CN207816818U - The mist sensor and motor vehicle of a kind of motor vehicle for being moved on road surface - Google Patents
The mist sensor and motor vehicle of a kind of motor vehicle for being moved on road surface Download PDFInfo
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- CN207816818U CN207816818U CN201721365845.6U CN201721365845U CN207816818U CN 207816818 U CN207816818 U CN 207816818U CN 201721365845 U CN201721365845 U CN 201721365845U CN 207816818 U CN207816818 U CN 207816818U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
Abstract
The utility model is related to a kind of the mist sensor (2) and motor vehicle of the motor vehicle (1) for being moved on road surface (6), the mist sensor has：Transmitter unit (4), for to area of space (3) the transmitting optical signalling (8) around motor vehicle (1), which to include at least two of the first wave length area (8a) and second wave length area (8b) in the spectrum from optical signalling (8) wavelength zone for differing by more than 50nm；Receiving unit (5), the reflection signal from the area of space scattered reflection for receiving the optical signalling (8)；And it is designed to the analytic unit (9) of the reflectivity of determining and more each wavelength zone.
Description
Technical field
The utility model is related to a kind of mist sensor of motor vehicle for being moved on road surface and include mist sensor
Motor vehicle.
Background technology
This kind of mist sensor is had by so-called open optical grating constitution：Transmitter unit is used for around motor vehicle
Area of space emit optical signalling；Receiving unit, for receiving reflection of the optical signalling from the area of space scattered reflection
Signal；And it is designed to the analytic unit of analysis reflectivity.In this regard, be to use such light source than more typical scheme,
I.e. its spectrum has maximum value in middle infrared.It is known that since signal has maximum of intensity in spectrum middle infrared,
So the determination of reflection results is not enough to reliably derive with the presence or absence of mist.In order to improve the reliability of mist detection, it is equipped with other
Sensor, such as temperature sensor, to improve the inference precision of mist detection.For example, the reliability of mist detection is due to motor vehicle
The reflection of surrounding typical surface is interfered, and thus leads to the error detector to mist.
Utility model content
In the above context, a kind of reliable solution for implementing mist detection is needed.The task passes through according to various implementations
The mist sensor of example is solved.It is a kind of to have the advantages that same motor vehicle is that dependent claims illustrate object.It is advantageous
Embodiment is that specific embodiment illustrates object respectively.It should be pointed out that the feature individually illustrated in embodiment can be with
Arbitrarily, technically feasible mode is combined with each other, and constitutes the other embodiment of the utility model.The specification, especially
Description taken in conjunction with the accompanying drawings book additionally carries out feature description and detailed description to the utility model.
The utility model is related to a kind of mist sensors of the motor vehicle for being moved on road surface.It is according to the present utility model
Mist sensor has the transmitter unit for emitting optical signalling.The optical signalling has at least two wavelength in its spectrum
Area, i.e. first wave length area and second wave length area, in this regard, two wavelength zones at least differ 50nm.The explanation of concept " range " is compared
It is wide in range, refer to a kind of homogeneous ray of respective wavelength for example generated by semiconductor diode but it is also possible to be spectral width
Less than 200nm, the preferably shorter than ray of 50nm.According to the utility model, the wavelength zone for including in the spectrum of optical signalling is simultaneously
It does not force to need while projecting, but preferably continuously or is in chronological order generated and projected by transmitter unit.In other words, generally
Read " optical signalling " and be not limited to odd number, but include signal by it is multiple while the sub- optical signalling of transmitting of staggering the time form
The case where, which can also be generated by the different transmitters of transmitter unit.Transmitter unit according to the present utility model
It should allow to the area of space emitted optical signalling to around motor vehicle in design.It is just moved forward by regulation motor-driven
For vehicle, which is preferably placed at motor vehicle front, such as prolongs from motor vehicle front according to the transmission power of transmitter unit
At the distance for extending to the tens of rice in longitudinal maneuver front side (such as 100 meters maximum).Transmitter unit, which has, is more than 30 °, preferably greatly
In 40 ° of launch angle.It is scattered instead from above-mentioned area of space for receiving optical signal in addition, being additionally provided with according to the utility model
The receiving unit for the reflection signal penetrated.The receiving unit preferably has the sensitivity suitable for above-mentioned wavelength zone.Such as equipped with more
A receiver in relevant wavelength area with respective dominant spectral sensitivity.
