CN115825922A - Optical sensing structure and laser radar - Google Patents

Abstract

The embodiment of the application discloses an optical sensing structure and a laser radar. The optical sensing structure comprises a photoelectric switch, a first structure part, a second structure part and a light blocking piece, wherein the first structure part is provided with a containing groove, and the photoelectric switch is arranged in the containing groove; the second structure part is arranged at the opening of the containing groove to cover the photoelectric switch in the containing groove, and a gap communicated with the containing groove is formed between the second structure part and the first structure part; the light blocking piece is arranged corresponding to the gap and used for blocking light rays entering the accommodating groove through the gap. This application sets up photoelectric switch in first structure portion and second structure portion, and accessible first structure portion and second structure portion stop outside light to get into the storage tank in, reduce the influence of miscellaneous light to photoelectric switch testing result, promote photoelectric switch's detection accuracy. And the light blocking piece is additionally arranged at the gap between the first structure part and the second structure part, so that light rays entering the accommodating groove through the gap can be further blocked by the light blocking piece, and the detection precision of the photoelectric switch is improved.

Description

Optical sensing structure and laser radar

Technical Field

The application relates to the technical field of laser detection, in particular to an optical sensing structure and a laser radar.

Background

The photoelectric sensing structure detects information of the detected object through an optical signal. For example, the photoelectric switch in the photoelectric sensing structure utilizes the light shielding or reflection of the object to be detected to determine whether the object is present. Because the photoelectric sensing structure can not cause the damage of being detected the thing when detecting being detected, consequently obtain extensive application, however, photoelectric sensing structure is comparatively sensitive to the light, and photoelectric sensing structure among the correlation technique receives the interference of outside veiling glare easily, and detection precision needs to be promoted.

Disclosure of Invention

The application provides an optical sensing structure and a laser radar, which are used for solving the problem that a photoelectric sensing structure in the related technology is easily interfered by external stray light, and the detection precision is to be improved.

In a first aspect, the present application provides an optical sensing structure comprising:

a first structure part provided with a containing groove;

the photoelectric switch is arranged in the accommodating groove;

the second structure part is arranged at the opening of the accommodating groove to cover the photoelectric switch in the accommodating groove, and a gap communicated with the accommodating groove is formed between the second structure part and the first structure part;

and the light blocking piece is arranged corresponding to the gap and is used for blocking the light rays entering the accommodating groove through the gap.

In a second aspect, the present application provides a lidar comprising:

the optical sensing structure described above;

the laser emission component is used for emitting laser signals to a shot object;

the laser receiving assembly is used for receiving echo laser signals reflected by a shot object; the laser emitting assembly and the laser receiving assembly are connected with the first structure portion, or the laser emitting assembly and the laser receiving assembly are connected with the second structure portion.

The application discloses optical sensing structure and laser radar sets up photoelectric switch in first structure portion and second structure portion, and accessible first structure portion and second structure portion stop outside light and get into the storage tank in, reduce the influence of miscellaneous light to photoelectric switch testing result, promote photoelectric switch's detection accuracy. And the light blocking piece is additionally arranged at the gap between the first structure part and the second structure part, so that light rays entering the accommodating groove through the gap can be further blocked by the light blocking piece, and the detection precision of the photoelectric switch is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of a first optical sensing structure provided by an embodiment of the present application;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is a perspective view of a second optical sensing structure provided by an embodiment of the present application;

FIG. 5 is a partial cross-sectional view of a third optical sensing arrangement provided by embodiments of the present application;

FIG. 6 is a partial cross-sectional view of a fourth optical sensing arrangement provided by embodiments of the present application;

FIG. 7 is a partial cross-sectional view of a fifth optical sensing structure provided by an embodiment of the present application;

FIG. 8 is a partial cross-sectional view of a sixth optical sensing structure provided by an embodiment of the present application;

FIG. 9 is a partial cross-sectional view of a seventh optical sensing structure provided by an embodiment of the present application;

FIG. 10 is a perspective cross-sectional view of an eighth optical sensing arrangement provided by embodiments of the present application;

FIG. 11 is an exploded view of the optical sensing structure shown in FIG. 10;

fig. 12 is a perspective view of a ninth optical sensing structure provided in the embodiments of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the claims that follow.

The present embodiment provides an optical sensing structure 100. Referring to fig. 1, the optical sensing structure 100 includes a photoelectric switch 110, and the photoelectric switch 110 determines whether the detected object exists by using the light shielding or reflection of the detected object. For example, the optoelectronic switch 110 may include an emitting portion 111 and a receiving portion 112, the emitting portion 111 may emit light, and the receiving portion 112 may determine whether the detected object exists on the transmission path of the light according to information such as whether the light is received, a time difference between the received light and the emitted light, and the like.

