CN219349125U

CN219349125U - Laser radar for vehicle

Info

Publication number: CN219349125U
Application number: CN202223599599.4U
Authority: CN
Inventors: 王鹏; 刘春宝; 徐丹慧
Original assignee: Ruichuang Micro Nano Wuxi Technology Co ltd
Current assignee: Ruichuang Micro Nano Wuxi Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-14
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a laser radar for a vehicle, which comprises a shell provided with an accommodating space, a laser receiving and transmitting module and an MEMS micro-vibrating mirror, wherein the laser receiving and transmitting module is positioned in the accommodating space, the MEMS micro-vibrating mirror is positioned in the accommodating space, the shape of the outer surface of the front end of the shell is configured to be matched with the shape of the inner surface of a windshield, and the front end of the shell is provided with a light window; the laser receiving and transmitting module is used for generating a transmitting light beam and receiving an echo light beam; the MEMS micro-vibrating mirror is arranged facing the optical window; the optical window and the laser receiving and transmitting module are both positioned in front of the MEMS micro-vibrating mirror, and the laser receiving and transmitting module is arranged facing the MEMS micro-vibrating mirror. The vehicle laser radar can utilize the curved surface space in the vehicle to reach the effect of increase vehicle laser radar length, make laser transceiver module can arrange in the place ahead of MEMS micro-mirror that shakes, emission light beam and echo light beam can directly propagate between laser transceiver module and MEMS micro-mirror, save the speculum, simplify vehicle laser radar's inner structure, reduce vehicle laser radar's overall height simultaneously, reduce its abrupt sense in the vehicle.

Description

Laser radar for vehicle

Technical Field

The utility model relates to the technical field of radars, in particular to a laser radar for a vehicle.

Background

Lidar is a radar system that emits laser light to detect characteristics such as distance, azimuth, speed, etc. of a target object, and in recent years, with the vigorous development of the unmanned market, there is an increasing demand for lidar.

The prior laser radar generally comprises a receiving and transmitting module, a reflecting mirror and a micro-mirror module, wherein the receiving and transmitting module is generally arranged at the rear of the micro-mirror module under the influence of the overall size, and laser emitted by the receiving and transmitting module is reflected to the micro-mirror module through the reflecting mirror so as to achieve the purpose of reducing the length of the laser radar. In the aspect of appearance, the whole laser radar is in a plane regular shape.

When the lidar is mounted to the front of the vehicle with an irregular curved surface, such as the junction of the interior roof and the windshield, an additional adapter bracket is required for adapter mounting due to the regular shape of the existing lidar. Therefore, not only is the space for installing the laser radar in the vehicle not reasonably and fully utilized, but also the installation process of the laser radar is complicated by adopting the switching support.

Disclosure of Invention

In view of the above, the present utility model provides a laser radar for a vehicle, which can fully utilize the space in the vehicle and simplify the structure.

The application provides a laser radar for vehicle for install to windshield and juncture of roof, laser radar for vehicle includes:

a housing provided with an accommodating space, wherein the shape of the outer surface of the front end of the housing is configured to be matched with the shape of the inner surface of the windshield, and the front end of the housing is provided with a light window;

the laser receiving and transmitting module is accommodated in the accommodating space and is used for generating a transmitting light beam and receiving an echo light beam;

the MEMS micro-vibration mirror is accommodated in the accommodating space and faces the optical window, and is used for reflecting the emitted light beams from the laser receiving and transmitting module and then emitting the reflected light beams through the optical window and reflecting the echo light beams emitted through the optical window to the laser receiving and transmitting module;

the optical window and the laser receiving and transmitting module are both positioned in front of the MEMS micro-vibrating mirror, and the laser receiving and transmitting module faces the MEMS micro-vibrating mirror.

In some embodiments, the laser transceiver module is disposed obliquely below the MEMS micro-mirror, such that the transmit beam and the echo beam between the laser transceiver module and the MEMS micro-mirror propagate in oblique directions.

In some embodiments, the housing includes a bottom plate, a front end of the bottom plate is an inclined portion inclined from back to front and downward, and the laser transceiver module is mounted at a front end of the inclined portion.

In some embodiments, the housing includes an upper casing, a front end of the upper casing includes a curved surface portion for fitting with the windshield, the curved surface portion extends downward along an arc locus from back to front, and the light window is provided on the curved surface portion.