In another embodiment, there is receiving unit unique receiver, the receiver to have at least two wavelength zones
There is corresponding sensitivity.One or more receiver is for example respectively photoelectric tube.
In addition, being additionally provided with analytic unit according to the utility model, which is used to determine the reflectivity of each wavelength zone.
For example, the optical signalling that the determination process is launched by comparing with regard to respective wavelength zone is subject to the reflection signal received
It realizes.In this regard, by spectrum, i.e., the observation based on respective wavelength zone and analysis reflectivity can reliably illustrate in motor vehicle
Front whether there is mist.In multinomial field test, utility model people can determine, mistake mist can be caused to visit conventional equipment
The reflectivity rising of survey can make its failure by device according to the present utility model, because analyzing additional wavelength zone extraly
Illustrate, there is the structure for causing reflection, which securely enough to distinguishes mist and other typical cases occurred in road traffic
Reflection case.Especially, in order to reliably distinguish, it is only necessary to two wavelength zones are analyzed, as long as its range limit
It is worth spaced more than 50nm, wherein for monochromatic light emitting, relevant wavelength difference is more than 50nm.In addition, practical new
The problem of type people also found is, for conventional mist sensor, in the load-carrying vapour with frosting of motor vehicle front
Vehicle, extend to vegetation in runway and concrete surface or with the surface of concrete similar material (such as tunnel smallpox
Plate) error detector to mist is may result in, and then driver is allowed to be at a loss because of error message.The problem can pass through root
It is solved according to the mist sensor of the utility model.More precisely, since higher reliability can be in terms of mist detection for it
The Rear Fog Lamp for automatically opening motor vehicle, because no longer forcing needs after being verified by multi-wavelength area according to the utility model
The range estimation of driver is examined.
A kind of embodiment of mist sensor according to the present utility model, at least one in first wave length area and second wave length area
A wavelength zone is 780nm to the wavelet length area of 1mm infrared regions.It is preferred that selecting the son in the near infrared region of 780nm to 2500nm
Wavelength zone.For example, determining a wavelength zone by the wavelet length area of visible spectrum, while a wavelength is selected near infrared region
Area.The reflecting properties near infrared wavelength zone can particularly securely distinguish mist and above-mentioned reflection case as a result,.
A kind of preferred embodiment of mist sensor according to the present utility model provides that first wave length area and second wave length area are equal
Positioned near infrared region.
Particularly suitable scheme is to select 835 to 845nm, preferably 839 to 841nm wavelength zone as first wave length area,
Particularly advantageous scheme is to select 945 to 955nm, preferably 949 to 951nm wavelength zone as second wave length area.
It is preferred that making when designing analytic unit, by belonging to the intensity of the reflection signal in first wave length area and belonging to the second wave
The intensity of the reflection signal in long area constitutes signal difference.
A kind of preferred embodiment of mist sensor according to the present utility model provides that transmitter unit has at least multiple optional
The light source of control, wherein according to Control Cooling, the maximum value of a correlation spectrum is located in first wave length area, a related light
The maximum value of spectrum is located in second wave length area.For example, the transmitter unit has at least two semiconductor diodes (LED), by
The semiconductor diode generates optical signalling, which has wavelength zone according to the present utility model or wave in spectrum
It is long.
It is preferred that providing, which makes in design, does not only surpass in the difference of the reflectivity in relatively reflectivity
When crossing defined numerical value, just confirm that there are mists.In other words, according to wavelength zone as defined in the utility model, it is being under the jurisdiction of
When the difference of the reflectivity of one wavelength zone and second wave length area exceeds specified value, analytic unit is determined as fogless state, does not touch
Mist alarm is sent out either to close the external fog lamp of motor vehicle or prevent to open fog lamp manually.
