A high-precision camera adjustment mechanism and a rangefinder

Abstract

The present invention discloses a high-precision camera adjustment mechanism, which relates to the field of ranging devices and includes a camera module and a housing. The housing is provided with a cavity for accommodating the camera module, the camera module is installed in the cavity, and an adjustment elastic sheet is arranged between the camera module and the cavity. The adjustment elastic sheet includes a first elastic sheet and a second elastic sheet, and the first elastic sheet and the second elastic sheet are connected into an L shape. The present invention also discloses a rangefinder. This high-precision camera adjustment mechanism can realize the adjustment of the optical axis center line of the camera module in two directions, namely horizontal and vertical.

Description

Technical Field

[0001] The present invention relates to the field of ranging devices, and particularly to a high-precision camera adjustment mechanism and a rangefinder. Background Art

[0002] Currently, high-precision ranging is widely used in the measurement field. When measuring at different distances, if the optical path emitted by a laser emitter is used as a reference, it is meaningful to measure only when the distance between the optical path emitted by the laser emitter and the horizontal line passing through the optical center of the image is a fixed constant value. That is to say, it becomes possible for the ranging device to capture the scene of the measured point. If the optical paths are not parallel, the optical path emitted by the laser emitter will shift outside the image center or even out of the image range as the measurement distance increases. Therefore, it is very important to ensure that the optical path of the image optical center is as parallel as possible to the optical path emitted by the laser emitter. In addition, if one can both see an object, record the distance coordinates of the object, and capture the scene of the target point, it is undoubtedly a good choice for users. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a high-precision camera adjustment mechanism that can adjust the optical axis center line of the camera module in both the horizontal and vertical directions.

[0004] The present invention is implemented by adopting the following technical solutions:

[0005] A high-precision camera adjustment mechanism includes a camera module and a housing. The housing is provided with a cavity for accommodating the camera module. The camera module is installed in the cavity. An adjustment elastic sheet is arranged between the camera module and the cavity. The adjustment elastic sheet includes a first elastic sheet and a second elastic sheet. The first elastic sheet and the second elastic sheet are connected into an L shape. A first extension piece inclined towards the camera module is arranged behind the first elastic sheet. A second extension piece inclined towards the camera module is arranged behind the second elastic sheet. The first extension piece abuts against the area behind the middle part of the top surface of the camera module. The second extension piece abuts against the area behind the middle part of the side surface of the camera module. A first micrometer screw and a second micrometer screw are respectively arranged on the bottom surface and the side surface of the housing. The first micrometer screw and the second micrometer screw penetrate through the bottom surface and the side surface of the housing. The first micrometer screw abuts against the bottom surface of the camera module. The second micrometer screw abuts against the side surface of the camera module away from the second elastic sheet. A first protrusion and a second protrusion are respectively arranged on the top surface of the cavity and the side surface away from the first micrometer screw. The first protrusion is located at the front side of the top of the camera module. The second protrusion is located at the front side of the side surface of the camera module away from the first micrometer screw.

[0006] Preferably, a third protrusion and a fourth protrusion are respectively provided on the inner bottom surface of the cavity and the side surface close to the first machine screw. The third protrusion is located at the rear side of the bottom of the camera module, and the fourth protrusion is located at the rear side of the side surface of the camera module close to the first machine screw.

[0007] Preferably, the first elastic sheet is arranged in contact with the first protrusion, and the second elastic sheet is arranged in contact with the second protrusion.

[0008] Preferably, the first machine screw is located below the center of the bottom surface of the camera module, and the second machine screw is located outside the center of the side surface of the camera module.

[0009] Preferably, the widths of the first elastic sheet and the second elastic sheet are both smaller than the width of the camera module.

[0010] Preferably, a first arc-shaped member is provided at one end of the first elastic sheet away from the second elastic sheet, a second arc-shaped member is provided at one end of the second elastic sheet away from the first elastic sheet, a third arc-shaped member is provided between the first elastic sheet and the second elastic sheet, and the first elastic sheet and the second elastic sheet are connected by the third arc-shaped member.