The photoelectric switch 110 is sensitive to light, and if external stray light enters the photoelectric switch 110, the detection result of the photoelectric switch 110 is easily affected. For example, the wavelength range of the received spectrum of the photoelectric switch 110 is approximately between 700nm and 1200nm, and since sunlight contains the spectrum, when the sunlight enters the photoelectric switch 110, the signal of the photoelectric switch 110 is interfered, so that a "false zero" phenomenon occurs, and the quality of the point cloud is affected. In order to avoid the external stray light from interfering with the detection result of the optoelectronic switch 110, the optical sensing structure 100 of the embodiment of the application may further include a first structure portion 120 and a second structure portion 130, the first structure portion 120 has a receiving cavity 121, the optoelectronic switch 110 may be disposed in the receiving cavity 121, and the second structure portion 130 may be disposed at the opening 122 of the receiving cavity 121 to shield the optoelectronic switch 110 in the receiving cavity 121. The first structure portion 120 and the second structure portion 130 are designed to block external stray light from entering the optoelectronic switch 110 in the receiving groove 121, so as to improve the detection accuracy of the optoelectronic switch 110.

The connection manner between the first structure portion 120 and the second structure portion 130 may be clamping, overlapping, gluing, rotating, and the like, which is not limited in the embodiments of the present application. The first structure portion 120 and the second structure portion 130 may have a gap 123 communicating with the accommodating groove 121 due to insufficient connection or a requirement for relative movement, and the like, and the stray light may enter the accommodating groove 121 through the gap 123 and reach the optoelectronic switch 110 in the accommodating groove 121, when the stray light enters the gap 123 at a certain specific angle, the reflection frequency of the light is small, the intensity of the optical signal is high, and if the light reaches the optoelectronic switch 110, the high level signal of the optoelectronic switch 110 directly falls below the threshold value, and the detection result of the optoelectronic switch 110 is affected. Therefore, the optical sensing structure 100 of the embodiment of the present application may further include a light blocking member 140 disposed corresponding to the gap 123, so as to block the light entering the accommodating groove 121 through the gap 123 and/or increase the number of times of light reflection through the light blocking member 140, thereby achieving the effect of weak light intensity, so that the high level signal of the photoelectric switch 110 is always kept above the threshold, and the detection accuracy of the photoelectric switch 110 is improved.

Referring to fig. 2, the light blocking member 140 corresponding to the gap 123 may be: the light blocking member 140 is disposed at least one of a portion of the first structure portion 120 corresponding to the gap 123, a portion of the second structure portion 130 corresponding to the gap 123, and an area of the accommodating groove 121 corresponding to the gap 123. Since the gap 123 is formed between the first structure portion 120 and the second structure portion 130, when the light blocking member 140 is disposed on the first structure portion 120 and/or the second structure portion 130, the light blocking member 140 can be more accurately positioned on the first structure portion 120 and/or the second structure portion 130, and the light blocking effect is better. When the light-blocking member 140 is disposed in the accommodating groove 121, the space of the accommodating groove 121 is larger than the space of the gap 123, so that the size of the light-blocking member 140 disposed in the accommodating groove 121 can be designed to be larger, and the assembly is more convenient.

Alternatively, when the light blocking member 140 is disposed at a position of the first structure portion 120 corresponding to the gap 123, the light blocking member 140 may include a first protrusion 141, and the first protrusion 141 may be connected to the first wall surface 124 of the first structure portion 120 forming the gap 123. Referring to fig. 4, the first protrusion 141 may extend in a direction of an edge line of the opening 122. By arranging the first protrusion 141 on the first wall surface 124 of the first structure portion 120, after external stray light enters the gap 123, at least part of light is reflected by the first protrusion 141 and exits the gap 123 in a direction away from the accommodating cavity 121, so that the intensity of the stray light is reduced, and even if the light reflected by the first protrusion 141 enters the accommodating cavity 121, the light intensity can be reduced due to multiple reflections of the light by the first protrusion 141, so that the influence of the stray light on the photoelectric switch 110 is reduced.

In an exemplary aspect, the first protrusion 141 may be provided in a full circle in a direction of an edge line of the opening 122. In this way, the first convex portion 141 can provide a shielding effect for stray light incident from different portions of the gap 123, thereby ensuring the detection accuracy of the photoelectric switch 110. In still another exemplary aspect, the first protrusion 141 may be disposed only at a portion of the first structure portion 120 near the photoelectric switch 110. Thus, the size of the first protrusion 141 can be reduced, and the manufacturing cost of the photoelectric sensing structure can be reduced.

