CN109969070A - A kind of measuring method of vehicle head lamp traffic safety dazzle threshold value - Google Patents
A kind of measuring method of vehicle head lamp traffic safety dazzle threshold value Download PDFInfo
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- CN109969070A CN109969070A CN201910166440.7A CN201910166440A CN109969070A CN 109969070 A CN109969070 A CN 109969070A CN 201910166440 A CN201910166440 A CN 201910166440A CN 109969070 A CN109969070 A CN 109969070A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/08—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to drivers or passengers
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- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mathematical Physics (AREA)
- Transportation (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value, the vertical illumination characterization head lamp glare that is generated at driver's eye position with vehicle head lamp light source is to driver safety depending on the influence degree recognized；It include: 1) to set background environment；2) headlamp light source performance data is measured；3) relative position of headlamp and pilot's line of vision is set；4) setting safety is depending on recognizing dazzle equal；5) driver's object is depending on recognizing and measuring the vertical illumination at driver's eye position；6) relative position and the angle of headlamp and pilot's line of vision are reset, step 5) is repeated；7) dazzle threshold value is provided according to the data obtained processing result and traffic safety dazzle three dimensional effects region.Method of the invention is calculated for night without the vehicle head lamp traffic safety dazzle of illuminating road, vehicle head lamp light source characteristic, background environment factor, relative position factor, driver safety are considered depending on recognizing demand, provides good foundation for the setting of road glare screen.
Description
Technical field
The present invention relates to highway dazzle technical field, in particular to a kind of driving at night is pacified without illuminating road headlamp traffic
The measuring method of full dazzle threshold value.
Background technique
Anti-Glare Devices in Freeway setting height is unreasonable, directly affects the traffic safety and riding comfort of driving at night.Glare screen
Excessive height, though having good antiglare effect, the lateral visual field is insufficient, and space constriction is strong, does not have economy；If setting
Height is insufficient, when opposed vehicle headlamp light enters driver's eyes with some strength, will lead to driver and occurs under eyesight
It is lost in the drop even short time and causes traffic accident depending on the ability of recognizing, or because of anxiety.And glare reduction techniques are based only upon at this stage
Driver linear section depending on recognize height, car light height, in terms of carry out simple designs.
The outer research about vehicle head lamp traffic safety dazzle of Current Domestic is less, is largely referred from road lighting
The achievement in dazzle field, the research without reference to headlamp light source characteristic and driver safety depending on recognizing demand.Establish dazzle threshold value
Influence factor do not consider thorough, the not no measuring method about dazzle three dimensional effects region and dazzle threshold value.
Summary of the invention
It is an object of the invention to solve the defect of existing glare screen setting technology, it is reliable to provide a kind of foundation, behaviour
The measuring method for making easy night without a licence bright road road vehicles headlamp traffic safety dazzle threshold value, is related to light source characteristic, preceding photograph
The relative position of lamp and pilot's line of vision, background environment factor, using driver safety depending on recognizing demand, at driver's human eye
Vertical illumination characterizes the influence degree by head lamp glare, establishes dazzle threshold value measuring and calculating system.
The present invention proposes a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value, comprising the following steps:
Step 1: configuration background environment.
Step 2: measurement vehicle head lamp light source characteristic data；
The headlamp light source performance data includes colour temperature, largest light intensity, equiluminous curve.
Step 3: setting headlamp and pilot's line of vision relative position；
Adjust headlamp and driver relative position, obtain vehicle vertical sag curve, convex vertical curve, horizontal curve, straight line,
The flat situation indulged when combining the various linear sections of road such as linear, analysis relative position and influence of the angle factor to dazzle；
The relative position of the headlamp and driver include the angle of headlamp and pilot's line of vision, fore-and-aft distance, laterally away from
From, it is vertical with a distance from.
Step 4: setting safety is depending on recognizing dazzle equal；
In conjunction in driver's driving procedure safely depending on recognizing the physiological stress generated by dazzle Different Effects degree, by dazzle point
For two grades: dazzle grade 1- interferes dazzle, and dazzle grade 2- allows dazzle.
