CN113534100A - Scanning mirror assembly and laser radar - Google Patents
Scanning mirror assembly and laser radar Download PDFInfo
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- CN113534100A CN113534100A CN202110813422.0A CN202110813422A CN113534100A CN 113534100 A CN113534100 A CN 113534100A CN 202110813422 A CN202110813422 A CN 202110813422A CN 113534100 A CN113534100 A CN 113534100A
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- 238000003825 pressing Methods 0.000 claims abstract description 114
- 239000002390 adhesive tape Substances 0.000 claims description 26
- 238000002955 isolation Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 20
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
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- Radar, Positioning & Navigation (AREA)
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- Mechanical Optical Scanning Systems (AREA)
Abstract
The application discloses scanning mirror assembly and laser radar, this scanning mirror assembly includes: the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror; the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block; the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror; the press block is pressed against the first single-face mirror or the second single-face mirror, and the press block can be operated to compress or release the telescopic piece. Through the mode, the included angle between the two reflecting surfaces of the scanning mirror can be adjusted.
Description
Technical Field
The application relates to the technical field of radars, in particular to a scanning mirror assembly and a laser radar.
Background
The laser radar can obtain the distance from the laser radar to the object according to the laser ranging principle at the moment.
The existing laser radar mostly uses a double-sided mirror as a reflector, and the included angle between two reflecting surfaces of the reflector is determined during production and processing, so that the included angle between the two reflecting surfaces can not be adjusted according to requirements. In addition, the cost of a double mirror is generally higher than two single-sided mirrors.
Disclosure of Invention
The technical problem that this application mainly solved provides a scanning mirror subassembly and laser radar, can adjust the contained angle between two plane of reflection of scanning mirror.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a scanning mirror assembly comprising: the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror; the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block; the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror; the press block is abutted against the first single-face mirror or the second single-face mirror, and the press block can be operated to compress or release the telescopic piece.
The scanning mirror comprises a first mounting end and a second mounting end, and the first mounting end and the second mounting end are respectively arranged on two corresponding opposite sides of the first single-face mirror and the second single-face mirror; the pressing block abuts against the first mounting end or the second mounting end and can be selectively operated to compress or release the telescopic piece.
The pressing block comprises a first pressing block and a second pressing block, the first pressing block abuts against the first mounting end, and the second pressing block abuts against the second mounting end; both the first and second compacts are selectively operable to compress or release the bellows.
The scanning mirror assembly also comprises a frame, a support is convexly arranged on the inner wall of the frame, the scanning mirror is installed in the frame, and the reflecting surface of the first single-face mirror is abutted to the support; one end of the pressing block is movably arranged on the frame, and the other end of the pressing block, which is opposite to the other end, can be operated to abut against the first installation end or the second installation end of the reflecting surface of the second single-face mirror.
The number of the telescopic pieces is the same as that of the pressing blocks, and the orthographic projection of each telescopic piece and the corresponding central axis of each pressing block coincide.
The two pressing blocks of each group are arranged at intervals and can be respectively operated to abut against two ends of a first mounting end and a second mounting end of the reflecting surface of the second single-face mirror; the extensible member is four corresponding with the briquetting, and each briquetting aligns the setting with the extensible member that corresponds.
The adjusting assembly further comprises a fastener, one end of each pressing block is provided with a fixing hole, the fastener penetrates through the fixing hole and is fixedly connected with the frame, and the fastener can be screwed or released relative to the fixing hole to fasten or release the pressing block to the frame.
The scanning mirror assembly further comprises an isolation plate, the isolation plate is movably mounted on the frame and abuts against the reflecting surface of the second single-face mirror, and the isolation plate can be adjusted to abut against the reflecting surface of the second single-face mirror so as to compress or release the telescopic piece.
The frame is convexly provided with two opposite fixed seats, two opposite ends of the isolation plate are respectively convexly provided with two fixed lugs, and the fixed lugs are respectively detachably arranged on the fixed seats; and the partition board spans the second single-face mirror and the first single-face mirror to divide the second single-face mirror and the first single-face mirror into two parts.
Wherein, the extensible member comprises an adhesive tape.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a lidar comprising a scanning mirror assembly as described above.
The beneficial effect of this application is: in contrast to the state of the art, the present application provides a scanning mirror assembly comprising: the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror; the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block; the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror; the press block is abutted against the first single-face mirror or the second single-face mirror, and the press block can be operated to compress or release the telescopic piece. By operating the pressing block which is eccentrically arranged, the telescopic piece arranged between the first single-face mirror and the second single-face mirror can be compressed or released, so that the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted, and the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted according to different requirements or application scenes.
