CN204650000U - The vehicles of a kind of rainfall monitor and application thereof - Google Patents
The vehicles of a kind of rainfall monitor and application thereof Download PDFInfo
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- CN204650000U CN204650000U CN201520242363.6U CN201520242363U CN204650000U CN 204650000 U CN204650000 U CN 204650000U CN 201520242363 U CN201520242363 U CN 201520242363U CN 204650000 U CN204650000 U CN 204650000U
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- rainfall
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Abstract
The utility model provides the vehicles of a kind of rainfall monitor and application thereof, comprise sense channel, reference channel, light sensor and rainfall decision circuitry, described sense channel comprises the first luminescent device, the first collimation lens and the first condenser lens, described reference channel comprises the second luminescent device, the second collimation lens and the second condenser lens, described in the process of rainfall judgement, introduce reference channel, can get rid of when darkness replaces, interference is caused to the judgement of light sensor, rainfall is judged more accurate.And when on the windshield that described rainfall monitor is arranged on the vehicles, one wiper control circuit be electrically connected with rainfall decision circuitry is set, wiper control circuit can according to the rainfall size of rainfall decision circuitry monitoring, adjustment is carried out to the gear of vehicles wiper, easy to use, intelligent, the factor of diverting one's attention during driver can be reduced, improve the security of driving.
Description
Technical field
The utility model relates to control and measuring field, particularly relates to the vehicles of a kind of rainfall monitor and application thereof.
Background technology
Rain sensor is a kind of sensor detecting real-time rainfall, and existing rain sensor is commercially mainly the rain sensor based on infrared light scattering formula.
Based on the rain sensor of infrared light scattering formula, at least there is a luminescent device and an optical sensor device, the Infrared that luminescent device is launched reflexes to optical sensor device through windshield in without rain, and have the scattering of part Infrared in rainy and lose, judge that Infrared change reaches the function detecting and rain at optical sensor device.
But also there is the interference of Infrared in the ambient light in driving conditions, when particularly darkness replaces, interference can be caused to the judgement of optical sensor device.Such as surround lighting can change the light intensity that optical sensor device receives, and at certain operating conditions, the spectrum sensitivity of some photodiodes is not a constant, but along with direct current Strength Changes.This means that even if other conditions are constant, rainfall signal also there will be Rapid Variable Design if rain sensor is in the staggered region movement fast of light and shade.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is the vehicles providing a kind of rainfall monitor and application thereof, judges inaccurate problem for solving rainfall in prior art.
For achieving the above object and other relevant objects, the utility model provides a kind of rainfall monitor, comprising: with the first luminescent device of a fixed frequency utilizing emitted light pulse; Being arranged at glass first side external surface, to be collimated into the first directional light with the light pulse of being launched by described first luminescent device incident from described glass first side, and make described first directional light be greater than described glass to the critical angle of air and be less than described glass to the critical angle of water the first incident angles described in the first collimation lens of glass second side inside surface; Be arranged at described glass first side external surface with the first condenser lens being undertaken focusing on by the first directional light of described glass second side internal surface reflection; Staggered with the second luminescent device of same frequency utilizing emitted light pulse in time with described first luminescent device; Being arranged at described glass first side external surface, to be collimated into the second directional light with the light pulse of being launched by described second luminescent device incident from described glass first side, and make described second directional light be greater than described glass to the critical angle of water the second incident angles described in the second collimation lens of glass second side inside surface; Be arranged at described glass first side external surface with the second condenser lens being undertaken focusing on by the second directional light of described glass second side internal surface reflection; One light sensor receiving the light pulse from described first condenser lens and described second condenser lens outgoing; The rainfall decision circuitry be electrically connected with described light sensor.
Optionally, described rainfall monitor is arranged on the windshield of vehicle, and to monitor the rainfall of described vehicle windscreen, described rainfall monitor also has a wiper control circuit be electrically connected with described rainfall decision circuitry.
Optionally, described wiper control circuit is electrically connected with described rainfall decision circuitry by the one in serial bus, CAN or LIN bus.
Optionally, described glass is float glass.
Optionally, described first incident angle is greater than 40.81 ° and is less than 60.38 °; And optionally, described second incident angle is greater than 60.38 °.
Optionally, described light sensor is infrared photodiode, and the photosensitive surface of described light sensor is provided with optical filter.
Optionally, described first luminescent device and described second luminescent device are infrared light pulse luminescent device.
Optionally, one is also comprised with predetermined period unlatching or the luminescent device control circuit of closing described first luminescent device and described second luminescent device.
For achieving the above object and other relevant objects, the utility model also provides a kind of vehicles, and the described vehicles have windshield, and the windshield of the described vehicles is installed the rainfall monitor described in above any one.
