A multi-camera photographic device

Abstract

The utility model discloses a kind of multi-camera shooting devices, including gimbal and multiple cameras being set on gimbal, gimbal includes base and gimbal support, gimbal support is movably arranged on base, at least part camera is fixed camera being fixedly set on gimbal support, the optical axis of each fixed camera is consistent, the rest camera is all movable camera, movable camera movably arranged on gimbal support and is configured with the adjusting mechanism for making its optical axis with the optical axis of fixed camera consistent, with movable camera itself optical axis as x axis, movable camera has the first adjusting degree of freedom of rotating around Y axis and the second adjusting degree of freedom of rotating around Z axis.The utility model movable camera is set on adjusting mechanism, adjusting mechanism structure is simple, convenient to operate, the first adjusting degree of freedom and the second adjusting degree of freedom of movable camera can be adjusted by adjusting mechanism, and then the optical axis of movable camera can be adjusted, to realize the consistency of the optical axis of each camera on gimbal.

Description

Technical Field

[0001] This utility model relates to the field of security monitoring technology, and in particular to a multi-camera shooting device. Background Technology

[0002] Multi-camera shooting devices, equipped with multiple cameras, are increasingly popular due to their ability to acquire more realistic image information. In existing security monitoring systems, multi-camera integrated pan-tilt units are becoming more common. While multiple cameras can observe and monitor the same target, inconsistencies in the optical axes of the cameras lead to significant deviations in the target observed by each camera, severely impacting the accuracy and positioning precision of outdoor monitoring pan-tilt units. Therefore, a multi-camera shooting device is urgently needed to solve these problems. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a multi-camera shooting device, including a gimbal and multiple cameras mounted on the gimbal. The gimbal includes a base and a gimbal bracket, with the gimbal bracket movably mounted on the base. At least some of the cameras are fixed cameras mounted on the gimbal bracket, with all fixed cameras having the same optical axis. The remaining cameras are movable cameras, each movable camera being movably mounted on the gimbal bracket and equipped with an adjustment mechanism for aligning its optical axis with that of the fixed cameras. With the optical axis of the movable camera itself as the x-axis, the movable camera has a first degree of freedom of rotation about the Y-axis and a second degree of freedom of rotation about the Z-axis.

[0004] Furthermore, the adjustment mechanism includes a mounting frame, a first adjustment frame, and a second adjustment frame. The movable camera is mounted on the first adjustment frame, and the mounting frame is mounted on the gimbal bracket. The first adjustment frame is hinged to the second adjustment frame and connected to a first adjustment unit for adjusting the first degree of freedom of the movable camera. The second adjustment frame is hinged to the mounting frame and connected to a second adjustment unit for adjusting the second degree of freedom of the movable camera.

[0005] Furthermore, the first adjustment unit includes a first adjustment member and a first elastic member. The first adjustment member is disposed at the end of the first adjustment frame away from the hinge point. The first adjustment frame and the second adjustment frame are connected by the first adjustment member and the distance between their connection points is adjustable. The first elastic member is sleeved on the first adjustment member and its two ends abut against the first adjustment frame and the second adjustment frame, respectively.

[0006] Furthermore, the first adjusting frame is provided with a first bending portion, and the second adjusting frame is provided with a second bending portion. The first bending portion and the second bending portion are hinged together. At least one of the first bending portion and the second bending portion is provided with a first hinge hole, and the axial direction of the first hinge hole is parallel to the Y-axis.

[0007] Furthermore, the second adjustment unit includes a second adjustment member and a second elastic member. The second adjustment member is disposed at the end of the mounting frame away from the hinge point. The second adjustment frame and the mounting frame are connected by the second adjustment member and the distance between their connection points is adjustable. The second elastic member is sleeved on the second adjustment member and its two ends abut against the second adjustment frame and the mounting frame, respectively.

