CN109795321A - A kind of auto navigation HUD head-up-display system - Google Patents
A kind of auto navigation HUD head-up-display system Download PDFInfo
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- CN109795321A CN109795321A CN201910206642.XA CN201910206642A CN109795321A CN 109795321 A CN109795321 A CN 109795321A CN 201910206642 A CN201910206642 A CN 201910206642A CN 109795321 A CN109795321 A CN 109795321A
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Abstract
The present invention relates to automobile equipment technical field, in particular a kind of auto navigation HUD head-up-display system, including automobile sensor, SCM system, signal acquisition unit, keyboard, power supply unit and projection arrangement；Automobile sensor is used to acquire the tach signal of engine；SCM system use is the core as signal processing, also the core as head up display system；Signal acquisition unit is for acquiring engine speed information.The present invention can make driver be not required to bow while the car is driving and check that instrument board obtains running car shape and reads a letter breath.It is asked when will not thus generate eliminating driving blind area, so that it is safer to drive especially scorch and nighttime driving；Has real-time display fast response time, driver can promptly and accurately obtain important situation of remote in scorch, safer；HUD new line display interface is succinct, intuitive, readability, and driver can obtain advantageous information in a short time, so as to shorten the reaction time.
Description
Technical field
The present invention relates to automobile equipment technical field, specially a kind of auto navigation HUD head-up-display system.
Background technique
With the continuous development of society, the vehicles such as automobile, train, aircraft is continuous universal, and people are to traffic safety
Concern constantly deepen.Show according to the newest report of the World Health Organization: traffic accident has become the whole world the after disease
Two endanger greatly the factor of human life's safety, and there is over million peoples to die of traffic accident every year.Automotive safety is as the following vapour
Three direction, that is, safety, the important component of energy-saving and environmental protection of vehicle development, therefore automotive safety technology has caused people
Extensive concern and research.When driver drives a car, the acquisition of 85% information is all to be obtained by vision, therefore correlation regards
The automotive safety technology of feel is the most important thing of automotive safety research.
When driving, when especially running at high speed, the eliminating driving blind area time of 3s-5s is breakneck.Such as one
The automobile of speed per hour 100km/h, the eliminating driving blind area 3s-5s time running car distance add emergency stopping distance about 200m,
Driver bow while the car is driving check instrument board obtain running car shape read a letter breath when spend 3s-5s, or it is longer
Destructive power is very big, extremely dangerous.In consideration of it, providing a kind of auto navigation HUD head-up-display system.
Summary of the invention
The purpose of the present invention is to provide a kind of auto navigation HUD head-up-display systems, to solve in above-mentioned background technique
It is proposed nowadays driver bow while the car is driving check instrument board obtain running car shape read a letter breath when spend 3s-
5s or very big, the extremely dangerous problem of longer destructive power.
To achieve the above object, the invention provides the following technical scheme:
A kind of auto navigation HUD head-up-display system, including automobile sensor, SCM system, signal acquisition unit, key
Disk, power supply unit and projection arrangement；
The automobile sensor is used to acquire the tach signal of engine；
The SCM system use is the core as signal processing, also the core as head up display system；
The signal acquisition unit can know collected signal condition at single-chip microcontroller for acquiring engine speed information
Other square-wave pulse signal, and signal is passed into single-chip microcontroller and carries out information processing；
Self-powered be converted to of automobile is made the voltage of entire head up display system worked well by said supply unit；
The keyboard is used for instruction input, instruction modification and system switching.
Preferably, the automobile sensor uses the hall sensor based on Hall effect, according to Hall sensor
The pulse signal of generation, speed can be calculated by the distance of the corresponding traveling of each square-wave pulse, the specific steps are as follows:
Automobile computer calculates the umber of pulse of Hall sensor input first, then carries out to the operating range of input signal tired
Add, the drive connection of driving wheel and sensor is obtained by following formula:
nc=iqicnq,
N in formulaCThe revolution of Hall sensor trigger wheel, n when referring to running car 1kmqAutomobile drive rotates when referring to traveling 1km
The revolution crossed, iqRefer to base ratio, iCRefer to the transmission ratio of gear connection between speed changer and sensor；
The radius of driving wheel tire is r, the theoretical revolution n of driving wheel when calculating running car 1kmq, can be asked by following formula
Out:
nq=1000/2 π r=500/ π r,
Tire is deformed due to automotive dead weight and its influence of load-carrying factor, and real radius is with rolling radius rrCome
It calculates, therefore when running car 1km, the practical revolution n of driving wheelq' acquired by following formula:
nqThe π r of '=1000/2r=500/ π rr；
In conclusion the revolution n of Hall sensor trigger wheel in running car 1kmCIt can be obtained by following formula:
nc=iqicnq′；
There is M magnetic sheet on Hall sensor trigger wheel, and when running car 1km, the revolution of sensor-triggered wheel is nC, then
The operating range L (m) of each burst length automobile are as follows:
L=1000/ncm。
Preferably, the signal acquisition unit utilize Hall sensor principle, using signal acquisition, low-pass filtering,
The counting of counter 8253, single-chip microcontroller calculation processing, the conversion of VGA signal and projection device realize signal acquisition process.
