CN115503451A - Front windshield assembly, vehicle and automatic light reduction method - Google Patents
Front windshield assembly, vehicle and automatic light reduction method Download PDFInfo
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- CN115503451A CN115503451A CN202211200510.4A CN202211200510A CN115503451A CN 115503451 A CN115503451 A CN 115503451A CN 202211200510 A CN202211200510 A CN 202211200510A CN 115503451 A CN115503451 A CN 115503451A
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- light
- light intensity
- polarized glass
- driver
- front windshield
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
- B60J3/06—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles using polarising effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to the technical field of automobile parts and discloses a front windshield assembly, a vehicle and an automatic light reduction method, wherein the method comprises the following steps: a polarizing glass configured as a cab front windshield; the position identification device is used for identifying the position of the light source and the position of the eyes of a driver and identifying the transmission area of light on the polarized glass; the light sensation identification device is used for sensing light intensity I0 incident to the outer surface of the transmission area of the polarized glass, light intensity I of the inner surface and light intensity IX of the positions of human eyes of a driver; and the polarization assembly comprises a polarizing plate and a driving device, the polarizing plate is arranged on the inner side of the polarized glass, and the driving device is used for driving the polarizing plate to rotate by an angle R according to the received deflection signal so that the difference value is equal to the light intensity threshold value A, so that the light intensity of the transmission area is at least reduced. The front windshield assembly has good light reduction effect, high fusion degree with the polarized glass, no influence on driving experience, no device or structure influencing driving sight, and improved driving safety.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a front windshield assembly, a vehicle and an automatic light reducing method.
Background
With the rapid development of vehicles, the vehicles are widely entered into people's daily lives, but the incidence of traffic accidents therewith is also in a high-speed situation, wherein accidents caused by dazzling situations are more rare. Dazzling means that the eyes of the observer are irradiated with the light source to cause discomfort to the observer, thereby impairing the visual sensation of the observer to the object. The light source that causes the driver to be dazzled is generally the highlight that penetrates through the front windshield of the automobile and enters the cab at a specific angle, and the highlight mainly comes from the high beam of the oncoming vehicle or other high intensity reflections outside the automobile.
In the correlation technique, the majority of the existing vehicle anti-dazzling devices are glasses, light screens and the like, and although the devices play a role in reducing the light to a certain extent, the light reducing effect is poor, and the fusion degree with the front windshield of the vehicle is poor, so that the driving experience is influenced. In addition, the light shielding plate also influences the driving sight and the driving safety of the vehicle.
Disclosure of Invention
The present invention provides a front windshield assembly, a vehicle and an automatic light-reducing method, so as to solve at least one of the above technical problems.
In a first aspect, the present invention provides a front windshield assembly, comprising:
the polarized glass is configured as a front windshield of the cab, and only light with the polarization angle alpha is allowed to enter the cab through the polarized glass;
the position identification device is used for identifying the position of a light source and the position of human eyes of a driver and identifying a transmission area of light from the position of the light source to the position of the human eyes of the driver on the polarized glass;
the light sensation identification device is used for sensing light intensity I0 incident to the outer surface of the transmission area of the polarized glass, light intensity I of the inner surface and light intensity IX of the positions of human eyes of a driver;
the controller is used for comparing the difference value between the light intensity I and the light intensity IX with a pre-stored light intensity threshold value A, and outputting a deflection signal to the polarization component if the difference value is greater than the light intensity threshold value A;
and the polarization component comprises a polarizing plate and a driving device, the polarizing plate is arranged on the inner side of the polarized glass, and the driving device is used for driving the polarizing plate to rotate by an angle R according to the received deflection signal, so that the difference value is equal to the light intensity threshold value A, and the light intensity of the transmission area is at least reduced.
In one embodiment, the location identifying means comprises:
the first camera is arranged on the outer side of the polarized glass and used for identifying the position of a light source;
and the second camera is arranged on the inner side of the polarized glass and is used for identifying the positions of human eyes of a driver.
In a further embodiment, the position recognition device further comprises a processor, the processor establishes a space coordinate system based on the positions of the first camera and the second camera and the plane of the polarized glass, and recognizes the transmission area of the light from the light source position to the position of the eyes of the driver on the polarized glass by combining the eye width.
In one embodiment, the light sensation identification device comprises: and the outer glass light sensor is arranged on the outer side of the polarized glass and used for sensing the light intensity I0 incident to the outer surface of the polarized glass.