Step 5: driver's object is depending on recognizing and measuring vertical illumination at driver's eye position；
In driver, depending on recognizing, the small target is placed on road surface at 110m immediately ahead of position, and the small target surface reflection coefficient is 0.2
Grey cube, side length 20cm；
Object is carried out depending on recognizing, acquisition light intensity maximum point, reference line, " interfere-allow " datum mark are described to include: depending on recognizing step
1) to horizontal position, light beam falls adjustment headlamp lamps and lanterns center line naturally；
2) driver adapts to 10 minutes in background environment；
3) a kind of advance section is chosen, driver's look straight ahead sight under this advance moves up and down, and finds the strongest height of dazzle
It spends and records, the horizontal line where the height is benchmark line；
4) driver moves right in reference line height, and moving distance is denoted as transfer；It is true depending on recognizing dazzle equal according to safety
The separation for determining dazzle grade 1 and dazzle grade 2 is recorded as " interfere-allow " datum mark, measures and records at this human eye position
Vertical illumination data；
5) according to the transfer of " interfere-allow " datum mark, the equiluminous curve where determining the datum mark in this advance section；
6) driver determines the position for being in " interfere-allow " dazzle grade each point near equiluminous curve, measures and records
Vertical illumination data at each point human eye position connect each point to obtain " interfere-allow " dazzle ranking score boundary line；
7) advance section is reset to repeat 3) to 6) depending on recognizing step；
8) relative position is reset to repeat 3) to 7) depending on recognizing step.
Step 6: dazzle threshold value is obtained；
, depending on recognizing data processing and analyzing, each advance section will be obtained under " interfere-allow " the dazzle grade collected
" interfere-allow " dazzle plane influence area；By handling different advance section dazzle planes influence area data, one is obtained
Dazzle three dimensional effects region under kind relative position；Using same data processing method, dazzle three under different relative positions is obtained
Tie up influence area；
The illumination data in " interfere-allow " the dazzle ranking score boundary line that measurement obtains is handled and analyzed, vehicle head lamp is obtained
The dazzle threshold value of different advance sections.
Background environment described in step 1 is night without illuminating road environment.
It the angle ranging from the angle of headlamp primary optical axis and pilot's line of vision；Fore-and-aft distance (advance) is headlamp and driving
The linear distance along key light axis direction between member, the cross section where advance is advance section；Same advance section, from light intensity
It is lateral distance (transfer) that maximum, which lights the distance moved in the horizontal direction,；Same advance section is lighted from light intensity maximum along perpendicular
Histogram to mobile distance be vertical distance (perpendicular away from).
The angle value of headlamp described in step 3 and pilot's line of vision is that headlamp is rotated up 2 °~8 °, is rotated down
It 2 °~8 °, turns left 3 °~12 °.
Physiological stress when driver described in step 4 is by glare effects refers to driver by eye when glare effects
Eyeball reduces or loses the ability of object observing and details.
Light intensity maximum point described in step 5 is eyes institute when the glare effects suffered by a kind of advance section driver are most strong
At point；
" interfere-allow " datum mark is to interfere dazzle on reference line and allow the position of dazzle grade point of interface.
" disability-interference " datum mark described in step 5 and " interfere-allow " datum mark is the disability glare on reference line
With interference dazzle, interference dazzle and the point for allowing dazzle to have a common boundary depending on recognizing impression.
Step 5 6) described in " interfere-allow " region for being included in dazzle ranking score boundary line be interfere dazzle influence
Region.
" interfere-allow " dazzle plane influence area to be subjected to the point using the driver of accumulation 85% described in step 6
Glare effects as datum mark, be according to the dazzle plane influence area for finding out the advance section with datum mark；
Dazzle three dimensional effects region refers to that driver safety is depending on recognizing demand when pilot's line of vision is in this 3D region
Region by vehicle head lamp glare effects.
Compared with prior art, the present invention have following apparent advantage and the utility model has the advantages that
A kind of measuring method of vehicle head lamp traffic safety dazzle threshold value of the present invention, by analysis night without illuminating road
Opposed vehicle headlamp light source leads to the mechanism of production of driver's dazzle, determine the main influence of headlamp traffic safety dazzle because
Element；Based on driver by reaction to psychological stress raw when glare effects, propose to be suitable for opposite Chinese herbaceous peony illuminator safety depending on recognizing dazzle etc.
Grade scale.Relative position, background environment factor in conjunction with light source characteristic, headlamp and pilot's line of vision, are driven using driver
Safety is measured with the vertical illumination characterization at driver's human eye position by the influence degree of head lamp glare depending on recognizing demand.
By the processing and analysis to great amount of samples data, dazzle three dimensional effects region in the case of different relative positions and dizzy is obtained
Photo threshold.
Since dazzle three dimensional effects region has determined driver safety depending on recognizing demand by vehicle head lamp glare effects
Region accurately gives dazzle threshold value, provides good foundation for the setting of road glare screen.