Preferably, the signal of the Hall sensor output will be amplified, be filtered by signal processing circuit
The pulse square wave signal of single-chip microcontroller recognition can just be become later, signal processing circuit is the important component in this system, suddenly
The high level of your sensor output signal is 12V, low level 0V, and a triode shaping circuit beam is added in circuit to this
After signal is handled, then handled by single-chip microcontroller.
Preferably, the projection arrangement uses the micro projector of LED based LCOS projection display technique.
Preferably, the micro projector includes projection light source, optical system and display chip, the optical system
Driving circuit, the input terminal of the driving circuit and the output end of active circuits are respectively connected with the input terminal of the projection light source
Connection, the input terminal of the active circuits and the output end of interface circuit connect.
Preferably, the workflow of the micro projector includes the following steps:
S1: display chip is irradiated using the projection light source of high brightness；
S2: the information on display chip is amplified by the lighting system and display panel of optical system；
S3: the information on display chip is launched on the screen by the projection lens of optical system again.
Preferably, the micro projector uses the USB interface of MCU driving.
Preferably, the circuit of said supply unit includes two parts, a portion using the ground wire of automotive interior come
Interior electromagnetic interference is shielded, shielding is played the role of；Another part meets system using the design of direct current conversion control circuit chip
It is required that DC-DC reduction voltage circuit, two parts circuit is combined or is depressured the circuit of power supply unit.
Compared with prior art, the beneficial effects of the present invention are: this auto navigation HUD head-up-display system can make to drive
Member, which is not required to bow while the car is driving, checks that instrument board obtains running car shape and reads a letter breath.It is blind that driving will not thus be generated
Qu Shiwen, so that it is safer to drive especially scorch and nighttime driving；Have real-time display fast response time, driver
Important situation of remote can be promptly and accurately obtained in scorch, it is safer；HUD new line display interface is succinct,
Intuitively, readable, driver can obtain advantageous information in a short time, so as to shorten the reaction time.
Detailed description of the invention
Fig. 1 is system schematic of the invention；
Fig. 2 is the structural block diagram of single-chip microcontroller of the invention；
Fig. 3 is HUD system structure diagram of the present invention；
Fig. 4 is the system schematic of micro projector of the present invention；
Fig. 5 is the flow diagram of projection process of the present invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
A kind of auto navigation HUD head-up-display system, as shown in Figure 1, including automobile sensor, SCM system, signal
Acquisition unit, keyboard, power supply unit and projection arrangement；
Automobile sensor is used to acquire the tach signal of engine；
SCM system use is the core as signal processing, also the core as head up display system；
Signal acquisition unit is identifiable at single-chip microcontroller by collected signal condition for acquiring engine speed information
Square-wave pulse signal, and signal is passed into single-chip microcontroller and carries out information processing；
Self-powered be converted to of automobile is made the voltage of entire head up display system worked well by power supply unit；
Keyboard is used for instruction input, instruction modification and system switching.
It is worth noting that as shown in Fig. 2, the single-chip microcontroller in the present invention uses AT89C51 single-chip microcontroller, AT89C51 monolithic
A kind of low-power consumption of machine, high performance 8 single-chip microcontrollers, flash may be programmed erasable read only memory in the piece with 4K byte
PEROM, using the high-density nonvolatile memory NURAM technology of COMS technique and atmel corp, pin and instruction system are all
It is compatible with MCS-51.AT89C51 on-chip memory allow in system editing procedure or with programming non-volatile memory device come
Programming.Therefore AT89C51 is a kind of functional, flexibility and the high single-chip microcontroller of cost performance, by being constituted with lower component: 4K byte
Programmable flash read-only memory；Full quiescent operation: 0Hz~24Hz, three-level program storage；128*8 byte inner RAM；32
A programmable input/output port；2 16 bit timing devices/counters；6 interrupt sources；Programmable serial-port；The oscillation of piece internal clock
Device.