Alternatively, referring to fig. 2 again, the light blocking member 140 may include a plurality of first protrusions 141 distributed at intervals along the first direction x, and the plurality of first protrusions 141 are all connected to the first wall surface 124 of the first structure portion 120; the first direction x may be from one end of the gap 123 communicating with the accommodating groove 121 to one end of the gap 123 far away from the accommodating groove 121. By providing the plurality of first protrusions 141, a portion of stray light can be reflected by one of the first protrusions 141 and emitted out of the gap 123 in a direction away from the accommodating cavity 121, and the remaining light not reflected by the first protrusion 141 can be reflected by the other first protrusions 141 and emitted out of the gap 123 in a direction away from the accommodating cavity 121, so as to reduce the intensity of light entering the accommodating cavity 121 through the gap 123, and further improve the detection accuracy of the photoelectric switch 110.

When the light blocking member 140 includes a plurality of first protrusions 141, all of the first protrusions 141 may be disposed in a full circle in the edge line direction of the opening 122. When the light blocking member 140 includes a plurality of first protruding portions 141, all of the first protruding portions 141 may be uniformly disposed at a portion of the first structure portion 120 close to the photoelectric switch 110. When the light blocking member 140 includes a plurality of first protrusions 141, among all the first protrusions 141, a portion of the first protrusions 141 may be disposed along the edge line of the opening 122, and a portion of the first protrusions 141 may be disposed at a position of the first structure portion 120 close to the photoelectric switch 110. The first protrusion 141 has a diversified structural design and can be flexibly adjusted according to actual conditions.

Alternatively, when a part of the first protrusion 141 is disposed along the edge line of the opening 122 in a complete circle, and a part of the first protrusion 141 is disposed at a portion of the first structure portion 120 close to the photoelectric switch 110: of all the first protrusions 141, the first protrusion 141 located at one end of the gap 123 far from the receiving groove 121 may be disposed along the edge line of the opening 122 in a complete circle. That is, of all the first protrusions 141, the outermost first protrusion 141 is arranged along the edge line of the opening 122, so that the first protrusions 141 can shield at least part of the light entering the gap 123 from each part, thereby achieving the effect of reducing the light intensity; since the light intensity is greatly attenuated after passing through the outermost first protrusion 141, the other first protrusions 141 may be selectively designed to be disposed along the edge of the opening 122 in a complete circle or at a position of the first structure portion 120 close to the optoelectronic switch 110, in combination with the precision requirement, and the like, which is not limited in the embodiment of the present application.

Referring to fig. 2 and fig. 3, fig. 3 is an enlarged view of the structure at B in fig. 2, in the first direction x, the first protrusion 141 has a first surface 1411 away from the bottom wall of the accommodating groove 121, and a distance from the first surface 1411 to the second wall 131 of the second structure portion 130 in the first direction x may gradually decrease. In this way, the first surface 1411 can receive more light entering the gap 123 and reflect the light to exit the gap 123.

The first surface 1411 may be a plane, a curved surface, a bent surface, and the like, which is not limited in the embodiments of the present application. The first protrusion 141 may further have a third surface 1412 close to the bottom wall of the receiving groove 121 along the first direction x, the third surface 1412 may be connected to the first surface 1411, and ends of the third surface 1412 and the first surface 1411 far away from each other may be connected to the first wall surface 124 of the first structure portion 120. The third surface 1412 may be a plane, a curved surface, a bent surface, and the like, which is not limited in this application. Alternatively, the distance between the third surface 1412 and the second wall surface 131 of the second structure portion 130 may gradually increase along the first direction x.

Alternatively, the cross section of the first protrusion 141 along a plane perpendicular to the bottom wall of the receiving groove 121 may include a triangle, a trapezoid, and the like, which is not limited in this embodiment. Preferably, the cross-section of the first protrusion 141 may include a triangle shape. The first protrusion 141 is simple in structural design and convenient to manufacture. For example, the first surface 1411 and the third surface 1412 can both be planar and both form an included angle with the first wall 124.

In an exemplary embodiment, referring to fig. 5, the first protrusion 141 may be directly disposed on the first wall 124 of the first structure portion 120, and integrally protrudes from the first wall 124, so as to enhance the light blocking effect of the first protrusion 141. In another exemplary scheme, referring to fig. 2 to 4, a mounting groove may be disposed on the first wall surface 124, the first protrusion 141 may be disposed in the mounting groove, and an end of the first protrusion 141 away from a bottom wall of the mounting groove may be flush with the first wall surface 124 or protrude outward from the first wall surface 124. Thus, the first structure portion 120 can be miniaturized and the stray light can be attenuated at the same time.

