CN207081840U - Rain sensor - Google Patents
Rain sensor Download PDFInfo
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- CN207081840U CN207081840U CN201720992500.7U CN201720992500U CN207081840U CN 207081840 U CN207081840 U CN 207081840U CN 201720992500 U CN201720992500 U CN 201720992500U CN 207081840 U CN207081840 U CN 207081840U
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Abstract
A kind of rain sensor is the utility model is related to, light transmitting tube lights, and the rainfall being made up of diversing lens launches optical lens group and reaches the formation total reflection of windshield inner surface, then converges to central ray reception pipe via the receiving lens at center.The structure design of every diversing lens makes diversing lens form total reflection and refraction to light, so that more light are formed in windshield inner surface and are totally reflected, then received by center reception pipe, and the design of receiving lens is that more total reflection light are converged into center reception pipe, so as to increase to the sensitive region area of raindrop, cost is reduced, and then accurate judgement rainfall size adjusts rain brush speed so as to open and close rain brush.
Description
Technical field
Controller of vehicle technical field is the utility model is related to, more particularly to a kind of rain sensor.
Background technology
Existing rain sensor mainly launches infrared light by infrared LED, and transmitted light propagates part in front
Whether wind glass outer surface reflects, so as to being received by photodiode, judge to rain outside car with this and the intensity of rainfall, big
It is small, so as to open and close rain brush work, regulations speed.After thering are raindrop to drop to front windshield, because a part of light can pass through
Raindrop reflect away, and the signal for causing photodiode to be collected into changes, and optical efficiency is not high, raindrop induction area compared with
It is small, can not accurate judgement car external environment rainfall situation, so as to cause maloperation.
Utility model content
The technical problems to be solved in the utility model is：In order to solve the raindrop induction area of existing rain sensor compared with
Small, optical efficiency is not high, can not accurate judgement car external environment rainfall situation, so as to cause the problem of maloperation, the utility model
A kind of rain sensor is provided.
Technical scheme is used by the utility model solves its technical problem：A kind of rain sensor, installed in vehicle
Windshield inner surface, including light transmitting tube, optical lens group and light receiver pipe, it is saturating that the optical lens group includes transmitting
Mirror and receiving lens, the diversing lens launch light into receiving lens after total reflection and refraction are formed to light, saturating by receiving
For mirror by light collection to light receiver pipe, of the present utility model design makes being formed to light for diversing lens be totally reflected and roll over
Penetrate, so that more light are formed in windshield inner surface and are totally reflected, then received by center reception pipe, and connect
The design for receiving lens is that more total reflection light are converged into center reception pipe, so as to increase to the sensitive area surface of raindrop
Product.
The optical lens group includes some diversing lens, and every diversing lens are correspondingly arranged a light transmitting tube,
Around the receiving lens, circumferentially array is uniformly distributed all diversing lens, and receiving lens are located at circumference array center,
Light receiver pipe is located on the central axis of circumference array.The design of diversing lens circumference array and receiving lens will be more complete
Reflection and refracted light converge to light receiver pipe, and so as to increase to the sensitive region area of raindrop, raindrop sensing is substantially improved
Area, improve the accuracy of rain sensor.
Preferably, the optical lens group includes six diversing lens.
Further, occur to be totally reflected and the concrete structure of refraction is：The upper surface of the diversing lens is plane, lower surface
With groove, groove includes left side wall, right side wall, madial wall and lateral wall, and left side wall and right side wall are oppositely arranged, madial wall and
Lateral wall is oppositely arranged, and the outside side wall evagination of one side of madial wall towards lateral wall has a circular arc convex portion, and lateral wall is towards madial wall
One side be in indent arc surface.
It is refraction to light on the arc surface of the circular arc convex portion.
It is total reflection to light on the arc surface of the indent.
In order to converge more light, the upper surface of the receiving lens is plane, and lower surface has inner fovea part.
Circle where the circular arc of the circular arc convex portion is circle A, and the circle where the circular arc of the arc surface of indent is circle B, circle A and
The circle B center of circle on the same line, and circle B relative to circle A closer to receiving lens.In order to more converge to light receiver pipe,
The area of receiving lens total reflection is more than refraction area.