In some embodiments, the casing includes a bottom plate and an upper cover shell covered on the bottom plate, the upper cover shell is used for being attached to the junction of the windshield and the roof, the light window is arranged at the front end of the upper cover shell, and the bottom plate and the upper cover shell are enclosed to form the accommodating space.

In some embodiments, the upper housing includes a top plate spaced from the bottom plate and a perimeter wall connected between the top plate and the bottom plate, the top plate includes a curved surface portion for fitting with the windshield and a first straight portion connected to one end of the curved surface portion for fitting with the roof, and the light window is provided on the curved surface portion.

In some embodiments, the base plate includes a tilting portion extending obliquely from back to front and downward, and a second straight portion connected to one end of the tilting portion, and the laser transceiver module is mounted to a front end of the tilting portion, and the second straight portion is spaced parallel to the first straight portion.

In some embodiments, a first seal is provided between the base plate and the upper housing.

In some embodiments, a circuit board electrically connected to the laser transceiver module and the MEMS micro-mirror is disposed in the accommodating space, and the circuit board is located at a side of the MEMS micro-mirror away from the optical window.

In some embodiments, the rear end of the housing is provided with an opening communicating with the accommodation space and a rear cover covering the opening, and a second sealing member is arranged between the rear cover and the housing.

In the automotive laser radar provided by the utility model, the shape of the outer surface of the front end of the shell is the same as that of the inner surface of the windshield, so that the front end of the shell can be attached to the windshield, the front end of the shell can be directly installed without a switching bracket, and the installation operation is simplified; and the front end and the windshield laminating of shell for automobile-used laser radar can utilize the curved surface space in the car, in order to reach the effect of increase automobile-used laser radar length, make laser transceiver module can arrange in the place ahead of MEMS micro-mirror, emission light beam and echo light beam can directly propagate between laser transceiver module and MEMS micro-mirror, thereby save the speculum, simplify automobile-used laser radar's inner structure, can also reduce automobile-used laser radar's overall height simultaneously, reduce its abrupt sense in the car.

Drawings

FIG. 1 is a schematic view of a vehicle laser radar according to an embodiment of the present utility model installed at a junction between a windshield and a roof;

FIG. 2 is a schematic structural view of the automotive lidar shown in FIG. 1;

FIG. 3 is a cross-sectional view of the automotive lidar shown in FIG. 2;

fig. 4 is an exploded view of the laser radar for vehicles shown in fig. 2.

In the figure: 10. a laser radar for a vehicle; 100. a roof; 200. a windshield; 12. a housing; 14. a laser receiving and transmitting module; 16. MEMS micro-vibrating mirror; 18. an accommodating space; 20. a light window; 22. a bottom plate; 24. an upper housing; 26. a mounting bracket; 28. a curved surface portion; 30. a top plate; 32. a surrounding wall; 34. a first straight portion; 36. an inclined portion; 38. a second straight portion; 40. a circuit board; 42. a support column; 44. an opening; 46. and a rear cover.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

It should be noted that, in the embodiments of the present utility model, all directional indicators (such as up, down, left, right, front, back, inner, outer, top, bottom … …) are merely used to explain the relative positional relationship between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators correspondingly change.

It will also be understood that when an element is referred to as being "fixed" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1 to 4, an embodiment of the present utility model provides a laser radar 10 for a vehicle, which is installed at the junction between a roof 100 and a windshield 200 in the interior of the vehicle. The laser radar 10 includes a housing 12, a laser transceiver module 14, and a MEMS (Micro-Electro-Mechanical System) Micro-mirror 16, where the housing 12 is fixed in a vehicle and has a receiving space 18, and the laser transceiver module 14 and the MEMS Micro-mirror 16 are both received in the receiving space 18.