Referring to fig. 2 again, when the light blocking member 140 is disposed at a position of the second structure portion 130 corresponding to the gap 123, optionally, the light blocking member 140 may include a second protrusion 142, and the second protrusion 142 may be connected to the second wall surface 131 of the second structure portion 130 forming the gap 123. Referring to fig. 4, the second protrusion 142 may extend along the edge line of the opening 122. By arranging the second protrusion 142 on the second wall surface 131 of the second structure portion 130, after the external parasitic light enters the gap 123, at least part of the light is reflected by the second protrusion 142 and exits the gap 123 towards the direction away from the accommodating cavity 121, so as to reduce the intensity of the parasitic light, and even if the light reflected by the second protrusion 142 enters the accommodating cavity 121, the light intensity can be reduced due to multiple reflections of the light by the second protrusion 142, so as to reduce the influence of the parasitic light on the photoelectric switch 110.

In an exemplary aspect, the second protrusion 142 may be disposed along an edge line of the opening 122 in a complete circle. In this way, the second convex portion 142 can provide a shielding effect for stray light incident from different portions of the gap 123, thereby ensuring the detection accuracy of the photoelectric switch 110. In still another exemplary aspect, the second protrusion 142 may be disposed only at a portion of the second structure portion 130 near the photoelectric switch 110. Thus, the size of the second protrusion 142 can be reduced, and the manufacturing cost of the photoelectric sensing structure can be reduced.

Optionally, referring to fig. 2 again, the light blocking member 140 may include a plurality of second protrusions 142 distributed at intervals along the first direction x, and the plurality of second protrusions 142 are all connected to the second wall 131 of the second structure portion 130; the first direction x may be from one end of the gap 123 communicating with the accommodating groove 121 to one end of the gap 123 far away from the accommodating groove 121. By providing the plurality of second protrusions 142, a portion of stray light can be reflected by one of the second protrusions 142 and exit the gap 123 in a direction away from the accommodating cavity 121, and the remaining light not reflected by the second protrusion 142 can be reflected by the other second protrusions 142 and exit the gap 123 in a direction away from the accommodating cavity 121, so as to reduce the intensity of light entering the accommodating cavity 121 through the gap 123, and further improve the detection accuracy of the photoelectric switch 110.

When the light blocking member 140 includes a plurality of second protrusions 142, all of the second protrusions 142 may be disposed along the edge line of the opening 122 in a complete circle. When the light blocking member 140 includes a plurality of second protrusions 142, all of the second protrusions 142 may also be disposed at a portion of the second structure portion 130 close to the photoelectric switch 110. When the light blocking member 140 includes a plurality of second protrusions 142, among all the second protrusions 142, a part of the second protrusions 142 may be disposed along the edge of the opening 122, and a part of the second protrusions 142 is disposed at a position of the second structure portion 130 close to the photoelectric switch 110. The structural design of the second protrusion 142 is diversified, and the adjustment can be flexibly performed according to actual conditions.

Alternatively, when part of the second protrusion 142 is disposed along the edge line of the opening 122 in a complete circle, and part of the second protrusion 142 is disposed at a portion of the second structure portion 130 close to the photoelectric switch 110: of all the second protrusions 142, the second protrusion 142 located at one end of the gap 123 far from the accommodating groove 121 may be disposed along the edge line of the opening 122 in a complete circle. That is, of all the second protrusions 142, the second protrusion 142 located at the outermost side is arranged along the edge line of the opening 122 in a complete circle, so that the second protrusions 142 can shield at least part of the light entering the gap 123 from each part, thereby achieving the effect of reducing the light intensity; since the light intensity is greatly attenuated after passing through the outermost second protrusion 142, the other second protrusions 142 may be selectively designed to be disposed along the edge of the opening 122 in a complete circle or at a position of the second structure portion 130 close to the optoelectronic switch 110, in combination with the precision requirement, which is not limited in the embodiment of the present application.

Referring to fig. 2 and fig. 3, in the first direction x, the second protrusion 142 has a second surface 1421 away from the bottom wall of the accommodating groove 121, and a distance from the second surface 1421 to the first wall surface 124 of the first structure portion 120 in the first direction x may gradually decrease. In this way, the second surface 1421 can receive more light entering the gap 123 and reflect the light to exit the gap 123.

