CN209400722U - A kind of precipitation rain fall sensor - Google Patents
A kind of precipitation rain fall sensor Download PDFInfo
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- CN209400722U CN209400722U CN201821855993.0U CN201821855993U CN209400722U CN 209400722 U CN209400722 U CN 209400722U CN 201821855993 U CN201821855993 U CN 201821855993U CN 209400722 U CN209400722 U CN 209400722U
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Abstract
The utility model provides a kind of precipitation rain fall sensor, and including shell and the intracorporal light transmitting tube of the shell, light-sensitive element and the light emitting end lens and optical receiving end lens being oppositely arranged are arranged in；The top of the shell is mounted on the inner surface of windshield by silicagel pad；The light emitting end lens are used to first part's light that the light transmitting tube issues being emitted to the windshield；The optical receiving end lens are used to receive the second part light that the light emitting end lens are emitted on the windshield and reflect and reflect through windshield, and will be on the second part light focusing to the light-sensitive element that received.After the utility model is by being changed into electric signal for the optical signal on light-sensitive element, then by electric signal power can judge the presence or absence of rainfall and size, to solve the problems such as precipitation rain fall sensor susceptibility is not high, vulnerable to ambient light interference.
Description
Technical field
The utility model relates to the automatic detection field of rainfall, is related specifically to a kind of precipitation rain fall sensor.
Background technique
Currently, many subways and light rail train, do not configure the automatic rain brush system of automatic rainfall detection.Rainy day drives
The driving sight of people, which will receive raindrop, significantly to be influenced, and the safety of burst accident respond and driving is greatly reduced
Property, there is very big security risk for the train run at high speed.Therefore, rainfall detects automatically and automatic wiper seems very heavy
It wants, and existing precipitation rain fall sensor has the problems such as sensitizing range is relatively narrow, susceptibility is not high.
Utility model content
Place in view of the deficiency of the prior art, the utility model provides a kind of precipitation rain fall sensor, to solve
The problems such as precipitation rain fall sensor susceptibility is not high, vulnerable to ambient light interference.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of precipitation rain fall sensor, including shell and setting the intracorporal light transmitting tube of the shell, light-sensitive element, with
And the light emitting end lens and optical receiving end lens being oppositely arranged；
The top of the shell is mounted on the inner surface of windshield by silicagel pad；
The light emitting end lens are used to for first part's light that the light transmitting tube issues to be emitted to described keep out the wind
On glass；
The optical receiving end lens are emitted on the windshield and for receiving the light emitting end lens through keeping out the wind
The second part light of glass-reflected and refraction, and will be on the second part light focusing to the light-sensitive element that received.
Further, the light transmitting tube is the LED light emitting device of angle of divergence very little.
Further, the light emitting end lens include the first prism and are arranged in the of first prism front end
One convex lens,
The reception for first part's light that first convex lens is used to launch the light transmitting tube carries out light
Collimation；
First prism makes for transferring to first part's light after first convex lens collimates
First part's light is emitted on the windshield.
Further, first prism includes that the first transmitting mirror surface, the second transmitting mirror surface and third emit mirror surface, institute
The one end for stating the first transmitting mirror surface and the second transmitting mirror surface is connected at the top of the shell respectively, the second transmitting mirror surface
The other end and the third transmitting mirror surface be connected, be provided between the first transmitting mirror surface and third transmitting mirror surface
First convex lens, wherein the first transmitting mirror surface, the second transmitting mirror surface and third transmitting mirror surface and the housing top surface
Angle be respectively as follows: 22.5 °, 45 °, 45 °.
Further, the optical receiving end lens include the second prism and are arranged in the of second prism front end
Two convex lenses,
Second prism makes institute for transferring to the second part light for reflecting or reflecting through the windshield
Second part light is stated to be emitted on second convex lens；
Second convex lens is used to carry out light focusing to the second part light transferred through second prism, makes institute
It states on second part light focusing to the light-sensitive element.
Further, second prism includes that the first reception mirror surface, the second reception mirror surface and third receive mirror surface, institute
The one end for stating the first reception mirror surface and the second reception mirror surface is connected at the top of the shell respectively, and described second receives mirror surface
The other end and the third receive mirror surface and be connected, the first reception mirror surface and the third are received and are provided between mirror surface
Second convex lens, wherein described first, which receives mirror surface, the second reception mirror surface and third, receives mirror surface and the housing top surface
Angle be respectively as follows: 22.5 °, 45 °, 45 °.
