CN111076047A

CN111076047A - Infrared panoramic image shooting turntable

Info

Publication number: CN111076047A
Application number: CN201911379554.6A
Authority: CN
Inventors: 窦科鳞; 张鹏; 朱骏; 肖宇钊; 向思桦
Original assignee: Chengdu Yingfeirui Technology Co Ltd
Current assignee: Chengdu Yingfeirui Technology Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-28

Abstract

The invention discloses an infrared panoramic image shooting turntable which comprises a base, an optical load cabin used for installing an infrared camera and an image stabilizing device thereof, an installation support for installing the optical load cabin, an azimuth axis system and a pitching axis system, wherein the azimuth axis system is connected with the installation support and the base so as to drive the installation support to rotate at a constant speed relative to the base in a horizontal plane; the pitching axis system is connected with the optical load cabin and the mounting bracket so as to change the pitch angle of the optical load cabin relative to the mounting bracket; and a locking piece for locking the pitch angle of the optical load cabin is arranged in the pitch axis system. Therefore, the rotating speed of the infrared camera in the rotating range of 360 degrees is unchanged, the image capturing speed of each azimuth is the same, and the accuracy of the synthesized panoramic image is effectively improved. Meanwhile, as the locking piece is arranged in the pitching shaft system, the pitching angle of the optical load cabin and the mounting bracket can be ensured to be unchanged in the rotating process, so that the shooting range of the infrared camera is kept unchanged, and the accuracy of the synthesized panoramic image is improved.

Description

Infrared panoramic image shooting turntable

Technical Field

The invention relates to the technical field of infrared panoramic photography, in particular to an infrared panoramic image shooting turntable.

Background

In the field of security monitoring of important facilities and areas, the environment within a 360-degree wide area needs to be monitored in real time, and suspicious targets and conditions need to be discovered in time.

The infrared cameras are limited in shooting range, and multiple infrared cameras are required to be used for shooting simultaneously in different directions if real-time monitoring of environmental conditions in different directions is to be realized, so that the cost is high, the installation and maintenance are difficult, and the risk of viewing angle blind areas among the multiple infrared cameras exists.

In the prior art, the purpose of shooting a panoramic image of a large-scale environment by using a single infrared camera is realized by carrying the infrared camera and the image stabilizing device thereof to rotate in the horizontal direction of 360 degrees and continuously shooting infrared images of all directions and then splicing panoramic photos. The existing infrared panoramic image shooting turntable mainly carries out directional shooting facing a fixed angle, only has requirements on the positioning accuracy of an azimuth axis and a pitch axis, but cannot keep the azimuth axis rotating at a constant speed and fixing the position of the pitch axis in a horizontal direction, so that the panoramic image is blurred in the shooting process, and the target recognition and early warning effects are influenced.

In summary, how to improve the imaging effect of the infrared panoramic image shooting turntable carrying the infrared camera is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of this, an object of the present invention is to provide an infrared panoramic image shooting turntable, which can maintain a uniform rotation of an azimuth axis in a horizontal azimuth and effectively fix a pitch angle of a pitch axis, thereby improving an imaging effect of an infrared camera and improving an imaging accuracy of the infrared camera.

In order to achieve the above purpose, the invention provides the following technical scheme:

an infrared panoramic image shooting turntable comprises a base, an optical load cabin used for installing an infrared camera and an image stabilizing device thereof, an installation support for installing the optical load cabin, an azimuth axis system and a pitching axis system, wherein the azimuth axis system is connected with the installation support and the base so as to drive the installation support to rotate at a constant speed relative to the base in a horizontal plane;

the pitching shafting is connected with the optical load cabin and the mounting bracket so as to change the pitch angle of the optical load cabin relative to the mounting bracket;

and a locking piece for locking the pitch angle of the optical load cabin is arranged in the pitch shaft system.

