CN218350527U

CN218350527U - Optical structure of rainfall sensor

Info

Publication number: CN218350527U
Application number: CN202222434447.2U
Authority: CN
Inventors: 李新涛; 王天寅; 刘国栋
Original assignee: Lianchuang Electronic Technology Co ltd
Current assignee: Lianchuang Electronic Technology Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-01-20
Anticipated expiration: 2032-09-14

Abstract

The utility model relates to an optical element technical field, concretely relates to optical structure of rainfall sensor, turn to subassembly, silica gel layer including light emission subassembly, light receiving component, light path, light emission subassembly is used for sending collimated light, collimated light is in proper order through vehicle windshield's a department, light path and turns to subassembly, vehicle windshield's another department, is received by light receiving component at last. The utility model discloses a light emission subassembly sends collimated light, collimated light is in proper order through vehicle windshield's a department, the light path turns to the subassembly, vehicle windshield's another department, at last received by the light receiving component, turn to subassembly control light through the light path and deflect, in the propagation of whole light path, collimated light is twice respectively through vehicle shelves windshield's two positions, with enlarge holistic photosensitive area, realized under the condition that does not enlarge light beam cross sectional area, improve photosensitive area by a wide margin, measuring range is bigger, the rainfall monitoring is more accurate.

Description

Optical structure of rainfall sensor

Technical Field

The utility model relates to an optical element technical field, concretely relates to optical structure of rainfall sensor.

Background

With the continuous development and progress of science and technology, vehicles such as subways, light rails and motor vehicles are provided with automatic windshield wiper systems for automatically detecting rainfall, and the core component of the system is a rainfall sensor.

The optical rainfall sensor senses the size of raindrops by utilizing the total reflection principle, so that the running speed of the windshield wiper is automatically adjusted. In the optical rain sensor, a light source emits a beam of light which passes through a front windshield. When no rainwater exists on the windshield, the light beam is totally reflected on the outer surface of the windshield and reaches the optical sensor at the corresponding position; when raining, the light beam cannot be totally reflected due to rain on the windshield, and the light path deviates, so that the total amount of light received by the sensor changes, and the existence of the rain is detected. The larger the area of the optical sensor that can receive the totally reflected light, the more detailed the information obtained.

The light-sensitive area of the rainfall sensor in the prior art is equivalent to the cross-sectional area of the light beam, the larger the cross-sectional area of the light beam is, the larger the light-sensitive area is, the more accurate the rainfall monitoring is, but the light-sensitive area is limited by the whole size, the more difficult the cross-sectional area of the light beam is to be improved, and the manufacturing cost is also higher, so that the structural design of increasing the light-sensitive area is needed under the condition that the cross-sectional area of the light beam is not enlarged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a rainfall sensor's optical structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an optical structure of rainfall sensor for carry out the rainfall response to vehicle windshield, turn to subassembly, silica gel layer including light emission subassembly, light receiving component, light path, light emission subassembly is used for sending collimation light, collimation light turns to another department of subassembly, vehicle windshield through a vehicle windshield, light path in proper order, is received by light receiving component at last, the light path turns to the subassembly and is used for controlling light to deflect, the silica gel layer is used for fixed light emission subassembly, light receiving component, light path to turn to the subassembly.

Further, the light emitting assembly comprises a light source and an emitting end lens, the light source is used for emitting light, and the emitting end lens is used for collimating the light emitted by the light source to form collimated light.

Further, the transmitting end lens is bonded on the front face of the silica gel layer.

Further, the light emitting assembly is provided with two.

Further, the optical path steering assembly is provided with two.

Further, the light path steering component is formed by adopting a reflecting mirror.

Further, the light receiving assembly comprises a light detector and a receiving end lens, and the receiving end lens is used for converging the collimated light rays onto the light detector.

Further, the receiving end lens is bonded on the front face of the silica gel layer.

Further, the reverse side of silica gel layer bonds on vehicle windshield.

The utility model has the advantages that: it is right by the aforesaid the utility model discloses a description can know, compared with the prior art, the utility model discloses a rainfall sensor's optical structure includes light emission subassembly, light receiving component, the light path turns to the subassembly, the silica gel layer, through the fixed light emission subassembly on silica gel layer, light receiving component, the light path turns to the subassembly, send collimated light through light emission subassembly, collimated light passes through vehicle windshield's a department in proper order, the light path turns to the subassembly, another department of vehicle windshield, receive by light receiving component at last, turn to subassembly control light through the light path and deflect, in the propagation of whole light path, collimated light is twice respectively through vehicle shelves windscreen's two positions, with enlarge holistic photosensitive area, realized under the condition that does not enlarge light beam cross sectional area, improve photosensitive area by a wide margin, measuring range is bigger, rainfall monitoring is more accurate.

Drawings

Fig. 1 is a schematic structural diagram of an optical structure of a rainfall sensor according to a preferred embodiment of the present invention;

fig. 2 is a schematic diagram illustrating the optical path propagation of the optical structure of a rainfall sensor according to a preferred embodiment of the present invention;

reference numerals are as follows: 1. a vehicle windshield; 2. a light emitting assembly; 3. a light receiving member; 4. an optical path turning component; 5. a silica gel layer; 21. a light source; 22. an emission end lens; 31. a light detector; 32. and a receiving end lens.