Detailed description of the invention
With reference to the attached drawing of accompanying, the more purposes of the present invention, function and advantage are by the as follows of embodiment through the invention
Description is illustrated, in which:
Fig. 1 is the flow chart of the preferred embodiment of present invention measuring and calculating headlamp traffic safety dazzle method；
Fig. 2 is headlamp relative spectral power distributions schematic diagram；
Fig. 3 is headlamp equiluminous curve schematic diagram；
Fig. 4 is depending on recognizing the small target schematic diagram；
Fig. 5 is different advance sections depending on recognizing schematic diagram；
Fig. 6 is a kind of advance section depending on recognizing schematic diagram
Fig. 7 is horizontal 10m dazzle plane influence area schematic diagram；
Fig. 8 is upper 4 ° of 7m dazzle plane influence area schematic diagram；
Fig. 9 is level angle dazzle three dimensional effects area schematic；
Specific embodiment
In order to enable those skilled in the art to better understand the present invention, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiment in invention, those of ordinary skill in the art are not being done
Every other embodiment obtained under the premise of creative work out, all should be within the scope of protection of the invention.
Fig. 1 shows the flow chart of the preferred embodiment of present invention measuring and calculating headlamp traffic safety dazzle method, in conjunction with
Headlamp light source characteristic, the relative position of headlamp and pilot's line of vision, background environment factor are needed using driver safety depending on recognizing
It asks, the influence degree by headlamp traffic safety dazzle is characterized with the vertical illumination at driver's human eye position, using following step
The rapid foundation for completing dazzle threshold value measuring and calculating system:
Step 1: configuration background environment, the background environment are night without illuminating road environment.
For vehicle in no illuminating road night running, driver relies solely on headlight beam observation road surface ahead situation and linear
The environment of trend, headlamp light source and night darkness forms extremely strong brightness contrast, is the period that vehicle head lamp glare takes place frequently.
Step 2: measurement vehicle head lamp light source characteristic data, the headlamp light source performance data includes colour temperature, maximum
Light intensity, luminous flux, relative spectral power distributions, equiluminous curve.The characteristic of light source itself such as brightness, colour temperature, spectrum determine
Dazzle is to the influence degree of human eye, and the generation of dazzle is mostly due to the reason of light-source brightness, and the surface area of light source is bigger, and light source is bright
Degree is bigger, and dazzle is also stronger；Indigo plant cone cell luminous efficiency function and non-comfort glare grade are at obvious linear relationship, color
Wen Yuegao, blue light are more, it is easier to observer be made to generate discomfort, relative spectral power distributions figure, equiluminous curve such as Fig. 2
With shown in Fig. 3.
Step 3: setting headlamp and pilot's line of vision relative position, including headlamp primary optical axis and pilot's line of vision
Angle, fore-and-aft distance, lateral distance, vertical distance.With linear variation, the angle of human eye sight and dazzle source primary optical axis
It changes correspondingly；The difference of distance leads to the difference into the beam brightness of human eye；And the height of sighting line of driver and the peace of car light
Dress height, locating lane equally influences driver depending on recognizing, these all be reaction dazzle source and eyes relative position physics
Amount.Light source and eyes are closer, primary optical axis and sight angle are smaller, and dazzle is stronger.By changing relative position, simulating vehicle exists
Situation when such as horizontal curve, straight line, vertical sag curve, convex vertical curve, the flat vertical combination sections of road of specific line style section, analysis
Relative position and influence of the angle factor to dazzle.
The angle value of the headlamp and pilot's line of vision be headlamp be rotated up 2 °, 4 °, 6 °, 8 °, rotate down 2 °,
4 °, 6 °, 8 ° turn left 3 °, 6 °, 9 °, 12 °；The advance value be 3m, 5m, 7m, 10m, 12m, 15m, 30m, 50m, 70m,
100m、120m。
Step 4: setting safety depending on recognizing dazzle equal, avoid dazzle be meet driver safety must depending on recognize traveling
Condition is wanted, meeting when dazzle stimulates generates physiological stress, and driver is made to reduce or lose the energy of object observing and details
Power；The otherness of individual and the understanding to dazzle meaning, are divided into two grades: dazzle grade 1- for dazzle when in conjunction with depending on recognizing experiment
Dazzle is interfered, dazzle grade 2- allows dazzle.