Preferably, the azimuth axis system comprises an azimuth main shaft, an azimuth bearing, an azimuth motor fixing seat for mounting the azimuth motor, an azimuth encoder for feeding back rotation angle information and an azimuth control device, wherein the azimuth motor comprises a torque motor, the azimuth motor fixing seat is connected with the base, and the azimuth main shaft is connected with the mounting bracket;

the azimuth main shaft is arranged in the azimuth motor fixing seat through the azimuth bearing, and the azimuth motor is connected with the azimuth control device, so that the azimuth control device controls the azimuth motor to directly drive the azimuth main shaft;

the azimuth encoder is arranged in the inner cavity of the base, the azimuth encoder is sleeved with the azimuth spindle, and the azimuth control device is connected with the azimuth encoder.

Preferably, an azimuth spindle flange is arranged on the end face, close to the mounting support, of the azimuth spindle, a plurality of threaded holes used for being connected with the mounting support are formed in the azimuth spindle flange, and the threaded holes are evenly distributed in the circumferential direction of the azimuth spindle flange.

Preferably, the azimuth bearing comprises a pair of angular contact ball bearings to eliminate radial runout and axial runout between the azimuth motor fixing seat and the azimuth spindle.

Preferably, the pitch shafting comprises a first pitch shaft, a second pitch shaft, a worm gear device connected with the first pitch shaft, a pitch motor driving the worm gear device, a pitch encoder for feeding back pitch angle information and a pitch control device, wherein an output shaft of the pitch motor is connected with the worm gear device, and the pitch motor and the pitch encoder are both connected with the pitch control device;

the first pitching shaft and the second pitching shaft are vertically arranged between the mounting bracket and the optical load cabin, the first pitching shaft and the second pitching shaft are respectively and fixedly connected with the two ends of the optical load cabin in the width direction, and the first pitching shaft and the second pitching shaft are rotatably connected with the mounting bracket.

Preferably, the locking member comprises a brake sleeved with the second pitching shaft, and the brake is connected with the pitching control device, so that when the pitching angle needs to be adjusted, the brake releases the second pitching shaft and holds the second pitching shaft tightly after the pitching angle is reached.

Preferably, the pitch encoder is sleeved outside the first pitch shaft.

Preferably, the worm gear and worm device comprises a worm gear connected with the first pitch shaft and a worm connected with the pitch motor, and the worm gear is meshed with the worm;

the axis of the worm is perpendicular to the bottom surface of the mounting bracket.

The invention provides an infrared panoramic image shooting turntable which comprises a base, an optical load cabin used for installing an infrared camera and an image stabilizing device thereof, an installation support used for installing the optical load cabin, an azimuth axis system and a pitching axis system, wherein the azimuth axis system is connected with the installation support and the base so as to drive the installation support to rotate at a constant speed relative to the base in a horizontal plane; the pitching axis system is connected with the optical load cabin and the mounting bracket so as to change the pitch angle of the optical load cabin relative to the mounting bracket; and a locking piece for locking the pitch angle of the optical load cabin is arranged in the pitch axis system.

Because the azimuth axis system can enable the mounting bracket to move at a uniform speed relative to the base in the horizontal plane, the rotating speed of a single infrared camera in a rotating range of 360 degrees is kept unchanged, the image capturing speed of each azimuth is the same, and the accuracy of the synthesized panoramic image is effectively improved.

Meanwhile, as the locking piece is arranged in the pitching axis system, in the rotating process of the mounting bracket, the locking piece can effectively ensure that the pitch angle of the optical load cabin and the mounting bracket is unchanged, so that the shooting range of the infrared camera in the rotating process is kept fixed, the shooting range caused by the change of the pitch angle in the rotating process is prevented from moving up and down, and the precision of the synthesized panoramic image is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of an infrared panoramic image shooting turntable provided by the present invention;

fig. 2 is a schematic cross-sectional view of the infrared panoramic image photographing turntable in fig. 1 in a front view direction;

fig. 3 is a partially enlarged view of the infrared panoramic image photographing turntable in fig. 2 in a region a;

fig. 4 is a schematic sectional view of the infrared panoramic image photographing turntable in fig. 2 in a B-B direction.