In addition, the scanning mirror is formed by overlapping two single-face mirrors, the single-face mirrors are lower in production cost and simpler in production and processing technology compared with double-face mirrors, and the production and manufacturing cost can be reduced.
Drawings
FIG. 1 is a schematic diagram of a scanning mirror assembly according to one embodiment of the present application;
FIG. 2 is a simplified structural schematic diagram of an embodiment of a scan mirror provided herein;
FIG. 3 is a schematic diagram of an exploded view of one embodiment of a scanning mirror assembly provided herein;
FIG. 4 is a schematic view of a portion of one embodiment of a scanning mirror assembly provided herein;
fig. 5 is a schematic bottom view of an embodiment of a scanning mirror assembly provided herein.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
It should be noted that if descriptions related to "first", "second", etc. exist in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
For a better understanding of the present application, a scanning mirror assembly and lidar as provided herein will be described in greater detail with reference to the accompanying drawings and specific embodiments.
In general, the present application provides a scanning mirror assembly comprising: the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror; the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block; the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror; the press block is pressed against the first single-face mirror or the second single-face mirror, and the press block can be operated to compress or release the telescopic piece. By operating the pressing block which is eccentrically arranged, the telescopic piece arranged between the first single-face mirror and the second single-face mirror can be compressed or released, so that the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted, and the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted according to different requirements or application scenes.
In addition, the scanning mirror is formed by overlapping two single-face mirrors, the single-face mirrors are lower in production cost and simpler in production and processing technology compared with double-face mirrors, and the production and manufacturing cost can be reduced.
Referring to fig. 1-2 in combination, fig. 1 is a schematic structural diagram of an embodiment of a scanning mirror assembly provided in the present application, and fig. 2 is a simplified structural diagram of an embodiment of a scanning mirror provided in the present application. The scanning mirror assembly 100 includes a scanning mirror 10 and an adjustment assembly 30. The scanning mirror 10 includes a first single-face mirror 11 and a second single-face mirror 12, the first single-face mirror 11 and the second single-face mirror 12 both include a reflective surface 13 and a back surface (not shown in the figure) that are oppositely disposed, the back surface of the first single-face mirror 11 is disposed facing the back surface of the second single-face mirror 12 so that the first single-face mirror 11 and the second single-face mirror 12 are stacked into a whole, that is, the two single-face mirrors are disposed back to form the scanning mirror 10 with the dual reflective surfaces 13, compared with the scanning mirror 10 with the dual reflective surfaces 13 formed in the production process, the production process of the scanning mirror 10 with the dual reflective surfaces formed by the two single-face mirrors is simpler, and the cost is lower.
The adjustment assembly 30 comprises a telescopic member 31 and an eccentrically arranged pressure piece 32. The telescopic member 31 is disposed between the first single-sided mirror 11 and the second single-sided mirror 12, and respectively abuts against the back surfaces of the first single-sided mirror 11 and the second single-sided mirror 12; the pressing block 32 presses against the first single-face mirror 11 or the second single-face mirror 12, and the pressing block 32 can be operated to compress or release the telescopic member 31. Because the existing reflector mostly adopts a double-sided mirror, the included angle between the two reflecting surfaces 13 of the reflector is already determined during production and processing, and the included angle between the two reflecting surfaces 13 cannot be adjusted. Therefore, by arranging two single-face mirrors, and eccentrically arranging the pressing block 32 on any single-face mirror, that is, the pressing block 32 is arranged away from the center of the scanning mirror 10, and by operating the pressing block 32, the telescopic member 31 arranged between the first single-face mirror 11 and the second single-face mirror 12 can be compressed or released, so as to adjust the included angle between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12, so that the included angle between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 can be adjusted according to different requirements or application scenes. In addition, the included angle between the two reflecting surfaces 13 of the scanning mirror 10 is adjusted by the adjusting assembly 30, so that the manufacturing cost can be greatly reduced, and the manufacturing process is simple.
For example, as shown in fig. 2, in an application scenario, an included angle α between the reflective surfaces 13 of the first single-mirror 11 and the second single-mirror 12 needs to be equal to 0.0025 °. However, the angle α between the reflective surfaces 13 of the first single-mirror 11 and the second single-mirror 12 is detected to be 0.125 °. Because the included angle α between the two reflecting surfaces 13 is too large, the pressure of the pressure block 32 on the second single-face mirror 12 is increased by pressing the pressure block 32, so that the pressure of the second single-face mirror 12 on the telescopic member 31 is increased, and the telescopic member 31 is compressed until the included angle α between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 is equal to 0.0025 °, so that the angle adjustment between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 is completed; when the included angle α between the two reflecting surfaces 13 is adjusted excessively, that is, is less than 0.0025 °, the pressure of the press block 32 on the second single-sided mirror 12 can be reduced, so that the pressure of the second single-sided mirror 12 on the telescopic member 31 is reduced, and the included angle α between the telescopic member 31 and the reflecting surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12 is released to be equal to 0.0025 °, so that the angle adjustment between the reflecting surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12 is completed.
