Laser detection device and detection equipment

Abstract

The embodiment of the utility model discloses a laser detection device and detection equipment, the laser detection device comprises at least one lens, the lens comprises a lens barrel, a lens group and a hot pressing piece, the lens barrel forms an accommodating cavity, and the section contour of a first port of the accommodating cavity is larger than that of a second port. The hot-pressing member is arranged at the first port and is connected with the lens barrel, and the hot-pressing member is bent through hot pressing and is connected with the surface, close to the first port, of the lens group in an attached manner. According to the invention, the hot-pressing member is arranged at the first port with the larger cross section profile of the lens barrel, and the hot-pressing member is bent through hot pressing and is connected with the surface, close to the first port, of the lens group in an attached manner, so that a pressing force along the optical axis direction of the lens can be provided for the lens group, and the lens group is fixed in the lens barrel along the optical axis direction; the structural design of the hot-pressing piece is more compact, the material cost and the size of the lens can be reduced, the hot-pressing piece can be attached according to the shape of the surface of the lens group, and the manufacturing difficulty of the lens can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of laser detection devices, and particularly to a laser detection device and a detection device. Background Art

[0002] LiDAR mainly includes modules such as an optical system, a hardware system, and a housing. Among them, the optical system mainly includes a lens, a lens holder, a filter, a light-shielding module, etc. The lens is one of the most important optical components. It can correct the light emitted and received by the radar, such as beam expansion, focusing, collimation, etc., so that the light can accurately converge on the transceiver sensor of the radar.

[0003] In the related art, the lens mainly includes components such as a lens barrel, a lens, and a lock ring. Among them, the lens barrel is provided with a structure for the lens and the spacer ring to sink and lean on, and an interface structure for connecting with external structural parts of the lens. Through reasonable structural and tolerance design of the lens barrel, the axial and radial positions of the lens and the spacer ring can be ensured, and the accuracy of LiDAR ranging and perception can be ensured. The lens can refract light and adjust the light trajectory. The function of the lock ring is to press the lens to prevent it from loosening.

[0004] In the related art, the requirements for the position and tilt of the lens are very high, and the manufacturing difficulty of the lens is relatively large. Utility Model Content

[0005] The embodiments of this application provide a laser detection device and a detection device, which are used to improve the current situation in the related art where the requirements for the position and tilt of the lens are very high and the manufacturing difficulty of the lens is relatively large.

[0006] The embodiments of this application provide a laser detection device, including at least one lens. The lens includes a lens barrel, a lens group, and a hot pressing part. The lens barrel forms a receiving cavity, and the receiving cavity has opposite first and second ports. The cross-sectional contour of the first port is larger than that of the second port. The lens group is located in the receiving cavity, and the lens group includes at least one lens. The hot pressing part is arranged at the first port and connected to the lens barrel. The hot pressing part is bent by hot pressing and is adhesively connected to the surface of the lens group close to the first port.

[0007] The embodiments of this application also provide a detection device, including a housing, the above-mentioned laser detection device, and a preset sensor. The housing is provided with a receiving cavity. The laser detection device is received in the receiving cavity. The preset sensor is installed in a sensor installation groove, and the preset sensor is a sensor other than a laser.

[0008] In the laser detection device and detection equipment according to the embodiments of the present application, a hot pressing member is provided at a first port where the cross-sectional profile of the lens barrel is larger, and the hot pressing member is hot-pressed and bent and is adhesively connected to the surface of the lens group close to the first port, so as to provide a pressing force for the lens group in the optical axis direction of the lens, and realize the fixation of the lens group in the lens barrel in the optical axis direction. Compared with the related art in which the lens group is fixed in the optical axis direction by a lock ring, the structural design of the hot pressing member adopted in the embodiments of the present application is more compact, which is beneficial to reducing the material cost and volume of the lens, and the hot pressing member can be fitted according to the shape of the surface of the lens group; in addition, since the positioning and installation of the lock ring are omitted, the manufacturing accuracy requirements of the lens provided in the embodiments of the present application are lower, which is beneficial to reducing the manufacturing difficulty of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0010] Figure 1 is a schematic cross-sectional structure diagram of a laser detection device provided by some embodiments of the present application;

[0011] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the hot pressing member of the transmitting lens in the laser detection device shown before hot pressing and bending;

[0012] Figure 3 is Figure 1 a schematic cross-sectional structure diagram of the hot pressing member of the transmitting lens in the laser detection device shown after hot pressing and bending;

[0013] Figure 4 is Figure 1 a schematic cross-sectional structure diagram of the hot pressing member of the receiving lens in the laser detection device shown before hot pressing and bending;

[0014] Figure 5 is Figure 1 a schematic cross-sectional structure diagram of the hot pressing member of the receiving lens in the laser detection device shown after hot pressing and bending;

[0015] Figure 6 is Figure 1 a schematic three-dimensional structure diagram of the transmitting lens in the laser detection device shown;

[0016] Figure 7 is Figure 1 a schematic three-dimensional structure diagram of the receiving lens in the laser detection device shown;

[0017] Figure 8 is Figure 1 a schematic three - dimensional structure diagram of the shown laser detection device;

[0018] Figure 9 is Figure 1 a schematic three - dimensional structure diagram of the shown laser detection device from another perspective;

[0019] Figure 10 is a schematic structure diagram of the detection device provided by the embodiment of the present application.

