CN201392312Y - Raindrop sensing device - Google Patents
Raindrop sensing device Download PDFInfo
- Publication number
- CN201392312Y CN201392312Y CN 200920051682 CN200920051682U CN201392312Y CN 201392312 Y CN201392312 Y CN 201392312Y CN 200920051682 CN200920051682 CN 200920051682 CN 200920051682 U CN200920051682 U CN 200920051682U CN 201392312 Y CN201392312 Y CN 201392312Y
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- CN
- China
- Prior art keywords
- light
- sensing device
- receiving element
- windshield
- raindrop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a raindrop sensing device, in particular to a raindrop sensing device which is an automatic control device applied for an automobile windshield wiper and is based on characteristics of reflection and refraction of light rays in optically thinner medium and optically denser medium to judge whether to start the windshield wiper and to control the speed of the windshield wiper. The raindrop sensing device comprises a shell and a light ray signal transceiving device which consists of a light ray transmitting element and a light ray receiving element. The light ray transmitting element and the light ray receiving element are respectively arranged on the windshield in balance, and light guide pieces are arranged between the light ray transmitting element, the light ray receiving element and the windshield. The raindrop sensing device is reasonable in design and strong in practicability, the detection range of the sensing device can be improved and the detection accuracy can be effectively improved even if the thickness of the windshield panel varies.
Description
Technical field
The utility model relates to the raindrop sensing device, especially refer to a kind of utilize light light dredge and optically denser medium in the reflection and the refraction characteristic that produce, further judging whether to need to open the raindrop sensing device of rain brush and control rain brush speed, is a kind of automatic control equipment that is applicable to windshield wiper.
Background technology
Automatic induction system on the automobile is used for responding to raindrop at present, and it is fixed on the windshield of automobile usually.Its principle of work is the convex lens of light by photocell process input side, becomes quasi-parallel light.On the reference planes of raindrop attached to transparent panel, light process transparent panel is with reference to reflection.The line of collimation light that output lens will reflect compiles to light receiving element, thereby makes light receiving element can receive this light beam.
In known systems, because owing to general sensing device on the market does not all increase medium, the problem of bringing thus is effectively to transmit and receive total reflection light.Wherein the energy of effective sunlight is little, so cause reliability not high; Next is because emitter forms induction region in the form of a ring, in the time of the device emission, forms effective passage between receiving trap and the emitter, so surveyed area is less.That is to say and have only when on the surveyed area raindrop being arranged, this sensor just might detect, so sensing range is extremely limited, and when the thickness of windshield changes, light receiving element will not receive useful signal, so the windshield of different-thickness, the necessary induction installation that is equipped with different size.
So, just wish very that can work out the sensing range that can improve sensing device can also can improve the sensing device of accuracy of detection again effectively under windshield variation in thickness situation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of sensing range that can improve sensing device can also can improve the raindrop sensing device of accuracy of detection effectively under transparent panel variation in thickness situation again.In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of raindrop sensing device, comprise housing and light signal R-T unit, the light signal R-T unit comprises photocell and light receiving element, wherein, described photocell and light receiving element, balance is arranged on the windshield mutually, between photocell, light receiving element and the windshield light conductor is arranged.
Described light signal R-T unit is a surface-mount type or embedded.
Described light receiving element is the large tracts of land photo-sensitive cell.
The light that described photocell is launched is infrared ray.
Described light conductor can be the transparent material close with glass refraction and makes.
Described light conductor can be silica gel and makes.
The beneficial effects of the utility model are: (1) can improve the sensing range of sensing device, can strengthen the detection effect; (2) can under transparent panel variation in thickness situation, also can improve accuracy of detection effectively; (3) use simple installation, structure is small and exquisite, and is practical.
Description of drawings
Accompanying drawing 1 is installed on the windshield inner wall surface for the utility model, sees synoptic diagram in the past from Fig. 3 H-H direction;
Accompanying drawing 2 is a detection synoptic diagram of the present utility model;
Accompanying drawing 3 is the vertical view of photocell of the present utility model, light conductor, light receiving element arrangement.
Accompanying drawing acceptance of the bid keep the score state as follows: 10---photocell; 11---circuit board; 12---frame; 13---light receiving element; 14---windshield; 14a---windshield inwall; 14b---windshield outer wall; 15a---emission light conductor; 15b---light-receiving light conductor.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, the utility model comprises housing and light signal R-T unit, and the light signal R-T unit comprises photocell 10 and light receiving element 13.Wherein, photocell 10 and light receiving element 13 mutual balances are arranged on the windshield 14, between photocell 10, light receiving element 13 and the windshield 14 light conductor 15a-15b are arranged.