In FIGS. 1-4:

the device comprises an optical load cabin 1, a pitch axis system 2, a first pitch axis 21, a second pitch axis 22, a worm wheel 23, a worm 24, a pitch motor 25, a pitch encoder 26, a brake 27, a mounting bracket 3, an azimuth axis system 4, an azimuth spindle 41, an azimuth motor 42, an azimuth motor fixing seat 43, an azimuth bearing 44, an azimuth encoder 45 and a base 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide the infrared panoramic image shooting turntable which can keep the azimuth axis to rotate at a constant speed in the horizontal direction and effectively fix the pitching angle of the pitching axis, thereby improving the imaging effect of the infrared camera and the imaging precision of the infrared camera.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an infrared panoramic image shooting turntable according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view of the infrared panoramic image photographing turntable in fig. 1 in a front view direction; fig. 3 is a partially enlarged view of the infrared panoramic image photographing turntable in fig. 2 in a region a; fig. 4 is a schematic sectional view of the infrared panoramic image photographing turntable in fig. 2 in a B-B direction.

The invention provides an infrared panoramic image shooting turntable which comprises a base 5, an optical load cabin 1 for installing an infrared camera and an image stabilizing device thereof, an installation support 3 for installing the optical load cabin 1, an azimuth axis 4 and a pitching axis 2, wherein the azimuth axis 4 is connected with the installation support 3 and the base 5 so as to drive the installation support 3 to rotate at a constant speed relative to the base 5 in a horizontal plane; the pitching shafting 2 is connected with the optical load cabin 1 and the mounting bracket 3 so as to change the pitch angle of the optical load cabin 1 relative to the mounting bracket 3; a locking piece for locking the pitch angle of the optical load compartment 1 is arranged in the pitch axis system 2.

Preferably, referring to fig. 1, the optical load compartment 1 may include a compartment for accommodating and mounting the infrared camera and the image stabilizing device thereof, and when the optical load compartment 1 is used, the orientation axis 4 drives the compartment of the optical load compartment 1 to rotate in a horizontal plane, so as to drive the orientation of the infrared camera mounted in the optical load compartment 1 to change.

The size of the optical load compartment 1 is determined by the size of the infrared camera, etc.

One end of the pitching axis system 2 is connected with the optical load compartment 1, and the other end is connected with the mounting bracket 3, and is used for driving the optical load compartment 1 to rotate relative to the vertical plane where the mounting bracket 3 is located, so as to change the pitch angle of the optical load compartment 1 relative to the mounting bracket 3.

The mounting bracket 3 is connected with the base 5 through the azimuth axis 4, and the optical load compartment 1 is mounted in the mounting bracket 3, so that when the mounting bracket 3 rotates relative to the base 5 in the horizontal plane, the mounting bracket 3 can drive the optical load compartment 1 to rotate simultaneously.

The mounting bracket 3 may be a U-shaped frame structure as shown in fig. 1, or may be a rectangular frame structure, or may be other geometric structures according to requirements.

Preferably, the mounting bracket 3 may be configured as a U-shaped frame structure to facilitate the mounting and dismounting of the optical load compartment 1.

In this embodiment, since the azimuth axis 4 enables the mounting bracket 3 to move at a uniform speed in the horizontal plane relative to the base 5, the rotation speed of a single infrared camera in a 360-degree rotation range is kept unchanged, the image capturing speed for each azimuth is the same, and the accuracy of the synthesized panoramic image is effectively improved.

Meanwhile, as the locking piece is arranged in the pitching shaft system 2, in the rotating process of the mounting bracket 3, the locking piece can effectively ensure that the pitch angles of the optical load cabin 1 and the mounting bracket 3 are unchanged, so that the shooting range of the infrared camera in the rotating process is kept fixed, the shooting range caused by the change of the pitch angle in the rotating process is prevented from moving up and down, and the precision of the synthesized panoramic image is improved.

