CN220772347U

CN220772347U - Light beam detection device

Info

Publication number: CN220772347U
Application number: CN202322606621.1U
Authority: CN
Inventors: 吴佳
Original assignee: Beijing Liangdao Intelligent Vehicle Technology Co ltd
Current assignee: Beijing Liangdao Intelligent Vehicle Technology Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-04-12
Anticipated expiration: 2033-09-25

Abstract

The application provides a light beam detection device belongs to laser radar technical field for solve the big problem of laser beam detection degree of difficulty. The light beam detection device includes: the detection mechanism comprises a collimator and a detector body; the collimator comprises a receiving end and an output end; the receiving end is used for receiving the light beam; the detector body is connected to the output end of the collimator. The adjusting mechanism comprises a first adjusting part, a second adjusting part and a rotation adjusting part; the second adjusting part is arranged on the first adjusting part and can move along the first direction on the first adjusting part; the rotation adjusting part is arranged on the second adjusting part and can move along the second direction on the second adjusting part; the detection mechanism is arranged on the rotation adjusting part and can rotate on the rotation adjusting part. The light beam detection device can be used for detecting the laser beams with larger distance and size, and the position and the angle are flexible to adjust.

Description

Light beam detection device

Technical Field

The application belongs to the technical field of laser radar, and particularly relates to a light beam detection device.

Background

With the rapid development of the automobile industry, lidar is widely used in vehicles. The beam emitted by the lidar is typically a collimated beam. In order to ensure that the laser beam emitted by the laser radar can meet the requirements after being collimated, the position and the shape of the beam cross section of the collimated laser beam need to be detected to obtain the laser beam quality, and the laser beam quality can directly influence the application range and the efficiency of laser. For beam detection of a laser radar, a target plate method and a fold mirror method are often used. The target plate method is to place a detector at a distance to receive the collimated light beam, analyze the imaging quality of the light beam, or place a target plate at a distance to receive the collimated light beam, and shoot the light beam by using a camera. The fold mirror method is to place a plane mirror or a reflecting prism at a distance to receive the collimated light beam and reflect the light beam to a detector to receive the light beam. In the detection mode of the target plate method, the larger light beam cannot be detected due to the smaller caliber of the detector; when a camera is used to shoot a light beam projected on a target plate, the shot light beam is difficult to reflect a real light spot due to scattering of the surface of the target plate and the like. The detection distance of the fold-back mirror method is relatively short, and the detector is easily damaged by laser beams with concentrated energy, and noise points at a receiving end are easily caused by adding an attenuation sheet.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art or related technologies.

The application provides a light beam detection device, including: the detection mechanism comprises a collimator and a detector body; the collimator comprises a receiving end and an output end; the receiving end is used for receiving the light beam; the detector body is connected to the output end of the collimator. The adjusting mechanism comprises a first adjusting part, a second adjusting part and a rotation adjusting part; the second adjusting part is arranged on the first adjusting part and can move along the first direction on the first adjusting part; the rotation adjusting part is arranged on the second adjusting part and can move along the second direction on the second adjusting part; the detection mechanism is arranged on the rotation adjusting part and can rotate on the rotation adjusting part.

Optionally, the collimator includes: a cylindrical shell; the two ends of the shell are respectively a receiving end and an output end. The objective lens group and the reticle are positioned in the shell; the objective lens group is close to the receiving end; the reticle is close to the output end; the light beam received by the receiving end can be imaged on the reticle after passing through the objective lens group; the reticle is connected to the detector body through a photoelectric converter.

Optionally, the collimator further includes: the laser display card is positioned at the receiving end of the collimator.

Optionally, the collimator further includes: the attenuation sheet is arranged in the collimator; the attenuation piece is positioned on one side of the objective lens group, which is close to the receiving end.

Optionally, the collimator further includes: the narrow-band filter is arranged in the collimator; the narrow-band filter is positioned on one side of the objective lens group, which is close to the receiving end.

Optionally, the first adjusting part includes: a first base including a first bottom plate and a pair of first support plates; the pair of first supporting plates are oppositely arranged on two sides of the first bottom plate. At least one first guide rod, which is parallel to each other and is arranged between a pair of first support plates; the second adjusting part is slidably arranged on the first guide rod. The first lead screw is connected between the second adjusting part and the first supporting plate and is parallel to the first guide rod; the first lead screw can be rotated to drive the second adjusting part to slide on the first guide rod.