Described light signal R-T unit is a surface-mount type or embedded.Light receiving element 13 is the large tracts of land photo-sensitive cell, and the light that photocell 10 is launched is infrared ray; Light conductor 15a-15b can be the transparent material close with glass refraction (as silica gel) and makes.
Described raindrop sensing device is applied on the rain brush automatic control equipment, wherein this automatic control equipment is installed on the inner wall surface 14a of windshield 14 of automobile, for effective work should be installed in the grooming zone of rain brush, for fear of blocking pilot's line of vision, generally be installed in the topmost of the grooming zone inwall of corresponding rain brush simultaneously.The raindrop sensing device is surveyed the raindrop that are attached to the grooming district optically, with output signal to the rain brush automatic control equipment.Fig. 1 sees synoptic diagram in the past from Fig. 3 H-H direction when being installed in windshield 14 inwall 14a according to the utility model patent.Fig. 3 is the vertical view that photocell, light conductor, the light receiving element of Raindrop sensor arranged.
As shown in Figure 1, when photocell 10 during at light between 28 °-48 ° of emission and the angle of transparent panel because the incident angle of this light is greater than 42 ° in the glass-air cirtical angle of total reflection, thus this light glass is inner can the generation total reflection.The travel path of light when solid line is represented not have raindrop, through repeatedly arriving light receiving element 13 after the total reflection, this moment, light receiving element 13 received all light quantities that photocell 10 sends from photocell 10.Just be positioned at when the raindrop on outer wall in the reflecting interface of this light and outer wall, because the incident angle of this light is less than 63 ° in the glass-water cirtical angle of total reflection, so this light major part is injected raindrop, and emission is reflected and refraction effect on the interface of raindrop and air, understand some light quantity like this and inject in the air, have only the only a few light quantity may finally enter light receiving element 13.So when not having raindrop and raindrop are arranged, in most cases, the light quantity that light receiving element 13 receives has very big difference.
Photocell (LED) 10 luminous (for example, Infrared), and reflected by windshield 14.Then, for example the light receiving element 13 of infrared photoelectric cell receives this light, and wherein this light is reflected by windshield 14.Same process, this raindrop sensing device has detected the quantity of raindrop.Particularly, the raindrop sensing device is to judge raindrop quantity according to the reduction that light receiving element 13 receives light.The minimizing of light quantity is because attached to the raindrop on the outer wall surface 14b, has caused the change (perhaps reducing) of outer wall surface 14b emissivity.The quantity of photocell 10 and infrared photoelectric cell and combination can change.
The detailed method that rainfall is detected is described herein.The raindrop sensing device is surveyed rainfall by slip.When photocell 10 was closed, the output voltage of infrared photoelectric cell was V
OFFBe exactly the light quantity that comes from external environment condition, this voltage is that the light with ambient infrared light changes.In the time of photocell 10 conductings, the output voltage V of infrared photoelectric cell
ONFor being exactly comes from external environment condition light quantity and photocell 10 refraction luminous the adding up in back.So the slip of light quantity can calculate by following formula: (V
ON-V
OFF)/V
LED* 100%.This V
LEDShould be photocell 10 emission voltages.
Light conductor is connected to photocell 10 and light receiving element 13 on the windshield 14, wherein launches light conductor 15a and is connected with photocell 10, and light-receiving light conductor 15b is connected with light receiving element 13.Light conductor is general selects the transparent material (as silica gel) close with glass refraction (being about 1.5) to make.
Obviously the foregoing description is not to restriction of the present utility model, and above-mentioned raindrop sensing device can also have many variations.
Though gone through the utility model in conjunction with above-mentioned example, some that should be understood that professional person in the industry can expect apparently are identical, and alternative scheme all falls within the protection domain that the utility model claim limited.
Claims (6)
1. raindrop sensing device, comprise housing and light signal R-T unit, the light signal R-T unit comprises photocell and light receiving element, it is characterized in that, described photocell and light receiving element, balance is arranged on the windshield mutually, between photocell, light receiving element and the windshield light conductor is arranged.
2. raindrop sensing device according to claim 1 is characterized in that, described light signal R-T unit is a surface-mount type or embedded.
3. raindrop sensing device according to claim 1 is characterized in that, described light receiving element is the large tracts of land photo-sensitive cell.