Optionally, in an embodiment, the expansion member 31 is an adhesive tape, for example, the expansion member 31 is a high temperature adhesive tape, and may be a teflon high temperature adhesive tape, a high temperature textured paper adhesive tape, or a PET green high temperature adhesive tape, which is not limited herein. When the telescopic member 31 is a high-temperature adhesive tape, the telescopic member not only plays a role of adjusting an included angle between the reflecting surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12, but also plays a role of bonding the first single-sided mirror 11 and the second single-sided mirror 12 to fix the two to each other. Specifically, on the one hand, a certain thickness of high temperature adhesive tape has compression resilience, so that the high temperature adhesive tape can be compressed or released by operating the pressing block 32 to adjust the angle between the reflective surfaces 13 of the first and second single mirrors 11 and 12. On the other hand, the high-temperature adhesive tape is actually an adhesive tape, which can bond the first single-sided mirror 11 and the second single-sided mirror 12 to fix them to each other, and the high-temperature adhesive tape is high-temperature resistant, and when the scanning mirror 10 is in a high-temperature environment, the high-temperature adhesive tape will not be melted or deformed due to high temperature, so as to avoid the change of the included angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12, or the bonding failure between the first single-sided mirror 11 and the second single-sided mirror 12 to cause the mutual movement, which affects the normal operation of the scanning mirror 10. The thickness of the high-temperature adhesive tape can be specifically set according to actual use needs, and is not specifically limited herein, for example, the thickness of the high-temperature adhesive tape is 0.05mm-0.15 mm; the thickness of the high-temperature adhesive tape may be a thickness formed by overlapping multiple layers of high-temperature adhesive tapes, or may be a thickness of a single layer of high-temperature adhesive tape, for example, when the thickness of the high-temperature adhesive tape is required to be larger and the thickness of the single layer of high-temperature adhesive tape is not enough to meet the requirement, the required thickness of the high-temperature adhesive tape can be achieved by overlapping multiple layers of high-temperature adhesive tapes. It should be understood that, in other embodiments, the telescopic element 31 may also be another type of adhesive tape, or the telescopic element 31 may also be an elastic element made of another material, and the like, which may be specifically arranged according to actual use requirements, and is not limited herein.
Referring to fig. 3-4, fig. 3 is an exploded view of an embodiment of a scanning mirror assembly provided herein, and fig. 4 is a partial view of the scanning mirror assembly provided herein. In one embodiment, the scan mirror 10 includes a first mounting end 14 and a second mounting end 15, and the first mounting end 14 and the second mounting end 15 are disposed on opposite sides of the scan mirror 10, respectively. Because the first single-face mirror 11 and the second single-face mirror 12 are stacked back to form the scanning mirror 10, that is, the first mounting end 14 and the second mounting end 15 of the scanning mirror 10 are also the first mounting end 14 and the second mounting end 15 corresponding to the first single-face mirror 11 and the second single-face mirror 12, and the first mounting end 14 and the second mounting end 15 are also respectively disposed at two corresponding opposite sides of the first single-face mirror 11 and the second single-face mirror 12.
The press block 32 abuts against the first mounting end 14 or the second mounting end 15, and the setting positions of the first mounting end 14 and the second mounting end 15 are respectively arranged at the edges of the first single-face mirror 11 and the second single-face mirror 12, so that when the press block 32 is operated and adjusted to compress or release the telescopic piece 31, the included angle between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 can be adjusted to a preset angle by a small pressure adjustment amount; in addition, the pressing block 32 is abutted against the first mounting end 14 or the second mounting end 15, which is more convenient for the user to operate the pressing block 32 than the pressing block is abutted against the first single-face mirror 11 or the second single-face mirror 12 at other positions. It should be understood that, in other embodiments, the pressing block 32 may be disposed in contact with other positions of the first single-sided mirror 11 or the second single-sided mirror 12, and may be specifically disposed according to actual use requirements, which is not specifically limited herein.
Referring to fig. 3-4, in an embodiment, the pressing block 32 includes a first pressing block 321 and a second pressing block 322, the first pressing block 321 abuts against the first mounting end 14, the second pressing block 322 abuts against the second mounting end 15, that is, the pressing blocks 32 capable of operating to compress or release the telescopic member 31 are disposed on two opposite sides of the scanning mirror 10, the first pressing block 321 and the second pressing block 322 are matched with each other to adjust an included angle between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12, and the first pressing block 321 and the second pressing block 322 are matched with each other to adjust the included angle between the first pressing block 321 and the second pressing block 322 and the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 to be a predetermined angle with a small pressure adjustment amount.