[0011] Preferably, a first space, a second space and a third space are provided inside the cavity, and the first space, the second space and the third space are respectively used for accommodating the first arc-shaped member, the second arc-shaped member and the third arc-shaped member.

[0012] Preferably, a first blocking block and a second blocking block for blocking the camera module from falling from the front of the cavity are respectively provided in front of the first elastic sheet and the second elastic sheet.

[0013] Preferably, both the first blocking block and the second blocking block are inclined outward.

[0014] Another object of the present invention is to provide a rangefinder.

[0015] A rangefinder includes a laser emitter, a long-focus camera and the high-precision camera adjusting mechanism as described above. The laser emitter and the long-focus camera are installed on a housing, and the camera module is a wide-angle camera module.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The rangefinder of the present invention relies on mechanical principles to finely adjust the camera module in three-dimensional space. By adjusting the first micrometer screw, the transformation of the upper and lower light rays of the camera module can be achieved. By adjusting the second micrometer screw, the transformation of the left and right light rays of the camera module can be achieved. Thus, the adjustment of the optical axis center line of the camera module in the horizontal and vertical directions is realized, and for ranging points beyond 20 meters, it can also ensure that the optical path emitted by the laser emitter is parallel to the optical axis center line of the camera module. The rangefinder of the present invention is re-inspected in cooperation with standard test equipment, and the distance between the laser emitter and the optical axis center line of the camera module can be adjusted to a fixed constant value, and algorithm compensation is performed through software, thereby realizing the high-precision operation requirements of the ranging point. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the rangefinder in the embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram after the components of the rangefinder in the embodiment of the present invention are disassembled.

[0019] Figure 3 It is an initial state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0020] Figure 4 It is a first state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0021] Figure 5 It is a second state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0022] Figure 6 It is a third state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0023] Figure 7 It is a fourth state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0024] Figure 8 It is a fifth state diagram of the vertical direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0025] Figure 9 It is an initial state diagram of the horizontal direction adjustment of the optical axis center line of the camera module in the embodiment of the present invention.

[0026] Figure 10 It is a partial schematic diagram of the rangefinder in the embodiment of the present invention.

[0027] Figure 11It is a schematic diagram showing that the optical path emitted by the laser emitter is parallel to the central axis of the optical axis of the camera module.

[0028] Figure 12 It is a schematic diagram showing that the optical path emitted by the laser emitter is not parallel to the central axis of the optical axis of the camera module.

[0029] Reference numerals: 1, laser emitter; 2, telephoto camera; 3, camera module; 4, housing; 5, cavity; 6, adjusting shrapnel; 7, first shrapnel; 8, second shrapnel; 9, first arc-shaped member; 10, second arc-shaped member; 11, third arc-shaped member; 12, first space; 13, second space; 14, third space; 15, first extension piece; 16, second extension piece; 17, first blocking block; 18, second blocking block; 19, first machine screw; 20, second machine screw; 21, third protrusion; 22, first protrusion; 23, fourth protrusion; 24, second protrusion. Detailed implementation manners

[0030] The following combines Figures 1-12 to elaborate more detailedly on the technical solutions provided by the invention.

[0031] As Figures 1-12 shown, an embodiment of the present invention provides a rangefinder. The rangefinder includes a laser emitter 1, a telephoto camera 2, and a high-precision camera adjustment mechanism.

[0032] The high-precision camera adjustment mechanism includes a camera module 3 and a housing 4. The camera module 3 is a wide-angle camera module. The housing 4 is provided with a cavity 5 for accommodating the camera module 3, and the camera module 3 is installed in the cavity 5. The laser emitter 1 and the telephoto camera 2 are both installed on the housing 4.

