Target fixing device for correcting camera

Abstract

The utility model discloses a target fixing device for correcting a camera, and belongs to the technical field of camera auxiliary detection. Comprising a portal frame and a transverse mounting frame arranged between two side stand columns on the portal frame, and a background plate used for pasting a target is arranged on the transverse mounting frame; the transverse mounting frame is slidably connected to the side stand columns through linear guide rails arranged in the vertical direction, and a driving mechanism capable of driving the transverse mounting frame to ascend and descend is arranged on the portal frame. According to the target fixing device for correcting the camera, the height adjustability of the target in a certain range can be realized while the target plane is ensured to be parallel to the imaging plane, so that the correction requirements of different cameras can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to camera auxiliary detection technical field, especially involve a target fixing device for camera correction. BACKGROUND

[0002] With the rapid development of science and technology, the camera is increasingly widely used in various fields. In the process of producing the camera, due to the optical characteristics of the camera itself, the lens distortion, image blur and color deviation may occur, so the camera needs to be corrected before leaving the factory.

[0003] In the traditional camera correction process, the target is usually fixed on the fixing device for installing the target, and the image of the target is shot from different angles, heights, positions and distances, and then the image shot by the camera is analyzed and processed, and finally the correction parameters obtained are applied to the driving program or processing algorithm of the camera to realize the correction of the camera. The target is usually kept relatively static on the fixing device for installing the target to ensure the stability of the shot image. When different types and sizes of targets need to be replaced on the same fixing device, the target plane of the newly installed target needs to be parallel to the imaging plane of the camera. The imaging plane of the camera is usually fixed, and only the target plane of the newly installed target needs to be overlapped with the original target plane to avoid measurement error. When the traditional fixing device replaces the new target, it is difficult to ensure that the target plane of the newly installed target is overlapped with the original target plane, and the fixed target is extremely inconvenient for the camera correction process that needs to shoot different heights or dynamic targets, which greatly reduces the efficiency of camera correction. SUMMARY

[0004] The utility model aims at overcoming the insufficient in prior art, provides a target fixing device for camera correction, can realize the height adjustability of target in a certain range while ensuring that the target plane is parallel to the imaging plane, to adapt to the correction requirement of different cameras.

[0005] To achieve the above object, the utility model adopts the technical scheme of a target fixing device for camera correction, which comprises a gantry and a transversely arranged mounting frame between two side columns of the gantry, and a background plate for pasting a target is arranged on the mounting frame.

[0006] The mounting frame is connected to the side columns through a linear guide rail arranged in the vertical direction, and a driving mechanism is arranged on the gantry to drive the mounting frame to rise and fall.

[0007] Optionally, the driving mechanism comprises a transmission shaft driven by a motor and a first sprocket rotatably connected to the side column.

[0008] The second sprocket is arranged on the transmission shaft, the first sprocket and the second sprocket are in engagement transmission through a chain, one section of the chain is connected to the horizontal mounting frame, and the rotating shafts of the first sprocket and the second sprocket are perpendicular to the moving direction of the horizontal mounting frame.

[0009] Optionally, the number of the first sprocket, the second sprocket and the chain is two, and the two chains are symmetrically distributed along the horizontal mounting frame.

[0010] Optionally, one end of the horizontal mounting frame is slidably connected to the side column through the linear guide rail, and the other end of the horizontal mounting frame is provided with a plurality of groups of rollers, the side column corresponding to the end of the horizontal mounting frame is provided with a guide plate arranged in the vertical direction, and the plurality of groups of rollers are symmetrically clamped and rollingly connected to the guide plate.

[0011] Optionally, the top of the gantry is provided with a light supplementing lamp.

[0012] Optionally, the background plate is detachably connected to the horizontal mounting frame.

[0013] Optionally, one side of the background plate for pasting the target is smooth and flat.

[0014] Optionally, the bottom of the side column is provided with a mounting foot capable of being attached to the ground, and the light mounting foot plate is provided with a mounting hole for penetrating a bolt.

[0015] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the linear guide rail arranged in the vertical direction and the driving mechanism enable the horizontal mounting frame to smoothly ascend and descend in the vertical direction, so that the height position of the target background plate can be quickly and accurately adjusted according to actual requirements. Meanwhile, the horizontal mounting frame can perform uniform speed, acceleration and deceleration actions under the driving of the driving mechanism, so that the requirement of the camera for shooting dynamic targets can be met. Meanwhile, the target is fixed on the background plate in a pasting manner, so that the installation of the target is facilitated, and the dismounting of the target is also facilitated. The background plate serving as the positioning basis of the target can guarantee the uniqueness of the target plane through the linear guide rail, that is, the parallelism between the target plane and the imaging plane can be effectively guaranteed in the alternation of new and old targets, and the error of the camera correction is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in connection with the drawings and embodiments.