[0020] Explanation of reference numerals:

[0021] 1. Laser detection device; 2. Detection device; 3. Housing; 4. Preset sensor;

[0022] 10. Lens; 10a. Emitting lens; 10b. Receiving lens; 11. Lens barrel; 111. Receiving cavity; 112. First port; 113. Second port; 114. Cylinder body; 115. Mounting plate; 12. Lens group; 121. Lens; 13. Hot pressing part; 131. First end; 132. Second end; 133. Hot pressing part; 14. Spacer ring; 141. Light - passing hole; 142. Main body part; 1421. Through - hole; 143. Diaphragm part;

[0023] 20. Bracket; 21. First surface; 22. Second surface; 23. Sensor mounting groove; 231. First groove; 232. Second groove; 24. Substrate; 25. Side wall; 201. Accommodating groove;

[0024] x. First direction; y. Second direction; z. Thickness direction. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application in conjunction with the accompanying drawings.

[0026] When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0027] Please refer to Figure 1 , which shows a schematic cross - sectional structure diagram of the laser detection device 1 provided by some embodiments of the present application. The laser detection device 1 includes at least one lens 10, and the lens 10 includes a lens barrel 11, a lens group 12 and a hot pressing part 13.

[0028] Please refer to Figures 2 to 5, which respectively show Figure 1 A schematic cross-sectional structure diagram of the hot press part 13 of the emission lens 10a in Figure 1 before and after hot press bending, and Figure 1 A schematic cross-sectional structure diagram of the hot press part 13 of the receiving lens 10b in Figure 1 before and after hot press bending. The lens barrel 11 is formed with a receiving cavity 111. The receiving cavity 111 has opposite first and second ports 112 and 113. The cross-sectional profile of the first port 112 is larger than that of the second port 113. The lens group 12 is located in the receiving cavity 111. The lens group 12 includes at least one lens 121. The hot press part 13 is arranged at the first port 112 and connected to the lens barrel 11. The hot press part 13 is hot press bent and is adhesively connected to the surface of the lens group 12 close to the first port 112.

[0029] By arranging the hot press part 13 at the first port 112 with a larger cross-sectional profile of the lens barrel 11, and the hot press part 13 is hot press bent and adhesively connected to the surface of the lens group 12 close to the first port 112, a pressing force in the optical axis direction of the lens 10 can be provided for the lens group 12, so as to realize the fixation of the lens group 12 in the lens barrel 11 in the optical axis direction. Compared with the related art in which the lens group is fixed in the optical axis direction by a lock ring, the structural design of the hot press part 13 adopted in the embodiment of the present application is more compact, which is beneficial to reducing the material cost and volume of the lens 10, and the hot press part 13 can be fitted according to the shape of the surface of the lens group 12; in addition, since the lock ring is omitted, the fixing structures such as the threads for installing the lock ring on the lens barrel 11 and the installation process of the lock ring can also be omitted, so the manufacturing process is relatively simple.

[0030] Specifically, in combination with Figures 2 to 5 , before the hot press part 13 is hot press bent, it extends substantially along the optical axis direction so that internal devices such as the lens group 12 can pass through the hot press part 13 and be installed in the lens barrel 11; after the internal devices such as the lens group 12 are installed in place in the lens barrel 11, a jig can be used to heat the hot press part 13 and push the hot press part 13 to bend towards the surface of the lens group 12 close to the first port 112 and adhere to this surface, so as to realize the fixation of the hot press part 13 on the lens group 12 in the optical axis direction.

[0031] Next, refer to Figures 2 to 5 for a detailed description of the lens barrel 11.

[0032] The lens barrel 11 is formed with a receiving cavity 111, and the receiving cavity 111 is used for installing internal devices such as the lens group 12 to realize the protection of internal devices such as the lens group 12.

[0033] Among them, the receiving cavity 111 has opposite first and second ports 112 and 113, and the cross-sectional profile of the first port 112 is larger than that of the second port 113. The lens barrel 11 is provided with a flange portion at the second port 113 that extends along the axis of the receiving cavity 111 from the second port. Internal components such as the lens group 12 can be installed in the receiving cavity 111 through the first port 112 with a larger cross-sectional profile, and under the constraint of the flange portion at the second port 113 with a smaller cross-sectional profile, the internal components such as the lens group 12 are limited in one direction along the optical axis direction in the receiving cavity 111 (in one direction close to the second port 113). Among them, the limitation of the internal components such as the lens group 12 in the other direction along the optical axis direction in the receiving cavity 111 (in one direction close to the first port 112) can be achieved by the above-mentioned hot pressing member 13.

