CN109669311A - A kind of projection arrangement used based on parking and its control method - Google Patents
A kind of projection arrangement used based on parking and its control method Download PDFInfo
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- CN109669311A CN109669311A CN201910107125.7A CN201910107125A CN109669311A CN 109669311 A CN109669311 A CN 109669311A CN 201910107125 A CN201910107125 A CN 201910107125A CN 109669311 A CN109669311 A CN 109669311A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/604—Polarised screens
Abstract
The invention discloses a kind of projection arrangements used based on parking, comprising: optical sensor is arranged in car surface, for monitoring intensity of illumination；PM2.5 sensor is arranged in car surface, for monitoring atmosphere particle concentration；Infrared sensor is used to detect front windshield and ground angle and height of car；Camera is arranged in vehicle body, for detecting air visibility；Automobile projector, setting in the car, are projected for phase front windshield；Controller connects the optical sensor, the PM2.5 sensor, the infrared sensor, the camera, the automobile projector, and controls the automobile projector working condition.A kind of projection arrangement used based on parking is provided, vehicle condition can be monitored, and project according to vehicle condition, improves automobile utilization rate in new media.
Description
Technical field
The present invention relates to cultural medium field more particularly to a kind of projection arrangement used based on parking and its controlling parties
Method.
Background technique
The primary demand of people is material requisite.Most basic consumption is food, clothing, housing and transportation.This is rigid and must
Must demand, so can continue most extensively, most in the world, the industry at most done substantially surrounds food, clothing, housing and transportation and shape
At industry.In the world today, various changes emerge one after another, it is to produce that economic field is the most fundamental, most revolution sexually revises
The innovation of industry mode and the appearance of great new technology, and from actually, the innovation of Industry Model is more raw to economy than technological innovation
Influence living comes faster, and also more directly, more extensively, it often to entire industry system and people's daily life to bring to overturn the heavens and cover
The variation on ground.The operation modes such as various O2O start internet+etc. like a raging fire under overall background develop.Interconnection
Net economy and internet+pioneering thought are incorporating our daily life, incorporate into novel big data era tide.
For automobile industry towards rapidly developing in the tide of big data era, the vehicle in a line city such as Beijing and Shanghai is total
Easy breakthrough 3,000,000 of volume, tier 2 cities easily break through 2,000,000, and three common line city vehicle sums also exist
Gradually rise violently.In today that China's economic great development, people's production and living are increasingly plentiful, vehicle seems just into people's daily life
Standard configuration.And the relevant industry of automobile is also come into being therewith.In the epoch that this automobile industry, Automobile Service Business develop on a large scale
Background under, we produce automobile in shadow projection project.
At the same time, media industry is also in the epoch of great development great change, and new media and Digital Media are spreading day
Cover ground the life for being covered with us, therefore, be more flexible, expansionary and dependency automobile in shadow project project meet the tendency of and
It is raw.
Summary of the invention
The present invention is to solve current technology shortcoming, provides a kind of projection arrangement used based on parking, energy
Vehicle condition is monitored, and automobile projection is carried out according to vehicle condition, improves automobile utilization rate in new media.
The present invention also provides a kind of control methods of projection arrangement used based on parking, can be according to actual outside
The characteristics of environment and car body itself, adjusts projective parameter, is more clear parking Projection Display.
A kind of technical solution provided by the invention are as follows: projection arrangement used based on parking, comprising:
Optical sensor is arranged in car surface, for monitoring intensity of illumination；
PM2.5 sensor is arranged in car surface, for monitoring atmosphere particle concentration；
Infrared sensor is used to detect front windshield and ground angle and height of car；
Camera is arranged in vehicle body, for detecting air visibility；
Automobile projector, setting in the car, are projected for phase front windshield；
Controller connects the optical sensor, the PM2.5 sensor, the infrared sensor, the camera shooting
Head, the automobile projector, and control the automobile projector working condition.