[0033] An adjusting shrapnel 6 is arranged between the camera module 3 and the cavity 5. The adjusting shrapnel 6 includes a first shrapnel 7 and a second shrapnel 8. The first shrapnel 7 and the second shrapnel 8 are connected into an L shape. Specifically, a first arc-shaped member 9 is arranged at one end of the first shrapnel 7 away from the second shrapnel 8, a second arc-shaped member 10 is arranged at one end of the second shrapnel 8 away from the first shrapnel 7, and a third arc-shaped member 11 is arranged between the first shrapnel 7 and the second shrapnel 8. The first shrapnel 7 and the second shrapnel 8 are connected by the third arc-shaped member 11 to form an L-shaped structure. The adjusting shrapnel 6 is installed inside the cavity 5. A first space 12, a second space 13 and a third space 14 are arranged inside the cavity 5. The first space 12, the second space 13 and the third space 14 are respectively used to accommodate the first arc-shaped member 9, the second arc-shaped member 10 and the third arc-shaped member 11. A first extension piece 15 inclined towards the camera module 3 is arranged behind the first shrapnel 7, and a second extension piece 16 inclined towards the camera module 3 is arranged behind the second shrapnel 8. The first extension piece 15 abuts against the area behind the middle of the top surface of the camera module 3, and the second extension piece 16 abuts against the area behind the middle of the side surface of the camera module 3. First blocking blocks 17 and second blocking blocks 18 for preventing the camera module 3 from falling from the front of the cavity 5 are respectively arranged on the first shrapnel 7 and the second shrapnel 8. The first blocking blocks 17 and the second blocking blocks 18 are both inclined outwards.

[0034] A first machine screw 19 and a second machine screw 20 are respectively arranged on the bottom surface and the side surface of the housing 4. The first machine screw 19 and the second machine screw 20 penetrate through the bottom surface and the side surface of the housing 4. The first machine screw 19 abuts against the bottom surface of the camera module 3, and the second machine screw 20 abuts against the side surface of the camera module 3 away from the second shrapnel 8. A first protrusion 22 and a second protrusion 24 are respectively arranged on the top surface and the side surface away from the first machine screw 19 of the cavity 5. After the camera module 3 is installed in the cavity 5, the first protrusion 22 is located at the front side of the top of the camera module 3, and the second protrusion 24 is located at the front side of the side surface of the camera module 3 away from the first machine screw 19. A third protrusion 21 and a fourth protrusion 23 are respectively arranged on the inner bottom surface and the side surface close to the first machine screw 19 of the cavity 5. After the camera module 3 is installed in the cavity 5, the third protrusion 21 is located at the rear side of the bottom of the camera module 3, and the fourth protrusion 23 is located at the rear side of the side surface of the camera module 3 close to the first machine screw 19. The first shrapnel 7 is attached to the first protrusion 22, and the second shrapnel 8 is attached to the second protrusion 24. The first machine screw 19 is located below the center of the bottom surface of the camera module 3, and the second machine screw 20 is located outside the center of the side surface of the camera module 3. The widths of both the first shrapnel 7 and the second shrapnel 8 are smaller than the width of the camera module 3.

[0035] Principle of operation of the rangefinder in this embodiment: In order to make the optical axis center line of the camera module 3 of the rangefinder parallel to the optical path emitted by the laser emitter, the rangefinder in this embodiment adjusts the camera module 3 in three-dimensional space relying on mechanical principles, such as Figure 5 shown, adjust the first machine screw 19 to move upward. The first machine screw 19 pushes the camera module 3, and the camera module 3 receives an upward force. Since one side of the top of the camera module 3 is blocked by the first extension piece 15, as the first machine screw 19 moves upward, the camera module 3 will gradually tilt towards the side not blocked by the first extension piece 15, and the third protrusion 21 will support the camera module 3, as Figure 6 shown, continue to move the first machine screw 19 upward. When the camera module 3 tilts to a certain extent, the camera module 3 touches the first elastic sheet 7, and the first elastic sheet 7 blocks the camera module 3. At this time, both sides of the top of the camera are blocked, as Figure 7 shown, adjust the first machine screw 19 to continue moving upward. Since the first protrusion 22 blocks the front side of the first elastic sheet 7, the camera module 3 will push the first extension piece 15 to deform, and the bottom of the camera module 3 will leave the third protrusion 21, as Figure 8 shown, continue to adjust the first machine screw to move upward. The first elastic sheet 7 will deform, and the camera module 3 will gradually tilt towards the other side, causing the optical axis center line of the camera module 3 to move downward, thus realizing the adjustment of the optical axis center line of the camera module 3 in the vertical direction. Similarly, adjusting the second machine screw 20 can realize the adjustment of the optical axis center line of the camera module 3 in the horizontal direction.