On the basis of the above embodiment, in order to realize that the mounting bracket 3 rotates at a constant speed in a horizontal plane relative to the base 5, the azimuth axis system 4 may include an azimuth spindle 41, an azimuth bearing 44, an azimuth motor 42, an azimuth motor fixing seat 43 for mounting the azimuth motor 42, an azimuth encoder 45 for feeding back rotation angle information, and an azimuth control device, the azimuth motor 42 includes a torque motor, the azimuth motor fixing seat 43 is connected with the base 5, and the azimuth spindle 41 is connected with the mounting bracket 3; the azimuth spindle 41 is installed in an azimuth motor fixing seat 43 through an azimuth bearing 44, and the azimuth motor 42 is connected with an azimuth control device, so that the azimuth control device controls the azimuth motor 42 to directly drive the azimuth spindle 41; the position encoder 45 is arranged in the inner cavity of the base 5, the position encoder 45 is sleeved with the position spindle 41, and the position control device is connected with the position encoder 45.

It should be noted that the orientation control device is connected to the orientation motor 42 and the orientation encoder 45, and the connection here may be physical connection, may be electrical connection, and may of course be signal connection implemented by WIFI or the like.

The azimuth motor 42 includes a torque motor, and since the output rotation torque of the torque motor is constant, the driving torque applied to the azimuth spindle 41 can be kept constant, thereby achieving a uniform rotation of the azimuth spindle 41.

The azimuth encoder 45 is sleeved with the azimuth spindle 41 and is used for acquiring the rotation angle information of the azimuth spindle 41 and transmitting the rotation angle information to the azimuth control device connected with the azimuth spindle so that the azimuth control device can adjust the azimuth control instruction output to the azimuth motor 42 according to the rotation angle information and adjust the output torque of the azimuth motor 42 through the azimuth control instruction.

In the embodiment, the torque motor is used for driving the azimuth spindle 41, so that the driving torque on the azimuth spindle 41 is constant, the uniform rotation of the azimuth spindle 41 is ensured, the uniform rotation of the infrared camera in the shooting process is realized, the accuracy of the panoramic image is improved, and the problem of pattern blurring caused by too low azimuth rotation speed accuracy is avoided.

In addition, the azimuth spindle 41 is directly driven by the azimuth motor 42, so that the load of the azimuth motor 42 is reduced, the driving power of the azimuth motor 42 is low, the power consumption is low, the service life and the reliability of the azimuth motor 42 under the long-term continuous rotation working condition are prolonged, and the maintenance frequency is reduced; at the same time, the current of the azimuth motor 42 decreases, and the influence on the image signal decreases.

Preferably, the orientation control device may be provided as an orientation control circuit board. In order to save the installation space and improve the space utilization, it is preferable that the azimuth control circuit board is installed in the inner cavity of the base 5.

Preferably, an azimuth spindle flange may be disposed on an end surface of the azimuth spindle 41 close to the mounting bracket 3, the azimuth spindle flange is provided with a plurality of threaded holes for connecting with the mounting bracket 3, and the threaded holes are uniformly distributed in a circumferential direction of the azimuth spindle flange.

The size of the threaded holes, the number of the threaded holes and the distance from the circle center of the threaded holes to the axis of the directional main shaft 41 are determined according to the requirements in actual production and the like.

Preferably, the azimuth bearing 44 may be a pair of angular ball bearings to eliminate radial runout and axial runout between the azimuth motor fixing base 43 and the azimuth spindle 41.

The specific specification of the angular contact ball bearing is determined according to the requirements in actual production.