In one embodiment, the light-sensing recognition device includes: and the inner glass light sensor is arranged on the inner side of the polarized glass and is used for sensing the light intensity I incident to the inner surface of the polarized glass.
In one embodiment, the light sensation identification device comprises: and the in-vehicle light sensor is arranged in the cab and used for sensing the light intensity IX of the positions of the eyes of the driver.
In one embodiment, the polarizing plate is provided with a plurality of polarizing plates, the plurality of polarizing plates are distributed on the inner side of the polarizing glass in a tiled mode, and the area, corresponding to the position of the eyes of the driver, of the polarizing glass is provided with at least one polarizing plate.
In one embodiment, the driving device is disposed in the cab at an edge of an inner side of the polarizing glass.
In a second aspect, the present invention also provides a vehicle including a front windshield assembly according to any one of the above embodiments.
In a third aspect, the present invention further provides a method for automatically reducing light of a front windshield assembly, including:
identifying a light source position and a driver eye position by using a position identification device of the front windshield assembly, and identifying a transmission area of light from the light source position to the driver eye position on the polarized glass;
sensing light intensity I0 incident to the outer surface of the transmission area of the polarized glass, light intensity I of the inner surface and light intensity IX of the positions of human eyes of a driver by using a light sensation identification device;
and comparing the difference value between the light intensity I and the light intensity IX with a prestored light intensity threshold value A by using a controller, if the difference value is greater than the light intensity threshold value A, outputting a deflection signal to a polarization assembly, and driving a polarizing plate rotation angle R by a driving device of the polarization assembly according to the received deflection signal until the difference value is equal to the light intensity threshold value A.
The technical scheme provided by the invention has the beneficial effects that: the transmission area of the light source on the polarized glass is identified through the position identification device, the controller judges whether the polarized glass has high light according to the comparison result of the light intensity difference value identified by the light sensation identification device and a preset light intensity threshold value, if the polarized glass has the high light, the driving device drives the polaroid rotating angle R to at least reduce the light intensity of the transmission area, the light reducing effect is good, the polarization component is arranged on the inner side of the polarized glass, the fusion degree with the polarized glass is high, the driving experience is not influenced, a device or a structure influencing the driving sight line does not exist, and the driving safety is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a front windshield assembly of the present invention.
Fig. 2 is a schematic flow chart of a method for automatically reducing light of a front windshield assembly according to the present invention.
In the figure: 10-polarized glass; 20-a first camera; 30-a second camera; 40-outer glass light sensor; 50-inner glass light sensor; 60-an in-vehicle light sensor; 70-a polarizer; 80-light source position; 90-driver eye position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
A front windshield assembly as shown in fig. 1, comprising: polarized glass 10, position recognition device, light sensation recognition device, controller and polarization component.
And a polarizing glass 10 configured as a front windshield of the cab and allowing only light having a polarization angle α to enter the cab through the polarizing glass 10.
The position recognition means is used for recognizing the light source position 80 and the driver's eye position 90, and recognizing the transmission area of the light from the light source position 80 to the driver's eye position 90 on the polarizing glass 10.
The position recognition device comprises a first camera 20, a second camera 30 and a processor which are connected through electric signals.
The first camera 20 is disposed outside the polarizing glass 10 to identify a light source position 80. It should be noted that the light source of the present embodiment is not limited to a vehicle lamp, and may be other light sources, such as a street lamp.
The second camera 30 is disposed inside the polarized glass 10 for recognizing the position 90 of the eyes of the driver.
The processor establishes a space coordinate system based on the positions of the first camera 20 and the second camera 30 and the plane of the polarized glass 10, and identifies the transmission area of the light from the light source position 80 to the driver eye position 90 on the polarized glass 10 by combining the eye width. Since the light source position 80 is not fixed, the transmission area of the light from the light source position 80 to the driver's eye position 90 on the polarizing glass 10 is also not fixed in practice. How to accurately obtain the transmission area is also one of the problems to be solved by the embodiment, and compared with the prior art, the technical scheme can obtain a more accurate transmission area, thereby achieving a better light reduction effect. In the prior art, it is common to provide a polarizer in a partial area of the glass directly in front of the main cab, for example, chinese patent publication No. CN 111016593A. Although the structure can achieve the effect of reducing the light to a certain extent, the transmission area of the high light is not accurately known, and the blind rotary polarizer cannot achieve a good effect of reducing the light, but may affect the smooth transmission of the light including the signal lamp through the polarizing glass 10, and thus the driver driving the vehicle.