[0008] Furthermore, the second adjusting frame is provided with a third bending portion, the mounting frame is provided with a fourth bending portion, the second adjusting member connects the third bending portion and the fourth bending portion, the second elastic member is sleeved on the second adjusting member and its two ends abut against the third bending portion and the fourth bending portion respectively, and the elastic direction of the second elastic member is parallel to the Y-axis.

[0009] Furthermore, the first adjusting frame is also provided with a first locking member for locking the first adjusting frame onto the second adjusting frame.

[0010] Furthermore, the second adjustment frame is also provided with a second locking element for locking the second adjustment frame onto the mounting frame.

[0011] Furthermore, the gimbal also includes multiple cabins, each cabin being equipped with at least one fixed camera and / or at least one movable camera, and at least one of the cabins being movably mounted on the gimbal support.

[0012] Furthermore, the gimbal bracket includes a support part and a support platform. The support part is rotatably mounted on the base, and the support platform is hinged to the support part and can rotate around the hinge point. Each of the fixed camera and the movable camera is mounted on the support platform.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0014] The multi-camera shooting device provided by this utility model has a movable camera mounted on an adjustment mechanism. The adjustment mechanism has a simple structure and is easy to operate. The first and second degrees of freedom of the movable camera can be adjusted through the adjustment mechanism, thereby adjusting the optical axis of the movable camera on the adjustment mechanism. This achieves the consistency of the optical axes of each camera on the pan-tilt unit. When each camera moves synchronously under the drive of the pan-tilt unit bracket, it can be aimed at the same target for observation, improving the accuracy and positioning accuracy of the monitoring pan-tilt unit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the multi-camera shooting device provided by this utility model;

[0017] Figure 2 A partial schematic diagram of the multi-camera shooting device provided by this utility model;

[0018] Figure 3 A schematic diagram of the adjustment mechanism in the multi-camera shooting device provided by this utility model;

[0019] Figure 4 A partial schematic diagram of the adjustment mechanism in the multi-camera shooting device provided by this utility model;

[0020] Figure 5 This is a partial schematic diagram of the adjustment mechanism in the multi-camera shooting device provided by this utility model.

[0021] 1-Gimbal; 11-Base; 12-Support; 121-Rotating shaft; 13-Support platform; 14-Housing; 141-Observation window; 2-Adjustment mechanism; 21-First adjustment frame; 211-Camera mounting hole; 212-First bending part; 213-First hinge hole; 214-First hinge screw; 22-Second adjustment frame; 221-Second bending part; 222-Second hinge hole; 223-Second hinge screw; 224-Third bending part; 225-Oval hole; 23-Mounting frame; 231-Light transmission hole; 232-Fourth bending part; 24-First adjustment unit; 241-First adjustment component; 242-First elastic component; 25-Second adjustment unit; 251-Second adjustment component; 252-Second elastic component; 26-First locking component; 27-Second locking component; 3-First camera; 4-Second camera; 5-Third camera. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] As per the instruction manual Figure 1-3 As shown, this utility model provides a multi-camera shooting device, including a gimbal 1 and multiple cameras mounted on the gimbal 1. The gimbal includes a base 11 and a gimbal bracket, with the gimbal bracket movably mounted on the base 11. At least some of the cameras are fixed cameras mounted on the gimbal bracket, with all fixed cameras having the same optical axis. The remaining cameras are movable cameras, each movable camera being movably mounted on the gimbal bracket and equipped with an adjustment mechanism 2 for aligning its optical axis with that of the fixed cameras. Taking the optical axis of the movable camera itself as the x-axis, the movable camera has a first degree of freedom of rotation around the Y-axis and a second degree of freedom of rotation around the Z-axis. In this embodiment, each fixed camera is mounted on the gimbal bracket with the same optical axis, and each movable camera is equipped with an adjustment mechanism for adjusting its optical axis and aligning it with that of the fixed camera. The adjustment mechanism 2 can drive the movable camera to rotate around the Y-axis and around the Z-axis to complete the optical axis adjustment of the movable camera.