Optionally, the second adjusting part includes: the second base is arranged on the first adjusting part; the second base comprises a second bottom plate and a pair of second support plates; the pair of second supporting plates are oppositely arranged on two sides of the second bottom plate. At least one second guide rod, which is parallel to each other and is arranged between the pair of second support plates; the rotation adjusting part is slidably arranged on the second guide rod. The second lead screw is connected between the rotation adjusting part and the second supporting plate and is parallel to the second guide rod; rotating the second lead screw can drive the rotation adjusting part to slide on the second guide rod.

Optionally, the rotation adjusting part includes: the third base is arranged on the second adjusting part. The rotary disc is rotatably arranged on the third base; the rotary disc is provided with scale marks; the detection mechanism is arranged on the turntable and synchronously rotates along with the turntable.

Optionally, the detection mechanism further comprises: a bracket; the detection mechanism is arranged on the rotation adjusting part through a bracket.

Optionally, the detection mechanism further comprises: the display is connected to the detector body.

Advantageous effects

The beam detection device provided by the embodiment of the utility model receives and images the beam by using the collimator, and obtains the beam imaging effect by using the detection body, so that the beam detection device can be used for detecting laser beams with larger distance and size, can be placed at any distance of detection target positions within the laser radar field of view, and can ensure the complete receiving of the beams by arranging the adjusting mechanism to adjust the position and the orientation of the detecting mechanism.

Drawings

Fig. 1 is a schematic perspective view of a beam detection device according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a detection mechanism according to one embodiment provided herein;

fig. 3 is a schematic view of an internal optical path of a collimator according to an embodiment of the present application.

The reference numerals are expressed as:

1. a collimator; 2. a detector body; 3. a first adjusting part; 4. a second adjusting part; 5. a rotation adjusting section; 6. an objective lens group; 7. a reticle; 8. a bracket; 9. a light beam;

31. a first base; 32. a first guide bar; 33. a first lead screw; 34. a first hand wheel;

41. a second base; 42. a second guide bar; 43. a second lead screw; 44. the second hand wheel;

51. a third base; 52. a turntable;

81. a fixing plate; 82. and (5) connecting a plate.

Detailed Description

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

The embodiment provides a light beam detection device. Fig. 1 is a schematic perspective view of a beam detection apparatus according to the present embodiment.

As shown in fig. 1, the light beam detection apparatus of the present embodiment includes: a detection mechanism and an adjusting mechanism. The detection mechanism comprises a collimator 1 and a detector body 2. The collimator 1 includes a receiving end and an output end. The receiving end is used for receiving the light beam. The detector body 2 is connected to the output end of the collimator 1. The adjustment mechanism includes a first adjustment portion 3, a second adjustment portion 4, and a rotation adjustment portion 5. The second adjusting portion 4 is provided on the first adjusting portion 3, and the second adjusting portion 4 is movable in the first direction on the first adjusting portion 3. The rotation adjusting portion 5 is provided on the second adjusting portion 4, and the rotation adjusting portion 5 is movable in the second direction on the second adjusting portion 4. The detection mechanism is provided on the rotation adjustment portion 5, and the detection mechanism can rotate on the rotation adjustment portion 5.

In some examples, as shown in fig. 1, the first direction and the second direction have an included angle therebetween. By the arrangement, the adjusting range can be enlarged, and the accuracy of beam detection can be improved. Preferably, the angle between the first direction and the second direction is 90 °.

The collimator 1 of the present embodiment is an important device for photoelectric detection and optical system calibration, and is also an important member of an optical metrology apparatus, and in the present embodiment, the collimator 1 is mainly used for checking the linearity of a light beam.

The beam detection device provided in this embodiment uses the collimator 1 to receive the beam and image, and uses the detection body 2 to obtain the beam imaging effect, so that the beam detection device can be used for detecting laser beams with larger distance and size, can be placed at any distance in the laser radar field of view range to detect the target position, and can ensure the complete receiving of the beam by setting the adjusting mechanism to adjust the position and the orientation of the detecting mechanism.

Fig. 3 is a schematic view of an internal light path of a collimator according to the present embodiment. In some embodiments, referring to fig. 1 and 3, the collimator 1 includes: a housing, an objective lens group 6 and a reticle 7. The shell is cylindrical. The two ends of the shell are respectively a receiving end and an output end. The objective lens group 6 and reticle 7 are located in the housing. The objective lens group 6 is close to the receiving end. The reticle 7 is close to the output end. The light beam 9 received at the receiving end is passed through the objective lens group 6 and can be imaged on the reticle 7. The reticle 7 is connected to the detector body 2 via a photoelectric converter.