On the basis of the above embodiment, in order to realize the pitch change of the optical load compartment 1 relative to the mounting bracket 3, the pitch axis system 2 includes a first pitch axis 21, a second pitch axis 22, a worm gear device connected to the first pitch axis 21, a pitch motor 25 driving the worm gear device, a pitch encoder 26 for feeding back pitch angle information, and a pitch control device, an output shaft of the pitch motor 25 is connected to the worm gear device, and both the pitch motor 25 and the pitch encoder 26 are connected to the pitch control device; first every single move axle 21, second every single move axle 22 all install perpendicularly between installing support 3 and optics load cabin 1, first every single move axle 21 and second every single move axle 22 respectively with optics load cabin 1 width direction's both ends fixed connection, first every single move axle 21 and second every single move axle 22 all with installing support 3 rotatable coupling.

It should be noted that the pitch control device is connected to the pitch motor 25 and the pitch encoder 26, and the connection here may be physical connection, may be electrical connection, and may of course be signal connection implemented by WIFI or the like.

Preferably, the pitch motor 25 may be provided as a stepping motor, and drives the first pitch shaft 21 and the second pitch shaft 22 to rotate in units of a pitch angle. The size of the angular displacement represented by the step angle is determined according to the pitch angle precision of the pitch axis system 2 required in actual production.

Preferably, the first pitch axis 21 and the second pitch axis 22 may be provided with the same size, and both are collectively referred to as a pitch axis.

Preferably, referring to fig. 2, the pitch encoder 26 can be sleeved outside the first pitch axis 21 to reduce the volume of the pitch axis system 2.

Preferably, the worm gear and worm device may include a worm wheel 23 connected to the first pitch shaft 21 and a worm 24 connected to the pitch motor 25, the worm wheel 23 being engaged with the worm 24; the axis of the worm 24 is perpendicular to the bottom surface of the mounting bracket 3.

When the pitch angle needs to be adjusted, the pitch motor 25 drives the worm gear device to rotate, so as to drive the worm gear device to rotate with the first pitch shaft 21 and the second pitch shaft 22, and the first pitch shaft 21 and the second pitch shaft 22 are both fixedly connected with the optical load compartment 1 and rotatably connected with the mounting bracket 3, so that the optical load compartment 1 rotates relative to the mounting bracket 3; the pitch encoder 26 detects the pitch angle information and transmits it to the pitch control device, which adjusts a pitch control command output to the pitch motor 25 according to the pitch angle information to control the pitch motor 25 to stop rotating after the target pitch angle is reached.

In this embodiment, since the worm gear device has a reverse self-locking function, it is avoided that the first pitch shaft 21 and the second pitch shaft 22 reversely rotate under the action of the external force after the pitch motor 25 stops rotating and the pitch angle is fixed, so that the real-time pitch angle deviates from the target pitch angle, and the panoramic shooting precision is improved.

Preferably, please refer to fig. 4, the pitch axis 2 may be disposed in the mounting bracket 3 to save the required mounting space, improve the space utilization, and achieve the miniaturization of the infrared panoramic shooting turntable.

Preferably, the pitch control means may be provided as a pitch control circuit board. In order to save the installation space and improve the space utilization, it is preferable that the pitch control circuit board is installed in the installation bracket 3.

On the basis of the above embodiment, for further locking the pitch angle, the locking member may comprise a brake 27 sleeved on the second pitch shaft 22, and the brake 27 is connected with the pitch control device, so that the brake 27 releases the second pitch shaft 22 when the pitch angle needs to be adjusted, and the brake 27 holds the second pitch shaft 22 after the pitch angle is reached.

In the embodiment, the brake 27 is arranged as a locking member, the locking mode is reliable and stable, and the locking state can be maintained without long-time electrification.

In addition, the brake 27 can eliminate the pitch shaft looseness caused by the backlash of the worm gear device.