[0027] Specifically, the pan-tilt unit 1 is equipped with multiple cameras, which can be two, three, or more. Each camera observes and monitors the same target. Due to the different errors of each camera, during use, the optical axes of multiple cameras may be inconsistent, resulting in significant differences in the target observed by each camera, affecting the accuracy and positioning precision of the outdoor monitoring pan-tilt unit. The consistency of the optical axes of multiple cameras refers to the parallelism of the optical axes of each camera or the convergence of the optical axes of all cameras at the same point, which is the location of the target. In this embodiment, in order to observe and monitor the same target, it is necessary to ensure that the optical axes of all cameras converge at the same point. Therefore, it is necessary to adjust the camera optical axes to ensure consistency and improve the accuracy and positioning precision of the monitoring pan-tilt unit.

[0028] In an optimized implementation, to facilitate the adjustment of the optical axis of each moving camera, each moving camera is equipped with an adjustment mechanism 2. Each adjustment mechanism 2 includes a mounting frame 23, a first adjustment frame 21, and a second adjustment frame 22. The moving camera is mounted on the corresponding first adjustment frame 21, and the mounting frame 23 is mounted on the gimbal bracket. The first adjustment frame 21 is hinged to the second adjustment frame 22 and connected to a first adjustment unit 24 for adjusting the first degree of freedom of the moving camera. The second adjustment frame 22 is hinged to the mounting frame 23 and connected to a second adjustment unit 25 for adjusting the second degree of freedom of the moving camera. The first adjustment unit can drive the moving camera to rotate around the Y-axis, and the second adjustment unit can drive the moving camera to rotate around the Z-axis, so as to complete the adjustment of the optical axis of the moving camera and make the optical axis of the moving camera consistent with that of the fixed camera.

[0029] As per the instruction manual Figure 1 As shown, the gimbal bracket includes a support part 12 and a support platform 13. Each camera is mounted on the support platform 13. The support part 12 is horizontally rotatable on a base 11. The support part 12 can rotate horizontally on the base 11 to adjust the horizontal position of the support platform 13, thereby adjusting the horizontal position of each camera on the support platform 13. The support platform 13 is hinged to the support part 12 and can rotate around the hinge point. The support part 12 is provided with a rotating shaft 121. The hinge part of the support platform 13 is sleeved on the rotating shaft 121 and can rotate around the rotating shaft 121, thereby adjusting the pitch angle of each camera. The support platform 13 is supported on the top of the support part 12, which provides support and increases the strength of the support platform 13. By adjusting the horizontal rotation and pitch angle of each camera on the support platform 13, the optical axes of multiple cameras can be adjusted simultaneously to ensure they all face the target position.

[0030] Specifically, the support platform 13 is a cantilever structure with its middle section hinged to the support section 12 and its two ends suspended. Each camera is respectively installed at one of the cantilevered ends of the support platform 13. In this embodiment, there are three cameras, referred to as the first camera 3, the second camera 4, and the third camera 5. The first camera 3 is a fixed camera, while the second camera 4 and the third camera 5 are movable cameras. The first camera 3 is fixedly installed on the support platform 13 as a calibration reference. The second camera 4 and the third camera 5 are respectively installed on the support platform 13 through adjustment mechanisms 2. The optical axes of the second camera 4 and the third camera 5 are adjusted by the adjustment mechanisms 2 to ensure consistency with the optical axis of the first camera 3. The first camera 3 is installed on one cantilevered end of the support platform 13, and the second camera 4 and the third camera 5 are installed on the other cantilevered end of the support platform 13. There are two adjustment mechanisms 2, which are configured one-to-one with the second camera 4 and the third camera 5.

[0031] In one embodiment, the first camera 3 is a thermal imaging camera, the second camera 4 is a laser camera, and the third camera 5 is a visible light camera. Of course, the model of each camera can be set according to usage requirements. The number and placement of the cameras mounted on the gimbal 1 can also be set as needed.