The second surface 1421 may be a plane, a curved surface, a bent surface, and the like, which is not limited in the embodiments of the present application. The second protrusion 142 may further have a fourth surface 1422 close to the bottom wall of the receiving groove 121 along the first direction x, the fourth surface 1422 may be connected to the second surface 1421, and ends of the fourth surface 1422 and the second surface 1421 far away from each other may be connected to the second wall surface 131 of the first structure portion 120. The fourth surface 1422 may be a plane, a curved surface, a bent surface, and the like, which is not limited in this embodiment. Alternatively, the distance from the fourth surface 1422 to the first wall surface 124 of the first structure portion 120 may gradually increase along the first direction x.

Alternatively, the cross section of the second protrusion 142 may include a triangle, a trapezoid, and the like in a plane perpendicular to the bottom wall of the receiving groove 121, which is not limited in the embodiment of the present application. Preferably, the cross-section of the second protrusion 142 may include a triangle shape. The second protrusion 142 is simple in structural design and convenient to manufacture. For example, the second surface 1421 and the fourth surface 1422 can be both planar and both form an included angle with the second wall 131.

In an exemplary embodiment, referring to fig. 5, the second protrusion 142 may be directly disposed on the second wall 131 of the second structure portion 130, and integrally protrudes from the second wall 131, so as to enhance the light blocking effect of the second protrusion 142. In another exemplary scheme, referring to fig. 2 to 4, a mounting groove may be disposed on the second wall surface 131, the second protrusion 142 may be disposed in the mounting groove, and an end of the second protrusion 142 away from the bottom wall of the mounting groove may be flush with the second wall surface 131 or protrude outward from the second wall surface 131. Thus, the second structure 130 can be miniaturized and stray light can be attenuated at the same time.

Alternatively, when the light blocking member 140 includes the first protrusion 141 and the second protrusion 142, the first protrusion 141 and the second protrusion 142 may be disposed in a staggered manner along the first direction x. The first convex portion 141 and the second convex portion 142 are arranged in a staggered manner, so that light entering the gap 123 can be reflected by one of the first convex portion 141 and the second convex portion 142 and then at least partially reflected to the other of the first convex portion 141 and the second convex portion 142, thereby increasing the number of times of light reflection and further reducing the light intensity.

Further alternatively, when the light blocking member 140 includes a plurality of first protrusions 141 and a plurality of second protrusions 142, referring to fig. 6, at least one second protrusion 142 may be disposed between every two adjacent first protrusions 141 or at least one first protrusion 141 may be disposed between every two adjacent second protrusions 142 along the first direction x. Preferably, in the first direction x, there is one second convex portion 142 between every two adjacent first convex portions 141. So that when the same number of first and second protrusions 141 and 142 are provided, the number of times of light reflection by the first and second protrusions 141 and 142 may be greater, the light attenuation phenomenon may be more serious, and the influence on the photoelectric switch 110 may be less.

Referring to fig. 2 to 4 again, when the light-blocking member 140 is disposed in the accommodating groove 121, optionally, the light-blocking member 140 may include a light-blocking plate 143, the light-blocking plate 143 may be disposed in the accommodating groove 121 and corresponding to the gap 123, and the light-blocking plate 143 may be connected to the first structure portion 120 or the second structure portion 130.

The light barrier 143 may include a first plate body 1431 and a second plate body 1432 disposed at an included angle, the first plate body 1431 may be disposed adjacent to the first structure portion 120, the second plate body 1432 may be disposed adjacent to the second structure portion 130, the first plate body 1431 may be connected to the first structure portion 120 or the second plate body 1432 may be connected to the second structure portion 130. The first plate body 1431 and the second plate body 1432 are designed to be V-shaped structures, so that the blocking effect on light is better.

The first structure portion 120 may include a bottom plate 125 and a peripheral side plate 126 connected to the bottom plate 125, the bottom plate 125 and the peripheral side plate 126 are enclosed to form an accommodating groove 121, and when the first plate body 1431 is connected to the first structure portion 120, specifically, the first plate body 1431 may be disposed at an included angle with the peripheral side plate 126 of the first structure portion 120 and connected to the peripheral side plate 126. The light blocking plate 143 is connected to the peripheral side plate 126 of the first structure portion 120, and the connection is convenient because the peripheral side plate 126 has a large size. The light blocking plate 143 and the first structure portion 120 may be assembled together by bonding, welding, or the like, and the light blocking plate 143 and the first structure portion 120 may also be an integral structure, which is not limited in the embodiments of the present application. Optionally, the first plate body 1431 may be perpendicular to the peripheral side plate 126 of the first structure portion 120, so that the layout of the optical sensing structure 100 is regular and the effect of blocking stray light is better.