And the light sensation identification device is used for sensing the light intensity I0 incident to the outer surface of the transmission area of the polarized glass 10, the light intensity I of the inner surface and the light intensity IX of the human eye position 90 of the driver. Wherein the transmission area belongs to one area of the polarizing glass 10.
Specifically, the light sensation identification device includes an outer glass light sensation sensor 40, an inner glass light sensation sensor 50, and an in-vehicle light sensation sensor 60.
The outer glass light sensor 40 is arranged on the outer side of the polarized glass 10 and is used for sensing the light intensity I0 incident to the outer surface of the polarized glass 10. That is, the outer glass light sensation sensor 40 may sense the light intensity I0 of the light source incident to any point of the outer surface of the polarizing glass 10.
The inner glass light sensation sensor 50 is disposed inside the polarized glass 10, and is used for sensing the light intensity I incident to the inner surface of the polarized glass 10. That is, the inner glass light sensation sensor 50 can sense the light intensity I of the light source incident to any point of the inner surface of the polarizing glass 10.
An in-vehicle light sensor 60 is arranged in the driver's cabin for sensing the light intensity IX at the position 90 of the eyes of the driver. The in-vehicle light sensor 60 is arranged in the cab and above the top of the head of the driver, and the light intensity sensing of the human eye position 90 of the driver can be realized by sensing the light intensity of the head area of the driver.
The controller is used for comparing the difference value between the light intensity I and the light intensity IX in the transmission area with a pre-stored light intensity threshold value A, and if the difference value is larger than the light intensity threshold value A, outputting a deflection signal to the polarization assembly.
The outer glass light sensor 40, the inner glass light sensor 50 and the vehicle interior light sensor 60 are respectively connected with the controller through electric signals. In addition, the controller is also in electrical signal connection with the first camera 20, the second camera 30, and the processor.
And the polarizing component comprises a polarizing plate 70 and a driving device, wherein the polarizing plate 70 is arranged on the inner side of the polarizing glass 10, and the driving device is used for driving the polarizing plate 70 to rotate by an angle R according to the received deflection signal so that the difference value is equal to the light intensity threshold value A, so as to at least reduce the light intensity of the transmission area.
In other words, when the difference between the light intensity I inside the polarized glass 10 in the transmission area and the light intensity IX at the position 90 of the eyes of the driver in the cab is greater than the light intensity threshold a, it is determined that the driver suffers from high light interference, which affects driving safety, and the light intensity in the transmission area needs to be reduced, the controller outputs a deflection signal to the driving device of the deflection assembly, and the driving device drives the polarizer 70 to rotate by the rotation angle R, so that the difference between the light intensity I inside the polarized glass 10 and the light intensity IX at the position 90 of the eyes of the driver in the cab is equal to the light intensity threshold a, so as to at least reduce the light intensity in the transmission area, thereby reducing the interference of high light to the driver.
When it is determined that the driver suffers from high light interference, the driving device for driving the polarizer 70 in the transmission region to rotate is activated until the difference between the light intensity I inside the polarized glass 10 and the light intensity IX at the position 90 of the eyes of the driver in the cab = the light intensity threshold a, and the rotation angle R is as follows:
I＝I0(cos(α-β-R)) 2 ＝IX+A
in the formula: i0 is the light intensity of the outer surface of the transmission region of the polarizing glass 10; i is the light intensity of the inner surface of the transmission region of the polarizing glass 10; α is the polarization angle of the polarizing glass 10; β is the polarization angle of the polarizer 70; IX is the light intensity at the position 90 of the eyes of the driver; a is a light intensity threshold value which is a preset value.
Based on the above equation, the rotation angle R can be calculated, and the driving device drives the polarizing plate 70 to rotate according to the calculated rotation angle R.
From the above formula, as the polarizer 70 rotates, (α - β) changes, so that the value of the light intensity I of the inner surface of the transmission region of the polarizing glass 10 changes periodically, and the effect of eliminating the high light can be achieved.
In some embodiments, the driving device is disposed in the cab at the edge of the inner side of the polarizing glass 10. The driving device for driving the polarizer 70 to rotate may be a conventional driving device, and the specific structure of the driving device is not limited in this embodiment.