As mentioned above, the vehicles of rainfall monitor of the present utility model and application thereof, in the process that rainfall judges, introduce the reference channel be made up of the second luminescent device, the second collimation lens and the second condenser lens, can get rid of when darkness replaces, interference is caused to the judgement of light sensor, rainfall is judged more accurate.And when on the windshield that described rainfall monitor is arranged on the vehicles, one wiper control circuit be electrically connected with rainfall decision circuitry is set, wiper control circuit can according to the rainfall size of rainfall decision circuitry monitoring, adjustment is carried out to the gear of vehicles wiper, easy to use, intelligent, the factor of diverting one's attention during driver can be reduced, improve the security of driving.
Accompanying drawing explanation
Fig. 1 is shown as rainfall monitor of the present utility model structural representation in one embodiment.
Fig. 2 is shown as the first luminescent device and the second luminescent device light pulse emission schematic diagram in one embodiment of rainfall monitor of the present utility model.
Fig. 3 is shown as the first luminescent device and the second luminescent device light pulse emission schematic diagram in one embodiment of rainfall monitor of the present utility model.
Element numbers explanation
1 first luminescent device
2 glass
3 first collimation lenses
4 first condenser lenses
5 second luminescent devices
6 second collimation lenses
7 second condenser lenses
8 light sensors
9 rainfall decision circuitry
10 wiper control circuits
Embodiment
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.
Refer to Fig. 1 to Fig. 3.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Refer to Fig. 1, be shown as a kind of rainfall monitor structural representation in one embodiment that the utility model provides, described rainfall monitor comprises:
With the first luminescent device 1 of a fixed frequency utilizing emitted light pulse, preferably, described first luminescent device 1 is infrared light pulse luminescent device.
Being arranged at glass 2 first side external surface, to be collimated into the first directional light with the light pulse of being launched by described first luminescent device 1 incident from described glass 2 first side, and make described first directional light be less than the first collimation lens 3 of glass second side inside surface described in the first incident angles that described glass 2 arrives the critical angle of water to be greater than described glass 2 to the critical angle of air.
Be arranged at described glass 2 first side external surface with the first condenser lens 4 being undertaken focusing on by the first directional light of described glass 2 second side internal surface reflection.
Described first luminescent device 1, first collimation lens 3, and first condenser lens 4 form the sense channel of described rainfall monitor, such as, when described glass 2 is the conventional float glass of general automobile, its refractive index is 1.53, air refraction is 1, water refractive index is 1.33, the critical angle calculating glass-air is accordingly 40.81 °, it is 60.38 ° from the critical angle of water-glass, so, in the present embodiment, when adopting float glass, described first incident angle a is 40.81 ° ~ 60.38 °, to make when glass 2 surface does not have water, and described directional light is when inciding air with described first incident angle a from described glass 2, be totally reflected, when there is water on described glass 2 surface, and described directional light is when inciding air with described first incident angle a from described glass 2, described first directional light part is refracted in water, and part is reflected, and the area of water cover glass is larger, the directional light be refracted is also more, can judge rainfall according to the number of the directional light be refracted.
Described rainfall monitor also comprises:
Staggered with the second luminescent device 5 of same frequency utilizing emitted light pulse in time with described first luminescent device 1, and the energy of utilizing emitted light pulse is identical, preferably, described second luminescent device 5 is infrared light pulse luminescent device.
Being arranged at described glass 2 first side external surface, to be collimated into the second directional light with the light pulse of being launched by described second luminescent device 5 incident from described glass first side, and make described second directional light be greater than described glass 2 to the critical angle of water the second incident angles described in the second collimation lens 6 of glass 2 second side inside surface; Such as, when described glass is the conventional float glass of general automobile, its refractive index is 1.53, air refraction is 1, and water refractive index is 1.33, and the critical angle calculating glass-air is accordingly 40.81 °, it is 60.38 ° from the critical angle of water-glass, so, in the present embodiment, when adopting float glass, described second incident angle b is greater than 60.38 °, and described second directional light is with the incident glass 2 of described second incident angle b, described glass 2 surface not or when having water, is all totally reflected.
Be arranged at described glass 2 first side external surface with the second condenser lens 7 being undertaken focusing on by the second directional light of described glass 2 second side internal surface reflection.