[0034] In some embodiments, the inner wall surface of the receiving cavity 111 may include a stepped surface facing the first port 112 and departing from the second port 113, and this stepped surface can be used to limit the installation position of internal components such as the lens group 12, improving the installation accuracy of internal components such as the lens group 12 in the receiving cavity 111.

[0035] In some embodiments, the preparation material of the lens barrel 11 includes plastic. Compared with metal, plastic has a lower material cost and can achieve higher manufacturing precision, which is beneficial to reducing the manufacturing cost of the lens 10 and improving the manufacturing yield. Further, the preparation material of the lens barrel 11 can be completely made of plastic, or a mixture of plastic and other materials. For example, plastic + 30% glass fiber. Among them, the plastic can be PC (Polycarbonate), which is heat-resistant, impact-resistant, and has good processing performance.

[0036] In some embodiments, the lens barrel 11 includes a barrel body 114, and the barrel body 114 is generally in a cylindrical structure and forms the above-mentioned receiving cavity 111. In other embodiments, the lens barrel 11 includes a barrel body 114 and a mounting plate 115. The barrel body 114 forms the receiving cavity 111, and the mounting plate 115 extends outward from the side wall of the barrel body 114. Among them, the setting of the mounting plate 115 facilitates the installation and fixation of the lens barrel 11 via this mounting plate 115 to other devices (such as the bracket 20); compared with directly installing and fixing to other devices via the barrel body 114, the mounting plate 115 is in a plate-like structure, so it is more conducive to fixing with external structures. And, since the mounting plate 115 extends outward from the side wall of the barrel body 114, the connection position where it is connected to other devices can be set away from the barrel body 114, and the installation process is not easily restricted by the shape / size of the barrel body 114; and the barrel body itself is not easily deformed due to the fixation of the lens barrel 11, thereby affecting the fixation effect of the internal lenses.

[0037] Among them, the cylinder body 114 and the mounting plate 115 can be of an integral structure to improve the structural strength of the lens barrel 11 and save the assembly process of the lens barrel 11.

[0038] Next, refer to Figures 2 to 5 for a detailed description of the lens group 12.

[0039] The lens group 12 includes at least one lens 121. It can be understood that the lens group 12 can include a single lens 121 or multiple lenses 121 distributed along the optical axis direction. The number of lenses 121 included in the lens group 12 can be flexibly designed according to actual needs, and there is no limitation in this regard. Among them, the lens 121 can be a convex lens, a concave lens, etc., and there is no limitation in this regard.

[0040] It can be understood that the lens 121 and the lens barrel 11 can be connected by methods such as gluing and interference fit. In the embodiment of the present application, the lens 121 and the lens barrel 11 are in interference fit, so that after the lens 121 is assembled in the lens barrel 11, it can be substantially fixed relative to the lens barrel 11, simplifying the assembly process between the lens 121 and the lens barrel 11. Of course, in other embodiments of the present application, the lens 121 and the lens barrel 11 can also be in clearance fit, and then an axial force is applied to the lens group 12 from one end of the lens group 12 close to the first port 112, and the entire lens group 12 is fixed through a fixing structure.

[0041] In some embodiments, the preparation material of the lens 121 can be plastic. When the lens 121 is made of plastic, the manufacturing cost of the plastic is lower, and when the preparation material of the lens barrel 11 also includes plastic, the CTE (Coefficient of Thermal Expansion) of the lens 121 and the lens barrel 11 can be similar, which can reduce the low-temperature thermal stress and the high-temperature thermal expansion gap. In some other embodiments, the preparation material of the lens 121 can also be glass. When the lens 121 is made of glass, the glass has a higher refractive index, and its production can be a general spherical surface or a molded aspherical surface, having better optical performance than plastic. At the same time, the reliability, scratch resistance and wear resistance of the glass, as well as the tests for the environment, are better than those of plastic.

[0042] Refer to Figure 2 and Figure 3 above, the above lens 10 can be a transmitting lens 10a. The transmitting lens 10a is used to receive the detection light generated by a transmitting module (not shown in the figure), perform optical processing such as collimation and aberration correction on the detection light, and direct the detection light to a preset field of view. Among them, the transmitting module includes a transmitting board and a light source module, and the light source module is used to generate detection light to detect a target object.

[0043] In some embodiments, the lens 121 in the transmitting lens 10a is a plastic lens. When the lens 121 in the transmitting lens 10a is made of plastic, the manufacturing cost of the plastic is lower, and when the preparation material of the lens barrel 11 in the transmitting lens 10a also includes plastic, the CTE (Coefficient of Thermal Expansion) of the lens 121 and the lens barrel 11 in the transmitting lens 10a can be made similar, which can reduce the low-temperature thermal stress and the high-temperature thermal expansion gap.

[0044] In some embodiments, in the transmitting lens 10a, the lens group 12 includes three lenses 121 along the optical axis direction, and all three lenses 121 are plastic lenses.

