source is more stable and uniform, which can ensure the quality of the captured image and improve the success rate of cave real scene modeling.

Furthermore, the flexible LED light strip is divided into two sections, which are wound around the mobile power source when stored; when in use, the image acquisition device suitable for small-diameter caverns is used as the center and laid along the cave axis; the mobile power source is 12V. The present invention has its own power source and does not require additional power source configuration, which is convenient for movement in the cave, improves work efficiency, and simplifies the equipment deployment procedure.

Furthermore, the angle scale is marked counterclockwise.

Furthermore, the metal bracket is provided with a right-angle slot and a connecting block; one end of the connecting block is embedded in the right-angle slot, moves along the right-angle slot, and rotates at a right angle; a threaded hole is provided in the middle of the connecting block, and is connected and fixed to the image acquisition component through a threaded connecting rod. The rotation of the connecting block in the right-angle slot drives the rotation of the SLR camera to achieve shooting of the cave wall and cave ceiling. This connection method is simple, reliable, low-cost, and easy to operate on site.

The advantage of this utility model is that the retractable tripod support frame can adapt to the working environment of the excavation engineering bottom plate debris, ensuring the stability of the entire equipment; the flexible LED light strip and matching mobile power supply that come with the equipment can provide a uniform and stable light source for the cavern without the help of a rigid track and unaffected by the shape of the cavern, ensuring the image acquisition effect within 10 meters and improving the success rate of three-dimensional real scene modeling. The rotating chassis, combined with the compass and the metal bracket, allows the SLR camera to collect images in a fixed shooting posture and can provide accurate image shooting posture data. The fisheye lens ensures the overlap rate of image acquisition while reducing the number of images collected, thereby improving the success rate of three-dimensional real scene modeling of the cavern.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the structure of the device of the utility model.

FIG. 2 is a schematic diagram of the structure of the metal bracket of the present utility model.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

As shown in FIG1 , the image acquisition device for small-diameter caverns described in the utility model includes a support frame, a lighting and energy supply component, a camera posture adjustment component, and an image acquisition component;

The support frame is a telescopic tripod support frame, and the top of the tripod support frame is provided with a platform. The tops of the first workpiece 101, the second workpiece 102, and the third workpiece 103 of the telescopic tripod support frame are welded and fixed together with the platform 200. The first workpiece 101, the second workpiece 102, and the third workpiece 103 are telescopically adjustable, so as to facilitate the adjustment of the height of the image acquisition device and form a stable support on the floor of the cave.

The lighting and energy supply components are fixed on the platform 200. The lighting and energy supply components include a flexible LED light strip 203 and a mobile power supply 201 for supplying energy to the flexible LED light strip. The mobile power supply is 12V, and power supply interfaces 202 are provided at the front and back for connecting the flexible LED light strip 203. The flexible LED light strip 203 consists of two 5-meter-long light strips. When not in use, they are wrapped around the outer wall of the mobile power supply 201. When in use, the image acquisition device of the present invention suitable for small-diameter caverns is taken as the center and laid along the axis of the cave, that is, a 5-meter flexible LED light strip 203 is placed in front of and behind the image acquisition device suitable for small-diameter caverns. The flexible LED light strip 203 solves the problem of small illumination range and uneven illumination of the flash light of the image acquisition device. The flexible LED light strip 203 and mobile power supply 201 provided by the present invention do not require additional power supply configuration, and can provide a uniform and stable light source for the cave without the aid of a rigid track and without being affected by the shape of the cave, thereby ensuring the uniformity of the color of the collected images within a range of 5 meters front and back and facilitating movement in the cave, thereby improving operating efficiency, simplifying the equipment deployment procedure, ensuring the image collection effect within 10 meters, and improving the success rate of three-dimensional real scene modeling.

The components for adjusting the photographing posture include a rotating chassis 303 with an angle scale, a compass 301, a circular level 302, and a metal bracket 500. The compass 301 is used to indicate the direction angle, and the circular level 302 is used to level the equipment. The compass 301 and the circular level 302 are embedded in the cylindrical protrusion at the top of the shell of the mobile power supply 201. The rotating chassis 303 is mounted on the cylindrical protrusion. That is, the rotating chassis 303 can rotate along the cylindrical protrusion, while the compass 301 and the circular level 302 are fixed. The angle scale on the rotating chassis 303 is marked counterclockwise to mark the shooting posture of the image acquisition device.

As shown in FIG2 , the metal bracket 500 in the camera posture adjustment component is fixedly connected to the rotating chassis 303 and rotates with the rotating chassis 303. The metal bracket 500 is provided with a right-angle slot 501 and a connecting block 502. One end of the connecting block 502 is embedded in the right-angle slot 501, moves along the right-angle slot 501, and the connecting block 502 can rotate at the right-angle corner. The middle part of the connecting block 502 has a threaded hole that penetrates through it, and is connected and fixed to the threaded hole at the bottom of the image acquisition component through a threaded connecting rod 503, so that the image acquisition component is fixed to the camera posture adjustment component.

When the rotating chassis 303 in the photographing posture adjustment component rotates, it will drive the metal bracket 500 to rotate together, and then drive the image acquisition component to rotate on the same horizontal plane, so that images of different directions and angles on the same horizontal plane can be captured.

At the same time, when the connection block 502 rotates 90 degrees at the right angle corner, it will drive the image acquisition component to rotate 90 degrees, so that the originally horizontal image acquisition component is converted to a vertical one, so that the image of the cave top can be captured, and the cave wall and cave top can be captured. This connection method is simple, reliable, low-cost, and easy to operate on site.

The image acquisition component is a SLR camera 401, which is equipped with a fisheye lens 402 and has no flash. A flexible LED light strip is used to provide lighting for shooting in the cave.

Claims (5)

1. Image acquisition device suitable for little footpath cavern, its characterized in that: the device comprises a support frame, an illumination and energy supply component, a shooting posture adjusting component and an image acquisition component;

the support frame is a telescopic tripod support frame, and a platform is arranged at the top of the tripod support frame;

The illumination and energy supply component is fixed on the platform and comprises a flexible LED lamp strip and a mobile power supply for supplying energy to the flexible LED lamp strip;

The photographing posture adjusting component comprises a rotary chassis with angle scales, a compass, a circular collimator and a metal bracket;

the compass and the circular level are embedded in a cylindrical bulge at the top end of the mobile power supply;

the rotary chassis is sleeved on the cylindrical bulge and rotates along the cylindrical bulge; the metal bracket is fixedly connected with the rotary chassis and rotates along with the rotary chassis;

The image acquisition component is a single-lens reflex camera and is movably connected with the metal bracket.

2. The image acquisition device for a small-bore chamber of claim 1, wherein: the single lens reflex is provided with a fisheye lens and has no flash lamp.

3. The image acquisition device for a small-bore chamber of claim 1, wherein: the flexible LED lamp strip is in two sections and is wound on the mobile power supply when being stored; when in use, the image acquisition device suitable for the small-hole-diameter chamber is taken as the center and paved along the axial direction of the hole; the mobile power supply is 12V.

4. The image acquisition device for a small-bore chamber of claim 1, wherein: the angle scale is marked anticlockwise.

5. The image acquisition device for a small-bore chamber of claim 1, wherein: the metal bracket is provided with a right-angle clamping groove and a connecting block; one end of the connecting block is embedded into the right-angle clamping groove, moves along the right-angle clamping groove and rotates at the right angle; the middle part of the connecting block is provided with a through threaded hole, and the connecting block is fixedly connected with the image acquisition component through a threaded connecting rod.