In addition, the utility model further relates to a kind of motor vehicle, the motor vehicle have a kind of above-mentioned embodiment according to this reality
With novel mist sensor.The mist sensor is for example integrated in the windshield of motor vehicle.According to one kind of the motor vehicle
Preferred variants should make its area of space be located at the top on road surface when being aligned mist sensor.Alignment refers to by launch angle shape
At pencil alignment when make the pencil not touch road surface on smooth runway.For example, transmitter unit
The main direction of the launch is parallel to road surface or points into the sky, i.e., shape inclination is pointed at road surface.
In addition, the utility model further relates to the application of mist sensor in a motor vehicle in a kind of above-mentioned embodiment.
Description of the drawings
The utility model is described in detail according to attached drawing hereafter.The merely illustrative figure of attached drawing, only illustrates one kind
Preferred embodiment.Wherein：
Fig. 1 shows a kind of schematic diagram of the motor vehicle 2 according to the present utility model equipped with mist sensor 2；
Fig. 2 shows a kind of schematic diagrames of mist sensor 2 according to the present utility model；And
Fig. 3 shows reflectivity and the schematic diagram of wavelength relationship.
Specific implementation mode
Fig. 1 shows a kind of motor vehicle 1 equipped with mist sensor 2 according to the present utility model.The mist sensor is installed
At the rearview mirror level altitude of 1 windshield of motor vehicle.The transmitter unit for the optical signalling not being shown specifically in Fig. 1 is right
Qi Shiying makes, is bored towards in the area of space 3 in 1 front of motor vehicle by the transmitting that launch angle is formed, the area of space
Only part is higher than the road surface 6 that motor vehicle 1 moves in this embodiment, because of interval and planar road of the transmitting cone at several meters
Intersect in face 6.The main direction of the launch 7 of transmitter unit is roughly parallel to road surface 6, and having for being not shown in Fig. 1 receives feature
Receiving unit is aligned with corresponding manner, to receive the optical signalling from 3 scattered reflection of area of space.
The theory structure of mist sensor 2 according to the present utility model illustrates according to fig. 2.Mist sensor 2 has band two
The transmitter unit 4 of a optional control light source 4a, 4b.Light source 4a and 4b is had different but several based on the optical signalling being transmitted from
Monochromatic spectrum.Light source 4a has maximum intensity in the spectrum of wavelength X 1=840nm is shown, and light source 4b is in wavelength X 2
The spectrum of=950nm has maximum intensity in showing.Each wavelength determines a close monochrome in the utility model meaning
Wavelength zone.Light source 4a, 4b are activated sequentially in time so that by transmitter unit 4 area of space formed by straight line 8a,
The optical signalling that 8b is indicated has corresponding spectrum and alternately composition and wave band 8a and 8b sequentially in time.In order to receive point
There is no in the signal that area of space 3 scatters towards the receiving unit of area of space 35 the receiver 5a of only one, light
Spectral sensitivity is suitble to two wavelength zone 8a and 8b (being hereinafter also often simply referred to as wave band) of receiving optical signal 8.The hair
Unit 4 is penetrated with receiving unit 5 to be connected with analytic unit 9 in a manner of electrically conductive.The analytic unit 9 makes that two can be directed in design
The wavelength zone 8a or 8b of the optical signalling 8 of a transmitting of staggering the time determine reflectivity respectively.As shown in figure 3, the reflectivity not only because
Implement the difference of material of scattered reflection and different, and the reflectivity of material is generally also related to special wavelength.It is practical new
Type people is to determine it has been determined that absolute reflection performance (at least be not unique measure) if not detection specific wavelength
Relative reflectance (reflectivity difference of i.e. two wavelength zones), in the more harsh surface of road traffic conditional (such as plastics
Surface, concrete and vegetation) it can be reliably distinguish with the reflecting properties of mist.As shown in figure 3, being λ 1 in selected wavelength
When=840nm and λ 2=950nm, the reflectivity reflectivity corresponding to mist of frosting, concrete and the different wave length of vegetation
Difference DELTA (see point A and B) there is the difference DELTA of bigger ', Δ ", Δ " ' (see point A ', A ", A " ' or point B ', B ", B " ')
Numerical value.Due to for selected by the utility model wavelength zone or the higher transmittings of wavelength X 1=840nm and λ 2=950nm
Rate changes, and by the way that common reflecting material in road traffic is actively discharged, and carries out reliable detection to mist according to ambient conditions.