Further, first convex lens, the second convex lens, light transmitting tube and light-sensitive element are arranged in the shell
On internal same straight line, and the distance of center to the case top of first convex lens and the second convex lens is identical.
Further, the shell is prepared by the impermeable material of visible light.
A kind of precipitation rain fall sensor provided by the utility model, first part's light that light transmitting tube is issued are sent out by light
Penetrate end lens be emitted on windshield after, will be emitted on windshield through optical receiving end lens and through windshield reflection and
On the second part light focusing to light-sensitive element of refraction, when windscreen surface does not have raindrop, first part's light occurs
Acquisition second part light is gone back on windshield in total reflection, second part light again through the turnover of optical receiving end lens optical path,
It focuses on light-sensitive element, light-sensitive element can receive stronger optical signal；It is very big by when windscreen surface has raindrop
A part of light can scatter in air, and only a small amount of second part light, which can be reflected, finally converges to light-sensitive element through optical path
On, cause the optical signal of light-sensitive element very weak, therefore, after the optical signal on light-sensitive element is changed into electric signal, then leads to
Cross electric signal power can judge the presence or absence of rainfall and size, come solve precipitation rain fall sensor susceptibility it is not high, vulnerable to environment
The problems such as light interferes.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of precipitation rain fall sensor of the utility model exemplary embodiment；
Fig. 2 is saturating for the light emitting end lens and optical receiving end of a kind of precipitation rain fall sensor of the utility model exemplary embodiment
The structural schematic diagram of mirror；
Fig. 3 is a kind of optical principle emulation in no rain of precipitation rain fall sensor of the utility model exemplary embodiment
Figure；
Fig. 4 is a kind of optical principle emulation in rain of precipitation rain fall sensor of the utility model exemplary embodiment
Figure；
Fig. 5 is a kind of anti-interference analogous diagram of receiving end lens of precipitation rain fall sensor of the utility model exemplary embodiment.
In figure: 1- shell, 2- light transmitting tube, 3- light-sensitive element, 4- light emitting end lens, 5- optical receiving end lens, 6-
Silicagel pad, 7- windshield；
The first prism of 401-, the first convex lens of 402-；
4011- first emits mirror surface, and 4012- second emits mirror surface, and 4013- third emits mirror surface；
The second prism of 501-, the second convex lens of 502-；
5011- first receives mirror surface, and 5012- second receives mirror surface, and 5013- third receives mirror surface.
Specific embodiment
To overcome defect in the prior art, the utility model provides a kind of precipitation rain fall sensor.To make the utility model
Purposes, technical schemes and advantages are clearer, practical to this below in conjunction with the attached drawing in the preferred embodiment of the utility model
Technical solution in new embodiment is further described in more detail.In the accompanying drawings, same or similar label table from beginning to end
Show same or similar element or element with the same or similar functions.Described embodiment is the utility model a part
Embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for explaining
The utility model, and should not be understood as limiting the present invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the utility model protection
Range.The embodiments of the present invention are described in detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of precipitation rain fall sensor, including shell 1 and the light transmitting tube 2, the light that are arranged in shell 1
Quick element 3 and the light emitting end lens 4 and optical receiving end lens 5 being oppositely arranged；It is installed by silicagel pad 6 at the top of shell 1
There cannot be gap on the inner surface of windshield 7, and between silicagel pad 6 and windshield 7, light emitting end lens 4 are used for
First part's light that light transmitting tube 2 issues is emitted on windshield 7；Optical receiving end lens 5 are for receiving light emitting
The end lens 4 second part light that is emitted on windshield 7 and reflects and reflect through windshield 7, and the will received
Two some lights focus on light-sensitive element 3.
As a preferred embodiment, light transmitting tube 2 is the LED light emitting device of angle of divergence very little, LED light emitting device weldering
It connects on pcb board, and collectively constitutes test circuit system with other electronic components.
As a preferred embodiment, as shown in Figures 2 and 3, light emitting end lens 4 include the first prism 401 and setting
The first convex lens 402 in 401 front end of the first prism, the first convex lens 402 are used for launch light transmitting tube 2 first
The reception of light splitter carries out light collimation；First prism 401 is used for the first part after the first convex lens 402 collimates
Light is transferred, and is emitted to first part's light on windshield 7.