The front end of the housing 12 is provided with an optical window 20, the MEMS micro-mirror 16 is disposed facing the optical window 20, and the optical window 20 is located in front of the MEMS micro-mirror 16. The laser transceiver module 14 can generate a transmitting beam and receive an echo beam, and the MEMS micro-resonator 16 is configured to transmit the transmitting beam from the laser transceiver module 14 and then emit the transmitting beam through the optical window 20, and also reflect the echo beam emitted through the optical window 20 to the laser transceiver module 14. Specifically, a window is provided through the front end of the housing 12, and the optical window 20 is installed in the window. In the working process of the laser radar 10 for the vehicle, the laser transceiver module 14 sends out a transmitting beam to the MEMS micro-vibrating mirror 16, and the transmitting beam is reflected by the MEMS micro-vibrating mirror 16 and then irradiates the target object through the optical window 20. According to the principle of reversibility of the light path, laser irradiated onto the target returns along the original path to form an echo beam, the echo beam irradiates onto the MEMS micro-vibrating mirror 16 after passing through the optical window 20, and is reflected to the laser receiving and transmitting module 14 by the MEMS micro-vibrating mirror 16, and finally the laser receiving and transmitting module 14 receives the echo beam, so that the vehicle laser radar 10 can obtain the information of the distance, the azimuth and the like of the target.

The outer surface shape of the front end of the outer shell 12 is configured to conform to the inner surface shape of the windshield 200 and to conform the outer surface of the front end of the outer shell 12 to the inner surface of the windshield 200. Specifically, the outer surface shape of the light window 20 is adapted to the inner surface shape of the windshield 200 so as to be fitted to the windshield 200. The front end of the housing 12 and the light window 20 are attached to the windshield 200, so that the automotive lidar 10 can be directly mounted at the junction between the roof 100 and the windshield 200 without a transfer bracket, thereby simplifying the mounting operation.

The manner of connection between the outer case 12 and the windshield 200 is not limited, and may be fixed together by glue or adhesive bonding, for example.

The laser transceiver module 14 is located in front of the MEMS micro-mirror 16 and is disposed facing the MEMS micro-mirror 16. Because the front end of shell 12 is laminated with windshield 200 for automobile-used laser radar 10 can utilize the curved surface space in the car, in order to reach the effect of increase automobile-used laser radar 10 length, make laser transceiver module 14 can arrange in the place ahead of MEMS micro-galvanometer 16, emission light beam and echo light beam can directly propagate between laser transceiver module 14 and MEMS micro-galvanometer 16, thereby save the speculum, simplify the inner structure of automobile-used laser radar 10, can also reduce the whole height of automobile-used laser radar 10 simultaneously, thereby reduce the abrupt sense of automobile-used laser radar 10 in the car.

The specific number of the laser transceiver modules 14 and the MEMS micro-mirrors 16 is not limited, and may be one or a plurality, and when the number is a plurality, the plurality of laser transceiver modules 14 and the plurality of MEMS micro-mirrors 16 are in one-to-one correspondence, respectively.

The laser transceiver module 14 is disposed obliquely below the MEMS micro-mirror 16, so that the emitted beam and the echo beam between the laser transceiver module 14 and the MEMS micro-mirror 16 propagate along the oblique direction. The laser receiving and transmitting module 14 is arranged obliquely below the MEMS micro-vibrating mirror 16, so that the angle of the emitted light beam generated by the laser receiving and transmitting module 14 meets the incidence requirement, and compared with the mode that the laser receiving and transmitting module 14 is arranged right in front of the MEMS micro-vibrating mirror 16, the distance between the laser receiving and transmitting module 14 and the MEMS micro-vibrating mirror 16 can be increased.

In some embodiments, the housing 12 includes a base 22 and an upper housing 24, the upper housing 24 is disposed over the base 22 and encloses the base 22 to form the receiving space 18, and the laser transceiver module 14 and the MEMS micro-mirror 16 are mounted on the upper housing 24 and/or the base 22. The upper cover 24 is used for being attached to the junction between the windshield 200 and the roof 100, and the light window 20 is provided at the front end of the upper cover 24. Specifically, the laser transceiver module 14 is mounted on the base 22, a mounting bracket 26 is disposed between the upper housing 24 and the base 22, and the mems micro-mirror 16 is mounted on a side of the mounting bracket 26 adjacent to the optical window 20.

A first seal (not shown) is provided between the upper housing 24 and the base 22, the first seal encircling the periphery of the receiving space 18. The first seal provides a sealing effect that prevents water from entering the receiving space 18 from the gap between the upper housing 24 and the bottom plate 22, enhancing the water-proof performance of the automotive lidar 10.