Referring to fig. 4-5, fig. 5 is a schematic bottom view of an embodiment of a scanning mirror assembly according to the present application. In one embodiment, the scanning mirror assembly 100 further includes a frame 33, and the scanning mirror 10 is mounted in the frame 33, such that the frame 33 can protect the scanning mirror 10 and prevent the scanning mirror 10 from wearing or colliding with other components during operation.
Wherein, the inner wall of the frame 33 is provided with a support 331. The support 331 abuts on the reflection surface 13 of the first single-sided mirror 11, and can function to support the first single-sided mirror 11. The press block 32 abuts against the reflective surface 13 of the second single-face mirror 12, and when the press block 32 is operated to adjust the included angle between the reflective surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12, the support 331 is arranged to support the first single-face mirror 11, so that the first single-face mirror 11 does not move relative to the second single-face mirror 12, and the adjustment of the included angle between the two reflective surfaces 13 is ensured to be normally performed.
Specifically, one end of the press block 32 is movably mounted on the frame 33, and the opposite end of the press block 32 abuts against at least one of the first mounting end 14 and the second mounting end 15 of the reflective surface 13 of the second single-sided mirror 12, so that the press block 32 can be adjusted relative to the frame 33 to adjust the included angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12, that is, when the first single-sided mirror 11, the second single-sided mirror 12, the extensible member 31, the frame 33 and the press block 32 are assembled, since the frame 33 supports the press block 32, the press block 32 only contacts with the mounting end of the reflective surface 13 of the second single-sided mirror 12, and does not apply pressure to the mounting end of the reflective surface 13 of the second single-sided mirror 12, and the press block 32 is operated to press the mounting end only after it is determined that the included angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12 needs to be adjusted, the change of the included angle between the two reflecting surfaces 13 caused by the pressure applied by the pressing block 32 when the included angle between the two reflecting surfaces 13 is in accordance with the requirement at first, that is, the angle adjustment is not needed at first is avoided. It is understood that, in other embodiments, the second single-sided mirror 12 may abut against the supporting member 331 and the pressing member 32 may abut against the mounting end of the reflecting surface 13 of the first single-sided mirror 11, and may be specifically disposed according to actual use requirements, and is not specifically limited herein. Optionally, in an embodiment, the frame 33 and the pressing block 32 are made of aluminum alloy, which is light metal and has high strength, so that the frame 33 and the pressing block 32 can be made strong and not easily damaged, and the scanner mirror assembly 100 cannot be too heavy due to the arrangement of the frame 33 and the pressing block 32.
Since one end of the press piece 32 is movably attached to the frame 33, in order to allow the opposite end of the press piece 32 to abut against the attachment end of the reflecting surface 13 of the second single-sided mirror 12, when the first single-sided mirror 11, the second single-sided mirror 12, the extensible member 31, the frame 33, and the press piece 32 are assembled, the reflecting surface 13 of the second single-sided mirror 12 is located at a level higher than a level at which the end surface of the frame 33 movably connected to the press piece 32 is located. In other words, the distance between the bottom surface of the reflecting surface 13 of the second single-sided mirror 12 and the support 331 for abutting against the pressure piece 32 is smaller than the distance between the reflecting surface 13 of the second single-sided mirror 12 and the support 331 when the telescopic member 31 is at the height in the natural state. The height of the telescopic member 31 in the natural state is a height which the scanning mirror 10 has when the two single mirrors and the telescopic member 31 are stacked, and no other external force acts thereon. In this way, the pressure of the pressure piece 32 against the second single-sided mirror 12 can be adjusted as needed, and the pressure of the one end of the pressure piece 32 that is in contact with the attachment end of the second single-sided mirror 12 against the attachment end of the second single-sided mirror 12 can be adjusted. Since one end of the pressing block 32 is movably mounted on the frame 33, when the reflecting surface 13 of the second single-sided mirror 12 is lower than the end surface of the frame 33 movably connected to the pressing block 32, the pressing block 32 cannot abut against the reflecting surface 13 of the second single-sided mirror 12, and thus the pressure cannot be applied to the reflecting surface 13 of the second single-sided mirror 12 to adjust the included angle between the two reflecting surfaces 13. It can be understood that, since the thicknesses of the first single-sided mirror 11 and the second single-sided mirror 12 are determined during production and manufacturing, when the telescopic member 31 is a high-temperature adhesive tape, the thickness of the high-temperature adhesive tape may be adjusted to make the reflective surface 13 of the second single-sided mirror 12 higher than the end surface of the frame 33 movably connected with the pressing block 32, and how much the reflective surface 13 of the second single-sided mirror 12 is higher than the end surface of the frame 33 movably connected with the pressing block 32 is not particularly limited, and may be specifically set according to actual use requirements.