[0045] Refer to Figure 4 and Figure 5 As described above, the lens 10 can be a receiving lens 10b. The receiving lens 10b is used to receive the return light, perform optical processing such as converging and correcting aberration on the return light, and direct the return light to a receiving module (not shown in the figure). The receiving module includes a receiving board and a photoelectric detection module. The photoelectric detection module is used to receive the return light formed by the detection light reflected by the target object.

[0046] In some embodiments, in the receiving lens 10b, the lens 121 includes a plastic lens and a glass lens. Along the direction from the light incident side to the light exit side of the receiving lens 10b, each glass lens is located downstream of the plastic lens. The receiving lens 10b uses a combination of plastic lenses and glass lenses, which has the advantages of low manufacturing cost of plastic and similar CTE (Coefficient of Thermal Expansion) between the plastic lens and the lens barrel 11, weakening the low-temperature thermal stress and the high-temperature thermal expansion gap. In addition, since the lenses in the downstream of the receiving lens 10b mainly play the role of converging and correcting aberration, their optical performance is more important. Designing them as glass lenses can effectively improve the imaging accuracy of the receiving lens 10b.

[0047] In some embodiments, in the receiving lens 10b, the lens group 12 includes five lenses 121 along the optical axis direction. Among the lenses 121, the three lenses 121 close to the light incident side are all plastic lenses, and the remaining lenses 121 are all glass lenses.

[0048] It can be understood that the laser detection device 1 includes at least two lenses 10, and the at least two lenses 10 include a transmitting lens 10a and a receiving lens 10b. Among them, the number of the transmitting lenses 10a can be one or more, and the number of the receiving lenses 10b can be one or more. In the embodiments of the present application, the at least two lenses 10 include two transmitting lenses 10a, and the two transmitting lenses 10a are respectively arranged on both sides of the receiving lens 10b along the illustrated first direction x; wherein, the first direction x is perpendicular to the optical axis direction of the lens 10. At this time, the laser detection device 1 includes two transmitting modules, and the transmitting lens 10a corresponds to the transmitting module one by one. That is to say, the laser detection device 1 in this embodiment has a detection structure of double transmission and single reception. Under the condition of the same detection field of view size, each light source module in the laser detection device 1 can have a smaller number and size specifications of lasers, and thus the light source module can have a better manufacturing yield, which is beneficial to reducing the overall cost of the laser detection device 1.

[0049] Next, refer to Figures 2 to 7 , and a detailed description will be given to the hot pressing part 13.

[0050] The hot pressing part 13 is arranged at the first port 112 and is connected to the lens barrel 11. The hot pressing part 13 is hot pressed and bent and is attached and connected to the surface of the lens group 12 close to the first port 112.

[0051] In some embodiments, the hot pressing part 13 and the lens barrel 11 are of an integral structure. In this way, the assembly process between the hot pressing part 13 and the lens barrel 11 can be saved, and the assembly efficiency of the lens 10 can be improved. It can be understood that the preparation material of the hot pressing part 13 can be the same as that of the lens barrel 11, so as to facilitate the two to be directly formed in one step by processes such as injection molding.

[0052] In some embodiments, the hot pressing part 13 includes a first end 131 connected to the lens barrel 11 and a second end 132 facing away from the lens barrel 11; from the first end 131 to the second end 132, the thickness of the part of the hot pressing part 13 farther away from the first end 131 is smaller. Designing the thickness of the part of the hot pressing part 13 farther away from the lens barrel 11 to be smaller is beneficial to the part of the hot pressing part 13 away from the lens barrel 11 to be hot pressed and bent and attached to the lens group 12.

[0053] In some embodiments, refer to Figure 6 and Figure 7 , which respectively show the three-dimensional structure schematic diagrams of the transmitting lens 10a and the receiving lens 10b in Figure 1 . The hot pressing part 13 is arranged around the first port 112. The hot pressing part 13 can extend around the first port 112 in a ring shape (such as Figure 7 ), or the hot pressing part 13 can include a plurality of hot pressing parts 133 arranged at intervals around the first port 112 (such as Figure 6 ).

[0054] It should be noted that, referring to Figure 1 and Figure 7 , if the hot pressing part 13 is exposed to the laser detection device 1, the hot pressing part 13 can be designed to extend around the first port 112 in a ring shape, so that when the hot pressing part 13 is hot-pressed and bent and the lens group 12 is attached and connected, the hot pressing part 13 can be attached and connected to the lens group 12 in a full circle, improving the waterproof performance of the lens 10. Referring to Figure 1 and Figure 6 , if the hot pressing part 13 is not exposed to the laser detection device 1, the hot pressing part 13 can be designed to include a plurality of hot pressing parts 133 spaced around the first port 112; there is a gap between two adjacent hot pressing parts 133, which can avoid the wrinkles caused by the integral ring structure of the hot pressing part 13 during bending, and thus is beneficial to reducing the difficulty of making each hot pressing part 133 closely fit on the outermost lens surface.