[0032] Preferably, the support platform 13 is provided with two cabins 14, respectively located at the two cantilevered ends of the support platform 13. The first camera 3 is located in one cabin 14, and the second camera 4 and the third camera 5 are located in the other cabin 14. Each cabin 14 is provided with an observation window 141 through which the corresponding camera lens can pass. The cameras are located in the cabins 14, which can provide a certain degree of waterproofing and dustproofing, and at the same time protect the cameras from damage due to external forces when used outdoors.

[0033] Preferably, at least one of the aforementioned cabins 14 is movably mounted on the support platform 13. The cabin 14 is hinged to the support platform 13 and can rotate vertically around its axis, thereby adjusting the optical axis of the fixed camera or the moving camera to a certain extent, so that the optical axes of the moving camera and the fixed camera are aligned. For ease of description, the cabin 14 equipped with the first camera 3 is referred to as the first cabin, and the cabin 14 equipped with the second camera 4 and the third camera 5 is referred to as the second cabin. The first cabin and / or the second cabin are movably mounted on the support platform 13. In use, after the support part 12 is horizontally rotated into position on the base 11, the optical axis of the fixed camera can be further adjusted by rotating the first cabin to ensure adjustment accuracy; the optical axis of the moving camera can also be further adjusted by rotating the second cabin to ensure that the optical axis of the moving camera is aligned with the optical axis of the fixed camera, improving the flexibility and accuracy of adjustment.

[0034] In this embodiment, the first camera 3 is a calibration camera. The second camera 4 and the third camera 5 need to be calibrated with the first camera 3 as a reference to ensure that the optical axes of the three cameras are consistent. The lenses of the first camera 3, the second camera 4, and the third camera 5 are all positioned facing the target. The adjustment of the third camera 5 is the same as that of the second camera 4. For ease of description, the adjustment of the second camera 4 is taken as an example. With the optical axis of the second camera as the X-axis, the Y-axis perpendicular to the X-axis, and the Z-axis parallel to the vertical, an XYZ coordinate system is established. The second camera 4 adjusts its pitch angle and left and right swing position through the adjustment mechanism 2, so that the optical axes of multiple cameras in the same gimbal device can be kept consistent, thereby improving the accuracy of the multi-camera gimbal in observing and monitoring the target scene.

[0035] As per the instruction manual Figure 4 The diagram shows the structure of the first adjustment frame 21 and the second adjustment frame 22. The first adjustment frame 21 has a camera mounting hole 211, through which the camera is mounted. A vertical gap exists between the first adjustment frame 21 and the second adjustment frame 22 for adjustment. The first adjustment frame 21 and the second adjustment frame 22 are hinged, meaning the first adjustment frame 21 can rotate around the hinge point, allowing the camera to rotate around the Y-axis, thus adjusting the camera's pitch angle. The first adjustment unit 24 includes a first adjustment member 241 and a first elastic member 242. The first adjustment member 241 is located at the end of the first adjustment frame 21 furthest from the hinge point. The first adjustment frame 21 and the second adjustment frame 22 are connected by the first adjustment member 241, and the distance between their connection point is adjustable. The first elastic member 242 is sleeved on the first adjustment member 241, with both ends abutting against the first adjustment frame 21 and the second adjustment frame 22, respectively. Specifically, during the adjustment process, the first elastic element 242 is in a compressed state, applying a certain force to the first adjusting frame 21 and the second adjusting frame 22, so that when the first adjusting element 241 is adjusted, the first elastic element 242 can act on the first adjusting frame 21 and the second adjusting frame 22. The first adjusting element 241 is preferably a spring.

[0036] In an optimized implementation, the first adjusting frame 21 has a first bent portion 212, and the second adjusting frame 22 has a second bent portion 221. The first bent portion 212 and the second bent portion 221 are hinged together. At least one of the first bent portion 212 and the second bent portion 221 has a first hinge hole 213, the axial direction of which is parallel to the Y-axis. The first hinge hole 213 is a through hole or a threaded hole. The first bent portion 212 is formed by bending on the first adjusting frame 21. The first bent portion 212 and the first adjusting frame 21 are an integral structure with good integrity and high strength. No additional parts are required for connection, which simplifies the assembly process and reduces material costs. The formation of the second bent portion 221 is the same as that of the first bent portion 212, and will not be described again here.