In order to adjust the pressure of the pressing block 32 on the mounting end of the scanning mirror 10, in an embodiment, the adjusting assembly 30 further includes a fastening member 34, one end of each pressing block 32 is provided with a fixing hole (not shown), the fastening member 34 passes through the fixing hole of the pressing block 32 and is fixedly connected with the frame 33, and by adjusting the fastening member 34, the fastening member 34 can be screwed with respect to the fixing hole of the pressing block 32, so that the pressure of the pressing block 32 on the mounting end of the scanning mirror 10 can be adjusted, and the degree of compression of the single-mirror on the telescopic member 31 can be controlled. When the adjustment of the fastener 34 is stopped, the fastener 34 can fasten the pressing block 32 to the frame 33, so that the compression degree of the single-face mirror on the telescopic piece 31 is kept unchanged, and the pressure of the pressing block 32 on the mounting end of the scanning mirror 10 is prevented from changing due to loose connection between the pressing block 32 and the frame 33. Alternatively, the degree of compression of telescoping member 31 by weight 32 may be adjusted by adjusting fastener 34 so that fastener 34 is releasable relative to the fixed aperture of weight 32, thereby releasing weight 32 from frame 33 to release the compression of telescoping member 31.
In a specific embodiment, the frame 33 is provided with a first mounting positioning hole 333, the pressing block 32 is correspondingly provided with a mounting hole (not shown), and the fastener 34 is a screw passing through the mounting hole and screwed into the first mounting positioning hole 333 to mount the pressing block 32 on the frame 33. Because the three are in threaded connection, the tightness of the connection between the press block 32 and the frame can be adjusted by screwing screws, so that the pressure of the press block 32 on the single-face mirror which is arranged in a manner of being pressed against the press block 32 is adjusted, and further, the included angle between the reflecting surfaces 13 of the first single-face mirror 11 and the second single-face mirror 12 is adjusted.
In order to achieve a better compression or release of the telescopic member 31 with a smaller amount of pressure adjustment when operating the pressure pieces 32, in one embodiment, the number of telescopic members 31 and pressure pieces 32 is the same. That is, each expansion member 31 is provided with a pressing block 32, and an orthographic projection of each expansion member 31 and the central axis of the corresponding pressing block 32 is overlapped. The orthographic projection of the central axis of the telescopic member 31 and the corresponding pressing block 32 coincide, which means that the connecting line perpendicularly connecting the first mounting end 14 and the second mounting end 15 intersects with the central axes of the telescopic member 31 and the pressing block 32, that is, the telescopic member 31 and the pressing block 32 are both arranged in the length direction of the connecting line, so that the telescopic member 31 can be better compressed or released by operating the pressing block 32. For example, taking the operation pressing block 32 to compress the telescopic member 31 as an example, by increasing the pressing force of the pressing block 32 on the first single-face mirror 11 or the second single-face mirror 12, the pressure generated by the operation pressing block 32 is transmitted to the telescopic member 31 through the single-face mirror pressed by the pressing block 32, so as to compress the telescopic member 31, since orthographic projections of the central axes of the telescopic member 31 and the pressing block 32 are overlapped, the acting force received by the telescopic member 31 is larger, the loss of the force generated by the operation pressing block 32 in the transmission process is reduced, and the effect of compressing the telescopic member 31 is better achieved. It is understood that in other embodiments, the telescopic member 31 and the pressing block 32 may be disposed in other positional relationships to achieve a better effect of compressing or releasing the telescopic member 31, and may be specifically disposed according to the use requirement, and are not limited herein.
In other embodiments, each expansion piece 31 may be disposed directly below the portion of the pressing block 32 protruding from the mounting surface 332, in addition to the orthographic projection of each expansion piece 31 and the central axis of the corresponding pressing block 32 being coincident. Because each expansion piece 31 is correspondingly arranged under the part of the press block 32 protruding out of the mounting surface 332, when the expansion piece 31 is compressed by operating the press block 32 or when the expansion piece 31 is released by operating the press block 32, the press block 32 directly faces the expansion piece 31 through the acting force of the single-surface mirror on the expansion piece 31, and the acting force generated by the protruding part of the press block 32 on the expansion piece 31 is the same, so that the acting force on each part of the expansion piece 31 positioned under the press block 32 is the same, the expansion piece 31 is integrally in a compressed state, and the reflecting surfaces 13 of the first single-surface mirror 11 and the second single-surface mirror 12 can form a preset angle by a small pressure adjustment amount.