[0036] The length, width, and height of the camera module 3 are 8.5 mm, 8.5 mm, and 6.2 mm respectively, and the length, width, and height of the housing 4 are 50 mm, 44 mm, and 27 mm respectively. The rangefinder in this embodiment can also ensure that the optical path emitted by the laser emitter is parallel to the optical axis center line of the camera module 3 for a ranging point more than 20 meters away. Through the rangefinder in this embodiment, and then cooperating with a standard test device for re-inspection, the distance between the laser emitter and the optical axis center line of the camera module can be adjusted to a fixed constant value, and algorithm compensation is performed through software, thereby realizing the high-precision operation requirements of the ranging point.

[0037] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A high-precision camera adjustment mechanism, characterized in that: It includes a camera module and a housing. The housing is provided with a cavity for accommodating the camera module. The camera module is installed in the cavity. An adjusting elastic piece is arranged between the camera module and the cavity. The adjusting elastic piece includes a first elastic piece and a second elastic piece. The first elastic piece and the second elastic piece are connected into an L shape. A first extension piece inclined towards the camera module is arranged behind the first elastic piece. A second extension piece inclined towards the camera module is arranged behind the second elastic piece. The first extension piece abuts against the area behind the middle of the top surface of the camera module. The second extension piece abuts against the area behind the middle of the side surface of the camera module. A first setscrew and a second setscrew are respectively arranged on the bottom surface and the side surface of the housing. The first setscrew and the second setscrew penetrate through the bottom surface and the side surface of the housing. The first setscrew abuts against the bottom surface of the camera module. The second setscrew abuts against the side surface of the camera module away from the second elastic piece. A first protrusion and a second protrusion are respectively arranged on the top surface of the cavity and the side surface away from the first setscrew. The first protrusion is located at the front side of the top of the camera module. The second protrusion is located at the front side of the side surface of the camera module away from the first setscrew; A third protrusion and a fourth protrusion are respectively arranged on the bottom surface inside the cavity and the side surface close to the first setscrew. The third protrusion is located at the rear side of the bottom of the camera module. The fourth protrusion is located at the rear side of the side surface of the camera module close to the first setscrew; The first elastic piece is arranged in contact with the first protrusion. The second elastic piece is arranged in contact with the second protrusion.

2. The high-precision camera adjustment mechanism according to claim 1, characterized in that: The first setscrew is located below the center of the bottom surface of the camera module. The second setscrew is located outside the center of the side surface of the camera module.

3. The high-precision camera adjustment mechanism according to claim 1, wherein: The width of the first elastic piece and the width of the second elastic piece are both smaller than the width of the camera module.

4. The high-precision camera adjustment mechanism according to claim 1, wherein: A first arc-shaped piece is arranged at one end of the first elastic piece away from the second elastic piece. A second arc-shaped piece is arranged at one end of the second elastic piece away from the first elastic piece. A third arc-shaped piece is arranged between the first elastic piece and the second elastic piece. The first elastic piece and the second elastic piece are connected through the third arc-shaped piece.

5. The high-precision camera adjustment mechanism according to claim 1, wherein: A first space, a second space and a third space are arranged inside the cavity. The first space, the second space and the third space are respectively used for accommodating the first arc-shaped piece, the second arc-shaped piece and the third arc-shaped piece.

6. The high-precision camera adjustment mechanism according to claim 1, characterized in that: First blocking blocks and second blocking blocks for preventing the camera module from falling from the front of the cavity are respectively arranged in front of the first elastic piece and the second elastic piece.

7. The high-precision camera adjustment mechanism according to claim 6, wherein: Both the first blocking block and the second blocking block are inclined outwards.

8. A rangefinder, characterized in that: It includes a laser emitter, a long-focus camera and a high-precision camera adjusting mechanism as described in any one of claims 1-7. The laser emitter and the long-focus camera are installed on the housing. The camera module is a wide-angle camera module.

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