Described second luminescent device 5, second collimation lens 6, and second condenser lens 7 form the reference channel of described rainfall monitor, described second luminescent device 5 and described first luminescent device 1 are staggered with the pulse of same frequency utilizing emitted light in time, the situation of its utilizing emitted light pulse is such as shown in Figure 2, dotted line is that the pulse of sense channel sends situation, solid line is that the pulse of reference channel sends situation, the transmission cycle of pulse is 0.1ms, transmission frequency is 10khz, be greater than the change frequency of surround lighting, and reference channel and sense channel light pulse are interval transmission, and the energy of two pulses is identical, can get rid of when rainfall monitoring, the impact of surround lighting factor.Again such as, the situation that described first luminescent device 1 and the second luminescent device 5 send infrared pulse is as shown in Figure 3, dotted line is that the pulse of sense channel sends situation, solid line is that the pulse of reference channel sends situation, because in rainfall monitoring process, do not need so to carry out rainfall monitoring frequently, the detection (namely the first luminescent device 1 and the second luminescent device 5 do not launch any pulse) of surround lighting can be inserted in centre, one of the now monitoring of surround lighting foundation that can be used as lighting switch, the luminescent device control circuit (not shown) such as making rainfall monitor open with predetermined period with one or to close described first luminescent device 1 and described second luminescent device 5 is electrically connected, namely with rule monitoring as shown in Figure 3, described luminescent device control circuit (not shown) take 0.6s as the cycle, wherein front 0.4s closes described first luminescent device 1 and described second luminescent device 5, to carry out the monitoring of surround lighting, as lighting switch according to one of, rear 0.2s opens described first luminescent device 1 and described second luminescent device 5, carry out the monitoring of rainfall, so can more reasonably utilize described rainfall monitor.
Described rainfall monitor also has a reception from the light sensor 8 of the light pulse of described first condenser lens 4 and described second condenser lens 7 outgoing and the rainfall decision circuitry 9 that is electrically connected with described light sensor 8.Described light sensor 8 monitors the light sent by reference channel and sense channel in turn, and, preferably, described light sensor 8 is infrared photodiode, optical filter can be added on described infrared photodiode top, light beyond filtering infrared spectrum, avoids the interference of surround lighting further.In rainfall measurement process, the light pulsing intervals of reference channel and sense channel sends, and spacing frequency needs much larger than surround lighting change frequency, so adjacent reference light pulse and detect light pulse and can think and to receive under identical surround lighting.Both are poor, and the interference that just surround lighting and windscreen wiper can be caused is removed (accidental data once in a while should by filtering).Finally represent the following formulae discovery of light energy losses number percent of surveyed area raindrop amount:
R
luminous energy scattering number percent=(P
reference channel-P
sense channel)/P
reference channel× 100%
Wherein R
light energy losses number percentfor light energy losses percentage, P
reference channelfor reference channel receives the size of light pulse, P
sense channelfor sense channel receives the size of light pulse, light energy losses number percent can as the foundation controlling windscreen wiper gear.
Described rainfall monitor is preferably disposed on the windshield of vehicle, to monitor the rainfall of described vehicle windscreen, described rainfall monitor also has a wiper control circuit 10 be electrically connected with described rainfall decision circuitry 9, the light energy losses number percent that can calculate according to fuzzy algorithm and rainfall decision circuitry controls vehicle windscreen wiper gear, in the present embodiment, preferably, described wiper control circuit is electrically connected with described rainfall decision circuitry 9 by the one in serial bus, CAN or LIN bus.
Present invention also offers vehicles, the described vehicles have windshield, rainfall monitor more than the windshield of the described vehicles is installed described in each embodiment, the rainfall on windshield glass of transportation facility is monitored with real-time intelligent, and the windscreen wiper gear regulating the described vehicles according to the rainfall of monitoring.
In sum, the vehicles of rainfall monitor of the present utility model and application thereof, in the process that rainfall judges, introduce the reference channel be made up of the second luminescent device, the second collimation lens and the second condenser lens, can get rid of when darkness replaces, interference is caused to the judgement of light sensor, rainfall is judged more accurate.And when on the windshield that described rainfall monitor is arranged on the vehicles, one wiper control circuit be electrically connected with rainfall decision circuitry is set, wiper control circuit can according to the rainfall size of rainfall decision circuitry monitoring, adjustment is carried out to the gear of vehicles wiper, easy to use, intelligent, the factor of diverting one's attention during driver can be reduced, improve the security of driving.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (10)
1. a rainfall monitor, is characterized in that, comprising:
With the first luminescent device of a fixed frequency utilizing emitted light pulse;
Being arranged at glass first side external surface, to be collimated into the first directional light with the light pulse of being launched by described first luminescent device incident from described glass first side, and make described first directional light be greater than described glass to the critical angle of air and be less than described glass to the critical angle of water the first incident angles described in the first collimation lens of glass second side inside surface;
Be arranged at described glass first side external surface with the first condenser lens being undertaken focusing on by the first directional light of described glass second side internal surface reflection;
Staggered with the second luminescent device of same frequency utilizing emitted light pulse in time with described first luminescent device;
Being arranged at described glass first side external surface, to be collimated into the second directional light with the light pulse of being launched by described second luminescent device incident from described glass first side, and make described second directional light be greater than described glass to the critical angle of water the second incident angles described in the second collimation lens of glass second side inside surface;
Be arranged at described glass first side external surface with the second condenser lens being undertaken focusing on by the second directional light of described glass second side internal surface reflection;
One light sensor receiving the light pulse from described first condenser lens and described second condenser lens outgoing;
The rainfall decision circuitry be electrically connected with described light sensor.