It should be noted that the first and second pitch axes 21 and 22 in the present application are only used to distinguish the difference of the positions, and do not limit the sequence.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The infrared panoramic image shooting turntable provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. An infrared panoramic image shooting turntable is characterized by comprising a base (5), an optical load cabin (1) for mounting an infrared camera and an image stabilizing device thereof, a mounting bracket (3) for mounting the optical load cabin (1), an azimuth axis system (4) and a pitching axis system (2), wherein the azimuth axis system (4) is connected with the mounting bracket (3) and the base (5) so as to drive the mounting bracket (3) to rotate relative to the base (5) at a constant speed in a horizontal plane;

the pitching shafting (2) is connected with the optical load compartment (1) and the mounting bracket (3) so as to change the pitch angle of the optical load compartment (1) relative to the mounting bracket (3);

and a locking piece for locking the pitch angle of the optical load cabin (1) is arranged in the pitch shaft system (2).

2. The infrared panoramic image shooting turntable according to claim 1, wherein the azimuth axis system (4) comprises an azimuth spindle (41), an azimuth bearing (44), an azimuth motor (42), an azimuth motor fixing base (43) for mounting the azimuth motor (42), an azimuth encoder (45) for feeding back rotation angle information, and an azimuth control device, the azimuth motor (42) comprises a torque motor, the azimuth motor fixing base (43) is connected with the base (5), and the azimuth spindle (41) is connected with the mounting bracket (3);

the azimuth spindle (41) is installed in the azimuth motor fixing seat (43) through the azimuth bearing (44), and the azimuth motor (42) is connected with the azimuth control device, so that the azimuth control device controls the azimuth motor (41) to directly drive the azimuth spindle (41);

the azimuth encoder (45) is installed in the inner cavity of the base (5), the azimuth encoder (45) is sleeved with the azimuth spindle (41), and the azimuth control device is connected with the azimuth encoder.

3. The infrared panoramic image shooting turntable according to claim 2, wherein an azimuth spindle flange is provided on an end surface of the azimuth spindle (41) close to the mounting bracket (3), a plurality of threaded holes for connecting with the mounting bracket (3) are provided on the azimuth spindle flange, and the threaded holes are uniformly distributed in a circumferential direction of the azimuth spindle flange.

4. The infrared panorama image photographing turntable according to claim 2, wherein the azimuth bearing (44) comprises a pair of angular contact ball bearings to eliminate radial runout and axial runout between the azimuth motor fixing base (43) and the azimuth spindle (41).

5. The infrared panoramic image photographing turntable according to any one of claims 1 to 4, wherein the pitch axis system (2) comprises a first pitch axis (21), a second pitch axis (22), a worm gear device connected with the first pitch axis (21), a pitch motor (25) driving the worm gear device, a pitch encoder (26) for feeding back pitch angle information, and a pitch control device, wherein an output shaft of the pitch motor (25) is connected with the worm gear device, and the pitch motor (25) and the pitch encoder (26) are both connected with the pitch control device;

the first pitching shaft (21) and the second pitching shaft (22) are vertically installed between the mounting support (3) and the optical load cabin (1), the first pitching shaft (21) and the second pitching shaft (22) are fixedly connected with two ends of the optical load cabin (1) in the width direction respectively, and the first pitching shaft (21) and the second pitching shaft (22) are rotatably connected with the mounting support (3).

6. The infrared panoramic image shooting turntable according to claim 5, characterized in that the locking member comprises a brake (27) sleeved with the second pitch shaft (22), and the brake (27) is connected with the pitch control device, so that the brake (27) releases the second pitch shaft (22) when the pitch angle needs to be adjusted, and the brake (27) holds the second pitch shaft (22) after the pitch angle is reached.

7. The infrared panoramic image photographing turntable according to claim 5, wherein the tilt encoder (26) is sleeved outside the first tilt shaft (21).

8. The infrared panoramic image photographing turntable according to claim 7, wherein the worm gear and worm means includes a worm wheel (23) connected to the first pitch shaft (21) and a worm (24) connected to the pitch motor (25), the worm wheel (23) being engaged with the worm (24);

the axis of the worm (24) is perpendicular to the bottom surface of the mounting bracket (3).