Preferably, further includes:
Information acquisition module is used to acquire vehicle condition and traffic information data；
Data transmission module is used for transmission the vehicle condition and traffic information data of acquisition；
Signal receiving module receives the information that the acquisition module and the data transmission module are sent；
Controller connects the signal receiving module, controls the automobile projector.
Preferably,
The automobile projector includes:
Battery is arranged inside the automobile projector, external automobile power supply；
Information receiving module is arranged at the top of the automobile projector, for receiving situation of remote；
Middle control module connects the controller.
Preferably,
The battery is GF-10 stationarity acid proof type lead-acid accumulator.
A kind of control method of the projection arrangement used based on parking, comprising:
Step 1: surveying intensity of illumination E, front windshield and ground level angle α, sky by sensor according to the sampling period
Gas visibility V, particulate in air concentration C；
Step 2: successively above-mentioned parameter is standardized, the input layer vector x={ x of three layers of BP neural network is determined1,
x2,x3,x4}；Wherein x1For intensity of illumination coefficient, x2For front windshield and ground level angle, x3For air visibility, x4For sky
Particle concentration in gas；
Step 3: the input layer DUAL PROBLEMS OF VECTOR MAPPING is to middle layer, the middle layer vector
Y={ y1,y2,…,ym}；M is middle layer node number；
Step 4: obtaining output layer vector o={ o1,o2,o3}；o1For crevice projection angle adjustment factor, o2For projection brightness tune
Save coefficient, o3For stopping signal；
Step 5: control automobile projector angle and projection brightness, make
Wherein,Respectively i-th sampling period output layer vector the first two parameter, βmax、LmaxRespectively throw
The maximum crevice projection angle of image device setting and maximal projection brightness, βi+1、Li+1Respectively the i+1 sampling period when crevice projection angle
With projection brightness.
Preferably,
The also described middle layer node number m meets:Wherein n is input layer number, q
For output layer node number.
Preferably,
Intensity of illumination E, front windshield and ground level angle α, air visibility V, particulate in air concentration C are carried out
Normalized formula are as follows:
Wherein, xjFor the parameter in input layer vector, XjRespectively measurement parameter E, α, V, C, j=1,2,3,4；XjmaxWith
XjminMaximum value and minimum value in respectively corresponding measurement parameter.
Preferably,
When original state, automobile projector angle meets:
Wherein, λ is laser source wavelength, and ν is laser light source frequency, and c is the light velocity in vacuum, and H is at the top of front windshield
Apart from ground level.
Preferably,
When original state, automobile projector brightness meets:
Wherein, U is the voltage rating of automobile projector, and I is the rated current of automobile projector, and P is automobile projector
Rated power, q are elementary charge.
Preferably,
According in the i-th period intensity of illumination, front windshield and ground level angle, air visibility, in air
Grain object concentration, determines automobile projector operating status when the i+1 time period, works as output signalWhen, it is shut down.
It is of the present invention to monitor vehicle condition the utility model has the advantages that provide a kind of projection arrangement used based on parking, and
It is projected according to vehicle condition, improves automobile utilization rate in new media.The present invention also provides a kind of projection dresses used based on parking
The control method set can adapt to not on the same day according to projective parameter is adjusted the characteristics of actual external environment and car body itself
Compression ring border is more clear parking Projection Display, it is easier to be seen.
Detailed description of the invention
Fig. 1 is the projection arrangement top view of the invention used based on parking.
Fig. 2 is the projection arrangement two-dimensional structure schematic diagram of the invention used based on parking.
Fig. 3 is the projection arrangement side view of the invention used based on parking.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
The projection arrangement used based on parking of the invention is specifically included that optical sensor is arranged in car surface, is used for
Monitor intensity of illumination；PM2.5 sensor is arranged in car surface, for monitoring atmosphere particle concentration；Infrared sensor is used for
Detect front windshield and ground angle and height of car；Camera is arranged in vehicle body, for detecting air visibility；Automobile
Projector is arranged in the car, projects for phase front windshield；Controller connects the optical sensor, PM2.5 sensing
Device, the infrared sensor, the camera, the automobile projector, and control the automobile projector working condition.