[0017] Figure 1 is the structure schematic diagram of the target fixing device for camera correction in the preferred embodiment of the utility model;

[0018] Figure 2It is the structure schematic view of the guide plate of one end of the horizontal installation frame in the preferred embodiment of the utility model through the roller rolling connection on the side stand column.

[0019] Wherein, 1, gantry; 101, side stand column; 2, horizontal installation frame; 3, background plate; 4, linear guide rail; 5, motor; 6, transmission shaft; 7, first chain wheel; 8, second chain wheel; 9, chain; 10, roller; 11, guide plate; 12, light supplementing lamp; 13, mounting foot base. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings and embodiments, these drawings are all simplified schematic view, just with the schematic way the basic structure of the utility model is explained, therefore it just shows the structure related with the utility model.

[0021] It should be noted that if the embodiment involves directional indications (such as up, down, bottom, top, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include one or more features. Unless otherwise specified and limited, the terms "set", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] As shown in Figures 1-2 A target fixing device for camera correction, comprising a gantry 1 and a horizontal installation frame 2 arranged between two side stand columns 101 on the gantry 1, the horizontal installation frame 2 is provided with a background plate 3 for pasting a target, the horizontal installation frame 2 is slidably connected to the side stand column 101 through a linear guide rail 4 arranged in the vertical direction, and the gantry 1 is provided with a driving mechanism capable of driving the horizontal installation frame 2 to rise and fall.

[0023] Specifically, by setting the linear guide rail 4 along the vertical direction and the driving mechanism, the transversely mounted rack 2 can smoothly ascend and descend in the vertical direction, so that the height position of the target background plate 3 can be quickly and accurately adjusted according to actual needs. At the same time, the transversely mounted rack 2 can perform uniform speed, acceleration, deceleration and other actions under the driving of the driving mechanism, which can meet the needs of the camera to shoot dynamic targets. In the technical solution, the target that can be pasted is a prior art, and the target is fixed on the background plate 3 by pasting, which facilitates the installation and removal of the target. The background plate 3 as the positioning basis of the target can ensure the uniqueness of the target plane through the linear guide rail 4, that is, the parallelism between the target plane and the imaging plane can be effectively ensured in the alternation of new and old targets, and the error of camera correction is reduced.

[0024] As shown above, Figure 1 the driving mechanism includes a transmission shaft 6 driven by a motor 5 and a first sprocket 7 rotatably connected to the side column 101. Among them, the transmission shaft 6 can be arranged on the gantry 1 through a bearing seat to increase the stability of the rotation of the transmission shaft 6. At the same time, the transmission shaft 6 is provided with a second sprocket 8, the first sprocket 7 and the second sprocket 8 are engaged and transmitted through the chain 9, one section of the chain 9 is connected to the transversely mounted rack 2, and the rotation axes of the first sprocket 7 and the second sprocket 8 are perpendicular to the moving direction of the transversely mounted rack 2. The motor 5 can drive the transversely mounted rack 2 to ascend and descend along the vertical direction through the first sprocket 7, the second sprocket 8 and the chain 9.

[0025] Further, as shown above, Figure 1 the number of the first sprocket 7, the second sprocket 8 and the chain 9 is two, and the two chains 9 are symmetrically distributed along the transversely mounted rack 2, that is, the motor 5 can drive the two first sprockets 7, the second sprockets 8 and the chains 9 to move synchronously, and at the same time, the two chains 9 can drive the transversely mounted rack 2 to ascend and descend, balance the resistance between the two ends of the transversely mounted rack 2 and the side column 101, and ensure that the transversely mounted rack 2 can stably ascend and descend. Above, in the technical solution, the motor 5 is a prior art, which can drive the transversely mounted rack 2 to accurately displace through the first sprocket 7, the second sprocket 8 and the chain 9, and itself has a self-locking function, which can make the transversely mounted rack 2 ascend or descend to a certain height and hover.

[0026] As shown above, Figure 1 , Figure 2As shown, one end of the transverse mounting frame 2 is connected to the side column 101 through the linear guide rail 4, and the other end of the transverse mounting frame 2 is provided with a plurality of groups of rollers 10, and the side column 101 corresponding to the end of the transverse mounting frame 2 is provided with a guide plate 11 arranged in the vertical direction, and the plurality of groups of rollers 10 are symmetrically clamped and rollingly connected to the guide plate 11. The linear guide rail 4 has high precision and stability in sliding connection, and the end of the roller 10 has smaller friction in rolling connection, so that higher movement speed can be achieved in the vertical direction. The combination of the two can ensure the stability of the overall movement of the transverse mounting frame 2 when adjusting the position, and also make the transverse mounting frame 2 more rapid and portable when adjusting the position. At the same time, one end adopts the linear guide rail 4, and the other end adopts the roller 10, which can reduce the installation precision of the transverse mounting frame 2 and the gantry 1, and does not need too much debugging, saving installation time and labor cost.