[0055] Of course, the shape of the hot pressing part 13 may not be associated with whether it is exposed to the laser detection device 1, and the hot pressing part 13 exposed to the laser detection device 1 can be designed to extend around the first port 112 in a ring shape according to actual needs, or, include a plurality of hot pressing parts 133 spaced around the first port 112; and the hot pressing part 13 not exposed to the laser detection device 1 extends around the first port 112 in a ring shape, or, includes a plurality of hot pressing parts 133 spaced around the first port 112.

[0056] Next, referring to Figures 2 to 5 , the lens 10 will be further described in detail.

[0057] The lens 10 further includes a spacer ring 14; the lens group 12 includes at least two lenses 121 spaced along the optical axis direction of the lens 10, the spacer ring 14 is arranged along the optical axis direction of the lens 10 between two adjacent lenses 121 and abuts against the two adjacent lenses 121 respectively, and the spacer ring 14 is formed with a light passing hole 141 extending along the optical axis direction of the lens 10. The spacer ring 14 can provide a bearing surface for the lenses 121 to ensure the distance and angle between the lenses 121.

[0058] In some embodiments, the preparation material of the spacer ring 14 includes plastic. Compared with metal, plastic has a lower material cost and can achieve higher manufacturing precision, which is beneficial to reducing the manufacturing cost of the lens 10 and improving the manufacturing yield. Further, the preparation material of the spacer ring 14 can be completely made of plastic, or a mixture of plastic and other materials, for example, plastic + 30% glass fiber. Among them, the plastic can be PC (Polycarbonate), which is heat-resistant, impact-resistant and has good processing performance.

[0059] In some embodiments, the spacer ring 14 is made of the same material as the lens barrel 11. In this way, the CTE (Coefficient of Thermal Expansion) of the spacer ring 14 can be made close to that of the lens barrel 11, reducing the low-temperature thermal stress and the high-temperature thermal expansion gap.

[0060] In some embodiments, at least one spacer ring 14 includes a main body portion 142 and a diaphragm portion 143. The main body portion 142 is disposed between two adjacent lenses 121 along the optical axis direction and abuts against the two adjacent lenses 121 respectively. The main body portion 142 is provided with a through hole 1421 extending along the optical axis direction; the diaphragm portion 143 is formed by extending from the inner wall of the main body portion 142 toward the optical axis of the lens 10, and the diaphragm portion 143 is provided with a light passing hole 141. Among them, the diaphragm portion 143 can reduce stray light and improve the imaging effect. Designing the spacer ring 14 to include the diaphragm portion 143 can save the assembly process of the diaphragm and make the structural design more compact compared with additionally adding a diaphragm.

[0061] It can be understood that any spacer ring 14 in the lens 10 can be designed to include the diaphragm portion 143 according to actual needs. For example, referring to Figure 2 and Figure 3 , among the three lenses 121 of the transmitting lens 10a, along the direction from the incident light side to the outgoing light side of the transmitting lens 10a, the spacer ring 14 located between the second lens 121 and the third lens 121 is designed to include the diaphragm portion 143. Another example, referring to Figure 4 and Figure 5 , among the five lenses 121 of the receiving lens 10b, along the direction from the incident light side to the outgoing light side of the receiving lens 10b, the spacer ring 14 located between the second lens 121 and the third lens 121 is designed to include the diaphragm portion 143.

[0062] The above is a detailed description of the lens 10. Next, referring to Figure 1 , Figure 8 and Figure 9 , other structures in the laser detection device 1 will be further described in detail.

[0063] The laser detection device 1 further includes a bracket 20, and the lens 10 is fixed to the bracket 20.

[0064] In this embodiment, the lens barrel 11 passes through the bracket 20 and is fixed to the bracket 20. That is, the bracket 20 and the lens barrel 11 are separately provided. This setting makes the design and manufacture of the bracket 20 modular, the overall manufacturing process simpler, and is conducive to achieving higher processing accuracy; in addition, when a certain lens barrel 11 is damaged, the lens barrel 11 can be directly replaced without having to replace the entire bracket 20, so it has better interchangeability.

[0065] Specifically, the bracket 20 has a first surface 21 and a second surface 22 opposite to each other in the thickness direction z. The lens barrel 11 includes the above-mentioned barrel body 114 and the above-mentioned mounting plate 115. The barrel body 114 passes through the bracket 20, and the mounting plate 115 is fixed to the first surface 21.

[0066] Furthermore, the mounting plate 115 is located on the side of the bracket 20 where the first surface 21 is provided and is fixed to the bracket 20 by bolts. Preferably, to facilitate the circumferential positioning of the lens barrel 11 when it passes through the bracket 20, one of the bracket 20 and the mounting plate 115 is provided with a first positioning post, and the other is provided with a first positioning hole. The first positioning post extends into the first positioning hole, thereby realizing the positioning of the lens barrel 11.