Further include: information acquisition module connects optical sensor, PM2.5 sensor, infrared sensor, camera, is used for
Acquire vehicle condition and traffic information data；Data transmission module is used for transmission the vehicle condition and traffic information data of acquisition；Signal receives
Module receives the information that the acquisition module and the data transmission module are sent；Controller connects the signal receiving module,
Control the automobile projector.
As shown in Figure 1-3, automobile projector 100 includes: including information receiving module 110, battery 120, projection camera shooting
First 130, each end of projector 140, middle control module 160, usb 1 50, the middle control module 160 is connect by conducting wire and information
Module 110, battery 120, projection lenses camera 130, projector 140 is received to connect；Usb 1 50 is external charge interface,
Battery 120 is connected, charging electric power storage is carried out by external automobile power supply；The information receiving module 110 has compatible sensors
Effect.Middle control module 160 connects controller.
When running car, information receiving module 110 receive sensor running car signal and company publication it is wide
Information is accused, transfers to processor to carry out data storage, the running recording instrument of automobile of Embedded GIS module is housed in processor, makes it
Projection 130 function of camera is opened, 140 function of projector is closed, to carry out driving recording；When automobile parking, equipped with insertion
Whether the running recording instrument of automobile intellectual analysis of formula GIS module judges vehicle at equal red lights or temporary parking, non-above situation, place
Reason device 5 receives information and directly closes projection 130 function of camera, opens 140 function of projector, is received when by running car
Company's information is projected on shield glass with advertisement mode, makes its projection advertisement and other emergence messages.
It is projected in shadow using laser light source.Laser light source has alternative big and spectral luminance factor height of wavelength etc. special
Point can synthesize the color domain coverage ratio of 90% or more nature color seen in human eye, realize perfect color rendition.Meanwhile swashing
Radiant just has the brightness and longer service life of superelevation, greatly reduces the maintenance cost in later period.At the same time, laser is thrown
Shadow machine almost can instantaneous starting, instantaneously reach operating brightness, therefore laser light source projection all regards quick switching on and shutting down as.And
Conventional bulb needs work for a period of time and can be only achieved stable operating temperature when being switched on, and while shutting down also needs a period of time
It radiates, switching on and shutting down are all relatively time-consuming.And laser light source, using LED cold light source, institute's power consumption reaches lower, and nothing
Overheat saying.
In order to keep effect of the advertising information launched in shadow under natural light on daytime more preferable, needing to utilize is scattering polarisation
Glass screen technology.Scattering light glass is kind of a doubling glass product, and there are light transmission shafts, and natural light is incident, half light transmission, and semi-gloss dissipates
It penetrates in translucent, the light projected from projection lens is polarised light, and polarization direction and scattering spread glass light transmission shaft are just
It hands over, is wasted without transmitted light, total scattering occurs, guarantees the absolute clarity for throwing imaging under compared with bright ring border.
It include vehicle positioning system in this product, wherein being made of BDS locating module, sip server and APP cell phone customer
End composition.By BDS module by location information real-time delivery to sip server；Sip server be responsible for location data storage and
Management to client and positioning device；APP cell phone client is accessed in network by mobile network or Wi-Fi, APP mobile phone root
The location information of automobile is inquired to sip server according to device id.
BDS module in shadow includes 4 parts: main processing block, satellite positioning module, GPRS wireless data communication mould
Block, temperature collecting module.STC12C5A60S single-chip minimum system is used as wherein main processing block, satellite positioning module
UM220 module, wireless location data communication module use SM900A module, and temperature collecting module uses digitized DS18B20
Module.Wireless data communication mould is passed through by DS18B20 temperature collection information using the acquisition that UM220 module carries out location information
Block SM900A will collect information and be transferred on public network IP server, and the work of current system is shown with NOKIA5110 liquid crystal display
Make state.
The communication between APP cell phone client, sip server and vehicle positioning equipment is realized using SIP.In vehicle positioning
Between equipment and sip server, location information is sent to sip server by positioning device in the form of SIP request；SIP service
Device receives location information, this is positioned record and is saved in the database.Between APP cell phone client and sip server, visitor
Family end sends the inquiry request to specified vehicle positioning equipment to server；Sip server receives inquiry request, from database
In search for the positioning record of designated equipment, and location information is sent to APP cell phone client in the form of sip response.