4. according to claim 1,2,3 each described raindrop sensing devices, it is characterized in that the light that described photocell is launched is infrared ray.
5. according to claim 1,2,3 each described raindrop sensing devices, it is characterized in that described light conductor can be the transparent material close with glass refraction and makes.
6. raindrop sensing device according to claim 5 is characterized in that described light conductor can be silica gel and makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920051682 CN201392312Y (en) | 2009-02-26 | 2009-02-26 | Raindrop sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920051682 CN201392312Y (en) | 2009-02-26 | 2009-02-26 | Raindrop sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392312Y true CN201392312Y (en) | 2010-01-27 |
Family
ID=41599133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920051682 Expired - Fee Related CN201392312Y (en) | 2009-02-26 | 2009-02-26 | Raindrop sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392312Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103838064A (en) * | 2012-11-26 | 2014-06-04 | 深圳中兴力维技术有限公司 | Self-induction windshield wiper device for camera and realizing method thereof |
| CN103890563A (en) * | 2011-11-02 | 2014-06-25 | 株式会社理光 | Image pickup unit and vehicle in which image pickup unit is mounted |
| CN104354571A (en) * | 2014-08-29 | 2015-02-18 | 哈尔滨工业大学深圳研究生院 | Automobile-used device with sight improving function |
| CN106323917A (en) * | 2015-07-03 | 2017-01-11 | 现代自动车株式会社 | Rain sensor having frost sensing function |
| WO2018041109A1 (en) * | 2016-08-31 | 2018-03-08 | Zhejiang Dahua Technology Co., Ltd. | Deivces and methods for detecting and removing vapor |
| CN107786790A (en) * | 2016-08-31 | 2018-03-09 | 浙江大华技术股份有限公司 | A kind of windshield decision maker and video camera |
| WO2019095093A1 (en) * | 2017-11-14 | 2019-05-23 | 深圳市汇顶科技股份有限公司 | Photoelectric detector, sensor, and smart device |
| CN109916857A (en) * | 2017-12-11 | 2019-06-21 | 郑州宇通客车股份有限公司 | A kind of glass of automobile-used identification of hazing and the detection device that hazes |
-
2009
- 2009-02-26 CN CN 200920051682 patent/CN201392312Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890563A (en) * | 2011-11-02 | 2014-06-25 | 株式会社理光 | Image pickup unit and vehicle in which image pickup unit is mounted |
| CN103838064A (en) * | 2012-11-26 | 2014-06-04 | 深圳中兴力维技术有限公司 | Self-induction windshield wiper device for camera and realizing method thereof |
| CN103838064B (en) * | 2012-11-26 | 2017-05-24 | 深圳中兴力维技术有限公司 | Self-induction windshield wiper device for camera, realizing method thereof, and camera |
| CN104354571A (en) * | 2014-08-29 | 2015-02-18 | 哈尔滨工业大学深圳研究生院 | Automobile-used device with sight improving function |
| CN106323917A (en) * | 2015-07-03 | 2017-01-11 | 现代自动车株式会社 | Rain sensor having frost sensing function |
| CN106323917B (en) * | 2015-07-03 | 2021-02-09 | 现代自动车株式会社 | Rainwater sensor with frost sensing function |
| CN107786790A (en) * | 2016-08-31 | 2018-03-09 | 浙江大华技术股份有限公司 | A kind of windshield decision maker and video camera |
| EP3488602A4 (en) * | 2016-08-31 | 2020-12-02 | Zhejiang Dahua Technology Co., Ltd | Devices and methods for detecting and removing vapor |
| WO2018041109A1 (en) * | 2016-08-31 | 2018-03-08 | Zhejiang Dahua Technology Co., Ltd. | Deivces and methods for detecting and removing vapor |
| US10928630B2 (en) | 2016-08-31 | 2021-02-23 | Zhejiang Dahua Technology Co., Ltd. | Devices and methods for detecting and removing vapor |
| US11709357B2 (en) | 2016-08-31 | 2023-07-25 | Zhejiang Dahua Technology Co., Ltd. | Devices and methods for detecting and removing vapor |
| WO2019095093A1 (en) * | 2017-11-14 | 2019-05-23 | 深圳市汇顶科技股份有限公司 | Photoelectric detector, sensor, and smart device |
| CN109916857A (en) * | 2017-12-11 | 2019-06-21 | 郑州宇通客车股份有限公司 | A kind of glass of automobile-used identification of hazing and the detection device that hazes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20110226 |