Specifically, automobile sensor uses the hall sensor based on Hall effect, generated according to Hall sensor
Pulse signal, speed can be calculated by the distance of the corresponding traveling of each square-wave pulse, the specific steps are as follows:
Automobile computer calculates the umber of pulse of Hall sensor input first, then carries out to the operating range of input signal tired
Add, the drive connection of driving wheel and sensor is obtained by following formula:
nc=iqicnq,
N in formulaCThe revolution of Hall sensor trigger wheel, n when referring to running car 1kmqAutomobile drive rotates when referring to traveling 1km
The revolution crossed, iqRefer to base ratio, iCRefer to the transmission ratio of gear connection between speed changer and sensor；
The radius of driving wheel tire is r, the theoretical revolution n of driving wheel when calculating running car 1kmq, can be asked by following formula
Out:
nq=1000/2 π r=500/ π r,
Tire is deformed due to automotive dead weight and its influence of load-carrying factor, and real radius is with rolling radius rrCome
It calculates, therefore when running car 1km, the practical revolution n of driving wheelq' acquired by following formula:
nqThe π r of '=1000/2r=500/ π rr；
To sum up, the revolution n of Hall sensor trigger wheel in running car 1kmCIt can be obtained by following formula:
nc=iqicnq′；
There is M magnetic sheet on Hall sensor trigger wheel, and when running car 1km, the revolution of sensor-triggered wheel is nC, then
The operating range L (m) of each burst length automobile are as follows:
L=1000/ncm。
Signal acquisition unit utilizes the principle of Hall sensor, is counted using signal acquisition, low-pass filtering, counter 8253
Number, single-chip microcontroller calculation processing, the conversion of VGA signal and projection device realize signal acquisition process.
As shown in figure 3, after the signal of Hall sensor output will be amplified, be filtered by signal processing circuit
The pulse square wave signal of single-chip microcontroller recognition can just be become, signal processing circuit is the important component in this system, and Hall passes
The high level of sensor output signal is 12V, low level 0V, and a triode shaping circuit beam is added in circuit to this signal
After being handled, then handled by single-chip microcontroller.
Projection arrangement uses the micro projector of LED based LCOS projection display technique.
It is worth noting that the advantages of LCOS shadow casting technique, has:
(1) light utilization efficiency is high, and the light utilization ratio of LCOS projection is up to 40% or more, close to DLP laser projection, belongs to light benefit
It is less than 10% with the light utilization efficiency of the higher reflective imaging technique of efficiency, and the LCD projection of penetration imaging.
(2) small in size, peripheral circuit can be all integrated on substrate by LCOS shadow casting technique, can reduce periphery circuit in this way
And packaging cost, and achieve the purpose that reduce volume.
(3) high resolution, the transistor and driving circuit that LCOS is shown are incorporated under the reflecting surface in silicon substrate, are not take up
Substrate surface area, only pixel pitch can occupy opening area, and the thin film transistor of penetration liquid crystal device and lead
Line all occupies opening area, therefore all LCD is imaged than penetration in the resolution ratio of theoretically LCOS display technology and opening area
Height, resolution ratio can reach super extended graphics array.
(4) technology maturation, the production of LCOS display can be divided into semiconductor CMOS manufacture and liquid crystal display panel fitting encapsulation system
It makes, the manufacturing cost of CMOS is low, yields is high, this has benefited from its mature design, analog simulation, manufacture and detection technique；Though
The yields of right LCD panel fitting encapsulation only has 30%, but LCD panel manufacturing technology is highly developed, therefore its yields mentions
DMD can be faster than by rising, so LCOS display technology should become the mainstream of projection display technique than DLP display technology advantageously.
Further, micro projector includes projection light source, optical system and display chip, optical system and projected light
The input terminal in source is respectively connected with driving circuit, and the input terminal of driving circuit and the output end of active circuits connect, active circuits
The connection of the output end of input terminal and interface circuit.
It is worth noting that, micro projector is limited by interior installation space, virtual image focus is projected not infinite
At a distance, with only several meters of the distance between driver.If virtual image forming is in unlimited distance, the sight focus of driver is just
It can be attracted by the projection virtual image of unlimited distance, just as pilot's line of vision Focus Club moves forward as speed improves, drive
The visual field of member will become narrow, and binocular fixation point is infinite from infinite point to nearby constantly conversion when driver-operated
The virtual image of distant place can be overlapped with the environment in front, and driver is made to have a kind of feeling of ghost image；If display is at infinity,
It is had when turning around a curve depending on recognizing uncoordinated feeling；Therefore, micro projector projection virtual image display position cannot be in infinity
Place, but the projection virtual image is made to show the distance between driver about at 1.5m~2.5m, it is suspended in above front bumper,
Micro projector uses the USB interface of MCU driving.