Information receiving module receives the advertising information that must be projected by antenna, while the situation of automobile is sent to car owner's hand
On APP on machine.Car owner can remotely check the advertisement release time, some message such as vehicle position.Signal receives mould
Block i.e. vehicle-mounted 4G module.4G LTE is the general designation of the LTE networks standard such as TD-LTE and FDD-LTE.Fast with communication speed,
The features such as network spectrum is wide, communication is flexible.4G module refers to that hardware is loaded into designated frequency band, the LTE protocol of software support standard,
A kind of highly integrated modular general designation of product of software and hardware.Automobile parking front windshield projection device only passes through 4G module and accomplishes letter
Number input and output, vehicle arrangement, car owner's cell phone application and net end server between transmit information.
It is that connection altogether is realized with automobile middle control computer that the computer bluetooth module in module is controlled in shadow, by USB bluetooth mould
The bluetooth module pairing configured after block insertion automobile middle control computer and equipment works.Car owner's cell phone application can be passed through in this way
Progress interacted with automobile computer, such car owner can realize stay indoors can with for the automobile computer of oneself importing music,
The music playlist or air-conditioner temperature of default trip today etc. a series of activities.Having during avoiding car owner from driving need not
Divert attention, to guarantee safety.
The present invention provides a kind of control method of projection arrangement used based on parking, comprising the following steps:
Step 1 S110: BP neural network model is established.
For the BP network architecture that the present invention uses by up of three-layer, first layer is input layer, total n node, corresponding
Indicate n input parameter, a little signal parameters are provided by data preprocessing module.The second layer is hidden layer, total m node, by network
Training process determine in an adaptive way.Third layer is output layer, total q node, by the sound of system actual needs output
It should determine.
The mathematical model of the network are as follows:
Input vector: x=(x1,x2,...,xn)T
Middle layer vector: y=(y1,y2,...,ym)T
Output vector: o=(o1,o2,...,oq)T
In the present invention, input layer number is n=4, and output layer number of nodes is q=3.Hidden layer number of nodes m is estimated by following formula
It obtains:
4 parameters of input signal respectively indicate are as follows: x1For intensity of illumination coefficient, x2For front windshield and ground level angle,
x3For air visibility, x4For particulate in air concentration.
Since the data that sensor obtains belong to different physical quantitys, dimension is different.Therefore, people is inputted in data
Before artificial neural networks, need to turn to data requirement into the number between 0-1.
Specifically, after being standardized, obtaining intensity of illumination coefficient x for intensity of illumination E1:
Wherein, EmaxAnd EminRespectively maximum intensity of illumination and minimum intensity of illumination.
Likewise, after being standardized, obtaining front windshield and ground level to front windshield and ground level angle α
Angle coefficient x2:
Wherein, αmaxAnd αminRespectively front windshield and ground level maximum angle and minimum angle.
Likewise, after being standardized, obtaining air visibility factor x to air visibility V3:
Wherein, VmaxAnd VminRespectively maximum air visibility and minimum air visibility.
Likewise, after being standardized, obtaining particulate in air concentration factor x to particulate in air concentration C4:
Wherein, CmaxAnd CminRespectively particulate in air maximum concentration and minimum concentration.
Three parameters of output respectively indicate are as follows: o1For crevice projection angle adjustment factor, o2For projection brightness adjustment factor, o3
For stopping signal；
Crevice projection angle adjustment factor o1Indicate the projection of crevice projection angle and automobile projector settings when next sampling period
The ratio between maximum angle, i.e., obtain input parameter in the ith sample period, exports the ith sample period by BP neural network
Crevice projection angle adjustment factorAfterwards, the crevice projection angle β in the i+1 sampling period is controlledi+1, make its satisfaction:
Wherein, βmaxFor the maximum crevice projection angle of projection arrangement setting.