In some examples, referring to fig. 1 and 3, the number of reticles 7 is multiple and the specifications are different. When the beam detection is performed, the proper reticle 7 can be replaced according to the parameters of the objective lens group 6 or the beam 9, so that the application range is enlarged, and the accuracy of the detection result is improved.

In some examples, as shown in fig. 3, the objective lens group 6 includes two lenses, which are a convex lens and a concave lens, respectively, along the propagation direction of the optical path, and the two lenses are closely attached. So set up, be favorable to improving the definition of formation of image. It will be appreciated that in other embodiments, the objective lens 6 may be combined in other ways, such as a combination of two cemented lens groups and a single lens, a combination of two cemented lens groups, etc. Specifically, the lens combination manner, the types, the numbers and the arrangement manners of the lenses included in the lens group 6 may be set according to the actual use requirements, so long as the imaging on the reticle 7 can be clear and complete, which is not limited in this embodiment too.

The beam detection device of the embodiment receives the beam by the collimator 1, images the received beam at the reticle 7 of the inner matching part, and converts the light spot signal of the beam 9 into an electric signal by the switched photoelectric converter to be transmitted to the detector body 2, so as to obtain the shape information of the light spot, and has higher detection precision.

In some embodiments, referring to fig. 1 and 3, the collimator 1 further includes: a laser display card. The laser display card is positioned at the receiving end of the collimator 1.

In some examples the laser display card is a plastic material. The laser display card made of plastic is light, thin, durable, convenient to operate and beneficial to cost reduction.

The collimator 1 of this embodiment includes the laser display card, when the laser radar uses the infrared band beyond the visible light, and when the position of laser beam can't be discerned to the bore hole, place the laser display card in light beam detection device front end to with invisible near infrared light, shortwave infrared light conversion for visible light, the user can adjust collimator 1's position and angle more conveniently through the light path of observing laser, in order to receive complete light beam.

In some embodiments, referring to fig. 1 and 3, the collimator 1 further includes: an attenuation sheet. The attenuation sheet is provided in the collimator 1. The attenuation piece is located on the side of the objective lens group 6 near the receiving end.

The attenuation sheet is also called a neutral attenuation sheet or an optical attenuation sheet, and refers to a sheet-like element which is made into a sheet shape by utilizing the light absorption property of a substance and is placed on an optical path to attenuate light intensity. The attenuation sheet of the present embodiment is located on the side of the objective lens 6 near the receiving end, but in other embodiments, the attenuation sheet may be located on the side of the objective lens 6 far from the receiving end, which is not limited in this embodiment.

In the present embodiment, the attenuation sheet is provided in the collimator 1 to adjust the brightness of the received light, thereby preventing the detection mechanism from being damaged.

In some embodiments, referring to fig. 1 and 3, the collimator 1 further includes: a narrowband filter. The narrow band filter is disposed in the collimator 1. The narrowband filter is located on the side of the objective lens group 6 near the receiving end.

The narrowband filter is subdivided from the bandpass filter, and is defined as the bandpass filter, that is, the filter allows the optical signal to pass in a specific wavelength band, and the optical signals on two sides deviating from the wavelength band are blocked, and the passband of the narrowband filter is relatively narrow, typically less than 5% of the central wavelength value.

In this embodiment, the narrow-band filter is disposed in the collimator 1, so as to filter light rays of other wavebands, so as to reduce interference of ambient light and ensure imaging quality.

In some embodiments, as shown in fig. 1, the first adjusting part 3 includes: a first base 31, at least one first guide rod 32, a first lead screw 33. The first chassis 31 includes a first base plate and a pair of first support plates. The pair of first supporting plates are oppositely arranged on two sides of the first bottom plate. The first guide rods 32 are erected between a pair of first support plates in parallel with each other. The second adjusting portion 4 is slidably disposed on the first guide rod 32. The first lead screw 33 is connected between the second adjusting portion 4 and the first support plate, and the first lead screw 33 is parallel to the first guide bar 32. Rotation of the first lead screw 33 drives the second adjustment portion 4 to slide on the first guide bar 32.

In some examples, as shown in fig. 1, the first base 31 includes a first base plate and a pair of first support plates symmetrically disposed at both ends of the first base plate in a length direction. Thus, a sufficient moving space can be provided for the second regulating portion 4. However, in other embodiments, the pair of first support plates may be symmetrically disposed at both ends of the first bottom plate in the width direction, or disposed on the plate surface of the first bottom plate, which is not limited in this embodiment.

In some examples, as shown in fig. 1, the first adjusting part 3 includes two first guide rods 32, and the two first guide rods 32 are respectively disposed at both sides of the first lead screw 33. By doing so, the operation of the second adjusting portion 4 can be made more stable.