Claims (11)
1. the mist sensor (2) of motor vehicle (1) of the one kind for being moved on road surface (6), has：Transmitter unit (4), is used for
Area of space (3) transmitting optical signalling (8) around to motor vehicle (1), the optical signalling include the light from optical signalling (8)
At least two of first wave length area (8a) and second wave length area (8b) in spectrum differ by more than the wavelength zone of 50nm；Receiving unit
(5), for receiving reflection signal of the optical signalling (8) from the area of space scattered reflection；And analytic unit (9), it is set
Reflectivity of the meter for determining and more each wavelength zone.
2. the mist sensor (2) according to the claims, wherein transmitter unit (4) can generate optical signalling (8),
It continuously or in chronological order emits at least two wavelength zones (8a, 8b).
3. the mist sensor (2) according to any one of claim 1-2, which is characterized in that first wave length area (8a) and
At least one of second wave length area (8b) wavelength zone is located at infrared region.
4. the mist sensor (2) according to any one of claim 1-2, which is characterized in that first wave length area (8a) and
Second wave length area (8b) is located near infrared region.
5. the mist sensor (2) according to any one of claim 1-2, which is characterized in that first wave length area (8a) is
835 to 845nm, second wave length area is 945 to 955nm.
6. the mist sensor (2) according to any one of claim 1-2, which is characterized in that first wave length area (8a) is
839 to 841nm, second wave length area is 949 to 951nm.
7. the mist sensor (2) according to any one of claim 1-2, which is characterized in that analytic unit (9) is designed to
So that the intensity of the intensity of the reflection signal by belonging to first wave length area (8a) and the reflection signal for belonging to second wave length area (8b)
Constitute signal difference.
8. the mist sensor (2) according to any one of claim 1-2, which is characterized in that transmitter unit (4) has more
The light source (4a, 4b) of a optional control, wherein according to Control Cooling, the maximum value of a correlation spectrum is located at first wave length area
In (8a), the maximum value of another correlation spectrum is located in second wave length area (8b).
9. the mist sensor (2) according to any one of claim 1-2, which is characterized in that the analytic unit (9) designs
At making, be only less than in the difference of the reflectivity in relatively reflectivity as defined in numerical value when, just there are mists for confirmation.
10. a kind of motor vehicle (1) with the mist sensor (2) according to any one of claim 1-9, feature exists
In area of space (3) is located at the front of motor vehicle (1).
11. motor vehicle (1) according to claim 10, which is characterized in that the area of space (3) is above road surface (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016120969.4 | 2016-11-03 | ||
| DE102016120969.4A DE102016120969B4 (en) | 2016-11-03 | 2016-11-03 | Fog sensor with reflection analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207816818U true CN207816818U (en) | 2018-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721365845.6U Active CN207816818U (en) | 2016-11-03 | 2017-10-20 | The mist sensor and motor vehicle of a kind of motor vehicle for being moved on road surface |
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| Country | Link |
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| CN (1) | CN207816818U (en) |
| DE (1) | DE102016120969B4 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019132239A1 (en) | 2019-11-28 | 2021-06-02 | Valeo Schalter Und Sensoren Gmbh | Fog detection method for a vehicle by a fog detector with a specially shaped lens |
| CN113759339B (en) * | 2021-11-10 | 2022-02-25 | 北京一径科技有限公司 | Echo signal processing method, device, equipment and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3735267C3 (en) * | 1987-10-17 | 1996-03-21 | Telefunken Microelectron | Visibility measurement device |
| KR101527810B1 (en) * | 2014-11-27 | 2015-06-11 | 한국건설기술연구원 | Infrared Image Pickup Device for Visibility of Road and Image Pickup Method Using the Same |
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2016
- 2016-11-03 DE DE102016120969.4A patent/DE102016120969B4/en active Active
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| Publication number | Publication date |
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| DE102016120969B4 (en) | 2021-08-19 |
| DE102016120969A1 (en) | 2018-05-03 |
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