Alternatively, the second structure portion 130 may be substantially plate-shaped, and when the second plate body 1432 is connected to the second structure portion 130, specifically, the second plate body 1432 may be disposed at an angle with the second structure portion 130 and connected to the second structure portion 130. The light blocking plate 143 and the second structure portion 130 may be assembled together by bonding, welding, or the like, and the light blocking plate 143 and the second structure portion 130 may also be of an integral structure, which is not limited in the embodiments of the present application. Optionally, the second plate body 1432 may be perpendicular to the second structure portion 130, so that the layout of the optical sensing structure 100 is regular and the effect of blocking stray light is better.

Optionally, the second structure portion 130 may be at least partially located in the accommodating groove 121, and the second structure portion 130 may also be entirely located on one side of the end surface of the opening 122 of the accommodating groove 121. When at least a portion of the second structure portion 130 is located in the receiving groove 121, the contact area between the second structure portion 130 and the first structure portion 120 can be increased, and the connection reliability between the second structure portion 130 and the first structure portion 120 can be improved; the arrangement of the receiving groove 121 is also convenient for positioning the second structure portion 130 when being connected to the first structure portion 120, and is beneficial to the rapid and accurate assembly of the second structure portion 130 and the first structure portion 120. When the second structure portion 130 is located on the side of the end surface of the opening 122 of the accommodating groove 121, that is, the second structure portion 130 is disposed on the first structure portion 120, the connection between the second structure portion 130 and the first structure portion 120 is simpler.

Please refer to fig. 7 and 8, when the second structure portion 130 is located on a side of the end surface of the opening 122 of the accommodating groove 121, the gap 123 between the second structure portion 130 and the first structure portion 120 may be substantially distributed along a direction parallel to the plate surface of the second structure portion 130. Referring to fig. 2, when the second structure portion 130 is entirely located in the receiving groove 121, the gap 123 between the second structure portion 130 and the first structure portion 120 may be substantially distributed along a direction parallel to the side surface of the second structure portion 130. Referring to fig. 9, when the second structure portion 130 is partially located in the receiving groove 121 and partially located outside the receiving groove 121, the gap 123 between the second structure portion 130 and the first structure portion 120 includes a first gap 1231 approximately distributed along a direction parallel to the plate surface of the second structure portion 130 and a second gap 1232 approximately distributed along a direction parallel to the side surface of the second structure portion 130; in this case, the first protrusion 141 may be provided corresponding to the first gap 1231 or the second gap 1232, and the second protrusion 142 may be provided at the first gap 1231 or the second gap 1232. Preferably, the first protrusion 141 and the second protrusion 142 may be disposed corresponding to the first gap 1231 and/or the second gap 1232 at the same time, so that the first protrusion 141 and the second protrusion 142 may block light and attenuate light better.

The optoelectronic switch 110 may be used for angular displacement measurement, counting, positioning, and the like, and is not limited in this application. Referring to fig. 10 and 11, the optical sensing structure 100 may further include an encoder 150 used with the optoelectronic switch 110, the encoder 150 may be provided with a plurality of detection portions 151 distributed at intervals along the circumferential direction, and the encoder 150 may move relative to the optoelectronic switch 110 so that each detection portion 151 on the encoder 150 may pass through the optoelectronic switch 110 in sequence.

Alternatively, one of the opto-electronic switch 110 and the code wheel 150 may be coupled to the first structural portion 120, the other of the opto-electronic switch 110 and the code wheel 150 may be coupled to the second structural portion 130, and the second structural portion 130 may be rotatable relative to the first structural portion 120 to effect movement of the code wheel 150 relative to the opto-electronic switch 110. Specifically, the second structure portion 130 is rotatable relative to the first structure portion 120 about a second direction y, the second direction y may be parallel to the extending direction of the receiving slot 121, and the plurality of detecting portions 151 on the code wheel 150 may be distributed at intervals about the second direction y, so that when the second structure portion 130 rotates relative to the first structure portion 120 about the second direction y, the detecting portions 151 on the code wheel 150 may sequentially pass through the optoelectronic switch 110.