Further, the first prism 401 includes that the first transmitting mirror surface 4011, second emits mirror surface 4012 and third transmitting
One end of mirror surface 4013, the first transmitting mirror surface 4011 and the second transmitting mirror surface 4012 is connected with the top of shell 1 respectively, and second
The other end for emitting mirror surface 4012 is connected with third transmitting mirror surface 4013, and the first transmitting mirror surface 4011 and third emit mirror surface
The first convex lens 402 is provided between 4013, wherein the first transmitting mirror surface 4011, second emits mirror surface 4012 and third transmitting
Mirror surface 4013 and the angle of 1 top surface of shell are respectively as follows: 22.5 °, 45 °, 45 °.
Wherein, the light that light transmitting tube 2 emits is collimated into directional light by the first convex lens 402, improves raindrop induction
The light signal strength in region；It is propagated simultaneously by the total reflection of the first prism 401, greatly reduces the propagation loss of light.Therefore
There are many being higher by for the more common divergence form of optical efficiency of entire sensor, and the susceptibility of sensor can have greatly improved.
As a preferred embodiment, as shown in Figure 2 and Figure 4, optical receiving end lens 5 include the second prism 501, Yi Jishe
Set the second convex lens 502 in 501 front end of the second prism, the second prism 501 is used for for reflecting or reflecting through windshield 7
Two some lights are transferred, and are emitted to second part light on the second convex lens 502；Second convex lens 502 is used for warp
The second part light of second prism 501 turnover carries out light focusing, makes on second part light focusing to light-sensitive element 3.
Further, the second prism 501 includes that the first reception mirror surface 5011, second receives mirror surface 5012 and third reception
One end of mirror surface 5013, the first reception mirror surface 5011 and the second reception mirror surface 5012 is connected with the top of shell 1 respectively, and second
The other end and third for receiving mirror surface 5012 receive mirror surface 5013 and are connected, and first receives mirror surface 5011 and third reception mirror surface
The second convex lens 5012 is provided between 5013, wherein first, which receives mirror surface 5011, second, receives mirror surface 5012 and third reception
Mirror surface 5013 and the angle of 1 top surface of shell are respectively as follows: 22.5 °, 45 °, 45 °.
It is propagated by the total reflection of the second prism 501, greatly reduces the propagation loss of second part light, make second
Light splitter can gather on the second convex lens 502, meanwhile, light transmitting tube is emitted 2 light focusing by the second convex lens 502
Onto light-sensitive element 7, the received light signal strength of light-sensitive element 3 is improved；Wherein, light emitting end lens 4 and optical receiving end are saturating
Mirror 5 is fixed on the top surface of shell 1 by bonding or the method being molded twice, and makes the first rib of light emitting end lens 4
The prism facets of second prism 501 of mirror 401 and optical receiving end lens 5, about carry out center mirror symmetry at raindrop induction.Its
In, the angle of the first reception mirror surface 5011 and 1 top surface of shell is 22.5 °, can effectively reduce ambient lighting and be mapped to light-sensitive device 7
On, i.e., there is anti-interference to environment light, as shown in Figure 5.
Further, the first convex lens 402, the second convex lens 502, light transmitting tube 2 and light-sensitive element 3 are arranged in shell
On same straight line inside 1, and the distance phase at the top of the center of the first convex lens 401 and the second convex lens 501 to shell 1
Together.
As a preferred embodiment, shell 1 is prepared by the impermeable material of visible light.
The working principle of the utility model are as follows: be collimated into the light that light transmitting tube 2 issues by light emitting end lens 3
Parallel first part's light and propagation of transferring, then successively pass through silicagel pad 6 and windshield 7.Do not have on 7 surface of windshield
When having raindrop, first part's light occurs total reflection and goes back to formation second part light on windshield 7, passes through silicagel pad 6
It is multicast on optical receiving end lens 5, carries out optical path turnover, focuses on light-sensitive element 3, light-sensitive element 3 receives stronger light letter
Number；When there are raindrop on 7 surface of windshield, Hen great first part light is scattered in air, only a small amount of second part light
Line can be reflected finally to be converged on light-sensitive element 7 through optical path, causes the optical signal of light-sensitive element 7 very weak, therefore, by will be photosensitive
After optical signal on element 7 is changed into electric signal, then by electric signal power can judge the presence or absence of rainfall and size.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (8)
1. a kind of precipitation rain fall sensor, which is characterized in that including shell and be arranged in the intracorporal light transmitting tube of the shell, light
Quick element and the light emitting end lens and optical receiving end lens being oppositely arranged；
The top of the shell is mounted on the inner surface of windshield by silicagel pad；
The light emitting end lens are used to first part's light that the light transmitting tube issues being emitted to the windshield
On；
The optical receiving end lens are emitted on the windshield and through windshield for receiving the light emitting end lens
The second part light of reflection and refraction, and will be on the second part light focusing to the light-sensitive element that received.