Specifically, as shown in figure 4, the workflow of micro projector includes the following steps:
S1: display chip is irradiated using the projection light source of high brightness；
S2: the information on display chip is amplified by the lighting system and display panel of optical system；
S3: the information on display chip is launched on the screen by the projection lens of optical system again.
In addition, the circuit of power supply unit includes two parts, a portion shields car using the ground wire of automotive interior
Electromagnetic interference plays the role of shielding；Another part meets the DC- of system requirements using the design of direct current conversion control circuit chip
Two parts circuit is combined or is depressured the circuit of power supply unit by DC reduction voltage circuit, it is contemplated that instant high-voltage generates in automobile
Electromagnetic interference, covered using shielding, circuit system be mounted on inside metal net shaped cover, circuit ground connects in metal mesh
Side, metal cap flank automobile shielding line outside, and this device makes to interfere electromagenetic wave radiation less than circuit system, will not be to circuit system
Generate interference.Meanwhile reasonably imperial line is also carried out to circuit system, high-power circuit will be close to load, sensitive small function
Rate circuit keeps apart large and small power circuit close to signal source as far as possible, and what reduction harness was asked interfering with each other and radiating.
As shown in figure 5, SCM system is the core of signal processing and the core of head up display system；Power supply is single
Self-powered be converted to of automobile can be made the voltage of entire head up display system worked well by member, and power supply conversion process needs to shield
Circuit is covered to fall the interference shielding of automotive interior；The present invention only selects engine rotational speed signal to be acquired, collected letter
Number conditioning is then passed to single-chip microcontroller and carries out information processing, in this course at the identifiable square-wave pulse signal of single-chip microcontroller
It needs the signal exported to Hall sensor the processing such as to be obtained, filtered, is then passed to counter, is passed to by counter
Single-chip microcontroller is handled, and obtained result is converted to the VGA signal of standard, this signal is passed to projection arrangement and carries out HUD throwing
Shadow shows that the present invention uses VGA projection signal, this just needs to generate the projection signal for meeting VGA standard using SCM system.
Embodiment 2
As second of embodiment of the invention, auto navigation HUD head-up-display system of the invention is adjusted by four-way
Reflecting optics are adjusted to the adapted to optimum angle of habits different from driver's height, figure and driving habit sitting posture etc. by mechanism
Degree, driver can be avoided to bow when watching the information such as navigation understanding traffic route when vehicle travels causes vehicle that traffic occurs
A possibility that accident, while structure is simple, it is easy for installation, it is versatile, since reflecting optics and sucker are made of one formula knot
Structure, it is different in order to solve the moulding of a variety of models windshield, vertically and horizontally both direction is devised on four-way regulating mechanism
Adjusting and fixed mechanism, first is that searched out when being easily installed one to the least place of pilot's line of vision direct interference install mirror
Piece, because being sucker structure, the later period can also adjust according to the height difference of different drivers, while the adjusting of both direction
It can ensure that driver can clearly understand navigation using sight remaining light in the case where the main line of sight is without departing from vehicle driving road
Key message.
In addition, the present invention is using the HUD color based on ergonomics and shows symbol technology, vehicle-mounted man-machine interface
One major defect is exactly to generate non-intuitive display picture.Under danger situation, such as in the highway driving of low visibility,
Display delay or display caused by the display interface design of low efficiency and the incoherent information of driving are all fatal.Total comes
It says, the design of interface and its function has to follow people-oriented method.Therefore, display interface should enhance the row of driver
For (improving manipulation mobility by using traffic character), perception (vision is improved by front vehicles anticollision symbol) and judgement
Power (by the display of lane symbol, the decision for assisting driver to make choosing lane and overtake other vehicles).In addition, it should guide with it is auxiliary
It helps driver rather than constrains the driving behavior of driver.Therefore, when designing HUD display interface, vision can be passed through
Prompt is to enhance and extend the cognitive ability of driver.All essential informations are all with the diagram shape of driver's energy fast understanding
Formula provides.
Auto navigation HUD head-up-display system of the invention can make driver be not required to bow while the car is driving and look into
Watching the instruments to examine and seize takes running car shape to read a letter breath.It asks when will not thus generate eliminating driving blind area, is especially driven at a high speed so that driving
It sails safer with nighttime driving；Has real-time display fast response time, driver can be promptly and accurately in scorch
The important situation of remote of acquisition, it is safer；HUD new line display interface is succinct, intuitive, readability, and driver can be short
Advantageous information is obtained in time, so as to shorten the reaction time.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, described in the above embodiment and specification is only the present invention
Preference, be not intended to limit the invention, without departing from the spirit and scope of the present invention, the present invention also has various
Changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by institute
Attached claims and its equivalent thereof.