Projection brightness adjustment factor o2Indicate the maximum of projection brightness and automobile projector settings when next sampling period
The ratio between projection brightness, i.e., obtain input parameter in the ith sample period, exports the ith sample period by BP neural network
Projection brightness adjustment factorAfterwards, the projection brightness L in the i+1 sampling period is controlledi+1, make its satisfaction:
Wherein, LmaxFor the maximal projection brightness of projection arrangement setting.
Step 2 S120, the training for carrying out BP neural network.
After establishing BP neural network nodal analysis method, the training of BP neural network can be carried out.It is passed through according to the history of product
Test the sample of data acquisition training, and the connection weight w between given input node i and hidden layer node jij, hidden node j and
Export the connection weight w between node layer kjk, the threshold θ of hidden node jj, export the threshold θ of node layer kk、wij、wjk、θj、θk
It is the random number between -1 to 1.
In the training process, w is constantly correctedijAnd wjkValue, until systematic error be less than or equal to anticipation error when, complete
The training process of neural network.
Step 3 S130, acquisition input parameter, obtain output parameter, and control warning device.
Step 3 S130 is specifically included as follows step by step:
S131: according to the sampling period, sensor surveys intensity of illumination E, front windshield and ground when obtaining the ith sample period
Plane included angle α, air visibility V, particulate in air concentration C；
S132: successively standardizing above-mentioned 4 parameters, obtains when the ith sample period three layers of BP neural network
Input layer vector x={ x1,x2,x3,x4}。
S133: the input layer DUAL PROBLEMS OF VECTOR MAPPING to middle layer obtains middle layer vector y={ y when the ith sample period1,
y2,y3,y4}。
S134: the middle layer is mapped to output layer, obtains obtaining output layer vector o={ o when the ith sample period1,
o2,o3}。
S135: the projection angle and projection brightness of control automobile projection arrangement make
Wherein,Respectively i-th sampling period output layer vector the first two parameter, βmax、LmaxRespectively throw
The maximum crevice projection angle of image device setting and maximal projection brightness, βi+1、Li+1Respectively the i+1 sampling period when crevice projection angle
With projection brightness.
When original state, the projection angle of automobile projection arrangement meets:
Wherein, λ is laser source wavelength, and ν is laser light source frequency, and c is the light velocity in vacuum, and H is at the top of front windshield
Apart from ground level.
When original state, the projection brightness of automobile projection arrangement meets:
Wherein, U is the voltage rating of automobile projector, and I is the rated current of automobile projector, and P is automobile projector
Rated power, q are elementary charge.
S136: according to intensity of illumination, front windshield and ground level angle in the i-th period, air visibility, air
Middle particle concentration determines automobile projector operating status when the i+1 time period, works as output signalWhen, it is shut down.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of projection arrangement used based on parking characterized by comprising
Optical sensor is arranged in car surface, for monitoring intensity of illumination；
PM2.5 sensor is arranged in car surface, for monitoring atmosphere particle concentration；
Infrared sensor is used to detect front windshield and ground angle and height of car；
Camera is arranged in vehicle body, for detecting air visibility；
Automobile projector, setting in the car, are projected for phase front windshield；
Controller connects the optical sensor, the PM2.5 sensor, the infrared sensor, the camera, institute
Automobile projector is stated, and controls the automobile projector working condition.
2. the projection arrangement according to claim 1 used based on parking, which is characterized in that further include:
Information acquisition module is used to acquire vehicle condition and traffic information data；
Data transmission module is used for transmission the vehicle condition and traffic information data of acquisition；
Signal receiving module receives the information that the acquisition module and the data transmission module are sent；
Controller connects the signal receiving module, controls the automobile projector.
3. the projection arrangement according to claim 2 used based on parking, which is characterized in that
The automobile projector includes:
Battery is arranged inside the automobile projector, external automobile power supply；
Information receiving module is arranged at the top of the automobile projector, for receiving situation of remote；
Middle control module connects the controller.
4. the projection arrangement according to claim 3 used based on parking, which is characterized in that
The battery is GF-10 stationarity acid proof type lead-acid accumulator.