[0067] In some other embodiments of the present application, the lens barrel 11 and the bracket 20 may also be of an integral structure, which is beneficial to saving the assembly process of the lens barrel 11 and the bracket 20 and improving the structural strength of the lens barrel 11.

[0068] Specifically, the lens barrel 11 includes a first barrel body, which is generally in a cylindrical structure and is provided on the above-mentioned first surface 21. The first barrel body has a first inner hole penetrating in the above-mentioned thickness direction z. Correspondingly, the bracket 20 is provided with a first through hole at the corresponding position of the first barrel body; the first through hole communicates with the above-mentioned first inner hole and together constitutes the accommodation cavity 111 or a part of the accommodation cavity 111 for installing the lens group 12.

[0069] Furthermore, the lens barrel 11 further includes a second barrel body, which is in a cylindrical structure, is provided on the above-mentioned second surface 22, and surrounds the above-mentioned first through hole. The second barrel body has a second inner hole, and the above-mentioned first inner hole, the first through hole, and the second inner hole are sequentially communicated and together constitute the accommodation cavity 111; the above-mentioned lens group 12 is installed in the accommodation cavity 111.

[0070] It can be understood that even though this embodiment is described by taking the first barrel body and the second barrel body being provided on both sides of the bracket 20 as an example, the present application is not limited thereto. As long as at least one side of the bracket 20 is provided with the above-mentioned first barrel body or the second barrel body to enable the installation of the lens group 12.

[0071] It should also be understood that even though this embodiment is described by taking the integrally formed structure of the lens barrel 11 and the bracket 20 as an example, the present application is not limited thereto. In other embodiments of the present application, the first barrel body of the lens barrel 11 may also be separately provided relative to the bracket 20 and fixed to the bracket 20 by means of screwing or the like, and the second barrel body may also be separately provided relative to the bracket 20 and fixed to the bracket 20 by means of screwing or the like.

[0072] It is understandable that the lens barrel 11 passes through the bracket 20 and is fixed to the bracket 20, or the lens barrel 11 and the bracket 20 are designed as an integrated structure, which can be applicable to both the transmitting lens 10a and the receiving lens 10b, and there is no limitation on this.

[0073] In some embodiments, the transmitting module is disposed on a side of the bracket 20 having the second surface 22, and is located along the optical axis of the transmitting lens 10a on a side of the transmitting lens 10a away from the bracket 20. The receiving module is disposed on a side of the bracket 20 having the second surface 22, and is located along the optical axis of the receiving lens 10b on a side of the receiving lens 10b away from the bracket 20.

[0074] It should be noted that in the embodiment of the present application, the length of the receiving lens 10b is longer than that of the transmitting lens 10a. Therefore, along the above-mentioned thickness direction z, the receiving module is also located on the side of the transmitting module away from the second surface 22; the layered arrangement of the transmitting module and the receiving module in the embodiment of the present application is beneficial to reducing the distance between the transmitting lens 10a and the receiving lens 10b, thereby reducing the size occupied by the laser detection device 1 in the first direction x, and is also beneficial to reducing the detection blind spot of the laser detection device 1.

[0075] The specific structure of the bracket 20 is further supplemented. The bracket 20 includes a base plate 24 and a side wall 25, wherein the base plate 24 is a flat plate-like structure as a whole, and has a first surface 21 and a second surface 22 arranged opposite to each other along the thickness direction z shown in the figure. The side wall 25 is located on the side of the base plate 24 where the second surface 22 is provided, and extends from the edge of the base plate 24 along the thickness direction z, and the side wall 25 and the base plate 24 together enclose a receiving groove 201; that is, the base plate 24 and the side wall 25 together make the bracket 20 a nearly plate-like structure with a shallow groove.

[0076] To facilitate the integration of the laser detection device 1 with other sensors, the above-mentioned bracket 20 (such as the substrate 24) can also be provided with a sensor mounting groove 23 formed inwardly from the first surface 21, and the sensor mounting groove 23 is used to install a preset sensor 4; wherein, the preset sensor 4 can be a sensor other than a millimeter wave radar, a camera or other laser radar.

[0077] In this embodiment, the above-mentioned sensor installation groove 23 is located at the edge of the bracket 20 (e.g., the substrate 24), and is spaced along the illustrated second direction y from the receiving lens 10b; wherein, the second direction y is perpendicular to the above-mentioned thickness direction z and the first direction x respectively. The sensor installation groove 23 includes a first groove 231 and a second groove 232. The first groove 231 is recessed from the first surface 21 and penetrates through the bracket 20 (e.g., the substrate 24 and the side wall 25) along the thickness direction z; thus, the first groove 231 forms an opening on the side facing away from the receiving lens 10b, so that sensors of more size specifications can be adapted. Of course, in other embodiments, the first groove 231 may not penetrate the substrate 24, nor penetrate the side wall 25. The first groove 231 is used to accommodate at least a part of the preset sensor 4; the cross-sectional profile of the first groove 231 perpendicular to the above-mentioned thickness direction z is larger than that of the second groove 232, so it can be used to accommodate the main body part of the preset sensor 4. The second groove 232 is also recessed from the first surface 21, and is provided at the edge of the first groove 231 and communicates with the first groove 231. The second groove 232 does not penetrate the substrate 24, that is, the second groove 232 is a blind groove, and the second groove 232 is used to install the part for fixed connection in the preset sensor 4. In this embodiment, the bottom surface of the second groove 232 is provided with a threaded hole for cooperating with fasteners such as bolts or screws to fix the above-mentioned preset sensor 4 to the second groove 232. In this embodiment, the sensor installation groove 23 includes two second grooves 232, and along the above-mentioned first direction x, the two second grooves 232 are respectively provided on both sides of the first groove 231.