Alternatively, the photoelectric switch 110 may include the emitting portion 111 and the receiving portion 112 arranged at intervals, and the respective detecting portions 151 on the code wheel 150 sequentially pass through the photoelectric switch 110, and the respective detecting portions 151 sequentially pass between the emitting portion 111 and the receiving portion 112. When the detecting portions 151 are located between the emitting portion 111 and the receiving portion 112, the light emitted from the emitting portion 111 cannot be received by the receiving portion 112, and when the gap 123 between two adjacent detecting portions 151 corresponds to the emitting portion 111 and the receiving portion 112, the light emitted from the emitting portion 111 can be received by the receiving portion 112 because the light is not blocked by the detecting portion 151, and accordingly, the photoelectric switch 110 can count the number of the detecting portions 151 passing between the emitting portion 111 and the receiving portion 112 on the code wheel 150 in a period of time, and accordingly, the angle of rotation of the code wheel 150 is obtained, and measurement of angular displacement is achieved. For example, when the angle between the line connecting the center of each adjacent two detecting portions 151 on the code wheel 150 to the rotation center of the code wheel 150 is 1 °, if the photoelectric switch 110 counts that the two detecting portions 151 on the code wheel 150 have passed between the transmitting portion 111 and the receiving portion 112 in one minute, the angle through which the code wheel 150 rotates is substantially greater than 1 ° and less than 3 °. By increasing the number of the detecting parts 151 on the code wheel 150, the included angle between two adjacent detecting parts 151 is reduced, and the detection precision of the photoelectric switch 110 can be improved.

Each of the detecting portions 151 on the code wheel 150 may extend in the second direction y, and may also extend in a direction perpendicular to the second direction y. The dimension of the code wheel 150 in the direction perpendicular to the second direction y can be reduced when each detection portion 151 on the code wheel 150 extends in the direction parallel to the second direction y, the dimension of the code wheel 150 in the direction parallel to the second direction y can be reduced when each detection portion 151 on the code wheel 150 extends in the direction perpendicular to the second direction y, and the dimension can be flexibly adjusted in combination with actual requirements during actual production, which is not limited by the embodiment of the present application. Fig. 10 shows a case where the photoelectric switch 110 is connected to the first structure portion 120, the code wheel 150 is connected to the second structure portion 130, and the respective detecting portions 151 on the code wheel 150 extend in the second direction y.

The optical sensing arrangement 100 may further include an actuation portion 160 for actuating movement of the code wheel 150 relative to the opto-electronic switch 110. The driving portion 160 may be located in the accommodating groove 121. The driving part 160 may include a stator 161 and a rotor 162 rotating relative to the stator 161, one of the stator 161 and the rotor 162 may be connected to the code wheel 150, and the other of the stator 161 and the rotor 162 may be connected to the electro-optical switch 110. Alternatively, when the code wheel 150 is connected to one of the first structure portion 120 and the second structure portion 130 and the photoelectric switch 110 is connected to the other of the first structure portion 120 and the second structure portion 130, one of the stator 161 and the rotor 162 may be connected to the first structure portion 120 and the other of the stator 161 and the rotor 162 may be connected to the second structure portion 130. The connection between the stator 161, the rotor 162, the code wheel 150 and the photoelectric switch 110 is converted into the connection between the first structure part 120 and the second structure part 130, and the first structure part 120 and the second structure part 130 are larger in size, so that the assembly is more convenient.

The optical sensing structure 100 may further include a circuit board 170, and the circuit board 170 may be electrically connected to the driving part 160 and the opto-electronic switch 110 to provide electrical signals, control signals, and the like for the driving part 160 and the opto-electronic switch 110. The circuit board 170 may be located in the receiving groove 121. Alternatively, when the first structure part 120 includes the bottom plate 125 and the peripheral side plate 126, a boss 1251 may be provided on a surface of the bottom plate 125 facing the peripheral side plate 126, and the circuit board 170 may be provided on the boss 1251 and spaced apart from the bottom plate 125. Thus, the vibration generated when the driving unit 160 operates can be reduced, and the noise can be reduced.

The optical sensing structure 100 may further include an optical cover 180, and the optical cover 180 may be located on a side of the first structure portion 120 where the second structure portion 130 is located, so as to further achieve the effect of blocking light.

Referring to fig. 12, the first structure portion 120 may have a substantially cylindrical structure, and the optical cover 180 may have a substantially cylindrical structure, and the embodiments of the present disclosure do not limit the structures of the first structure portion 120 and the optical cover 180.

In a second aspect, embodiments of the present application provide a lidar. The lidar may be a mechanical lidar. The laser radar comprises a laser transmitting component, a laser receiving component and the optical sensing structure 100, wherein the laser transmitting component is used for transmitting laser signals to a shot object, the laser receiving component is used for receiving echo laser signals reflected by the shot object, comparing the received echo laser signals with the transmitted laser signals, and obtaining related information of a target after proper processing; for example, information about the distance, orientation, height, speed, attitude, or even shape of the target may be obtained.