[0037] In this embodiment, the first bending portion 212 and the second bending portion 221 bend in the same direction, both bending upwards. The second bending portion 221 is located outside the first bending portion 212. Both the first bending portion 212 and the second bending portion 221 are provided with a first hinge hole 213. The first hinge hole 213 on the first bending portion 212 is a threaded hole, and the first hinge hole 213 on the second bending portion 221 is a through hole. The first hinge screw 214 passes through the through hole and is threadedly connected to the threaded hole, thereby locking the first bending portion 212 and the second bending portion 221. The structure is simple and easy to assemble. The first adjusting frame 21 and the second adjusting frame 22 can be hinged by the first hinge screw 214. At this time, the first adjusting frame 21 can rotate around the first hinge screw 214. The first adjusting unit 24 can drive the first adjusting frame 21 to rotate around the first hinge screw 214, thereby adjusting the pitch angle of the moving camera.

[0038] Preferably, the first hinge screw 214 is a screw with a spring clip, which can provide better anti-loosening, anti-vibration, and anti-reverse locking functions.

[0039] As one specific implementation, the first adjusting frame 21 is provided with two first bending portions 212, which are respectively arranged on both sides of the first adjusting frame 21. The second adjusting frame 22 is provided with two second bending portions 221, which are arranged one-to-one with the first bending portions 212. Each first bending portion 212 is provided with a first hinge screw 214. By setting two hinge points, the rotation of the first adjusting frame 21 can be made more stable, eliminating deflection and swaying, and making the rotation smoother.

[0040] In one specific embodiment, the first adjusting member 241 is a screw. The first adjusting frame 21 has a through hole for the screw to pass through, and the screw is clearance-fitted with the through hole. The second adjusting frame 22 has a threaded hole for threaded connection with the screw. After the screw passes through the through hole on the first adjusting frame 21, it is threadedly connected to the second adjusting frame 22. The screw nut abuts against the first adjusting frame 21. The first elastic member 242 is sleeved on the screw, and its two ends abut against the first adjusting frame 21 and the second adjusting frame 22 respectively. By screwing in and out the screw, the first adjusting frame 21 can rotate around the first hinge screw 214, thereby realizing the up and down tilt movement of the camera on the first adjusting frame 21. When the tilt is adjusted to the target position, the rotation of the screw stops.

[0041] In an optimized implementation, the first adjustment frame 21 is further provided with a first locking member 26 for locking the first adjustment frame 21 onto the second adjustment frame 22. When the first adjustment frame is adjusted to the target position, the first locking member 26 locks the first adjustment frame 21 onto the second adjustment frame 22, preventing shaking during use and avoiding any impact on the accuracy of the camera's optical axis.

[0042] As one specific implementation, the first locking member 26 is a locking bolt. The first adjusting frame 21 is provided with a threaded hole that is threadedly connected to the locking bolt. The locking bolt is screwed into the corresponding threaded hole, and the front end of the locking bolt abuts against the second adjusting frame 22, thereby fixing the first adjusting frame 21 onto the second adjusting frame 22.

[0043] As per the instruction manual Figure 5 The diagram shows the structure of the mounting frame 23 and the second adjustment frame 22. The mounting frame 23 is an L-shaped frame with a vertical plate and a horizontal plate, which are integrally formed and can be bent. The mounting frame 23 has good integrity and high strength. It is mounted on the support platform 13 via the vertical plate, which has a light-transmitting hole 231 for the camera lens to pass through. The second adjustment frame 22 can rotate relative to the mounting frame 23 around the Z-axis, meaning it can swing left and right to adjust the camera's optical axis. The second adjustment unit 25 includes a second adjustment member 251 and a second elastic member 252. The second adjustment member 251 is located at the end of the mounting frame 23 furthest from the hinge point. The second adjustment frame 22 and the mounting frame 23 are connected by the second adjustment member 251, and the distance between their connection points is adjustable. The second elastic member 252 is sleeved on the second adjustment member 251, with both ends abutting against the second adjustment frame 22 and the mounting frame 23, respectively.