Referring to fig. 4, in a specific embodiment, the adjusting assembly 30 includes four pressing blocks 32, each two pressing blocks 32 are respectively installed on two opposite sides of the frame 33, and the two pressing blocks 32 of each group are spaced apart and can be respectively operated to press against two ends of the first installation end 14 and the second installation end 15 of the reflection surface 13 of the second single-sided mirror 12. That is, two pressing pieces 32 are mounted at intervals on two opposite end edges of the first mounting end 14 in the longitudinal direction, and the other two pressing pieces 32 are mounted at intervals on two opposite end edges of the second mounting end 15 in the longitudinal direction. Each pressing block 32 is correspondingly provided with a telescopic piece 31, the telescopic pieces 31 are arranged in alignment with the corresponding pressing blocks 32, and the telescopic pieces 31 are more conveniently compressed or released by operating the pressing blocks 32 in the alignment. That is, the four ends of the scanning mirror 10 are respectively provided with the pressing blocks 32 and the telescopic members 31, and the pressing blocks 32 at different positions can be operated or a plurality of pressing blocks 32 can be operated to be matched with each other according to actual adjustment requirements so as to adjust the included angle between the two reflecting surfaces 13 more quickly and accurately. It is understood that in other embodiments, the pressing block 32 may be disposed at other positions on the first mounting end 14 or the second mounting end 15, and is not limited thereto. In addition, the number of the pressing pieces 32 on the first mounting end 14 and the second mounting end 15 is not particularly limited, and can be specifically set according to actual use requirements.
Referring to fig. 3-5, in an embodiment, the scanning mirror assembly 100 further includes a partition plate 40, the partition plate 40 is movably mounted on the frame 33 and abuts against the reflective surface 13 of the second single-sided mirror 12, and the partition plate 40 can be adjusted to abut against the reflective surface 13 of the second single-sided mirror 12, so that the partition plate 40 can be operated to compress or release the telescopic member 31, thereby adjusting an included angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12.
In a specific embodiment, two opposite fixing seats 3351 are protruded from the frame 33, two fixing lugs 41 are protruded from two opposite ends of the partition plate 40, and the fixing lugs 41 are detachably mounted on the fixing seats 3351. Specifically, the isolation plate 40 includes a first plate 42 and a second plate 43, and the first plate 42 and the second plate 43 are symmetrically disposed with respect to the frame 33 and are connected and fixed by the frame 33; the side surface of the second plate 43 facing the first plate 42 abuts against the reflecting surface 13 of the second single-sided mirror 12; fixing lugs 41 are convexly provided at opposite ends of the first plate body 42 and the second plate body 43 facing the side of the scanning mirror 10. The frame 33 includes opposite first and second side surfaces 335 and (not shown) facing away from the scan mirror 10, and the first and second side surfaces 335 and 335 are respectively provided with a fixing seat 3351. The fixing seat 3351 is provided with a second mounting positioning hole 33511, the fixing lug 41 of the first board 42 and the fixing lug 41 of the second board 43 are respectively provided with a first through hole 421 and a second through hole (not shown), and the first through hole 421, the second through hole and the second mounting positioning hole 33511 are mutually matched to mount the first board 42 and the second board 43 on the frame 33.
Since the first side 335 of the first plate 42 abuts against the reflective surface 13 of the second single-sided mirror 12 and can be operated to compress or release the telescopic member 31, a plurality of longitudinally aligned and spaced first through holes 421 can be provided on the first plate 42, and the first plate 42 and the second plate 43 can be mounted on the frame 33 by determining the degree of compression or release of the telescopic member 31 to determine which of the first through holes 421 is used to cooperate with the second mounting positioning hole 33511 and the second through hole.
In the above embodiment, the partition plate 40 can also divide the scanning mirror 10 into two parts in addition to adjusting the angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12. Specifically, in one embodiment, the isolation plate 40 spans the first single-face mirror 11 and the second single-face mirror 12 to separate the first single-face mirror 11 and the second single-face mirror 12 into two parts, one part is only used for reflecting the scanning emission mirror that emits the laser light, and the other part is only used for reflecting the receiving laser light, i.e., the scanning receiving mirror that is the scattered echo light of the object to be measured, so that the emitted laser light and the receiving laser light are isolated, the influence of stray light generated by the emitted laser light on the receiving laser light to the measurement result is avoided, and the accuracy of the measurement result is improved.
With continued reference to fig. 1 and 3, in one embodiment, the scan mirror assembly 100 further includes a fixed mount 50, and the opposite ends of the frame 33 are pivotally mounted to the fixed mount 50. The fixed bracket 50 functions to support the frame 33, and the frame 33 can rotate relative to the fixed bracket 50, so as to drive the scanning mirror 10 to rotate relative to the fixed bracket 50 along with the frame 33.