In driver, depending on recognizing, the small target is placed on road surface at 110m immediately ahead of position, is regarded and is recognized object as international lighting association
The 20cm*20cm*20cm grey cube (contrast is lower) of recommendation, surface reflection coefficient 0.2, color and background road surface phase
Closely, as shown in Figure 4.
Table 1 is safety depending on recognizing dazzle equal
Step 5: driver's object is depending on recognizing and measuring vertical illumination at driver's eye position.Change headlamp and driver
Between angle, carry out in different advance sections depending on recognizing, it is as shown in Figure 5 depending on recognizing advance section.In the difference of same advance section
The perpendicular influence area away from by finding interference dazzle depending on recognizing of total departure.Influence area is is included in " interfere-allow " line of demarcation
Region, line of demarcation is made of separation and datum mark, wherein " interfere-allow " datum mark is that transfer is maximum on line of demarcation
Point, while the point is perpendicular away from being also a kind of the perpendicular away from advance section is illustrated in fig. 6 shown below depending on recognizing of light intensity maximum point.Pass through equiluminous
Curve learns that same section is remoter apart from primary optical axis, and illumination reduces more slow.In order to avoid in the farther away section illumination of fore-and-aft distance
Variation is smaller, causes driver depending on recognizing the excessive influence precision of otherness, determines determining laterally " interfere-allow " reference point location
After illuminance information, the position that other are put on line of demarcation is nearby looked for by the equiluminous curve where datum mark, driver
Adjustment confirmation is depending on recognizing impression on this position.
It is described depending on recognize step include: 1) adjustment headlamp lamps and lanterns center line to horizontal position, light beam falls naturally；2) it drives
Member adapts to 10 minutes in background environment；3) a kind of advance section is chosen, driver is under this advance above and below look straight ahead sight
It is mobile, it finds the strongest height of dazzle and records, the horizontal line where the height is benchmark line；4) driver is in reference line height
It moves right, moving distance is denoted as transfer；Dazzle grade 1 and dazzle grade 2 are determined depending on recognizing dazzle equal according to safety
Separation is recorded as " interfere-allow " datum mark, measures and records vertical illumination data at this human eye position；5) according to " dry
Disturb-allow " transfer of datum mark, the equiluminous curve where determining the datum mark in this advance section；6) driver is waiting photograph
Line of writing music nearby determines the position for being in " interfere-allow " dazzle grade each point, measures and records and vertically shines at each point human eye position
Degree evidence connects each point to obtain " interfere-allow " dazzle ranking score boundary line；7) advance section is reset to repeat 3) to 6) view
Recognize step；8) relative position is reset to repeat 3) to 7) depending on recognizing step；
Step 6: dazzle threshold value is obtained；It is handled and is analyzed depending on recognizing data to collecting, using accumulation 85%
The glare effects that driver is subjected to the point are used as " interfere-allow " datum mark, are according to each advance of acquisition with datum mark
" interfere-allow " the dazzle plane influence area of section, as shown in Figure 7 and Figure 8；By handling different advance section dazzle planes
Influence area data obtain 10m advance section standard and " interfere-allow " dazzle ranking score boundary line, are according in terms of by this line of demarcation
The dazzle line of demarcation of 1m to 120m when calculating level angle, obtains dazzle three dimensional effects region；Utilize same data processing side
Method obtains dazzle three dimensional effects region under different relative positions；
The illumination data obtained to measurement is handled and is analyzed, and according to the inverse square theorem of illumination, and is combined and light
The linear relationship of light intensity at source obtains different advance section dazzle threshold values.
Table 2 is level angle dazzle threshold value
Table 3 is 5m advance section different angle dazzle threshold value
Method through this embodiment, it is established that glare effects degree and relative position, headlamp light source characteristic, background ring
Relationship between border, by the processing and analysis depending on recognizing data and illumination data, having obtained dazzle three dimensional effects region and dizzy
Photo threshold provides for Anti-Glare Devices in Freeway setting method and effectively and reasonably meets driver safety, is comfortable depending on recognizing demand
Guidance standard.