[0044] In an optimized implementation, at least one of the hinge points of the second adjustment bracket 22 and the mounting bracket 23 is provided with a second hinge hole 222, the axial direction of which is parallel to the Z-axis. The second hinge hole 222 is either a through hole or a threaded hole. Both the second hinge hole 222 and the first hinge hole 213 are located at the end near the camera lens.

[0045] In this embodiment, both the second adjustment frame 22 and the mounting frame 23 are provided with second hinge holes 222. The second hinge hole 222 on the mounting frame 23 is a through hole, and the second hinge hole 222 on the second adjustment frame 22 is a threaded hole. The second hinge screw 223 passes through the through hole and is threadedly connected to the threaded hole, thereby locking the second adjustment frame 22 and the mounting frame 23. At this time, the second adjustment frame 22 can rotate around the second hinge screw 223, thereby allowing the moving camera to swing left and right to adjust the optical axis.

[0046] Preferably, the second hinge screw 223 is a screw with a spring clip, which can provide better anti-loosening, anti-vibration, and anti-return locking functions.

[0047] In an optimized implementation, the second adjusting frame 22 is provided with a third bending portion 224, and the mounting frame 23 is provided with a fourth bending portion 232. The formation of the third bending portion 224 and the fourth bending portion 232 is the same as that of the first bending portion 212, and will not be described again here. The bending directions of the third bending portion 224 and the fourth bending portion 232 are the same, both bending upwards, and the fourth bending portion 232 is located outside the third bending portion 224. There is a gap between the third bending portion 224 and the fourth bending portion 232. The second adjusting member 251 connects the third bending portion 224 and the fourth bending portion 232 and can adjust the gap between them. The second elastic member 252 is sleeved on the second adjusting member 251 and its two ends abut against the third bending portion 224 and the fourth bending portion 232 respectively. The elastic direction of the second elastic member 252 is parallel to the Y-axis. The second adjusting member 251 allows the second adjusting frame 22 to rotate around the second hinge screw 223, thereby enabling the left and right swinging motion of the movable camera on the first adjusting frame 21.

[0048] The second adjustment unit uses the same adjustment method as the first adjustment unit, which will not be described again here.

[0049] In an optimized implementation, the second adjustment frame 22 is further provided with a second locking member 27 for locking the second adjustment frame 22 onto the mounting frame 23. When the second adjustment frame 22 is adjusted to the target position, the second locking member 27 locks the second adjustment frame 22 onto the mounting frame 23, preventing shaking during use and avoiding any impact on the accuracy of the optical axis of the moving camera.

[0050] As one specific implementation, the second adjustment frame 22 is provided with a waist-shaped hole 225. The length direction of the waist-shaped hole 225 is consistent with the swing direction of the second adjustment frame 22. The mounting frame 23 is provided with a threaded hole corresponding to the position of the waist-shaped hole 225. The second locking member 27 is a locking screw. After the second adjustment frame 22 is adjusted to the target position, the second locking member 27 passes through the waist-shaped hole 225 and is threadedly connected to the threaded hole on the mounting frame 23, thereby locking the second adjustment frame 22 onto the mounting frame 23.

[0051] The multi-camera shooting device provided by this utility model can achieve high-precision manual adjustment of the target camera's pitch and lateral mounting angle through the first adjustment unit 24 for vertical tilt adjustment and the second adjustment unit for horizontal swing adjustment. On the same gimbal, with the first camera 3 as the reference, the adjustment mechanisms of the second camera 4 and the third camera 5 are adjusted in sequence, so that the optical axes of the second camera 4 and the third camera 5 are aligned with the optical axis of the first camera 3. When the three cameras move synchronously under the drive of the gimbal bracket, they can observe the same target, improving the accuracy of the multi-camera gimbal in observing and monitoring the target scene.