The light transmitting tube is LED light emitting diodes.
There is gel, light is after diversing lens and gel in windshield between the diversing lens and windshield
Inner surface is totally reflected.
Have in order to which rain sensor is fixed on into windscreen surface, between the optical lens group and windshield solidifying
Glue, light are totally reflected after optical lens group and gel in windshield inner surface.
The beneficial effects of the utility model are that rain sensor of the present utility model, light transmitting tube lights, and pass through transmitting
The rainfall transmitting optical lens group of lens composition reaches windshield inner surface and forms total reflection, then the receiving lens via center
Converge to central ray reception pipe.The structure design of every diversing lens makes diversing lens form total reflection and refraction to light,
So that more light are formed in windshield inner surface and are totally reflected, then received, and receive by center reception pipe
The design of lens is that more total reflection light are converged into center reception pipe, so as to increase to the sensitive area surface of raindrop
Product, cost is reduced, and then accurate judgement rainfall size adjusts rain brush speed so as to open and close rain brush.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the three-dimensional structural representation of optical lens group upper surface of the present utility model.
Fig. 2 is the three-dimensional structural representation of optical lens group lower surface of the present utility model.
Fig. 3 is rain sensor optical schematic diagram of the present utility model.
In figure：1st, light transmitting tube, 1-1, light, 2, light receiver pipe, 3, diversing lens, 31, groove, 311, inner side
Wall, 3111, circular arc convex portion, 312, lateral wall, 3121, the arc surface of indent, 4, receiving lens, 41, inner fovea part, 5, keep out the wind glass
Glass, 6, gel.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
As Figure 1-3, a kind of rain sensor of the present utility model, installed in the inner surface of vehicle windscreen 5, including
Light transmitting tube 1, optical lens group and light receiver pipe 2, optical lens group include diversing lens 3 and receiving lens 4, and transmitting is saturating
After mirror 3 forms total reflection and refraction to light 1-1, light 1-1 is injected into receiving lens 4, converged light 1-1 by receiving lens 4
Gather on light receiver pipe 2.Light transmitting tube 1 is LED light emitting diodes.Light receiver pipe 2 is photodiode.Photosensitive two pole
Pipe converts optical signals to electric signal.Certainly, light receiver pipe 2 can also be other electrooptical devices.
Optical lens group includes some diversing lens 3, and every diversing lens 3 are correspondingly arranged a light transmitting tube 1, institute
Having diversing lens 3, circumferentially array is uniformly distributed around receiving lens 4, and receiving lens 4 are located at circumference array center, light
Reception pipe 2 is located on the central axis of circumference array.The upper surface of diversing lens 3 is plane, and lower surface has groove 31, groove
31 include left side wall, right side wall, madial wall 311 and lateral wall 312, and left side wall and right side wall are oppositely arranged, madial wall 311 and outer
Side wall 312 is oppositely arranged, and the outside evagination of side wall 312 of one side of madial wall 311 towards lateral wall 312 has circular arc convex portion 3111, outside
Side wall 312 towards madial wall 311 one side be in indent arc surface 3121.To light 1-1 on the arc surface of circular arc convex portion 3111
For refraction.It is total reflection to light 1-1 on the arc surface 3121 of indent.Circle where the circular arc of circular arc convex portion 3111 is circle A, interior
Circle where the circular arc of recessed arc surface 3121 be circle B, circle A and circle the B center of circle on the same line, and circle B relative to circle A more
Close to receiving lens 4.The upper surface of receiving lens 4 is plane, and lower surface has inner fovea part 41, and inner fovea part 41 is in the song of indent
Face.
In the present embodiment, optical lens group includes six diversing lens 3.
In order to which rain sensor is fixed on into the surface of windshield 5, have between optical lens group upper surface and windshield 5
There is gel 6, light 1-1 is totally reflected after optical lens group and gel 6 in the inner surface of windshield 5.Rain sensor
Optical module is made by the material that can only pass through infrared ray.