Claims (8)
1. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value, which comprises the following steps:
Step 1: configuration background environment；
The background environment is night without illuminating road environment；
Step 2: measurement vehicle head lamp light source characteristic data；
The headlamp light source performance data includes colour temperature, largest light intensity, equiluminous curve；
Step 3: setting headlamp and pilot's line of vision relative position；
Adjust headlamp and driver relative position, obtain vehicle vertical sag curve, convex vertical curve, horizontal curve, straight line,
Situation when the linear various linear sections of road of flat vertical combination, analysis relative position and influence of the angle factor to dazzle；
The relative position of the headlamp and driver include the angle of headlamp and pilot's line of vision, fore-and-aft distance, laterally away from
From, it is vertical with a distance from；
Step 4: setting safety is depending on recognizing dazzle equal；
In conjunction in driver's driving procedure safely depending on recognizing the physiological stress generated by dazzle Different Effects degree, by dazzle point
For two grades: dazzle grade 1- interferes dazzle, and dazzle grade 2- allows dazzle；
Step 5: driver's object is depending on recognizing and measuring vertical illumination at driver's eye position；
In driver, depending on recognizing, the small target is placed on road surface at 110m immediately ahead of position, carries out object depending on recognizing, it is maximum to obtain light intensity
Point, reference line, " interfere-allow " datum mark, it is described to include: depending on recognizing step
1) to horizontal position, light beam falls adjustment headlamp lamps and lanterns center line naturally；
2) driver adapts to 10 minutes or more in background environment；
3) a kind of advance section is chosen, driver's look straight ahead sight under this advance moves up and down, and finds the strongest height of dazzle
It spends and records, the horizontal line where the height is benchmark line；
4) driver moves right in reference line height, and moving distance is denoted as transfer；It is true depending on recognizing dazzle equal according to safety
The separation for determining dazzle grade 1 and dazzle grade 2 is recorded as " interfere-allow " datum mark, measures and records at this human eye position
Vertical illumination data；
5) according to the transfer of " interfere-allow " datum mark, the equiluminous curve where determining the datum mark in this advance section；
6) driver determines within the scope of 0~30cm near each point each in " interfere-allow " dazzle grade in equiluminous curve
The position of point, measures and records vertical illumination data at each point human eye position, each point is connected to obtain " interfere-allow " dazzle grade
Line of demarcation；
7) advance section is reset to repeat 3) to 6) depending on recognizing step；
8) relative position is reset to repeat 3) to 7) depending on recognizing step；
Step 6: dazzle threshold value is obtained；
, depending on recognizing data processing and analyzing, each advance section will be obtained under " interfere-allow " the dazzle grade collected
" interfere-allow " dazzle plane influence area；By handling different advance section dazzle planes influence area data, one is obtained
Dazzle three dimensional effects region under kind relative position；Using same data processing method, dazzle three under different relative positions is obtained
Tie up influence area；
The illumination data in " interfere-allow " the dazzle ranking score boundary line that measurement obtains is handled and analyzed, vehicle head lamp is obtained
The dazzle threshold value of different advance sections.
2. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
It the angle ranging from the angle of headlamp primary optical axis and pilot's line of vision；Edge of the fore-and-aft distance between headlamp and driver
The linear distance of key light axis direction, the cross section where advance are advance sections；Same advance section lights edge from light intensity maximum
The mobile distance of horizontal direction is lateral distance；Same advance section, the distance moved along the vertical direction is lighted from light intensity maximum
For vertical distance.
3. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
The angle value of headlamp described in step 3 and pilot's line of vision be headlamp be rotated up 2 °~8 °, rotate down 2 °~
It 8 °, turns left 3 °~12 °.
4. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
Physiological stress when driver described in step 4 is by glare effects refers to that driver is dropped by eyes when glare effects
Ability that is low or losing object observing and details.
5. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
The small target described in step 5 is the grey cube that surface reflection coefficient is 0.2, side length 20cm.
6. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
Light intensity maximum point described in step 5 is eyes point when the glare effects suffered by a kind of advance section driver are most strong
At position；
" interfere-allow " datum mark is to interfere dazzle on reference line and allow the position of dazzle grade point of interface.
7. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
Step 5 6) described in " interfere-allow " region for being included in dazzle ranking score boundary line be interfere dazzle the zone of influence
Domain.
8. a kind of measuring method of vehicle head lamp traffic safety dazzle threshold value according to claim 1, it is characterised in that:
" interfere-allow " dazzle plane influence area to be subjected to the dizzy of the point using the driver of accumulation 85% described in step 6
Shadow, which is rung, is used as datum mark, is according to the dazzle plane influence area for finding out the advance section with datum mark；
Dazzle three dimensional effects region refers to that driver safety is depending on recognizing demand when pilot's line of vision is in this 3D region
Region by vehicle head lamp glare effects.
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Cited By (1)
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| CN111731182A (en) * | 2020-02-19 | 2020-10-02 | 江苏大学 | Dipped beam illumination control system and method capable of adapting to severe weather |
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