More specifically, the opposite ends of the frame 33 are further provided with journals 334, the opposite ends of the fixing bracket 50 are concavely formed with semicircular mounting openings 51, the journals 334 of the frame 33 are respectively rotatably mounted in the mounting openings 51, so that the mounting openings 51 of the fixing bracket 50 can function as supporting the frame 33, and the frame 33 can rotate relative to the mounting openings 51 of the fixing bracket 50.
With continued reference to fig. 1 and 3, in one embodiment, the scanning mirror assembly 100 further includes a bearing 60, and the bearing 60 is disposed on the journal 334 of the frame 33. The bearing 60 includes an outer ring and an inner ring, and rolling elements are provided between the outer ring and the inner ring of the bearing 60. The inner circumference of the inner ring of the bearing 60 abuts against the journal 334, the outer circumference of the outer ring of the bearing 60 abuts against the inner circumference of the mounting opening 51, and the journal 334 can rotate with the inner ring of the bearing 60 relative to the outer ring of the bearing 60 and the fixed bracket 50, so as to drive the frame 33, the first single-sided mirror 11 and the second single-sided mirror 12 to rotate together relative to the fixed bracket 50. Further, due to the provision of the bearing 60, it is possible to reduce the occurrence of abrasion between the frame 33 and the mounting opening 51 of the fixed bracket 50 when rotating relative to the fixed bracket 50. Further, the frame 33 includes two spaced steps with the journal 334 disposed therebetween. When the bearing 60 is fitted over the journal 334, the step limits the axial movement of the bearing 60 along the journal 334, thereby preventing the bearing 60 from falling off the journal 334.
In order to avoid relative movement, such as slippage, between the inner race of the bearing 60 and the journal 334, thereby affecting rotation of the frame 33 relative to the fixed bracket 50, in one embodiment, the scanning mirror assembly 100 further includes a bearing follower 70. Specifically, the bearing pressing ring 70 is sleeved outside the inner ring of the bearing 60 to press the inner ring of the bearing 60 and the journal 334 tightly, so as to prevent the inner ring of the bearing 60 and the journal 334 from moving relative to each other when rotating together, and ensure the normal rotation of the frame 33.
Further, in one embodiment, the scanning mirror assembly 100 also includes a bearing yoke 80. Specifically, the bearing hoop 80 is mounted on the fixing bracket 50 and forms a mounting hole with the semicircular mounting opening 51 on the fixing bracket 50 to tightly hoop the outer ring of the bearing 60 on the fixing bracket 50, so as to prevent the outer ring of the bearing 60 and the fixing bracket 50 from moving relatively to each other when the frame 33 rotates relative to the fixing bracket 50 and affecting the normal rotation of the frame 33. More specifically, the bearing band 80 is also a semi-circular ring, so that when the bearing band 80 is fixed on the fixing bracket 50, it is aligned with the mounting opening 51 to form a circular mounting hole, so as to fix the outer ring of the bearing 60.
With continued reference to fig. 1 and 3, in one embodiment, the scan mirror assembly 100 further includes a motor 90. The motor 90 is mounted on the fixed bracket 50 or the frame 33, and an output shaft of the motor 90 is fixedly connected to the frame 33, thereby driving the frame 33 to rotate. In order to save the volume or space, in a specific embodiment, the shaft neck 334 of the frame 33 further includes a mounting groove (not labeled in the figure), the motor 90 is mounted and fixed in the mounting groove, and the shaft neck 334 connected to the motor 90 can rotate under the driving of the motor 90, so as to drive the frame 33 to rotate, and further drive the scanning mirror 10 mounted in the frame 33 to rotate, thereby implementing the scanning of the laser beam by the scanning mirror 10.
In distinction from the prior art, the present application provides a scanning mirror assembly comprising: the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror; the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block; the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror; the press block is pressed against the first single-face mirror or the second single-face mirror, and the press block can be operated to compress or release the telescopic piece. By operating the pressing block which is eccentrically arranged, the telescopic piece arranged between the first single-face mirror and the second single-face mirror can be compressed or released, so that the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted, and the included angle between the reflecting surfaces of the first single-face mirror and the second single-face mirror can be adjusted according to different requirements or application scenes.
In addition, the scanning mirror is formed by overlapping two single-face mirrors, the single-face mirrors are lower in production cost and simpler in production and processing technology compared with double-face mirrors, and the production and manufacturing cost can be reduced.
In another aspect of the present application, the present application further provides a lidar. The lidar includes a scanning mirror assembly 100 of any of the embodiments described above. Since the scanning mirror assembly 100 has the above-mentioned function of adjusting the included angle between the reflective surfaces 13 of the first single-sided mirror 11 and the second single-sided mirror 12, the laser radar provided by the present application also has the corresponding above-mentioned effects.