In some embodiments, the polarizer 70 is provided in plurality, a plurality of polarizers 70 are distributed on the inner side of the polarized glass 10 in a tiled manner, and at least one polarizer 70 is disposed on the region of the polarized glass 10 corresponding to the position 90 of the eyes of the driver. Each of the polarizing plates 70 has a circular shape having an area smaller than that of the polarizing glass 10. The polarizing angle of the polarizer 70 is preset to β, i.e., only light rays with a polarizing angle of β can enter.
The specific process of identifying the transmission area by the position identification device is as follows:
and constructing a space coordinate system XYZ by taking a certain fixed point O in the vehicle as an origin.
Constructing a plane or a curved surface where the polarized glass 10 is located into a plane P in the coordinate system;
the second camera 30 disposed inside the polarized glass 10 (i.e., in the vehicle) captures the position 90 of the eyes of the driver or the position a of the center point of the eyes of the driver relative to the second camera 30 and the plane E of the eyes of the driver at the position a, and converts the position 90 of the eyes of the driver into the position a and the plane E in the coordinate system XYZ according to the position of the second camera 30 relative to the coordinate system.
The first camera 20 disposed outside (i.e., outside) the polarizing glass 10 recognizes a position B of the light source position 80 with respect to the first camera 20, and converts the light source position 80 into a position B in a coordinate system XYZ based on the position of the first camera 20 with respect to the coordinate system.
According to scientific experiments, the maximum angle of human eye visual width is usually 156 °, and the data is known data. The processor (which may be considered as an in-vehicle computer) simulates approximately the area S visible to the human eye by simulating the position 90A of the driver' S eye at an angle of 156 ° on the plane E.
The light source position 80 is converted to a two-point connection line of the position B in the coordinate system XYZ and the position 90A of the eyes of the driver, forming a straight line AB. If the angle formed by the straight line AB and the plane E is more than or equal to 12 degrees, it means that the light source is in the area S which can be seen by human eyes, and the area formed by the intersection point of the straight line AB and the plane P where the polarized glass 10 is located is one point in the transmission area, and the area formed by a plurality of such points forms the transmission area.
The polarizing plate 70 described in this embodiment is also called a polarizer, and is also called a polarizer.
The basic structure of the polarizer includes: the middle most PVA (polyvinyl alcohol), two layers TAC (triacetylcellulose), PSA film (pressure sensitive adhesive), release film and Protective film. The polarizing film is made of a PVA layer, but the PVA layer is very easy to hydrolyze, and in order to protect the physical characteristics of the polarizing film, a (TAC) film with high light transmittance, good water resistance and certain mechanical strength is compounded on each of two sides of the PVA for protection, so that the original polarizer plate is formed.
The driving means may be an existing electro-optical deflector or an acousto-optical deflector. For example, the deflection device mentioned in publication No. CN 201811399936.0.
Based on the same inventive concept, the invention also provides a vehicle comprising the front windshield assembly in any one of the embodiments.
Based on the same inventive concept, the invention also provides a method for automatically reducing light of the front windshield assembly.
Taking fig. 2 as an example, the feedback type closed control strategy of the method of the embodiment is as follows, the position recognition device recognizes the transmission area, and the controller determines whether the transmission area has high light according to the preset light intensity threshold value and the sensing data provided by the light sensing recognition device.
If yes, a deflection signal is sent to the driving device to drive the polaroid 70 to rotate by an angle R, so that the driver has no highlight influence.
If not, the driver has no highlight influence.
The method for automatically reducing the light of the front windshield assembly of the embodiment specifically comprises the following steps:
with the position recognition device of the front windshield assembly, a light source position 80 and a driver's eye position 90 are recognized, and a transmission area of light on the polarizing glass 10 from the light source position 80 to the driver's eye position 90 is recognized.
The light intensity I0 incident to the outer surface of the transmission region of the polarized glass 10, the light intensity I of the inner surface, and the light intensity IX of the position 90 of the human eyes of the driver are sensed by the light sensation recognition means.
And comparing the difference value between the light intensity I and the light intensity IX with a prestored light intensity threshold value A by using a controller, if the difference value is greater than the light intensity threshold value A, outputting a deflection signal containing a rotation angle R to a polarization assembly, and driving the rotation angle R of the polarizing plate 70 by a driving device of the polarization assembly according to the received deflection signal until the difference value is equal to the light intensity threshold value A. In some embodiments, the driving device can drive the polarizer 70 to rotate by other angles according to the deflection signal, so that the difference between the light intensity I and the light intensity IX is smaller than the light intensity threshold a.