5. a kind of control method of the projection arrangement used based on parking characterized by comprising
Step 1: surveying intensity of illumination E, front windshield and ground level angle α, air energy by sensor according to the sampling period
Degree of opinion V, particulate in air concentration C；
Step 2: successively above-mentioned parameter is standardized, the input layer vector x={ x of three layers of BP neural network is determined1,x2,
x3,x4}；Wherein x1For intensity of illumination coefficient, x2For front windshield and ground level angle, x3For air visibility, x4For air
Middle particle concentration；
Step 3: the input layer DUAL PROBLEMS OF VECTOR MAPPING is to middle layer, the middle layer vector y={ y1,y2,…,ym}；M is middle layer
Node number；
Step 4: obtaining output layer vector o={ o1,o2,o3}；o1For crevice projection angle adjustment factor, o2It is adjusted for projection brightness and is
Number, o3For stopping signal；
Step 5: control automobile projector angle and projection brightness, make
Wherein,Respectively i-th sampling period output layer vector the first two parameter, βmax、LmaxRespectively projection arrangement
The maximum crevice projection angle of setting and maximal projection brightness, βi+1、Li+1Respectively the i+1 sampling period when crevice projection angle and projection
Brightness.
6. the control method of the projection arrangement according to claim 5 used based on parking, which is characterized in that in also described
Interbed node number m meets:Wherein n is input layer number, and q is output node layer
Number.
7. the control method of the projection arrangement according to claim 6 used based on parking, which is characterized in that illumination is strong
Spend E, front windshield and ground level angle α, air visibility V, the normalized formula of particulate in air concentration C progress are as follows:
Wherein, xjFor the parameter in input layer vector, XjRespectively measurement parameter E, α, V, C, j=1,2,3,4；XjmaxAnd XjminPoint
It Wei not maximum value and minimum value in corresponding measurement parameter.
8. the control method of the projection arrangement according to claim 6 used based on parking, which is characterized in that original state
When, automobile projector angle meets:
Wherein, λ is laser source wavelength, and ν is laser light source frequency, and c is the light velocity in vacuum, and H is front windshield distance from top
Ground level.
9. the control method of the projection arrangement according to claim 8 used based on parking, which is characterized in that original state
When, automobile projector brightness meets:
Wherein, U is the voltage rating of automobile projector, and I is the rated current of automobile projector, and P is the specified of automobile projector
Power, q are elementary charge.
10. the control method of the projection arrangement according to claim 6 used based on parking, which is characterized in that
According to intensity of illumination, front windshield and ground level angle in the i-th period, air visibility, particulate in air
Concentration determines automobile projector operating status when the i+1 time period, works as output signalWhen, it is shut down.
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| US5059957A (en) * | 1988-03-30 | 1991-10-22 | Nissan Motor Company, Limited | Display apparatus for vehicle |
| CN101754881A (en) * | 2007-10-15 | 2010-06-23 | 三菱电机株式会社 | Display device for vehicle |
| CN104442570A (en) * | 2014-11-19 | 2015-03-25 | 柳州航盛科技有限公司 | Projection system for rear window of automobile |
| CN206049533U (en) * | 2015-09-14 | 2017-03-29 | 广州坤杰电子科技有限公司 | A kind of automobile audio-video navigation instrument with two kinds of UI |
| CN107618438A (en) * | 2016-07-13 | 2018-01-23 | 福特全球技术公司 | For observing the HUD of vehicle perception activity |
| CN206077580U (en) * | 2016-08-16 | 2017-04-05 | 深圳市金豪泰科技有限公司 | A kind of driving monitoring system |
| CN108828885A (en) * | 2018-05-03 | 2018-11-16 | 合刃科技（深圳）有限公司 | Light source module group and optical projection system |
| CN109143758A (en) * | 2018-09-12 | 2019-01-04 | 深圳众赢时代科技有限公司 | The technology of automatic enhancing optical projection effect |
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| CN109669311B (en) | 2020-10-13 |
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