The front end of the upper housing 24 is provided with a curved surface portion 28 extending downward along an arc-shaped path from the rear to the front, the curved surface portion 28 is used for being attached to the windshield 200, and the optical window 20 is arranged on the curved surface portion 28. The outer surface of the curved surface portion 28 is curved to match the shape of the inner surface of the windshield 200, so that the curved surface portion 28 and the windshield 200 are attached together, and the vehicle laser radar 10 fully utilizes the curved surface space at the junction of the roof 100 and the windshield 200.

Specifically, the upper housing 24 includes a top plate 30 spaced from the bottom plate 22 and a perimeter wall 32 connected between the top plate 30 and the bottom plate 22. The roof panel 30 includes a curved surface portion 28 and a first straight portion 34 connected to one end of the curved surface portion 28, the curved surface portion 28 extends obliquely downward from rear to front to fit the windshield 200, the first straight portion 34 is used to fit the roof 100, and the light window 20 is disposed on the curved surface portion 28.

The front end of the base plate 22 is a tilting portion 36 extending obliquely from back to front and downward, and the laser transceiver module 14 is mounted at the front end of the tilting portion 36. The front end of the bottom plate 22 is made to be an inclined part 36, after the laser receiving and transmitting module 14 is installed on the inclined part 36, the laser receiving and transmitting module 14 can be automatically positioned under the MEMS micro-vibrating mirror 16, and the emitted light beam and the echo light beam can be transmitted between the laser receiving and transmitting module 14 and the MEMS micro-vibrating mirror 16 along the inclined direction; the front end of the bottom plate 22 is provided with the inclined portion 36, so that the outer shape of the automotive lidar 10 can be more matched with the curved space at the junction of the roof 100 and the windshield 200, and the abrupt feeling of the automotive lidar 10 can be further reduced.

Specifically, the base plate 22 includes an inclined portion 36 and a second straight portion 38 connected to one end of the inclined portion 36, the inclined portion 36 extends obliquely from back to front and downward, the laser transceiver module 14 is mounted on the front end of the inclined portion 36, and the second straight portion 38 is spaced parallel to the first straight portion 34.

The specific shape of the inclined portion 36 is not limited, and for example, the inclined portion 36 may be a flat plate, that is, a plate having both inner and outer surfaces which are flat, or a curved plate, that is, a plate having both inner and outer surfaces which are curved. When the inclined portion 36 is flat, the laser transceiver module 14 may be bonded to the inner surface of the inclined portion 36, so that the emission beam generated by the laser transceiver module 14 is parallel to the inclined portion 36.

In some embodiments, a circuit board 40 is disposed in the receiving space 18, and the circuit board 40 is electrically connected to the MEMS micro-mirror 16 and the laser transceiver module 14 to control the operation thereof. The circuit board 40 is located on the side of the MEMS micro-mirror 16 away from the optical window 20, avoiding the circuit board 40 from affecting the propagation of the light beam.

The base plate 22 is provided with a plurality of spaced support posts 42 and the circuit board 40 is secured to the support posts 42 such that the circuit board 40 is spaced between the base plate 22 and the top plate 30.

The rear end of the housing 12 is provided with an opening 44 and a rear cover 46, the opening 44 penetrating the housing 12 so as to communicate the accommodation space 18 with the outside, and the rear cover 46 covering the opening 44. Specifically, the opening 44 extends through the perimeter wall 32 of the upper housing 24, and the rear cover 46 can be removed to allow for repair or replacement of the circuit board 40 in the event of a failure of the circuit board 40.

The rear end of the upper housing 24 is provided with a recess, the rear cover 46 is accommodated in the recess, and the outer surface of the rear cover 46 is flush with the outer surface of the upper housing 24 to reduce the abrupt sense of the rear cover 46.

A second seal (not shown) is provided between the rear cover 46 and the housing 12, the second seal encircling the periphery of the opening 44. The second seal has a sealing effect that prevents water from entering the accommodation space 18 from the gap between the rear cover 46 and the housing 12, further enhancing the waterproof performance of the laser radar 10 for vehicles.