The laser emitting assembly and the laser receiving assembly may be both connected to the first structure portion 120, or the laser emitting assembly and the laser receiving assembly may be both connected to the second structure portion 130. When the second structure portion 130 rotates relative to the first structure portion 120, the light emitting path of the laser emitting assembly can be changed, so that the purpose of detecting objects in different areas is achieved. Since one of the second structure portion 130 and the first structure portion 120 is connected to the code wheel 150, and the other of the second structure portion 130 and the first structure portion 120 is connected to the optoelectronic switch 110, the rotation of the second structure portion 130 relative to the first structure portion 120 is synchronized with the rotation of the code wheel 150 relative to the optoelectronic switch 110, based on which the measurement of the rotational displacement of the second structure portion 130 relative to the first structure portion 120 can be obtained through the measurement of the rotational displacement of the code wheel 150 relative to the optoelectronic switch 110, and further the rotational angles of more than one laser emitting assembly and laser receiving assembly installed in the second structure portion 130 and the first structure portion 120 are known, so that the amount of probing of the laser emitting assembly and the laser receiving assembly to a designated area is realized.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims (10)

1. An optical sensing structure, comprising:

a first structure part provided with a containing groove;

the photoelectric switch is arranged in the accommodating groove;

the second structure part is arranged at the opening of the accommodating groove to cover the photoelectric switch in the accommodating groove, and a gap communicated with the accommodating groove is formed between the second structure part and the first structure part;

and the light blocking piece is arranged corresponding to the gap and is used for blocking the light rays entering the accommodating groove through the gap.

2. The optical sensing structure of claim 1, wherein the flag comprises:

a first convex portion having a first wall surface forming the gap, the first convex portion being connected to the first wall surface and extending in a peripheral line direction of the opening; and/or

A second projection having a second wall surface forming the gap, the second projection being connected to the second wall surface and extending in a direction of a peripheral line of the opening; and/or

And the light barrier is positioned in the accommodating groove and corresponds to the gap, and the light barrier is connected with the first structure part or the second structure part and extends along the edge line direction of the opening.

3. The optical sensing structure as claimed in claim 2, wherein if the light blocking member includes the first protrusions, the number of the first protrusions is plural, and the plural first protrusions are spaced apart along a first direction; and/or, if the light blocking member includes the second convex portion, the number of the second convex portion is multiple, and the multiple second convex portions are distributed at intervals along the first direction;

the first direction is from one end of the gap communicated with the containing groove to one end of the gap far away from the containing groove.

4. The optical sensing structure of claim 2, wherein if the light blocking member comprises the first protrusion and the second protrusion, the first protrusion and the second protrusion are staggered along a first direction; the first direction is from one end of the gap communicated with the containing groove to one end of the gap far away from the containing groove.

5. The optical sensing structure as claimed in claim 2, wherein if the light blocking member includes the first protrusion, the first protrusion has a first surface away from the bottom wall of the receiving groove along a first direction, and a distance from the first surface to the second wall surface of the second structure portion along the first direction gradually decreases; and/or, if the light blocking member includes the second protrusion, along a first direction, the second protrusion has a second surface far away from the bottom wall of the accommodating groove, and a distance from the second surface to the first wall surface of the first structure portion along the first direction is gradually reduced;

the first direction is from one end of the gap communicated with the containing groove to one end of the gap far away from the containing groove.

6. The optical sensing structure of claim 2, wherein if the light barrier comprises the light barrier, the light barrier comprises:

the first plate body is positioned in the accommodating groove and arranged corresponding to the gap, and the first plate body and the second structure part are arranged at intervals and connected with the first structure part;

and the second plate body is positioned in the accommodating groove, one end of the second plate body is connected with one end of the first plate body, which is far away from the first structure part, and the other end of the second plate body extends towards the direction close to the second structure part.

7. The optical sensing structure of claim 1, wherein at least a portion of the second structure portion is located in the receiving cavity.

8. The optical sensing structure according to any one of claims 1 to 7, wherein the second structure portion is rotatable with respect to the first structure portion about a second direction, the second direction being parallel to the extending direction of the receiving groove.

9. The optical sensing structure of claim 8, further comprising:

and the coded disc is provided with a plurality of detection parts which are distributed at intervals around the second direction, the coded disc is connected with one of the first structure part and the second structure part, the photoelectric switch is connected with the other one of the first structure part and the second structure part, and when the second structure part rotates around the second direction relative to the first structure part, each detection part on the coded disc can sequentially pass through the photoelectric switch.

10. A lidar, comprising:

an optical sensing structure according to claim 8 or 9;

the laser emission component is used for emitting laser signals to a shot object;

the laser receiving assembly is used for receiving echo laser signals reflected by a shot object; the laser emitting assembly and the laser receiving assembly are connected with the first structure portion, or the laser emitting assembly and the laser receiving assembly are connected with the second structure portion.

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