Among them, the laser radar is a measuring device that measures a target distance by irradiating a target with a pulse laser and measuring a return time of a reflected pulse with a sensor, and the laser radar is applied to land, air, and mobile terminals. For example, the laser radar may be used for producing a high-resolution map, measuring a height by a laser, and the like, and is not particularly limited herein.
In one embodiment, the laser radar is a rotary scanning laser radar, the rotary scanning laser radar can realize area array field detection by using a single-point emission laser light source, and the distance measurement function is realized by calculating the time difference between the emission laser and the receiving of the scattered echo signal, so that the operation is flexible and simple. The rotary scanning type laser radar may be a conventional mechanical rotary scanning radar, an all-solid-state scanning radar, or a hybrid solid-state scanning radar of a micro-electromechanical system, and the like, which is not limited herein.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (11)
1. A scanning mirror assembly, comprising:
the scanning mirror comprises a first single-face mirror and a second single-face mirror, the first single-face mirror and the second single-face mirror respectively comprise a reflecting surface and a back surface which are arranged oppositely, the first single-face mirror and the second single-face mirror are stacked into a whole, and the back surface of the first single-face mirror faces the back surface of the second single-face mirror;
the adjusting assembly comprises a telescopic piece and an eccentrically arranged pressing block;
the telescopic piece is arranged between the first single-face mirror and the second single-face mirror and respectively abuts against the back faces of the first single-face mirror and the second single-face mirror;
the pressing block is abutted against the first single-face mirror or the second single-face mirror, and the pressing block can be operated to compress or release the telescopic piece.
2. The scan mirror assembly of claim 1,
the scanning mirror comprises a first mounting end and a second mounting end, and the first mounting end and the second mounting end are respectively arranged at two corresponding opposite sides of the first single-face mirror and the second single-face mirror;
the pressing block abuts against the first mounting end or the second mounting end and can be selectively operated to compress or release the telescopic piece.
3. The scan mirror assembly of claim 2,
the pressing block comprises a first pressing block and a second pressing block, the first pressing block is abutted against the first mounting end, and the second pressing block is abutted against the second mounting end;
the first and second compacts are both selectively operable to compress or release the telescopic member.
4. A scanning mirror assembly according to claim 2 or 3,
the scanning mirror assembly further comprises a frame, a support is convexly arranged on the inner wall of the frame, the scanning mirror is installed in the frame, and the reflecting surface of the first single-face mirror is abutted to the support;
one end of the pressing block is movably mounted on the frame, and the other end of the pressing block, which is opposite to the frame, can be operated to abut against the first mounting end or the second mounting end of the reflecting surface of the second single-sided mirror.
5. The scan mirror assembly of claim 4,
the number of the telescopic pieces is the same as that of the pressing blocks, and each telescopic piece is superposed with the orthographic projection of the corresponding central axis of the corresponding pressing block.
6. The scan mirror assembly of claim 4,
the number of the pressing blocks is 4, the two pressing blocks are arranged on two opposite sides of the frame in a group, the two pressing blocks in each group are arranged at intervals and can be respectively operated to abut against two ends of the first installation end and the second installation end of the reflecting surface of the second single-sided mirror;
the telescopic pieces are four corresponding to the pressing blocks, and each pressing block is aligned with the corresponding telescopic piece.
7. The scan mirror assembly of claim 4,
the adjusting assembly further comprises a fastener, one end of each pressing block is provided with a fixing hole, the fastener penetrates through the fixing hole and is fixedly connected with the frame, and the fastener can be screwed or released relative to the fixing hole to fasten or release the pressing block to the frame from the frame.
8. The scan mirror assembly of claim 4,
the scanning mirror assembly further comprises an isolation plate, the isolation plate is movably mounted on the frame and abutted against the reflecting surface of the second single-face mirror, and the isolation plate can be adjusted to abut against the reflecting surface of the second single-face mirror so as to compress or release the telescopic piece.
9. The scanning mirror assembly of claim 8,
the frame is convexly provided with two opposite fixed seats, two opposite ends of the isolation plate are convexly provided with two fixed lugs respectively, and the fixed lugs are detachably arranged on the fixed seats respectively;
and the isolation plate spans the second single-face mirror and the first single-face mirror and divides the second single-face mirror and the first single-face mirror into two parts.
10. The scan mirror assembly of claim 1,
the telescoping member comprises an adhesive tape.
11. Lidar characterized in that it comprises a scanning mirror assembly according to any of claims 1-10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813422.0A CN113534100A (en) | 2021-07-19 | 2021-07-19 | Scanning mirror assembly and laser radar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110813422.0A CN113534100A (en) | 2021-07-19 | 2021-07-19 | Scanning mirror assembly and laser radar |
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