The shape of the outer surface of the front end of the shell is the same as that of the inner surface of the windshield, so that the front end of the shell can be attached to the windshield, the front end of the shell can be directly installed without a switching bracket, and the installation operation is simplified; and the front end and the windshield laminating of shell for automobile-used laser radar can utilize the curved surface space in the car, in order to reach the effect of increase automobile-used laser radar length, make laser transceiver module can arrange in the place ahead of MEMS micro-mirror, emission light beam and echo light beam can directly propagate between laser transceiver module and MEMS micro-mirror, thereby save the speculum, simplify automobile-used laser radar's inner structure, can also reduce automobile-used laser radar's overall height simultaneously, reduce its abrupt sense in the car.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. A lidar for a vehicle for mounting to an interface of a windshield (200) and a roof (100), the lidar comprising:

a housing (12) provided with a receiving space (18), wherein the shape of the outer surface of the front end of the housing (12) is configured to be matched with the shape of the inner surface of the windshield (200), and the front end of the housing (12) is provided with a light window (20);

the laser receiving and transmitting module (14) is accommodated in the accommodating space (18), and the laser receiving and transmitting module (14) is used for generating a transmitting light beam and receiving an echo light beam;

the MEMS micro-vibration mirror (16) is accommodated in the accommodating space (18) and is arranged facing the optical window (20), and the MEMS micro-vibration mirror (16) is used for reflecting an emission beam from the laser receiving and transmitting module (14) and then emitting the emission beam through the optical window (20) and reflecting an echo beam emitted through the optical window (20) to the laser receiving and transmitting module (14);

the optical window (20) and the laser receiving and transmitting module (14) are both positioned in front of the MEMS micro-vibrating mirror (16), and the laser receiving and transmitting module (14) is arranged facing the MEMS micro-vibrating mirror (16).

2. The automotive lidar according to claim 1, wherein the laser transceiver module (14) is provided obliquely below the MEMS micro-mirror (16) so that the transmission beam and the echo beam between the laser transceiver module (14) and the MEMS micro-mirror (16) propagate in oblique directions.

3. The automotive lidar according to claim 2, wherein the housing (12) comprises a bottom plate (22), a front end of the bottom plate (22) is an inclined portion (36) inclined from back to front and downward, and the laser transceiver module (14) is mounted to a front end of the inclined portion (36).

4. The automotive lidar according to claim 1, wherein the housing (12) comprises an upper cover shell (24), a front end of the upper cover shell (24) comprises a curved surface portion (28) for fitting with the windshield (200), the curved surface portion (28) extends downward along an arc trajectory from back to front, and the light window (20) is provided on the curved surface portion (28).

5. The automotive lidar according to claim 1, wherein the housing (12) comprises a bottom plate (22) and an upper cover shell (24) covering the bottom plate (22), the upper cover shell (24) is used for being attached to a junction between the windshield (200) and the roof (100), the light window (20) is arranged at the front end of the upper cover shell (24), and the bottom plate (22) and the upper cover shell (24) are enclosed to form the accommodating space (18).

6. The automotive lidar according to claim 5, wherein the upper cover (24) comprises a top plate (30) spaced apart from the bottom plate (22) and a surrounding wall (32) connected between the top plate (30) and the bottom plate (22), the top plate (30) comprises a curved surface portion (28) for fitting with the windshield (200) and a first flat portion (34) connected to one end of the curved surface portion (28) for fitting with the roof (100), and the light window (20) is provided to the curved surface portion (28).

7. The automotive lidar according to claim 6, wherein the bottom plate (22) comprises an inclined portion (36) and a second straight portion (38) connected to one end of the inclined portion (36), the inclined portion (36) extends obliquely from the rear to the front and downward, the laser transceiver module (14) is mounted to the front end of the inclined portion (36), and the second straight portion (38) is spaced parallel to the first straight portion (34).

8. The automotive lidar according to claim 5, characterized in that a first seal is provided between the floor (22) and the upper casing (24).

9. The automotive lidar according to claim 1, wherein a circuit board (40) electrically connected to the laser transceiver module (14) and the MEMS micro-mirror (16) is provided in the accommodating space (18), and the circuit board (40) is located at a side of the MEMS micro-mirror (16) away from the optical window (20).

10. The lidar for vehicles according to claim 9, wherein the rear end of the housing (12) is provided with an opening (44) communicating with the accommodation space (18) and a rear cover (46) covering the opening (44), and a second seal is provided between the rear cover (46) and the housing (12).