[0052] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0053] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A multi-camera shooting device, comprising a gimbal and a plurality of cameras mounted on the gimbal, characterized in that, The gimbal includes a base and a gimbal bracket. The gimbal bracket is movably mounted on the base. At least some of the cameras are fixed cameras mounted on the gimbal bracket, and the optical axes of all the fixed cameras are aligned. The remaining cameras are movable cameras. Each movable camera is movably mounted on the gimbal bracket and is equipped with an adjustment mechanism for aligning its optical axis with that of the fixed camera. With the optical axis of the movable camera itself as the x-axis, the movable camera has a first degree of freedom of adjustment about the Y-axis and a second degree of freedom of adjustment about the Z-axis.

2. The multi-camera shooting device according to claim 1, characterized in that, The adjustment mechanism includes a mounting frame, a first adjustment frame, and a second adjustment frame. The movable camera is mounted on the first adjustment frame, and the mounting frame is mounted on the gimbal bracket. The first adjustment frame is hinged to the second adjustment frame and connected to a first adjustment unit for adjusting the first degree of freedom of the movable camera. The second adjustment frame is hinged to the mounting frame and connected to a second adjustment unit for adjusting the second degree of freedom of the movable camera.

3. The multi-camera shooting device according to claim 2, characterized in that, The first adjustment unit includes a first adjustment member and a first elastic member. The first adjustment member is disposed at the end of the first adjustment frame away from the hinge point. The first adjustment frame and the second adjustment frame are connected by the first adjustment member and the distance between their connection points is adjustable. The first elastic member is sleeved on the first adjustment member and its two ends abut against the first adjustment frame and the second adjustment frame, respectively.

4. The multi-camera shooting device according to claim 2, characterized in that, The first adjusting frame is provided with a first bending part, and the second adjusting frame is provided with a second bending part. The first bending part and the second bending part are hinged together. At least one of the first bending part and the second bending part is provided with a first hinge hole. The axial direction of the first hinge hole is parallel to the Y-axis.

5. The multi-camera shooting device according to claim 2, characterized in that, The second adjustment unit includes a second adjustment member and a second elastic member. The second adjustment member is disposed at the end of the mounting frame away from the hinge point. The second adjustment frame and the mounting frame are connected by the second adjustment member and the distance between their connection points is adjustable. The second elastic member is sleeved on the second adjustment member and its two ends abut against the second adjustment frame and the mounting frame, respectively.

6. The multi-camera shooting device according to claim 5, characterized in that, The second adjusting frame is provided with a third bending part, and the mounting frame is provided with a fourth bending part. The second adjusting member connects the third bending part and the fourth bending part. The second elastic member is sleeved on the second adjusting member and its two ends abut against the third bending part and the fourth bending part respectively. The elastic direction of the second elastic member is parallel to the Y-axis.

7. The multi-camera shooting device according to claim 2, characterized in that, The first adjustment frame is also provided with a first locking member for locking the first adjustment frame onto the second adjustment frame.

8. The multi-camera shooting device according to claim 2, characterized in that, The second adjustment frame is also provided with a second locking element for locking the second adjustment frame onto the mounting frame.

9. The multi-camera shooting device according to claim 1, characterized in that, The gimbal also includes multiple cabins, each of which is equipped with at least one fixed camera and / or at least one movable camera, and at least one of the cabins is movably mounted on the gimbal support.

10. The multi-camera shooting device according to claim 1, characterized in that, The gimbal bracket includes a support part and a support platform. The support part is rotatably mounted on the base, and the support platform is hinged to the support part and can rotate around the hinge point. Each of the fixed camera and the movable camera is mounted on the support platform.

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