2. a kind of precipitation rain fall sensor according to claim 1, which is characterized in that the light transmitting tube is angle of divergence very little
LED light emitting device.
3. a kind of precipitation rain fall sensor according to claim 1, which is characterized in that the light emitting end lens include the first rib
Mirror and the first convex lens that first prism front end is set；
The reception for first part's light that first convex lens is used to launch the light transmitting tube carries out light collimation；
First prism makes described for transferring to first part's light after first convex lens collimates
First part's light is emitted on the windshield.
4. a kind of precipitation rain fall sensor according to claim 3, which is characterized in that first prism includes the first transmitting mirror
Face, second transmitting mirror surface and third emit mirror surface, it is described first transmitting mirror surface and second transmitting mirror surface one end respectively with institute
It states and is connected at the top of shell, the other end of the second transmitting mirror surface is connected with third transmitting mirror surface, and described first
First convex lens is provided between transmitting mirror surface and third transmitting mirror surface, wherein the first transmitting mirror surface, second
Transmitting mirror surface and third transmitting mirror surface and the angle of the housing top surface are respectively as follows: 22.5 °, 45 °, 45 °.
5. a kind of precipitation rain fall sensor according to claim 4, which is characterized in that the optical receiving end lens include the second rib
Mirror and the second convex lens that second prism front end is set,
Second prism makes described for transferring to the second part light for reflecting or reflecting through the windshield
Two some lights are emitted on second convex lens；
Second convex lens is used to make described the to second part light progress light focusing transfer through second prism
Two some lights focus on the light-sensitive element.
6. a kind of precipitation rain fall sensor according to claim 5, which is characterized in that second prism includes the first reception mirror
Face, second receive mirror surface and third and receive mirror surface, described first receive mirror surface and second receive one end of mirror surface respectively with institute
It states and is connected at the top of shell, the other end of the second reception mirror surface receives mirror surface with the third and is connected, and described first
It receives mirror surface and the third receives and is provided with second convex lens between mirror surface, wherein described first receives mirror surface, second
It receives mirror surface and third receives mirror surface and the angle of the housing top surface is respectively as follows: 22.5 °, 45 °, 45 °.
7. a kind of precipitation rain fall sensor according to claim 6, which is characterized in that first convex lens, the second convex lens,
Light transmitting tube and light-sensitive element are arranged on the same straight line of the enclosure interior, and first convex lens and second convex
The distance of the center of lens to case top is identical.
8. a kind of precipitation rain fall sensor according to any one of claims 1 to 7, which is characterized in that the shell is by visible light
Impermeable material is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821855993.0U CN209400722U (en) | 2018-11-12 | 2018-11-12 | A kind of precipitation rain fall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821855993.0U CN209400722U (en) | 2018-11-12 | 2018-11-12 | A kind of precipitation rain fall sensor |
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| Publication Number | Publication Date |
|---|---|
| CN209400722U true CN209400722U (en) | 2019-09-17 |
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ID=67879883
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821855993.0U Active CN209400722U (en) | 2018-11-12 | 2018-11-12 | A kind of precipitation rain fall sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111489638A (en) * | 2020-05-29 | 2020-08-04 | 维沃移动通信有限公司 | Electronic device |
| WO2022267657A1 (en) * | 2021-06-24 | 2022-12-29 | 中兴通讯股份有限公司 | Method and apparatus for identifying water flow into screen, and electronic device |
-
2018
- 2018-11-12 CN CN201821855993.0U patent/CN209400722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111489638A (en) * | 2020-05-29 | 2020-08-04 | 维沃移动通信有限公司 | Electronic device |
| WO2022267657A1 (en) * | 2021-06-24 | 2022-12-29 | 中兴通讯股份有限公司 | Method and apparatus for identifying water flow into screen, and electronic device |
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