[0078] In addition, the laser detection device 1 further includes a main circuit board, which is electrically connected to the above-mentioned transmitting board and receiving board respectively to supply power to both and communicate with both respectively. Specifically, the main circuit board is integrally in a plate-like structure, and includes a circuit substrate and a plurality of electronic devices provided on the circuit substrate. The main circuit board is disposed opposite to the above-mentioned substrate 24 and is carried on the side of the side wall 25 facing away from the substrate 24. The circuit substrate of the main circuit board is carried on the side wall 25 and seals the above-mentioned accommodation groove 201. Electronic devices are provided on the side of the circuit substrate facing the substrate 24. Since this part of the electronic devices is integrally accommodated in the accommodation groove 201, a good electromagnetic shielding effect can be achieved, and mutual interference with electronic devices outside the accommodation groove 201 can be avoided. It should be noted that in this embodiment, the side wall 25 is provided to support and install the main circuit board, and at the same time form an electronic shield for the devices in the accommodation groove 201, but in some other embodiments, the side wall 25 can be omitted.

[0079] The above-mentioned emission module is arranged on the side of the main circuit board away from the substrate 24 and is electrically connected to the main circuit board. In order to enable the detection light generated by the emission module to pass through the main circuit board and the emission lens 10a and exit outside the laser detection device 1 to detect the target object, the main circuit board is provided with a third through hole at a position corresponding to the emission lens 10a, and the third through hole is used for the above-mentioned detection light to pass through. In this way, the detection light generated by the emission module will sequentially pass through the third through hole and the emission lens 10a and exit outside the laser detection device 1. Of course, the emission lens 10a can also be arranged through the third through hole; at this time, the third through hole is used to avoid the emission lens 10a and allow the detection light to pass through the main circuit board.

[0080] The above-mentioned reception module is arranged on the side of the main circuit board away from the substrate 24 and is electrically connected to the main circuit board respectively. In order to enable the return light to pass through the main circuit board and reach the reception module, the main circuit board is provided with a fourth through hole at a position corresponding to the reception lens 10b, and the fourth through hole is used for the above-mentioned return light to pass through. In this embodiment, the reception lens 10b integrally passes through the main circuit board, that is, the fourth through hole is used to avoid the reception lens 10b and at the same time allow the return light to pass through the main circuit board. Of course, in other embodiments of the present application, the reception lens 10b can also be entirely located on the side of the main circuit board facing the substrate 24; at this time, the fourth through hole is only used for the return light to pass through.

[0081] In summary, the laser detection device 1 provided by the embodiment of the present application includes a lens 10 (emission lens 10a and reception lens 10b), a bracket 20, an emission module, a reception module, and so on. Among them, the lens 10 (emission lens 10a and reception lens 10b), the emission module, and the reception module are all installed on the bracket 20.

[0082] Compared with the solution of a lidar in the related art, which includes a housing, a mounting bracket, an emission lens, a reception lens, an emission module, and a reception module, the laser detection device provided by the embodiment of the present application does not additionally include a housing, but realizes the installation of the lens 10 (emission lens 10a and reception lens 10b), the emission module, and the reception module through the bracket 20. Therefore, it can be packaged with other sensors into a sensing module with a smaller volume, which is beneficial to reducing the volume of the entire sensing module. At the same time, since the housing is omitted, the manufacturing process of the laser detection device 1 and even the entire sensing module is shortened, and the manufacturing cost is also reduced to a certain extent.

[0083] Based on the same inventive concept, the present application also provides a detection device. Please refer to Figure 10, which shows a schematic diagram of the detection device 2. The detection device 2 includes a housing 3, the laser detection device 1 in any of the above embodiments, and a preset sensor 4. Among them, the housing 3 is provided with an accommodation cavity to accommodate the laser detection device 1 and the preset sensor 4, and it is also a protection structure for devices such as the laser detection device 1 and the preset sensor 4. The laser detection device 1 is arranged in the accommodation cavity, and the housing 3 is provided with a window sheet on the side where the laser detection device 1 emits and receives laser beams, so as to realize the emission and reception of detection light and return light. The preset sensor 4 is arranged in the above-mentioned sensor mounting groove 23. The preset sensor is a sensor other than lidar, and it is used to cooperate with the laser detection device to obtain environmental information more comprehensively. In this embodiment, the preset sensor is a camera; thus, the detection device 2 can obtain point cloud information related to the surrounding environment based on the laser detection device 1 and obtain image information of the surrounding environment based on the camera; the laser detection device and the camera can work simultaneously to improve the real-time detection ability of the detection device, and the laser detection device and the camera can also work independently according to the actual scene needs to reduce the overall power consumption while meeting the detection requirements. Of course, in other embodiments of the present application, the above-mentioned preset sensor can also be a millimeter-wave radar or other types of sensors, and the present application does not make specific limitations on this.