In some examples, as shown in fig. 1, the first lead screw 33 is erected between a pair of first support plates, and one end of the first lead screw 33 passes through one first support plate and is connected to one first hand wheel 34. So arranged, the first lead screw 33 can be rotated easily.

The first adjusting part 3 of the present embodiment includes a first base 31, at least one first guide bar 32, and a first lead screw 33. The second adjusting part 4 is slidably disposed on the first guide rod 32, the first screw 33 is disposed between a pair of support plates and passes through a threaded hole on the second adjusting part 4, and the second adjusting part 4 can be driven to move along the first guide rod 32 by rotating the first screw 33, so as to realize position adjustment in the first direction.

In some embodiments, as shown in fig. 1, the second adjusting part 4 includes: a second base 41, at least one second guide rod 42, a second lead screw 43. The second mount 41 is provided on the first adjusting portion 3. The second base 41 includes a second bottom plate and a pair of second support plates. The pair of second supporting plates are oppositely arranged on two sides of the second bottom plate. The second guide rods 42 are erected between a pair of second support plates in parallel with each other. The rotation adjusting portion 5 is slidably disposed on the second guide rod 42. The second lead screw 43 is connected between the rotation adjusting portion 5 and the second support plate, and the second lead screw 43 is parallel to the second guide rod 42. Turning the second screw 43 can drive the rotation adjusting portion 5 to slide on the second guide bar 42.

In some examples, as shown in fig. 1, the second base 41 includes a second base plate and a pair of second support plates symmetrically disposed at both ends of the second base plate in a length direction. By doing so, a sufficient moving space can be provided for the rotation adjusting portion 5. However, in other embodiments, the pair of second support plates may be symmetrically disposed at both ends of the second bottom plate in the width direction, or disposed on the plate surface of the second bottom plate, which is not limited in this embodiment.

In some examples, as shown in fig. 1, the second base plate is slidably disposed on two first guide rods 32, and the first lead screw 33 passes through a threaded hole in the second base plate. By doing so, the operation of the second adjusting portion 4 can be made more stable.

In some examples, as shown in fig. 1, the second adjusting part 4 includes two second guide rods 42, and the two second guide rods 42 are respectively disposed at both sides of the second screw 43. By doing so, the rotation adjusting portion 5 can be made to operate more stably.

In some examples, as shown in fig. 1, the second lead screw 43 is erected between a pair of second support plates, and one end of the second lead screw 43 passes through one second support plate and is connected to one second hand wheel 44. Thus, the second screw 43 can be easily rotated.

The second adjusting part 4 of the present embodiment includes a second base 41, at least one second guide rod 42, and a second screw 43. The second adjusting portion 4 is slidably disposed on the second guide rod 42, the second lead screw 43 is disposed between a pair of support plates and passes through a threaded hole on the rotation adjusting portion 5, and the rotation adjusting portion 5 can be driven to move along the second guide rod 42 by rotating the second lead screw 43, so as to realize position adjustment in a second direction.

In some embodiments, as shown in fig. 1, the rotation adjusting part 5 includes: a third base 51 and a turntable 52. The third mount 51 is provided on the second adjusting portion 4. The turntable 52 is rotatably disposed on the third base 51. The turntable 52 is provided with scale marks. The detection mechanism is arranged on the turntable 52 and synchronously rotates with the turntable 52.

In some examples, as shown in fig. 1, a third base 51 is slidably disposed on a pair of second guide rods 42, and the second lead screw 43 passes through a threaded hole in the third base 51. By rotating the second screw 43, the third base 51 is driven to move along the second guide rod 42, and the detection mechanism is driven to move along the second guide rod 42.

In the embodiment, the detection mechanism is arranged on the rotary table 52, and the rotary table 52 can be rotated to drive the detection mechanism to rotate so as to adjust the angle of the detection mechanism; by rotating the second screw 43, the detection mechanism can be driven to move in the second direction; through rotating first lead screw 33, can drive detection mechanism and follow the first direction and remove, convenient to use adjusts in a flexible way.

Fig. 2 is a schematic structural diagram of a detection mechanism according to the present embodiment. In some embodiments, as shown in fig. 1 and 2, the detection mechanism further comprises: and a bracket 8. The detection mechanism is arranged on the rotation adjusting part 5 through a bracket 8.

In some examples, as shown in fig. 1, the bracket 8 includes a fixed plate 81 and a pair of connecting plates 82. The fixing plate 81 is provided on the turntable 52, and the collimator 1 is erected on the fixing plate 81 through a pair of connection plates 82. By this arrangement, the mounting structure of the collimator 1 can be made more stable.