[0027] Further, in the embodiment, the top of the gantry 1 is provided with a light supplementing lamp 12 to improve the light adjustment of the target, eliminate the shadow interference when the camera shoots the target, ensure the uniformity of the illumination of each frame image, reduce the image difference caused by the change of illumination, and improve the accuracy of correction calculation.

[0028] Further, the background plate 3 is detachably connected to the transverse mounting frame 2. Specifically, the transverse mounting frame 2 and the background plate 3 can be positioned and installed through the angle plate connector in the prior art, and can be connected through bolts and the like fasteners. The installation is convenient, and the background plate 3 can be replaced to change different sizes according to the needs.

[0029] Further, one side of the background plate 3 for pasting the target is smooth and flat, which can provide a good positioning basis for the target, and also facilitate the pasting and tearing of the target.

[0030] Further, the bottom of the side column 101 is provided with a mounting foot 13 which can be attached to the ground. The mounting foot is provided with a mounting hole for penetrating a bolt, that is, the gantry 1 can be fixedly installed on the ground through the bolt and the like fasteners, and has better stability.

[0031] Working principle: The target can be fixed on the background plate 3 by pasting. One side of the background plate 3 for pasting the target is smooth and flat, which facilitates the installation and removal of the target. At the same time, the background plate 3 as the positioning basis of the target can ensure the uniqueness of the target plane through the linear guide rail 4, that is, the parallelism between the target plane and the imaging plane can be effectively ensured in the replacement of new and old targets.

[0032] Meanwhile, the motor 5 can drive the horizontal mounting frame 2 to ascend and descend in the vertical direction through the first sprocket wheel 7, the second sprocket wheel 8 and the chain 9, so that the height position of the target background plate 3 can be quickly and accurately adjusted according to actual needs. Meanwhile, the horizontal mounting frame 2 can perform uniform speed, acceleration, deceleration and other actions under the driving of the motor 5, and can meet the needs of the camera to shoot dynamic targets.

[0033] The above is based on the ideal embodiment of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A target fixing device for camera calibration, characterized by: The gantry (1) and the two side columns (101) are arranged between the horizontal mounting frame (2), and the background plate (3) for pasting targets is arranged on the horizontal mounting frame (2). The horizontal mounting frame (2) is slidably connected to the side column (101) through the linear guide rail (4) arranged in the vertical direction, and the driving mechanism capable of driving the horizontal mounting frame (2) to ascend and descend is arranged on the gantry (1).

2. The target fixing device for camera calibration according to claim 1, characterized in that: The driving mechanism comprises the transmission shaft (6) driven by the motor (5) and the first sprocket (7) rotatably connected to the side column (101). The second sprocket (8) is arranged on the transmission shaft (6), the first sprocket (7) and the second sprocket (8) are engaged and driven through the chain (9), one section of the chain (9) is connected to the horizontal mounting frame (2), and the rotation axes of the first sprocket (7) and the second sprocket (8) are perpendicular to the moving direction of the horizontal mounting frame (2).

3. The target fixing device for camera calibration according to claim 2, characterized in that: The number of the first sprocket (7), the second sprocket (8) and the chain (9) is two, and the two chains (9) are symmetrically distributed along the horizontal mounting frame (2).

4. The target fixing device for camera calibration according to claim 1, characterized in that: One end of the horizontal mounting frame (2) is slidably connected to the side column (101) through the linear guide rail (4), and the other end of the horizontal mounting frame (2) is provided with a plurality of groups of rollers (10), the side column (101) corresponding to the end of the horizontal mounting frame (2) is provided with the guide plate (11) arranged in the vertical direction, and a plurality of groups of the rollers (10) are symmetrically clamped and rotatably connected to the guide plate (11).

5. The target fixture for camera calibration according to claim 1, wherein: The top of the gantry (1) is provided with the light supplementing lamp (12).

6. The target fixture for camera calibration according to claim 1, wherein: The background plate (3) is detachably connected to the horizontal mounting frame (2).

7. The target fixture for camera calibration according to claim 1, wherein: One side of the background plate (3) for pasting targets is smooth and flat.

8. The target fixture for camera calibration according to claim 1, wherein: The bottom of the side column (101) is provided with the mounting foot (13) capable of being attached to the ground, and the mounting hole for penetrating the bolt is arranged on the mounting foot.

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