[0084] Since it includes the laser detection device 1 in the above embodiment, the detection device 2 can achieve a smaller volume, and at the same time, the manufacturing process can be shortened to a certain extent and the manufacturing cost can be reduced.

[0085] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means at least two, for example, two, three, four, etc. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally means that the associated objects before and after are in an "or" relationship.

[0086] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited by this. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A laser detection device, characterized in that, The method comprises at least one lens, wherein the lens comprises: The lens barrel is formed with a receiving cavity, wherein the receiving cavity has a first port and a second port opposite to each other, and a cross-sectional profile of the first port is larger than a cross-sectional profile of the second port; A lens group, located in the receiving cavity, the lens group includes at least one lens; and A heat-pressed component is disposed at the first port and connected to the lens barrel. The heat-pressed component is bent by heat pressing and is bonded to a surface of the lens assembly close to the first port.

2. The laser detection device according to claim 1, characterized in that, The heat-pressing piece and the lens barrel are an integrated structure.

3. The laser detection device according to claim 1, wherein The hot pressing member comprises a first end connected to the lens barrel and a second end facing away from the lens barrel; From the first end to the second end, the thickness of the hot pressing part becomes smaller at a location farther away from the first end.

4. The laser detection device according to claim 1, wherein The heat pressing member is arranged around the first port; The heat pressing member extends in a ring shape around the first port, or the heat pressing member includes a plurality of heat pressing parts spaced apart around the first port.

5. The laser detection device according to claim 1, wherein The lens barrel is made of plastic.

6. The laser detection device according to claim 1, characterized in that, The lens also includes a spacer ring; The lens group includes at least two lenses spaced apart along the optical axis direction of the lens, the spacer ring is arranged between two adjacent lenses along the optical axis direction of the lens and respectively abuts against the two adjacent lenses, and the spacer ring is formed with a light hole extending along the optical axis direction of the lens.

7. The laser detection device according to claim 6, wherein, At least one of the spacer rings comprises a main body and an aperture part, wherein the main body is arranged between two adjacent lenses along the optical axis direction and respectively abuts against two adjacent lenses, the main body is provided with a through hole extending along the optical axis direction, the aperture part is extended from the inner wall of the main body toward the optical axis of the lens, and the aperture part is provided with the light-through hole; And / or, the material of the spacer ring includes plastic; And / or, the spacer ring and the lens barrel are made of the same material.

8. The laser detection device according to any one of claims 1 to 7, characterized in that The method comprises at least two lenses, wherein the at least two lenses comprise: Transmitting lens, wherein the lens in the transmitting lens is a plastic lens; and / or, A receiving lens, wherein the lenses in the receiving lens include a plastic lens and a glass lens, and the direction from the light-entering side of the receiving lens to the light-exiting side is pointed, and each of the glass lenses is located downstream of the plastic lens; The at least two lenses include two transmitting lenses, and the two transmitting lenses are arranged on both sides of the receiving lens along a first direction, and the first direction is perpendicular to the optical axis direction of the lens.

9. The laser detection device according to claim 8, wherein, The laser detection device satisfies at least one of the following conditions: a) In the transmitting lens, the lens group includes three lenses along the optical axis; b) In the receiving lens, the lens group includes five lenses along the optical axis direction, three lenses close to the light incident side of each lens are plastic lenses, and the remaining lenses are glass lenses.

10. The laser detection device according to claim 1, characterized in that, It also includes a bracket, the lens barrel passes through the bracket and is fixed to the bracket; the bracket has a first surface and a second surface opposite to each other along the thickness direction; The lens barrel comprises a barrel body and a mounting plate. The barrel body passes through the bracket. The housing cavity is formed on the barrel body. The mounting plate is formed by extending outward from the side wall of the barrel body. The mounting plate is fixed to the first surface.

11. The laser detection device according to claim 10, characterized in that, The bracket is provided with a sensor mounting groove recessed from the first surface, and the sensor mounting groove is used for mounting a preset sensor; Wherein, the preset sensor includes a millimeter-wave radar and / or a camera.

12. A detection device, characterized in that, Comprising: A housing having an accommodation cavity; The laser detection device according to claim 11, the laser detection device being received in the accommodation cavity; and A preset sensor mounted in the sensor mounting groove, the preset sensor being a sensor other than a laser.

Images