The detection mechanism of the embodiment is arranged on the rotation adjusting part 5 through the bracket 8, so that the detection mechanism has a certain height, and is beneficial to acquiring complete light beams.

In some embodiments, referring to fig. 1, the detection mechanism further comprises: a display. The display is connected to the detector body.

The display of the embodiment comprises any device with a display screen, such as a computer display, a notebook computer display or a tablet computer display, and the like, and can display images. The setting can make operating personnel audio-visual acquisition light beam image so, is favorable to improving detection efficiency.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model. The foregoing is merely a preferred embodiment of the present application and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the present application.

Claims

1. A light beam detection apparatus, comprising:

the detection mechanism comprises a collimator (1) and a detector body (2); the collimator (1) (1) comprises a receiving end and an output end; the receiving end is used for receiving the light beam (9); the detector body (2) is connected to the output end of the collimator (1);

an adjusting mechanism comprising a first adjusting part (3), a second adjusting part (4) and a rotation adjusting part (5); the second adjusting part (4) is arranged on the first adjusting part (3), and the second adjusting part (4) can move along a first direction on the first adjusting part (3); the rotation adjusting part (5) is arranged on the second adjusting part (4), and the rotation adjusting part (5) can move on the second adjusting part (4) along a second direction; the detection mechanism is arranged on the rotation adjusting part (5), and the detection mechanism can rotate on the rotation adjusting part (5).

2. The light beam detection device according to claim 1, characterized in that the collimator (1) comprises:

a cylindrical shell; the two ends of the shell are respectively the receiving end and the output end;

an objective lens group (6) and a reticle (7), the objective lens group (6) and the reticle (7) being located in the housing; the objective lens group (6) is close to the receiving end; the reticle (7) is close to the output end; the light beam (9) received by the receiving end can be imaged on the reticle (7) after passing through the objective lens group (6); the reticle (7) is connected to the detector body (2) through a photoelectric converter.

3. The light beam detection device according to claim 2, characterized in that the collimator (1) further comprises:

and the laser display card is positioned at the receiving end of the collimator (1).

4. The light beam detection device according to claim 2, characterized in that the collimator (1) further comprises:

an attenuation sheet arranged in the collimator (1); the attenuation piece is positioned on one side of the objective lens group (6) close to the receiving end.

5. The light beam detection device according to claim 2, characterized in that the collimator (1) further comprises:

the narrow-band filter is arranged in the collimator (1); the narrow band filter is positioned on one side of the objective lens group (6) close to the receiving end.

6. The light beam detection device according to claim 1, wherein the first adjustment portion (3) includes:

a first base (31) including a first bottom plate and a pair of first support plates; the pair of first support plates are oppositely arranged on two sides of the first bottom plate;

at least one first guide bar (32) which is erected between the pair of first support plates in parallel with each other; the second adjusting part (4) is slidably arranged on the first guide rod (32);

a first lead screw (33), the first lead screw (33) being connected between the second adjusting portion (4) and the first support plate, and the first lead screw (33) being parallel to the first guide rod (32); the second adjusting part (4) can be driven to slide on the first guide rod (32) by rotating the first lead screw (33).

7. The light beam detection device according to claim 1, wherein the second adjusting portion (4) includes:

a second base (41) provided on the first adjustment unit (3); the second base (41) includes a second bottom plate and a pair of second support plates; the pair of second supporting plates are oppositely arranged at two sides of the second bottom plate;

at least one second guide bar (42) which is erected between the pair of second support plates in parallel with each other; the rotation adjusting part (5) is slidably arranged on the second guide rod (42);

a second screw (43), the second screw (43) being connected between the rotation adjustment section (5) and the second support plate, and the second screw (43) being parallel to the second guide rod (42); the second lead screw (43) is rotated to drive the rotation adjusting part (5) to slide on the second guide rod (42).

8. The light beam detection device according to claim 1, wherein the rotation adjustment section (5) includes:

a third base (51) provided on the second adjustment unit (4);

a turntable (52) rotatably arranged on the third base (51); the rotary table (52) is provided with scale marks;

the detection mechanism is arranged on the rotary table (52) and synchronously rotates along with the rotary table (52).

9. The beam detection apparatus according to claim 1, wherein the detection mechanism further comprises: a bracket (8); the detection mechanism is arranged on the rotation adjusting part (5) through the bracket (8).

10. The beam detection apparatus according to claim 1, wherein the detection mechanism further comprises:

and the display is connected to the detector body (2).