Claims (9)
1. a kind of auto navigation HUD head-up-display system, it is characterised in that: adopted including automobile sensor, SCM system, signal
Collect unit, keyboard, power supply unit and projection arrangement；
The automobile sensor is used to acquire the tach signal of engine；
The SCM system use is the core as signal processing, also the core as head up display system；
The signal acquisition unit is identifiable at single-chip microcontroller by collected signal condition for acquiring engine speed information
Square-wave pulse signal, and signal is passed into single-chip microcontroller and carries out information processing；
Self-powered be converted to of automobile is made the voltage of entire head up display system worked well by said supply unit；
The keyboard is used for instruction input, instruction modification and system switching.
2. auto navigation HUD head-up-display system according to claim 1, it is characterised in that: the automobile sensor is adopted
With the hall sensor based on Hall effect, according to the pulse signal that Hall sensor generates, speed can be by each square wave arteries and veins
The distance of the corresponding traveling of punching calculates, the specific steps are as follows:
Automobile computer calculates the umber of pulse of Hall sensor input first, then adds up to the operating range of input signal,
The drive connection of driving wheel and sensor is obtained by following formula:
nc=iqicnq,
N in formulaCThe revolution of Hall sensor trigger wheel, n when referring to running car 1kmqAutomobile driving wheel turns over when referring to traveling 1km
Revolution, iqRefer to base ratio, iCRefer to the transmission ratio of gear connection between speed changer and sensor；
The radius of driving wheel tire is r, the theoretical revolution n of driving wheel when calculating running car 1kmq, it can be found out by following formula:
nq=1000/2 π r=500/ π r,
Tire is deformed due to automotive dead weight and its influence of load-carrying factor, and real radius is with rolling radius rrIt calculates,
Therefore when running car 1km, the practical revolution n of driving wheelq' acquired by following formula:
nqThe π r of '=1000/2r=500/ π rr；
In conclusion the revolution n of Hall sensor trigger wheel in running car 1kmCIt can be obtained by following formula:
nc=iqicnq′；
There is M magnetic sheet on Hall sensor trigger wheel, and when running car 1km, the revolution of sensor-triggered wheel is nC, then each
The operating range L (m) of burst length automobile are as follows:
L=1000/ncm。
3. auto navigation HUD head-up-display system according to claim 2, it is characterised in that: the signal acquisition unit
Using the principle of Hall sensor, counted using signal acquisition, low-pass filtering, counter 8253, single-chip microcontroller calculation processing, VGA
Signal conversion and projection device realize signal acquisition process.
4. auto navigation HUD head-up-display system according to claim 3, it is characterised in that: the Hall sensor is defeated
Signal out will amplify by signal processing circuit, the pulse square wave letter that can just become single-chip microcontroller recognition later is filtered
Number, signal processing circuit is the important component in this system, and the high level of Hall sensor output signal is 12V, low electricity
It puts down as 0V, is added after a triode shaping circuit beam handles this signal in circuit, then pass through what single-chip microcontroller was handled.
5. auto navigation HUD head-up-display system according to claim 4, it is characterised in that: the projection arrangement uses
The micro projector of LED based LCOS projection display technique.
6. auto navigation HUD head-up-display system according to claim 5, it is characterised in that: the micro projector packet
Include projection light source, optical system and display chip, the input terminal of the optical system and the projection light source is respectively connected with drive
Dynamic circuit, the input terminal of the driving circuit and the output end of active circuits connect, the input terminal and interface of the active circuits
The output end of circuit connects.
7. auto navigation HUD head-up-display system according to claim 6, it is characterised in that: the micro projector
Workflow includes the following steps:
S1: display chip is irradiated using the projection light source of high brightness；
S2: the information on display chip is amplified by the lighting system and display panel of optical system；
S3: the information on display chip is launched on the screen by the projection lens of optical system again.
8. auto navigation HUD head-up-display system according to claim 7, it is characterised in that: the micro projector is adopted
With the USB interface of MCU driving.
9. auto navigation HUD head-up-display system according to claim 8, it is characterised in that: the electricity of said supply unit
Road includes two parts, and a portion is shielded interior electromagnetic interference using the ground wire of automotive interior, plays the role of shielding；Separately
A part meets the DC-DC reduction voltage circuit of system requirements using the design of direct current conversion control circuit chip, by two parts circuit knot
Close or be depressured the circuit of power supply unit.
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Cited By (1)
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| CN113766195A (en) * | 2020-06-02 | 2021-12-07 | 青岛海信激光显示股份有限公司 | Laser projection equipment and laser projection display control method |
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