Detailed Description

The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2 shown, the utility model discloses a preferred embodiment, an optical structure of rainfall sensor for carry out the rainfall response to vehicle windshield 1, turn to subassembly 4, silica gel layer 5 including light emission subassembly 2, light receiving component 3, light path, light emission subassembly 2 is used for sending collimated light, collimated light is in proper order through vehicle windshield 1 one, light path turn to subassembly 4, another department of vehicle windshield 1, is received by light receiving component 3 at last, light path turns to subassembly 4 and is used for controlling light deflection, silica gel layer 5 is used for fixed light emission subassembly 2, light receiving component 3, light path and turns to subassembly 4.

The utility model discloses a rainfall sensor's optical structure includes light emission subassembly 2, light receiving component 3, the light path turns to subassembly 4, silica gel layer 5, through the fixed light emission subassembly 2 in silica gel layer 5, light receiving component 3, the light path turns to subassembly 4, send collimated light through light emission subassembly 2, collimated light passes through vehicle windshield 1's department in proper order, light path turns to subassembly 4, another department of vehicle windshield 1, finally received by light receiving component 3, turn to subassembly 4 control light through the light path and deflect, in the propagation of whole light path, collimated light is twice respectively through vehicle shelves windscreen's two positions, with enlarge holistic photosensitive area, realized under the condition that does not enlarge light beam cross sectional area, improve photosensitive area by a wide margin, measuring range is bigger, rainfall monitoring is more accurate.

As a preferred embodiment of the present invention, it may also have the following additional technical features:

in the present embodiment, the light emitting assembly 2 includes a light source 21 and an emission end lens 22, the light source 21 is used for emitting light, and the emission end lens 22 is used for collimating the light emitted from the light source 21 to form collimated light. The light emitting assembly 2 emits light through the light source 21 and the divergent light is collimated by the emission end lens 22 to form collimated light for detection.

In this embodiment, the emitter lens 22 is bonded to the front surface of the silicone layer 5. The emitter lens 22 is fixed by adhering the emitter lens 22 to the front surface of the silicone rubber layer 5.

In this embodiment, the light emitting element 2 is provided in two, and the optical path deflecting element 4 is provided in two. The light emitting component 2 and the corresponding light path steering component 4 are both provided with two light emitting components, so that the light sensing area is doubled, and the measuring range is enlarged.

In the present embodiment, the optical path turning member 4 is formed using a mirror. The light path steering component 4 made of the transmitting mirror can better turn light rays, and the manufacturing cost is lower.

In this embodiment, the light receiving assembly 3 includes a light detector 31 and a receiving end lens 32, and the receiving end lens 32 is used for converging collimated light rays onto the light detector 31. The collimated light is converged onto the light detector 31 by the receiving end lens 32 for detection by the light detector 31.

In this embodiment, the receiving end lens 32 is adhered to the front surface of the silicone layer 5. The receiving-side lens 32 is fixed by adhering the receiving-side lens 32 to the front surface of the silicone layer 5.

In the present embodiment, the reverse side of the silicone layer 5 is bonded to the vehicle windshield 1. The silica gel layer 5 is bonded on the vehicle windshield 1 more firmly and does not affect the sight of the vehicle windshield 1.

The above additional technical features can be freely combined and used in addition by those skilled in the art without conflict.

It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. An optical structure of a rain sensor for sensing the rain of a vehicle windshield (1), characterized in that: including light emission subassembly (2), light receiving component (3), light path turn to subassembly (4), silica gel layer (5), light emission subassembly (2) are used for sending collimated light, collimated light passes through a department, the light path of vehicle windshield (1) in proper order and turns to another department of subassembly (4), vehicle windshield (1), is received by light receiving component (3) at last, light path turns to subassembly (4) and is used for controlling light and deflects, silica gel layer (5) are used for fixed light emission subassembly (2), light receiving component (3), light path and turn to subassembly (4).

2. An optical structure of a rainfall sensor according to claim 1, wherein: the light emitting component (2) comprises a light source (21) and an emitting end lens (22), wherein the light source (21) is used for emitting light rays, and the emitting end lens (22) is used for collimating the light rays emitted by the light source (21) to form collimated light rays.

3. An optical structure of a rainfall sensor according to claim 2, wherein: the transmitting end lens (22) is bonded on the front surface of the silica gel layer (5).

4. An optical structure of a rainfall sensor according to claim 1, wherein: the light emitting component (2) is provided with two.

5. An optical structure of a rainfall sensor according to claim 1, wherein: the number of the light path steering components (4) is two.

6. An optical structure of a rain sensor according to claim 1, characterized in that: the light path steering component (4) is formed by adopting a reflecting mirror.

7. An optical structure of a rainfall sensor according to claim 1, wherein: the light receiving assembly (3) comprises a light detector (31) and a receiving end lens (32), and the receiving end lens (32) is used for converging collimated light rays onto the light detector (31).

8. An optical structure of a rain sensor according to claim 7, wherein: the receiving end lens (32) is bonded on the front face of the silica gel layer (5).

9. An optical structure of a rain sensor according to claim 1, characterized in that: the reverse side of the silica gel layer (5) is bonded on the vehicle windshield (1).