2. rainfall monitor according to claim 1, it is characterized in that, described rainfall monitor is arranged on the windshield of vehicle, and to monitor the rainfall of described vehicle windscreen, described rainfall monitor also has a wiper control circuit be electrically connected with described rainfall decision circuitry.
3. rainfall monitor according to claim 2, is characterized in that: described wiper control circuit is electrically connected with described rainfall decision circuitry by the one in serial bus, CAN or LIN bus.
4. rainfall monitor according to claim 1, is characterized in that, described glass is float glass.
5. rainfall monitor according to claim 4, is characterized in that, described first incident angle is greater than 40.81 ° and is less than 60.38 °.
6. rainfall monitor according to claim 4, is characterized in that, described second incident angle is greater than 60.38 °.
7. rainfall monitor according to claim 1, is characterized in that: described light sensor is infrared photodiode, and the photosensitive surface of described light sensor is provided with optical filter.
8. rainfall monitor according to claim 1, is characterized in that: described first luminescent device and described second luminescent device are infrared light pulse luminescent device.
9. rainfall monitor according to claim 1, is characterized in that: also comprise one with predetermined period unlatching or the luminescent device control circuit of closing described first luminescent device and described second luminescent device.
10. vehicles, the described vehicles have windshield, it is characterized in that: on the windshield of the described vehicles, install the rainfall monitor according to any one of claim 1 ~ 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520242363.6U CN204650000U (en) | 2015-04-20 | 2015-04-20 | The vehicles of a kind of rainfall monitor and application thereof |
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| CN201520242363.6U CN204650000U (en) | 2015-04-20 | 2015-04-20 | The vehicles of a kind of rainfall monitor and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485625A (en) * | 2016-01-29 | 2016-04-13 | 湖州巨力铝型材有限公司 | Street lamp lampshade suitable for illumination in rainy days |
| CN105485621A (en) * | 2016-01-29 | 2016-04-13 | 湖州巨力铝型材有限公司 | Street lamp shade having lighting function in rainy days |
| CN108729159A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of Multifunctional clothes airing device |
| CN108729160A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of clothes hanger |
| CN108729157A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of airer device |
| CN108761575A (en) * | 2018-05-17 | 2018-11-06 | 广州达泰钧丰电子科技有限公司 | A kind of rain sensor |
| CN110497776A (en) * | 2019-09-02 | 2019-11-26 | 移康智能科技（上海）股份有限公司 | A kind of vehicle intelligent glass defogging equipment |
| CN112313500A (en) * | 2018-06-25 | 2021-02-02 | 力特保险丝公司 | Optical rain sensor with dynamic optical configuration control |
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2015
- 2015-04-20 CN CN201520242363.6U patent/CN204650000U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485625A (en) * | 2016-01-29 | 2016-04-13 | 湖州巨力铝型材有限公司 | Street lamp lampshade suitable for illumination in rainy days |
| CN105485621A (en) * | 2016-01-29 | 2016-04-13 | 湖州巨力铝型材有限公司 | Street lamp shade having lighting function in rainy days |
| CN107850286A (en) * | 2016-01-29 | 2018-03-27 | 柳超 | A kind of street lampshade and street lamp |
| CN108729159A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of Multifunctional clothes airing device |
| CN108729160A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of clothes hanger |
| CN108729157A (en) * | 2017-04-20 | 2018-11-02 | 杭州思文科科技有限公司 | A kind of airer device |
| CN108761575A (en) * | 2018-05-17 | 2018-11-06 | 广州达泰钧丰电子科技有限公司 | A kind of rain sensor |
| CN112313500A (en) * | 2018-06-25 | 2021-02-02 | 力特保险丝公司 | Optical rain sensor with dynamic optical configuration control |
| CN112313500B (en) * | 2018-06-25 | 2024-07-16 | 力特保险丝公司 | Optical rain sensor with dynamic optical configuration control |
| CN110497776A (en) * | 2019-09-02 | 2019-11-26 | 移康智能科技（上海）股份有限公司 | A kind of vehicle intelligent glass defogging equipment |
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