It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A front windshield assembly, comprising:
the polarized glass is configured as a front windshield of the cab, and only light with the polarization angle alpha is allowed to enter the cab through the polarized glass;
the position identification device is used for identifying the position of a light source and the position of human eyes of a driver and identifying a transmission area of light from the position of the light source to the position of the human eyes of the driver on the polarized glass;
the light sensation identification device is used for sensing light intensity I0 incident to the outer surface of the transmission area of the polarized glass, light intensity I of the inner surface and light intensity IX of the positions of human eyes of a driver;
the controller is used for comparing the difference value between the light intensity I and the light intensity IX with a pre-stored light intensity threshold value A, and outputting a deflection signal to the polarization component if the difference value is greater than the light intensity threshold value A;
and the polarization component comprises a polarizing plate and a driving device, the polarizing plate is arranged on the inner side of the polarized glass, and the driving device is used for driving the polarizing plate to rotate by an angle R according to the received deflection signal, so that the difference value is equal to the light intensity threshold value A, and the light intensity of the transmission area is at least reduced.
2. The front windshield assembly of claim 1, wherein the position identifying device comprises:
the first camera is arranged on the outer side of the polarized glass and used for identifying the position of the light source;
and the second camera is arranged on the inner side of the polarized glass and is used for identifying the positions of human eyes of a driver.
3. The front windshield assembly of claim 2, wherein the position recognition device further comprises a processor, the processor establishes a space coordinate system based on the positions of the first camera and the second camera and the plane of the polarized glass, and recognizes a transmission area of light from the light source position to the position of the eyes of the driver on the polarized glass by combining the eye width.
4. The front windshield assembly of claim 1, wherein the light sensation identification device comprises: and the outer glass light sensor is arranged on the outer side of the polarized glass and used for sensing the light intensity I0 incident to the outer surface of the polarized glass.
5. The front windshield assembly of claim 1, wherein the light sensation identification device comprises: and the inner glass light sensor is arranged on the inner side of the polarized glass and is used for sensing the light intensity I incident to the inner surface of the polarized glass.
6. The front windshield assembly of claim 1, wherein the light sensation identification device comprises: and the in-vehicle light sensor is arranged in the cab and used for sensing the light intensity IX of the positions of the eyes of the driver.
7. The front windshield assembly of claim 1, wherein the polarizer comprises a plurality of polarizers, the plurality of polarizers are tiled on the inner side of the polarized glass, and the area of the polarized glass corresponding to the position of the eyes of the driver is provided with at least one polarizer.
8. The front windshield assembly of claim 1, wherein the drive device is disposed within the cab at an edge of an inner side of the polarized glass.
9. A vehicle characterized by comprising a front windshield assembly as recited in any one of claims 1-8.
10. A method of automatically reducing light in a front windshield assembly as set forth in any one of claims 1-8, comprising:
identifying a light source position and a driver eye position by using a position identification device of the front windshield assembly, and identifying a transmission area of light from the light source position to the driver eye position on the polarized glass;
sensing light intensity I0 incident to the outer surface of the transmission area of the polarized glass, light intensity I of the inner surface and light intensity IX of the positions of human eyes of a driver by using a light sensation identification device;
and comparing the difference value between the light intensity I and the light intensity IX with a prestored light intensity threshold value A by using a controller, if the difference value is greater than the light intensity threshold value A, outputting a deflection signal to a polarization assembly, and driving a polarizing plate rotation angle R by a driving device of the polarization assembly according to the received deflection signal until the difference value is equal to the light intensity threshold value A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211200510.4A CN115503451A (en) | 2022-09-29 | 2022-09-29 | Front windshield assembly, vehicle and automatic light reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211200510.4A CN115503451A (en) | 2022-09-29 | 2022-09-29 | Front windshield assembly, vehicle and automatic light reduction method |
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| Publication Number | Publication Date |
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| CN115503451A true CN115503451A (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211200510.4A Pending CN115503451A (en) | 2022-09-29 | 2022-09-29 | Front windshield assembly, vehicle and automatic light reduction method |
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| CN (1) | CN115503451A (en) |
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- 2022-09-29 CN CN202211200510.4A patent/CN115503451A/en active Pending
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