Wherein, six light transmitting tubes 1 are luminous, form refraction with being reached after total reflection by six diversing lens 3 respectively
The inner surface of windshield 5 re-forms total reflection, then converges to central ray reception pipe 2 via the receiving lens 4 at center.Six hairs
It is identical to penetrate the structure of lens 3, surrounds circumference array.The design of every structure of diversing lens 3 makes more light 1-1 in windshield
5 inner surfaces form total reflection and received by light receiver pipe 2, and the design of the circumference array of diversing lens 3 and receiving lens 4 as will
More total reflection light 1-1 converge to light receiver pipe 2, and so as to increase to the sensitive region area of raindrop, rain is substantially improved
Induction area is dripped, improves the accuracy of rain sensor.
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people
Member can carry out various changes and amendments in the range of without departing from this item utility model technological thought completely.This item is real
The content being not limited to new technical scope on specification, it is necessary to which its technology is determined according to right
Property scope.
Claims (10)
- A kind of 1. rain sensor, installed in vehicle windscreen（5）Inner surface, it is characterised in that：Including light transmitting tube （1）, optical lens group and light receiver pipe（2）, the optical lens group includes diversing lens（3）And receiving lens（4）, it is described Diversing lens（3）To light（1-1）By light after forming total reflection and reflecting（1-1）Inject receiving lens（4）, by receiving lens （4）By light（1-1）Converge to light receiver pipe（2）On.
- 2. rain sensor as claimed in claim 1, it is characterised in that：The optical lens group includes some diversing lens （3）, every diversing lens（3）It is correspondingly arranged a light transmitting tube（1）, all diversing lens（3）Around the receiving lens （4）Circumferentially array is uniformly distributed, receiving lens（4）Positioned at circumference array center, light receiver pipe（2）Positioned at Circle-Array On the central axis of row.
- 3. rain sensor as claimed in claim 2, it is characterised in that：The optical lens group includes six diversing lens （3）.
- 4. rain sensor as claimed in claim 2, it is characterised in that：The diversing lens（3）Upper surface be plane, under Surface has groove（31）, groove（31）Including left side wall, right side wall, madial wall（311）And lateral wall（312）, left side wall and Right side wall is oppositely arranged, madial wall（311）And lateral wall（312）It is oppositely arranged, madial wall（311）Towards lateral wall（312）'s Simultaneously outside side wall（312）Evagination has circular arc convex portion（3111）, lateral wall（312）Towards madial wall（311）One side be in indent Arc surface（3121）.
- 5. rain sensor as claimed in claim 4, it is characterised in that：The circular arc convex portion（3111）Arc surface on to light Line（1-1）For refraction.
- 6. rain sensor as claimed in claim 4, it is characterised in that：The arc surface of the indent（3121）On to light （1-1）For total reflection.
- 7. rain sensor as claimed in claim 2, it is characterised in that：The receiving lens（4）Upper surface be plane, under Surface has inner fovea part（41）.
- 8. rain sensor as claimed in claim 4, it is characterised in that：The circular arc convex portion（3111）Circular arc where circle For circle A, the arc surface of indent（3121）Circular arc where circle be circle B, circle A and circle B the center of circle on the same line, and circle B Relative to circle A closer to receiving lens（4）.
- 9. rain sensor as claimed in claim 1, it is characterised in that：The light transmitting tube（1）For LED light-emitting diodes Pipe.
- 10. rain sensor as claimed in claim 1, it is characterised in that：The optical lens group and windshield（5）Between With gel（6）, light（1-1）By optical lens group and gel（6）Afterwards in windshield（5）Inner surface is totally reflected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992500.7U CN207081840U (en) | 2017-08-09 | 2017-08-09 | Rain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992500.7U CN207081840U (en) | 2017-08-09 | 2017-08-09 | Rain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207081840U true CN207081840U (en) | 2018-03-09 |
Family
ID=61419487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720992500.7U Active CN207081840U (en) | 2017-08-09 | 2017-08-09 | Rain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207081840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272086A (en) * | 2017-08-09 | 2017-10-20 | 江苏日盈电子股份有限公司 | Rain sensor |
-
2017
- 2017-08-09 CN CN201720992500.7U patent/CN207081840U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272086A (en) * | 2017-08-09 | 2017-10-20 | 江苏日盈电子股份有限公司 | Rain sensor |
| CN107272086B (en) * | 2017-08-09 | 2023-09-12 | 江苏日盈电子股份有限公司 | Rainfall sensor |
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